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| author | Joseph Myers <joseph@codesourcery.com> | 2010-01-01 18:08:17 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2010-01-01 18:08:17 +0000 |
| commit | dadab4fd220ff852e68afdd855a5702d3eb22447 (patch) | |
| tree | 4377e3cf62ac8d551491136201deeb693025608f /libcpp/expr.c | |
| parent | e4a95933a61da64ab7b32186baa2c62312c1f623 (diff) | |
| download | gcc-dadab4fd220ff852e68afdd855a5702d3eb22447.zip gcc-dadab4fd220ff852e68afdd855a5702d3eb22447.tar.gz gcc-dadab4fd220ff852e68afdd855a5702d3eb22447.tar.bz2 | |
re PR preprocessor/41947 (GCC Hexadecimal Floating point constant handling)
libcpp:
PR preprocessor/41947
* expr.c (cpp_classify_number): Give error for hexadecimal
floating-point constant with no digits before or after point.
gcc/testsuite:
* gcc.dg/c99-hexfloat-3.c: New test.
From-SVN: r155558
Diffstat (limited to 'libcpp/expr.c')
| -rw-r--r-- | libcpp/expr.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/libcpp/expr.c b/libcpp/expr.c index 96dd2fd..60cb281 100644 --- a/libcpp/expr.c +++ b/libcpp/expr.c @@ -1,6 +1,6 @@ /* Parse C expressions for cpplib. Copyright (C) 1987, 1992, 1994, 1995, 1997, 1998, 1999, 2000, 2001, - 2002, 2004, 2008, 2009 Free Software Foundation. + 2002, 2004, 2008, 2009, 2010 Free Software Foundation. Contributed by Per Bothner, 1994. This program is free software; you can redistribute it and/or modify it @@ -229,6 +229,7 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) const uchar *limit; unsigned int max_digit, result, radix; enum {NOT_FLOAT = 0, AFTER_POINT, AFTER_EXPON} float_flag; + bool seen_digit; /* If the lexer has done its job, length one can only be a single digit. Fast-path this very common case. */ @@ -239,6 +240,7 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) float_flag = NOT_FLOAT; max_digit = 0; radix = 10; + seen_digit = false; /* First, interpret the radix. */ if (*str == '0') @@ -267,6 +269,7 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) if (ISDIGIT (c) || (ISXDIGIT (c) && radix == 16)) { + seen_digit = true; c = hex_value (c); if (c > max_digit) max_digit = c; @@ -332,6 +335,9 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) return CPP_N_INVALID; } + if (radix == 16 && !seen_digit) + SYNTAX_ERROR ("no digits in hexadecimal floating constant"); + if (radix == 16 && CPP_PEDANTIC (pfile) && !CPP_OPTION (pfile, c99)) cpp_error (pfile, CPP_DL_PEDWARN, "use of C99 hexadecimal floating constant"); |