Code Coverage for jsscan.c

1		/* -- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 --
2		* vim: set sw=4 ts=8 et tw=78:
3		*
4		* *** BEGIN LICENSE BLOCK ***
5		* Version: MPL 1.1/GPL 2.0/LGPL 2.1
6		*
7		* The contents of this file are subject to the Mozilla Public License Version
8		* 1.1 (the "License"); you may not use this file except in compliance with
9		* the License. You may obtain a copy of the License at
10		* http://www.mozilla.org/MPL/
11		*
12		* Software distributed under the License is distributed on an "AS IS" basis,
13		* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14		* for the specific language governing rights and limitations under the
15		* License.
16		*
17		* The Original Code is Mozilla Communicator client code, released
18		* March 31, 1998.
19		*
20		* The Initial Developer of the Original Code is
21		* Netscape Communications Corporation.
22		* Portions created by the Initial Developer are Copyright (C) 1998
23		* the Initial Developer. All Rights Reserved.
24		*
25		* Contributor(s):
26		*
27		* Alternatively, the contents of this file may be used under the terms of
28		* either of the GNU General Public License Version 2 or later (the "GPL"),
29		* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30		* in which case the provisions of the GPL or the LGPL are applicable instead
31		* of those above. If you wish to allow use of your version of this file only
32		* under the terms of either the GPL or the LGPL, and not to allow others to
33		* use your version of this file under the terms of the MPL, indicate your
34		* decision by deleting the provisions above and replace them with the notice
35		* and other provisions required by the GPL or the LGPL. If you do not delete
36		* the provisions above, a recipient may use your version of this file under
37		* the terms of any one of the MPL, the GPL or the LGPL.
38		*
39		* *** END LICENSE BLOCK *** */
40
41		/*
42		* JS lexical scanner.
43		*/
44		#include "jsstddef.h"
45		#include <stdio.h> /* first to avoid trouble on some systems */
46		#include <errno.h>
47		#include <limits.h>
48		#include <math.h>
49		#ifdef HAVE_MEMORY_H
50		#include <memory.h>
51		#endif
52		#include <stdarg.h>
53		#include <stdlib.h>
54		#include <string.h>
55		#include "jstypes.h"
56		#include "jsarena.h" /* Added by JSIFY */
57		#include "jsutil.h" /* Added by JSIFY */
58		#include "jsdtoa.h"
59		#include "jsprf.h"
60		#include "jsapi.h"
61		#include "jsatom.h"
62		#include "jscntxt.h"
63		#include "jsconfig.h"
64		#include "jsemit.h"
65		#include "jsexn.h"
66		#include "jsnum.h"
67		#include "jsopcode.h"
68		#include "jsregexp.h"
69		#include "jsscan.h"
70		#include "jsscript.h"
71
72		#if JS_HAS_XML_SUPPORT
73		#include "jsparse.h"
74		#include "jsxml.h"
75		#endif
76
77		#define RESERVE_JAVA_KEYWORDS
78		#define RESERVE_ECMA_KEYWORDS
79
80		#define MAX_KEYWORD_LENGTH 12
81
82		static struct keyword {
83		const char *name;
84		JSTokenType tokentype; /* JSTokenType */
85		JSOp op; /* JSOp */
86		JSVersion version; /* JSVersion */
87		} keywords[] = {
88		{"break", TOK_BREAK, JSOP_NOP, JSVERSION_DEFAULT},
89		{"case", TOK_CASE, JSOP_NOP, JSVERSION_DEFAULT},
90		{"continue", TOK_CONTINUE, JSOP_NOP, JSVERSION_DEFAULT},
