Genesis-Plus-GX/libretro/libretro-common/compat/compat_strl.c

/* Copyright  (C) 2010-2018 The RetroArch team
 *
 * ---------------------------------------------------------------------------------------
 * The following license statement only applies to this file (compat_strl.c).
 * ---------------------------------------------------------------------------------------
 *
 * Permission is hereby granted, free of charge,
 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <stdlib.h>
#include <ctype.h>

#include <compat/strl.h>

/* Implementation of strlcpy()/strlcat() based on OpenBSD. */

#ifndef __MACH__

size_t strlcpy(char *dest, const char *source, size_t size)
{
   size_t src_size = 0;
   size_t        n = size;

   if (n)
      while (--n && (*dest++ = *source++)) src_size++;

   if (!n)
   {
      if (size) *dest = '\0';
      while (*source++) src_size++;
   }

   return src_size;
}

size_t strlcat(char *dest, const char *source, size_t size)
{
   size_t len = strlen(dest);

   dest += len;

   if (len > size)
      size = 0;
   else
      size -= len;

   return len + strlcpy(dest, source, size);
}
#endif

char *strldup(const char *s, size_t n)
{
   char *dst = (char*)malloc(sizeof(char) * (n + 1));
   strlcpy(dst, s, n);
   return dst;
}