?? geo_keyp.h
字號(hào):
/********************************************************************** * * geo_keyp.h - private interface for GeoTIFF geokey tag parsing * * Written by: Niles D. Ritter * **********************************************************************/#ifndef __geo_keyp_h_#define __geo_keyp_h_#include <stdlib.h> /* for size_t *//* * This structure contains the internal program * representation of the key entry. */struct GeoKey { int gk_key; /* GeoKey ID */ size_t gk_size; /* data byte size */ tagtype_t gk_type; /* TIFF data type */ long gk_count; /* number of values */ char* gk_data; /* pointer to data, or value */};typedef struct GeoKey GeoKey;/* * This structure represents the file-organization of * the key entry. Note that it assumes that short entries * are aligned along 2-byte boundaries. */struct KeyEntry { pinfo_t ent_key; /* GeoKey ID */ pinfo_t ent_location; /* TIFF Tag ID or 0 */ pinfo_t ent_count; /* GeoKey value count */ pinfo_t ent_val_offset; /* value or tag offset */};typedef struct KeyEntry KeyEntry;/* * This is the header of the CoordSystemInfoTag. The 'Version' * will only change if the CoorSystemInfoTag structure changes; * The Major Revision will be incremented whenever a new set of * Keys is added or changed, while the Minor revision will be * incremented when only the set of Key-values is increased. */struct KeyHeader{ pinfo_t hdr_version; /* GeoTIFF Version */ pinfo_t hdr_rev_major; /* GeoKey Major Revision # */ pinfo_t hdr_rev_minor; /* GeoKey Minor Revision # */ pinfo_t hdr_num_keys; /* Number of GeoKeys */};typedef struct KeyHeader KeyHeader;/* * This structure holds temporary data while reading or writing * the tags. */struct TempKeyData { char *tk_asciiParams; int tk_asciiParamsLength; int tk_asciiParamsOffset;};typedef struct TempKeyData TempKeyData;struct gtiff { tiff_t* gt_tif; /* TIFF file descriptor */ TIFFMethod gt_methods; /* TIFF i/o methods */ int gt_flags; /* file flags */ pinfo_t gt_version; /* GeoTIFF Version */ pinfo_t gt_rev_major;/* GeoKey Key Revision */ pinfo_t gt_rev_minor;/* GeoKey Code Revision */ int gt_num_keys; /* number of keys */ GeoKey* gt_keys; /* array of keys */ int* gt_keyindex; /* index of a key, if set*/ int gt_keymin; /* smallest key set */ int gt_keymax; /* largest key set */ pinfo_t* gt_short; /* array of SHORT vals */ double* gt_double; /* array of DOUBLE vals */ int gt_nshorts; /* number of SHORT vals */ int gt_ndoubles; /* number of DOUBLE vals */}; typedef enum { FLAG_FILE_OPEN=1, FLAG_FILE_MODIFIED=2} gtiff_flags;#define MAX_KEYINDEX 65535 /* largest possible key */#define MAX_KEYS 100 /* maximum keys in a file */#define MAX_VALUES 1000 /* maximum values in a tag */#endif /* __geo_keyp_h_ */
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