2017-12-29 07:56:31 +00:00
|
|
|
#include <cstdlib>
|
|
|
|
#include <cstdint>
|
|
|
|
#include <cstring>
|
2015-08-31 03:36:24 +00:00
|
|
|
#include <string>
|
2016-03-04 23:02:44 +00:00
|
|
|
#include "hecl/winsupport.hpp"
|
2015-08-31 03:36:24 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The memmem() function finds the start of the first occurrence of the
|
|
|
|
* substring 'needle' of length 'nlen' in the memory area 'haystack' of
|
|
|
|
* length 'hlen'.
|
|
|
|
*
|
|
|
|
* The return value is a pointer to the beginning of the sub-string, or
|
|
|
|
* NULL if the substring is not found.
|
|
|
|
*/
|
|
|
|
void *memmem(const void *haystack, size_t hlen, const void *needle, size_t nlen)
|
|
|
|
{
|
|
|
|
int needle_first;
|
|
|
|
const uint8_t *p = static_cast<const uint8_t*>(haystack);
|
|
|
|
size_t plen = hlen;
|
|
|
|
|
|
|
|
if (!nlen)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
needle_first = *(unsigned char *)needle;
|
|
|
|
|
|
|
|
while (plen >= nlen && (p = static_cast<const uint8_t*>(memchr(p, needle_first, plen - nlen + 1))))
|
|
|
|
{
|
|
|
|
if (!memcmp(p, needle, nlen))
|
|
|
|
return (void *)p;
|
|
|
|
|
|
|
|
p++;
|
|
|
|
plen = hlen - (p - static_cast<const uint8_t*>(haystack));
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
2017-11-25 02:49:50 +00:00
|
|
|
|
|
|
|
int asprintf(char** buf, const char* format, ...)
|
|
|
|
{
|
|
|
|
va_list ap;
|
|
|
|
va_start(ap, format);
|
|
|
|
int len = vsnprintf(nullptr, 0, format, ap);
|
|
|
|
va_end(ap);
|
|
|
|
*buf = (char*)malloc(len + 1);
|
|
|
|
va_start(ap, format);
|
|
|
|
vsnprintf(*buf, len + 1, format, ap);
|
|
|
|
va_end(ap);
|
|
|
|
return len;
|
|
|
|
}
|