From 435a104dd5bc12c19e65001f2e8540eb30f1c4eb Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Tue, 25 Mar 2014 05:26:09 +0800
Subject: lexical bugs

---
 cibic.l |  5 +++--
 main.c  | 16 ++++++++++++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/cibic.l b/cibic.l
index 26fca1f..cd9b6eb 100644
--- a/cibic.l
+++ b/cibic.l
@@ -64,12 +64,12 @@ digit [0-9]
     return INT_CONST; 
 }
 
-'([^\'\\]|\\.)'                                  { 
+'([^\'\\]|\\.|\\[0-7][0-7]?[0-7]?|\\[xX][0-9a-fA-F]+)' { 
     yylval.strval = strdup(yytext);
     return CHAR_CONST; 
 }
 
-\"[^\n\"]*\"                                {
+\"[^\n\"]*\" {
     yylval.strval = strndup(yytext + 1, strlen(yytext) - 2);
     return STR_CONST; 
 }
@@ -79,6 +79,7 @@ digit [0-9]
 "=="                                        { return OPT_EQ; }
 "!="                                        { return OPT_NE; }
 "<="                                        { return OPT_LE; }
+">="                                        { return OPT_GE; }
 "<<"                                        { return OPT_SHL; }
 ">>"                                        { return OPT_SHR; }
 "++"                                        { return OPT_INC; }
diff --git a/main.c b/main.c
index 181dde2..463d290 100644
--- a/main.c
+++ b/main.c
@@ -5,6 +5,7 @@
 
 extern int yyparse();
 extern FILE *yyin;
+char *fname;
 
 int yywrap() {
     return 1;
@@ -15,10 +16,17 @@ int yyerror(char *s) {
 
 void print_ast() {
     yyparse();
+    if (fname)
+        printf("AST for file: \"%s\"\n", fname);
+    else
+        printf("AST for stdin\n");
+
     if (ast_root)
+    {
         cnode_debug_print(ast_root, 1);
+    }
     else
-        fprintf(stderr, "Syntax Error\n");
+        fprintf(stdout, "Syntax Error\n");
 }
 
 void print_help() {
@@ -51,7 +59,8 @@ int main(int argc, char **argv) {
     }
     if (optind == argc - 1)
     {
-        yyin = fopen(argv[argc - 1], "r");
+        fname = argv[argc - 1];
+        yyin = fopen(fname, "r");
         if (!yyin)
         {
             fprintf(stderr, "Error while opening file.");
@@ -59,7 +68,10 @@ int main(int argc, char **argv) {
         }
     }
     else if (optind == argc)
+    {
+        fname = NULL;
         yyin = stdin;
+    }
     else
     {
         fprintf(stderr, "Only one source file is exepected.\n");
-- 
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