===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/parse/lex.c,v
retrieving revision 1.5
retrieving revision 1.14
diff -u -p -r1.5 -r1.14
--- OpenXM_contrib2/asir2000/parse/lex.c	2000/08/22 05:04:27	1.5
+++ OpenXM_contrib2/asir2000/parse/lex.c	2001/03/08 07:49:13	1.14
@@ -45,18 +45,20 @@
  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
  *
- * $OpenXM: OpenXM_contrib2/asir2000/parse/lex.c,v 1.4 2000/08/21 08:31:47 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/parse/lex.c,v 1.13 2000/12/26 05:17:47 noro Exp $ 
 */
 #include <ctype.h>
 #include "ca.h"
 #include "al.h"
 #include "base.h"
 #include "parse.h"
-#if !defined(THINK_C)
 #include <sys/types.h>
 #include <sys/stat.h>
-#endif
+#if defined(VISUAL)
+#include "ytab.h"
+#else
 #include "y.tab.h"
+#endif
 
 extern IN asir_infile;
 extern struct oTKWD kwd[];
@@ -67,6 +69,7 @@ int aftercomment();
 
 extern int main_parser;
 extern char *parse_strp;
+extern int recv_intr;
 
 static int skipspace();
 static int Getc();
@@ -399,12 +402,28 @@ yylex()
 		return ( c );
 }
 
+void purge_stdin()
+{
+#if defined(__FreeBSD__)
+	fpurge(stdin);
+#elif defined(linux)
+	stdin->_IO_read_end = stdin->_IO_read_base;
+	stdin->_IO_read_ptr = stdin->_IO_read_base;
+#elif defined(VISUAL_LIB)
+	w_purge_stdin();
+#elif defined(sparc) || defined(__alpha) || defined(__SVR4) || defined(mips) || defined(VISUAL)
+	stdin->_ptr = stdin->_base; stdin->_cnt = 0;
+#else
+--->FIXIT
+#endif
+}
+
 static int skipspace() {
 	int c,c1;
 
 	for ( c = Getc(); ; )
 		switch ( c ) {
-			case ' ': case '\t':
+			case ' ': case '\t': case '\r':
 				c = Getc(); break;
 			case '\n':
 				c = afternl();	break;
@@ -504,7 +523,24 @@ FILE *fp;
 	int c;
 
 	if ( fp ) {
-		c = getc(fp);
+#if FEP
+		if ( do_fep && isatty(fileno(fp)) )
+			c = readline_getc();
+		else
+#endif
+			c = getc(fp);
+#if defined(VISUAL)
+		if ( recv_intr ) {
+#include <signal.h>
+			if ( recv_intr == 1 ) {
+				recv_intr = 0;
+				int_handler(SIGINT);
+			} else {
+				recv_intr = 0;
+				ox_usr1_handler(0);
+			}
+		}
+#endif
 		if ( c == EOF )
 			return c;
 		if ( asir_infile->encoded )
@@ -528,7 +564,12 @@ FILE *fp;
 	if ( fp ) {
 		if ( asir_infile->encoded )
 			c = (int)encrypt_char((unsigned char)c);
-		ungetc(c,fp);
+#if FEP
+		if ( do_fep && isatty(fileno(fp)) )
+			readline_ungetc();
+		else
+#endif
+			ungetc(c,fp);
 	} else
 		*--parse_strp = c;
 }
@@ -541,7 +582,11 @@ static int Getc() {
 			if ((c = Egetc(asir_infile->fp)) == EOF)
 				if ( NEXT(asir_infile) ) {
 					closecurrentinput();
-					c = Getc();
+					/* if the input is the top level, generate error */
+					if ( !NEXT(asir_infile) )
+						error("end-of-file detected during parsing");
+					else
+						c = Getc();
 					break;
 				} else if ( read_exec_file || do_file )
 					asir_terminate(2);
@@ -577,3 +622,58 @@ char *s;
 		*s++ = c;
 	*s = 0;
 }
+
+#if FEP
+
+static char *readline_line;
+static int readline_nc,readline_index;
+char *readline_console();
+
+int readline_getc()
+{
+        char buf[BUFSIZ];
+
+        if ( !readline_nc ) {
+                if ( readline_line )
+                        free(readline_line);
+                sprompt(buf);
+                readline_line = readline_console(buf);
+                readline_nc = strlen(readline_line);
+                readline_index = 0;
+        }
+        readline_nc--;
+        return readline_line[readline_index++];
+}
+
+void readline_ungetc()
+{
+        readline_nc++; readline_index--;
+}
+
+char *readline_console(prompt)
+char *prompt;
+{
+        char *line;
+        int exp_result;
+        char *expansion;
+
+        while ( 1 ) {
+                line = (char *)readline(prompt);
+                if ( line && *line ) {
+                        using_history();
+                        exp_result = history_expand(line,&expansion);
+                        if ( !exp_result ) {
+                                free(expansion);
+                                for ( ; isspace(*line); line++ );
+                                add_history(line);
+                                break;
+                        } else if ( exp_result > 0 ) {
+                                free(line);
+                                line = expansion;
+                                break;
+                        }
+                }
+        }
+        return line;
+}
+#endif