Commit 13e2adf341e804e99d6eef0b04025158caae8733

Thomas de Grivel 2024-01-10T12:20:21

s8 -> char

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diff --git a/c3s/c3s.c b/c3s/c3s.c
index 5327c21..ff90bb2 100644
--- a/c3s/c3s.c
+++ b/c3s/c3s.c
@@ -43,7 +43,6 @@ sw buf_xfer_spaces (s_buf *out, s_buf *in)
   assert(in);
   assert(out);
   while ((r = buf_peek_character_utf8(in, &c)) > 0 &&
-         c >= 0 &&
          c < UCD_MAX &&
          g_ucd[c].flags & (UCD_OTHER_CONTROL | UCD_SEPARATOR_SPACE)) {
     csize = r;
@@ -60,10 +59,10 @@ sw buf_xfer_spaces (s_buf *out, s_buf *in)
 
 int main (int argc, char **argv)
 {
-  s8 i[BUF_SIZE];
+  char i[BUF_SIZE];
   s_buf in;
   s_tag input;
-  s8 o[BUF_SIZE];
+  char o[BUF_SIZE];
   s_buf out;
   sw r;
   s_tag result;
diff --git a/ic3/buf_linenoise.c b/ic3/buf_linenoise.c
index 4b6f968..9acc8cf 100644
--- a/ic3/buf_linenoise.c
+++ b/ic3/buf_linenoise.c
@@ -18,15 +18,15 @@
 #include "../linenoise/linenoise.h"
 
 typedef struct buf_linenoise {
-  s_buf     buf;
-  bool      eof;
-  const s8 *prompt;
+  s_buf buf;
+  bool eof;
+  const char *prompt;
 } s_buf_linenoise;
 
 sw buf_linenoise_refill_fgets (s_buf *buf);
 sw buf_linenoise_refill_linenoise (s_buf *buf);
 
-void buf_linenoise_close (s_buf *buf, const s8 *history_path)
+void buf_linenoise_close (s_buf *buf, const char *history_path)
 {
   assert(buf);
   if (history_path)
@@ -38,8 +38,8 @@ void buf_linenoise_close (s_buf *buf, const s8 *history_path)
     puts("");
 }
 
-s_buf * buf_linenoise_open_r (s_buf *buf, const s8 *prompt,
-                              const s8 *history_path)
+s_buf * buf_linenoise_open_r (s_buf *buf, const char *prompt,
+                              const char *history_path)
 {
   s_buf_linenoise *buf_linenoise;
   assert(buf);
@@ -112,7 +112,7 @@ sw buf_linenoise_refill_linenoise (s_buf *buf)
     }
     linenoiseHistoryAdd(buf_linenoise->buf.ptr.p);
     buf_linenoise_len = strlen(buf_linenoise->buf.ptr.p);
-    buf_linenoise->buf.ptr.ps8[buf_linenoise_len++] = '\n';
+    buf_linenoise->buf.ptr.pchar[buf_linenoise_len++] = '\n';
     buf_linenoise->buf.size = buf_linenoise->buf.wpos = buf_linenoise_len;
     buf_linenoise->buf.rpos = 0;
   }
diff --git a/ic3/buf_linenoise.h b/ic3/buf_linenoise.h
index 88f2ebd..dea3d29 100644
--- a/ic3/buf_linenoise.h
+++ b/ic3/buf_linenoise.h
@@ -17,8 +17,8 @@
 #ifndef IC3_BUF_LINENOISE_H
 #define IC3_BUF_LINENOISE_H
 
-void    buf_linenoise_close (s_buf *buf, const s8 *history_path);
-s_buf * buf_linenoise_open_r (s_buf *buf, const s8 *prompt,
-                              const s8 *history_path);
+void    buf_linenoise_close (s_buf *buf, const char *history_path);
+s_buf * buf_linenoise_open_r (s_buf *buf, const char *prompt,
+                              const char *history_path);
 
 #endif /* IC3_BUF_LINENOISE_H */
diff --git a/ic3/ic3.c b/ic3/ic3.c
index 68af6bc..20bed7b 100644
--- a/ic3/ic3.c
+++ b/ic3/ic3.c
@@ -49,7 +49,6 @@ sw ic3_buf_ignore_spaces (s_buf *out, s_buf *in)
   assert(in);
   assert(out);
   while ((r = buf_peek_character_utf8(in, &c)) > 0 &&
-         c >= 0 &&
          c < UCD_MAX &&
          g_ucd[c].flags & (UCD_OTHER_CONTROL | UCD_SEPARATOR_SPACE)) {
     csize = r;
@@ -73,7 +72,6 @@ sw buf_xfer_spaces (s_buf *out, s_buf *in)
   assert(in);
   assert(out);
   while ((r = buf_peek_character_utf8(in, &c)) > 0 &&
-         c >= 0 &&
          c < UCD_MAX &&
          g_ucd[c].flags & (UCD_OTHER_CONTROL | UCD_SEPARATOR_SPACE)) {
     csize = r;
@@ -90,10 +88,10 @@ sw buf_xfer_spaces (s_buf *out, s_buf *in)
 
 int main (int argc, char **argv)
 {
-  s8 i[BUF_SIZE];
+  char i[BUF_SIZE];
   s_buf in;
   s_tag input;
-  s8 o[BUF_SIZE];
+  char o[BUF_SIZE];
   s_buf out;
   sw r;
   s_tag result;
diff --git a/libc3/array.c b/libc3/array.c
index 0a1a860..fe0df65 100644
--- a/libc3/array.c
+++ b/libc3/array.c
@@ -202,7 +202,7 @@ s_array * array_init (s_array *a, const s_sym *type, uw dimension,
   return a;
 }
 
-s_array * array_init_1 (s_array *array, s8 *p)
+s_array * array_init_1 (s_array *array, const char *p)
 {
   s_buf buf;
   uw len;
@@ -211,7 +211,7 @@ s_array * array_init_1 (s_array *array, s8 *p)
   assert(array);
   assert(p);
   len = strlen(p);
-  buf_init(&buf, false, len, p);
+  buf_init(&buf, false, len, (char *) p);
   buf.wpos = len;
   r = buf_parse_array(&buf, &tmp);
   if (r < 0 || (uw) r != len) {
diff --git a/libc3/array.h b/libc3/array.h
index d44900c..254f32e 100644
--- a/libc3/array.h
+++ b/libc3/array.h
@@ -19,7 +19,7 @@
 void      array_clean (s_array *a);
 s_array * array_init (s_array *a, const s_sym *type,
                       uw dimension, const uw *dimensions);
-s_array * array_init_1 (s_array *a, s8 *p);
+s_array * array_init_1 (s_array *a, const char *p);
 s_array * array_init_cast (s_array *a, const s_tag *tag);
 s_array * array_init_copy (s_array *a, const s_array *src);
 s_array * array_init_void (s_array *array);
diff --git a/libc3/buf.c b/libc3/buf.c
index e5a24ed..8adeaf3 100644
--- a/libc3/buf.c
+++ b/libc3/buf.c
@@ -179,7 +179,7 @@ sw buf_ignore_spaces_but_newline (s_buf *buf)
   return result;
 }
 
-s_buf * buf_init (s_buf *buf, bool p_free, uw size, s8 *p)
+s_buf * buf_init (s_buf *buf, bool p_free, uw size, char *p)
 {
   assert(buf);
   assert(p);
@@ -187,7 +187,7 @@ s_buf * buf_init (s_buf *buf, bool p_free, uw size, s8 *p)
   buf->flush = NULL;
   buf->free = p_free;
   buf->line = -1;
-  buf->ptr.ps8 = p;
+  buf->ptr.pchar = p;
   buf->refill = NULL;
   buf->rpos = 0;
   buf->save = NULL;
@@ -197,7 +197,7 @@ s_buf * buf_init (s_buf *buf, bool p_free, uw size, s8 *p)
   return buf;
 }
 
-s_buf * buf_init_1 (s_buf *buf, bool p_free, s8 *p)
+s_buf * buf_init_1 (s_buf *buf, bool p_free, char *p)
 {
   uw len;
   assert(buf);
@@ -208,7 +208,7 @@ s_buf * buf_init_1 (s_buf *buf, bool p_free, s8 *p)
   return buf;
 }
 
-s_buf * buf_init_1_copy (s_buf *buf, const s8 *p)
+s_buf * buf_init_1_copy (s_buf *buf, const char *p)
 {
   uw size;
   assert(buf);
@@ -223,7 +223,7 @@ s_buf * buf_init_1_copy (s_buf *buf, const s8 *p)
 
 s_buf * buf_init_alloc (s_buf *buf, uw size)
 {
-  s8 *p;
+  char *p;
   assert(buf);
   if (! size)
     return buf_init(buf, false, 0, NULL);
@@ -237,7 +237,7 @@ s_buf * buf_init_str (s_buf *buf, bool p_free, s_str *p)
 {
   assert(buf);
   assert(p);
-  buf_init(buf, p_free, p->size, (s8 *) p->ptr.ps8);
+  buf_init(buf, p_free, p->size, (char *) p->ptr.pchar);
   buf->wpos = p->size;
   return buf;
 }
@@ -252,7 +252,7 @@ s_buf * buf_init_str_copy (s_buf *buf, const s_str *str)
   return buf;
 }
 
-s_buf * buf_new (bool p_free, uw size, s8 *p)
+s_buf * buf_new (bool p_free, uw size, char *p)
 {
   s_buf *buf;
   buf = malloc(sizeof(s_buf));
@@ -272,7 +272,7 @@ s_buf * buf_new_alloc (uw size)
   return buf;
 }
 
-sw buf_peek_1 (s_buf *buf, const s8 *p)
+sw buf_peek_1 (s_buf *buf, const char *p)
 {
   s_str stra;
   assert(buf);
@@ -488,13 +488,13 @@ sw buf_peek_str (s_buf *buf, const s_str *src)
   }
   size = buf->wpos - buf->rpos;
   if ((uw) size < src->size) {
-    if (memcmp(buf->ptr.ps8 + buf->rpos, src->ptr.p, size))
+    if (memcmp(buf->ptr.pchar + buf->rpos, src->ptr.p, size))
       return 0;
   }
   if (buf->rpos + src->size > buf->wpos &&
       buf_refill(buf, src->size) < (sw) src->size)
     return 0;
-  if (memcmp(buf->ptr.ps8 + buf->rpos, src->ptr.p, src->size))
+  if (memcmp(buf->ptr.pchar + buf->rpos, src->ptr.p, src->size))
     return 0;
   return src->size;
 }
@@ -513,7 +513,7 @@ sw buf_peek_to_str (s_buf *buf, s_str *dest)
     str_init_empty(dest);
     return 0;
   }
-  str_init_alloc(dest, size, buf->ptr.ps8 + buf->rpos);
+  str_init_alloc(dest, size, buf->ptr.pchar + buf->rpos);
   return size;
 }
 
@@ -593,7 +593,7 @@ sw buf_peek_u64 (s_buf *buf, u64 *p)
     return size;
 }
 
-sw buf_read_1 (s_buf *buf, const s8 *p)
+sw buf_read_1 (s_buf *buf, const char *p)
 {
   s_str stra;
   assert(buf);
@@ -708,7 +708,7 @@ sw buf_read_to_str (s_buf *buf, s_str *dest)
     str_init_empty(dest);
     return 0;
   }
-  str_init_alloc(dest, size, buf->ptr.ps8 + buf->rpos);
+  str_init_alloc(dest, size, buf->ptr.pchar + buf->rpos);
   return buf_ignore(buf, size);
 }
 
@@ -795,7 +795,7 @@ sw buf_refill_compact (s_buf *buf)
       size = buf->wpos - min_rpos;
       assert(size < buf->size);
       memmove(buf->ptr.p,
-              buf->ptr.ps8 + min_rpos,
+              buf->ptr.pchar + min_rpos,
               size);
       buf->rpos -= min_rpos;
       save = buf->save;
@@ -887,7 +887,7 @@ sw buf_vf (s_buf *buf, const char *fmt, va_list ap)
   return r;
 }
 
-sw buf_write_1 (s_buf *buf, const s8 *p)
+sw buf_write_1 (s_buf *buf, const char *p)
 {
   s_str stra;
   str_init_1(&stra, NULL, p);
@@ -907,7 +907,7 @@ sw buf_write_character_utf8 (s_buf *buf, character c)
     assert(! "buffer overflow");
     return -1;
   }
-  character_utf8(c, buf->ptr.ps8 + buf->wpos);
+  character_utf8(c, buf->ptr.pchar + buf->wpos);
   buf->wpos += size;
   return size;
 }
diff --git a/libc3/buf.h b/libc3/buf.h
index f6ad5bd..71fb836 100644
--- a/libc3/buf.h
+++ b/libc3/buf.h
@@ -27,16 +27,16 @@
 
 /* Stack-allocation compatible functions, call buf_clean after use. */
 void    buf_clean (s_buf *buf);
-s_buf * buf_init (s_buf *buf, bool p_free, uw size, s8 *p);
-s_buf * buf_init_1 (s_buf *buf, bool p_free, s8 *p);
+s_buf * buf_init (s_buf *buf, bool p_free, uw size, char *p);
+s_buf * buf_init_1 (s_buf *buf, bool p_free, char *p);
 s_buf * buf_init_alloc (s_buf *buf, uw size);
 s_buf * buf_init_str (s_buf *buf, bool free, s_str *p);
 s_buf * buf_init_str_copy (s_buf *buf, const s_str *str);
 
 /* Heap-allocation compatible functions, call buf_delete after use. */
 void    buf_delete (s_buf *buf);
-s_buf * buf_new (bool free, uw size, s8 *p);
-s_buf * buf_new_1 (bool free, uw size, s8 *p);
+s_buf * buf_new (bool free, uw size, char *p);
+s_buf * buf_new_1 (bool free, uw size, char *p);
 s_buf * buf_new_alloc (uw bytes);
 s_buf * buf_new_str (s_str *str);
 
@@ -48,7 +48,7 @@ sw      buf_ignore_line (s_buf *buf);
 sw      buf_ignore_newline (s_buf *buf);
 sw      buf_ignore_spaces (s_buf *buf);
 sw      buf_ignore_spaces_but_newline (s_buf *buf);
-sw      buf_peek_1 (s_buf *buf, const s8 *p);
+sw      buf_peek_1 (s_buf *buf, const char *p);
 sw      buf_peek_character_utf8 (s_buf *buf, character *p);
 sw      buf_peek_f32 (s_buf *buf, f32 *p);
 sw      buf_peek_f64 (s_buf *buf, f64 *p);
@@ -65,7 +65,7 @@ sw      buf_peek_u32 (s_buf *buf, u32 *p);
 sw      buf_peek_u64 (s_buf *buf, u64 *p);
 sw      buf_read_integer (s_buf *buf, s_integer *dst);
 sw      buf_read_character_utf8 (s_buf *buf, character *p);
-sw      buf_read_1 (s_buf *buf, const s8 *p);
+sw      buf_read_1 (s_buf *buf, const char *p);
 sw      buf_read_f32 (s_buf *buf, f32 *p);
 sw      buf_read_f64 (s_buf *buf, f64 *p);
 sw      buf_read_s8 (s_buf *buf, s8 *p);
@@ -88,7 +88,7 @@ sw      buf_str_to_hex_size (const s_str *src);
 sw      buf_u8_to_hex (s_buf *buf, const u8 *x);
 sw      buf_u8_to_hex_size (const u8 *x);
 sw      buf_vf (s_buf *buf, const char *fmt, va_list ap);
-sw      buf_write_1 (s_buf *buf, const s8 *p);
+sw      buf_write_1 (s_buf *buf, const char *p);
 sw      buf_write_character_utf8 (s_buf *buf, character c);
 sw      buf_write_f32 (s_buf *buf, f32 x);
 sw      buf_write_f64 (s_buf *buf, f64 x);
diff --git a/libc3/buf_inspect.c b/libc3/buf_inspect.c
index cf8ac3c..4a5aef2 100644
--- a/libc3/buf_inspect.c
+++ b/libc3/buf_inspect.c
@@ -712,7 +712,7 @@ sw buf_inspect_f32 (s_buf *buf, const f32 *f)
 
 sw buf_inspect_f32_size (const f32 *f)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   assert(f);
   buf_init(&buf, false, sizeof(b), b);
@@ -787,7 +787,7 @@ sw buf_inspect_f64 (s_buf *buf, const f64 *f)
 
 sw buf_inspect_f64_size (const f64 *f)
 {
-  s8 b[64];
+  char b[64];
   s_buf buf;
   assert(f);
   buf_init(&buf, false, sizeof(b), b);
@@ -1419,7 +1419,7 @@ sw buf_inspect_map (s_buf *buf, const s_map *map)
           return r;
       }
       else
-        if ((r = buf_write_1(buf, k->data.sym->str.ptr.ps8)) < 0)
+        if ((r = buf_write_1(buf, k->data.sym->str.ptr.pchar)) < 0)
           return r;
       result += r;
       if ((r = buf_write_1(buf, ": ")) < 0)
@@ -1631,7 +1631,7 @@ sw buf_inspect_str_byte_size (const u8 *byte)
 
 sw buf_inspect_str_character (s_buf *buf, const character *c)
 {
-  s8 b[4];
+  char b[4];
   s_buf char_buf;
   int i;
   int j;
@@ -1825,7 +1825,7 @@ sw buf_inspect_struct (s_buf *buf, const s_struct *s)
       return r;
   }
   else
-    if ((r = buf_write_1(buf, s->type->module->str.ptr.ps8)) < 0)
+    if ((r = buf_write_1(buf, s->type->module->str.ptr.pchar)) < 0)
       return r;
   result += r;
   if ((r = buf_write_1(buf, "{")) < 0)
@@ -1847,7 +1847,7 @@ sw buf_inspect_struct (s_buf *buf, const s_struct *s)
         return r;
     }
     else
-      if ((r = buf_write_1(buf, k->data.sym->str.ptr.ps8)) < 0)
+      if ((r = buf_write_1(buf, k->data.sym->str.ptr.pchar)) < 0)
         return r;
     result += r;
     if ((r = buf_write_1(buf, ": ")) < 0)
@@ -1856,7 +1856,7 @@ sw buf_inspect_struct (s_buf *buf, const s_struct *s)
     if (s->data) {
       if (! tag_type(s->type->map.value + i, &type))
         return -1;
-      if ((r = data_buf_inspect(type, buf, (s8 *) s->data +
+      if ((r = data_buf_inspect(type, buf, (char *) s->data +
                                 s->type->offset[i])) < 0)
         return r;
       result += r;
@@ -2137,7 +2137,7 @@ sw buf_inspect_tag_size (const s_tag *tag)
 
 sw buf_inspect_tag_type (s_buf *buf, e_tag_type type)
 {
-  const s8 *s;
+  const char *s;
   assert(buf);
   s = tag_type_to_string(type);
   if (! s)
@@ -2147,7 +2147,7 @@ sw buf_inspect_tag_type (s_buf *buf, e_tag_type type)
 
 sw buf_inspect_tag_type_size (e_tag_type type)
 {
-  const s8 *s;
+  const char *s;
   s = tag_type_to_string(type);
   if (! s)
     return -1;
diff --git a/libc3/buf_parse.c b/libc3/buf_parse.c
index 17f5158..5eb0907 100644
--- a/libc3/buf_parse.c
+++ b/libc3/buf_parse.c
@@ -1537,7 +1537,7 @@ sw buf_parse_ident (s_buf *buf, s_ident *dest)
   sw result = 0;
   s_buf_save save;
   s_str str;
-  s8 t[IDENT_MAX];
+  char t[IDENT_MAX];
   s_buf tmp;
   assert(buf);
   assert(dest);
@@ -2420,8 +2420,8 @@ sw buf_parse_str (s_buf *buf, s_str *dest)
 {
   u8 b;
   character c;
-  s8 *end = "\"";
-  s8 *end1 = NULL;
+  char *end = "\"";
+  char *end1 = NULL;
   sw r;
   sw result = 0;
   s_buf_save save;
@@ -2727,7 +2727,7 @@ sw buf_parse_sym (s_buf *buf, const s_sym **dest)
   sw result = 0;
   s_buf_save save;
   s_str str;
-  s8 t[SYM_MAX];
+  char t[SYM_MAX];
   s_buf tmp;
   assert(buf);
   assert(dest);
@@ -2803,7 +2803,7 @@ sw buf_parse_sym_str (s_buf *buf, s_str *str)
   sw r;
   sw result = 0;
   s_buf_save save;
-  s8 t[SYM_MAX];
+  char t[SYM_MAX];
   s_buf tmp;
   buf_save_init(buf, &save);
   buf_init(&tmp, false, sizeof(t), t);
diff --git a/libc3/c3.c b/libc3/c3.c
index 2f170dd..0c6ee99 100644
--- a/libc3/c3.c
+++ b/libc3/c3.c
@@ -53,7 +53,7 @@ uw * c3_facts_next_id (uw *dest)
   return dest;
 }
 