91		{js_default_str, TOK_DEFAULT, JSOP_NOP, JSVERSION_DEFAULT},
92		{js_delete_str, TOK_DELETE, JSOP_NOP, JSVERSION_DEFAULT},
93		{"do", TOK_DO, JSOP_NOP, JSVERSION_DEFAULT},
94		{"else", TOK_ELSE, JSOP_NOP, JSVERSION_DEFAULT},
95		{"export", TOK_EXPORT, JSOP_NOP, JSVERSION_1_2},
96		{js_false_str, TOK_PRIMARY, JSOP_FALSE, JSVERSION_DEFAULT},
97		{"for", TOK_FOR, JSOP_NOP, JSVERSION_DEFAULT},
98		{js_function_str, TOK_FUNCTION, JSOP_NOP, JSVERSION_DEFAULT},
99		{"if", TOK_IF, JSOP_NOP, JSVERSION_DEFAULT},
100		{js_in_str, TOK_IN, JSOP_IN, JSVERSION_DEFAULT},
101		{js_new_str, TOK_NEW, JSOP_NEW, JSVERSION_DEFAULT},
102		{js_null_str, TOK_PRIMARY, JSOP_NULL, JSVERSION_DEFAULT},
103		{"return", TOK_RETURN, JSOP_NOP, JSVERSION_DEFAULT},
104		{"switch", TOK_SWITCH, JSOP_NOP, JSVERSION_DEFAULT},
105		{js_this_str, TOK_PRIMARY, JSOP_THIS, JSVERSION_DEFAULT},
106		{js_true_str, TOK_PRIMARY, JSOP_TRUE, JSVERSION_DEFAULT},
107		{js_typeof_str, TOK_UNARYOP, JSOP_TYPEOF,JSVERSION_DEFAULT},
108		{js_var_str, TOK_VAR, JSOP_DEFVAR,JSVERSION_DEFAULT},
109		{js_void_str, TOK_UNARYOP, JSOP_VOID, JSVERSION_DEFAULT},
110		{"while", TOK_WHILE, JSOP_NOP, JSVERSION_DEFAULT},
111		{"with", TOK_WITH, JSOP_NOP, JSVERSION_DEFAULT},
112
113		#if JS_HAS_CONST
114		{js_const_str, TOK_VAR, JSOP_DEFCONST,JSVERSION_DEFAULT},
115		#else
116		{js_const_str, TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
117		#endif
118
119		#if JS_HAS_EXCEPTIONS
120		{"try", TOK_TRY, JSOP_NOP, JSVERSION_DEFAULT},
121		{"catch", TOK_CATCH, JSOP_NOP, JSVERSION_DEFAULT},
122		{"finally", TOK_FINALLY, JSOP_NOP, JSVERSION_DEFAULT},
123		{"throw", TOK_THROW, JSOP_NOP, JSVERSION_DEFAULT},
124		#else
125		{"try", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
126		{"catch", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
127		{"finally", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
128		{"throw", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
129		#endif
130
131		#if JS_HAS_INSTANCEOF
132		{js_instanceof_str, TOK_INSTANCEOF, JSOP_INSTANCEOF,JSVERSION_1_4},
133		#else
134		{js_instanceof_str, TOK_RESERVED, JSOP_NOP, JSVERSION_1_4},
135		#endif
136
137		#ifdef RESERVE_JAVA_KEYWORDS
138		{"abstract", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
139		{"boolean", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
140		{"byte", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
141		{"char", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
142		{"class", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
143		{"double", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
144		{"extends", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
145		{"final", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
146		{"float", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
147		{"goto", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
148		{"implements", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
149		{"import", TOK_IMPORT, JSOP_NOP, JSVERSION_DEFAULT},
150		{"int", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
151		{"interface", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
152		{"long", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
