Function msGMLGetConstants

mapgml.c:911–965

}

gmlConstantListObj *msGMLGetConstants(layerObj *layer, const char *metadata_namespaces)
{
  int i;
  const char *value=NULL;
  char tag[64];

  char **names=NULL;
  int numnames=0;

  gmlConstantListObj *constantList=NULL;
  gmlConstantObj *constant=NULL;

  /* allocate the collection */
  constantList = (gmlConstantListObj *) malloc(sizeof(gmlConstantListObj)); 
  MS_CHECK_ALLOC(constantList, sizeof(gmlConstantListObj), NULL);
  constantList->constants = NULL;
  constantList->numconstants = 0;

  /* list of constants (TODO: make this automatic by parsing metadata) */
  if((value = msOWSLookupMetadata(&(layer->metadata), metadata_namespaces, "constants")) != NULL) {
    names = msStringSplit(value, ',', &numnames);

    /* allocation an array of gmlConstantObj's */
    constantList->numconstants = numnames;
    constantList->constants = (gmlConstantObj *) malloc(sizeof(gmlConstantObj)*constantList->numconstants);
    if (constantList->constants == NULL)
    {
        msSetError(MS_MEMERR, "Out of memory allocating %u bytes.\n", "msGMLGetConstants()",
                   sizeof(gmlConstantObj)*constantList->numconstants);
        free(constantList);
        return NULL;      
    }


    for(i=0; i<constantList->numconstants; i++) {
      constant = &(constantList->constants[i]);

      constant->name = msStrdup(names[i]); /* initialize a few things */      
      constant->value = NULL;
      constant->type = NULL;

      snprintf(tag, 64, "%s_value", constant->name);
      if((value = msOWSLookupMetadata(&(layer->metadata), metadata_namespaces, tag)) != NULL) 
      constant->value = msStrdup(value);

      snprintf(tag, 64, "%s_type", constant->name);
      if((value = msOWSLookupMetadata(&(layer->metadata), metadata_namespaces, tag)) != NULL) 
      constant->type = msStrdup(value);
    }

    msFreeCharArray(names, numnames);
  } 
  
  return constantList;
}

void msGMLFreeConstants(gmlConstantListObj *constantList)
{