newsearch/ns-not.c

   1 /*
   2  * NOT functionality
   3  */
   4
   5 #include "newsearch.h"
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9
  10 void not_free(struct searchNode *thenode);
  11 void *not_exe(struct searchNode *thenode, int type, void *theinput);
  12
  13 struct searchNode *not_parse(int type, int argc, char **argv) {
  14   searchNode *thenode, *subnode;
  15
  16   if (argc!=1) {
  17     parseError="not: usage: not (term)";
  18     return NULL;
  19   }
  20
  21   /* Allocate our actual node */
  22   if (!(thenode=(searchNode *)malloc(sizeof(searchNode)))) {
  23     parseError = "malloc: could not allocate memory for this search.";
  24     return NULL;
  25   }
  26
  27   thenode->returntype   = RETURNTYPE_BOOL;
  28   thenode->exe          = not_exe;
  29   thenode->free         = not_free;
  30
  31   subnode=search_parse(type, argv[0]); /* Propogate the search type */
  32
  33   if (!subnode) {
  34     free(thenode);
  35     return NULL;
  36   }
  37
  38   thenode->localdata=(void *)subnode;
  39
  40   return thenode;
  41 }
  42
  43 void not_free(struct searchNode *thenode) {
  44   struct searchNode *subnode;
  45   subnode=thenode->localdata;
  46
  47   (subnode->free)(subnode);
  48   free(thenode);
  49 }
  50
  51 void *not_exe(struct searchNode *thenode, int type, void *theinput) {
  52   void *ret;
  53   struct searchNode *subnode;
  54
  55   subnode=thenode->localdata;
  56
  57   ret = (subnode->exe)(subnode, RETURNTYPE_BOOL, theinput);
  58
  59   switch (type) {
  60
  61   case RETURNTYPE_INT:
  62   case RETURNTYPE_BOOL:
  63     if (ret==NULL) {
  64       return (void *)1;
  65     } else {
  66       return NULL;
  67     }
  68
  69   case RETURNTYPE_STRING:
  70     if (ret==NULL) {
  71       return "1";
  72     } else {
  73       return "";
  74     }
  75   }
  76
  77   return NULL;
  78 }