-s_env * c3_init (s_env *env, int argc, s8 **argv)
+s_env * c3_init (s_env *env, int argc, char **argv)
 {
   if (! env)
     env = &g_c3_env;
diff --git a/libc3/c3_main.h b/libc3/c3_main.h
index 12d3ed7..a4f016c 100644
--- a/libc3/c3_main.h
+++ b/libc3/c3_main.h
@@ -22,11 +22,11 @@ extern const s_str g_c3_base_octal;
 extern const s_str g_c3_base_decimal;
 extern const s_str g_c3_base_hexadecimal;
 extern const s_str g_c3_bases_hexadecimal[2];
-extern const s8   *g_c3_license;
+extern const char *g_c3_license;
 extern sw          g_c3_exit_code;
 
 /* stack-allocation compatible functions */
-s_env * c3_init (s_env *env, int argc, s8 **argv);
+s_env * c3_init (s_env *env, int argc, char **argv);
 void c3_clean (s_env *env);
 
 /* debug */
diff --git a/libc3/call.c b/libc3/call.c
index 7ed5948..a8f9ee7 100644
--- a/libc3/call.c
+++ b/libc3/call.c
@@ -66,9 +66,9 @@ bool call_get (s_call *call, s_facts *facts)
       ! facts_find_fact_by_tags(facts, &tag_module_name,
                                 &tag_operator, &tag_ident)) {
     err_write_1("call_get: symbol ");
-    err_write_1(call->ident.sym->str.ptr.ps8);
+    err_write_1(call->ident.sym->str.ptr.pchar);
     err_write_1(" not found in module ");
-    err_write_1(call->ident.module->str.ptr.ps8);
+    err_write_1(call->ident.module->str.ptr.pchar);
     err_write_1("\n");
     return false;
   }
@@ -78,9 +78,9 @@ bool call_get (s_call *call, s_facts *facts)
       call->fn = fn_new_copy(&tag_var.data.fn);
     else {
       err_write_1("call_get: ");
-      err_write_1(call->ident.module->str.ptr.ps8);
+      err_write_1(call->ident.module->str.ptr.pchar);
       err_write_1(".");
-      err_write_1(call->ident.sym->str.ptr.ps8);
+      err_write_1(call->ident.sym->str.ptr.pchar);
       err_puts(" is not a function");
       return false;
     }
@@ -92,9 +92,9 @@ bool call_get (s_call *call, s_facts *facts)
       call->cfn = cfn_new_copy(&tag_var.data.cfn);
     else {
       err_write_1("call_get: ");
-      err_write_1(call->ident.module->str.ptr.ps8);
+      err_write_1(call->ident.module->str.ptr.pchar);
       err_write_1(".");
-      err_write_1(call->ident.sym->str.ptr.ps8);
+      err_write_1(call->ident.sym->str.ptr.pchar);
       err_puts(" is not a C function");
       return false;
     }
@@ -146,9 +146,9 @@ bool call_op_get (s_call *call, s_facts *facts)
       NULL, NULL });
   if (! facts_with_cursor_next(&cursor)) {
     err_write_1("call_get: symbol ");
-    err_write_1(call->ident.sym->str.ptr.ps8);
+    err_write_1(call->ident.sym->str.ptr.pchar);
     err_write_1(" not found in module ");
-    err_write_1(call->ident.module->str.ptr.ps8);
+    err_write_1(call->ident.module->str.ptr.pchar);
     err_write_1("\n");
     facts_with_cursor_clean(&cursor);
     return false;
@@ -160,9 +160,9 @@ bool call_op_get (s_call *call, s_facts *facts)
   if (facts_with_cursor_next(&cursor)) {
     if (tag_var.type != TAG_FN) {
       err_write_1("call_get: ");
-      err_write_1(call->ident.module->str.ptr.ps8);
+      err_write_1(call->ident.module->str.ptr.pchar);
       err_write_1(".");
-      err_write_1(call->ident.sym->str.ptr.ps8);
+      err_write_1(call->ident.sym->str.ptr.pchar);
       err_puts(" is not a function");
       facts_with_cursor_clean(&cursor);
       return false;
@@ -176,9 +176,9 @@ bool call_op_get (s_call *call, s_facts *facts)
   if (facts_with_cursor_next(&cursor)) {
     if (tag_var.type != TAG_CFN) {
       err_write_1("call_get: ");
-      err_write_1(call->ident.module->str.ptr.ps8);
+      err_write_1(call->ident.module->str.ptr.pchar);
       err_write_1(".");
-      err_write_1(call->ident.sym->str.ptr.ps8);
+      err_write_1(call->ident.sym->str.ptr.pchar);
       err_puts(" is not a C function");
       facts_with_cursor_clean(&cursor);
       return false;
@@ -214,13 +214,13 @@ s_call * call_init (s_call *call)
   return call;
 }
 
-s_call * call_init_1 (s_call *call, const s8 *p)
+s_call * call_init_1 (s_call *call, const char *p)
 {
   s_buf buf;
   uw len;
   sw r;
   len = strlen(p);
-  buf_init(&buf, false, len, (s8 *) p);
+  buf_init(&buf, false, len, (char *) p);
   buf.wpos = len;
   r = buf_parse_call(&buf, call);
   if (r < 0 || (uw) r != len) {
diff --git a/libc3/call.h b/libc3/call.h
index ddd91aa..b21ed9a 100644
--- a/libc3/call.h
+++ b/libc3/call.h
@@ -18,7 +18,7 @@
 /* Stack-allocation compatible functions */
 void     call_clean (s_call *call);
 s_call * call_init (s_call *call);
-s_call * call_init_1 (s_call *call, const s8 *p);
+s_call * call_init_1 (s_call *call, const char *p);
 s_call * call_init_cast (s_call *call, const s_tag *tag);
 s_call * call_init_copy (s_call *call, const s_call *src);
 s_call * call_init_op (s_call *call);
diff --git a/libc3/cfn.c b/libc3/cfn.c
index 2c6d20b..75b4468 100644
--- a/libc3/cfn.c
+++ b/libc3/cfn.c
@@ -209,8 +209,8 @@ s_cfn * cfn_init_cast (s_cfn *cfn, const s_tag *tag)
 s_cfn * cfn_link (s_cfn *cfn)
 {
   assert(cfn);
-  if (! (cfn->ptr.p = dlsym(RTLD_DEFAULT, cfn->name->str.ptr.ps8))) {
-    warnx("cfn_link: %s: %s", cfn->name->str.ptr.ps8, dlerror());
+  if (! (cfn->ptr.p = dlsym(RTLD_DEFAULT, cfn->name->str.ptr.pchar))) {
+    warnx("cfn_link: %s: %s", cfn->name->str.ptr.pchar, dlerror());
     assert(! "cfn_link: dlsym failed");
     return NULL;
   }
@@ -290,7 +290,7 @@ s_tag * cfn_tag_init (s_tag *tag, const s_sym *type)
   assert(type);
   if (! sym_to_tag_type(type, &tmp.type)) {
     err_write_1("cfn_tag_init: invalid type: ");
-    err_puts(type->str.ptr.ps8);
+    err_puts(type->str.ptr.pchar);
     assert(! "cfn_tag_init: invalid type");
     return NULL;
   }
diff --git a/libc3/character.c b/libc3/character.c
index 0290562..d70286b 100644
--- a/libc3/character.c
+++ b/libc3/character.c
@@ -17,7 +17,7 @@
 #include "tag_type.h"
 #include "ucd.h"
 
-character character_1 (const s8 *p)
+character character_1 (const char *p)
 {
   character c;
   s_str stra;
@@ -71,8 +71,7 @@ bool character_is_digit (character c)
 
 bool character_is_lowercase (character c)
 {
-  return (c >= 0 &&
-          c < UCD_MAX &&
+  return (c < UCD_MAX &&
           g_ucd[c].flags & UCD_LETTER_LOWERCASE);
 }
 
@@ -80,30 +79,26 @@ bool character_is_printable (character c)
 {
   const u64 ucd_printable = UCD_LETTER | UCD_MARK | UCD_NUMBER |
     UCD_PUNCTUATION | UCD_SYMBOL | UCD_SEPARATOR_SPACE;
-  return (c >= 0 &&
-          c < UCD_MAX &&
+  return (c < UCD_MAX &&
           g_ucd[c].flags & ucd_printable);
 }
 
 bool character_is_space (character c)
 {
-  return (c >= 0 &&
-          c < UCD_MAX &&
+  return (c < UCD_MAX &&
           g_ucd[c].flags & (UCD_OTHER_CONTROL | UCD_SEPARATOR_SPACE));
 }
 
 bool character_is_uppercase (character c)
 {
-  return (c >= 0 &&
-          c < UCD_MAX &&
+  return (c < UCD_MAX &&
           g_ucd[c].flags & UCD_LETTER_UPPERCASE);
 }
 
 character character_switch_case (character c)
 {
   character s;
-  if (c >= 0 &&
-      c < UCD_MAX &&
+  if (c < UCD_MAX &&
       (s = g_ucd[c].to_lower | g_ucd[c].to_upper))
     return s;
   return c;
@@ -111,8 +106,7 @@ character character_switch_case (character c)
 
 character character_to_lower (character c)
 {
-  if (c >= 0 &&
-      c < UCD_MAX &&
+  if (c < UCD_MAX &&
       g_ucd[c].to_lower)
     return g_ucd[c].to_lower;
   return c;
@@ -120,14 +114,13 @@ character character_to_lower (character c)
 
 character character_to_upper (character c)
 {
-  if (c >= 0 &&
-      c < UCD_MAX &&
+  if (c < UCD_MAX &&
       g_ucd[c].to_upper)
     return g_ucd[c].to_upper;
   return c;
 }
 
-sw character_utf8 (character c, s8 *dest)
+sw character_utf8 (character c, char *dest)
 {
   const u8 _00000111 = 0x07;
   const u8 _00001111 = 0x0F;
@@ -137,24 +130,22 @@ sw character_utf8 (character c, s8 *dest)
   const u8 _11000000 = 0xC0;
   const u8 _11100000 = 0xE0;
   const u8 _11110000 = 0xF0;
-  if (c == -1)
-    return -1;
-  if (((u64) c) < 0x80) {
+  if (c < 0x80) {
     dest[0] = (s8) c;
     return 1;
   }
-  if (((u64) c) < 0x800) {
+  if (c < 0x800) {
     dest[0] = _11000000 | ((c >> 6) & _00011111);
     dest[1] = _10000000 | ( c       & _00111111);
     return 2;
   }
-  if (((u64) c) < 0x10000) {
+  if (c < 0x10000) {
     dest[0] = _11100000 | ((c >> 12) & _00001111);
     dest[1] = _10000000 | ((c >>  6) & _00111111);
     dest[2] = _10000000 | ( c        & _00111111);
     return 3;
   }
-  if (((u64) c) < 0x110000) {
+  if (c < 0x110000) {
     dest[0] = _11110000 | ((c >> 18) & _00000111);
     dest[1] = _10000000 | ((c >> 12) & _00111111);
     dest[2] = _10000000 | ((c >>  6) & _00111111);
@@ -166,15 +157,13 @@ sw character_utf8 (character c, s8 *dest)
 
 sw character_utf8_size (character c)
 {
-  if (c == -1)
-    return -1;
-  if (((u64) c) < 0x80)
+  if (c < 0x80)
     return 1;
-  if (((u64) c) < 0x800)
+  if (c < 0x800)
     return 2;
-  if (((u64) c) < 0x10000)
+  if (c < 0x10000)
     return 3;
-  if (((u64) c) < 0x110000)
+  if (c < 0x110000)
     return 4;
   return -1;
 }
diff --git a/libc3/character.h b/libc3/character.h
index c52abdd..b8b01ed 100644
--- a/libc3/character.h
+++ b/libc3/character.h
@@ -16,7 +16,7 @@
 #include "hash.h"
 #include "types.h"
 
-character   character_1 (const s8 *p);
+character   character_1 (const char *p);
 void        character_hash_update (character c, t_hash *hash);
 character * character_init_cast (character *c, const s_tag *tag);
 character * character_init_copy (character *c, const character *src);
@@ -30,7 +30,7 @@ character   character_switch_case (character c);
 character   character_to_lower (character c);
 character   character_to_upper (character c);
 sw          character_write (s_buf *buf, character c);
-sw          character_utf8 (character c, s8 *dest);
+sw          character_utf8 (character c, char *dest);
 sw          character_utf8_size (character c);
 
 #endif /* LIBC3_CHARACTER_H */
diff --git a/libc3/env.c b/libc3/env.c
index 9befcef..e00d950 100644
--- a/libc3/env.c
+++ b/libc3/env.c
@@ -51,7 +51,7 @@
 
 s_env g_c3_env;
 
-static s_env * env_init_args (s_env *env, int argc, s8 **argv);
+static s_env * env_init_args (s_env *env, int argc, char **argv);
 
 void env_clean (s_env *env)
 {
@@ -180,8 +180,8 @@ bool env_eval_call (s_env *env, const s_call *call, s_tag *dest)
     result = env_eval_call_fn(env, &c, dest);
   else {
     warnx("env_eval_call: could not resolve call %s.%s.",
-          c.ident.module->str.ptr.ps8,
-          c.ident.sym->str.ptr.ps8);
+          c.ident.module->str.ptr.pchar,
+          c.ident.sym->str.ptr.pchar);
     result = false;
   }
   call_clean(&c);
@@ -375,8 +375,8 @@ bool env_eval_equal_tag (s_env *env, const s_tag *a, const s_tag *b,
   is_unbound_b = b->type == TAG_IDENT;
   if (is_unbound_a && is_unbound_b) {
     warnx("unbound equal on both sides: %s = %s",
-          a->data.ident.sym->str.ptr.ps8,
-          b->data.ident.sym->str.ptr.ps8);
+          a->data.ident.sym->str.ptr.pchar,
+          b->data.ident.sym->str.ptr.pchar);
     return false;
   }
   if (is_unbound_a) {
@@ -578,8 +578,8 @@ bool env_eval_ident (s_env *env, const s_ident *ident, s_tag *dest)
   if (! ((tag = frame_get(env->frame, tmp_ident.sym)) ||
          (tag = ident_get(&tmp_ident, &env->facts, &tmp)))) {
     warnx("unbound ident: %s.%s",
-          tmp_ident.module->str.ptr.ps8,
-          tmp_ident.sym->str.ptr.ps8);
+          tmp_ident.module->str.ptr.pchar,
+          tmp_ident.sym->str.ptr.pchar);
     return false;
   }
   tag_init_copy(dest, tag);
@@ -699,7 +699,7 @@ bool env_eval_struct (s_env *env, const s_struct *s, s_tag *dest)
         warnx("env_eval_struct:"
               " invalid type %s for key %s, expected %s.",
               tag_type_to_string(tag.type),
-              t->type->map.key[i].data.sym->str.ptr.ps8,
+              t->type->map.key[i].data.sym->str.ptr.pchar,
               tag_type_to_string(t->type->map.value[i].type));
         goto ko_tag;
       }
@@ -841,7 +841,7 @@ s_list ** env_get_struct_type_spec (s_env *env,
       ! list_is_plist(tmp.data.list)) {
     warnx("env_get_struct_type_spec: module %s"
           " has a defstruct that is not a property list",
-          module->str.ptr.ps8);
+          module->str.ptr.pchar);
     tag_clean(&tmp);
     return NULL;
   }
@@ -849,7 +849,7 @@ s_list ** env_get_struct_type_spec (s_env *env,
   return dest;
 }
 
-s_env * env_init (s_env *env, int argc, s8 **argv)
+s_env * env_init (s_env *env, int argc, char **argv)
 {
   s_str path;
   assert(env);
@@ -887,9 +887,9 @@ s_env * env_init (s_env *env, int argc, s8 **argv)
   return env;
 }
 
-s_env * env_init_args (s_env *env, int argc, s8 **argv)
+s_env * env_init_args (s_env *env, int argc, char **argv)
 {
-  s8 a[PATH_MAX];
+  char a[PATH_MAX];
   s_str argv0;
   s_buf buf;
   s_str dir;
@@ -946,13 +946,13 @@ bool env_module_load (s_env *env, const s_sym *module, s_facts *facts)
   assert(facts);
   if (! module_path(module, &env->module_path, &path)) {
     warnx("env_module_load: %s: module_path",
-          module->str.ptr.ps8);
+          module->str.ptr.pchar);
     return false;
   }
   tag_init_time(&tag_time);
   if (facts_load_file(facts, &path) < 0) {
     warnx("env_module_load: %s: facts_load_file",
-          path.ptr.ps8);
+          path.ptr.pchar);
     str_clean(&path);
     return false;
   }
@@ -1017,8 +1017,8 @@ s8 env_operator_arity (s_env *env, const s_ident *op)
   else
     warnx("env_operator_arity: "
           "arity for operator %s not found in module %s",
-          op->sym->str.ptr.ps8,
-          op->module->str.ptr.ps8);
+          op->sym->str.ptr.pchar,
+          op->module->str.ptr.pchar);
   facts_cursor_clean(&cursor);
   return r;
 }
@@ -1086,8 +1086,8 @@ s8 env_operator_precedence (s_env *env, const s_ident *op)
   else
     warnx("env_operator_precedence: "
           "precedence for operator %s not found in module %s",
-          op->sym->str.ptr.ps8,
-          op->module->str.ptr.ps8);
+          op->sym->str.ptr.pchar,
+          op->module->str.ptr.pchar);
   facts_cursor_clean(&cursor);
   return r;
 }
@@ -1132,9 +1132,9 @@ s_ident * env_operator_resolve (s_env *env, const s_ident *op,
   }
   if (false)
     warnx("env_operator_resolve: operator %s/%d not found in module %s",
-          tmp.sym->str.ptr.ps8,
+          tmp.sym->str.ptr.pchar,
           arity,
-          tmp.module->str.ptr.ps8);
+          tmp.module->str.ptr.pchar);
   facts_with_cursor_clean(&cursor);
   return NULL;
 }
@@ -1159,8 +1159,8 @@ const s_sym * env_operator_symbol (s_env *env, const s_ident *op)
   else
     warnx("env_operator_symbol: "
           "symbol for operator %s not found in module %s",
-          op->sym->str.ptr.ps8,
-          op->module->str.ptr.ps8);
+          op->sym->str.ptr.pchar,
+          op->module->str.ptr.pchar);
   facts_cursor_clean(&cursor);
   return r;
 }
diff --git a/libc3/env.h b/libc3/env.h
index 627a8d9..377daa0 100644
--- a/libc3/env.h
+++ b/libc3/env.h
@@ -19,7 +19,7 @@ extern s_env g_c3_env;
 
 /* Stack allocation compatible functions, call env_clean after use. */
 void    env_clean (s_env *env);
-s_env * env_init (s_env *env, int argc, s8 **argv);
+s_env * env_init (s_env *env, int argc, char **argv);
 
 /* Operators. */
 bool          env_eval_array (s_env *env, const s_array *array,
diff --git a/libc3/facts.c b/libc3/facts.c
index ac20b22..9cc3304 100644
--- a/libc3/facts.c
+++ b/libc3/facts.c
@@ -165,9 +165,9 @@ sw facts_dump (s_facts *facts, s_buf *buf)
   return r;
 }
 
