memchr
Finds characters in a buffer.
void*memchr(constvoid*buf,intc**,size_tcount);**
| Routine | Required Header | Compatibility |
| memchr | <memory.h> or <string.h> | ANSI, Win 95, Win NT |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
| LIBC.LIB | Single thread static library, retail version |
| LIBCMT.LIB | Multithread static library, retail version |
| MSVCRT.LIB | Import library for MSVCRT.DLL, retail version |
Return Value
If successful, memchr returns a pointer to the first location of c in buf. Otherwise it returns NULL.
Parameters
buf
Pointer to buffer
c
Character to look for
count
Number of characters to check
Remarks
The memchr function looks for the first occurrence of c in the first count bytes of buf. It stops when it finds c or when it has checked the first count bytes.
Example
/* MEMCHR.C */
#include <memory.h>
#include <stdio.h>
int ch = 'r';
char str[] = "lazy";
char string[] = "The quick brown dog jumps over the lazy fox";
char fmt1[] = " 1 2 3 4 5";
char fmt2[] = "12345678901234567890123456789012345678901234567890";
void main( void )
{
char *pdest;
int result;
printf( "String to be searched:\n\t\t%s\n", string );
printf( "\t\t%s\n\t\t%s\n\n", fmt1, fmt2 );
printf( "Search char:\t%c\n", ch );
pdest = memchr( string, ch, sizeof( string ) );
result = pdest - string + 1;
if( pdest != NULL )
printf( "Result:\t\t%c found at position %d\n\n", ch, result );
else
printf( "Result:\t\t%c not found\n" );
}
Output
String to be searched:
The quick brown dog jumps over the lazy fox
1 2 3 4 5
12345678901234567890123456789012345678901234567890
Search char: r
Result: r found at position 12