find_file.c

Go to the documentation of this file.

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

static char *find_file(int misc,
                       const char *dir,
                       const char *element,
                       const char *name, const char *mapset)
{
    char path[GPATH_MAX];
    char xname[GNAME_MAX], xmapset[GMAPSET_MAX];
    const char *pname, *pmapset;
    int n;

    if (*name == 0)
        return NULL;
    *path = 0;

    /*
     * if name is in the fully qualified format, split it into
     * name, mapset (overrides what was in mapset)
     */
    if (G__name_is_fully_qualified(name, xname, xmapset)) {
        pname = xname;
        pmapset = xmapset;
    }
    else {
        pname = name;
        pmapset = mapset;
    }

    /*
     * reject illegal names and mapsets
     */
    if (G_legal_filename(pname) == -1)
        return NULL;

    if (pmapset && *pmapset && G_legal_filename(pmapset) == -1)
        return NULL;

    /*
     * if no specific mapset is to be searched
     * then search all mapsets in the mapset search list
     */
    if (pmapset == NULL || *pmapset == 0) {
        int cnt = 0;
        const char *pselmapset = NULL;

        for (n = 0; (pmapset = G__mapset_name(n)); n++) {
            if (misc)
                G__file_name_misc(path, dir, element, pname, pmapset);
            else
                G__file_name(path, element, pname, pmapset);
            if (access(path, 0) == 0) {
                if (!pselmapset)
                    pselmapset = pmapset;
                else
                    G_warning(_("'%s/%s' was found in more mapsets (also found in <%s>)"),
                              element, pname, pmapset);
                cnt++;
            }
        }
        if (cnt > 0) {
            /* If the same name exists in more mapsets and print a warning */
            if (cnt > 1)
                G_warning(_("Using <%s@%s>"),
                          pname, pselmapset);
            
            return (char *)pselmapset;
        }
    }
    /*
     * otherwise just look for the file in the specified mapset.
     * since the name may have been qualified, mapset may point
     * to the xmapset, so we must should it to
     * permanent storage via G_store().
     */
    else {
        if (misc)
            G__file_name_misc(path, dir, element, pname, pmapset);
        else
            G__file_name(path, element, pname, pmapset);
            
        if (access(path, 0) == 0)
            return G_store(pmapset);
    }
    
    return NULL;
}



static char *find_file1(int misc,
                        const char *dir,
                        const char *element, char *name, const char *mapset)
{
    char xname[GNAME_MAX], xmapset[GMAPSET_MAX];
    const char *pname, *pmapset;
    char *mp;

    if (G__name_is_fully_qualified(name, xname, xmapset)) {
        pname = xname;
        pmapset = xmapset;
    }
    else {
        pname = name;
        pmapset = mapset;
    }

    mp = find_file(misc, dir, element, pname, pmapset);

    if (mp && name != pname)
        strcpy(name, pname);

    return mp;
}

char *G_find_file(const char *element, char *name, const char *mapset)
{
    return find_file1(0, NULL, element, name, mapset);
}

char *G_find_file_misc(const char *dir,
                       const char *element, char *name, const char *mapset)
{
    return find_file1(1, dir, element, name, mapset);
}


char *G_find_file2(const char *element, const char *name, const char *mapset)
{
    return find_file(0, NULL, element, name, mapset);
}

char *G_find_file2_misc(const char *dir,
                        const char *element,
                        const char *name, const char *mapset)
{
    return find_file(1, dir, element, name, mapset);
}