-sw facts_dump_file (s_facts *facts, const s8 *path)
+sw facts_dump_file (s_facts *facts, const char *path)
 {
-  s8 b[BUF_SIZE];
+  char b[BUF_SIZE];
   s_buf buf;
   FILE *fp;
   sw r;
@@ -293,12 +293,12 @@ sw facts_load (s_facts *facts, s_buf *buf, const s_str *path)
   return result;
  ko_header:
   warnx("facts_load: %s: invalid or missing header",
-        path->ptr.ps8);
+        path->ptr.pchar);
   return -1;
  ko_fact:
   facts_lock_unlock_w(facts);
   warnx("facts_load: %s: %s fact line %lu",
-        path->ptr.ps8,
+        path->ptr.pchar,
         r ? "invalid" : "missing",
         (unsigned long) line);
   return -1;
@@ -306,15 +306,15 @@ sw facts_load (s_facts *facts, s_buf *buf, const s_str *path)
 
 sw facts_load_file (s_facts *facts, const s_str *path)
 {
-  s8 b[BUF_SIZE];
+  char b[BUF_SIZE];
   s_buf buf;
   FILE *fp;
   sw result;
   assert(facts);
   assert(path);
   buf_init(&buf, false, sizeof(b), b);
-  if (! (fp = fopen(path->ptr.ps8, "rb"))) {
-    warn("facts_load_file: %s", path->ptr.ps8);
+  if (! (fp = fopen(path->ptr.pchar, "rb"))) {
+    warn("facts_load_file: %s", path->ptr.pchar);
     return -1;
   }
   buf_file_open_r(&buf, fp);
@@ -445,12 +445,12 @@ sw facts_open_buf (s_facts *facts, s_buf *buf, const s_str *path)
 sw facts_open_file (s_facts *facts, const s_str *path)
 {
   FILE *fp;
-  s8 i[BUF_SIZE];
+  char i[BUF_SIZE];
   s_buf in;
   sw r;
   sw result = 0;
   buf_init(&in, false, sizeof(i), i);
-  if (! (fp = fopen(path->ptr.ps8, "rb"))) {
+  if (! (fp = fopen(path->ptr.pchar, "rb"))) {
     if (errno == ENOENT)
       return facts_open_file_create(facts, path);
     return -1;
@@ -460,8 +460,8 @@ sw facts_open_file (s_facts *facts, const s_str *path)
     return r;
   result += r;
   buf_file_close(&in);
-  if (! (fp = fopen(path->ptr.ps8, "ab"))) {
-    warn("facts_open_file: fopen: %s", path->ptr.ps8);
+  if (! (fp = fopen(path->ptr.pchar, "ab"))) {
+    warn("facts_open_file: fopen: %s", path->ptr.pchar);
     return -1;
   }
   if (! (facts->log = log_new()))
@@ -476,8 +476,8 @@ sw facts_open_file_create (s_facts *facts, const s_str *path)
   s_buf *out;
   sw r;
   sw result = 0;
-  if (! (fp = fopen(path->ptr.ps8, "wb"))) {
-    warn("facts_open_file_create: fopen: %s", path->ptr.ps8);
+  if (! (fp = fopen(path->ptr.pchar, "wb"))) {
+    warn("facts_open_file_create: fopen: %s", path->ptr.pchar);
     return -1;
   }
   if (facts_count(facts)) {
@@ -647,9 +647,9 @@ s_fact * facts_replace_tags (s_facts *facts, const s_tag *subject,
   return f;
 }
 
-sw facts_save_file (s_facts *facts, const s8 *path)
+sw facts_save_file (s_facts *facts, const char *path)
 {
-  s8 b[BUF_SIZE];
+  char b[BUF_SIZE];
   s_buf buf;
   FILE *fp;
   sw r;
diff --git a/libc3/facts.h b/libc3/facts.h
index bf36889..e76695e 100644
--- a/libc3/facts.h
+++ b/libc3/facts.h
@@ -51,12 +51,12 @@ s_fact * facts_replace_fact (s_facts *facts, const s_fact *fact);
 s_fact * facts_replace_tags (s_facts *facts, const s_tag *subject,
                              const s_tag *predicate,
                              const s_tag *object);
-sw       facts_save_file (s_facts *facts, const s8 *path);
+sw       facts_save_file (s_facts *facts, const char *path);
 bool     facts_unref_tag (s_facts *facts, const s_tag *tag);
 
 /* Observers */
 sw       facts_dump (s_facts *facts, s_buf *buf);
-sw       facts_dump_file (s_facts *facts, const s8 *path);
+sw       facts_dump_file (s_facts *facts, const char *path);
 s_fact * facts_find_fact (s_facts *facts, const s_fact *fact);
 s_fact * facts_find_fact_by_tags (s_facts *facts, const s_tag *subject,
                                   const s_tag *predicate,
diff --git a/libc3/file.c b/libc3/file.c
index bb64ea2..4d37d85 100644
--- a/libc3/file.c
+++ b/libc3/file.c
@@ -51,16 +51,16 @@ bool * file_access (const s_str *path, const s_sym *mode,
     m = X_OK;
   else
     m = F_OK;
-  *dest = access(path->ptr.ps8, m) ? false : true;
+  *dest = access(path->ptr.pchar, m) ? false : true;
   return dest;
 }
 
 sw file_copy_1 (const char *from, const char *to)
 {
-  s8 buf[4096];
+  char buf[4096];
   sw fd_from = -1;
   sw fd_to = -1;
-  s8 *out;
+  char *out;
   sw r;
   sw saved_errno;
   sw w;
@@ -117,8 +117,8 @@ s_tag * file_mtime (const s_str *path, s_tag *dest)
   struct stat sb;
   assert(path);
   assert(dest);
-  if (stat(path->ptr.ps8, &sb)) {
-    warn("file_mtime: %s", path->ptr.ps8);
+  if (stat(path->ptr.pchar, &sb)) {
+    warn("file_mtime: %s", path->ptr.pchar);
     return NULL;
   }
 #if HAVE_STAT_MTIM
@@ -135,7 +135,7 @@ s_str * file_search (const s_str *suffix, const s_sym *mode,
                      s_str *dest)
 {
   bool access;
-  s8 buf_s[PATH_MAX];
+  char buf_s[PATH_MAX];
   s_buf buf;
   const s_list *path;
   sw r;
@@ -153,7 +153,7 @@ s_str * file_search (const s_str *suffix, const s_sym *mode,
       buf_save_restore_wpos(&buf, &save);
       str = &path->tag.data.str;
       if ((r = buf_write_str(&buf, str)) < 0 ||
-          (str->ptr.ps8[str->size - 1] != '/' &&
+          (str->ptr.pchar[str->size - 1] != '/' &&
            (r = buf_write_1(&buf, "/")) < 0) ||
           (r = buf_write_str(&buf, suffix)) < 0)
         return NULL;
diff --git a/libc3/fn.c b/libc3/fn.c
index 26d7040..56eb224 100644
--- a/libc3/fn.c
+++ b/libc3/fn.c
@@ -43,7 +43,7 @@ s_fn * fn_init (s_fn *fn)
   return fn;
 }
 
-s_fn * fn_init_1 (s_fn *fn, s8 *p)
+s_fn * fn_init_1 (s_fn *fn, char *p)
 {
   s_buf buf;
   uw len;
@@ -51,7 +51,7 @@ s_fn * fn_init_1 (s_fn *fn, s8 *p)
   assert(fn);
   assert(p);
   len = strlen(p);
-  buf_init(&buf, false, len, (s8 *) p);
+  buf_init(&buf, false, len, (char *) p);
   buf.wpos = len;
   r = buf_parse_fn(&buf, fn);
   if (r < 0 || (uw) r != len)
diff --git a/libc3/fn.h b/libc3/fn.h
index fe4328e..4ee482c 100644
--- a/libc3/fn.h
+++ b/libc3/fn.h
@@ -24,7 +24,7 @@
 /* Stack-allocation compatible functions, call fn_clean after use. */
 void   fn_clean (s_fn *fn);
 s_fn * fn_init (s_fn *fn);
-s_fn * fn_init_1 (s_fn *fn, s8 *p);
+s_fn * fn_init_1 (s_fn *fn, char *p);
 s_fn * fn_init_cast (s_fn *fn, const s_tag *tag);
 s_fn * fn_init_copy (s_fn *fn, const s_fn *src);
 
diff --git a/libc3/hash.c b/libc3/hash.c
index a7ea0cb..2db14ba 100644
--- a/libc3/hash.c
+++ b/libc3/hash.c
@@ -24,7 +24,7 @@
 #define HASH_UPDATE_DEF(type)                                          \
   bool hash_update_##type (t_hash *hash, const type *x)                \
   {                                                                    \
-    const s8 t[] = #type;                                              \
+    const char t[] = #type;                                              \
     assert(hash);                                                      \
     assert(x);                                                         \
     return hash_update(hash, t, sizeof(t)) &&                          \
@@ -64,10 +64,10 @@ bool hash_update (t_hash *hash, const void *data, uw size)
   return true;
 }
 
-bool hash_update_1 (t_hash *hash, const s8 *p)
+bool hash_update_1 (t_hash *hash, const char *p)
 {
   uw len;
-  const s8 type[] = "s8*";
+  const char type[] = "s8*";
   assert(hash);
   assert(p);
   len = strlen(p);
@@ -79,7 +79,7 @@ bool hash_update_1 (t_hash *hash, const s8 *p)
 bool hash_update_array (t_hash *hash, const s_array *a)
 {
   uw i = 0;
-  const s8 type[] = "array";
+  const char type[] = "array";
   assert(hash);
   assert(a);
   if (! hash_update(hash, type, sizeof(type)) ||
@@ -110,7 +110,7 @@ bool hash_update_array (t_hash *hash, const s_array *a)
 bool hash_update_bool (t_hash *hash, const bool *x)
 {
   bool b;
-  const s8 type[] = "bool";
+  const char type[] = "bool";
   assert(hash);
   assert(x);
   b = x ? 1 : 0;
@@ -120,7 +120,7 @@ bool hash_update_bool (t_hash *hash, const bool *x)
 
 bool hash_update_call (t_hash *hash, const s_call *call)
 {
-  const s8 type[] = "call";
+  const char type[] = "call";
   assert(hash);
   assert(call);
   return hash_update(hash, type, sizeof(type)) &&
@@ -130,7 +130,7 @@ bool hash_update_call (t_hash *hash, const s_call *call)
 
 bool hash_update_cfn (t_hash *hash, const s_cfn *cfn)
 {
-  const s8 type[] = "cfn";
+  const char type[] = "cfn";
   assert(hash);
   assert(cfn);
   return hash_update(hash, type, sizeof(type)) &&
@@ -138,15 +138,14 @@ bool hash_update_cfn (t_hash *hash, const s_cfn *cfn)
     hash_update_list(hash, (const s_list * const *) &cfn->arg_types);
 }
 
+HASH_UPDATE_DEF(char)
 HASH_UPDATE_DEF(character)
-
 HASH_UPDATE_DEF(f32)
-
 HASH_UPDATE_DEF(f64)
 
 bool hash_update_fact (t_hash *hash, const s_fact *fact)
 {
-  const s8 type[] = "fact";
+  const char type[] = "fact";
   assert(hash);
   assert(fact);
   assert(fact->subject);
@@ -160,7 +159,7 @@ bool hash_update_fact (t_hash *hash, const s_fact *fact)
 
 bool hash_update_fn (t_hash *hash, const s_fn *fn)
 {
-  const s8 type[] = "fn";
+  const char type[] = "fn";
   assert(hash);
   assert(fn);
   return hash_update(hash, type, sizeof(type)) &&
@@ -173,7 +172,7 @@ bool hash_update_fn_clauses (t_hash *hash, const s_fn_clause *clauses)
 {
   uw count = 0;
   const s_fn_clause *f;
-  const s8 type[] = "fn_clauses";
+  const char type[] = "fn_clauses";
   assert(hash);
   assert(clauses);
   if (! hash_update(hash, type, sizeof(type)))
@@ -199,14 +198,14 @@ bool hash_update_fn_clauses (t_hash *hash, const s_fn_clause *clauses)
 
 bool hash_update_ident (t_hash *hash, const s_ident *ident)
 {
-  const s8 type[] = "ident";
+  const char type[] = "ident";
   assert(hash);
   assert(ident);
   if (! hash_update(hash, type, sizeof(type)))
     return false;
   if (ident->module) {
     if (! hash_update_sym(hash, &ident->module) ||
-        ! hash_update_s8(hash, "."))
+        ! hash_update_char(hash, "."))
       return false;
   }
   return hash_update_sym(hash, &ident->sym);
@@ -216,7 +215,7 @@ bool hash_update_integer (t_hash *hash, const s_integer *i)
 {
   int j = 0;
   mp_digit *digit;
-  const s8 type[] = "integer";
+  const char type[] = "integer";
   assert(hash);
   assert(i);
   digit = i->mp_int.dp;
@@ -238,7 +237,7 @@ bool hash_update_list (t_hash *hash, const s_list * const *list)
   uw count;
   const s_list *l;
   const s_list *last;
-  const s8 type[] = "list";
+  const char type[] = "list";
   assert(hash);
   assert(list);
   l = *list;
@@ -262,7 +261,7 @@ bool hash_update_list (t_hash *hash, const s_list * const *list)
 bool hash_update_map (t_hash *hash, const s_map *map)
 {
   uw i = 0;
-  const s8 type[] = "map";
+  const char type[] = "map";
   assert(hash);
   assert(map);
   if (! hash_update(hash, type, strlen(type)) ||
@@ -279,7 +278,7 @@ bool hash_update_map (t_hash *hash, const s_map *map)
 
 bool hash_update_ptag (t_hash *hash, const p_tag *ptag)
 {
-  const s8 type[] = "ptag";
+  const char type[] = "ptag";
   assert(hash);
   assert(ptag);
   if (! hash_update(hash, type, sizeof(type)))
@@ -289,7 +288,7 @@ bool hash_update_ptag (t_hash *hash, const p_tag *ptag)
 
 bool hash_update_ptr (t_hash *hash, const u_ptr_w *ptr)
 {
-  const s8 type[] = "ptr";
+  const char type[] = "ptr";
   if (! hash_update(hash, type, strlen(type)))
     return false;
   return hash_update(hash, &ptr->p, sizeof(void *));
@@ -297,7 +296,7 @@ bool hash_update_ptr (t_hash *hash, const u_ptr_w *ptr)
 
 bool hash_update_ptr_free (t_hash *hash, const u_ptr_w *ptr_free)
 {
-  const s8 type[] = "ptr_free";
+  const char type[] = "ptr_free";
   if (! hash_update(hash, type, strlen(type)))
     return false;
   return hash_update(hash, &ptr_free->p, sizeof(void *));
@@ -305,25 +304,21 @@ bool hash_update_ptr_free (t_hash *hash, const u_ptr_w *ptr_free)
 
 bool hash_update_quote (t_hash *hash, const s_quote *x)
 {
-  const s8 type[] = "quote";
+  const char type[] = "quote";
   if (! hash_update(hash, type, strlen(type)))
     return false;
   return hash_update_tag(hash, x->tag);
 }
 
 HASH_UPDATE_DEF(s8)
-
 HASH_UPDATE_DEF(s16)
-
 HASH_UPDATE_DEF(s32)
-
 HASH_UPDATE_DEF(s64)
-
 HASH_UPDATE_DEF(sw)
 
 bool hash_update_str (t_hash *hash, const s_str *str)
 {
-  s8 type[] = "str";
+  char type[] = "str";
   assert(hash);
   assert(str);
   return hash_update(hash, type, strlen(type)) &&
@@ -336,7 +331,7 @@ bool hash_update_struct (t_hash *hash, const s_struct *s)
   const void *data;
   uw i = 0;
   const s_sym *sym;
-  s8 type[] = "struct";
+  char type[] = "struct";
   assert(hash);
   assert(s);
   if (! hash_update(hash, type, sizeof(type)) ||
@@ -371,7 +366,7 @@ bool hash_update_struct (t_hash *hash, const s_struct *s)
 bool hash_update_struct_type (t_hash *hash, const s_struct_type *st)
 {
   uw i;
-  s8 type[] = "struct_type";
+  char type[] = "struct_type";
   assert(hash);
   assert(st);
   if (! hash_update(hash, type, strlen(type)) ||
@@ -389,7 +384,7 @@ bool hash_update_struct_type (t_hash *hash, const s_struct_type *st)
 
 bool hash_update_sym (t_hash *hash, const s_sym * const *sym)
 {
-  s8 type[] = "sym";
+  char type[] = "sym";
   assert(hash);
   assert(sym);
   return hash_update(hash, type, sizeof(type)) &&
@@ -399,7 +394,7 @@ bool hash_update_sym (t_hash *hash, const s_sym * const *sym)
 bool hash_update_tag (t_hash *hash, const s_tag *tag)
 {
   u8 tag_type;
-  s8 type[] = "tag";
+  char type[] = "tag";
   assert(hash);
   assert(tag);
   if (! hash_update(hash, type, strlen(type)))
@@ -477,7 +472,7 @@ HASH_UPDATE_DEF(uw)
 
 bool hash_update_var (t_hash *hash, const void *x)
 {
-  s8 type[] = "var";
+  char type[] = "var";
   (void) x;
   assert(hash);
   return hash_update(hash, type, strlen(type));
@@ -485,7 +480,7 @@ bool hash_update_var (t_hash *hash, const void *x)
 
 bool hash_update_void (t_hash *hash, const void *x)
 {
-  s8 type[] = "void";
+  char type[] = "void";
   (void) x;
   assert(hash);
   return hash_update(hash, type, strlen(type));
diff --git a/libc3/hash.h b/libc3/hash.h
index 5b03a3e..eb25614 100644
--- a/libc3/hash.h
+++ b/libc3/hash.h
@@ -23,11 +23,12 @@ void hash_init (t_hash *hash);
 uw   hash_to_uw (t_hash *hash);
 u64  hash_to_u64 (t_hash *hash);
 bool hash_update (t_hash *hash, const void *data, uw size);
-bool hash_update_1 (t_hash *hash, const s8 *p);
+bool hash_update_1 (t_hash *hash, const char *p);
 bool hash_update_array (t_hash *hash, const s_array *a);
 bool hash_update_bool (t_hash *hash, const bool *b);
 bool hash_update_call (t_hash *hash, const s_call *call);
 bool hash_update_cfn (t_hash *hash, const s_cfn *cfn);
+HASH_UPDATE_PROTOTYPE(char);
 HASH_UPDATE_PROTOTYPE(character);
 HASH_UPDATE_PROTOTYPE(f32);
 HASH_UPDATE_PROTOTYPE(f64);
diff --git a/libc3/ident.c b/libc3/ident.c
index 1e043ce..a17ef21 100644
--- a/libc3/ident.c
+++ b/libc3/ident.c
@@ -97,9 +97,9 @@ s_tag * ident_get (const s_ident *ident, s_facts *facts, s_tag *dest)
   if (facts_with_cursor_next(&cursor)) {
     if (tag_var.type != TAG_CFN) {
       err_write_1("call_get: ");
-      err_write_1(module->str.ptr.ps8);
+      err_write_1(module->str.ptr.pchar);
       err_write_1(".");
-      err_write_1(ident->sym->str.ptr.ps8);
+      err_write_1(ident->sym->str.ptr.pchar);
       err_puts(" is not a C function");
       facts_with_cursor_clean(&cursor);
       return NULL;
@@ -113,9 +113,9 @@ s_tag * ident_get (const s_ident *ident, s_facts *facts, s_tag *dest)
     if (facts_with_cursor_next(&cursor)) {
       if (tag_var.type != TAG_FN) {
         err_write_1("call_get: ");
-        err_write_1(module->str.ptr.ps8);
+        err_write_1(module->str.ptr.pchar);
         err_write_1(".");
-        err_write_1(ident->sym->str.ptr.ps8);
+        err_write_1(ident->sym->str.ptr.pchar);
         err_puts(" is not a function");
         facts_with_cursor_clean(&cursor);
         return NULL;
@@ -180,7 +180,7 @@ s_ident * ident_init (s_ident *ident, const s_sym *module,
   return ident;
 }
 
-s_ident * ident_init_1 (s_ident *ident, const s8 *p)
+s_ident * ident_init_1 (s_ident *ident, const char *p)
 {
   s_str tmp;
   str_init_1(&tmp, NULL, p);
diff --git a/libc3/ident.h b/libc3/ident.h
index 0617721..7620e6d 100644
--- a/libc3/ident.h
+++ b/libc3/ident.h
@@ -22,7 +22,7 @@
 /* Stack-allocation compatible functions */
 s_ident * ident_init (s_ident *ident, const s_sym *module,
                       const s_sym *sym);
-s_ident * ident_init_1 (s_ident *ident, const s8 *p);
+s_ident * ident_init_1 (s_ident *ident, const char *p);
 s_ident * ident_init_cast (s_ident *ident, const s_tag *tag);
 s_ident * ident_init_copy (s_ident *ident, const s_ident *src);
 
diff --git a/libc3/integer.c b/libc3/integer.c
index 74da7f4..a47fd1c 100644
--- a/libc3/integer.c
+++ b/libc3/integer.c
@@ -195,12 +195,12 @@ s_integer * integer_init (s_integer *dest)
   return dest;
 }
 
-s_integer * integer_init_1 (s_integer *i, const s8 *p)
+s_integer * integer_init_1 (s_integer *i, const char *p)
 {
   s_buf buf;
   assert(i);
   assert(p);
-  buf_init_1(&buf, false, (s8 *) p);
+  buf_init_1(&buf, false, (char *) p);
   buf_parse_integer(&buf, i);
   return i;
 }
diff --git a/libc3/integer.h b/libc3/integer.h
index 4f82744..bd57266 100644
--- a/libc3/integer.h
+++ b/libc3/integer.h
@@ -27,7 +27,7 @@
 
 /* Stack allocation compatible functions */
 s_integer * integer_init (s_integer *i);
-s_integer * integer_init_1 (s_integer *i, const s8 *p);
+s_integer * integer_init_1 (s_integer *i, const char *p);
 s_integer * integer_init_cast (s_integer *a, const s_tag *tag);
 s_integer * integer_init_copy (s_integer *a, const s_integer *src);
 s_integer * integer_init_f32 (s_integer *a, f32 x);
diff --git a/libc3/io.c b/libc3/io.c
index 059ce3e..615fc7f 100644
--- a/libc3/io.c
+++ b/libc3/io.c
@@ -46,7 +46,7 @@ sw err_inspect (const s_tag *x)
   return err_inspect_tag(x);
 }
 
