129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
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/**********************************************************************
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*
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* geo_keyp.h - private interface for GeoTIFF geokey tag parsing
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*
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* Written by: Niles D. Ritter
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*
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* copyright (c) 1995 Niles D. Ritter
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*
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* Permission granted to use this software, so long as this copyright
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* notice accompanies any products derived therefrom.
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**********************************************************************/
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#ifndef LIBGEOTIFF_GEO_KEYP_H_
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#define LIBGEOTIFF_GEO_KEYP_H_
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#include <stdlib.h> /* for size_t */
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#include "proj.h"
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/*
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* This structure contains the internal program
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* representation of the key entry.
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*/
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struct GeoKey {
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int gk_key; /* GeoKey ID */
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size_t gk_size; /* data byte size */
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tagtype_t gk_type; /* TIFF data type */
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long gk_count; /* number of values */
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char* gk_data; /* pointer to data, or value */
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};
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typedef struct GeoKey GeoKey;
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/*
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* This structure represents the file-organization of
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* the key entry. Note that it assumes that short entries
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* are aligned along 2-byte boundaries.
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*/
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struct KeyEntry {
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pinfo_t ent_key; /* GeoKey ID */
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pinfo_t ent_location; /* TIFF Tag ID or 0 */
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pinfo_t ent_count; /* GeoKey value count */
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pinfo_t ent_val_offset; /* value or tag offset */
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};
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typedef struct KeyEntry KeyEntry;
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/*
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* This is the header of the CoordSystemInfoTag. The 'Version'
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* will only change if the CoorSystemInfoTag structure changes;
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* The Major Revision will be incremented whenever a new set of
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* Keys is added or changed, while the Minor revision will be
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* incremented when only the set of Key-values is increased.
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*/
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struct KeyHeader{
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pinfo_t hdr_version; /* GeoTIFF Version */
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pinfo_t hdr_rev_major; /* GeoKey Major Revision # */
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pinfo_t hdr_rev_minor; /* GeoKey Minor Revision # */
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pinfo_t hdr_num_keys; /* Number of GeoKeys */
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};
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typedef struct KeyHeader KeyHeader;
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/*
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* This structure holds temporary data while reading or writing
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* the tags.
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*/
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struct TempKeyData {
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char *tk_asciiParams;
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int tk_asciiParamsLength;
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int tk_asciiParamsOffset;
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};
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typedef struct TempKeyData TempKeyData;
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struct gtiff;
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#ifndef GTIF_PRINT_FUNC_FORMAT
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#if defined(__GNUC__) && __GNUC__ >= 3
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#define GTIF_PRINT_FUNC_FORMAT( format_idx, arg_idx ) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
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#else
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#define GTIF_PRINT_FUNC_FORMAT( format_idx, arg_idx )
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#endif
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#endif
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#ifndef GTERRORCALLBACK_DEFINED
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#define GTERRORCALLBACK_DEFINED
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/* Defined in both geotiff.h and geo_kep.h */
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typedef void (*GTErrorCallback) (struct gtiff*,
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int level,
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const char* msg, ...) GTIF_PRINT_FUNC_FORMAT(3,4);
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#endif
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struct gtiff {
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tiff_t* gt_tif; /* TIFF file descriptor */
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struct _TIFFMethod gt_methods; /* TIFF i/o methods */
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int gt_flags; /* file flags */
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pinfo_t gt_version; /* GeoTIFF Version */
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pinfo_t gt_rev_major;/* GeoKey Key Revision */
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pinfo_t gt_rev_minor;/* GeoKey Code Revision */
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int gt_num_keys; /* number of keys */
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GeoKey* gt_keys; /* array of keys */
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int* gt_keyindex; /* index of a key, if set*/
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int gt_keymin; /* smallest key set */
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int gt_keymax; /* largest key set */
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pinfo_t* gt_short; /* array of SHORT vals */
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double* gt_double; /* array of DOUBLE vals */
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int gt_nshorts; /* number of SHORT vals */
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int gt_ndoubles; /* number of DOUBLE vals */
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GTErrorCallback gt_error_callback;
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void* gt_user_data;
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PJ_CONTEXT *pj_context; /* PROJ context */
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int own_pj_context; /* whether we own the PROJ context */
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char szTmpBufferForGTIFValueNameEx[160];
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};
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typedef enum {
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FLAG_FILE_OPEN=1,
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FLAG_FILE_MODIFIED=2
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} gtiff_flags;
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#define MAX_KEYINDEX 65535 /* largest possible key */
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#define MAX_KEYS 100 /* maximum keys in a file */
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#define MAX_VALUES 1000 /* maximum values in a tag */
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#endif /* LIBGEOTIFF_GEO_KEYP_H_ */
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