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     if (argument) {
 104         free_tab (argument);
 105     }
 106     argument = NULL;
 107     if (nbargs > 0) {
 108         def (nbargs, args);
 109     }
 110
 111     /* restore context */
 112     backup_ws (programs[n]);
 113     restore_ws (tmp);
 114
 115     return ret;
 116 }
 117
 118 void list ()
 119 {
 120     int i;
 121     fprintf (stdout, "programs:");
 122     for (i = 0; i < nb_programs; i++) {
 123         fprintf (stdout, " %d", programs[i]->id);
 124     }
 125     fprintf (stdout, "\n");
 126 }
 127
 128 void edit (int id)
 129 {
 130     int n = lookfor_program (id);
 131     if (n == -1) {
 132         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 133         return;
 134     }
 135
 136     /* set string program */
 137     fprintf (stdout, "edit: %s\n", programs[n]->string);
 138 }
 139
 140 void savestring (int id, char *string)
 141 {
 142     int n = lookfor_program (id);
 143
 144     /* unnecesary code */
 145     //if (n == -1) {
 146     //    VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 147     //    return;
 148     //}
 149     //if (programs[n]->string) {
 150     //    free (programs[n]->string);
 151     //}
 152
 153     if (string) {
 154         programs[n]->string = strdup (string);
 155     }
 156 }
 157
 158 void del (int id)
 159 {
 160     int n = lookfor_program (id);
 161     if (n == -1) {
 162         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 163         return;
 164     }
 165
 166     /* clean program */
 167     free_ws (programs[n]);
 168
 169     /* remove entry */
 170     workspace_t **tmp = (workspace_t **) callocordie (nb_programs - 1, sizeof (workspace_t *));
 171     memcpy (tmp, programs, n * sizeof (workspace_t *));
 172     memcpy (tmp + n, programs + n + 1, (nb_programs - n - 1) * sizeof (workspace_t *));
 173     nb_programs--;
 174     free (programs);
 175     programs = tmp;
 176 }
 177
 178 /* vim: set ts=4 sw=4 et: */