-sw err_puts (const s8 *x)
+sw err_puts (const char *x)
 {
   sw r;
   sw result = 0;
@@ -60,7 +60,7 @@ sw err_puts (const s8 *x)
   return result;
 }
 
-sw err_write_1 (const s8 *x)
+sw err_write_1 (const char *x)
 {
   sw r;
   if ((r = buf_write_1(&g_c3_env.err, x)) > 0)
@@ -82,7 +82,7 @@ sw io_inspect (const s_tag *x)
   return result;
 }
 
-sw io_puts (const s8 *x)
+sw io_puts (const char *x)
 {
   sw r;
   sw result = 0;
@@ -96,7 +96,7 @@ sw io_puts (const s8 *x)
   return result;
 }
 
-sw io_write_1 (const s8 *x)
+sw io_write_1 (const char *x)
 {
   sw r;
   if ((r = buf_write_1(&g_c3_env.out, x)) > 0)
diff --git a/libc3/io.h b/libc3/io.h
index 71675b8..41b0da7 100644
--- a/libc3/io.h
+++ b/libc3/io.h
@@ -27,13 +27,13 @@
 
 /* error output */
 sw err_inspect (const s_tag *x);
-sw err_puts (const s8 *x);
-sw err_write_1 (const s8 *x);
+sw err_puts (const char *x);
+sw err_write_1 (const char *x);
 
 /* standard output */
 sw io_inspect (const s_tag *x);
-sw io_puts (const s8 *x);
-sw io_write_1 (const s8 *x);
+sw io_puts (const char *x);
+sw io_write_1 (const char *x);
 
 PROTOTYPES_ERR_IO_INSPECT(array,      const s_array *);
 PROTOTYPES_ERR_IO_INSPECT(bool,       const bool *);
diff --git a/libc3/license.c b/libc3/license.c
index 4a58d71..88c2daa 100644
--- a/libc3/license.c
+++ b/libc3/license.c
@@ -12,7 +12,7 @@
  */
 #include "c3_main.h"
 
-const s8 * g_c3_license = "c3\n"
+const char *g_c3_license = "c3\n"
  "Copyright 2022,2023 kmx.io <contact@kmx.io>\n"
  "\n"
  "Permission is hereby granted to use this software granted the above\n"
diff --git a/libc3/list.c b/libc3/list.c
index b7cc567..bac4a82 100644
--- a/libc3/list.c
+++ b/libc3/list.c
@@ -65,7 +65,7 @@ s_list * list_init (s_list *list, s_list *next)
   return list;
 }
 
-s_list * list_init_1 (s_list *list, const s8 *p, s_list *next)
+s_list * list_init_1 (s_list *list, const char *p, s_list *next)
 {
   assert(list);
   tag_init_1(&list->tag, p);
@@ -195,11 +195,11 @@ s_list * list_new (s_list *next)
   return list_init(dest, next);
 }
 
-s_list * list_new_1 (const s8 *p)
+s_list * list_new_1 (const char *p)
 {
   s_buf buf;
   s_list *list;
-  buf_init_1(&buf, false, (s8 *) p);
+  buf_init_1(&buf, false, (char *) p);
   if (buf_parse_list(&buf, &list) != (sw) strlen(p)) {
     assert(! "invalid list");
     return NULL;
diff --git a/libc3/list.h b/libc3/list.h
index 1c6cb5f..27561d1 100644
--- a/libc3/list.h
+++ b/libc3/list.h
@@ -27,24 +27,24 @@
 /* Stack-allocation functions, call list_clean after use. */
 void      list_clean (s_list *list);
 s_list  * list_init (s_list *list, s_list *next);
-s_list  * list_init_1 (s_list *list, const s8 *p, s_list *next);
+s_list  * list_init_1 (s_list *list, const char *p, s_list *next);
 s_list ** list_init_cast (s_list **list, const s_tag *tag);
 s_list ** list_init_copy (s_list **list, const s_list * const *src);
 s_list  * list_init_copy_tag (s_list *list, const s_tag *tag,
                               s_list *next);
-s_list  * list_init_eval (s_list *list, const s8 *p);
+s_list  * list_init_eval (s_list *list, const char *p);
 
 /* Heap-allocation functions, call list_delete after use */
 s_list * list_delete (s_list *list);
 void     list_delete_all (s_list *list);
 void     list_f_clean (s_list **list);
 s_list * list_new (s_list *next);
-s_list * list_new_1 (const s8 *p);
+s_list * list_new_1 (const char *p);
 s_list * list_new_f64 (f64 x, s_list *next);
 s_list * list_new_copy (const s_tag *tag, s_list *next);
 s_list * list_new_list (s_list *list, s_list *next);
 s_list * list_new_map (uw count, s_list *next);
-s_list * list_new_str_1 (s8 *free, const s8 *p, s_list *next);
+s_list * list_new_str_1 (char *free, const char *p, s_list *next);
 
 /* Observers */
 s_list ** list_cast (const s_tag *tag, s_list **list);
diff --git a/libc3/list_init.c b/libc3/list_init.c
index aef37cf..9e407fd 100644
--- a/libc3/list_init.c
+++ b/libc3/list_init.c
@@ -118,7 +118,7 @@ s_list * list_init_ident (s_list *list, const s_ident *ident,
   return list;
 }
 
-s_list * list_init_ident_1 (s_list *list, const s8 *p, s_list *next)
+s_list * list_init_ident_1 (s_list *list, const char *p, s_list *next)
 {
   s_list tmp;
   assert(list);
@@ -129,7 +129,7 @@ s_list * list_init_ident_1 (s_list *list, const s8 *p, s_list *next)
   return list;
 }
 
-s_list * list_init_integer_1 (s_list *list, const s8 *p, s_list *next)
+s_list * list_init_integer_1 (s_list *list, const char *p, s_list *next)
 {
   s_list tmp;
   assert(list);
@@ -174,7 +174,7 @@ s_list * list_init_map (s_list *list, uw count, s_list *next)
   return list;
 }
 
-s_list * list_init_map_1 (s_list *list, const s8 *p, s_list *next)
+s_list * list_init_map_1 (s_list *list, const char *p, s_list *next)
 {
   s_list tmp;
   assert(list);
@@ -251,8 +251,8 @@ s_list * list_init_s64 (s_list *list, s64 i, s_list *next)
   return list;
 }
 
-s_list * list_init_str (s_list *list, s8 *p_free, uw size, const s8 *p, 
-                        s_list *next)
+s_list * list_init_str (s_list *list, char *p_free, uw size, 
+                        const char *p, s_list *next)
 {
   s_list tmp;
   assert(list);
@@ -263,7 +263,7 @@ s_list * list_init_str (s_list *list, s8 *p_free, uw size, const s8 *p,
   return list;
 }
 
-s_list * list_init_str_1 (s_list *list, s8 *p_free, const s8 *p, 
+s_list * list_init_str_1 (s_list *list, char *p_free, const char *p, 
                           s_list *next)
 {
   s_list tmp;
@@ -322,7 +322,7 @@ s_list * list_init_sym (s_list *list, const s_sym *sym, s_list *next)
   return list;
 }
 
-s_list * list_init_sym_1 (s_list *list, const s8 *p, s_list *next)
+s_list * list_init_sym_1 (s_list *list, const char *p, s_list *next)
 {
   s_list tmp;
   assert(list);
@@ -525,7 +525,7 @@ s_list * list_new_ident (const s_ident *ident, s_list *next)
   return list;
 }
 
-s_list * list_new_ident_1 (const s8 *p, s_list *next)
+s_list * list_new_ident_1 (const char *p, s_list *next)
 {
   s_list *list;
   list = list_new(next);
@@ -538,7 +538,7 @@ s_list * list_new_ident_1 (const s8 *p, s_list *next)
   return list;
 }
 
-s_list * list_new_integer_1 (const s8 *p, s_list *next)
+s_list * list_new_integer_1 (const char *p, s_list *next)
 {
   s_list *list;
   list = list_new(next);
@@ -590,7 +590,7 @@ s_list * list_new_map (uw count, s_list *next)
   return list;
 }
 
-s_list * list_new_map_1 (const s8 *p, s_list *next)
+s_list * list_new_map_1 (const char *p, s_list *next)
 {
   s_list *list;
   list = list_new(next);
@@ -681,7 +681,8 @@ s_list * list_new_s64 (s64 i, s_list *next)
   return list;
 }
 
-s_list * list_new_str (s8 *p_free, uw size, const s8 *p, s_list *next)
+s_list * list_new_str (char *p_free, uw size, const char *p, 
+                       s_list *next)
 {
   s_list *list;
   list = list_new(next);
@@ -694,7 +695,7 @@ s_list * list_new_str (s8 *p_free, uw size, const s8 *p, s_list *next)
   return list;
 }
 
-s_list * list_new_str_1 (s8 *p_free, const s8 *p, s_list *next)
+s_list * list_new_str_1 (char *p_free, const char *p, s_list *next)
 {
   s_list *list;
   list = list_new(next);
@@ -762,7 +763,7 @@ s_list * list_new_sym (const s_sym *sym, s_list *next)
   return list;
 }
 
-s_list * list_new_sym_1 (const s8 *p, s_list *next)
+s_list * list_new_sym_1 (const char *p, s_list *next)
 {
   s_list *list;
   list = list_new(next);
diff --git a/libc3/list_init.h b/libc3/list_init.h
index dc3aa1b..e47ece0 100644
--- a/libc3/list_init.h
+++ b/libc3/list_init.h
@@ -27,23 +27,24 @@ s_list * list_init_f32 (s_list *list, f32 f, s_list *next);
 s_list * list_init_f64 (s_list *list, f64 f, s_list *next);
 s_list * list_init_ident (s_list *list, const s_ident *ident, 
                           s_list *next);
-s_list * list_init_ident_1 (s_list *list, const s8 *p, s_list *next);
-s_list * list_init_integer_1 (s_list *list, const s8 *p, s_list *next);
+s_list * list_init_ident_1 (s_list *list, const char *p, s_list *next);
+s_list * list_init_integer_1 (s_list *list, const char *p, 
+                              s_list *next);
 s_list * list_init_integer_copy (s_list *list, const s_integer *i, 
                                  s_list *next);
 s_list * list_init_integer_zero (s_list *list, s_list *next);
 
 s_list * list_init_map (s_list *list, uw count, s_list *next);
-s_list * list_init_map_1 (s_list *list, const s8 *p, s_list *next);
+s_list * list_init_map_1 (s_list *list, const char *p, s_list *next);
 s_list * list_init_ptr (s_list *list, void *p, s_list *next);
 s_list * list_init_ptr_free (s_list *list, void *p, s_list *next);
 s_list * list_init_s8 (s_list *list, s8 i, s_list *next);
 s_list * list_init_s16 (s_list *list, s16 i, s_list *next);
 s_list * list_init_s32 (s_list *list, s32 i, s_list *next);
 s_list * list_init_s64 (s_list *list, s64 i, s_list *next);
-s_list * list_init_str (s_list *list, s8 *p_free, uw size, const s8 *p, 
-                        s_list *next);
-s_list * list_init_str_1 (s_list *list, s8 *p_free, const s8 *p, 
+s_list * list_init_str (s_list *list, char *p_free, uw size, 
+                        const char *p, s_list *next);
+s_list * list_init_str_1 (s_list *list, char *p_free, const char *p, 
                           s_list *next);
 s_list * list_init_struct (s_list *list, const s_sym *module, 
                            s_list *next);
@@ -52,7 +53,7 @@ s_list * list_init_struct_with_data (s_list *list, const s_sym *module,
                                      s_list *next);
 s_list * list_init_sw (s_list *list, sw i, s_list *next);
 s_list * list_init_sym (s_list *list, const s_sym *sym, s_list *next);
-s_list * list_init_sym_1 (s_list *list, const s8 *p, s_list *next);
+s_list * list_init_sym_1 (s_list *list, const char *p, s_list *next);
 s_list * list_init_tuple (s_list *list, uw count, s_list *next);
 s_list * list_init_tuple_2 (s_list *list, const s_tag *a, 
                             const s_tag *b, s_list *next);
@@ -75,28 +76,29 @@ s_list * list_new_character (character c, s_list *next);
 s_list * list_new_f32 (f32 f, s_list *next);
 s_list * list_new_f64 (f64 f, s_list *next);
 s_list * list_new_ident (const s_ident *ident, s_list *next);
-s_list * list_new_ident_1 (const s8 *p, s_list *next);
-s_list * list_new_integer_1 (const s8 *p, s_list *next);
+s_list * list_new_ident_1 (const char *p, s_list *next);
+s_list * list_new_integer_1 (const char *p, s_list *next);
 s_list * list_new_integer_copy (const s_integer *i, s_list *next);
 s_list * list_new_integer_zero (s_list *next);
 
 s_list * list_new_map (uw count, s_list *next);
-s_list * list_new_map_1 (const s8 *p, s_list *next);
+s_list * list_new_map_1 (const char *p, s_list *next);
 s_list * list_new_ptr (void *p, s_list *next);
 s_list * list_new_ptr_free (void *p, s_list *next);
 s_list * list_new_s8 (s8 i, s_list *next);
 s_list * list_new_s16 (s16 i, s_list *next);
 s_list * list_new_s32 (s32 i, s_list *next);
 s_list * list_new_s64 (s64 i, s_list *next);
-s_list * list_new_str (s8 *p_free, uw size, const s8 *p, s_list *next);
-s_list * list_new_str_1 (s8 *p_free, const s8 *p, s_list *next);
+s_list * list_new_str (char *p_free, uw size, const char *p, 
+                       s_list *next);
+s_list * list_new_str_1 (char *p_free, const char *p, s_list *next);
 s_list * list_new_struct (const s_sym *module, s_list *next);
 s_list * list_new_struct_with_data (const s_sym *module, 
                                     bool free_data, void *data, 
                                     s_list *next);
 s_list * list_new_sw (sw i, s_list *next);
 s_list * list_new_sym (const s_sym *sym, s_list *next);
-s_list * list_new_sym_1 (const s8 *p, s_list *next);
+s_list * list_new_sym_1 (const char *p, s_list *next);
 s_list * list_new_tuple (uw count, s_list *next);
 s_list * list_new_tuple_2 (const s_tag *a, const s_tag *b, 
                            s_list *next);
@@ -119,27 +121,27 @@ s_list * list_character (s_list *list, character c);
 s_list * list_f32 (s_list *list, f32 f);
 s_list * list_f64 (s_list *list, f64 f);
 s_list * list_ident (s_list *list, const s_ident *ident);
-s_list * list_ident_1 (s_list *list, const s8 *p);
-s_list * list_integer_1 (s_list *list, const s8 *p);
+s_list * list_ident_1 (s_list *list, const char *p);
+s_list * list_integer_1 (s_list *list, const char *p);
 s_list * list_integer_copy (s_list *list, const s_integer *i);
 s_list * list_integer_zero (s_list *list);
 
 s_list * list_map (s_list *list, uw count);
-s_list * list_map_1 (s_list *list, const s8 *p);
+s_list * list_map_1 (s_list *list, const char *p);
 s_list * list_ptr (s_list *list, void *p);
 s_list * list_ptr_free (s_list *list, void *p);
 s_list * list_s8 (s_list *list, s8 i);
 s_list * list_s16 (s_list *list, s16 i);
 s_list * list_s32 (s_list *list, s32 i);
 s_list * list_s64 (s_list *list, s64 i);
-s_list * list_str (s_list *list, s8 *p_free, uw size, const s8 *p);
-s_list * list_str_1 (s_list *list, s8 *p_free, const s8 *p);
+s_list * list_str (s_list *list, char *p_free, uw size, const char *p);
+s_list * list_str_1 (s_list *list, char *p_free, const char *p);
 s_list * list_struct (s_list *list, const s_sym *module);
 s_list * list_struct_with_data (s_list *list, const s_sym *module, 
                                 bool free_data, void *data);
 s_list * list_sw (s_list *list, sw i);
 s_list * list_sym (s_list *list, const s_sym *sym);
-s_list * list_sym_1 (s_list *list, const s8 *p);
+s_list * list_sym_1 (s_list *list, const char *p);
 s_list * list_tuple (s_list *list, uw count);
 s_list * list_tuple_2 (s_list *list, const s_tag *a, const s_tag *b);
 s_list * list_time (s_list *list);
diff --git a/libc3/map.c b/libc3/map.c
index b8fda6d..a82b673 100644
--- a/libc3/map.c
+++ b/libc3/map.c
@@ -84,13 +84,13 @@ s_map * map_init (s_map *map, uw count)
   return map;
 }
 
-s_map * map_init_1 (s_map *map, const s8 *p)
+s_map * map_init_1 (s_map *map, const char *p)
 {
   s_buf buf;
   sw r;
   assert(map);
   assert(p);
-  buf_init_1(&buf, false, (s8 *) p);
+  buf_init_1(&buf, false, (char *) p);
   if ((r = buf_parse_map(&buf, map)) != (sw) strlen(p)) {
     assert(! "invalid map");
     warnx("invalid map: \"%s\" (%ld)", p, r);
@@ -182,7 +182,7 @@ s_map * map_new (uw count)
   return map_init(map, count);
 }
 
-s_map * map_new_1 (const s8 *p)
+s_map * map_new_1 (const char *p)
 {
   s_map *map;
   if (! (map = malloc(sizeof(s_map)))) {
diff --git a/libc3/map.h b/libc3/map.h
index 2e54be5..125751c 100644
--- a/libc3/map.h
+++ b/libc3/map.h
@@ -18,7 +18,7 @@
 /* Stack allocation compatible functions, call map_clean after use. */
 void    map_clean (s_map *map);
 s_map * map_init (s_map *map, uw size);
-s_map * map_init_1 (s_map *map, const s8 *p);
+s_map * map_init_1 (s_map *map, const char *p);
 s_map * map_init_cast (s_map *map, const s_tag *tag);
 s_map * map_init_copy (s_map *map, const s_map *src);
 s_map * map_init_from_lists (s_map *map, const s_list *keys,
@@ -27,7 +27,7 @@ s_map * map_init_from_lists (s_map *map, const s_list *keys,
 /* Heap allocation functions, call map_delete after use. */
 void    map_delete (s_map *map);
 s_map * map_new (uw size);
-s_map * map_new_1 (const s8 *p);
+s_map * map_new_1 (const char *p);
 s_map * map_new_from_lists (const s_list *keys, const s_list *values);
 
 /* Modifiers */
diff --git a/libc3/sequence.c b/libc3/sequence.c
index a50ea21..cb24e27 100644
--- a/libc3/sequence.c
+++ b/libc3/sequence.c
@@ -20,7 +20,7 @@ void sequence_clean (s_sequence *seq)
 }
 
 s_sequence * sequence_init (s_sequence *seq, f64 duration,
-                            const s8 *title, f_sequence load,
+                            const char *title, f_sequence load,
                             f_sequence render, f_sequence unload,
                             void *window)
 {
diff --git a/libc3/sequence.h b/libc3/sequence.h
index a869db2..2065e13 100644
--- a/libc3/sequence.h
+++ b/libc3/sequence.h
@@ -19,7 +19,7 @@
    after use. */
 void         sequence_clean (s_sequence *seq);
 s_sequence * sequence_init (s_sequence *sequence, f64 duration,
-                            const s8 *title, f_sequence load,
+                            const char *title, f_sequence load,
                             f_sequence render, f_sequence unload,
                             void *window);
 
diff --git a/libc3/str.c b/libc3/str.c
index 6dffba0..185129c 100644
--- a/libc3/str.c
+++ b/libc3/str.c
@@ -95,7 +95,7 @@ bool str_has_reserved_characters (const s_str *src)
   return false;
 }
 
-s_str * str_init (s_str *str, s8 *free, uw size, const s8 *p)
+s_str * str_init (s_str *str, char *free, uw size, const char *p)
 {
   assert(str);
   str->free.p = free;
@@ -104,7 +104,7 @@ s_str * str_init (s_str *str, s8 *free, uw size, const s8 *p)
   return str;
 }
 
-s_str * str_init_1 (s_str *str, s8 *free, const s8 *p)
+s_str * str_init_1 (s_str *str, char *free, const char *p)
 {
   assert(str);
   str->free.p = free;
@@ -113,7 +113,7 @@ s_str * str_init_1 (s_str *str, s8 *free, const s8 *p)
   return str;
 }
 
-s_str * str_init_alloc (s_str *str, uw size, const s8 *p)
+s_str * str_init_alloc (s_str *str, uw size, const char *p)
 {
   assert(str);
   str->free.p = calloc(size + 1, 1);
@@ -155,7 +155,7 @@ s_str * str_init_copy (s_str *str, const s_str *src)
   return str;
 }
 
