* FML interpreter. Europagate, 1995
*
* $Log: fml.c,v $
- * Revision 1.10 1995/02/21 17:46:08 adam
+ * Revision 1.15 1995/02/27 09:01:20 adam
+ * Regular expression support. Argument passing by name option. New FML
+ * function strlen.
+ *
+ * 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
return getchar ();
}
+static void default_write_func (int c)
+{
+ putchar (c);
+}
+
static void default_err_handle (int no)
{
fprintf (stderr, "Error: %d\n", no);
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 ();
void fml_cmd_lex (struct fml_node **np, struct token *tp)
{
+ fml_cmd_lex_s (np, tp, 1);
+}
+
+void fml_cmd_lex_s (struct fml_node **np, struct token *tp, int esc_stop)
+{
char *cp;
char *dst;
if (!*np)
}
while (*cp)
{
- if (*cp == tp->escape_char)
+ if (*cp == tp->escape_char && esc_stop)
{
*dst = '\0';
tp->offset = cp - tp->atombuf;
struct token *tp)
{
fml_cmd_lex (lp, tp);
- if (fml->debug & 1)
- putchar ('_');
+ if (fml->debug & 1)
+ (*fml->write_func) ('_');
else
- putchar (' ');
+ (*fml->write_func) (' ');
return NULL;
}
struct token *tp)
{
fml_cmd_lex (lp, tp);
- putchar ('\n');
+ (*fml->write_func) ('\n');
return NULL;
}
struct fml_node *fn;
struct fml_sym_info *arg_info;
struct fml_node *return_value;
- static char arg[128];
+ static char arg_name[128];
if (fml->debug & 1)
{
fml_cmd_lex (lp, tp);
for (fn = info->args; fn; fn = fn->p[1])
{
-
assert (fn->is_atom);
- fml_atom_strx (fn->p[0], arg, 127);
+ fml_atom_strx (fn->p[0], arg_name, 127);
if (fml->debug & 1)
{
pr_indent (1);
- printf ("%s=", arg);
+ printf ("%s=", arg_name);
}
- arg_info = fml_sym_add_local (fml->sym_tab, arg);
- arg_info->kind = FML_VAR;
-
- if (tp->kind == 'g')
+ if (*arg_name == fml->escape_char)
{
- arg_info->body = fml_sub0 (fml, tp->sub);
+ arg_info = fml_sym_add_local (fml->sym_tab, 1+arg_name);
+ arg_info->kind = FML_CODE;
+
+ if (tp->kind == 'g')
+ arg_info->body = tp->sub;
+ else
+ arg_info->body = NULL;
+ if (fml->debug & 1)
+ {
+ fml_pr_list (arg_info->body);
+ pr_indent (-1);
+ }
fml_cmd_lex (lp, tp);
}
else
- arg_info->body = fml_sub2 (fml, lp, tp);
- if (fml->debug & 1)
{
- fml_pr_list (arg_info->body);
- pr_indent (-1);
+ arg_info = fml_sym_add_local (fml->sym_tab, arg_name);
+ arg_info->kind = FML_VAR;
+
+ if (tp->kind == 'g')
+ {
+ arg_info->body = fml_sub0 (fml, tp->sub);
+ fml_cmd_lex (lp, tp);
+ }
+ else
+ arg_info->body = fml_sub2 (fml, lp, tp);
+ if (fml->debug & 1)
+ {
+ fml_pr_list (arg_info->body);
+ pr_indent (-1);
+ }
}
}
return_value = fml_exec_group (info->body, fml);
}
-static void fml_emit (struct fml_node *list)
+static void fml_emit (Fml fml, struct fml_node *list)
{
int s = 0;
while (list)
{
struct fml_atom *a;
if (s)
- printf (" ");
+ (*fml->write_func) (' ');
s++;
for (a = list->p[0]; a; a=a->next)
- printf ("%.*s", FML_ATOM_BUF, 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];
}
}
if (tp->kind == 'e')
{
info = fml_sym_lookup (fml->sym_tab, tp->tokenbuf);
- assert (info);
+ if (!info)
+ {
+ printf ("<<unknown %s in expression>>", tp->tokenbuf);
+ getchar ();
+ return NULL;
+ }
switch (info->kind)
{
case FML_VAR:
fn = fml_node_copy (fml, info->body);
fml_cmd_lex (lp, tp);
break;
+ case FML_CODE:
+ fn = fml_node_copy (fml, info->body);
+ fml_cmd_lex (lp, tp);
+ break;
case FML_PREFIX:
fn = fml_exec_prefix (info, fml, lp, tp);
break;
struct fml_node *fn;
fn = fml_sub1 (fml, lp, tp);
- fml_emit (fn);
+ fml_emit (fml, fn);
fml_node_delete (fml, fn);
}
while (1)
{
fml_cmd_lex (&list, &token);
- if (token.kind != 't')
+ if (token.kind != 't' && token.kind != 'e')
break;
if (!info->args)
{
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);
pr_indent (-1);
}
continue;
+ case FML_CODE:
+ fml_exec_group (info->body, fml);
+ break;
default:
- printf ("unknown token: `%s'", token.tokenbuf);
+ printf ("<unknown token: `%s'>", token.tokenbuf);
fml_cmd_lex (&list, &token);
}
}
else
{
- printf ("<unknown>");
+ printf ("<unknown %s>", token.tokenbuf);
}
break;
case 't':
if (token.separate && !first)
- putchar (' ');
+ (*fml->write_func) (' ');
first = 0;
fml_emit_expr (fml, &list, &token);
fml_node_stat (fml);