cell_title.c

Go to the documentation of this file.

/**************************************************************
 * char *Rast_get_cell_title (name, mapset)
 *   char *name        name of map file
 *   char *mapset      mapset containing name
 *
 *   returns pointer to string containing cell title. (from cats file)
 *************************************************************/
 
#include <grass/gis.h>
 
/*!
 * \brief get raster map title
 *
 * If only the map layer title is needed, it is not necessary to read the
 * entire category file into memory. This routine gets the title for raster map
 * <b>name</b> in <b>mapset</b> directly from the category file, and returns
 * a pointer to the title. A legal pointer is always returned. If the map layer
 * does not have a title, then a pointer to the empty string "" is returned.
 *
 *  \param name
 *  \param mapset
 *  \return char *
 */
char *Rast_get_cell_title(const char *name, const char *mapset)
{
    FILE *fd;
    int stat;
    char title[1024];
 
    stat = -1;
    fd = G_fopen_old("cats", name, mapset);
    if (fd) {
        stat = 1;
        if (!fgets(title, sizeof title, fd)) /* skip number of cats */
            stat = -1;
        else if (!G_getl(title, sizeof title, fd)) /* read title */
            stat = -1;
 
        fclose(fd);
    }
 
    if (stat < 0)
        *title = 0;
    else
        G_strip(title);
    return G_store(title);
}