-s_str * str_init_copy_1 (s_str *str, const s8 *src)
+s_str * str_init_copy_1 (s_str *str, const char *src)
 {
   uw len;
   assert(str);
@@ -191,7 +191,7 @@ s_str * str_init_slice (s_str *str, const s_str *src, sw start, sw end)
   s_buf buf;
   assert(str);
   assert(src);
-  buf_init(&buf, false, src->size, (s8 *) src->ptr.ps8);
+  buf_init(&buf, false, src->size, (char *) src->ptr.pchar);
   if (! str_sw_pos_to_uw(start, src->size, &buf.rpos) ||
       ! str_sw_pos_to_uw(end, src->size, &buf.wpos))
     return NULL;
@@ -234,7 +234,7 @@ uw * str_sw_pos_to_uw (sw pos, uw max_pos, uw *dest)
 s_str * str_init_vf (s_str *str, const char *fmt, va_list ap)
 {
   int len;
-  s8 *s;
+  char *s;
   len = vasprintf(&s, fmt, ap);
   if (len < 0)
     err(1, "vasprintf");
@@ -268,7 +268,7 @@ sw str_length_utf8 (const s_str *str)
   return result;
 }
 
-s_str * str_new (s8 *free, uw size, const s8 *p)
+s_str * str_new (char *free, uw size, const char *p)
 {
   s_str *str;
   str = malloc(sizeof(s_str));
@@ -278,16 +278,16 @@ s_str * str_new (s8 *free, uw size, const s8 *p)
   return str;
 }
 
-s_str * str_new_1 (s8 *free, const s8 *s)
+s_str * str_new_1 (char *free, const char *s)
 {
   size_t len = strlen(s);
   s_str *str = str_new(free, len, s);
   return str;
 }
 
-s_str * str_new_cpy (const s8 *p, uw size)
+s_str * str_new_cpy (const char *p, uw size)
 {
-  s8 *a;
+  char *a;
   s_str *str;
   if (! (a = malloc(size))) {
     warn("str_new_cpy");
@@ -300,7 +300,7 @@ s_str * str_new_cpy (const s8 *p, uw size)
 
 s_str * str_new_copy (const s_str *src)
 {
-  s8 *a;
+  char *a;
   s_str *dest;
   assert(src);
   if (! (a = malloc(src->size))) {
@@ -424,7 +424,7 @@ sw str_read_character_utf8 (s_str *str, character *c)
   if (size < 0)
     return size;
   str->size -= size;
-  str->ptr.p = str->ptr.ps8 + size;
+  str->ptr.p = str->ptr.pchar + size;
   return size;
 }
 
diff --git a/libc3/str.h b/libc3/str.h
index e9b6cc2..f44f532 100644
--- a/libc3/str.h
+++ b/libc3/str.h
@@ -28,12 +28,12 @@
 
 /* Stack allocation compatible functions */
 void    str_clean (s_str *str);
-s_str * str_init (s_str *str, s8 *free, uw size, const s8 *p);
-s_str * str_init_1 (s_str *str, s8 *free, const s8 *p);
-s_str * str_init_alloc (s_str *str, uw size, const s8 *p);
+s_str * str_init (s_str *str, char *free, uw size, const char *p);
+s_str * str_init_1 (s_str *str, char *free, const char *p);
+s_str * str_init_alloc (s_str *str, uw size, const char *p);
 s_str * str_init_cast (s_str *str, const s_tag *tag);
 s_str * str_init_copy (s_str *str, const s_str *src);
-s_str * str_init_copy_1 (s_str *str, const s8 *p);
+s_str * str_init_copy_1 (s_str *str, const char *p);
 s_str * str_init_empty (s_str *str);
 s_str * str_init_f (s_str *str, const char *fmt, ...);
 s_str * str_init_slice (s_str *str, const s_str *src, sw start, sw end);
@@ -42,9 +42,9 @@ s_str * str_init_slice_utf8 (s_str *str, const s_str *src, sw start,
 s_str * str_init_vf (s_str *str, const char *fmt, va_list ap);
 
 /* Constructors, call str_delete after use */
-s_str * str_new (s8 *free, uw size, const s8 *p);
-s_str * str_new_1 (s8 *free, const s8 *p);
-s_str * str_new_cpy (const s8 *p, uw size);
+s_str * str_new (char *free, uw size, const char *p);
+s_str * str_new_1 (char *free, const char *p);
+s_str * str_new_cpy (const char *p, uw size);
 s_str * str_new_copy (const s_str *src);
 s_str * str_new_empty (void);
 s_str * str_new_f (const char *fmt, ...);
diff --git a/libc3/sym.c b/libc3/sym.c
index fae25ea..29e8d59 100644
--- a/libc3/sym.c
+++ b/libc3/sym.c
@@ -21,7 +21,7 @@ s_sym_list * sym_list_new (s_sym *sym, s_sym_list *next);
 
 static s_sym_list * g_sym_list = NULL;
 
-const s_sym * sym_1 (const s8 *p)
+const s_sym * sym_1 (const char *p)
 {
   s_str stra;
   str_init_1(&stra, NULL, p);
@@ -100,7 +100,7 @@ bool sym_has_reserved_characters (const s_sym *sym)
   return false;
 }
 
-const s_sym ** sym_init_1 (const s_sym **sym, const s8 *p)
+const s_sym ** sym_init_1 (const s_sym **sym, const char *p)
 {
   assert(sym);
   assert(p);
@@ -345,7 +345,7 @@ bool sym_to_buf_inspect (const s_sym *type, f_buf_inspect *dest)
     return true;
   }
   err_write_1("sym_to_buf_inspect: unknown type: ");
-  err_write_1(type->str.ptr.ps8);
+  err_write_1(type->str.ptr.pchar);
   err_write_1("\n");
   assert(! "sym_to_buf_inspect: unknown type");
   return false;
diff --git a/libc3/sym.h b/libc3/sym.h
index 289e4ca..83d1929 100644
--- a/libc3/sym.h
+++ b/libc3/sym.h
@@ -26,8 +26,8 @@
 
 #define SYM_MAX 1024
 
-const s_sym  * sym_1 (const s8 *p);
-const s_sym ** sym_init_1 (const s_sym **sym, const s8 *p);
+const s_sym  * sym_1 (const char *p);
+const s_sym ** sym_init_1 (const s_sym **sym, const char *p);
 const s_sym ** sym_init_cast (const s_sym **sym, const s_tag *tag);
 const s_sym ** sym_init_copy (const s_sym **sym,
                               const s_sym * const *src);
diff --git a/libc3/tag.c b/libc3/tag.c
index 792ac9f..6c4c9d1 100644
--- a/libc3/tag.c
+++ b/libc3/tag.c
@@ -45,7 +45,7 @@
 s_tag g_tag_first;
 s_tag g_tag_last;
 
-s_tag * tag_1 (s_tag *tag, const s8 *p)
+s_tag * tag_1 (s_tag *tag, const char *p)
 {
   tag_clean(tag);
   return tag_init_1(tag, p);
@@ -377,7 +377,7 @@ s_tag * tag_init (s_tag *tag)
   return tag;
 }
 
-s_tag * tag_init_1 (s_tag *tag, const s8 *p)
+s_tag * tag_init_1 (s_tag *tag, const char *p)
 {
   s_buf buf;
   uw len;
@@ -386,7 +386,7 @@ s_tag * tag_init_1 (s_tag *tag, const s8 *p)
   tag_init_void(tag);
   if (! p)
     return tag;
-  buf_init_1(&buf, false, (s8 *) p);
+  buf_init_1(&buf, false, (char *) p);
   len = strlen(p);
   r = buf_parse_tag(&buf, tag);
   if (r < 0 || (uw) r != len) {
@@ -488,7 +488,7 @@ bool tag_is_unbound_var (const s_tag *tag)
   return (tag && tag->type == TAG_VAR);
 }
 
-s_tag * tag_list_1 (s_tag *tag, const s8 *p)
+s_tag * tag_list_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -585,7 +585,7 @@ s_tag * tag_new (void)
   return tag;
 }
 
-s_tag * tag_new_1 (const s8 *p)
+s_tag * tag_new_1 (const char *p)
 {
   s_tag *tag;
   tag = calloc(1, sizeof(s_tag));
@@ -658,7 +658,7 @@ bool tag_to_const_pointer (const s_tag *tag, const s_sym *type,
   if (tag->type != tag_type) {
     warnx("tag_to_const_pointer: cannot cast %s to %s",
           tag_type_to_string(tag->type),
-          type->str.ptr.ps8);
+          type->str.ptr.pchar);
     assert(! "tag_to_const_pointer: cannot cast");
     return false;
   }
@@ -886,7 +886,7 @@ bool tag_to_ffi_pointer (s_tag *tag, const s_sym *type, void **dest)
       return true;
     }
     if (type == sym_1("Char*")) {
-      *dest = (void *) tag->data.str.ptr.ps8;
+      *dest = (void *) tag->data.str.ptr.pchar;
       return true;
     }
     goto invalid_cast;
@@ -916,7 +916,7 @@ bool tag_to_ffi_pointer (s_tag *tag, const s_sym *type, void **dest)
       return true;
     }
     if (type == sym_1("Char*")) {
-      *dest = (void *) tag->data.sym->str.ptr.ps8;
+      *dest = (void *) tag->data.sym->str.ptr.pchar;
       return true;
     }
     goto invalid_cast;
diff --git a/libc3/tag.h b/libc3/tag.h
index 33304d3..a6cf8f3 100644
--- a/libc3/tag.h
+++ b/libc3/tag.h
@@ -32,12 +32,12 @@ extern s_tag g_tag_last;
 /* Stack-allocation compatible functions, call tag_clean after use. */
 void    tag_clean (s_tag *tag);
 s_tag * tag_init (s_tag *tag);
-s_tag * tag_init_1 (s_tag *tag, const s8 *p);
+s_tag * tag_init_1 (s_tag *tag, const char *p);
 
 /* Heap-allocation functions, call tag_delete after use. */
 void    tag_delete (s_tag *tag);
 s_tag * tag_new (void);
-s_tag * tag_new_1 (const s8 *p);
+s_tag * tag_new_1 (const char *p);
 
 /* Observers */
 u64            tag_hash_u64 (const s_tag *tag);
@@ -53,7 +53,7 @@ ffi_type       tag_to_ffi_type(const s_tag *tag);
 const s_sym ** tag_type (const s_tag *tag, const s_sym **type);
 
 /* Operators. */
-s_tag * tag_1 (s_tag *tag, const s8 *p);
+s_tag * tag_1 (s_tag *tag, const char *p);
 s_tag * tag_integer_cast_to_s16 (const s_tag *tag, s_tag *dest);
 s_tag * tag_integer_cast_to_s32 (const s_tag *tag, s_tag *dest);
 s_tag * tag_integer_cast_to_s64 (const s_tag *tag, s_tag *dest);
@@ -63,7 +63,7 @@ s_tag * tag_integer_cast_to_u32 (const s_tag *tag, s_tag *dest);
 s_tag * tag_integer_cast_to_u64 (const s_tag *tag, s_tag *dest);
 s_tag * tag_integer_cast_to_u8 (const s_tag *tag, s_tag *dest);
 s_tag * tag_integer_reduce (s_tag *tag);
-s_tag * tag_list_1 (s_tag *tag, const s8 *p);
+s_tag * tag_list_1 (s_tag *tag, const char *p);
 bool    tag_to_const_pointer (const s_tag *tag, const s_sym *type,
                               const void **dest);
 bool    tag_to_ffi_pointer (s_tag *tag, const s_sym *type, void **dest);
diff --git a/libc3/tag_init.c b/libc3/tag_init.c
index 49ecc2c..6e6082b 100644
--- a/libc3/tag_init.c
+++ b/libc3/tag_init.c
@@ -111,7 +111,7 @@ s_tag * tag_init_ident (s_tag *tag, const s_ident *ident)
   return tag;
 }
 
-s_tag * tag_init_ident_1 (s_tag *tag, const s8 *p)
+s_tag * tag_init_ident_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -122,7 +122,7 @@ s_tag * tag_init_ident_1 (s_tag *tag, const s8 *p)
   return tag;
 }
 
-s_tag * tag_init_integer_1 (s_tag *tag, const s8 *p)
+s_tag * tag_init_integer_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -176,7 +176,7 @@ s_tag * tag_init_map (s_tag *tag, uw count)
   return tag;
 }
 
-s_tag * tag_init_map_1 (s_tag *tag, const s8 *p)
+s_tag * tag_init_map_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -249,7 +249,7 @@ s_tag * tag_init_s64 (s_tag *tag, s64 i)
   return tag;
 }
 
-s_tag * tag_init_str (s_tag *tag, s8 *p_free, uw size, const s8 *p)
+s_tag * tag_init_str (s_tag *tag, char *p_free, uw size, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -260,7 +260,7 @@ s_tag * tag_init_str (s_tag *tag, s8 *p_free, uw size, const s8 *p)
   return tag;
 }
 
-s_tag * tag_init_str_1 (s_tag *tag, s8 *p_free, const s8 *p)
+s_tag * tag_init_str_1 (s_tag *tag, char *p_free, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -315,7 +315,7 @@ s_tag * tag_init_sym (s_tag *tag, const s_sym *sym)
   return tag;
 }
 
-s_tag * tag_init_sym_1 (s_tag *tag, const s8 *p)
+s_tag * tag_init_sym_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -507,7 +507,7 @@ s_tag * tag_new_ident (const s_ident *ident)
   return tag;
 }
 
-s_tag * tag_new_ident_1 (const s8 *p)
+s_tag * tag_new_ident_1 (const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -522,7 +522,7 @@ s_tag * tag_new_ident_1 (const s8 *p)
   return tag;
 }
 
-s_tag * tag_new_integer_1 (const s8 *p)
+s_tag * tag_new_integer_1 (const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -594,7 +594,7 @@ s_tag * tag_new_map (uw count)
   return tag;
 }
 
-s_tag * tag_new_map_1 (const s8 *p)
+s_tag * tag_new_map_1 (const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -687,7 +687,7 @@ s_tag * tag_new_s64 (s64 i)
   return tag;
 }
 
-s_tag * tag_new_str (s8 *p_free, uw size, const s8 *p)
+s_tag * tag_new_str (char *p_free, uw size, const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -702,7 +702,7 @@ s_tag * tag_new_str (s8 *p_free, uw size, const s8 *p)
   return tag;
 }
 
-s_tag * tag_new_str_1 (s8 *p_free, const s8 *p)
+s_tag * tag_new_str_1 (char *p_free, const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -773,7 +773,7 @@ s_tag * tag_new_sym (const s_sym *sym)
   return tag;
 }
 
-s_tag * tag_new_sym_1 (const s8 *p)
+s_tag * tag_new_sym_1 (const char *p)
 {
   s_tag *tag;
   if (! (tag = calloc(1, sizeof(s_tag)))) {
@@ -980,7 +980,7 @@ s_tag * tag_ident (s_tag *tag, const s_ident *ident)
   return tag;
 }
 
-s_tag * tag_ident_1 (s_tag *tag, const s8 *p)
+s_tag * tag_ident_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -992,7 +992,7 @@ s_tag * tag_ident_1 (s_tag *tag, const s8 *p)
   return tag;
 }
 
-s_tag * tag_integer_1 (s_tag *tag, const s8 *p)
+s_tag * tag_integer_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -1051,7 +1051,7 @@ s_tag * tag_map (s_tag *tag, uw count)
   return tag;
 }
 
-s_tag * tag_map_1 (s_tag *tag, const s8 *p)
+s_tag * tag_map_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -1131,7 +1131,7 @@ s_tag * tag_s64 (s_tag *tag, s64 i)
   return tag;
 }
 
-s_tag * tag_str (s_tag *tag, s8 *p_free, uw size, const s8 *p)
+s_tag * tag_str (s_tag *tag, char *p_free, uw size, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -1143,7 +1143,7 @@ s_tag * tag_str (s_tag *tag, s8 *p_free, uw size, const s8 *p)
   return tag;
 }
 
-s_tag * tag_str_1 (s_tag *tag, s8 *p_free, const s8 *p)
+s_tag * tag_str_1 (s_tag *tag, char *p_free, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
@@ -1203,7 +1203,7 @@ s_tag * tag_sym (s_tag *tag, const s_sym *sym)
   return tag;
 }
 
-s_tag * tag_sym_1 (s_tag *tag, const s8 *p)
+s_tag * tag_sym_1 (s_tag *tag, const char *p)
 {
   s_tag tmp = {0};
   assert(tag);
diff --git a/libc3/tag_init.h b/libc3/tag_init.h
index fc1110e..7947320 100644
--- a/libc3/tag_init.h
+++ b/libc3/tag_init.h
@@ -25,27 +25,27 @@ s_tag * tag_init_copy (s_tag *tag, const s_tag *src);
 s_tag * tag_init_f32 (s_tag *tag, f32 f);
 s_tag * tag_init_f64 (s_tag *tag, f64 f);
 s_tag * tag_init_ident (s_tag *tag, const s_ident *ident);
-s_tag * tag_init_ident_1 (s_tag *tag, const s8 *p);
-s_tag * tag_init_integer_1 (s_tag *tag, const s8 *p);
+s_tag * tag_init_ident_1 (s_tag *tag, const char *p);
+s_tag * tag_init_integer_1 (s_tag *tag, const char *p);
 s_tag * tag_init_integer_copy (s_tag *tag, const s_integer *i);
 s_tag * tag_init_integer_zero (s_tag *tag);
 s_tag * tag_init_list (s_tag *tag, s_list *list);
 s_tag * tag_init_map (s_tag *tag, uw count);
-s_tag * tag_init_map_1 (s_tag *tag, const s8 *p);
+s_tag * tag_init_map_1 (s_tag *tag, const char *p);
 s_tag * tag_init_ptr (s_tag *tag, void *p);
 s_tag * tag_init_ptr_free (s_tag *tag, void *p);
 s_tag * tag_init_s8 (s_tag *tag, s8 i);
 s_tag * tag_init_s16 (s_tag *tag, s16 i);
 s_tag * tag_init_s32 (s_tag *tag, s32 i);
 s_tag * tag_init_s64 (s_tag *tag, s64 i);
-s_tag * tag_init_str (s_tag *tag, s8 *p_free, uw size, const s8 *p);
-s_tag * tag_init_str_1 (s_tag *tag, s8 *p_free, const s8 *p);
+s_tag * tag_init_str (s_tag *tag, char *p_free, uw size, const char *p);
+s_tag * tag_init_str_1 (s_tag *tag, char *p_free, const char *p);
 s_tag * tag_init_struct (s_tag *tag, const s_sym *module);
 s_tag * tag_init_struct_with_data (s_tag *tag, const s_sym *module, 
                                    bool free_data, void *data);
 s_tag * tag_init_sw (s_tag *tag, sw i);
 s_tag * tag_init_sym (s_tag *tag, const s_sym *sym);
-s_tag * tag_init_sym_1 (s_tag *tag, const s8 *p);
+s_tag * tag_init_sym_1 (s_tag *tag, const char *p);
 s_tag * tag_init_tuple (s_tag *tag, uw count);
 s_tag * tag_init_tuple_2 (s_tag *tag, const s_tag *a, const s_tag *b);
 s_tag * tag_init_time (s_tag *tag);
@@ -67,27 +67,27 @@ s_tag * tag_new_copy (const s_tag *src);
 s_tag * tag_new_f32 (f32 f);
 s_tag * tag_new_f64 (f64 f);
 s_tag * tag_new_ident (const s_ident *ident);
-s_tag * tag_new_ident_1 (const s8 *p);
-s_tag * tag_new_integer_1 (const s8 *p);
+s_tag * tag_new_ident_1 (const char *p);
+s_tag * tag_new_integer_1 (const char *p);
 s_tag * tag_new_integer_copy (const s_integer *i);
 s_tag * tag_new_integer_zero (void);
 s_tag * tag_new_list (s_list *list);
 s_tag * tag_new_map (uw count);
-s_tag * tag_new_map_1 (const s8 *p);
+s_tag * tag_new_map_1 (const char *p);
 s_tag * tag_new_ptr (void *p);
 s_tag * tag_new_ptr_free (void *p);
 s_tag * tag_new_s8 (s8 i);
 s_tag * tag_new_s16 (s16 i);
 s_tag * tag_new_s32 (s32 i);
 s_tag * tag_new_s64 (s64 i);
-s_tag * tag_new_str (s8 *p_free, uw size, const s8 *p);
-s_tag * tag_new_str_1 (s8 *p_free, const s8 *p);
+s_tag * tag_new_str (char *p_free, uw size, const char *p);
+s_tag * tag_new_str_1 (char *p_free, const char *p);
 s_tag * tag_new_struct (const s_sym *module);
 s_tag * tag_new_struct_with_data (const s_sym *module, bool free_data, 
                                   void *data);
 s_tag * tag_new_sw (sw i);
 s_tag * tag_new_sym (const s_sym *sym);
-s_tag * tag_new_sym_1 (const s8 *p);
+s_tag * tag_new_sym_1 (const char *p);
 s_tag * tag_new_tuple (uw count);
 s_tag * tag_new_tuple_2 (const s_tag *a, const s_tag *b);
 s_tag * tag_new_time (void);
@@ -109,27 +109,27 @@ s_tag * tag_copy (s_tag *tag, const s_tag *src);
 s_tag * tag_f32 (s_tag *tag, f32 f);
 s_tag * tag_f64 (s_tag *tag, f64 f);
 s_tag * tag_ident (s_tag *tag, const s_ident *ident);
-s_tag * tag_ident_1 (s_tag *tag, const s8 *p);
-s_tag * tag_integer_1 (s_tag *tag, const s8 *p);
+s_tag * tag_ident_1 (s_tag *tag, const char *p);
+s_tag * tag_integer_1 (s_tag *tag, const char *p);
 s_tag * tag_integer_copy (s_tag *tag, const s_integer *i);
 s_tag * tag_integer_zero (s_tag *tag);
 s_tag * tag_list (s_tag *tag, s_list *list);
 s_tag * tag_map (s_tag *tag, uw count);
-s_tag * tag_map_1 (s_tag *tag, const s8 *p);
+s_tag * tag_map_1 (s_tag *tag, const char *p);
 s_tag * tag_ptr (s_tag *tag, void *p);
 s_tag * tag_ptr_free (s_tag *tag, void *p);
 s_tag * tag_s8 (s_tag *tag, s8 i);
 s_tag * tag_s16 (s_tag *tag, s16 i);
 s_tag * tag_s32 (s_tag *tag, s32 i);
 s_tag * tag_s64 (s_tag *tag, s64 i);
-s_tag * tag_str (s_tag *tag, s8 *p_free, uw size, const s8 *p);
-s_tag * tag_str_1 (s_tag *tag, s8 *p_free, const s8 *p);
+s_tag * tag_str (s_tag *tag, char *p_free, uw size, const char *p);
+s_tag * tag_str_1 (s_tag *tag, char *p_free, const char *p);
 s_tag * tag_struct (s_tag *tag, const s_sym *module);
 s_tag * tag_struct_with_data (s_tag *tag, const s_sym *module, 
                               bool free_data, void *data);
 s_tag * tag_sw (s_tag *tag, sw i);
 s_tag * tag_sym (s_tag *tag, const s_sym *sym);
-s_tag * tag_sym_1 (s_tag *tag, const s8 *p);
+s_tag * tag_sym_1 (s_tag *tag, const char *p);
 s_tag * tag_tuple (s_tag *tag, uw count);
 s_tag * tag_tuple_2 (s_tag *tag, const s_tag *a, const s_tag *b);
 s_tag * tag_time (s_tag *tag);
diff --git a/libc3/tag_init.rb b/libc3/tag_init.rb
index 5d23dc1..066580e 100644
--- a/libc3/tag_init.rb
+++ b/libc3/tag_init.rb
@@ -271,7 +271,7 @@ end
 
