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 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, 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   if(!subnode) {
  41     free(thenode);
  42     return NULL;
  43   }
  44
  45   thenode->localdata=(void *)subnode;
  46
  47   return thenode;
  48 }
  49
  50 void not_free(searchCtx *ctx, struct searchNode *thenode) {
  51   struct searchNode *subnode;
  52   subnode=thenode->localdata;
  53
  54   (subnode->free)(ctx, subnode);
  55   free(thenode);
  56 }
  57
  58 void *not_exe(searchCtx *ctx, struct searchNode *thenode, void *theinput) {
  59   struct searchNode *subnode;
  60
  61   subnode=thenode->localdata;
  62
  63   if ((subnode->exe)(ctx, subnode, theinput)) {
  64     return (void *)0;
  65   } else {
  66     return (void *)1;
  67   }
  68 }