153		{"native", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
154		{"package", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
155		{"private", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
156		{"protected", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
157		{"public", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
158		{"short", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
159		{"static", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
160		{"super", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
161		{"synchronized", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
162		{"throws", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
163		{"transient", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
164		{"volatile", TOK_RESERVED, JSOP_NOP, JSVERSION_DEFAULT},
165		#endif
166
167		#ifdef RESERVE_ECMA_KEYWORDS
168		{"enum", TOK_RESERVED, JSOP_NOP, JSVERSION_1_3},
169		#endif
170
171		#if JS_HAS_DEBUGGER_KEYWORD
172		{"debugger", TOK_DEBUGGER, JSOP_NOP, JSVERSION_1_3},
173		#elif defined(RESERVE_ECMA_KEYWORDS)
174		{"debugger", TOK_RESERVED, JSOP_NOP, JSVERSION_1_3},
175		#endif
176		{0, TOK_EOF, JSOP_NOP, JSVERSION_DEFAULT}
177		};
178
179		JSBool
180		js_InitScanner(JSContext *cx)
181	16	{
182	16	struct keyword *kw;
183	16	size_t length;
184	16	JSAtom *atom;
185
186	960	for (kw = keywords; kw->name; kw++) {
187	944	length = strlen(kw->name);
188	944	JS_ASSERT(length <= MAX_KEYWORD_LENGTH);
189	944	atom = js_Atomize(cx, kw->name, length, ATOM_PINNED);
190	944	if (!atom)
191	0	return JS_FALSE;
192	944	ATOM_SET_KEYWORD(atom, kw);
193		}
194	16	return JS_TRUE;
195		}
196
197		JS_FRIEND_API(void)
198		js_MapKeywords(void (mapfun)(const char ))
199	0	{
200	0	struct keyword *kw;
201
202	0	for (kw = keywords; kw->name; kw++)
203	0	mapfun(kw->name);
204		}
205
206		JSTokenStream *
207		js_NewTokenStream(JSContext cx, const jschar base, size_t length,
208		const char *filename, uintN lineno,
209		JSPrincipals *principals)
210	1207	{
211	1207	JSTokenStream *ts;
212
213	1207	ts = js_NewBufferTokenStream(cx, base, length);
214	1207	if (!ts)
215	0	return NULL;
216	1207	ts->filename = filename;
217	1207	ts->lineno = lineno;
218	1207	if (principals)
219	0	JSPRINCIPALS_HOLD(cx, principals);
220	1207	ts->principals = principals;
221	1207	return ts;
222		}
223
224		#define TBMIN 64
225
226		static JSBool
227		GrowTokenBuf(JSStringBuffer *sb, size_t newlength)
228	5056	{
229	5056	JSContext *cx;
230	5056	jschar *base;
231	5056	ptrdiff_t offset, length;
232	5056	size_t tbsize;
233	5056	JSArenaPool *pool;
234
235	5056	cx = sb->data;
236	5056	base = sb->base;
237	5056	offset = PTRDIFF(sb->ptr, base, jschar);
238	5056	pool = &cx->tempPool;
239	5056	if (!base) {
240	1207	tbsize = TBMIN * sizeof(jschar);
241	1207	length = TBMIN - 1;
242	1207	JS_ARENA_ALLOCATE_CAST(base, jschar *, pool, tbsize);
243		} else {
244	3849	length = PTRDIFF(sb->limit, base, jschar);
245	3849	tbsize = (length + 1) * sizeof(jschar);
246	3849	length += length + 1;
247	3849	JS_ARENA_GROW_CAST(base, jschar *, pool, tbsize, tbsize);
248		}
249	5056	if (!base) {
250	0	JS_ReportOutOfMemory(cx);
251	0	sb->base = STRING_BUFFER_ERROR_BASE;
252	0	return JS_FALSE;
253		}
254	5056	sb->base = base;
