G.h

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#include <grass/config.h>
#include <grass/gis.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#ifdef HAVE_GDAL
#include <gdal.h>
#endif

#define XDR_FLOAT_NBYTES 4
#define XDR_DOUBLE_NBYTES 8
#define NULL_ROWS_INMEM 8

/* if short is 16 bits, then
 *       short will allow 32767 cols
 *       unsigned short will allow 65536 cols
 * use int if you need more columns (but this will take more memory).
 *
 */
typedef int COLUMN_MAPPING;

struct GDAL_link
{
    char *filename;
    int band_num;
    DCELL null_val;
#ifdef HAVE_GDAL
    GDALDatasetH data;
    GDALRasterBandH band;
    GDALDataType type;
#endif
};

#ifdef HAVE_GDAL
extern CPLErr G_gdal_raster_IO(
    GDALRasterBandH, GDALRWFlag,
    int, int, int, int,
    void *, int, int, GDALDataType,
    int, int);
#endif

struct fileinfo                 /* Information for opened cell files */
{
    int open_mode;              /* see defines below            */
    struct Cell_head cellhd;    /* Cell header                  */
    struct Reclass reclass;     /* Table reclass                */
    struct Cell_stats statf;    /* Cell stats                   */
    struct Range range;         /* Range structure              */
    struct FPRange fp_range;    /* float Range structure        */
    int want_histogram;
    int reclass_flag;           /* Automatic reclass flag       */
    off_t *row_ptr;             /* File row addresses           */
    COLUMN_MAPPING *col_map;    /* Data to window col mapping   */
    double C1, C2;              /* Data to window row constants */
    int cur_row;                /* Current data row in memory   */
    int null_cur_row;           /* Current null row in memory   */
    int cur_nbytes;             /* nbytes per cell for current row */
    unsigned char *data;        /* Decompressed data buffer     */
    int nbytes;                 /* bytes per cell               */
    RASTER_MAP_TYPE map_type;   /* type: int, float or double map */
    char *temp_name;            /* Temporary name for NEW files */
    char *null_temp_name;       /* Temporary name for NEW NULL files */
    int null_file_exists;       /* for existing raster maps     */
    char *name;                 /* Name of open file            */
    char *mapset;               /* Mapset of open file          */
    int io_error;               /* io error warning given       */
    XDR xdrstream;              /* xdr stream for reading fp    */
    unsigned char *NULL_ROWS[NULL_ROWS_INMEM];
    unsigned char *null_work_buf;       /* data buffer for reading null rows    */
    int min_null_row;           /* Minimum row null row number in memory */
    struct Quant quant;
    struct GDAL_link *gdal;
};

struct G__                      /*  Structure of library globals */
{
    int fp_nbytes;              /* size of cell in floating maps */
    RASTER_MAP_TYPE fp_type;    /* type for writing floating maps */
    struct Cell_head window;    /* Contains the current window          */
    int window_set;             /* Flag: window set?                    */
    int mask_fd;                /* File descriptor for automatic mask   */
    int auto_mask;              /* Flag denoting automatic masking      */
    CELL *mask_buf;
    char *null_buf;             /* buffer for reading null rows         */
    CELL *temp_buf;
    unsigned char *compressed_buf;      /* Pre/post compressed data buffer      */
    int compressed_buf_size;    /* sizeof compressed_buf                */
    unsigned char *work_buf;    /* work data buffer                     */
    int work_buf_size;          /* sizeof work_buf                      */
    int null_buf_size;          /* sizeof null_buf                      */
    int mask_buf_size;          /* sizeof mask_buf                      */
    int temp_buf_size;          /* sizeof temp_buf                      */
    int want_histogram;

    int fileinfo_count;
    struct fileinfo *fileinfo;
};

extern struct G__ G__;          /* allocated in gisinit */

#define OPEN_OLD              1
#define OPEN_NEW_COMPRESSED   2
#define OPEN_NEW_UNCOMPRESSED 3
#define OPEN_NEW_RANDOM       4