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Issue #195: use uselocale() instead of setlocale() in json_tokener to behave better in threaded environments.

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This commit is contained in:
Eric Haszlakiewicz
2016-07-30 21:34:58 -04:00
parent 7d637362b7
commit 4091b9c87e
3 changed files with 45 additions and 11 deletions
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43
json_tokener.c
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@@ -235,12 +235,11 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
{
struct json_object *obj = NULL;
char c = '\1';
#ifdef HAVE_SETLOCALE
char *oldlocale=NULL, *tmplocale;
tmplocale = setlocale(LC_NUMERIC, NULL);
if (tmplocale) oldlocale = strdup(tmplocale);
setlocale(LC_NUMERIC, "C");
#ifdef HAVE_USELOCALE
locale_t oldlocale = uselocale(NULL);
locale_t newloc;
#elif defined(HAVE_SETLOCALE)
char *oldlocale = NULL;
#endif
tok->char_offset = 0;
@@ -253,12 +252,32 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
the string length is less than INT32_MAX (2GB) */
if ((len < -1) || (len == -1 && strlen(str) > INT32_MAX)) {
tok->err = json_tokener_error_size;
#ifdef HAVE_SETLOCALE
free(oldlocale);
#endif
return NULL;
}
#ifdef HAVE_USELOCALE
{
locale_t duploc = duplocale(oldlocale);
newloc = newlocale(LC_NUMERIC, "C", duploc);
// XXX at least Debian 8.4 has a bug in newlocale where it doesn't
// change the decimal separator unless you set LC_TIME!
if (newloc)
newloc = newlocale(LC_TIME, "C", newloc);
if (newloc == NULL)
{
freelocale(duploc);
return NULL;
}
}
#elif defined(HAVE_SETLOCALE)
{
char *tmplocale;
tmplocale = setlocale(LC_NUMERIC, NULL);
if (tmplocale) oldlocale = strdup(tmplocale);
setlocale(LC_NUMERIC, "C");
}
#endif
while (PEEK_CHAR(c, tok)) {
redo_char:
@@ -887,6 +906,7 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
goto redo_char;
case json_tokener_state_object_sep:
/* { */
if(c == '}') {
saved_state = json_tokener_state_finish;
state = json_tokener_state_eatws;
@@ -918,7 +938,10 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
tok->err = json_tokener_error_parse_eof;
}
#ifdef HAVE_SETLOCALE
#ifdef HAVE_USELOCALE
uselocale(oldlocale);
freelocale(newloc);
#elif defined(HAVE_SETLOCALE)
setlocale(LC_NUMERIC, oldlocale);
free(oldlocale);
#endif