зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
3.7 KiB
C++
108 строки
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the JavaScript 2 Prototype.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#ifndef lexutils_h___
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#define lexutils_h___
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#include <string>
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#include <iterator>
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#include "utilities.h"
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#include "exception.h"
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#include "vmtypes.h"
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#include "jstypes.h"
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namespace JavaScript {
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namespace LexUtils {
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#define IS_ALPHA(ch) ((ch >= 'a' && ch <= 'z') || \
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(ch >= 'A' && ch <= 'Z') || \
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(ch == '_'))
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#define IS_NUMBER(ch) (ch >= '0' && ch <= '9')
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enum TokenEstimation {
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/* guess at tokentype, based on first character of token */
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teAlpha,
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teCloseParen,
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teComma,
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teColon,
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teEOF,
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teIllegal,
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teLessThan,
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teMinus,
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teNewline,
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teNumeric,
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teOpenParen,
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tePlus,
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teString,
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teUnknown,
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};
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struct TokenLocation {
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TokenLocation () : begin(0), estimate(teIllegal) {}
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string8_citer begin;
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TokenEstimation estimate;
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};
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/* compare, ignoring case */
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int cmp_nocase (const string8& s1, string8_citer s2_begin,
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string8_citer s2_end);
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/* locate the beginning of the next token and take a guess at what it
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* might be */
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TokenLocation seekTokenStart (string8_citer begin, string8_citer end);
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/* general purpose lexer functions; |begin| is expected to point
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* at the start of the token to be processed (eg, these routines
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* don't call |seekTokenStart|, and no initial check is done to ensure
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* that |begin| != |end|.
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*/
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string8_citer lexAlpha (string8_citer begin, string8_citer end,
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string8 **rval);
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string8_citer lexBool (string8_citer begin, string8_citer end, bool *rval);
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string8_citer lexDouble (string8_citer begin, string8_citer end,
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double *rval);
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string8_citer lexInt32 (string8_citer begin, string8_citer end,
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int32 *rval);
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string8_citer lexRegister (string8_citer begin, string8_citer end,
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JSTypes::Register *rval);
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string8_citer lexString8 (string8_citer begin, string8_citer end,
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string8 **rval);
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string8_citer lexUInt32 (string8_citer begin, string8_citer end,
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uint32 *rval);
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}
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}
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#endif /* lexutils_h___ */
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