kc3-lang/kc3

diff --git a/libc3/facts.c b/libc3/facts.c
index 1c8293d..fcc5d5f 100644
--- a/libc3/facts.c
+++ b/libc3/facts.c
@@ -25,6 +25,7 @@
 #include "facts_cursor.h"
 #include "facts_with.h"
 #include "hash.h"
+#include "log.h"
 #include "set__fact.h"
 #include "set__tag.h"
 #include "skiplist__fact.h"
@@ -67,7 +68,7 @@ s_fact * facts_add_tags (s_facts *facts, const s_tag *subject,
 void facts_clean (s_facts *facts)
 {
   if (facts->log)
-    buf_file_close(facts->log);
+    facts_close(facts);
   skiplist_delete__fact(facts->index_osp);
   skiplist_delete__fact(facts->index_pos);
   skiplist_delete__fact(facts->index_spo);
@@ -75,6 +76,14 @@ void facts_clean (s_facts *facts)
   set_clean__tag(&facts->tags);
 }
 
+void facts_close (s_facts *facts)
+{
+  assert(facts->log);
+  log_close(facts->log);
+  log_delete(facts->log);
+  facts->log = NULL;
+}
+
 void facts_delete (s_facts *facts)
 {
   assert(facts);
@@ -276,33 +285,39 @@ sw facts_load_file (s_facts *facts, const s8 *path)
   return result;
 }
 
-sw facts_log_add (s_buf *log, const s_fact *fact)
+sw facts_log_add (s_log *log, const s_fact *fact)
 {
   sw r;
   sw result = 0;
-  if ((r = buf_write_1(log, "add ")) < 0)
+  assert(log);
+  assert(fact);
+  if ((r = buf_write_1(&log->buf, "add ")) < 0)
     return r;
   result += r;
-  if ((r = buf_inspect_fact(log, fact)) < 0)
+  hash_update_1(&log->hash, "add");
+  if ((r = buf_inspect_fact(&log->buf, fact)) < 0)
     return r;
   result += r;
-  if ((r = buf_write_1(log, "\n")) < 0)
+  hash_update_fact(&log->hash, fact);
+  if ((r = buf_write_1(&log->buf, "\n")) < 0)
     return r;
   result += r;
   return result;
 }
 
-sw facts_log_remove (s_buf *log, const s_fact *fact)
+sw facts_log_remove (s_log *log, const s_fact *fact)
 {
   sw r;
   sw result = 0;
-  if ((r = buf_write_1(log, "remove ")) < 0)
+  if ((r = buf_write_1(&log->buf, "remove ")) < 0)
     return r;
   result += r;
-  if ((r = buf_inspect_fact(log, fact)) < 0)
+  hash_update_1(&log->hash, "remove");
+  if ((r = buf_inspect_fact(&log->buf, fact)) < 0)
     return r;
   result += r;
-  if ((r = buf_write_1(log, "\n")) < 0)
+  hash_update_fact(&log->hash, fact);
+  if ((r = buf_write_1(&log->buf, "\n")) < 0)
     return r;
   result += r;
   return result;
@@ -334,7 +349,6 @@ sw facts_open_file (s_facts *facts, const s8 *path)
 {
   FILE *fp;
   s_buf in;
-  s_buf *out;
   sw r;
   sw result = 0;
   BUF_INIT_ALLOCA(&in, BUF_SIZE);
@@ -348,13 +362,13 @@ sw facts_open_file (s_facts *facts, const s8 *path)
     return r;
   result += r;
   fclose(fp);
-  if (! (fp = fopen(path, "wb"))) {
+  if (! (fp = fopen(path, "ab"))) {
     warn("fopen: %s", path);
     return -1;
   }
-  out = buf_new_alloc(BUF_SIZE);
-  buf_file_open_w(out, fp);
-  facts->log = out;
+  if (! (facts->log = log_new(BUF_SIZE)))
+    return -1;
+  log_open(facts->log, fp);
   return result;
 }
 
