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Support UTF-8 identifiers in C/C++ expressions (PR gdb/22973)

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Factor out cp_ident_is_alpha/cp_ident_is_alnum out of
gdb/cp-name-parser.y and use it in the C/C++ expression parser too.

New test included.

gdb/ChangeLog:
2018-05-22  Pedro Alves  <palves@redhat.com>
	    張俊芝  <zjz@zjz.name>

	PR gdb/22973
	* c-exp.y: Include "c-support.h".
	(parse_number, c_parse_escape, lex_one_token): Use TOLOWER instead
	of tolower.  Use c_ident_is_alpha to scan names.
	* c-lang.c: Include "c-support.h".
	(convert_ucn, convert_octal, convert_hex, convert_escape): Use
	ISXDIGIT instead of isxdigit and ISDIGIT instead of isdigit.
	* c-support.h: New file, with bits factored out from ...
	* cp-name-parser.y: ... this file.
	Include "c-support.h".
	(cp_ident_is_alpha, cp_ident_is_alnum): Deleted, moved to
	c-support.h and renamed.
	(symbol_end, yylex): Adjust.

gdb/testsuite/ChangeLog:
2018-05-22  Pedro Alves  <palves@redhat.com>

	PR gdb/22973
	* gdb.base/utf8-identifiers.c: New file.
	* gdb.base/utf8-identifiers.exp: New file.
This commit is contained in:
Pedro Alves
2018-05-22 17:35:38 +01:00
parent 0ec848ad25
commit b1b60145ae
8 changed files with 240 additions and 44 deletions
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46
gdb/c-support.h Normal file
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/* Helper routines for C support in GDB.
Copyright (C) 2017-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef C_SUPPORT_H
#define C_SUPPORT_H
#include "safe-ctype.h"
/* Like ISALPHA, but also returns true for the union of all UTF-8
multi-byte sequence bytes and non-ASCII characters in
extended-ASCII charsets (e.g., Latin1). I.e., returns true if the
high bit is set. Note that not all UTF-8 ranges are allowed in C++
identifiers, but we don't need to be pedantic so for simplicity we
ignore that here. Plus this avoids the complication of actually
knowing what was the right encoding. */
static inline bool
c_ident_is_alpha (unsigned char ch)
{
return ISALPHA (ch) || ch >= 0x80;
}
/* Similarly, but Like ISALNUM. */
static inline bool
c_ident_is_alnum (unsigned char ch)
{
return ISALNUM (ch) || ch >= 0x80;
}
#endif /* C_SUPPORT_H */