src/core/support/file_win32.c

/*
 *
 * Copyright 2014, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * 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,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <grpc/support/port_platform.h>

#ifdef GPR_WIN32

#include "src/core/support/file.h"

#include <io.h>
#include <stdio.h>
#include <string.h>

#include <grpc/support/alloc.h>
#include <grpc/support/log.h>

FILE *gpr_tmpfile(const char *prefix, char **tmp_filename) {
  FILE *result = NULL;
  char *template;

  if (tmp_filename != NULL) *tmp_filename = NULL;

  gpr_asprintf(&template, "%s_XXXXXX", prefix);
  GPR_ASSERT(template != NULL);

  /* _mktemp_s can only create a maximum of 26 file names for any combination of
     base and template values which is kind of sad... We may revisit this
     function later to have something better... */
  if (_mktemp_s(template, strlen(template) + 1) != 0) {
    gpr_log(LOG_ERROR, "Could not create tmp file.");
    goto end;
  }
  if (fopen_s(&result, template, "wb+") != 0) {
    gpr_log(GPR_ERROR, "Could not open file %s", template);
    result = NULL;
    goto end;
  }

end:
  if (result != NULL && tmp_filename != NULL) {
    *tmp_filename = template;
  } else {
    gpr_free(template);
  }
  return result;
}

#endif /* GPR_WIN32 */