@@ -385,7 +399,9 @@ sw facts_open_file_create (s_facts *facts, const s8 *path)
     return r;
   result += r;
   buf_flush(out);
-  facts->log = out;
+  if (! (facts->log = log_new()))
+    return -1;
+  buf_file_open_w(&facts->log->buf, fp);
   return result;
 }
 
@@ -455,27 +471,30 @@ e_bool facts_remove_fact (s_facts *facts, const s_fact *fact)
 
 sw facts_save_file (s_facts *facts, const s8 *path)
 {
-  s_buf *buf;
+  s_buf buf;
   FILE *fp;
   sw r;
   sw result = 0;
   assert(facts);
   assert(path);
   assert(! facts->log);
-  buf = buf_new_alloc(1024);
+  BUF_INIT_ALLOCA(&buf, BUF_SIZE);
   if (! (fp = fopen(path, "wb"))) {
     warn("fopen: %s", path);
     return -1;
   }
-  buf_file_open_w(buf, fp);
-  if ((r = facts_save_header(buf)) < 0)
+  buf_file_open_w(&buf, fp);
+  if ((r = facts_save_header(&buf)) < 0)
     goto ko;
   result += r;
-  if ((r = facts_dump(facts, buf)) < 0)
+  if ((r = facts_dump(facts, &buf)) < 0)
     goto ko;
   result += r;
-  buf_flush(buf);
-  facts->log = buf;
+  buf_flush(&buf);
+  if (! (facts->log = log_new()))
+    goto ko;
+  if (log_open(facts->log, fp) < 0)
+    goto ko;
   return result;
  ko:
   fclose(fp);
diff --git a/libc3/facts.h b/libc3/facts.h
index 636bd1e..6451a7d 100644
--- a/libc3/facts.h
+++ b/libc3/facts.h
@@ -47,8 +47,8 @@ sw       facts_dump (const s_facts *facts, s_buf *buf);
 sw       facts_dump_file (const s_facts *facts, const s8 *path);
 s_fact * facts_find_fact (const s_facts *facts, const s_fact *fact);
 s_tag *  facts_find_tag (const s_facts *facts, const s_tag *tag);
-sw       facts_log_add (s_buf *log, const s_fact *fact);
-sw       facts_log_remove (s_buf *log, const s_fact *fact);
+sw       facts_log_add (s_log *log, const s_fact *fact);
+sw       facts_log_remove (s_log *log, const s_fact *fact);
 sw       facts_save_header (s_buf *buf);
 
 #endif /* FACTS_H */
diff --git a/libc3/hash.c b/libc3/hash.c
index a8f9b11..4006587 100644
--- a/libc3/hash.c
+++ b/libc3/hash.c
@@ -25,6 +25,11 @@
     hash_update(hash, &x, sizeof(x));                                  \
   }                                                                    \
 
+void hash_clean (t_hash *hash)
+{
+  bzero(hash, sizeof(t_hash));
+}
+
 void hash_init (t_hash *hash)
 {
   assert(hash);
@@ -52,6 +57,13 @@ void hash_update (t_hash *hash, const void *data, uw size)
   SHA1Update(hash, data, size);
 }
 
+void hash_update_1 (t_hash *hash, const s8 *p)
+{
+  assert(hash);
+  assert(p);
+  hash_update(hash, p, strlen(p));
+}
+
 void hash_update_bool (t_hash *hash, e_bool x)
 {
   bool b = x ? 1 : 0;
diff --git a/libc3/hash.h b/libc3/hash.h
index 78c4e08..8d3dce8 100644
--- a/libc3/hash.h
+++ b/libc3/hash.h
@@ -19,10 +19,12 @@
 #define HASH_UPDATE_PROTOTYPE(type)                           \
   void hash_update_##type (t_hash *hash, type x)
 
