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re PR preprocessor/30001 (out-of-bounds access when processing empty file)

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PR preprocessor/30001:
	* charset.c (_cpp_convert_input): Check that to.len is greater
	than zero.

From-SVN: r120245
This commit is contained in:
Tom Tromey 2006-12-28 18:45:48 +00:00 committed by Tom Tromey
parent c5bfb0451d
commit 30b0edc057
2 changed files with 8 additions and 2 deletions
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6
libcpp/ChangeLog
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@ -1,3 +1,9 @@
2006-12-28 Tom Tromey <tromey@redhat.com>
PR preprocessor/30001:
* charset.c (_cpp_convert_input): Check that to.len is greater
than zero.
2006-11-20 Trevor Smigiel <Trevor_Smigiel@playstation.sony.com>
* configure.ac (need_64bit_hwint): Need 64bit hwint for SPU.

4
libcpp/charset.c
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@ -1,5 +1,5 @@
/* CPP Library - charsets
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
Free Software Foundation, Inc.
Broken out of c-lex.c Apr 2003, adding valid C99 UCN ranges.
@ -1628,7 +1628,7 @@ _cpp_convert_input (cpp_reader *pfile, const char *input_charset,
terminate with another \r, not an \n, so that we do not mistake
the \r\n sequence for a single DOS line ending and erroneously
issue the "No newline at end of file" diagnostic. */
if (to.text[to.len - 1] == '\r')
if (to.len && to.text[to.len - 1] == '\r')
to.text[to.len] = '\r';
else
to.text[to.len] = '\n';