strlcpy.cc File Reference

#include <stdio.h>
#include <string.h>
#include "strlcpy.h"

Go to the source code of this file.

Functions
size_t	strlcpy (char *dst, const char *src, size_t size)
size_t	strlcat (char *dst, const char *src, size_t size)

Function Documentation

size_t strlcpy	(	char *	dst,
		const char *	src,
		size_t	size
	)

Definition at line 39 of file strlcpy.cc.

{
   char *d = dst;
   const char *s = src;
   size_t n = size;

   /* Copy as many bytes as will fit */
   if (n != 0 && --n != 0) {
      do {
         if ((*d++ = *s++) == 0)
            break;
      } while (--n != 0);
   }

   /* Not enough room in dst, add NUL and traverse rest of src */
   if (n == 0) {
      if (size != 0)
         *d = '\0';             /* NUL-terminate dst */
      while (*s++);
   }

   return (s - src - 1);        /* count does not include NUL */
}

size_t strlcat	(	char *	dst,
		const char *	src,
		size_t	size
	)

Definition at line 72 of file strlcpy.cc.

{
   char *d = dst;
   const char *s = src;
   size_t n = size;
   size_t dlen;

   /* Find the end of dst and adjust bytes left but don't go past end */
   while (n-- != 0 && *d != '\0')
      d++;
   dlen = d - dst;
   n = size - dlen;

   if (n == 0)
      return (dlen + strlen(s));
   while (*s != '\0') {
      if (n != 1) {
         *d++ = *s;
         n--;
      }
      s++;
   }
   *d = '\0';

   return (dlen + (s - src));   /* count does not include NUL */
}