 class TagInit1 < TagInit
   def initialize(name, suffix, tag_type, init_mode = :init_mode_init,
-                 args_list = [Arg.new("const s8 *", "p")])
+                 args_list = [Arg.new("const char *", "p")])
     super(name, suffix, tag_type, init_mode, args_list)
   end
 end
@@ -327,7 +327,7 @@ class TagInitList
        TagInit.new("list", "TAG_LIST", :init_mode_direct,
                    [Arg.new("s_list *", "list")]),
 #       TagInit1.new("list", "1", "TAG_LIST", :init_mode_init,
-#                    [Arg.new("const s8 *", "p"),
+#                    [Arg.new("const char *", "p"),
 #                     Arg.new("s_list *", "next")]),
        TagInit.new("map", "TAG_MAP", :init_mode_init,
                    [Arg.new("uw", "count")]),
@@ -345,12 +345,12 @@ class TagInitList
        TagInit.new("s64", "TAG_S64", :init_mode_direct,
                    [Arg.new("s64", "i")]),
        TagInit.new("str", "TAG_STR", :init_mode_init,
-                   [Arg.new("s8 *", "p_free"),
+                   [Arg.new("char *", "p_free"),
                     Arg.new("uw", "size"),
-                    Arg.new("const s8 *", "p")]),
+                    Arg.new("const char *", "p")]),
        TagInit.new("str", "1", "TAG_STR", :init_mode_init,
-                   [Arg.new("s8 *", "p_free"),
-                    Arg.new("const s8 *", "p")]),
+                   [Arg.new("char *", "p_free"),
+                    Arg.new("const char *", "p")]),
        TagInit.new("struct", "TAG_STRUCT", :init_mode_init,
                    [Arg.new("const s_sym *", "module")]),
        TagInit.new("struct", "with_data", "TAG_STRUCT", :init_mode_init,
diff --git a/libc3/tag_type.c b/libc3/tag_type.c
index 9d58c77..2dad942 100644
--- a/libc3/tag_type.c
+++ b/libc3/tag_type.c
@@ -99,7 +99,7 @@ bool tag_type_to_ffi_type (e_tag_type type, ffi_type **dest)
   return false;
 }
 
-const s8 * tag_type_to_string (e_tag_type tag_type)
+const char * tag_type_to_string (e_tag_type tag_type)
 {
   switch (tag_type) {
   case TAG_VOID:        return "Void";
diff --git a/libc3/tag_type.h b/libc3/tag_type.h
index dd5e0f2..016ed10 100644
--- a/libc3/tag_type.h
+++ b/libc3/tag_type.h
@@ -21,6 +21,6 @@
 
 #include "types.h"
 
-const s8 *    tag_type_to_string (e_tag_type type);
+const char *    tag_type_to_string (e_tag_type type);
 
 #endif /* LIBC3_TAG_TYPE */
diff --git a/libc3/tuple.c b/libc3/tuple.c
index 9e53ed8..e18d611 100644
--- a/libc3/tuple.c
+++ b/libc3/tuple.c
@@ -56,7 +56,7 @@ s_tuple * tuple_init (s_tuple *tuple, uw count)
   return tuple;
 }
 
-s_tuple * tuple_init_1 (s_tuple *tuple, const s8 *p)
+s_tuple * tuple_init_1 (s_tuple *tuple, const char *p)
 {
   s_buf buf;
   uw len;
@@ -64,7 +64,7 @@ s_tuple * tuple_init_1 (s_tuple *tuple, const s8 *p)
   assert(tuple);
   assert(p);
   len = strlen(p);
-  buf_init(&buf, false, len, (s8 *) p);
+  buf_init(&buf, false, len, (char *) p);
   buf.wpos = len;
   r = buf_parse_tuple(&buf, tuple);
   if (r < 0 || (uw) r != len) {
@@ -151,7 +151,7 @@ s_tuple * tuple_new (uw count)
   return tuple;
 }
 
-s_tuple * tuple_new_1 (const s8 *p)
+s_tuple * tuple_new_1 (const char *p)
 {
   s_tuple *tuple;
   tuple = malloc(sizeof(s_tuple));
diff --git a/libc3/tuple.h b/libc3/tuple.h
index e359608..1415ae8 100644
--- a/libc3/tuple.h
+++ b/libc3/tuple.h
@@ -24,7 +24,7 @@
 
 /* Stack allocation compatible functions */
 s_tuple * tuple_init (s_tuple *tuple, uw count);
-s_tuple * tuple_init_1 (s_tuple *tuple, const s8 *p);
+s_tuple * tuple_init_1 (s_tuple *tuple, const char *p);
 s_tuple * tuple_init_2 (s_tuple *tuple, const s_tag *a, const s_tag *b);
 s_tuple * tuple_init_cast (s_tuple *tuple, const s_tag *tag);
 s_tuple * tuple_init_copy (s_tuple *tuple, const s_tuple *src);
@@ -32,13 +32,13 @@ void      tuple_clean (s_tuple *tuple);
 
 /* Constructors, call tuple_delete after use */
 s_tuple * tuple_new (uw count);
-s_tuple * tuple_new_1 (const s8 *p);
+s_tuple * tuple_new_1 (const char *p);
 
 /* Destructor */
 void tuple_delete (s_tuple *tuple);
 
 /* Modifiers */
-s_tuple * tuple_1 (s_tuple *tuple, const s8 *p);
+s_tuple * tuple_1 (s_tuple *tuple, const char *p);
 
 /* Observers */
 s_list *         tuple_to_list (const s_tuple *tuple, s_list **list);
diff --git a/libc3/type.c b/libc3/type.c
index cc2388e..4508566 100644
--- a/libc3/type.c
+++ b/libc3/type.c
@@ -20,14 +20,14 @@
 const s_sym * type_pointer (const s_sym *type)
 {
   uw len;
-  s8 *mem;
+  char *mem;
   s_str str;
   const s_sym *tmp;
   assert(type);
   len = type->str.size + 2;
   if (! (mem = malloc(len)))
     errx(1, "type_pointer: out of memory");
-  memcpy(mem, type->str.ptr.ps8, type->str.size);
+  memcpy(mem, type->str.ptr.pchar, type->str.size);
   memcpy(mem + type->str.size, "*", 2);
   str_init(&str, mem, len, mem);
   tmp = str_to_sym(&str);
diff --git a/libc3/types.h b/libc3/types.h
index 2d7372b..a632cea 100644
--- a/libc3/types.h
+++ b/libc3/types.h
@@ -39,16 +39,16 @@
 #endif
 
 /* Basic integer types. */
-typedef char          s8;
+typedef int8_t        s8;
 typedef int16_t       s16;
 typedef int32_t       s32;
-typedef long          sw;
 typedef int64_t       s64;
+typedef long          sw;
 typedef uint8_t       u8;
 typedef uint16_t      u16;
 typedef uint32_t      u32;
-typedef unsigned long uw;
 typedef uint64_t      u64;
+typedef unsigned long uw;
 
 #ifdef SW_MAX
 #undef SW_MAX
@@ -173,7 +173,7 @@ typedef union tag_data u_tag_data;
 typedef union tag_type u_tag_type;
 
 /* typedefs */
-typedef s32            character;
+typedef u32            character;
 typedef s_tag      **p_facts_spec;
 typedef s_tag       *t_facts_spec[];
 typedef SHA1_CTX     t_hash;
@@ -237,14 +237,16 @@ struct map {
 
 union ptr_ {
   const void *p;
-  const s8   *ps8;
-  const u8   *pu8;
+  const char *pchar;
+  const s8 *ps8;
+  const u8 *pu8;
 };
 
 union ptr_w {
   void *p;
-  s8   *ps8;
-  u8   *pu8;
+  char *pchar;
+  s8 *ps8;
+  u8 *pu8;
 };
 
 struct quote {
@@ -466,7 +468,7 @@ struct sequence {
   u64 frame;
   f64 t;
   s_time t0;
-  const s8 *title;
+  const char *title;
   void *window;
   f_sequence load;
   f_sequence render;
@@ -555,7 +557,7 @@ struct facts_cursor {
 /* 9 */
 struct env {
   sw                argc;
-  s8              **argv;
+  char            **argv;
   s_str             argv0_dir;
   s_list           *backtrace;
   const s_sym      *current_module;
diff --git a/libc3/window/cairo/cairo_font.c b/libc3/window/cairo/cairo_font.c
index 4eca894..c10a76e 100644
--- a/libc3/window/cairo/cairo_font.c
+++ b/libc3/window/cairo/cairo_font.c
@@ -52,7 +52,7 @@ static FT_Library * cairo_font_ft (void)
   return g_cairo_font_ft;
 }
 
-s_cairo_font * cairo_font_init (s_cairo_font *font, const s8 *path)
+s_cairo_font * cairo_font_init (s_cairo_font *font, const char *path)
 {
   FT_Library *ft;
   assert(font);
@@ -66,9 +66,9 @@ s_cairo_font * cairo_font_init (s_cairo_font *font, const s8 *path)
     str_clean(&font->path);
     return NULL;
   }
-  if (FT_New_Face(*ft, font->real_path.ptr.ps8, 0, &font->ft_face)) {
+  if (FT_New_Face(*ft, font->real_path.ptr.pchar, 0, &font->ft_face)) {
     err_write_1("cairo_font_init: error loading font: ");
-    err_puts(font->real_path.ptr.ps8);
+    err_puts(font->real_path.ptr.pchar);
     str_clean(&font->path);
     str_clean(&font->real_path);
     return NULL;
diff --git a/libc3/window/cairo/cairo_font.h b/libc3/window/cairo/cairo_font.h
index 5d55775..fff82a4 100644
--- a/libc3/window/cairo/cairo_font.h
+++ b/libc3/window/cairo/cairo_font.h
@@ -17,10 +17,10 @@
 #include <err.h>
 #include "types.h"
 
-/* Stack-allocation compatible functions, call cairo_font_clean after
-   use. */
+/* Stack-allocation compatible functions, call cairo_font_clean
+   after use. */
 void           cairo_font_clean (s_cairo_font *font);
-s_cairo_font * cairo_font_init (s_cairo_font *font, const s8 *path);
+s_cairo_font * cairo_font_init (s_cairo_font *font, const char *path);
 
 /* Observers */
 void cairo_set_font (cairo_t *cr, const s_cairo_font *font);
diff --git a/libc3/window/cairo/cairo_sprite.c b/libc3/window/cairo/cairo_sprite.c
index 581bb7f..7033a0d 100644
--- a/libc3/window/cairo/cairo_sprite.c
+++ b/libc3/window/cairo/cairo_sprite.c
@@ -41,7 +41,7 @@ void cairo_sprite_clean (s_cairo_sprite *sprite)
 }
 
 s_cairo_sprite * cairo_sprite_init (s_cairo_sprite *sprite,
-                                    const s8 *path,
+                                    const char *path,
                                     uw dim_x, uw dim_y,
                                     uw frame_count)
 {
@@ -69,10 +69,11 @@ s_cairo_sprite * cairo_sprite_init (s_cairo_sprite *sprite,
     str_clean(&sprite->path);
     return NULL;
   }
-  src = cairo_image_surface_create_from_png(sprite->real_path.ptr.ps8);
+  src =
+    cairo_image_surface_create_from_png(sprite->real_path.ptr.pchar);
   if (! src) {
     err_write_1("cairo_sprite_init: error loading image: ");
-    err_puts(sprite->real_path.ptr.ps8);
+    err_puts(sprite->real_path.ptr.pchar);
     str_clean(&sprite->path);
     str_clean(&sprite->real_path);
     return NULL;
diff --git a/libc3/window/cairo/cairo_sprite.h b/libc3/window/cairo/cairo_sprite.h
index 53822f7..02312cb 100644
--- a/libc3/window/cairo/cairo_sprite.h
+++ b/libc3/window/cairo/cairo_sprite.h
@@ -19,7 +19,7 @@
 /* stack allocation compatible functions */
 void             cairo_sprite_clean (s_cairo_sprite *sprite);
 s_cairo_sprite * cairo_sprite_init (s_cairo_sprite *sprite,
-                                    const s8 *path,
+                                    const char *path,
                                     uw dim_x, uw dim_y,
                                     uw frame_count);
 
diff --git a/libc3/window/cairo/demo/flies.c b/libc3/window/cairo/demo/flies.c
index c9a74c7..247327f 100644
--- a/libc3/window/cairo/demo/flies.c
+++ b/libc3/window/cairo/demo/flies.c
@@ -128,7 +128,7 @@ bool flies_load (s_sequence *seq)
 
 bool flies_render (s_sequence *seq)
 {
-  s8 a[BOARD_SIZE];
+  char a[BOARD_SIZE];
   uw address[2];
   s_array *board;
   f64 board_w;
@@ -192,18 +192,18 @@ bool flies_render (s_sequence *seq)
       buf_write_1(&buf, "In ");
       buf_inspect_uw(&buf, fly_in);
       buf_write_u8(&buf, 0);
-      cairo_text_extents(cr, buf.ptr.ps8, &te);
+      cairo_text_extents(cr, buf.ptr.pchar, &te);
       y = board_h + board_item_h + te.height + te.y_bearing;
       x = board_x;
       cairo_move_to(cr, x, y);
-      cairo_show_text(cr, buf.ptr.ps8);
+      cairo_show_text(cr, buf.ptr.pchar);
       buf_init(&buf, false, sizeof(a), a);
       buf_write_1(&buf, "Out ");
       buf_inspect_uw(&buf, fly_out);
       buf_write_u8(&buf, 0);
       x = board_x + board_item_w * (BOARD_SIZE / 2 + 1);
       cairo_move_to(cr, x, y);
-      cairo_show_text(cr, buf.ptr.ps8);
+      cairo_show_text(cr, buf.ptr.pchar);
       address[1] = 0;
       while (address[1] < BOARD_SIZE) {
         y = board_item_h * address[1];
diff --git a/libc3/window/cairo/demo/window_cairo_demo.c b/libc3/window/cairo/demo/window_cairo_demo.c
index 6c85ac0..8611cbe 100644
--- a/libc3/window/cairo/demo/window_cairo_demo.c
+++ b/libc3/window/cairo/demo/window_cairo_demo.c
@@ -115,7 +115,7 @@ bool window_cairo_demo_load (s_window_cairo *window)
 }
 
 static void render_text (cairo_t *cr, double x, double y,
-                         const s8 *p)
+                         const char *p)
 {
   cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
   cairo_move_to(cr, x - 1.0, y - 1.0);
@@ -171,7 +171,7 @@ bool window_cairo_demo_render (s_window_cairo *window)
                   2);
   cairo_fill(cr);
   /* fps */
-  s8 fps[32];
+  char fps[32];
   snprintf(fps, sizeof(fps), "%f", (f64) seq->frame / seq->t);
   cairo_text_extents(cr, fps, &te);
   render_text(cr, 20.0, 20.0 + te.height, fps);
diff --git a/libc3/window/cairo/types.h b/libc3/window/cairo/types.h
index 7893512..e419fbe 100644
--- a/libc3/window/cairo/types.h
+++ b/libc3/window/cairo/types.h
@@ -108,7 +108,7 @@ struct window_cairo {
   uw                    sequence_count;
   uw                    sequence_pos;
   s_tag                 tag; // TODO: move sequence to tag
-  const s8             *title;
+  const char           *title;
   f_window_cairo_unload unload;
 };
 
diff --git a/libc3/window/cairo/window_cairo.c b/libc3/window/cairo/window_cairo.c
index da4abbd..05c9fd9 100644
--- a/libc3/window/cairo/window_cairo.c
+++ b/libc3/window/cairo/window_cairo.c
@@ -32,7 +32,7 @@ void window_cairo_clean (s_window_cairo *window)
 
 s_window_cairo * window_cairo_init (s_window_cairo *window,
                                     sw x, sw y, uw w, uw h,
-                                    const s8 *title,
+                                    const char *title,
                                     uw sequence_count)
 {
   s_window_cairo tmp = {0};
diff --git a/libc3/window/cairo/window_cairo.h b/libc3/window/cairo/window_cairo.h
index 678b198..ddc79d2 100644
--- a/libc3/window/cairo/window_cairo.h
+++ b/libc3/window/cairo/window_cairo.h
@@ -25,7 +25,7 @@ void c3_window_cairo_init (void);
 void             window_cairo_clean (s_window_cairo *window);
 s_window_cairo * window_cairo_init (s_window_cairo *window,
                                     sw x, sw y, uw w, uw h,
-                                    const s8 *title,
+                                    const char *title,
                                     uw sequence_count);
 bool             window_cairo_run (s_window_cairo *window);
 
diff --git a/libc3/window/sdl2/demo/flies.c b/libc3/window/sdl2/demo/flies.c
index 9151dcd..74dfcda 100644
--- a/libc3/window/sdl2/demo/flies.c
+++ b/libc3/window/sdl2/demo/flies.c
@@ -135,7 +135,7 @@ bool flies_load (s_sequence *seq)
 
 bool flies_render (s_sequence *seq)
 {
-  s8 a[BOARD_SIZE];
+  char a[BOARD_SIZE];
   uw address[2];
   s_array *board;
   f64 board_w;
diff --git a/libc3/window/sdl2/demo/window_sdl2_demo.c b/libc3/window/sdl2/demo/window_sdl2_demo.c
index 65cd7d8..388086f 100644
--- a/libc3/window/sdl2/demo/window_sdl2_demo.c
+++ b/libc3/window/sdl2/demo/window_sdl2_demo.c
@@ -310,7 +310,7 @@ bool window_sdl2_demo_render (s_window_sdl2 *window)
     12 + 2);
   */
   /* fps */
-  s8 fps[32];
+  char fps[32];
   snprintf(fps, sizeof(fps), "%.1f", (f64) seq->frame / seq->t);
   gl_text_update_1(&g_text_fps, fps);
   glEnable(GL_BLEND);
diff --git a/libc3/window/sdl2/gl_camera.c b/libc3/window/sdl2/gl_camera.c
index 9b1cb27..0ba3aaa 100644
--- a/libc3/window/sdl2/gl_camera.c
+++ b/libc3/window/sdl2/gl_camera.c
@@ -15,7 +15,7 @@
 #include "gl_camera.h"
 #include "gl_matrix_4f.h"
 
