alloc_target.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "target_struc.h"
#include "l12_parms.h"
 
/* --------------------------------------------------------- */
/* alloc_target() - allocates 1 target record to hold data   */
/*              for a single scan of "npix" pixels.          */
 
/* --------------------------------------------------------- */
int alloc_target(int32_t npix, int32_t nbands, tgstr *rec) {
    char *p;
    int32_t len = 3 * sizeof (int32_t) /* time   */
            + sizeof (float)*npix /* solz   */
            + 2 * nbands * sizeof (float)*npix; /* lw,nLw */
 
    if ((p = (char *) malloc(len)) == NULL) {
        fprintf(stderr,
                "-E- %s line %d: Memory allocation failure.\n",
                __FILE__, __LINE__);
        return (0);
    }
    memset(p, '\0', len);
 
    rec->length = len;
    rec->npix = npix;
    rec->data = p;
 
    rec->year = (int32_t *) p;
    p += sizeof (int32_t);
    rec->day = (int32_t *) p;
    p += sizeof (int32_t);
    rec->msec = (int32_t *) p;
    p += sizeof (int32_t);
    rec->solz = (float *) p;
    p += sizeof (float)*npix;
    rec->Lw = (float *) p;
    p += sizeof (float)*npix*nbands;
    rec->nLw = (float *) p;
    p += sizeof (float)*npix*nbands;
 
    return (len);
}