+void hash_clean (t_hash *hash);
 void hash_init (t_hash *hash);
 uw   hash_to_uw (t_hash *hash);
 u64  hash_to_u64 (t_hash *hash);
 void hash_update (t_hash *hash, const void *data, uw size);
+void hash_update_1 (t_hash *hash, const s8 *p);
 void hash_update_bool (t_hash *hash, e_bool b);
 void hash_update_call (t_hash *hash, const s_call *call);
 void hash_update_fact (t_hash *hash, const s_fact *fact);
diff --git a/libc3/log.c b/libc3/log.c
new file mode 100644
index 0000000..e6517ed
--- /dev/null
+++ b/libc3/log.c
@@ -0,0 +1,63 @@
+/* c3
+ * Copyright 2022 kmx.io <contact@kmx.io>
+ *
+ * Permission is hereby granted to use this software excepted
+ * on Apple computers granted the above copyright notice and
+ * this permission paragraph are included in all copies and
+ * substantial portions of this software.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
+ * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
+ * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
+ * THIS SOFTWARE.
+ */
+#include <assert.h>
+#include "buf.h"
+#include "buf_file.h"
+#include "hash.h"
+#include "log.h"
+
+void log_clean (s_log *log)
+{
+  assert(log);
+  buf_clean(&log->buf);
+  hash_clean(&log->hash);
+}
+
+void log_close (s_log *log)
+{
+  buf_file_close(&log->buf);
+}
+
+void log_delete (s_log *log)
+{
+  assert(log);
+  log_clean(log);
+  free(log);
+}
+
+void log_init (s_log *log)
+{
+  buf_init_alloc(&log->buf, BUF_SIZE);
+  log->count = 0;
+  hash_init(&log->hash);
+}
+
+s_log * log_new ()
+{
+  s_log *log;
+  if (! (log = malloc(sizeof(s_log)))) {
+    warnx("log_new: failed to allocate memory");
+    return NULL;
+  }
+  log_init(log);
+  return log;
+}
+
+sw log_open (s_log *log, FILE *fp)
+{
+  assert(log);
+  assert(fp);
+  buf_file_open_w(&log->buf, fp);
+  return 0;
+}
diff --git a/libc3/log.h b/libc3/log.h
new file mode 100644
index 0000000..905044d
--- /dev/null
+++ b/libc3/log.h
@@ -0,0 +1,33 @@
+/* c3
+ * Copyright 2022 kmx.io <contact@kmx.io>
+ *
+ * Permission is hereby granted to use this software excepted
+ * on Apple computers granted the above copyright notice and
+ * this permission paragraph are included in all copies and
+ * substantial portions of this software.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
+ * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
+ * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
+ * THIS SOFTWARE.
+ */
+#ifndef LOG_H
+#define LOG_H
+
+#include "types.h"
+
+/* stack-allocation compatible functions */
+void log_init (s_log *log);
+void log_clean (s_log *log);
+
+/* constructor */
+s_log * log_new ();
+
+/* destructor */
+void log_delete (s_log *log);
+
+/* modifiers */
+void log_close (s_log *log);
+sw log_open (s_log *log, FILE *fp);
+
+#endif /* C3_H */
diff --git a/libc3/sources.mk b/libc3/sources.mk
index 05b21cd..356db4b 100644
--- a/libc3/sources.mk
+++ b/libc3/sources.mk
@@ -1,3 +1,3 @@
 # sources.mk generated by update_sources
-SOURCES = arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c 
-LO_SOURCES = arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c  ../libtommath/bn_cutoffs.c ../libtommath/bn_deprecated.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_addmod.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_decr.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_expt_u32.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_exteuclid.c ../libtommath/bn_mp_fread.c ../libtommath/bn_mp_from_sbin.c ../libtommath/bn_mp_from_ubin.c ../libtommath/bn_mp_fwrite.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_l.c ../libtommath/bn_mp_get_ll.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_get_mag_ul.c ../libtommath/bn_mp_get_mag_ull.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_incr.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_i32.c ../libtommath/bn_mp_init_i64.c ../libtommath/bn_mp_init_l.c ../libtommath/bn_mp_init_ll.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_set.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_init_u32.c ../libtommath/bn_mp_init_u64.c ../libtommath/bn_mp_init_ul.c ../libtommath/bn_mp_init_ull.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_is_square.c ../libtommath/bn_mp_iseven.c ../libtommath/bn_mp_isodd.c ../libtommath/bn_mp_kronecker.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_log_u32.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_mod_d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_pack.c ../libtommath/bn_mp_pack_count.c ../libtommath/bn_mp_prime_fermat.c ../libtommath/bn_mp_prime_frobenius_underwood.c ../libtommath/bn_mp_prime_is_prime.c ../libtommath/bn_mp_prime_miller_rabin.c ../libtommath/bn_mp_prime_next_prime.c ../libtommath/bn_mp_prime_rabin_miller_trials.c ../libtommath/bn_mp_prime_rand.c ../libtommath/bn_mp_prime_strong_lucas_selfridge.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_radix_smap.c ../libtommath/bn_mp_rand.c ../libtommath/bn_mp_read_radix.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_root_u32.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_sbin_size.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_ll.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_set_ull.c ../libtommath/bn_mp_shrink.c ../libtommath/bn_mp_signed_rsh.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrmod.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sqrtmod_prime.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_submod.c ../libtommath/bn_mp_to_radix.c ../libtommath/bn_mp_to_sbin.c ../libtommath/bn_mp_to_ubin.c ../libtommath/bn_mp_ubin_size.c ../libtommath/bn_mp_unpack.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_prime_tab.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_get_bit.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_prime_is_divisible.c ../libtommath/bn_s_mp_rand_jenkins.c ../libtommath/bn_s_mp_reverse.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c 
