exif-log.h

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00001 
00004 /*
00005  * Copyright (c) 2004 Lutz Mueller <lutz@users.sourceforge.net>
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2 of the License, or (at your option) any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful, 
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details. 
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the
00019  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00020  * Boston, MA  02110-1301  USA.
00021  */
00022 
00023 #ifndef __EXIF_LOG_H__
00024 #define __EXIF_LOG_H__
00025 
00026 #ifdef __cplusplus
00027 extern "C" {
00028 #endif /* __cplusplus */
00029 
00030 #include <libexif/exif-mem.h>
00031 #include <stdarg.h>
00032 
00034 typedef struct _ExifLog        ExifLog;
00035 
00041 ExifLog *exif_log_new     (void);
00042 ExifLog *exif_log_new_mem (ExifMem *);
00043 void     exif_log_ref     (ExifLog *log);
00044 void     exif_log_unref   (ExifLog *log);
00045 
00052 void     exif_log_free    (ExifLog *log);
00053 
00054 typedef enum {
00055         EXIF_LOG_CODE_NONE,
00056         EXIF_LOG_CODE_DEBUG,
00057         EXIF_LOG_CODE_NO_MEMORY,
00058         EXIF_LOG_CODE_CORRUPT_DATA
00059 } ExifLogCode;
00060 
00066 const char *exif_log_code_get_title   (ExifLogCode code);
00067 
00073 const char *exif_log_code_get_message (ExifLogCode code);
00074 
00077 typedef void (* ExifLogFunc) (ExifLog *log, ExifLogCode, const char *domain,
00078                               const char *format, va_list args, void *data);
00079 
00087 void     exif_log_set_func (ExifLog *log, ExifLogFunc func, void *data);
00088 
00089 #ifndef NO_VERBOSE_TAG_STRINGS
00090 void     exif_log  (ExifLog *log, ExifLogCode, const char *domain,
00091                     const char *format, ...)
00092 #ifdef __GNUC__
00093                         __attribute__((__format__(printf,4,5)))
00094 #endif
00095 ;
00096 #else
00097 #if defined(__STDC_VERSION__) &&  __STDC_VERSION__ >= 199901L
00098 #define exif_log(...) do { } while (0)
00099 #elif defined(__GNUC__)
00100 #define exif_log(x...) do { } while (0)
00101 #else
00102 #define exif_log (void)
00103 #endif
00104 #endif
00105 
00106 void     exif_logv (ExifLog *log, ExifLogCode, const char *domain,
00107                     const char *format, va_list args);
00108 
00109 /* For your convenience */
00110 #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))
00111 
00112 #ifdef __cplusplus
00113 }
00114 #endif /* __cplusplus */
00115 
00116 #endif /* __EXIF_LOG_H__ */

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