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/*! \file exif-utils.h
* \brief EXIF data manipulation functions and types
*/
/*
* Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*/
#ifndef __EXIF_UTILS_H__
#define __EXIF_UTILS_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <libexif/exif-byte-order.h>
#include <libexif/exif-format.h>
#include <libexif/_stdint.h>
/* If these definitions don't work for you, please let us fix the
* macro generating _stdint.h */
/*! EXIF Unsigned Byte data type */
typedef unsigned char ExifByte; /* 1 byte */
/*! EXIF Signed Byte data type */
typedef signed char ExifSByte; /* 1 byte */
/*! EXIF Text String data type */
typedef char * ExifAscii;
/*! EXIF Unsigned Short data type */
typedef uint16_t ExifShort; /* 2 bytes */
/*! EXIF Signed Short data type */
typedef int16_t ExifSShort; /* 2 bytes */
/*! EXIF Unsigned Long data type */
typedef uint32_t ExifLong; /* 4 bytes */
/*! EXIF Signed Long data type */
typedef int32_t ExifSLong; /* 4 bytes */
/*! EXIF Unsigned Rational data type */
typedef struct {ExifLong numerator; ExifLong denominator;} ExifRational;
typedef char ExifUndefined; /* 1 byte */
/*! EXIF Signed Rational data type */
typedef struct {ExifSLong numerator; ExifSLong denominator;} ExifSRational;
/*! Retrieve an #ExifShort value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifShort exif_get_short (const unsigned char *b, ExifByteOrder order);
/*! Retrieve an #ExifSShort value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifSShort exif_get_sshort (const unsigned char *b, ExifByteOrder order);
/*! Retrieve an #ExifLong value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifLong exif_get_long (const unsigned char *b, ExifByteOrder order);
/*! Retrieve an #ExifSLong value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifSLong exif_get_slong (const unsigned char *b, ExifByteOrder order);
/*! Retrieve an #ExifRational value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifRational exif_get_rational (const unsigned char *b, ExifByteOrder order);
/*! Retrieve an #ExifSRational value from memory.
*
* \param[in] b pointer to raw EXIF value in memory
* \param[in] order byte order of raw value
* \return value
*/
ExifSRational exif_get_srational (const unsigned char *b, ExifByteOrder order);
/*! Store an ExifShort value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_short (unsigned char *b, ExifByteOrder order,
ExifShort value);
/*! Store an ExifSShort value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_sshort (unsigned char *b, ExifByteOrder order,
ExifSShort value);
/*! Store an ExifLong value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_long (unsigned char *b, ExifByteOrder order,
ExifLong value);
/*! Store an ExifSLong value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_slong (unsigned char *b, ExifByteOrder order,
ExifSLong value);
/*! Store an ExifRational value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_rational (unsigned char *b, ExifByteOrder order,
ExifRational value);
/*! Store an ExifSRational value into memory in EXIF format.
*
* \param[out] b buffer in which to write raw value
* \param[in] order byte order to use
* \param[in] value data value to store
*/
void exif_set_srational (unsigned char *b, ExifByteOrder order,
ExifSRational value);
/*! \internal */
void exif_convert_utf16_to_utf8 (char *out, const unsigned short *in, int maxlen);
/* Please do not use this function outside of the library. */
/*! \internal */
void exif_array_set_byte_order (ExifFormat, unsigned char *, unsigned int,
ExifByteOrder o_orig, ExifByteOrder o_new);
#undef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#undef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
/* For compatibility with older versions */
/*! \deprecated Use EXIF_TAG_SUB_SEC_TIME instead. */
#define EXIF_TAG_SUBSEC_TIME EXIF_TAG_SUB_SEC_TIME
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __EXIF_UTILS_H__ */
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