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(searchCtx *ctx, struct searchNode *thenode);
  11 void *not_exe(searchCtx *ctx, struct searchNode *thenode, void *theinput);
  12
  13 struct searchNode *not_parse(searchCtx *ctx, 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=ctx->parser(ctx, type, argv[0]); /* Propogate the search type */
  32
  33   if (!subnode) {
  34     free(thenode);
  35     return NULL;
  36   }
  37
  38   /* Our subnode needs to return a BOOL */
  39   subnode=coerceNode(ctx, subnode, RETURNTYPE_BOOL);
  40
  41   thenode->localdata=(void *)subnode;
  42
  43   return thenode;
  44 }
  45
  46 void not_free(searchCtx *ctx, struct searchNode *thenode) {
  47   struct searchNode *subnode;
  48   subnode=thenode->localdata;
  49
  50   (subnode->free)(ctx, subnode);
  51   free(thenode);
  52 }
  53
  54 void *not_exe(searchCtx *ctx, struct searchNode *thenode, void *theinput) {
  55   struct searchNode *subnode;
  56
  57   subnode=thenode->localdata;
  58
  59   if ((subnode->exe)(ctx, subnode, theinput)) {
  60     return (void *)0;
  61   } else {
  62     return (void *)1;
  63   }
  64 }