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CODE SNIPPET: static MagickBooleanType GetEXIFProperty(const Image *image,
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const char *property)
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{
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#define MaxDirectoryStack 16
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#define EXIF_DELIMITER "\n"
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#define EXIF_NUM_FORMATS 12
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#define EXIF_FMT_BYTE 1
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#define EXIF_FMT_STRING 2
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#define EXIF_FMT_USHORT 3
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#define EXIF_FMT_ULONG 4
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#define EXIF_FMT_URATIONAL 5
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#define EXIF_FMT_SBYTE 6
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#define EXIF_FMT_UNDEFINED 7
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#define EXIF_FMT_SSHORT 8
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#define EXIF_FMT_SLONG 9
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#define EXIF_FMT_SRATIONAL 10
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#define EXIF_FMT_SINGLE 11
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#define EXIF_FMT_DOUBLE 12
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#define TAG_EXIF_OFFSET 0x8769
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#define TAG_GPS_OFFSET 0x8825
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#define TAG_INTEROP_OFFSET 0xa005
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#define EXIFMultipleValues(size,format,arg) \
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{ \
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ssize_t \
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component; \
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\
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size_t \
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length; \
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\
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unsigned char \
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*p1; \
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\
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length=0; \
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p1=p; \
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for (component=0; component < components; component++) \
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{ \
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length+=FormatLocaleString(buffer+length,MaxTextExtent-length, \
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format", ",arg); \
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if (length >= (MaxTextExtent-1)) \
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length=MaxTextExtent-1; \
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p1+=size; \
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} \
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if (length > 1) \
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buffer[length-2]='\0'; \
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value=AcquireString(buffer); \
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}
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#define EXIFMultipleFractions(size,format,arg1,arg2) \
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{ \
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ssize_t \
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component; \
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\
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size_t \
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length; \
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\
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unsigned char \
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*p1; \
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\
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length=0; \
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p1=p; \
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for (component=0; component < components; component++) \
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{ \
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length+=FormatLocaleString(buffer+length,MaxTextExtent-length, \
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format", ",(arg1),(arg2)); \
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if (length >= (MaxTextExtent-1)) \
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length=MaxTextExtent-1; \
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p1+=size; \
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} \
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if (length > 1) \
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buffer[length-2]='\0'; \
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value=AcquireString(buffer); \
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}
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typedef struct _DirectoryInfo
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{
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const unsigned char
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*directory;
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size_t
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entry;
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ssize_t
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offset;
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} DirectoryInfo;
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typedef struct _TagInfo
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{
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size_t
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tag;
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const char
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description[36];
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} TagInfo;
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static const TagInfo
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EXIFTag[] =
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{
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{ 0x001, "exif:InteroperabilityIndex" },
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{ 0x002, "exif:InteroperabilityVersion" },
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