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- #include <string.h>
- #include <stdlib.h>
- extern "C" size_t __strlen_chk(const char *s, size_t s_len);
- extern "C" char *__strncat_chk (char *dest, const char *src,
- size_t len, size_t dest_buf_size)
- {
- if (len == 0) {
- return dest;
- }
- size_t dest_len = __strlen_chk(dest, dest_buf_size);
- char *d = dest + dest_len;
- dest_buf_size -= dest_len;
- while (*src != '\0') {
- *d++ = *src++;
- len--; dest_buf_size--;
- if (__predict_false(dest_buf_size == 0)) {
-
- abort();
- }
- if (len == 0) {
- break;
- }
- }
- *d = '\0';
- return dest;
- }
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