/**********************************************************************

 * File:        tprintf.cpp

 * Description: Trace version of printf - portable between UX and NT

 * Author:      Phil Cheatle

 *

 * (C) Copyright 1995, Hewlett-Packard Ltd.

 ** 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.

 *

 **********************************************************************/

// Include automatically generated configuration file if running autoconf.

#ifdef HAVE_CONFIG_H

#  include "config_auto.h"

#endif

#include "tesserrstream.h"

#include "tprintf.h"

#include "params.h"

#include <climits> // for INT_MAX

#include <cstdarg>

#include <cstdio>

namespace tesseract {

INT_VAR(log_level, INT_MAX, "Logging level");

static STRING_VAR(debug_file, "", "File to send tprintf output to");

// File for debug output.

FILE *debugfp;

// Set output for log messages.

// The output is written to stderr if debug_file is empty.

// Otherwise it is written to debug_file.

// It is possible to switch between stderr and debug_file output:

// tprintf("write to configured output\n");

// debug_file = "";

// tprintf("write to stderr\n");

// debug_file = "/tmp/log";

// tprintf("write to /tmp/log\n");

// debug_file = "";

// tprintf("write to stderr\n");

FILE *get_debugfp() {

  if (debug_file.empty()) {

    // Write to stderr.

    if (debugfp != stderr && debugfp != nullptr) {

      fclose(debugfp);

    }

    debugfp = stderr;

  } else if (debugfp == stderr || debugfp == nullptr) {

    // Write to file.

#ifdef _WIN32

    if (debug_file == "/dev/null") {

      // Replace /dev/null by nul for Windows.

      debug_file = "nul";

    }

#endif

    debugfp = fopen(debug_file.c_str(), "wb");

  }

  return debugfp;

}

TessErrStream tesserr;

} // namespace tesseract