EXIF library (libexif) API 0.6.25

exif-log.h
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1
4/*
5 * Copyright (c) 2004 Lutz Mueller <lutz@users.sourceforge.net>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301 USA.
21 *
22 * SPDX-License-Identifier: LGPL-2.0-or-later
23 */
24
25#ifndef LIBEXIF_EXIF_LOG_H
26#define LIBEXIF_EXIF_LOG_H
27
28#ifdef __cplusplus
29 extern "C" {
30#endif /* __cplusplus */
31
32#include <libexif/exif-mem.h>
33#include <stdarg.h>
34
36 typedef struct _ExifLog ExifLog;
37
43 ExifLog *exif_log_new (void);
44 ExifLog *exif_log_new_mem (ExifMem *);
45 void exif_log_ref (ExifLog *log);
46 void exif_log_unref (ExifLog *log);
47
54 void exif_log_free (ExifLog *log);
55
56 typedef enum {
57 EXIF_LOG_CODE_NONE,
58 EXIF_LOG_CODE_DEBUG,
59 EXIF_LOG_CODE_NO_MEMORY,
60 EXIF_LOG_CODE_CORRUPT_DATA
61} ExifLogCode;
62
68 const char *exif_log_code_get_title (ExifLogCode code);
69
75 const char *exif_log_code_get_message (ExifLogCode code);
76
79 typedef void (* ExifLogFunc) (ExifLog *log, ExifLogCode, const char *domain,
80 const char *format, va_list args, void *data);
81
89 void exif_log_set_func (ExifLog *log, ExifLogFunc func, void *data);
90
91#ifndef NO_VERBOSE_TAG_STRINGS
92 void exif_log (ExifLog *log, ExifLogCode, const char *domain,
93 const char *format, ...)
94#ifdef __GNUC__
95 __attribute__((__format__(printf,4,5)))
96#endif
97;
98#else
99#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
100#define exif_log(...) do { } while (0)
101#elif defined(__GNUC__)
102#define exif_log(x...) do { } while (0)
103#else
104#define exif_log (void)
105#endif
106#endif
107
108 void exif_logv (ExifLog *log, ExifLogCode, const char *domain,
109 const char *format, va_list args);
110
111/* For your convenience */
112#define EXIF_LOG_NO_MEMORY(l,d,s) exif_log ((l), EXIF_LOG_CODE_NO_MEMORY, (d), "Could not allocate %lu byte(s).", (unsigned long)(s))
113
114#ifdef __cplusplus
115}
116#endif /* __cplusplus */
117
118#endif /* !defined(LIBEXIF_EXIF_LOG_H) */
exif_log_new
ExifLog * exif_log_new(void)
Create a new logging instance.
Definition exif-log.c:88
exif_log_code_get_title
const char * exif_log_code_get_title(ExifLogCode code)
Return a textual description of the given class of error log.
Definition exif-log.c:55
exif_log_set_func
void exif_log_set_func(ExifLog *log, ExifLogFunc func, void *data)
Register log callback function.
Definition exif-log.c:125
ExifLog
struct _ExifLog ExifLog
State maintained by the logging interface.
Definition exif-log.h:36
exif_log_free
void exif_log_free(ExifLog *log)
Delete instance of ExifLog.
Definition exif-log.c:114
ExifLogFunc
void(* ExifLogFunc)(ExifLog *log, ExifLogCode, const char *domain, const char *format, va_list args, void *data)
Log callback function prototype.
Definition exif-log.h:79
exif_log_code_get_message
const char * exif_log_code_get_message(ExifLogCode code)
Return a verbose description of the given class of error log.
Definition exif-log.c:64
exif-mem.h
Define the ExifMem data type and the associated functions.
ExifMem
struct _ExifMem ExifMem
ExifMem define a memory allocator.
Definition exif-mem.h:59