255	5056	sb->limit = base + length;
256	5056	sb->ptr = base + offset;
257	5056	return JS_TRUE;
258		}
259
260		JS_FRIEND_API(JSTokenStream *)
261		js_NewBufferTokenStream(JSContext cx, const jschar base, size_t length)
262	1207	{
263	1207	size_t nb;
264	1207	JSTokenStream *ts;
265
266	1207	nb = sizeof(JSTokenStream) + JS_LINE_LIMIT * sizeof(jschar);
267	1207	JS_ARENA_ALLOCATE_CAST(ts, JSTokenStream *, &cx->tempPool, nb);
268	1207	if (!ts) {
269	0	JS_ReportOutOfMemory(cx);
270	0	return NULL;
271		}
272	1207	memset(ts, 0, nb);
273	1207	ts->lineno = 1;
274	1207	ts->linebuf.base = ts->linebuf.limit = ts->linebuf.ptr = (jschar *)(ts + 1);
275	1207	ts->userbuf.base = (jschar *)base;
276	1207	ts->userbuf.limit = (jschar *)base + length;
277	1207	ts->userbuf.ptr = (jschar *)base;
278	1207	ts->tokenbuf.grow = GrowTokenBuf;
279	1207	ts->tokenbuf.data = cx;
280	1207	ts->listener = cx->runtime->sourceHandler;
281	1207	ts->listenerData = cx->runtime->sourceHandlerData;
282	1207	return ts;
283		}
284
285		JS_FRIEND_API(JSTokenStream *)
286		js_NewFileTokenStream(JSContext cx, const char filename, FILE *defaultfp)
287	0	{
288	0	jschar *base;
289	0	JSTokenStream *ts;
290	0	FILE *file;
291
292	0	JS_ARENA_ALLOCATE_CAST(base, jschar *, &cx->tempPool,
293		JS_LINE_LIMIT * sizeof(jschar));
294	0	if (!base)
295	0	return NULL;
296	0	ts = js_NewBufferTokenStream(cx, base, JS_LINE_LIMIT);
297	0	if (!ts)
298	0	return NULL;
299	0	if (!filename \|\| strcmp(filename, "-") == 0) {
300	0	file = defaultfp;
301		} else {
302	0	file = fopen(filename, "r");
303	0	if (!file) {
304	0	JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_OPEN,
305		filename, "No such file or directory");
306	0	return NULL;
307		}
308		}
309	0	ts->userbuf.ptr = ts->userbuf.limit;
310	0	ts->file = file;
311	0	ts->filename = filename;
312	0	return ts;
313		}
314
315		JS_FRIEND_API(JSBool)
316		js_CloseTokenStream(JSContext cx, JSTokenStream ts)
317	1207	{
318	1207	if (ts->flags & TSF_OWNFILENAME)
319	0	JS_free(cx, (void *) ts->filename);
320	1207	if (ts->principals)
321	0	JSPRINCIPALS_DROP(cx, ts->principals);
322	1207	return !ts->file \|\| fclose(ts->file) == 0;
323		}
324
325		JS_FRIEND_API(int)
326		js_fgets(char buf, int size, FILE file)
327	0	{
328	0	int n, i, c;
329	0	JSBool crflag;
330
331	0	n = size - 1;
332	0	if (n < 0)
333	0	return -1;
334
335	0	crflag = JS_FALSE;
336	0	for (i = 0; i < n && (c = getc(file)) != EOF; i++) {
337	0	buf[i] = c;
338	0	if (c == '\n') { /* any \n ends a line */
339	0	i++; /* keep the \n; we know there is room for \0 */
340	0	break;
341		}
342	0	if (crflag) { /* \r not followed by \n ends line at the \r */
343	0	ungetc(c, file);
344	0	break; /* and overwrite c in buf with \0 */
345		}
346	0	crflag = (c == '\r');
347		}
348
349	0	buf[i] = '\0';
350	0	return i;
351		}
352
353		static int32
354		GetChar(JSTokenStream *ts)
355	19844889	{
356	19844889	int32 c;
357	19844889	ptrdiff_t i, j, len, olen;
358	19844889	JSBool crflag;
359	19844889	char cbuf[JS_LINE_LIMIT];
360	19844889	jschar ubuf, nl;
361
362	19844889	if (ts->ungetpos != 0) {
363	748311	c = ts->ungetbuf[--ts->ungetpos];
364		} else {
365	19096578	do {
366	19096578	if (ts->linebuf.ptr == ts->linebuf.limit) {