-static const s8 * g_gl_camera_vertex_shader_src = "#version 330 core\n"
+static const char * g_gl_camera_vertex_shader_src = "#version 330 core\n"
 "layout (location = 0) in vec3 aPos;\n"
 "uniform mat4 matrix;\n"
 "\n"
@@ -56,7 +56,7 @@ s_gl_camera * gl_camera_init (s_gl_camera *camera, uw w, uw h)
   glCompileShader(vertex_shader);
   glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
   if (! success) {
-    s8 info_log[512];
+    char info_log[512];
     glGetShaderInfoLog(vertex_shader, sizeof(info_log), NULL, info_log);
     err_write_1("gl_camera_init: shader compilation failed: ");
     err_puts(info_log);
diff --git a/libc3/window/sdl2/gl_deprecated.c b/libc3/window/sdl2/gl_deprecated.c
index dd77e39..e62df28 100644
--- a/libc3/window/sdl2/gl_deprecated.c
+++ b/libc3/window/sdl2/gl_deprecated.c
@@ -13,7 +13,7 @@
 #define GL_SILENCE_DEPRECATION 1
 #include "gl_deprecated.h"
 
-const s8 * gl_error_string (GLenum error)
+const char * gl_error_string (GLenum error)
 {
-  return (const s8 *) gluErrorString(error);
+  return (const char *) gluErrorString(error);
 }
diff --git a/libc3/window/sdl2/gl_deprecated.h b/libc3/window/sdl2/gl_deprecated.h
index 0699465..a0ab259 100644
--- a/libc3/window/sdl2/gl_deprecated.h
+++ b/libc3/window/sdl2/gl_deprecated.h
@@ -15,6 +15,6 @@
 
 #include "types.h"
 
-const s8 * gl_error_string (GLenum error);
+const char * gl_error_string (GLenum error);
 
 #endif /* GL_DEPRECATED_H */
diff --git a/libc3/window/sdl2/gl_font.c b/libc3/window/sdl2/gl_font.c
index 1a1f9b9..41ac14d 100644
--- a/libc3/window/sdl2/gl_font.c
+++ b/libc3/window/sdl2/gl_font.c
@@ -23,7 +23,7 @@ void gl_font_clean (s_gl_font *font)
   str_clean(&font->real_path);
 }
 
-s_gl_font * gl_font_init (s_gl_font *font, const s8 *path)
+s_gl_font * gl_font_init (s_gl_font *font, const char *path)
 {
   assert(font);
   assert(path);
@@ -35,9 +35,9 @@ s_gl_font * gl_font_init (s_gl_font *font, const s8 *path)
     return NULL;
   }
   assert(glGetError() == GL_NO_ERROR);
-  if (FT_New_Face(g_ft, font->real_path.ptr.ps8, 0, &font->ft_face)) {
+  if (FT_New_Face(g_ft, font->real_path.ptr.pchar, 0, &font->ft_face)) {
     err_write_1("gl_font_init: error loading font: ");
-    err_puts(font->real_path.ptr.ps8);
+    err_puts(font->real_path.ptr.pchar);
     str_clean(&font->path);
     str_clean(&font->real_path);
     return NULL;
diff --git a/libc3/window/sdl2/gl_font.h b/libc3/window/sdl2/gl_font.h
index 1ab8a96..6841544 100644
--- a/libc3/window/sdl2/gl_font.h
+++ b/libc3/window/sdl2/gl_font.h
@@ -20,7 +20,7 @@ extern FT_Library g_ft;
 /* Stack-allocation compatible functions, call gl_font_clean
    after use. */
 void        gl_font_clean (s_gl_font *font);
-s_gl_font * gl_font_init (s_gl_font *font, const s8 *path);
+s_gl_font * gl_font_init (s_gl_font *font, const char *path);
 
 /* Operators. */
 void gl_font_set_size (s_gl_font *font, f64 size, f64 pixels_per_point);
diff --git a/libc3/window/sdl2/gl_ortho.c b/libc3/window/sdl2/gl_ortho.c
index 0b5fe38..1b943ca 100644
--- a/libc3/window/sdl2/gl_ortho.c
+++ b/libc3/window/sdl2/gl_ortho.c
@@ -15,7 +15,7 @@
 #include "gl_ortho.h"
 #include "gl_matrix_4f.h"
 
-static const s8 * g_gl_ortho_vertex_shader_src = "#version 330 core\n"
+static const char * g_gl_ortho_vertex_shader_src = "#version 330 core\n"
   "layout (location = 0) in vec3 aPos;\n"
   "layout (location = 1) in vec3 aNorm;\n"
   "layout (location = 2) in vec2 aTexCoord;\n"
@@ -69,7 +69,7 @@ s_gl_ortho * gl_ortho_init (s_gl_ortho *ortho)
   glCompileShader(vertex_shader);
   glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
   if (! success) {
-    s8 info_log[512];
+    char info_log[512];
     glGetShaderInfoLog(vertex_shader, sizeof(info_log), NULL, info_log);
     err_write_1("gl_ortho_init: shader compilation failed: ");
     err_puts(info_log);
@@ -120,7 +120,7 @@ void gl_ortho_render (s_gl_ortho *ortho)
                      &ortho->projection_matrix.xx);
   if ((error = glGetError()) != GL_NO_ERROR) {
     err_write_1("gl_ortho_render: glUniformMatrix4fv: ");
-    err_puts((const s8 *) glewGetErrorString(error));
+    err_puts((const char *) glewGetErrorString(error));
     assert(! "gl_ortho_render: glUniformMatrix4fv");
   }
   assert(glGetError() == GL_NO_ERROR);
diff --git a/libc3/window/sdl2/gl_sprite.c b/libc3/window/sdl2/gl_sprite.c
index ad1d46e..2b68e92 100644
--- a/libc3/window/sdl2/gl_sprite.c
+++ b/libc3/window/sdl2/gl_sprite.c
@@ -96,7 +96,7 @@ static bool png_info_to_gl_info (s32 png_color_type,
   return true;
 }
 
-s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
+s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const char *path,
                               uw dim_x, uw dim_y, uw frame_count)
 {
   u8 *data;
@@ -139,10 +139,10 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
     str_clean(&tmp.path);
     return NULL;
   }
-  fp = fopen(tmp.real_path.ptr.ps8, "rb");
+  fp = fopen(tmp.real_path.ptr.pchar, "rb");
   if (! fp) {
     err_write_1("sdl2_sprite_init: fopen: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     str_clean(&tmp.path);
     str_clean(&tmp.real_path);
     return NULL;
@@ -150,7 +150,7 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
   if (fread(png_header, 1, sizeof(png_header), fp) !=
       sizeof(png_header)) {
     err_write_1("sdl2_sprite_init: fread: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     fclose(fp);
     str_clean(&tmp.path);
     str_clean(&tmp.real_path);
@@ -158,7 +158,7 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
   }
   if (png_sig_cmp(png_header, 0, sizeof(png_header))) {
     err_write_1("sdl2_sprite_init: not a png: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     fclose(fp);
     str_clean(&tmp.path);
     str_clean(&tmp.real_path);
@@ -168,7 +168,7 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
 				    NULL);
   if (! png_read) {
     err_write_1("sdl2_sprite_init: png_create_read_struct: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     fclose(fp);
     str_clean(&tmp.path);
     str_clean(&tmp.real_path);
@@ -177,7 +177,7 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
   png_info = png_create_info_struct(png_read);
   if (! png_info) {
     err_write_1("sdl2_sprite_init: png_create_info_struct: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     png_destroy_read_struct(&png_read, NULL, NULL);
     fclose(fp);
     str_clean(&tmp.path);
@@ -210,15 +210,15 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
       err_write_1("sdl2_sprite_init: unknown PNG color type ");
       err_inspect_s32(&png_color_type);
       err_write_1(": ");
-      err_puts(tmp.real_path.ptr.ps8);
+      err_puts(tmp.real_path.ptr.pchar);
     }
     if (! gl_internal_format) {
       err_write_1("sdl2_sprite_init: unknown OpenGL internal format: ");
-      err_puts(tmp.real_path.ptr.ps8);
+      err_puts(tmp.real_path.ptr.pchar);
     }
     if (! gl_type) {
       err_write_1("sdl2_sprite_init: unknown OpenGL type: ");
-      err_puts(tmp.real_path.ptr.ps8);
+      err_puts(tmp.real_path.ptr.pchar);
     }
     png_destroy_read_struct(&png_read, &png_info, NULL);
     fclose(fp);
@@ -273,7 +273,7 @@ s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
   data = malloc(tmp.h * sprite_stride);
   if (! data) {
     err_write_1("sdl2_sprite_init: failed to allocate memory: ");
-    err_puts(tmp.real_path.ptr.ps8);
+    err_puts(tmp.real_path.ptr.pchar);
     free(tmp.texture);
     str_clean(&tmp.path);
     str_clean(&tmp.real_path);
diff --git a/libc3/window/sdl2/gl_sprite.h b/libc3/window/sdl2/gl_sprite.h
index 22d7283..07ff58e 100644
--- a/libc3/window/sdl2/gl_sprite.h
+++ b/libc3/window/sdl2/gl_sprite.h
@@ -18,7 +18,7 @@
 /* Stack-allocation compatible functions, call gl_sprite_clean
    after use. */
 void          gl_sprite_clean (s_gl_sprite *sprite);
-s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const s8 *path,
+s_gl_sprite * gl_sprite_init (s_gl_sprite *sprite, const char *path,
                               uw dim_x, uw dim_y, uw frame_count);
 
 /* Observers. */
diff --git a/libc3/window/sdl2/gl_text.c b/libc3/window/sdl2/gl_text.c
index af261d9..c0e0820 100644
--- a/libc3/window/sdl2/gl_text.c
+++ b/libc3/window/sdl2/gl_text.c
@@ -46,7 +46,7 @@ s_gl_text * gl_text_init (s_gl_text *text, const s_gl_font *font)
 }
 
 s_gl_text * gl_text_init_1 (s_gl_text *text, const s_gl_font *font,
-                            const s8 *p)
+                            const char *p)
 {
   s_str str;
   str_init_1(&str, NULL, p);
@@ -194,7 +194,7 @@ bool gl_text_set_text (s_gl_text *text, const s_str *str)
   return false;
 }
 
-bool gl_text_set_text_1 (s_gl_text *text, const s8 *p)
+bool gl_text_set_text_1 (s_gl_text *text, const char *p)
 {
   s_str str;
   assert(text);
@@ -241,7 +241,7 @@ bool gl_text_update (s_gl_text *text)
   return true;
 }
 
-bool gl_text_update_1 (s_gl_text *text, const s8 *p)
+bool gl_text_update_1 (s_gl_text *text, const char *p)
 {
   if (gl_text_set_text_1(text, p)) {
     gl_text_update(text);
diff --git a/libc3/window/sdl2/gl_text.h b/libc3/window/sdl2/gl_text.h
index 835bfcd..af0f262 100644
--- a/libc3/window/sdl2/gl_text.h
+++ b/libc3/window/sdl2/gl_text.h
@@ -20,7 +20,7 @@
 void        gl_text_clean (s_gl_text *text);
 s_gl_text * gl_text_init (s_gl_text *text, const s_gl_font *font);
 s_gl_text * gl_text_init_1 (s_gl_text *text, const s_gl_font *font,
-                            const s8 *p);
+                            const char *p);
 s_gl_text * gl_text_init_str (s_gl_text *text, const s_gl_font *font,
                               const s_str *str);
 
@@ -28,10 +28,10 @@ s_gl_text * gl_text_init_str (s_gl_text *text, const s_gl_font *font,
 bool gl_text_render_to_texture (s_gl_text *text);
 bool gl_text_set_font (s_gl_text *text, const s_gl_font *font);
 bool gl_text_set_text (s_gl_text *text, const s_str *str);
-bool gl_text_set_text_1 (s_gl_text *text, const s8 *p);
+bool gl_text_set_text_1 (s_gl_text *text, const char *p);
 bool gl_text_set_text_buf (s_gl_text *text, s_buf *buf);
 bool gl_text_update (s_gl_text *text);
-bool gl_text_update_1 (s_gl_text *text, const s8 *p);
+bool gl_text_update_1 (s_gl_text *text, const char *p);
 bool gl_text_update_buf (s_gl_text *text, s_buf *buf);
 
 /* Observers. */
diff --git a/libc3/window/sdl2/types.h b/libc3/window/sdl2/types.h
index ec3d2f1..2b10053 100644
--- a/libc3/window/sdl2/types.h
+++ b/libc3/window/sdl2/types.h
@@ -237,7 +237,7 @@ struct window_sdl2 {
   uw                   sequence_count;
   uw                   sequence_pos;
   s_tag                tag; // TODO: move sequence to tag
-  const s8            *title;
+  const char          *title;
   f_window_sdl2_unload unload;
   uw gl_w;
   uw gl_h;
diff --git a/libc3/window/sdl2/window_sdl2.c b/libc3/window/sdl2/window_sdl2.c
index c46bc66..11eb091 100644
--- a/libc3/window/sdl2/window_sdl2.c
+++ b/libc3/window/sdl2/window_sdl2.c
@@ -110,7 +110,7 @@ void window_sdl2_default_unload_cb (s_window_sdl2 *window)
 
 s_window_sdl2 * window_sdl2_init (s_window_sdl2 *window,
                                   sw x, sw y, uw w, uw h,
-                                  const s8 *title,
+                                  const char *title,
                                   uw sequence_count)
 {
   s_window_sdl2 tmp = {0};
@@ -189,7 +189,7 @@ bool window_sdl2_run (s_window_sdl2 *window)
     warnx("window_sdl2_run: failed to initialize GLEW");
     goto ko;
   }
-  const s8 * version = (const s8 *) glGetString(GL_VERSION);
+  const char * version = (const char *) glGetString(GL_VERSION);
   if (version) {
     err_write_1("window_sdl2_run: OpenGL Version: ");
     err_puts(version);
diff --git a/libc3/window/sdl2/window_sdl2.h b/libc3/window/sdl2/window_sdl2.h
index e1041f3..444292b 100644
--- a/libc3/window/sdl2/window_sdl2.h
+++ b/libc3/window/sdl2/window_sdl2.h
@@ -20,7 +20,7 @@
 void            window_sdl2_clean (s_window_sdl2 *window);
 s_window_sdl2 * window_sdl2_init (s_window_sdl2 *window,
                                   sw x, sw y, uw w, uw h,
-                                  const s8 *title,
+                                  const char *title,
                                   uw sequence_count);
 
 /* Operators. */
diff --git a/libc3/window/types.h b/libc3/window/types.h
index 91c4ab3..0faaac7 100644
--- a/libc3/window/types.h
+++ b/libc3/window/types.h
@@ -65,7 +65,7 @@ struct window {
   uw              sequence_count;
   uw              sequence_pos;
   s_tag           tag; // TODO: move sequence to tag
-  const s8       *title;
+  const char     *title;
   f_window_unload unload;
 };
 
diff --git a/libc3/window/window.c b/libc3/window/window.c
index 95b41cc..fc8f23d 100644
--- a/libc3/window/window.c
+++ b/libc3/window/window.c
@@ -58,7 +58,7 @@ void window_clean (s_window *window)
 
 s_window * window_init (s_window *window,
                         sw x, sw y, uw w, uw h,
-                        const s8 *title,
+                        const char *title,
                         uw sequence_count)
 {
   s_window tmp = {0};
diff --git a/libc3/window/window.h b/libc3/window/window.h
index cdfeef8..e7d72af 100644
--- a/libc3/window/window.h
+++ b/libc3/window/window.h
@@ -21,7 +21,7 @@
 void       window_clean (s_window *window);
 s_window * window_init (s_window *window,
                         sw x, sw y, uw w, uw h,
-                        const s8 *title,
+                        const char *title,
                         uw sequence_count);
 
 /* Operators. */
diff --git a/libffi b/libffi
index cb01c20..7822a32 160000
--- a/libffi
+++ b/libffi
@@ -1 +1 @@
-Subproject commit cb01c2084a514e10a6fd5fa5e1d79bb4aa7d71dd
+Subproject commit 7822a324dc2f437fe0efab615e96c40cc4624bd9
diff --git a/linenoise b/linenoise
index a7327ba..c5b9dac 160000
--- a/linenoise
+++ b/linenoise
@@ -1 +1 @@
-Subproject commit a7327ba54af89b97ce7e5585b3bdbe39a31bbc48
+Subproject commit c5b9daca881649610c2b0dff5f355ec5539b5300
diff --git a/test/bool_test.c b/test/bool_test.c
index a08343b..2cea0aa 100644
--- a/test/bool_test.c
+++ b/test/bool_test.c
@@ -25,6 +25,7 @@
     TEST_EQ(str.size, strlen(expected));                               \
     TEST_STRNCMP(str.ptr.p, (expected), str.size);                     \
     str_clean(&str);						       \
+    test_context(NULL);                                                \
   } while (0)
 
 void bool_test (void);
diff --git a/test/buf_file_test.c b/test/buf_file_test.c
index 8d31f65..e3c708a 100644
--- a/test/buf_file_test.c
+++ b/test/buf_file_test.c
@@ -30,7 +30,7 @@ void buf_file_test (void)
 
 TEST_CASE(buf_file_open_r_close)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   FILE *fp;
   fp = fopen("/dev/null", "r");
@@ -46,7 +46,7 @@ TEST_CASE_END(buf_file_open_r_close)
 TEST_CASE(buf_file_open_r_refill)
 {
   u8 b = 0x80;
-  s8 bu[16];
+  char bu[16];
   s_buf buf;
   FILE *fp;
   sw i = 64;
diff --git a/test/buf_inspect_test.c b/test/buf_inspect_test.c
index 6ef97db..3b33f8c 100644
--- a/test/buf_inspect_test.c
+++ b/test/buf_inspect_test.c
@@ -17,7 +17,7 @@
 
 #define BUF_INSPECT_TEST_ARRAY(test, expected)                         \
   do {                                                                 \
-    s8 b[1024];                                                        \
+    char b[1024];                                                      \
     s_buf buf_result;                                                  \
     s_array tmp;                                                       \
     test_context("buf_inspect_array(" # test ") -> " # expected);      \
@@ -26,14 +26,14 @@
     TEST_EQ(buf_inspect_array_size(&tmp), strlen(expected));           \
     TEST_EQ(buf_inspect_array(&buf_result, &tmp), strlen(expected));   \
     TEST_EQ(buf_result.wpos, strlen(expected));                        \
-    TEST_STRNCMP(buf_result.ptr.ps8, (expected), buf_result.wpos);     \
+    TEST_STRNCMP(buf_result.ptr.pchar, (expected), buf_result.wpos);   \
     array_clean(&tmp);                                                 \
     buf_clean(&buf_result);                                            \
   } while (0)
 
 #define BUF_INSPECT_TEST_BOOL(test, expected)                          \
   do {                                                                 \
-    s8 b[16];                                                          \
+    char b[16];                                                        \
     s_buf buf;                                                         \
     bool tmp;                                                          \
     test_context("buf_inspect_bool(" # test ") -> " # expected);       \
@@ -47,7 +47,7 @@
   
 #define BUF_INSPECT_TEST_CHARACTER(test, expected)                     \
   do {                                                                 \
-    s8 b[32];                                                          \
+    char b[32];                                                        \
     s_buf buf;                                                         \
     character tmp;                                                     \
     test_context("buf_inspect_character(" # test ") -> " # expected);  \
@@ -56,20 +56,20 @@
     TEST_EQ(buf_inspect_character_size(&tmp), strlen(expected));       \
     TEST_EQ(buf_inspect_character(&buf, &tmp), strlen(expected));      \
     TEST_EQ(buf.wpos, strlen(expected));                               \
-    TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                   \
+    TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);                 \
     test_context(NULL);                                                \
   } while (0)
 
 #define BUF_INSPECT_TEST_F32(test, expected)                           \
   do {                                                                 \
-    s8 b[32];                                                          \
+    char b[32];                                                        \
     s_buf buf;                                                         \
     f32 tmp;                                                           \
     test_context("buf_inspect_f32(" # test ") -> " # expected);        \
     tmp = (test);                                                      \
     buf_init(&buf, false, sizeof(b), b);                               \
     buf_inspect_f32(&buf, &tmp);                                       \
-    TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                   \
+    TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);                 \
     TEST_EQ(buf.wpos, strlen(expected));                               \
     TEST_EQ(buf_inspect_f32_size(&tmp), strlen(expected));             \
     buf_init(&buf, false, sizeof(b), b);                               \
@@ -79,25 +79,25 @@
 