+SOURCES = arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c log.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c 
+LO_SOURCES = arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c log.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c  ../libtommath/bn_cutoffs.c ../libtommath/bn_deprecated.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_addmod.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_decr.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_expt_u32.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_exteuclid.c ../libtommath/bn_mp_fread.c ../libtommath/bn_mp_from_sbin.c ../libtommath/bn_mp_from_ubin.c ../libtommath/bn_mp_fwrite.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_l.c ../libtommath/bn_mp_get_ll.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_get_mag_ul.c ../libtommath/bn_mp_get_mag_ull.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_incr.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_i32.c ../libtommath/bn_mp_init_i64.c ../libtommath/bn_mp_init_l.c ../libtommath/bn_mp_init_ll.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_set.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_init_u32.c ../libtommath/bn_mp_init_u64.c ../libtommath/bn_mp_init_ul.c ../libtommath/bn_mp_init_ull.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_is_square.c ../libtommath/bn_mp_iseven.c ../libtommath/bn_mp_isodd.c ../libtommath/bn_mp_kronecker.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_log_u32.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_mod_d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_pack.c ../libtommath/bn_mp_pack_count.c ../libtommath/bn_mp_prime_fermat.c ../libtommath/bn_mp_prime_frobenius_underwood.c ../libtommath/bn_mp_prime_is_prime.c ../libtommath/bn_mp_prime_miller_rabin.c ../libtommath/bn_mp_prime_next_prime.c ../libtommath/bn_mp_prime_rabin_miller_trials.c ../libtommath/bn_mp_prime_rand.c ../libtommath/bn_mp_prime_strong_lucas_selfridge.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_radix_smap.c ../libtommath/bn_mp_rand.c ../libtommath/bn_mp_read_radix.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_root_u32.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_sbin_size.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_ll.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_set_ull.c ../libtommath/bn_mp_shrink.c ../libtommath/bn_mp_signed_rsh.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrmod.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sqrtmod_prime.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_submod.c ../libtommath/bn_mp_to_radix.c ../libtommath/bn_mp_to_sbin.c ../libtommath/bn_mp_to_ubin.c ../libtommath/bn_mp_ubin_size.c ../libtommath/bn_mp_unpack.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_prime_tab.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_get_bit.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_prime_is_divisible.c ../libtommath/bn_s_mp_rand_jenkins.c ../libtommath/bn_s_mp_reverse.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c 
diff --git a/libc3/sources.sh b/libc3/sources.sh
index d8e0645..8c2cb53 100644
--- a/libc3/sources.sh
+++ b/libc3/sources.sh
@@ -1,3 +1,3 @@
 # sources.sh generated by update_sources
-SOURCES='arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c '
-LO_SOURCES='arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c  ../libtommath/bn_cutoffs.c ../libtommath/bn_deprecated.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_addmod.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_decr.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_expt_u32.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_exteuclid.c ../libtommath/bn_mp_fread.c ../libtommath/bn_mp_from_sbin.c ../libtommath/bn_mp_from_ubin.c ../libtommath/bn_mp_fwrite.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_l.c ../libtommath/bn_mp_get_ll.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_get_mag_ul.c ../libtommath/bn_mp_get_mag_ull.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_incr.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_i32.c ../libtommath/bn_mp_init_i64.c ../libtommath/bn_mp_init_l.c ../libtommath/bn_mp_init_ll.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_set.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_init_u32.c ../libtommath/bn_mp_init_u64.c ../libtommath/bn_mp_init_ul.c ../libtommath/bn_mp_init_ull.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_is_square.c ../libtommath/bn_mp_iseven.c ../libtommath/bn_mp_isodd.c ../libtommath/bn_mp_kronecker.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_log_u32.