gecko-dev/js/js2/lexutils.h

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