memccpy.c

来自「linux内核」· C语言 代码 · 共 24 行

/*
 * memccpy.c
 *
 * memccpy()
 */

#include <stddef.h>
#include <string.h>

void *memccpy(void *dst, const void *src, int c, size_t n)
{
  char *q = dst;
  const char *p = src;
  char ch;

  while ( n-- ) {
    *q++ = ch = *p++;
    if ( ch == (char)c )
      return q;
  }

  return NULL;			/* No instance of "c" found */
}