X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/dfaa48602d4e6d329e3ae9063f44929490928b3d..06cb07d517e067fced1e6ca1ea8d432bc5a4d728:/src/scan-gram.l

diff --git a/src/scan-gram.l b/src/scan-gram.l
index 7a6d7bfe..52762508 100644
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,7 +1,6 @@
 /* Bison Grammar Scanner                             -*- C -*-
 
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-   Free Software Foundation, Inc.
+   Copyright (C) 2002-2010 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -37,6 +36,7 @@
 #include <src/reader.h>
 #include <src/uniqstr.h>
 
+#include <ctype.h>
 #include <mbswidth.h>
 #include <quote.h>
 
@@ -55,10 +55,16 @@ static boundary scanner_cursor;
 static size_t no_cr_read (FILE *, char *, size_t);
 #define YY_INPUT(buf, result, size) ((result) = no_cr_read (yyin, buf, size))
 
-#define RETURN_PERCENT_FLAG(Value)              \
+#define RETURN_PERCENT_PARAM(Value)                     \
+  RETURN_VALUE(PERCENT_PARAM, param, param_ ## Value)
+
+#define RETURN_PERCENT_FLAG(Value)                              \
+  RETURN_VALUE(PERCENT_FLAG, uniqstr, uniqstr_new (Value))
+
+#define RETURN_VALUE(Token, Field, Value)       \
   do {                                          \
-    val->uniqstr = uniqstr_new (Value);         \
-    return PERCENT_FLAG;                        \
+    val->Field = Value;                         \
+    return Token;                               \
   } while (0)
 
 #define ROLLBACK_CURRENT_TOKEN                                  \
@@ -203,7 +209,7 @@ splice	 (\\[ \f\t\v]*\n)*
   "%glr-parser"                     return PERCENT_GLR_PARSER;
   "%language"                       return PERCENT_LANGUAGE;
   "%left"                           return PERCENT_LEFT;
-  "%lex-param"                      return PERCENT_LEX_PARAM;
+  "%lex-param"                      RETURN_PERCENT_PARAM(lex);
   "%locations"                      RETURN_PERCENT_FLAG("locations");
   "%merge"                          return PERCENT_MERGE;
   "%name"[-_]"prefix"               return PERCENT_NAME_PREFIX;
@@ -213,7 +219,8 @@ splice	 (\\[ \f\t\v]*\n)*
   "%nondeterministic-parser"        return PERCENT_NONDETERMINISTIC_PARSER;
   "%nterm"                          return PERCENT_NTERM;
   "%output"                         return PERCENT_OUTPUT;
-  "%parse-param"                    return PERCENT_PARSE_PARAM;
+  "%param"                          RETURN_PERCENT_PARAM(both);
+  "%parse-param"                    RETURN_PERCENT_PARAM(parse);
   "%prec"                           return PERCENT_PREC;
   "%precedence"                     return PERCENT_PRECEDENCE;
   "%printer"                        return PERCENT_PRINTER;
@@ -578,10 +585,9 @@ splice	 (\\[ \f\t\v]*\n)*
 {
   \\[0-7]{1,3} {
     unsigned long int c = strtoul (yytext + 1, NULL, 8);
-    if (UCHAR_MAX < c)
-      complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext));
-    else if (! c)
-      complain_at (*loc, _("invalid null character: %s"), quote (yytext));
+    if (!c || UCHAR_MAX < c)
+      complain_at (*loc, _("invalid number after \\-escape: %s"),
+                   yytext+1);
     else
       obstack_1grow (&obstack_for_string, c);
   }
@@ -589,10 +595,9 @@ splice	 (\\[ \f\t\v]*\n)*
   \\x[0-9abcdefABCDEF]+ {
     verify (UCHAR_MAX < ULONG_MAX);
     unsigned long int c = strtoul (yytext + 2, NULL, 16);
-    if (UCHAR_MAX < c)
-      complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext));
-    else if (! c)
-      complain_at (*loc, _("invalid null character: %s"), quote (yytext));
+    if (!c || UCHAR_MAX < c)
+      complain_at (*loc, _("invalid number after \\-escape: %s"),
+                   yytext+1);
     else
       obstack_1grow (&obstack_for_string, c);
   }
@@ -610,16 +615,20 @@ splice	 (\\[ \f\t\v]*\n)*
 
   \\(u|U[0-9abcdefABCDEF]{4})[0-9abcdefABCDEF]{4} {
     int c = convert_ucn_to_byte (yytext);
-    if (c < 0)
-      complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext));
-    else if (! c)
-      complain_at (*loc, _("invalid null character: %s"), quote (yytext));
+    if (c <= 0)
+      complain_at (*loc, _("invalid number after \\-escape: %s"),
+                   yytext+1);
     else
       obstack_1grow (&obstack_for_string, c);
   }
   \\(.|\n)	{
-    complain_at (*loc, _("unrecognized escape sequence: %s"), quote (yytext));
-    STRING_GROW;
+    char const *p = yytext + 1;
+    /* Quote only if escaping won't make the character visible.  */
+    if (isspace ((unsigned char) *p) && isprint ((unsigned char) *p))
+      p = quote (p);
+    else
+      p = quotearg_style_mem (escape_quoting_style, p, 1);
+    complain_at (*loc, _("invalid character after \\-escape: %s"), p);
   }
 }