/*! \file raster/get_cellhd.c \brief Raster library - Read raster map header (C) 2001-2009 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 Original author CERL */ #include #include #include #include #include /*! \brief Read the raster header The raster header for the raster map name in the specified mapset is read into the cellhd structure. If there is an error reading the raster header file, a diagnostic message is printed and -1 is returned. Otherwise, 0 is returned. Note:a warning message for errors encountered. Cell header files may contain either grid cell header information or reclass information. If it is a reclass file, it will specify the map and mapset names of the actual grid cell file being reclassed. Rast_get_cellhd(), upon reading reclass information will go read the cell header information for the referenced file. Only one reference is allowed. \param name name of map \param mapset mapset that map belongs to \param[out] cellhd structure to hold cell header info \return void */ void Rast_get_cellhd(const char *name, const char *mapset, struct Cell_head *cellhd) { FILE *fp; int is_reclass; char real_name[GNAME_MAX], real_mapset[GMAPSET_MAX]; /* is_reclass = Rast_is_reclass (name, mapset, real_name, real_mapset); if (is_reclass < 0) { sprintf (buf,"Can't read header file for [%s in %s]\n", name, mapset); tail = buf + strlen(buf); strcpy (tail, "It is a reclass file, but with an invalid format"); G_warning(buf); return -1; } */ is_reclass = (Rast_is_reclass(name, mapset, real_name, real_mapset) > 0); if (is_reclass) { fp = G_fopen_old("cellhd", real_name, real_mapset); if (!fp) G_fatal_error(_("Unable to read header file for raster map <%s@%s>." "It is a reclass of raster map <%s@%s> %s"), name, mapset, real_name, real_mapset, !G_find_raster(real_name, real_mapset) ? _("which is missing.") : _("whose header file can't be opened.")); } else { fp = G_fopen_old("cellhd", name, mapset); if (!fp) G_fatal_error(_("Unable to open header file for raster map <%s@%s>"), name, mapset); } G__read_Cell_head(fp, cellhd, 1); fclose(fp); }