 #define BUF_INSPECT_TEST_F64(test, expected)                           \
   do {                                                                 \
-    s8 b[64];                                                          \
+    char b[64];                                                        \
     s_buf buf;                                                         \
     f64 tmp;                                                           \
     test_context("buf_inspect_f64(" # test ") -> " # expected);        \
     tmp = (test);                                                      \
     buf_init(&buf, false, sizeof(b), b);                               \
     buf_inspect_f64(&buf, &tmp);                                       \
-    TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                   \
+    TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);                 \
     TEST_EQ(buf.wpos, strlen(expected));                               \
     TEST_EQ(buf_inspect_f64_size(&tmp), strlen(expected));             \
     buf_init(&buf, false, sizeof(b), b);                               \
     TEST_EQ(buf_inspect_f64(&buf, &tmp), strlen(expected));            \
-    TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                   \
+    TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);                 \
     test_context(NULL);                                                \
   } while (0)
 
 #define BUF_INSPECT_TEST_INTEGER(test, expected)                       \
   do {                                                                 \
-    s8 b[1024];                                                        \
+    char b[1024];                                                      \
     s_buf buf_result;                                                  \
     s_integer i;                                                       \
     test_context("buf_inspect_integer(" # test ") -> " # expected);    \
@@ -107,7 +107,7 @@
     TEST_EQ(buf_inspect_integer(&buf_result, &i), strlen(test));       \
     integer_clean(&i);                                                 \
     TEST_EQ(buf_result.wpos, strlen(test));                            \
-    TEST_STRNCMP(buf_result.ptr.ps8, (expected), buf_result.wpos);     \
+    TEST_STRNCMP(buf_result.ptr.pchar, (expected), buf_result.wpos);   \
     buf_clean(&buf_result);                                            \
   } while (0)
 
@@ -131,7 +131,7 @@
 
 #define BUF_INSPECT_TEST_STR(test, expected)                           \
   do {                                                                 \
-    s8 b[1024];                                                        \
+    char b[1024];                                                      \
     s_buf buf;                                                         \
     s_str str;                                                         \
     test_context("buf_inspect_str(" # test ") -> " # expected);        \
@@ -145,7 +145,7 @@
 
 #define BUF_INSPECT_TEST_STR_CHARACTER(test, expected)                 \
   do {                                                                 \
-    s8 b[32];                                                          \
+    char b[32];                                                        \
     s_buf buf;                                                         \
     character tmp;                                                     \
     test_context("buf_inspect_str_character(" # test ") -> "           \
@@ -154,7 +154,7 @@
     tmp = (test);                                                      \
     TEST_EQ(buf_inspect_str_character_size(&tmp), strlen(expected));   \
     TEST_EQ(buf_inspect_str_character(&buf, &tmp), strlen(expected));  \
-    TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                   \
+    TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);                 \
     test_context(NULL);                                                \
   } while (0)
 
@@ -169,7 +169,7 @@
     TEST_EQ(buf_inspect_tag(&buf, test_tag), strlen(expected));        \
     TEST_EQ(buf.wpos, strlen(expected));                               \
     if (g_test_last_ok)                                                \
-      TEST_STRNCMP(buf.ptr.ps8, (expected), buf.wpos);                 \
+      TEST_STRNCMP(buf.ptr.pchar, (expected), buf.wpos);               \
     buf_clean(&buf);                                                   \
   } while (0)
 
@@ -256,12 +256,12 @@ TEST_CASE(buf_inspect_f64)
 {
   BUF_INSPECT_TEST_F64(0.0, "0.0");
   BUF_INSPECT_TEST_F64(0.1, "1.0e-1");
-  BUF_INSPECT_TEST_F64(0.123456789, "1.234567889999999e-1");
-  BUF_INSPECT_TEST_F64(1.23456789, "1.234567889999999");
+  BUF_INSPECT_TEST_F64(0.123456789, "1.23456788999999e-1");
+  BUF_INSPECT_TEST_F64(1.23456789, "1.23456788999999");
   BUF_INSPECT_TEST_F64(123456789.0, "1.23456789e+8");
   BUF_INSPECT_TEST_F64(-0.1, "-1.0e-1");
-  BUF_INSPECT_TEST_F64(-0.123456789, "-1.234567889999999e-1");
-  BUF_INSPECT_TEST_F64(-1.23456789, "-1.234567889999999");
+  BUF_INSPECT_TEST_F64(-0.123456789, "-1.23456788999999e-1");
+  BUF_INSPECT_TEST_F64(-1.23456789, "-1.23456788999999");
   BUF_INSPECT_TEST_F64(-123456789.0, "-1.23456789e+8");
 }
 TEST_CASE_END(buf_inspect_f64)
@@ -304,7 +304,7 @@ TEST_CASE(buf_inspect_str)
   BUF_INSPECT_TEST_STR("\v", "\"\\v\"");
   BUF_INSPECT_TEST_STR("\"", "\"\\\"\"");
   {
-    s8 b[1024];
+    char b[1024];
     s_buf buf;
     s_str str;
     test_context("buf_inspect_str(\"\\0\") -> \"\\0\"");
diff --git a/test/buf_parse_test.c b/test/buf_parse_test.c
index 6441896..9546e10 100644
--- a/test/buf_parse_test.c
+++ b/test/buf_parse_test.c
@@ -77,7 +77,7 @@
 #define BUF_PARSE_TEST_CHARACTER(test, expected)                       \
   do {                                                                 \
     s_buf buf;                                                         \
-    character dest = -1;                                               \
+    character dest = 0;                                               \
     test_context("buf_parse_character(" # test ") -> " # expected);    \
     buf_init_1(&buf, false, (test));                                   \
     TEST_EQ(buf_parse_character(&buf, &dest), strlen(test));           \
@@ -89,12 +89,12 @@
 #define BUF_PARSE_TEST_CHARACTER_EOF(test)                             \
   do {                                                                 \
     s_buf buf;                                                         \
-    character dest = -1;                                               \
+    character dest = 0;                                                \
     test_context("buf_parse_character(" # test ") -> -1");             \
     buf_init_1(&buf, false, (test));                                   \
     TEST_EQ(buf_parse_character(&buf, &dest), -1);                     \
     TEST_EQ(buf.rpos, 0);                                              \
-    TEST_EQ(dest, -1);                                                 \
+    TEST_EQ(dest, 0);                                                  \
     test_context(NULL);                                                \
   } while (0)
 
@@ -302,12 +302,12 @@
 #define BUF_PARSE_TEST_NOT_CHARACTER(test)                             \
   do {                                                                 \
     s_buf buf;                                                         \
-    character dest = -1;                                               \
+    character dest = 0;                                                \
     test_context("buf_parse_character(" # test ") -> 0");              \
     buf_init_1(&buf, false, (test));                                   \
     TEST_EQ(buf_parse_character(&buf, &dest), 0);                      \
     TEST_EQ(buf.rpos, 0);                                              \
-    TEST_EQ(dest, -1);                                                 \
+    TEST_EQ(dest, 0);                                                  \
     test_context(NULL);                                                \
   } while (0)
 
diff --git a/test/buf_test.c b/test/buf_test.c
index 954e8d7..b4a480b 100644
--- a/test/buf_test.c
+++ b/test/buf_test.c
@@ -36,7 +36,7 @@
     test_context(# test " -> " # expected);                            \
     TEST_EQ(test, len);                                                \
     TEST_EQ(buf.wpos, pos + len);                                      \
-    TEST_STRNCMP(buf.ptr.ps8 + pos, expected, len);                    \
+    TEST_STRNCMP(buf.ptr.pchar + pos, expected, len);                    \
   } while (0)
 
 #define BUF_TEST_IGNORE(test, count, expected)                         \
@@ -206,7 +206,7 @@ void buf_test (void)
 
 TEST_CASE(buf_f)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);          \
   BUF_TEST_F(buf_f(&buf, "09AZaz"), "09AZaz");
@@ -360,7 +360,7 @@ TEST_CASE_END(buf_peek_s8)
 
 TEST_CASE(buf_peek_s16)
 {
-  s8 b[8];
+  char b[8];
   s_buf buf;
   s16 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -437,7 +437,7 @@ TEST_CASE_END(buf_read_character_utf8)
 
 TEST_CASE(buf_read_f32)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   f32 f;
   buf_init(&buf, false, sizeof(b), b);
@@ -467,7 +467,7 @@ TEST_CASE_END(buf_read_character_utf8)
 
 TEST_CASE(buf_read_f64)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   f64 f;
   buf_init(&buf, false, sizeof(b), b);
@@ -540,7 +540,7 @@ TEST_CASE_END(buf_read_s8)
 
 TEST_CASE(buf_read_s16)
 {
-  s8 b[8];
+  char b[8];
   s_buf buf;
   s16 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -565,7 +565,7 @@ TEST_CASE_END(buf_read_s16)
 
 TEST_CASE(buf_read_s32)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   s32 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -595,7 +595,7 @@ TEST_CASE_END(buf_read_s16)
 
 TEST_CASE(buf_read_s64)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   s64 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -668,7 +668,7 @@ TEST_CASE_END(buf_read_u8)
 
 TEST_CASE(buf_read_u16)
 {
-  s8 b[8];
+  char b[8];
   s_buf buf;
   u16 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -698,7 +698,7 @@ TEST_CASE_END(buf_read_u8)
 
 TEST_CASE(buf_read_u32)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   u32 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -728,7 +728,7 @@ TEST_CASE_END(buf_read_u8)
 
 TEST_CASE(buf_read_u64)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   u64 val;
   buf_init(&buf, false, sizeof(b), b);
@@ -758,7 +758,7 @@ TEST_CASE_END(buf_read_u8)
 
 TEST_CASE(buf_write_s8)
 {
-  s8 b[4];
+  char b[4];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_s8(&buf, 0x00), 1);
@@ -782,7 +782,7 @@ TEST_CASE_END(buf_write_s8)
 
 TEST_CASE(buf_write_s16)
 {
-  s8 b[8];
+  char b[8];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_s16(&buf, 0x0000), 2);
@@ -806,7 +806,7 @@ TEST_CASE_END(buf_write_s16)
 
 TEST_CASE(buf_write_s32)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_s32(&buf, 0x00000000), 4);
@@ -830,7 +830,7 @@ TEST_CASE_END(buf_write_s32)
 
 TEST_CASE(buf_write_s64)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_s64(&buf, 0x0000000000000000), 8);
@@ -854,7 +854,7 @@ TEST_CASE_END(buf_write_s64)
 
 TEST_CASE(buf_write_u8)
 {
-  s8 b[4];
+  char b[4];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_u8(&buf, 0x00), 1);
@@ -878,7 +878,7 @@ TEST_CASE_END(buf_write_u8)
 
 TEST_CASE(buf_write_u16)
 {
-  s8 b[8];
+  char b[8];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_u16(&buf, 0x0000), 2);
@@ -902,7 +902,7 @@ TEST_CASE_END(buf_write_u16)
 
 TEST_CASE(buf_write_u32)
 {
-  s8 b[16];
+  char b[16];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_u32(&buf, 0x00000000), 4);
@@ -926,7 +926,7 @@ TEST_CASE_END(buf_write_u32)
 
 TEST_CASE(buf_write_u64)
 {
-  s8 b[32];
+  char b[32];
   s_buf buf;
   buf_init(&buf, false, sizeof(b), b);
   TEST_EQ(buf_write_u64(&buf, 0x0000000000000000), 8);
@@ -955,9 +955,9 @@ TEST_CASE_END(buf_write_str)
 
 TEST_CASE(buf_xfer)
 {
-  s8 d[16];
+  char d[16];
   s_buf dest;
-  s8 s[16] = "0123456789ABCDEF";
+  char s[16] = "0123456789ABCDEF";
   s_buf src;
   buf_init(&src, false, sizeof(s), s);
   src.wpos = 16;
diff --git a/test/character_test.c b/test/character_test.c
index 987d39b..55f6025 100644
--- a/test/character_test.c
+++ b/test/character_test.c
@@ -240,9 +240,8 @@ TEST_CASE_END(character_utf8)
 
 TEST_CASE(character_utf8_size)
 {
-  character c;
-  for (c = -10; c < 0; c++)
-    TEST_EQ(character_utf8_size(c), -1);
+  TEST_EQ(character_utf8_size((character) -1), -1);
+  TEST_EQ(character_utf8_size(0), 1);
   TEST_EQ(character_utf8_size('_'), 1);
   TEST_EQ(character_utf8_size('0'), 1);
   TEST_EQ(character_utf8_size('1'), 1);
diff --git a/test/fact_test.c b/test/fact_test.c
index a45b3ba..e93d524 100644
--- a/test/fact_test.c
+++ b/test/fact_test.c
@@ -50,15 +50,15 @@ void fact_test_clean_3 (s_fact *fact)
   tag_delete((s_tag *) fact->object);
 }
 
-s_fact * fact_test_init_1 (s_fact *fact, const s8 *tag)
+s_fact * fact_test_init_1 (s_fact *fact, const char *tag)
 {
   assert(fact);
   fact->subject = fact->predicate = fact->object = tag_new_1(tag);
   return fact;
 }
 
-s_fact * fact_test_init_3 (s_fact *fact, const s8 *subject,
-                           const s8 *predicate, const s8 *object)
+s_fact * fact_test_init_3 (s_fact *fact, const char *subject,
+                           const char *predicate, const char *object)
 {
   assert(fact);
   fact->subject   = tag_new_1(subject);
diff --git a/test/fact_test.h b/test/fact_test.h
index 1001316..7281a1a 100644
--- a/test/fact_test.h
+++ b/test/fact_test.h
@@ -35,8 +35,8 @@
              "Expected %s got %s.%s\n",                                \
              TEST_COLOR_KO,                                            \
              __FILE__, __LINE__, __func__,                             \
-             str_test.ptr.ps8, str_expected.ptr.ps8,                   \
-             str_expected.ptr.ps8, str_test.ptr.ps8,                   \
+             str_test.ptr.pchar, str_expected.ptr.pchar,               \
+             str_expected.ptr.pchar, str_test.ptr.pchar,               \
              TEST_COLOR_RESET);                                        \
       str_clean(&str_expected);                                        \
       str_clean(&str_test);                                            \
@@ -46,8 +46,8 @@
 
 void     fact_test_clean_1 (s_fact *fact);
 void     fact_test_clean_3 (s_fact *fact);
-s_fact * fact_test_init_1 (s_fact *fact, const s8 *tag);
-s_fact * fact_test_init_3 (s_fact *fact, const s8 *subject,
-                           const s8 *predicate, const s8 *object);
+s_fact * fact_test_init_1 (s_fact *fact, const char *tag);
+s_fact * fact_test_init_3 (s_fact *fact, const char *subject,
+                           const char *predicate, const char *object);
 
 #endif /* FACT_TEST_H */
diff --git a/test/facts_cursor_test.c b/test/facts_cursor_test.c
index 5c6c12f..29e82b4 100644
--- a/test/facts_cursor_test.c
+++ b/test/facts_cursor_test.c
@@ -30,7 +30,7 @@ TEST_CASE(facts_cursor_init)
 {
   s_facts_cursor cursor;
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "0",
     "1",
     "10",
@@ -113,7 +113,7 @@ TEST_CASE(facts_cursor_next)
 {
   s_facts_cursor cursor;
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "-0x10000000000000000",
     "-0x100000000",
     "-0x10000",
diff --git a/test/facts_test.c b/test/facts_test.c
index 2feb119..de7c8cc 100644
--- a/test/facts_test.c
+++ b/test/facts_test.c
@@ -51,7 +51,7 @@ void facts_test (void)
 TEST_CASE(facts_add)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -105,7 +105,7 @@ TEST_CASE_END(facts_add)
 TEST_CASE(facts_dump_file)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -156,7 +156,7 @@ TEST_CASE_END(facts_dump_file)
 TEST_CASE(facts_find)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -226,7 +226,7 @@ TEST_CASE_END(facts_init_clean)
 TEST_CASE(facts_load)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -272,7 +272,7 @@ TEST_CASE_END(facts_load)
 TEST_CASE(facts_log_add)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -323,7 +323,7 @@ TEST_CASE_END(facts_log_add)
 TEST_CASE(facts_log_remove)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -392,7 +392,7 @@ TEST_CASE_END(facts_new_delete)
 TEST_CASE(facts_open_file)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -418,7 +418,7 @@ TEST_CASE(facts_open_file)
     "-0x10000000000000000",
     NULL
   };
-  s8 *q[24] = {
+  char *q[24] = {
     "\"b\"",
     ":b",
     "B",
@@ -547,7 +547,7 @@ TEST_CASE_END(facts_open_file)
 TEST_CASE(facts_remove)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -597,7 +597,7 @@ TEST_CASE_END(facts_remove)
 TEST_CASE(facts_save)
 {
   uw i = 0;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
diff --git a/test/facts_with_test.c b/test/facts_with_test.c
index 978b4e7..d85cae7 100644
--- a/test/facts_with_test.c
+++ b/test/facts_with_test.c
@@ -35,7 +35,7 @@ TEST_CASE(facts_with_)
   s_facts facts;
   sw i = 0;
   s_tag object;
-  const s8 *p[9] = { "A", "B", "C", "D", "E", "F", "G", "H", NULL };
+  const char *p[9] = { "A", "B", "C", "D", "E", "F", "G", "H", NULL };
   s_tag predicate;
   s_tag subject;
   s_tag tag[8];
@@ -186,7 +186,7 @@ TEST_CASE(facts_with_tags)
   s_facts facts;
   sw i = 0;
   s_tag object;
-  const s8 *p[9] = { "A", "B", "C", "D", "E", "F", "G", "H", NULL };
+  const char *p[9] = { "A", "B", "C", "D", "E", "F", "G", "H", NULL };
   s_tag predicate;
   s_tag subject;
   s_tag tag[8];
diff --git a/test/set__fact_test.c b/test/set__fact_test.c
index 813746f..c75d396 100644
--- a/test/set__fact_test.c
+++ b/test/set__fact_test.c
@@ -92,7 +92,7 @@ TEST_CASE(set__fact_add)
 {
   s_fact fact[24];
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -140,7 +140,7 @@ TEST_CASE_END(set__fact_add)
 TEST_CASE(set__fact_cursor)
 {
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -225,7 +225,7 @@ TEST_CASE_END(set__fact_init_clean)
 TEST_CASE(set__fact_remove)
 {
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -272,7 +272,7 @@ TEST_CASE_END(set__fact_remove)
 TEST_CASE(set__fact_resize)
 {
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
diff --git a/test/set__tag_test.c b/test/set__tag_test.c
index 2619411..7d4463c 100644
--- a/test/set__tag_test.c
+++ b/test/set__tag_test.c
@@ -113,7 +113,7 @@ void set__tag_test (void)
 TEST_CASE(set__tag_add)
 {
   uw i = 0;
-  const s8 *p[] = {
+  const char *p[] = {
     "false",
     "true",
     "'a'",
diff --git a/test/skiplist__fact_test.c b/test/skiplist__fact_test.c
index ba5cb9a..7b2c420 100644
--- a/test/skiplist__fact_test.c
+++ b/test/skiplist__fact_test.c
@@ -68,7 +68,7 @@ TEST_CASE(skiplist__fact_find)
   const u8 *h;
   const u8 height[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 0};
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -126,7 +126,7 @@ TEST_CASE(skiplist__fact_insert)
   const u8 height[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 0};
   const double *s;
   const double spacing[] = {2.0, 2.4, 3.0, 0.0};
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
@@ -198,7 +198,7 @@ TEST_CASE(skiplist__fact_remove)
   const u8 *h;
   const u8 height[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 0};
   sw i;
-  s8 *p[24] = {
+  char *p[24] = {
     "\"a\"",
     ":a",
     "A",
diff --git a/test/str_test.c b/test/str_test.c
index a8e7f04..f114bdd 100644
--- a/test/str_test.c
+++ b/test/str_test.c
@@ -209,7 +209,7 @@ TEST_CASE_END(str_init_copy_1)
 TEST_CASE(str_inspect)
 {
   s_str str;
-  s8 zero[16] = {0};
+  char zero[16] = {0};
   STR_TEST_INSPECT_1("", "\"\"");
   STR_TEST_INSPECT_1(" ", "\" \"");
   STR_TEST_INSPECT_1("\n", "\"\\n\"");
@@ -351,7 +351,7 @@ TEST_CASE_END(str_new_f)
 
 TEST_CASE(str_to_hex)
 {
-  s8 zero[32] = {0};
+  char zero[32] = {0};
   STR_TEST_TO_HEX(str_new_1(NULL, ""), "");
   STR_TEST_TO_HEX(str_new(NULL,  1, zero), "00");
   STR_TEST_TO_HEX(str_new(NULL,  2, zero), "0000");