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Fix problem spotted in <4E15F966.4090102@gmx.de>

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* Rename tcc_split_path_components
* Move tcc_split_path below memory wrapper section
* Ident tcc_split_path by 4
* Remove prefix and suffix clutter in tcc_split_path
* Don't dereference beyond the end of the search paths string
This commit is contained in:
Thomas Preud'homme 2011-07-08 10:51:26 +02:00
parent d01f65ef93
commit 13121e220c
1 changed files with 33 additions and 35 deletions
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68
libtcc.c
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@ -247,34 +247,6 @@ PUB_FUNC char *tcc_strdup(const char *str)
return ptr;
}
/* out must not point to a valid dynarray since a new one is created */
PUB_FUNC int tcc_split_path_components(const char *in,
const char * const *prefixs,
int nb_prefixs, char ***out)
{
int i, nb_components = 0;
char *path_component;
const char *end_component;
size_t path_size;
*out = NULL;
end_component = in;
do {
while (*end_component && *end_component != ':')
++end_component;
for (i = 0; i < nb_prefixs; i++) {
path_size = (strlen(prefixs[i]) + 1) * sizeof(char)
+ (end_component - in);
path_component = tcc_malloc(path_size);
pstrcpy(path_component, path_size, prefixs[i]);
pstrcat(path_component, path_size, in);
dynarray_add((void ***) out, &nb_components, path_component);
}
in = ++end_component;
} while (*end_component);
return nb_components;
}
PUB_FUNC void tcc_memstats(void)
{
#ifdef MEM_DEBUG
@ -321,6 +293,33 @@ PUB_FUNC void dynarray_reset(void *pp, int *n)
*(void**)pp = NULL;
}
/* out must not point to a valid dynarray since a new one is created */
PUB_FUNC int tcc_split_path(const char *in, const char * const *prefixs,
int nb_prefixs, char ***out)
{
int i, nb_comps = 0;
char *path;
const char *end;
size_t size;
*out = NULL;
do {
end = in;
while (*end && *end != ':')
++end;
for (i = 0; i < nb_prefixs; i++) {
size = (strlen(prefixs[i]) + 1) * sizeof(char)
+ (end - in);
path = tcc_malloc(size);
pstrcpy(path, size, prefixs[i]);
pstrcat(path, size, in);
dynarray_add((void ***) out, &nb_comps, path);
}
in = end + 1;
} while (*end);
return nb_comps;
}
/* we use our own 'finite' function to avoid potential problems with
non standard math libs */
/* XXX: endianness dependent */
@ -1009,9 +1008,9 @@ LIBTCCAPI TCCState *tcc_new(void)
const char * const lddir_prefixs[] = {lddir_prefix1, lddir_prefix2};
nb_prefixs = sizeof lddir_prefixs / sizeof *lddir_prefixs;
nb_extra_lddirs = tcc_split_path_components(CONFIG_TCC_EXTRA_LDDIR,
lddir_prefixs, nb_prefixs,
&extra_lddirs);
nb_extra_lddirs = tcc_split_path(CONFIG_TCC_EXTRA_LDDIR,
lddir_prefixs, nb_prefixs,
&extra_lddirs);
for (i = 0; i < nb_extra_lddirs; i++)
tcc_add_library_path(s, extra_lddirs[i]);
dynarray_reset(&extra_lddirs, &nb_extra_lddirs);
@ -1337,10 +1336,9 @@ LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
incdir_prefix2};
nb_prefixs = sizeof incdir_prefixs / sizeof *incdir_prefixs;
nb_extra_incdirs = tcc_split_path_components(CONFIG_TCC_INCSUBDIR,
incdir_prefixs,
nb_prefixs,
&extra_incdirs);
nb_extra_incdirs = tcc_split_path(CONFIG_TCC_INCSUBDIR,
incdir_prefixs, nb_prefixs,
&extra_incdirs);
for (i = 0; i < nb_extra_incdirs; i++)
tcc_add_sysinclude_path(s, extra_incdirs[i]);
dynarray_reset(&extra_incdirs, &nb_extra_incdirs);