Function processIfTag

maptemplate.c:684–819

! * this function process all if tag in pszInstr. * this function return a modified pszInstr. * ht mus contain all variables needed by the function * to interpret if expression. * * If bLastPass is true then all tests for 'null' values will be * considered true if the corresponding value is not set. */

 * considered true if the corresponding value is not set.
*/
int processIfTag(char **pszInstr, hashTableObj *ht, int bLastPass)
{
/*   char *pszNextInstr = pszInstr; */
   char *pszStart, *pszEnd=NULL;
   char *pszName, *pszValue, *pszOperator, *pszThen=NULL, *pszHTValue;
   char *pszIfTag;
   char *pszPatIn=NULL, *pszPatOut=NULL, *pszTmp;
   int nInst = 0;
   int bEmpty = 0;
   int nLength;

   hashTableObj *ifArgs=NULL;

   if(!*pszInstr) {
     msSetError(MS_WEBERR, "Invalid pointer.", "processIfTag()");
     return MS_FAILURE;
   }

   /* find the if start tag */
   
   pszStart  = findTag(*pszInstr, "if");

   while (pszStart) {
     pszPatIn  = findTag(pszStart, "if");
     pszPatOut = strstr(pszStart, "[/if]");
     pszTmp = pszPatIn;
      
     do {
       if(pszPatIn && pszPatIn < pszPatOut) {
         nInst++;         
         pszTmp = pszPatIn;
       }
      
       if(pszPatOut && ((pszPatIn == NULL) || pszPatOut < pszPatIn)) {
         pszEnd = pszPatOut;
         nInst--;         
         pszTmp = pszPatOut;         
       }

       pszPatIn  = findTag(pszTmp+1, "if");
       pszPatOut = strstr(pszTmp+1, "[/if]");
      
     } while (pszTmp != NULL && nInst > 0);

     /* get the then string (if expression is true) */
     if(getInlineTag("if", pszStart, &pszThen) != MS_SUCCESS) {
       msSetError(MS_WEBERR, "Malformed then if tag.", "processIfTag()");
       return MS_FAILURE;
     }
      
     /* retrieve if tag args */
     if(getTagArgs("if", pszStart, &ifArgs) != MS_SUCCESS) {
       msSetError(MS_WEBERR, "Malformed args if tag.", "processIfTag()");
       return MS_FAILURE;
     }
      
     pszName = msLookupHashTable(ifArgs, "name");
     pszValue = msLookupHashTable(ifArgs, "value");