c-lex.c (lex_string): Let cpp_parse_escape handles truncation and sign-extension.

	* c-lex.c (lex_string): Let cpp_parse_escape handles truncation
	and sign-extension.
	(lex_charconst): Update for change in prototype of
	cpp_interpret_charconst.  Extend from cppchar_t to HOST_WIDE_INT
	appropriately.
	* cpphash.h (BITS_PER_CPPCHAR_T): New.
	* cppinit.c (cpp_create_reader): Initialize them for no
	change in semantics.
	(cpp_post_options): Add sanity checks.
	* cpplex.c (cpp_parse_escape): Handle precision, sign-extension
	and truncation issues.  Calculate in type cppchar_t.
	(MAX_CHAR_TYPE_SIZE, MAX_WCHAR_TYPE_SIZE): Remove.
	(cpp_interpret_charconst): Calculate in type cppchar_t.  Handle
	run-time dependent precision correctly.  Return whether the
	result is signed or not.
	* cpplib.c (dequote_string): Use cppchar_t; update.
	* cpplib.h (cppchar_signed_t): New.
	struct cpp_options): New precision members.
	(cpp_interpret_charconst, cpp_parse_escape): Update prototypes.

From-SVN: r53152

1 files changed, 2 insertions, 10 deletions

diff --git a/gcc/cpplib.c b/gcc/cpplib.c
index b210209..c90224c 100644
--- a/gcc/cpplib.c
+++ b/gcc/cpplib.c
@@ -726,23 +726,15 @@ dequote_string (pfile, str, len)
   uchar *result = _cpp_unaligned_alloc (pfile, len + 1);
   uchar *dst = result;
   const uchar *limit = str + len;
-  unsigned int c;
-  unsigned HOST_WIDE_INT mask;
+  cppchar_t c;
 
-  /* We need the mask to match the host's 'unsigned char', not the
-     target's.  */
-  if (CHAR_BIT < HOST_BITS_PER_WIDE_INT)
-    mask = ((unsigned HOST_WIDE_INT) 1 << CHAR_BIT) - 1;
-  else
-    mask = ~(unsigned HOST_WIDE_INT)0;
-  
   while (str < limit)
     {
       c = *str++;
       if (c != '\\')
 	*dst++ = c;
       else
-	*dst++ = cpp_parse_escape (pfile, (const uchar **)&str, limit, mask);
+	*dst++ = cpp_parse_escape (pfile, &str, limit, 0);
     }
   *dst++ = '\0';
   return result;