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_mod_d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_pack.c ../libtommath/bn_mp_pack_count.c ../libtommath/bn_mp_prime_fermat.c ../libtommath/bn_mp_prime_frobenius_underwood.c ../libtommath/bn_mp_prime_is_prime.c ../libtommath/bn_mp_prime_miller_rabin.c ../libtommath/bn_mp_prime_next_prime.c ../libtommath/bn_mp_prime_rabin_miller_trials.c ../libtommath/bn_mp_prime_rand.c ../libtommath/bn_mp_prime_strong_lucas_selfridge.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_radix_smap.c ../libtommath/bn_mp_rand.c ../libtommath/bn_mp_read_radix.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_root_u32.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_sbin_size.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_ll.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_set_ull.c ../libtommath/bn_mp_shrink.c ../libtommath/bn_mp_signed_rsh.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrmod.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sqrtmod_prime.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_submod.c ../libtommath/bn_mp_to_radix.c ../libtommath/bn_mp_to_sbin.c ../libtommath/bn_mp_to_ubin.c ../libtommath/bn_mp_ubin_size.c ../libtommath/bn_mp_unpack.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_prime_tab.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_get_bit.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_prime_is_divisible.c ../libtommath/bn_s_mp_rand_jenkins.c ../libtommath/bn_s_mp_reverse.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c '
+SOURCES='arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c log.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c '
+LO_SOURCES='arg.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_parse.c buf_parse_c.c buf_save.c c3.c call.c character.c compare.c debug.c env.c error.c error_handler.c eval.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c fn.c frame.c hash.c ident.c integer.c list.c log.c quote.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c skiplist__fact.c skiplist_node__fact.c str.c sym.c tag.c tuple.c ucd.c  ../libtommath/bn_cutoffs.c ../libtommath/bn_deprecated.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_addmod.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_decr.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_expt_u32.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_exteuclid.c ../libtommath/bn_mp_fread.c ../libtommath/bn_mp_from_sbin.c ../libtommath/bn_mp_from_ubin.c ../libtommath/bn_mp_fwrite.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_l.c ../libtommath/bn_mp_get_ll.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_get_mag_ul.c ../libtommath/bn_mp_get_mag_ull.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_incr.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_i32.c ../libtommath/bn_mp_init_i64.c ../libtommath/bn_mp_init_l.c ../libtommath/bn_mp_init_ll.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_set.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_init_u32.c ../libtommath/bn_mp_init_u64.c ../libtommath/bn_mp_init_ul.c ../libtommath/bn_mp_init_ull.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_is_square.c ../libtommath/bn_mp_iseven.c ../libtommath/bn_mp_isodd.c ../libtommath/bn_mp_kronecker.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_log_u32.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_mod_d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_pack.c ../libtommath/bn_mp_pack_count.c ../libtommath/bn_mp_prime_fermat.c ../libtommath/bn_mp_prime_frobenius_underwood.c ../libtommath/bn_mp_prime_is_prime.c ../libtommath/bn_mp_prime_miller_rabin.c ../libtommath/bn_mp_prime_next_prime.c ../libtommath/bn_mp_prime_rabin_miller_trials.c ../libtommath/bn_mp_prime_rand.c ../libtommath/bn_mp_prime_strong_lucas_selfridge.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_radix_smap.c ../libtommath/bn_mp_rand.c ../libtommath/bn_mp_read_radix.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_root_u32.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_sbin_size.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_ll.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_set_ull.c ../libtommath/bn_mp_shrink.c ../libtommath/bn_mp_signed_rsh.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrmod.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sqrtmod_prime.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_submod.c ../libtommath/bn_mp_to_radix.c ../libtommath/bn_mp_to_sbin.c ../libtommath/bn_mp_to_ubin.c ../libtommath/bn_mp_ubin_size.c ../libtommath/bn_mp_unpack.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_prime_tab.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_get_bit.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_prime_is_divisible.c ../libtommath/bn_s_mp_rand_jenkins.c ../libtommath/bn_s_mp_reverse.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c '
diff --git a/libc3/types.h b/libc3/types.h
index ddb10e7..5ce58b7 100644
--- a/libc3/types.h
+++ b/libc3/types.h
@@ -99,6 +99,7 @@ typedef struct ident                   s_ident;
 typedef struct integer                 s_integer;
 typedef struct list                    s_list;
 typedef struct list                    s_list_map;
+typedef struct log                     s_log;
 typedef struct module                  s_module;
 typedef struct str                     s_str;
 typedef struct sym                     s_sym;
@@ -257,6 +258,12 @@ struct env {
   s_unwind_protect *unwind_protect;
 };
 
