windows/port.cc

/* Copyright (c) 2009, Google Inc.
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 * met:
 * 
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ---
 * Author: Craig Silverstein
 */

#ifndef _WIN32
# error You should only be including windows/port.cc in a windows environment!
#endif

#include <config.h>
#include <string.h>    // for strlen(), memset(), memcmp()
#include <assert.h>
#include <stdarg.h>    // for va_list, va_start, va_end
#include <windows.h>
#include "port.h"

// These call the windows _vsnprintf, but always NUL-terminate.
#if !defined(__MINGW32__) && !defined(__MINGW64__)  /* mingw already defines */
int safe_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
  if (size == 0)        // not even room for a \0?
    return -1;          // not what C99 says to do, but what windows does
  str[size-1] = '\0';
  return _vsnprintf(str, size-1, format, ap);
}

int snprintf(char *str, size_t size, const char *format, ...) {
  int r;
  va_list ap;
  va_start(ap, format);
  r = vsnprintf(str, size, format, ap);
  va_end(ap);
  return r;
}
#endif  /* #if !defined(__MINGW32__) && !defined(__MINGW64__) */