Changed header.

[egate.git] / fml / fml.c

diff --git a/fml/fml.c b/fml/fml.c
index b2eb160..c80c3bf 100644 (file)
--- a/fml/fml.c
+++ b/fml/fml.c
@@ -2,7 +2,37 @@
  * FML interpreter. Europagate, 1995
  *
  * $Log: fml.c,v $
- * Revision 1.5  1995/02/09 14:33:36  adam
+ * Revision 1.14  1995/02/23 08:32:04  adam
+ * Changed header.
+ *
+ * Revision 1.12  1995/02/22  15:20:13  adam
+ * Bug fix in fml_exec_space.
+ *
+ * Revision 1.11  1995/02/22  08:50:49  adam
+ * Definition of CPP changed. Output function can be customized.
+ *
+ * Revision 1.10  1995/02/21  17:46:08  adam
+ * Bug fix in fml_sub0.
+ *
+ * Revision 1.9  1995/02/21  14:00:03  adam
+ * Minor changes.
+ *
+ * Revision 1.8  1995/02/10  18:15:52  adam
+ * FML function 'strcmp' implemented. This function can be used to
+ * test for existence of MARC fields.
+ *
+ * Revision 1.7  1995/02/10  15:50:54  adam
+ * MARC interface implemented. Minor bugs fixed. fmltest can
+ * be used to format single MARC records. New function '\list'
+ * implemented.
+ *
+ * Revision 1.6  1995/02/09  16:06:06  adam
+ * FML can be called from the outside multiple times by the functions:
+ * fml_exec_call and fml_exec_call_str.
+ * An interactive parameter (-i) to fmltest starts a shell-like
+ * interface to FML by using the fml_exec_call_str function.
+ *
+ * Revision 1.5  1995/02/09  14:33:36  adam
  * Split source fml.c and define relevant build-in functions in separate
  * files. New operators mult, div, not, llen implemented.
  *
@@ -35,6 +65,11 @@ static int default_read_func (void)
     return getchar ();
 }
 
+static void default_write_func (int c)
+{
+    putchar (c);
+}
+
 static void default_err_handle (int no)
 {
     fprintf (stderr, "Error: %d\n", no);
@@ -88,6 +123,7 @@ Fml fml_open (void)
     fml->white_chars = " \t\f\r\n";
     fml->read_func = default_read_func;
     fml->err_handle = default_err_handle;
+    fml->write_func = default_write_func;
 
     fml->list = NULL;
     fml->sym_tab = fml_sym_open ();
@@ -115,6 +151,7 @@ Fml fml_open (void)
     fml_list_init (fml);
     fml_arit_init (fml);
     fml_rel_init (fml);
+    fml_str_init (fml);
 
     sym_info = fml_sym_add (fml->sym_tab, "s");
     sym_info->kind = FML_CPREFIX;
@@ -256,8 +293,6 @@ struct fml_node *fml_expr_term (Fml fml, struct fml_node **lp,
     return fn;
 }
 
-static struct fml_node *fml_exec_group (struct fml_node *list, Fml fml);
-
 void fml_lr_values (Fml fml, struct fml_node *l, int *left_val,
                            struct fml_node *r, int *right_val)
 {
@@ -277,7 +312,11 @@ static struct fml_node *fml_exec_space (Fml fml, struct fml_node **lp,
                                         struct token *tp)
 {
     fml_cmd_lex (lp, tp);
-    putchar ('_');
+    if (fml->debug & 1) 
+        (*fml->write_func) ('_');
+    else
+        (*fml->write_func) (' ');
+        putchar (' ');
     return NULL;
 }
 
@@ -285,7 +324,7 @@ static struct fml_node *fml_exec_nl (Fml fml, struct fml_node **lp,
                                      struct token *tp)
 {
     fml_cmd_lex (lp, tp);
-    putchar ('\n');
+    (*fml->write_func) ('\n');
     return NULL;
 }
 
