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     VERBOSE (DEBUG, fprintf (stdout, "id -> n; %d -> %d\n", id, n));
  85
  86     /* set arguments */
  87     free_tab (argument);
  88     argument = NULL;
  89     VERBOSE (DEBUG, fprintf (stdout, "nbargs; %d\n", nbargs));
  90     if (nbargs > 0) {
  91         def (nbargs, args);
  92     }
  93
  94     /* backup context */
  95     workspace_t *tmp = backup_ws (alloc_ws ());
  96     restore_ws (programs[n]);
  97
  98     /* evaluate program */
  99     answer = 0;
 100     element_t *elements = dupelement (programs[n]->root);
 101     ret = evaluate_element (elements, 0);
 102     VERBOSE (DEBUG, fprintf (stdout, "ret; %g\n", ret));
 103     delelement (elements);
 104
 105     /* clean arguments */
 106     free_tab (argument);
 107     argument = NULL;
 108
 109     /* restore context */
 110     backup_ws (programs[n]);
 111     restore_ws (tmp);
 112     free_ws (tmp);
 113
 114     return ret;
 115 }
 116
 117 void list ()
 118 {
 119     int i;
 120     fprintf (stdout, "programs:");
 121     for (i = 0; i < nb_programs; i++) {
 122         fprintf (stdout, " %d", programs[i]->id);
 123     }
 124     fprintf (stdout, "\n");
 125 }
 126
 127 void edit (int id)
 128 {
 129     int n = lookfor_program (id);
 130     if (n == -1) {
 131         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 132         return;
 133     }
 134
 135     /* set string program */
 136     fprintf (stdout, "edit: %s\n", programs[n]->string);
 137 }
 138
 139 void savestring (int id, char *string)
 140 {
 141     int n = lookfor_program (id);
 142
 143     /* unnecesary code */
 144     //if (n == -1) {
 145     //    VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 146     //    return;
 147     //}
 148     //if (programs[n]->string) {
 149     //    free (programs[n]->string);
 150     //}
 151
 152     if (string) {
 153         programs[n]->string = strdup (string);
 154     }
 155 }
 156
 157 void del (int id)
 158 {
 159     int n = lookfor_program (id);
 160     if (n == -1) {
 161         VERBOSE (WARNING, fprintf (stdout, "error unknown program (%d)\n", id));
 162         return;
 163     }
 164
 165     /* clean program */
 166     free_ws (programs[n]);
 167
 168     /* remove entry */
 169     workspace_t **tmp = (workspace_t **) callocordie (nb_programs - 1, sizeof (workspace_t *));
 170     memcpy (tmp, programs, n * sizeof (workspace_t *));
 171     memcpy (tmp + n, programs + n + 1, (nb_programs - n - 1) * sizeof (workspace_t *));
 172     nb_programs--;
 173     free (programs);
 174     programs = tmp;
 175 }
 176
 177 /* vim: set ts=4 sw=4 et: */