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Convert all variable length arrays to heap allocations

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VLA's are inherently unsafe so the safest option is to not use them
This commit is contained in:
jfreegman
2020-10-28 00:54:06 -04:00
parent ff1620c923
commit 2b43340c90
12 changed files with 355 additions and 69 deletions
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54
src/autocomplete.c
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@ -38,20 +38,32 @@
#include "execute.h"
#include "configdir.h"
static void print_matches(ToxWindow *self, Tox *m, const void *list, size_t n_items, size_t size)
static void print_ac_matches(ToxWindow *self, Tox *m, char **list, size_t n_matches)
{
if (m) {
execute(self->chatwin->history, self, m, "/clear", GLOBAL_COMMAND_MODE);
}
const char *L = (char *) list;
int i;
for (size_t i = 0; i < n_matches; ++i) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "%s", list[i]);
}
for (i = 0; i < n_items; ++i) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "");
}
static void print_dir_matches(ToxWindow *self, Tox *m, const void *list, size_t n_items, size_t size)
{
if (m) {
execute(self->chatwin->history, self, m, "/clear", GLOBAL_COMMAND_MODE);
}
const char *L = (char *)list;
for (size_t i = 0; i < n_items; ++i) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "%s", &L[i * size]);
}
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, ""); /* formatting */
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "");
}
/* puts match in match buffer. if more than one match, add first n chars that are identical.
@ -59,21 +71,19 @@ static void print_matches(ToxWindow *self, Tox *m, const void *list, size_t n_it
*
* Returns the length of the match.
*/
static size_t get_str_match(ToxWindow *self, char *match, size_t match_sz, char (*matches)[MAX_STR_SIZE], int n)
static size_t get_str_match(ToxWindow *self, char *match, size_t match_sz, char **matches, size_t n_items,
size_t max_size)
{
UNUSED_VAR(self);
if (n == 1) {
if (n_items == 1) {
return snprintf(match, match_sz, "%s", matches[0]);
}
int i;
for (i = 0; i < MAX_STR_SIZE; ++i) {
for (size_t i = 0; i < max_size; ++i) {
char ch1 = matches[0][i];
int j;
for (j = 0; j < n; ++j) {
for (size_t j = 0; j < n_items; ++j) {
char ch2 = matches[j][i];
if (ch1 != ch2 || !ch1) {
@ -102,7 +112,7 @@ static size_t get_str_match(ToxWindow *self, char *match, size_t match_sz, char
*
* Note: This function should not be called directly. Use complete_line() and complete_path() instead.
*/
static int complete_line_helper(ToxWindow *self, const void *list, size_t n_items, size_t size, bool dir_search)
static int complete_line_helper(ToxWindow *self, const void *list, const size_t n_items, size_t size, bool dir_search)
{
ChatContext *ctx = self->chatwin;
@ -161,7 +171,14 @@ static int complete_line_helper(ToxWindow *self, const void *list, size_t n_item
int s_len = strlen(sub);
size_t n_matches = 0;
char matches[n_items][MAX_STR_SIZE];
char **matches = (char **)malloc_ptr_array(n_items, MAX_STR_SIZE, sizeof(char *));
if (matches == NULL) {
free(sub);
return -1;
}
int i = 0;
/* put all list matches in matches array */
@ -177,15 +194,18 @@ static int complete_line_helper(ToxWindow *self, const void *list, size_t n_item
free(sub);
if (!n_matches) {
free_ptr_array((void **) matches, n_items);
return -1;
}
if (!dir_search && n_matches > 1) {
print_matches(self, NULL, matches, n_matches, MAX_STR_SIZE);
print_ac_matches(self, NULL, matches, n_matches);
}
char match[MAX_STR_SIZE];
size_t match_len = get_str_match(self, match, sizeof(match), matches, n_matches);
size_t match_len = get_str_match(self, match, sizeof(match), matches, n_matches, MAX_STR_SIZE);
free_ptr_array((void **) matches, n_items);
if (match_len == 0) {
return 0;
@ -365,7 +385,7 @@ int dir_match(ToxWindow *self, Tox *m, const wchar_t *line, const wchar_t *cmd)
if (dircount > 1) {
qsort(dirnames, dircount, NAME_MAX + 1, qsort_strcasecmp_hlpr);
print_matches(self, m, dirnames, dircount, NAME_MAX + 1);
print_dir_matches(self, m, dirnames, dircount, NAME_MAX + 1);
}
return complete_path(self, dirnames, dircount, NAME_MAX + 1);