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memchr

Visual Studio 6.0

Finds characters in a buffer.

void *memchr( const void *buf, int c, size_t count );

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

Buffer Manipulation Routines

See Also   _memccpy, memcmp, memcpy, memset, strchr

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