memchr, _fmemchr

Searches n bytes for character c.

Defined in header <mem.h>

Syntax

#include <mem.h>
Near  version: void  *memchr    (const void  *s, int c, size_t n);
Far version: void  far * far _fmemchr(const     void  far *s, int c, size_t n);

Portability

Remarks

memchr is available on UNIX System V systems.

memchr searches the first n bytes of the block pointed to by s for character c.

Return value

On success, memchr returns a pointer to the first occurrence of c in s; otherwise, it returns null.

Example

include  <string.h>
#include <stdio.h>
int main (void)
{
   char str[17], *ptr;

   strcpy(str,  "This is a string");
   ptr =  (char *) memchr(str, 'r', strlen(str));
   if (ptr)
      printf("The character  'r' is at"
             " position:  %d\n", ptr - str);
   else
      printf("The character was  not found\n");
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• cppreference (search)
• POSIX (search)
• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Extraction notes

• heading `memchr, _fmennchr` read as `memchr, _fmemchr`

Stable link: /3.1/mem.h/memchr/ · short form /3.1/memchr/