tesseract 5.2.0
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errcode.cpp
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1/**********************************************************************
2 * File: errcode.cpp (Formerly error.c)
3 * Description: Generic error handler function
4 * Author: Ray Smith
5 *
6 * (C) Copyright 1989, 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 "errcode.h"
20
21#include <cstdarg>
22#include <cstdio>
23#include <cstdlib>
24#include <cstring>
25
26namespace tesseract {
27
28constexpr ERRCODE BADERRACTION("Illegal error action");
29#define MAX_MSG 1024
30
31/**********************************************************************
32 * error
33 *
34 * Print an error message and continue, exit or abort according to action.
35 * Makes use of error messages and numbers in a common place.
36 *
37 **********************************************************************/
38void ERRCODE::error( // handle error
39 const char *caller, // name of caller
40 TessErrorLogCode action, // action to take
41 const char *format, ... // special message
42 ) const {
43 va_list args; // variable args
44 char msg[MAX_MSG];
45 char *msgptr = msg;
46
47 if (caller != nullptr) {
48 // name of caller
49 msgptr += sprintf(msgptr, "%s:", caller);
50 }
51 // actual message
52 msgptr += sprintf(msgptr, "Error:%s", message);
53 if (format != nullptr) {
54 msgptr += sprintf(msgptr, ":");
55 va_start(args, format); // variable list
56#ifdef _WIN32
57 // print remainder
58 msgptr += _vsnprintf(msgptr, MAX_MSG - 2 - (msgptr - msg), format, args);
59 msg[MAX_MSG - 2] = '\0'; // ensure termination
60 strcat(msg, "\n");
61#else
62 // print remainder
63 msgptr += vsprintf(msgptr, format, args);
64 // no specific
65 msgptr += sprintf(msgptr, "\n");
66#endif
67 va_end(args);
68 } else {
69 // no specific
70 msgptr += sprintf(msgptr, "\n");
71 }
72
73 // %s is needed here so msg is printed correctly!
74 fprintf(stderr, "%s", msg);
75
76 switch (action) {
77 case DBG:
78 case TESSLOG:
79 return; // report only
80 case TESSEXIT:
81 case ABORT:
82#if !defined(NDEBUG)
83 // Create a deliberate abnormal exit as the stack trace is more useful
84 // that way. This is done only in debug builds, because the
85 // error message "segmentation fault" confuses most normal users.
86# if defined(__GNUC__)
87 __builtin_trap();
88# else
89 *reinterpret_cast<int *>(0) = 0;
90# endif
91#endif
92 abort();
93 default:
94 BADERRACTION.error("error", ABORT);
95 }
96}
97
98void ERRCODE::error(const char *caller, TessErrorLogCode action) const {
99 error(caller, action, nullptr);
100}
101
102} // namespace tesseract
#define MAX_MSG
Definition: errcode.cpp:29
constexpr ERRCODE BADERRACTION("Illegal error action")
TessErrorLogCode
Definition: errcode.h:27
@ ABORT
Definition: errcode.h:31
@ TESSLOG
Definition: errcode.h:29
@ TESSEXIT
Definition: errcode.h:30
void error(const char *caller, TessErrorLogCode action, const char *format,...) const __attribute__((format(printf
Definition: errcode.cpp:38