1 files changed, 102 insertions, 0 deletions
diff --git a/tests/include_by_buffer.direct.l b/tests/include_by_buffer.direct.l
new file mode 100644
index 0000000..f3b2d2a
--- /dev/null
+++ b/tests/include_by_buffer.direct.l
@@ -0,0 +1,102 @@
+/*
+ * This file is part of flex.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+f * 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.
+ * 
+ * Neither the name of the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+%{
+/* A scanner file to build "scanner.c".
+   Input language is any text.
+   "#include <filename>" causes a buffer switch.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include "config.h"
+%}
+
+%option 8bit prefix="test"
+%option nounput nomain noyywrap noinput
+%option warn
+
+%x GET_FILENAME
+%{
+
+#define MAX_INCLUDE_DEPTH 10
+YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
+int include_stack_ptr = 0;
+%}
+%%
+
+<INITIAL>{
+^"#include"[[:blank:]]+"<"  { BEGIN(GET_FILENAME); }
+.|\n      { ECHO; }
+}
+
+<GET_FILENAME>{
+[[:alnum:]_.-]+>  {
+     /* recurse */
+    yytext[yyleng-1]='\0';
+    include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
+    if((yyin=fopen(yytext,"r"))==NULL) {
+        fprintf(stderr,"*** Error: Could not open include file \"%s\".\n",yytext);
+        yyterminate();
+    }
+    yy_switch_to_buffer( yy_create_buffer( yyin, YY_BUF_SIZE ));
+    BEGIN(0);
+    }
+.|\n  {
+    fprintf(stderr,"Invalid input \"%s\".\n", yytext);
+    yyterminate();
+   }
+}
+
+<<EOF>> {
+       if ( --include_stack_ptr < 0 ) {
+           yyterminate();
+       }
+       else {
+            fclose(yyin);
+           yy_delete_buffer( YY_CURRENT_BUFFER );
+           yy_switch_to_buffer( include_stack[include_stack_ptr] );
+       }
+   }
+
+%%
+
+int main(int argc, char** argv);
+
+int
+main ( int argc, char** argv )
+{
+    FILE * fp;
+    if( argc != 2 ) {
+        fprintf(stderr,"*** Error: Must specify one filename.\n");
+        exit(-1);
+    }
+    if((fp=fopen(argv[1],"r"))==NULL) {
+        fprintf(stderr,"*** Error: fopen(%s) failed.\n",argv[1]);
+        exit(-1);
+    }
+    yyin = fp;
+    yyout = stdout;
+    yylex();
+    printf("TEST RETURNING OK.\n");
+    return 0;
+}