summaryrefslogtreecommitdiffstats
path: root/third_party/heimdal/lib/sl/slc-lex.l
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/heimdal/lib/sl/slc-lex.l')
-rw-r--r--third_party/heimdal/lib/sl/slc-lex.l158
1 files changed, 158 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/sl/slc-lex.l b/third_party/heimdal/lib/sl/slc-lex.l
new file mode 100644
index 0000000..3a37302
--- /dev/null
+++ b/third_party/heimdal/lib/sl/slc-lex.l
@@ -0,0 +1,158 @@
+%{
+/*
+ * Copyright (c) 2004 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $Id$ */
+
+#undef ECHO
+
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include "slc.h"
+#include "slc-gram.h"
+unsigned lineno = 1;
+
+static void handle_comment(void);
+static char * handle_string(void);
+
+#define YY_NO_UNPUT
+
+#undef ECHO
+
+%}
+
+%%
+[A-Za-z][-A-Za-z0-9_]* {
+ yylval.string = strdup ((const char *)yytext);
+ return LITERAL;
+ }
+"\"" { yylval.string = handle_string(); return STRING; }
+\n { ++lineno; }
+\/\* { handle_comment(); }
+[={}] { return *yytext; }
+[ \t] ;
+%%
+
+void
+error_message (const char *format, ...)
+{
+ va_list args;
+
+ va_start (args, format);
+ fprintf (stderr, "%s:%d: ", filename, lineno);
+ vfprintf (stderr, format, args);
+ va_end (args);
+ error_flag++;
+}
+
+void
+yyerror (const char *s)
+{
+ error_message("%s\n", s);
+}
+
+static void
+handle_comment(void)
+{
+ int c;
+ int start_lineno = lineno;
+ int level = 1;
+ int seen_star = 0;
+ int seen_slash = 0;
+ while((c = input()) != EOF) {
+ if(c == '/') {
+ if(seen_star) {
+ if(--level == 0)
+ return;
+ seen_star = 0;
+ continue;
+ }
+ seen_slash = 1;
+ continue;
+ } else if(c == '*') {
+ if(seen_slash) {
+ level++;
+ seen_star = seen_slash = 0;
+ continue;
+ }
+ seen_star = 1;
+ continue;
+ }
+ seen_star = seen_slash = 0;
+ if(c == '\n') {
+ lineno++;
+ continue;
+ }
+ }
+ if(c == EOF)
+ error_message("unterminated comment, possibly started on line %d\n", start_lineno);
+}
+
+static char *
+handle_string(void)
+{
+ char x[1024];
+ int i = 0;
+ int c;
+ int quote = 0;
+ while((c = input()) != EOF){
+ if(quote) {
+ x[i++] = '\\';
+ x[i++] = c;
+ quote = 0;
+ continue;
+ }
+ if(c == '\n'){
+ error_message("unterminated string");
+ lineno++;
+ break;
+ }
+ if(c == '\\'){
+ quote++;
+ continue;
+ }
+ if(c == '\"')
+ break;
+ x[i++] = c;
+ }
+ x[i] = '\0';
+ return strdup(x);
+}
+
+int
+yywrap ()
+{
+ return 1;
+}