dem.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1997 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the Computer Systems
 *  Engineering Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/* Ported from CMU/Monarch's code, nov'98 -Padma.*/

#ifndef __dem_h__
#define __dem_h__

#ifndef __PRETTY_FUNCTION__
#define __PRETTY_FUNCTION__ ("")
#endif /* !__PRETTY_FUNCTION__ */

struct ARecord {
    char    q_name[145];
    int dl_code;
    int p_code;
    int pr_code;
    int z_code;
    float   p_parm[15];
    int g_units;    /* ground planimetric coordinates */
    int e_units;    /* elevation coordinates */
    int sides;
    float   corners[4][2];

    float   min_elevation;  /* minimum and maximum elevations */
    float   max_elevation;

    float   angle;
    int a_code;     /* Accuracy code */

    float   x_res;      /* Spatial Resolution */
    float   y_res;
    float   z_res;

    int rows;       /* number of rows and columns of profiles */
    int cols;
};

struct BRecord {
    int row_id;
    int col_id;
    int rows;
    int cols;
    float   x_gpc;
    float   y_gpc;
    float   elevation;
    float   min_elevation;
    float   max_elevation;
};


class DEMFile {
public:
    DEMFile(char *s) : fname(s), demfile(0) { }
    ~DEMFile() { if(demfile) fclose(demfile); }
    int*    process(void);
    void    dump_ARecord(void);
    void    dump_BRecord(void);
    void    dump_grid(void);
    void    range(double &x, double &y);
    void    resolution(double &r);

private:
    int open(void);
    int read_int(void);
    float   read_float(void);
    void    read_field(void);

    char        *fname;
    FILE        *demfile;
    struct ARecord  a;
    struct BRecord  b;
    int     *grid;
    char        tempbuf[1024];
};

#endif /* __dem_h__ */

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