tesseract 4.1.1
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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 <cstdio>
20#include <cstdlib>
21#include <cstdarg>
22#include <cstring>
23#include "errcode.h"
24
25constexpr ERRCODE BADERRACTION("Illegal error action");
26#define MAX_MSG 1024
27
28/**********************************************************************
29 * error
30 *
31 * Print an error message and continue, exit or abort according to action.
32 * Makes use of error messages and numbers in a common place.
33 *
34 **********************************************************************/
35void ERRCODE::error( // handle error
36const char *caller, // name of caller
37TessErrorLogCode action, // action to take
38const char *format, ... // special message
39) const {
40 va_list args; // variable args
41 char msg[MAX_MSG];
42 char *msgptr = msg;
43
44 if (caller != nullptr)
45 //name of caller
46 msgptr += sprintf (msgptr, "%s:", caller);
47 //actual message
48 msgptr += sprintf (msgptr, "Error:%s", message);
49 if (format != nullptr) {
50 msgptr += sprintf (msgptr, ":");
51 va_start(args, format); //variable list
52 #ifdef _WIN32
53 //print remainder
54 msgptr += _vsnprintf (msgptr, MAX_MSG - 2 - (msgptr - msg), format, args);
55 msg[MAX_MSG - 2] = '\0'; //ensure termination
56 strcat (msg, "\n");
57 #else
58 //print remainder
59 msgptr += vsprintf (msgptr, format, args);
60 //no specific
61 msgptr += sprintf (msgptr, "\n");
62 #endif
63 va_end(args);
64 }
65 else
66 //no specific
67 msgptr += sprintf (msgptr, "\n");
68
69 // %s is needed here so msg is printed correctly!
70 fprintf(stderr, "%s", msg);
71
72 switch (action) {
73 case DBG:
74 case TESSLOG:
75 return; //report only
76 case TESSEXIT:
77 case ABORT:
78#if !defined(NDEBUG)
79 // Create a deliberate abnormal exit as the stack trace is more useful
80 // that way. This is done only in debug builds, because the
81 // error message "segmentation fault" confuses most normal users.
82#if defined(__GNUC__)
83 __builtin_trap();
84#else
85 *reinterpret_cast<int*>(0) = 0;
86#endif
87#endif
88 abort();
89 default:
90 BADERRACTION.error ("error", ABORT, nullptr);
91 }
92}
constexpr ERRCODE BADERRACTION("Illegal error action")
#define MAX_MSG
Definition: errcode.cpp:26
TessErrorLogCode
Definition: errcode.h:25
@ TESSLOG
Definition: errcode.h:27
@ DBG
Definition: errcode.h:26
@ TESSEXIT
Definition: errcode.h:28
@ ABORT
Definition: errcode.h:29
void error(const char *caller, TessErrorLogCode action, const char *format,...) const
Definition: errcode.cpp:35