memchr

Name

memchr - scans memory for a character

Library

libc.lib

Synopsis

#include <string.h>

void * memchr (const void *b, int c, size_t len);

Return values

The memchr function returns a pointer to the byte located, or NULL if no such byte exists within len bytes.

Detailed description

The memchr function locates the first occurrence of c (converted to an unsigned char) in string b.

Examples

#include <string.h>
#include <stdio.h>
int main()
{
    char one[50];
    char* ret;
    strcpy(one,"abcd");
    ret = memchr("abcd", ’c’,4);
    if(!strncmp(one+2,ret,1)) printf("\ ’c\ ’ found in string \"abcd\"\n");
    ret = memchr(one, ’z’,4);
    if(ret == NULL) printf("\ ’z\ ’ not found in string \"abcd\"\n");           
    return 0;
}

Output

 ’c’ found in string "abcd"
 ’z’ not found in string "abcd"

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