sigfile.c

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/*!
   \file lib/imagery/sigfile.c
 
   \brief Imagery Library - Signature file functions (statistics for i.maxlik).
 
   (C) 2001-2008, 2013, 2021 by the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \author USA CERL
 */
 
#include <string.h>
#include <grass/imagery.h>
 
/*!
   \brief Create signature file
 
   Returns a pointer to FILE for writing signature file.
   Use fclose on the pointer to close after use.
 
   \param name signature filename
 
   \return pointer to FILE
   \return NULL on error
 */
FILE *I_fopen_signature_file_new(const char *name)
{
    char dir[GNAME_MAX];
    FILE *fd;
 
    /* create sig directory */
    I_make_signatures_dir(I_SIGFILE_TYPE_SIG);
    I_get_signatures_dir(dir, I_SIGFILE_TYPE_SIG);
    fd = G_fopen_new_misc(dir, "sig", name);
 
    return fd;
}
 
/*!
   \brief Open existing signature file
 
   Use fully qualified names for signatures from other mapsets.
 
   Returns a pointer to FILE with signature. Use fclose on the pointer
   after use.
 
   \param name signature filename
 
   \return pointer to FILE
   \return NULL on error
 */
FILE *I_fopen_signature_file_old(const char *name)
{
    char sig_name[GNAME_MAX], sig_mapset[GMAPSET_MAX];
    char dir[GNAME_MAX];
    FILE *fd;
 
    if (G_unqualified_name(name, NULL, sig_name, sig_mapset) == 0)
        strcpy(sig_mapset, G_mapset());
 
    I_get_signatures_dir(dir, I_SIGFILE_TYPE_SIG);
    fd = G_fopen_old_misc(dir, "sig", sig_name, sig_mapset);
 
    return fd;
}