/* kc3
* Copyright 2022,2023,2024 kmx.io <contact@kmx.io>
*
* Permission is hereby granted to use this software 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 <libkc3/kc3.h>
#include "json.h"
s_tag * json_buf_parse (s_buf *buf, s_tag *dest)
{
character c;
sw r;
s_buf_save save;
s_tag tmp;
assert(buf);
assert(dest);
buf_save_init(buf, &save);
if ((r = buf_peek_character_utf8(buf, &c)) < 0)
return NULL;
switch (c) {
case '{':
return json_buf_parse_map(buf, dest);
case '"':
return json_buf_parse_str(buf, dest);
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '-':
return json_buf_parse_number(buf, dest);
break;
case 't':
case 'f':
return json_buf_parse_bool(buf, dest);
break;
default:
return NULL;
}
*dest = tmp;
return dest;
}
s_tag * json_buf_parse_bool (s_buf *buf, s_tag *dest)
{
sw r;
if ((r = buf_parse_tag_bool(buf, dest)) <= 0)
return NULL;
return dest;
}
s_tag * json_buf_parse_map (s_buf *buf, s_tag *dest)
{
s_list **k;
s_list *keys;
sw r;
s_buf_save save;
s_list **v;
s_list *values;
assert(buf);
assert(dest);
keys = NULL;
k = &keys;
values = NULL;
v = &values;
buf_save_init(buf, &save);
if ((r = buf_read_1(buf, "{")) <= 0)
goto clean;
while (1) {
if ((r = buf_ignore_spaces(buf)) < 0)
goto restore;
if ((r = buf_read_1(buf, "}")) < 0)
goto restore;
if (r > 0)
break;
*k = list_new(NULL);
if (! *k)
goto restore;
if ((r = buf_parse_tag_str(buf, &(*k)->tag)) <= 0)
goto restore;
k = &(*k)->next.data.list;
*v = list_new(NULL);
if (! *v)
goto restore;
if (! json_buf_parse(buf, &(*v)->tag))
goto restore;
v = &(*v)->next.data.list;
}
if (! tag_init_map_from_lists(dest, keys, values))
goto restore;
list_delete_all(keys);
list_delete_all(values);
buf_save_clean(buf, &save);
return dest;
restore:
buf_save_restore_rpos(buf, &save);
clean:
list_delete_all(keys);
list_delete_all(values);
buf_save_clean(buf, &save);
return NULL;
}
s_tag * json_buf_parse_null (s_buf *buf, s_tag *dest)
{
character c;
sw r;
s_buf_save save;
assert(buf);
assert(dest);
buf_save_init(buf, &save);
if ((r = buf_read_1(buf, "null")) <= 0)
goto clean;
if (buf_peek_character_utf8(buf, &c) > 0 &&
! ident_character_is_reserved(c)) {
r = 0;
goto restore;
}
tag_init_void(dest);
buf_save_clean(buf, &save);
return dest;
restore:
buf_save_restore_rpos(buf, &save);
clean:
buf_save_clean(buf, &save);
return NULL;
}
s_tag * json_buf_parse_number (s_buf *buf, s_tag *dest)
{
s_buf_save save;
assert(buf);
assert(dest);
buf_save_init(buf, &save);
if (! buf_parse_tag_number(buf, dest)) {
buf_save_restore_rpos(buf, &save);
return NULL;
}
return dest;
}
s_tag * json_buf_parse_str (s_buf *buf, s_tag *dest)
{
sw r;
if ((r = buf_parse_tag_str(buf, dest)) <= 0)
return NULL;
return dest;
}
s_tag * json_from_str (const s_str *src, s_tag *dest)
{
s_buf buf;
buf_init_str_const(&buf, src);
return json_buf_parse(&buf, dest);
}
