legal_name.c

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#include <stdio.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/glocale.h>


int G_legal_filename(const char *s)
{
    if (*s == '.' || *s == 0) {
        fprintf(stderr, _("Illegal filename.  Cannot be '.' or 'NULL'\n"));
        return -1;
    }

    for (; *s; s++)
        if (*s == '/' || *s == '"' || *s == '\'' || *s <= ' ' ||
            *s == '@' || *s == ',' || *s == '=' || *s == '*' || *s > 0176) {
            fprintf(stderr,
                    _("Illegal filename. Character <%c> not allowed.\n"), *s);
            return -1;
        }

    return 1;
}


int G_check_input_output_name(const char *input, const char *output,
                              int error)
{
    char *mapset;

    if (output == NULL)
        return 0;               /* don't die on undefined parameters */
    if (G_legal_filename(output) == -1) {
        if (error == GR_FATAL_EXIT) {
            G_fatal_error(_("Output raster map name <%s> is not valid map name"),
                          output);
        }
        else if (error == GR_FATAL_PRINT) {
            G_warning(_("Output raster map name <%s> is not valid map name"),
                      output);
            return 1;
        }
        else {                  /* GR_FATAL_RETURN */
            return 1;
        }
    }

    mapset = G_find_cell2(input, "");

    if (mapset == NULL) {
        if (error == GR_FATAL_EXIT) {
            G_fatal_error(_("Raster map <%s> not found"), input);
        }
        else if (error == GR_FATAL_PRINT) {
            G_warning(_("Raster map <%s> not found"), input);
            return 1;
        }
        else {                  /* GR_FATAL_RETURN */
            return 1;
        }
    }

    if (strcmp(mapset, G_mapset()) == 0) {
        char nm[1000], ms[1000];
        const char *in;

        if (G__name_is_fully_qualified(input, nm, ms)) {
            in = nm;
        }
        else {
            in = input;
        }

        if (strcmp(in, output) == 0) {
            if (error == GR_FATAL_EXIT) {
                G_fatal_error(_("Output raster map <%s> is used as input"),
                              output);
            }
            else if (error == GR_FATAL_PRINT) {
                G_warning(_("Output raster map <%s> is used as input"),
                          output);
                return 1;
            }
            else {              /* GR_FATAL_RETURN */
                return 1;
            }
        }
    }

    return 0;
}