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This code example is noncompliant because the character sequence c_str will not be null-terminated when passed as an argument to printf(). See (see STR11-C. Do not specify the bound of a character array initialized with a string literal.):
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#include <stdio.h>
void func(void) {
char c_str[3] = "abc";
printf("%s\n", c_str);
}
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In this compliant solution, cur_msg will always be null-terminated when passed to wcslen().:
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#include <stdlib.h>
#include <wchar.h>
wchar_t *cur_msg = NULL;
size_t cur_msg_size = 1024;
size_t cur_msg_len = 0;
void lessen_memory_usage(void) {
wchar_t *temp;
size_t temp_size;
/* ... */
if (cur_msg != NULL) {
temp_size = cur_msg_size / 2 + 1;
temp = realloc(cur_msg, temp_size * sizeof(wchar_t));
// temp & cur_msg might not be null-terminated
if (temp == NULL) {
/* Handle error */
}
cur_msg = temp;
// cur_msg now properly null-terminated
cur_msg[temp_size - 1] = L'\0';
cur_msg_size = temp_size;
cur_msg_len = wcslen(cur_msg);
}
} |
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