+struct log {
+  s_buf  buf;
+  u64    count;
+  t_hash hash;
+};
+
 struct sym {
   s_str str;
 };
@@ -359,7 +366,7 @@ TYPEDEF_SKIPLIST_NODE(fact, s_fact *);
   } s_skiplist__##name
 
 TYPEDEF_SKIPLIST(fact, s_fact *);
-
+  
 /* 5 */
 struct facts {
   s_set__tag        tags;
@@ -367,9 +374,7 @@ struct facts {
   s_skiplist__fact *index_spo;
   s_skiplist__fact *index_pos;
   s_skiplist__fact *index_osp;
-  s_buf            *log;
-  u64               log_count;
-  t_hash            log_hash;
+  s_log            *log;
 };
 
 struct facts_cursor {
diff --git a/test/facts_test.c b/test/facts_test.c
index 74793f3..bd0b3e5 100644
--- a/test/facts_test.c
+++ b/test/facts_test.c
@@ -16,6 +16,7 @@
 #include "../libc3/buf.h"
 #include "../libc3/compare.h"
 #include "../libc3/facts.h"
+#include "../libc3/log.h"
 #include "fact_test.h"
 #include "test.h"
 
@@ -295,12 +296,10 @@ void facts_test_log_add ()
   s_fact fact[24];
   s_facts facts;
   FILE *fp;
-  s_buf log;
-  BUF_INIT_ALLOCA(&log, 1024);
   fp = fopen("facts_test_log_add.facts", "w");
-  buf_file_open_w(&log, fp);
   facts_init(&facts);
-  facts.log = &log;
+  facts.log = log_new();
+  log_open(facts.log, fp);
   while (p[i]) {
     fact_test_init_1(fact + i, p[i]);
     facts_add_fact(&facts, fact + i);
@@ -347,12 +346,10 @@ void facts_test_log_remove ()
   s_fact fact[24];
   s_facts facts;
   FILE *fp;
-  s_buf log;
-  BUF_INIT_ALLOCA(&log, 1024);
   fp = fopen("facts_test_log_remove.facts", "w");
-  buf_file_open_w(&log, fp);
   facts_init(&facts);
-  facts.log = &log;
+  facts.log = log_new();
+  log_open(facts.log, fp);
   while (p[i]) {
     fact_test_init_1(fact + i, p[i]);
     facts_add_fact(&facts, fact + i);
@@ -367,7 +364,6 @@ void facts_test_log_remove ()
     i++;
   }
   facts_clean(&facts);
-  buf_file_close(&log);
   fclose(fp);
   test_file_compare("facts_test_log_remove.facts",
                     "facts_test_log_remove.facts.expected");