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

EXIF library (libexif) API 0.6.23

exif-entry.h
Go to the documentation of this file.
1
4 /*
5 * Copyright (c) 2001 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 __EXIF_ENTRY_H__
24 #define __EXIF_ENTRY_H__
25
26 #ifdef __cplusplus
27 extern "C" {
28 #endif /* __cplusplus */
29
35 typedef struct _ExifEntry ExifEntry;
36 typedef struct _ExifEntryPrivate ExifEntryPrivate;
37
38 #include <libexif/exif-content.h>
39 #include <libexif/exif-format.h>
40 #include <libexif/exif-mem.h>
41
43 struct _ExifEntry {
45 ExifTag tag;
46
48 ExifFormat format;
49
52 unsigned long components;
53
57 unsigned char *data;
58
61 unsigned int size;
62
65 ExifContent *parent;
66
68 ExifEntryPrivate *priv;
69 };
70
71 /* Lifecycle */
72
80 ExifEntry *exif_entry_new (void);
81
90 ExifEntry *exif_entry_new_mem (ExifMem *);
91
98 void exif_entry_ref (ExifEntry *entry);
99
105 void exif_entry_unref (ExifEntry *entry);
106
114 void exif_entry_free (ExifEntry *entry);
115
125 void exif_entry_initialize (ExifEntry *e, ExifTag tag);
126
140 void exif_entry_fix (ExifEntry *entry);
141
142
143 /* For your convenience */
144
164 const char *exif_entry_get_value (ExifEntry *entry, char *val,
165 unsigned int maxlen);
166
173 void exif_entry_dump (ExifEntry *entry, unsigned int indent);
174
180 #define exif_entry_get_ifd(e) ((e)?exif_content_get_ifd((e)->parent):EXIF_IFD_COUNT)
181
182 #ifdef __cplusplus
183 }
184 #endif /* __cplusplus */
185
186 #endif /* __EXIF_ENTRY_H__ */
exif-content.h
Handling EXIF IFDs.
exif_entry_get_value
const char * exif_entry_get_value(ExifEntry *entry, char *val, unsigned int maxlen)
Return a localized textual representation of the value of the EXIF entry.
Definition: exif-entry.c:846
exif_entry_fix
void exif_entry_fix(ExifEntry *entry)
Fix the type or format of the given EXIF entry to bring it into spec.
Definition: exif-entry.c:205
exif_entry_free
void exif_entry_free(ExifEntry *entry)
Actually free the ExifEntry.
Definition: exif-entry.c:157
exif_entry_new_mem
ExifEntry * exif_entry_new_mem(ExifMem *)
Reserve memory for and initialize new ExifEntry using the specified memory allocator.
Definition: exif-entry.c:122
exif_entry_dump
void exif_entry_dump(ExifEntry *entry, unsigned int indent)
Dump text representation of ExifEntry to stdout.
Definition: exif-entry.c:598
exif_entry_new
ExifEntry * exif_entry_new(void)
Reserve memory for and initialize a new ExifEntry.
Definition: exif-entry.c:111
exif_entry_ref
void exif_entry_ref(ExifEntry *entry)
Increase reference counter for ExifEntry.
Definition: exif-entry.c:139
exif_entry_initialize
void exif_entry_initialize(ExifEntry *e, ExifTag tag)
Initialize an empty ExifEntry with default data in the correct format for the given tag.
Definition: exif-entry.c:1459
exif_entry_unref
void exif_entry_unref(ExifEntry *entry)
Decrease reference counter for ExifEntry.
Definition: exif-entry.c:147
exif-format.h
Handling native EXIF data types.
ExifFormat
ExifFormat
EXIF tag data formats.
Definition: exif-format.h:32
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
ExifTag
ExifTag
EXIF tags.
Definition: exif-tag.h:34
_ExifContent
Definition: exif-content.h:41
_ExifEntry
Data found in one EXIF tag.
Definition: exif-entry.h:43
_ExifEntry::components
unsigned long components
Number of elements in the array, if this is an array entry.
Definition: exif-entry.h:52
_ExifEntry::format
ExifFormat format
Type of data in this entry.
Definition: exif-entry.h:48
_ExifEntry::parent
ExifContent * parent
ExifContent containing this entry.
Definition: exif-entry.h:65
_ExifEntry::data
unsigned char * data
Pointer to the raw EXIF data for this entry.
Definition: exif-entry.h:57
_ExifEntry::tag
ExifTag tag
EXIF tag for this entry.
Definition: exif-entry.h:45
_ExifEntry::priv
ExifEntryPrivate * priv
Internal data to be used by libexif itself.
Definition: exif-entry.h:68
_ExifEntry::size
unsigned int size
Number of bytes in the buffer at data.
Definition: exif-entry.h:61