Function msValidateContexts

maputil.c:311–347

** Function to take a look at all layers with REQUIRES/LABELREQUIRES set to make sure there are no ** recursive context requirements set (e.g. layer1 requires layer2 and layer2 requires layer1). This ** is bug 1059. */

** is bug 1059.
*/
int msValidateContexts(mapObj *map) 
{
  int i;
  char **ltags;
  int status = MS_SUCCESS;

  ltags = (char **) msSmallMalloc(map->numlayers*sizeof(char *));
  for(i=0; i<map->numlayers; i++) {
    if(GET_LAYER(map, i)->name == NULL) {
      ltags[i] = msStrdup("[NULL]");
    } else {
      ltags[i] = (char *) msSmallMalloc(sizeof(char)*strlen(GET_LAYER(map, i)->name) + 3);
      sprintf(ltags[i], "[%s]", GET_LAYER(map, i)->name);
    }
  }

  /* check each layer's REQUIRES and LABELREQUIRES parameters */
  for(i=0; i<map->numlayers; i++) { 
    /* printf("working on layer %s, looking for references to %s\n", GET_LAYER(map, i)->name, ltags[i]); */
    if(searchContextForTag(map, ltags, ltags[i], GET_LAYER(map, i)->requires, MS_TRUE) == MS_SUCCESS) {
      msSetError(MS_PARSEERR, "Recursion error found for REQUIRES parameter for layer %s.", "msValidateContexts", GET_LAYER(map, i)->name);
      status = MS_FAILURE;
      break;
    }
    if(searchContextForTag(map, ltags, ltags[i], GET_LAYER(map, i)->labelrequires, MS_FALSE) == MS_SUCCESS) {
      msSetError(MS_PARSEERR, "Recursion error found for LABELREQUIRES parameter for layer %s.", "msValidateContexts", GET_LAYER(map, i)->name);
      status = MS_FAILURE;
      break;
    }
    /* printf("done layer %s\n", GET_LAYER(map, i)->name); */
  }

  /* clean up */
  msFreeCharArray(ltags, map->numlayers);

  return status;
}

int msEvalContext(mapObj *map, layerObj *layer, char *context)
{