Function msPostGISReplaceBoxToken

mappostgis.c:1740–1791

** msPostGISReplaceBoxToken() ** ** Convert a fromsource data statement into something usable by replacing the !BOX! token. ** ** Returns malloc'ed char* that must be freed by caller. */

** Returns malloc'ed char* that must be freed by caller.
*/
static char *msPostGISReplaceBoxToken(layerObj *layer, rectObj *rect, const char *fromsource) 
{
    char *result = NULL;
    
    if ( strstr(fromsource, BOXTOKEN) && rect ) {
        char *strBox = NULL;
        char *strSRID = NULL;

        /* We see to set the SRID on the box, but to what SRID? */
        strSRID = msPostGISBuildSQLSRID(layer);
        if ( ! strSRID ) {
            return NULL;
        }

        /* Create a suitable SQL string from the rectangle and SRID. */
        strBox = msPostGISBuildSQLBox(layer, rect, strSRID);
        if ( ! strBox ) {
            msSetError(MS_MISCERR, "Unable to build box SQL.", "msPostGISReplaceBoxToken()");
            if (strSRID) free(strSRID);
            return NULL;
        }

        /* Do the substitution. */
        while ( strstr(fromsource, BOXTOKEN) ) {
            char    *start, *end;
            char    *oldresult = result;
            size_t buffer_size = 0;
            start = strstr(fromsource, BOXTOKEN);
            end = start + BOXTOKENLENGTH;

            buffer_size = (start - fromsource) + strlen(strBox) + strlen(end) +1;
            result = (char*)msSmallMalloc(buffer_size);

            strlcpy(result, fromsource, start - fromsource +1);
            strlcpy(result + (start - fromsource), strBox, buffer_size-(start - fromsource));
            strlcat(result, end, buffer_size);

            fromsource = result;
            if (oldresult != NULL)
                free(oldresult);
        }

        if (strSRID) free(strSRID);
        if (strBox) free(strBox);
    }    
    else
    {
        result = msStrdup(fromsource);
    }
    return result;
    
}

/*
** msPostGISBuildSQLFrom()