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#include <assert.h> /* assert */
#include <string.h> /* memcpy, strcpy, strncat, strndup */
/* "Checked" memcpy */
void *__memcpy_chk(void *dest, const void *src, size_t len, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(len <= destlen);
if(src < dest)
{
assert(!(src + len >= dest));
} else {
assert(!(dest + len >= src));
}
return memcpy(dest, src, len);
}
/* "Checked" strncat */
char *__strncat_chk(char *dest, const char *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(n <= destlen);
return strncat(dest, src, n);
}
/* "Checked" strcat */
char *__strcat_chk(char *dest, const char *src, size_t destlen)
{
return strncat(dest, src, destlen - 1);
}
/* "Checked" strncpy */
char *__strncpy_chk(char *dest, const char *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(strlen(src) < destlen);
return strncpy(dest, src, n);
}
/* "Checked" strcpy */
char *__strcpy_chk(char *dest, const char *src, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(strlen(src) < destlen);
return strcpy(dest, src);
}
/* Literally a useless __ alias. */
char *__strndup(const char *str, size_t count)
{
return strndup(str, count);
}
/* The existance of this method, and the fact it is used in real code, gives
* me nightmares. */
void *rawmemchr(const void *s, int c)
{
const unsigned char *haystack = s;
unsigned char needle = (unsigned char)c;
while(*haystack++ != needle);
return (void *)haystack;
}
extern __typeof(rawmemchr) __rawmemchr __attribute__((weak, alias("rawmemchr")));
/* Another useless __ alias */
char *__strtok_r(char *str, const char *delim, char **saveptr)
{
return strtok_r(str, delim, saveptr);
}
/* The "global" definition of strsep in glibc, used when architecture dependent
* assembler versions aren't good enough. */
char *__strsep_g(char **stringp, const char *delim)
{
return strsep(stringp, delim);
}
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