-/*
- * ginsh.l - GiNaC Interactive Shell, lexical analyzer definition
+/** @file ginsh_lexer.ll
+ *
+ * Lexical analyzer definition for ginsh.
+ * This file must be processed with flex.
+ *
+ * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
- * This file must be processed with flex
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
%{
#include "config.h"
-#include <stdio.h>
-extern "C" {
-#include <readline/readline.h>
-#include <readline/history.h>
-}
-#include <map>
-
-#include <ginac/ginac.h>
#include "ginsh.h"
-
#include "ginsh_parser.h"
#define YY_INPUT(buf, result, max_size) (result = ginsh_input(buf, max_size))
{
int result;
if (yy_current_buffer->yy_is_interactive) {
- int actual;
-
+#ifdef HAVE_LIBREADLINE
// Do we need to read a new line?
+ int actual;
if (line_length == 0) {
// Free old line
line_length -= actual;
line_ptr += actual;
result = actual;
-
+#else
+ printf("> "); fflush(stdout);
+ int c = '*', n;
+ for (n = 0; n < max_size && (c = getc(yyin)) != EOF && c != '\n'; ++n)
+ buf[n] = (char)c;
+ if (c == '\n')
+ buf[n++] = (char)c;
+ if (c == EOF && ferror(yyin))
+ YY_FATAL_ERROR("input in flex scanner failed");
+ result = n;
+#endif
} else if (((result = fread(buf, 1, max_size, yyin)) == 0) && ferror(yyin))
YY_FATAL_ERROR("input in flex scanner failed");
return result;
}
-// Scanner terminates on EOF
+// List of input files to be processed
+int num_files = 0;
+char **file_list = NULL;
+
+// EOF encountered, connect to next file. If this was the last file,
+// connect to stdin. If this was stdin, terminate the scanner.
int yywrap()
{
- return 1;
+ if (yyin == stdin)
+ return 1;
+
+ fclose(yyin);
+ if (num_files) {
+ yyin = fopen(*file_list, "r");
+ if (yyin == NULL) {
+ cerr << "Can't open " << *file_list << endl;
+ return 1;
+ }
+ num_files--;
+ file_list++;
+ } else
+ yyin = stdin;
+ return 0;
}