tool_strdup.c

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/***************************************************************************
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 * Copyright (C) 1998 - 2015, 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
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 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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 * furnished to do so, under the terms of the COPYING file.
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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#include "tool_strdup.h"

#ifndef HAVE_STRDUP
char *strdup(const char *str)
{
  size_t len;
  char *newstr;

  if(!str)
    return (char *)NULL;

  len = strlen(str);

  if(len >= ((size_t)-1) / sizeof(char))
    return (char *)NULL;

  newstr = malloc((len + 1)*sizeof(char));
  if(!newstr)
    return (char *)NULL;

  memcpy(newstr, str, (len + 1)*sizeof(char));

  return newstr;

}
#endif