Upgrade to version 2.5.4 of flex.

Inspired by: NetBSD/OpenBSD (I can't remember who I saw do it
             first, so I'll give them both some inspiration
             points. :)

1 files changed, 31 insertions, 21 deletions

diff --git a/usr.bin/lex/flex.skl b/usr.bin/lex/flex.skl
index 67ebe57..8dee386 100644
--- a/usr.bin/lex/flex.skl
+++ b/usr.bin/lex/flex.skl
@@ -1,7 +1,7 @@
 /* A lexical scanner generated by flex */
 
 /* Scanner skeleton version:
- * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.89 96/05/25 21:02:21 vern Exp $
+ * $Header: /home/ncvs/src/usr.bin/lex/flex.skl,v 1.1.1.2 1996/06/19 20:26:06 nate Exp $
  */
 
 #define FLEX_SCANNER
@@ -250,7 +250,7 @@ void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b ));
 #define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer )
 
 YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size ));
-YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *str ));
+YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *yy_str ));
 YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len ));
 %*
 
@@ -783,7 +783,7 @@ int yyFlexLexer::yy_get_next_buffer()
 		/* don't do the read, it's not guaranteed to return an EOF,
 		 * just force an EOF
 		 */
-		yy_n_chars = 0;
+		yy_current_buffer->yy_n_chars = yy_n_chars = 0;
 
 	else
 		{
@@ -838,6 +838,8 @@ int yyFlexLexer::yy_get_next_buffer()
 		/* Read in more data. */
 		YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]),
 			yy_n_chars, num_to_read );
+
+		yy_current_buffer->yy_n_chars = yy_n_chars;
 		}
 
 	if ( yy_n_chars == 0 )
@@ -947,7 +949,8 @@ void yyFlexLexer::yyunput( int c, register char* yy_bp )
 
 		yy_cp += (int) (dest - source);
 		yy_bp += (int) (dest - source);
-		yy_n_chars = yy_current_buffer->yy_buf_size;
+		yy_current_buffer->yy_n_chars =
+			yy_n_chars = yy_current_buffer->yy_buf_size;
 
 		if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
 			YY_FATAL_ERROR( "flex scanner push-back overflow" );
@@ -997,13 +1000,26 @@ int yyFlexLexer::yyinput()
 
 			switch ( yy_get_next_buffer() )
 				{
+				case EOB_ACT_LAST_MATCH:
+					/* This happens because yy_g_n_b()
+					 * sees that we've accumulated a
+					 * token and flags that we need to
+					 * try matching the token before
+					 * proceeding.  But for input(),
+					 * there's no matching to consider.
+					 * So convert the EOB_ACT_LAST_MATCH
+					 * to EOB_ACT_END_OF_FILE.
+					 */
+
+					/* Reset buffer status. */
+					yyrestart( yyin );
+
+					/* fall through */
+
 				case EOB_ACT_END_OF_FILE:
 					{
 					if ( yywrap() )
-						{
-						yy_c_buf_p = yytext_ptr + offset;
 						return EOF;
-						}
 
 					if ( ! yy_did_buffer_switch_on_eof )
 						YY_NEW_FILE;
@@ -1017,15 +1033,6 @@ int yyFlexLexer::yyinput()
 				case EOB_ACT_CONTINUE_SCAN:
 					yy_c_buf_p = yytext_ptr + offset;
 					break;
-
-				case EOB_ACT_LAST_MATCH:
-#ifdef __cplusplus
-					YY_FATAL_ERROR(
-					"unexpected last match in yyinput()" );
-#else
-					YY_FATAL_ERROR(
-					"unexpected last match in input()" );
-#endif
 				}
 			}
 		}
@@ -1223,6 +1230,9 @@ YY_BUFFER_STATE b;
 void yyFlexLexer::yy_flush_buffer( YY_BUFFER_STATE b )
 %*
 	{
+	if ( ! b )
+		return;
+
 	b->yy_n_chars = 0;
 
 	/* We always need two end-of-buffer characters.  The first causes
@@ -1286,17 +1296,17 @@ yy_size_t size;
 #ifndef YY_NO_SCAN_STRING
 %-
 #ifdef YY_USE_PROTOS
-YY_BUFFER_STATE yy_scan_string( yyconst char *str )
+YY_BUFFER_STATE yy_scan_string( yyconst char *yy_str )
 #else
-YY_BUFFER_STATE yy_scan_string( str )
-yyconst char *str;
+YY_BUFFER_STATE yy_scan_string( yy_str )
+yyconst char *yy_str;
 #endif
 	{
 	int len;
-	for ( len = 0; str[len]; ++len )
+	for ( len = 0; yy_str[len]; ++len )
 		;
 
-	return yy_scan_bytes( str, len );
+	return yy_scan_bytes( yy_str, len );
 	}
 %*
 #endif