program.c

   1 #include <malloc.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 #include "alloc.h"
   6 #include "argument.h"
   7 #include "debug.h"
   8 #include "parser.h"
   9 #include "stack.h"
  10 #include "storage.h"
  11 #include "tabular.h"
  12 #include "workspace.h"
  13
  14 #include "program.h"
  15
  16 /* global variables */
  17
  18 workspace_t **programs = NULL;
  19 int nb_programs = 0;
  20
  21 /* lookfor program id */
  22
  23 int lookfor_program (int id)
  24 {
  25     int i;
  26     for (i = 0; (programs) && (i < nb_programs); i++) {
  27         if (programs[i]->id == id) {
  28             return i;
  29         }
  30     }
  31     return -1;
  32 }
  33
  34 /* program function */
  35
  36 void prog (int id, element_t *root)
  37 {
  38     int n = -1;
  39
  40     if (programs == NULL) {
  41
  42         /* initial memory allocation */
  43         programs = (workspace_t **) callocordie (1, sizeof (workspace_t *));
  44         n = 0;
  45         nb_programs = 1;
  46         programs[n] = alloc_ws ();
  47
  48     } else {
  49
  50         /* look for existing program */
  51         n = lookfor_program (id);
  52         if (n == -1) {
  53
  54             /* new program */
  55             n = nb_programs++;
  56             workspace_t **tmp = (workspace_t **) callocordie (nb_programs, sizeof (workspace_t *));
  57             memcpy (tmp, programs, (nb_programs - 1) * sizeof (workspace_t *));
  58             free (programs);
  59             programs = tmp;
  60             programs[n] = alloc_ws ();
  61
  62         } else {
  63
  64             /* clean old program */
  65             clean_ws(programs[n]);
  66         }
  67     }
  68
  69     /* set program */
  70     programs[n]->id = id;
  71     programs[n]->root = dupelement (root);
  72 }
  73
  74 double call (int id, int nbargs, element_t **args)
  75 {
  76     double ret = 0;
  77
  78     /* look for program */
  79     int n = lookfor_program (id);
  80     if (n == -1) {
  81         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
  82         return 0;
  83     }
  84
  85     /* backup context */
  86     workspace_t *tmp = backup_ws (alloc_ws ());
  87     restore_ws (programs[n]);
  88
  89     /* set arguments */
  90     free_tab (argument);
  91     argument = NULL;
  92     if (nbargs > 0) {
  93         def (nbargs, args);
  94     }
  95
  96     /* evaluate program */
  97     answer = 0;
  98     element_t *elements = dupelement (programs[n]->root);
  99     ret = evaluate_element (elements, 0);
 100     delelement (elements);
 101
 102     /* clean arguments */
 103     free_tab (argument);
 104     argument = NULL;
 105
 106     /* restore context */
 107     backup_ws (programs[n]);
 108     restore_ws (tmp);
 109     free_ws (tmp);
 110
 111     return ret;
 112 }
 113
 114 void list ()
 115 {
 116     int i;
 117     fprintf (stdout, "programs:");
 118     for (i = 0; i < nb_programs; i++) {
 119         fprintf (stdout, " %d", programs[i]->id);
 120     }
 121     fprintf (stdout, "\n");
 122 }
 123
 124 void edit (int id)
 125 {
 126     int n = lookfor_program (id);
 127     if (n == -1) {
 128         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 129         return;
 130     }
 131
 132     /* set string program */
 133     fprintf (stdout, "edit: %s\n", programs[n]->string);
 134 }
 135
 136 void savestring (int id, char *string)
 137 {
 138     int n = lookfor_program (id);
 139
 140     /* unnecesary code */
 141     //if (n == -1) {
 142     //    VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 143     //    return;
 144     //}
 145     //if (programs[n]->string) {
 146     //    free (programs[n]->string);
 147     //}
 148
 149     if (string) {
 150         programs[n]->string = strdup (string);
 151     }
 152 }
 153
 154 void del (int id)
 155 {
 156     int n = lookfor_program (id);
 157     if (n == -1) {
 158         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 159         return;
 160     }
 161
 162     /* clean program */
 163     free_ws (programs[n]);
 164
 165     /* remove entry */
 166     workspace_t **tmp = (workspace_t **) callocordie (nb_programs - 1, sizeof (workspace_t *));
 167     memcpy (tmp, programs, n * sizeof (workspace_t *));
 168     memcpy (tmp + n, programs + n + 1, (nb_programs - n - 1) * sizeof (workspace_t *));
 169     nb_programs--;
 170     free (programs);
 171     programs = tmp;
 172 }
 173
 174 /* vim: set ts=4 sw=4 et: */