EXIF library (libexif) API: libexif/exif-log.h Source File

EXIF library (libexif) API 0.6.24

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
23#ifndef LIBEXIF_EXIF_LOG_H
24#define LIBEXIF_EXIF_LOG_H
25
26#ifdef __cplusplus
27extern "C" {
28#endif /* __cplusplus */
29
30#include <libexif/exif-mem.h>
31#include <stdarg.h>
32
34 typedef struct _ExifLog ExifLog;
35
41 ExifLog *exif_log_new (void);
42 ExifLog *exif_log_new_mem (ExifMem *);
43void exif_log_ref (ExifLog *log);
44void exif_log_unref (ExifLog *log);
45
52void exif_log_free (ExifLog *log);
53
54typedef enum {
55 EXIF_LOG_CODE_NONE,
56 EXIF_LOG_CODE_DEBUG,
57 EXIF_LOG_CODE_NO_MEMORY,
58 EXIF_LOG_CODE_CORRUPT_DATA
59} ExifLogCode;
60
66const char *exif_log_code_get_title (ExifLogCode code);
67
73const char *exif_log_code_get_message (ExifLogCode code);
74
77 typedef void (* ExifLogFunc) (ExifLog *log, ExifLogCode, const char *domain,
78 const char *format, va_list args, void *data);
79
87void exif_log_set_func (ExifLog *log, ExifLogFunc func, void *data);
88
89#ifndef NO_VERBOSE_TAG_STRINGS
90void exif_log (ExifLog *log, ExifLogCode, const char *domain,
91 const char *format, ...)
92#ifdef __GNUC__
93 __attribute__((__format__(printf,4,5)))
94#endif
95;
96#else
97#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
98#define exif_log(...) do { } while (0)
99#elif defined(__GNUC__)
100#define exif_log(x...) do { } while (0)
101#else
102#define exif_log (void)
103#endif
104#endif
105
106void exif_logv (ExifLog *log, ExifLogCode, const char *domain,
107 const char *format, va_list args);
108
109/* For your convenience */
110#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))
111
112#ifdef __cplusplus
113}
114#endif /* __cplusplus */
115
116#endif /* !defined(LIBEXIF_EXIF_LOG_H) */
exif_log_new
ExifLog * exif_log_new(void)
Create a new logging instance.
Definition: exif-log.c:86
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:53
exif_log_set_func
void exif_log_set_func(ExifLog *log, ExifLogFunc func, void *data)
Register log callback function.
Definition: exif-log.c:123
ExifLog
struct _ExifLog ExifLog
State maintained by the logging interface.
Definition: exif-log.h:34
exif_log_free
void exif_log_free(ExifLog *log)
Delete instance of ExifLog.
Definition: exif-log.c:112
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:77
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:62
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:57