newsearch/ns-and.c

   1 /*
   2  * AND functionality
   3  */
   4
   5 #include "newsearch.h"
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9
  10 void and_free(struct searchNode *thenode);
  11 void *and_exe(struct searchNode *thenode, int type, void *theinput);
  12
  13 struct and_localdata {
  14   int count;
  15   searchNode **nodes;
  16 };
  17
  18 struct searchNode *and_parse(int type, int argc, char **argv) {
  19   searchNode *thenode, *subnode;
  20   struct and_localdata *localdata;
  21   int i;
  22
  23   /* Set up our local data - a list of nodes to AND together */
  24   localdata=(struct and_localdata *)malloc(sizeof(struct and_localdata));
  25   localdata->nodes=(searchNode **)malloc(argc * sizeof(searchNode *));
  26   localdata->count=0;
  27
  28   /* Allocate our actual node */
  29   thenode=(searchNode *)malloc(sizeof(searchNode));
  30
  31   thenode->returntype   = RETURNTYPE_BOOL;
  32   thenode->localdata    = localdata;
  33   thenode->exe          = and_exe;
  34   thenode->free         = and_free;
  35
  36   for (i=0;i<argc;i++) {
  37     subnode=search_parse(type, argv[i]); /* Propogate the search type */
  38     if (subnode) {
  39       localdata->nodes[localdata->count++] = subnode;
  40     } else {
  41       and_free(thenode);
  42       return NULL;
  43     }
  44   }
  45
  46   return thenode;
  47 }
  48
  49 void and_free(struct searchNode *thenode) {
  50   struct and_localdata *localdata;
  51   int i;
  52
  53   localdata=thenode->localdata;
  54   for (i=0;i<localdata->count;i++) {
  55     (localdata->nodes[i]->free)(localdata->nodes[i]);
  56   }
  57
  58   free(localdata->nodes);
  59   free(localdata);
  60   free(thenode);
  61 }
  62
  63 void *and_exe(struct searchNode *thenode, int type, void *theinput) {
  64   int i;
  65   void *ret;
  66   struct and_localdata *localdata;
  67
  68   localdata=thenode->localdata;
  69
  70   for (i=0;i<localdata->count;i++) {
  71     ret = (localdata->nodes[i]->exe)(localdata->nodes[i], RETURNTYPE_BOOL, theinput);
  72     if (ret == NULL) {
  73       switch (type) {
  74
  75       case RETURNTYPE_INT:
  76       case RETURNTYPE_BOOL:
  77         return NULL;
  78
  79       case RETURNTYPE_STRING:
  80         return "";
  81       }
  82     }
  83   }
  84
  85   switch (type) {
  86   case RETURNTYPE_INT:
  87   case RETURNTYPE_BOOL:
  88     return (void *)1;
  89
  90   case RETURNTYPE_STRING:
  91     return "1";
  92   }
  93
  94   return NULL;
  95 }