@@ -342,7 +381,7 @@ static struct fml_node *fml_exec_prefix (struct fml_sym_info *info, Fml fml,
 }
 
 
-static void fml_emit (struct fml_node *list)
+static void fml_emit (Fml fml, struct fml_node *list)
 {
     int s = 0;
     while (list)
@@ -351,13 +390,17 @@ static void fml_emit (struct fml_node *list)
         {
             struct fml_atom *a;
             if (s)
-                printf (" ");
+                (*fml->write_func) (' ');
             s++;
             for (a = list->p[0]; a; a=a->next)
-                printf ("%s", a->buf);
+            {
+                int i = 0;
+                while (i < FML_ATOM_BUF && a->buf[i])
+                    (*fml->write_func) (a->buf[i++]);
+            }
         }
         else
-            fml_emit (list->p[0]);
+            fml_emit (fml, list->p[0]);
         list = list->p[1];
     }
 }
@@ -383,7 +426,6 @@ static struct fml_node *fml_sub2 (Fml fml, struct fml_node **lp,
             break;
         case FML_CPREFIX:
             fn = (*info->prefix) (fml, lp, tp);
-            fml_cmd_lex (lp, tp);
             break;
         default:
             fml_cmd_lex (lp, tp);
@@ -516,9 +558,13 @@ static struct fml_node *fml_sub0 (Fml fml, struct fml_node *list)
     if (!list)
         return NULL;
     fml_init_token (&token, fml);
-    assert (list);
     fml_cmd_lex (&list, &token);
     fn1 = fn = fml_sub1 (fml, &list, &token);
+    if (!fn)
+    {
+        fml_del_token (&token, fml);
+        return fn;
+    }
     if (fn->p[1] && token.kind != '\0')
     {
         fn1 = fml_node_alloc (fml);
@@ -563,8 +609,9 @@ static struct fml_node *fml_exec_foreach (struct fml_sym_info *info, Fml fml,
     }
     else
     {
-        fml_node_delete (fml, info->body);
-        info->body = NULL;
+        if (info_var->kind == FML_VAR)
+            fml_node_delete (fml, info_var->body);
+        info_var->body = NULL;
     }
     if (fml->debug & 1)
     {
@@ -720,11 +767,11 @@ static void fml_emit_expr (Fml fml, struct fml_node **lp, struct token *tp)
     struct fml_node *fn;
 
     fn = fml_sub1 (fml, lp, tp);
-    fml_emit (fn);
+    fml_emit (fml, fn);
     fml_node_delete (fml, fn);
 }
 
-static struct fml_node *fml_exec_group (struct fml_node *list, Fml fml)
+struct fml_node *fml_exec_group (struct fml_node *list, Fml fml)
 {
     struct token token;
     struct fml_sym_info *info;
@@ -809,7 +856,7 @@ static struct fml_node *fml_exec_group (struct fml_node *list, Fml fml)
                 case FML_PREFIX:
                 case FML_CPREFIX:
                     if (token.separate && !first)
-                        putchar (' ');
+                        (*fml->write_func) (' ');
                     first = 1;
                     fml_emit_expr (fml, &list, &token);
                     fml_node_stat (fml);
@@ -862,11 +909,8 @@ static struct fml_node *fml_exec_group (struct fml_node *list, Fml fml)
             }
             break;
         case 't':
-#if 0
-            printf ("<token.tokenbuf=%s>", token.tokenbuf);
-#endif
             if (token.separate && !first)
-                putchar (' ');
+                (*fml->write_func) (' ');
             first = 0;
             fml_emit_expr (fml, &list, &token);
             fml_node_stat (fml);
@@ -883,5 +927,5 @@ void fml_exec (Fml fml)
     fml_node_stat (fml);
     fml_exec_group (fml->list, fml);
     if (fml->debug & 1)
-        printf ("\n");
+        putchar ('\n');
 }