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libexif
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exif-utils.h
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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 LIBEXIF_EXIF_UTILS_H #define LIBEXIF_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 char *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 /* !defined(LIBEXIF_EXIF_UTILS_H) */