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comparison mupdf-source/thirdparty/tesseract/src/ccutil/tprintf.cpp @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /**********************************************************************
2 * File: tprintf.cpp
3 * Description: Trace version of printf - portable between UX and NT
4 * Author: Phil Cheatle
5 *
6 * (C) Copyright 1995, Hewlett-Packard Ltd.
7 ** Licensed under the Apache License, Version 2.0 (the "License");
8 ** you may not use this file except in compliance with the License.
9 ** You may obtain a copy of the License at
10 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 *
17 **********************************************************************/
18
19 // Include automatically generated configuration file if running autoconf.
20 #ifdef HAVE_CONFIG_H
21 # include "config_auto.h"
22 #endif
23
24 #include "tesserrstream.h"
25 #include "tprintf.h"
26
27 #include "params.h"
28
29 #include <climits> // for INT_MAX
30 #include <cstdarg>
31 #include <cstdio>
32
33 namespace tesseract {
34
35 INT_VAR(log_level, INT_MAX, "Logging level");
36
37 static STRING_VAR(debug_file, "", "File to send tprintf output to");
38
39 // File for debug output.
40 FILE *debugfp;
41
42 // Set output for log messages.
43 // The output is written to stderr if debug_file is empty.
44 // Otherwise it is written to debug_file.
45 // It is possible to switch between stderr and debug_file output:
46 // tprintf("write to configured output\n");
47 // debug_file = "";
48 // tprintf("write to stderr\n");
49 // debug_file = "/tmp/log";
50 // tprintf("write to /tmp/log\n");
51 // debug_file = "";
52 // tprintf("write to stderr\n");
53 FILE *get_debugfp() {
54 if (debug_file.empty()) {
55 // Write to stderr.
56 if (debugfp != stderr && debugfp != nullptr) {
57 fclose(debugfp);
58 }
59 debugfp = stderr;
60 } else if (debugfp == stderr || debugfp == nullptr) {
61 // Write to file.
62 #ifdef _WIN32
63 if (debug_file == "/dev/null") {
64 // Replace /dev/null by nul for Windows.
65 debug_file = "nul";
66 }
67 #endif
68 debugfp = fopen(debug_file.c_str(), "wb");
69 }
70 return debugfp;
71 }
72
73 // Trace printf.
74 void tprintf(const char *format, ...) {
75 FILE *f = get_debugfp();
76 va_list args; // variable args
77 va_start(args, format); // variable list
78 vfprintf(f, format, args);
79 va_end(args);
80 }
81
82 TessErrStream tesserr;
83
84 } // namespace tesseract