/usr/include/gmt/gmt_grdio.h is in libgmt-dev 4.5.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /*--------------------------------------------------------------------
* $Id: gmt_grdio.h,v 1.53 2011/03/03 21:02:50 guru Exp $
*
* Copyright (c) 1991-2011 by P. Wessel and W. H. F. Smith
* See LICENSE.TXT file for copying and redistribution conditions.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 or any later version.
*
* This program 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 General Public License for more details.
*
* Contact info: gmt.soest.hawaii.edu
*--------------------------------------------------------------------*/
/*
* Include file for grd i/o
*
* Author: Paul Wessel
* Date: 21-AUG-1995
* Revised: 06-DEC-2001
* Version: 4
*/
#ifndef GMT_GRDIO_H
#define GMT_GRDIO_H
/* Constants for *.img grids */
#define GMT_IMG_MINLON 0.0
#define GMT_IMG_MAXLON 360.0
#define GMT_IMG_MINLAT_72 -72.0059773539
#define GMT_IMG_MAXLAT_72 +72.0059773539
#define GMT_IMG_MINLAT_80 -80.7380086280
#define GMT_IMG_MAXLAT_80 +80.7380086280
#define GMT_IMG_NLON_1M 21600 /* At 1 min resolution */
#define GMT_IMG_NLON_2M 10800 /* At 2 min resolution */
#define GMT_IMG_NLAT_1M_72 12672 /* At 1 min resolution */
#define GMT_IMG_NLAT_1M_80 17280 /* At 1 min resolution */
#define GMT_IMG_NLAT_2M_72 6336 /* At 1 min resolution */
#define GMT_IMG_NLAT_2M_80 8640 /* At 1 min resolution */
#define GMT_IMG_ITEMSIZE 2 /* Size of 2 byte short ints */
EXTERN_MSC GMT_LONG GMT_grdformats [GMT_N_GRD_FORMATS][2];
EXTERN_MSC GMT_LONG GMT_read_grd_info (char *file, struct GRD_HEADER *header);
EXTERN_MSC GMT_LONG GMT_update_grd_info (char *file, struct GRD_HEADER *header);
EXTERN_MSC GMT_LONG GMT_write_grd_info (char *file, struct GRD_HEADER *header);
EXTERN_MSC GMT_LONG GMT_read_grd (char *file, struct GRD_HEADER *header, float *grid, double w, double e, double s, double n, GMT_LONG *pad, GMT_LONG complex);
EXTERN_MSC GMT_LONG GMT_write_grd (char *file, struct GRD_HEADER *header, float *grid, double w, double e, double s, double n, GMT_LONG *pad, GMT_LONG complex);
EXTERN_MSC GMT_LONG GMT_grd_data_size (GMT_LONG format, double *nan_value);
EXTERN_MSC GMT_LONG GMT_grd_prep_io (struct GRD_HEADER *header, double *w, double *e, double *s, double *n, GMT_LONG *width, GMT_LONG *height, GMT_LONG *first_col, GMT_LONG *last_col, GMT_LONG *first_row, GMT_LONG *last_row, GMT_LONG **index);
EXTERN_MSC GMT_LONG GMT_adjust_loose_wesn (double *w, double *e, double *s, double *n, struct GRD_HEADER *header);
EXTERN_MSC GMT_LONG GMT_grd_setregion (struct GRD_HEADER *h, double *xmin, double *xmax, double *ymin, double *ymax, GMT_LONG interpolant);
EXTERN_MSC GMT_LONG GMT_grd_format_decoder (const char *code);
EXTERN_MSC void GMT_grd_init (struct GRD_HEADER *header, int argc, char **argv, GMT_LONG update);
EXTERN_MSC void GMT_grd_shift (struct GRD_HEADER *header, float *grd, double shift);
EXTERN_MSC void GMT_decode_grd_h_info (char *input, struct GRD_HEADER *h);
EXTERN_MSC GMT_LONG GMT_grd_RI_verify (struct GRD_HEADER *h, GMT_LONG mode);
EXTERN_MSC GMT_LONG GMT_grd_get_format (char *file, struct GRD_HEADER *header, GMT_LONG magic);
EXTERN_MSC GMT_LONG GMT_grd_is_global (struct GRD_HEADER *h);
/* These are pointers to the various functions and are set in GMT_grdio_init() */
EXTERN_MSC PFL GMT_io_readinfo[GMT_N_GRD_FORMATS];
EXTERN_MSC PFL GMT_io_updateinfo[GMT_N_GRD_FORMATS];
EXTERN_MSC PFL GMT_io_writeinfo[GMT_N_GRD_FORMATS];
EXTERN_MSC PFL GMT_io_readgrd[GMT_N_GRD_FORMATS];
EXTERN_MSC PFL GMT_io_writegrd[GMT_N_GRD_FORMATS];
#include "gmt_customio.h"
struct GMT_GRD_INFO { /* Holds any -R -I -F settings passed indirectly via -R<grdfile> */
struct GRD_HEADER grd; /* Header of grid file passed via -R */
GMT_LONG active; /* TRUE if initialized via -R */
};
struct GMT_GRID { /* To hold a GMT float grid and its header in one container */
struct GRD_HEADER *header; /* Pointer to full GMT header for the grid */
float *data; /* Pointer to the float grid */
};
struct GMT_GRDFILE {
GMT_LONG size; /* Bytes per item */
GMT_LONG n_byte; /* Number of bytes for row */
GMT_LONG row; /* Current row */
int fid; /* NetCDF file number */
size_t edge[2]; /* Dimension arrays for netCDF files */
size_t start[2]; /* same */
GMT_LONG check; /* TRUE if we must replace NaNs with another representation on i/o */
GMT_LONG auto_advance; /* TRUE if we want to read file sequentially */
double scale; /* scale to use for i/o */
double offset; /* offset to use for i/o */
FILE *fp; /* File pointer for native files */
void *v_row; /* Void Row pointer for any format */
struct GRD_HEADER header; /* Full GMT header for the file */
};
/* Row i/o functions */
EXTERN_MSC GMT_LONG GMT_open_grd (char *file, struct GMT_GRDFILE *G, char mode);
EXTERN_MSC void GMT_close_grd (struct GMT_GRDFILE *G);
EXTERN_MSC GMT_LONG GMT_read_grd_row (struct GMT_GRDFILE *G, GMT_LONG row_no, float *row);
EXTERN_MSC GMT_LONG GMT_write_grd_row (struct GMT_GRDFILE *G, GMT_LONG row_no, float *row);
/* IMG read function */
EXTERN_MSC GMT_LONG GMT_read_img (char *imgfile, struct GRD_HEADER *h, float **grid, double w, double e, double s, double n, double scale, GMT_LONG mode, double lat, GMT_LONG init);
/* Grid container allocation/deallocation routines */
EXTERN_MSC struct GMT_GRID *GMT_create_grid (char *arg);
EXTERN_MSC void GMT_destroy_grid (struct GMT_GRID *G, GMT_LONG free_grid);
#endif /* GMT_GRDIO_H */
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