src/emscripten-optimizer/snprintf.h

/*
 * Copyright 2015 WebAssembly Community Group participants
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef wasm_snprintf_h
#define wasm_snprintf_h

#include <stdarg.h>

// Visual Studio does not support C99, so emulate snprintf support for it
// manually.

#ifdef _MSC_VER

#define snprintf c99_snprintf

inline int
c99_vsnprintf(char* str, size_t size, const char* format, va_list ap) {
  int count = -1;

  if (size != 0)
    count = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
  if (count == -1)
    count = _vscprintf(format, ap);

  return count;
}

inline int c99_snprintf(char* str, size_t size, const char* format, ...) {
  int count;
  va_list ap;

  va_start(ap, format);
  count = c99_vsnprintf(str, size, format, ap);
  va_end(ap);

  return count;
}
#endif

#endif // wasm_snprintf_h