367	646689	len = PTRDIFF(ts->userbuf.limit, ts->userbuf.ptr, jschar);
368	646689	if (len <= 0) {
369	1207	if (!ts->file) {
370	1207	ts->flags \|= TSF_EOF;
371	1207	return EOF;
372		}
373
374		/* Fill ts->userbuf so that \r and \r\n convert to \n. */
375	0	crflag = (ts->flags & TSF_CRFLAG) != 0;
376	0	len = js_fgets(cbuf, JS_LINE_LIMIT - crflag, ts->file);
377	0	if (len <= 0) {
378	0	ts->flags \|= TSF_EOF;
379	0	return EOF;
380		}
381	0	olen = len;
382	0	ubuf = ts->userbuf.base;
383	0	i = 0;
384	0	if (crflag) {
385	0	ts->flags &= ~TSF_CRFLAG;
386	0	if (cbuf[0] != '\n') {
387	0	ubuf[i++] = '\n';
388	0	len++;
389	0	ts->linepos--;
390		}
391		}
392	0	for (j = 0; i < len; i++, j++)
393	0	ubuf[i] = (jschar) (unsigned char) cbuf[j];
394	0	ts->userbuf.limit = ubuf + len;
395	0	ts->userbuf.ptr = ubuf;
396		}
397	645482	if (ts->listener) {
398	0	ts->listener(ts->filename, ts->lineno, ts->userbuf.ptr, len,
399		&ts->listenerTSData, ts->listenerData);
400		}
401
402	645482	nl = ts->saveEOL;
403	645482	if (!nl) {
404		/*
405		* Any one of \n, \r, or \r\n ends a line (the longest
406		* match wins). Also allow the Unicode line and paragraph
407		* separators.
408		*/
409	19095371	for (nl = ts->userbuf.ptr; nl < ts->userbuf.limit; nl++) {
410		/*
411		* Try to prevent value-testing on most characters by
412		* filtering out characters that aren't 000x or 202x.
413		*/
414	19095371	if ((*nl & 0xDFD0) == 0) {
415	6535606	if (*nl == '\n')
416	627849	break;
417	5907757	if (*nl == '\r') {
418	1207	if (nl + 1 < ts->userbuf.limit && nl[1] == '\n')
419	1207	nl++;
420	1207	break;
421		}
422	5906550	if (nl == LINE_SEPARATOR \|\| nl == PARA_SEPARATOR)
423	18466315	break;
424		}
425		}
426		}
427
428		/*
429		* If there was a line terminator, copy thru it into linebuf.
430		* Else copy JS_LINE_LIMIT-1 bytes into linebuf.
431		*/
432	645482	if (nl < ts->userbuf.limit)
433	645482	len = PTRDIFF(nl, ts->userbuf.ptr, jschar) + 1;
434	645482	if (len >= JS_LINE_LIMIT) {
435	16426	len = JS_LINE_LIMIT - 1;
436	16426	ts->saveEOL = nl;
437		} else {
438	629056	ts->saveEOL = NULL;
439		}
440	645482	js_strncpy(ts->linebuf.base, ts->userbuf.ptr, len);
441	645482	ts->userbuf.ptr += len;
442	645482	olen = len;
443
444		/*
445		* Make sure linebuf contains \n for EOL (don't do this in
446		* userbuf because the user's string might be readonly).
447		*/
448	645482	if (nl < ts->userbuf.limit) {
449	645482	if (*nl == '\r') {
450	0	if (ts->linebuf.base[len-1] == '\r') {
451		/*
452		* Does the line segment end in \r? We must check
453		* for a \n at the front of the next segment before
454		* storing a \n into linebuf. This case matters
455		* only when we're reading from a file.
456		*/
457	0	if (nl + 1 == ts->userbuf.limit && ts->file) {
458	0	len--;
459	0	ts->flags \|= TSF_CRFLAG; /* clear NLFLAG? */
460	0	if (len == 0) {
461		/*
462		* This can happen when a segment ends in
463		* \r\r. Start over. ptr == limit in this
464		* case, so we'll fall into buffer-filling
465		* code.
466		*/
467	0	return GetChar(ts);
468		}
469		} else {
470	0	ts->linebuf.base[len-1] = '\n';
471		}
472		}
473	645482	} else if (*nl == '\n') {
474	645482	if (nl > ts->userbuf.base &&
475		nl[-1] == '\r' &&
476		ts->linebuf.base[len-2] == '\r') {
477	1207	len--;
478	1207	JS_ASSERT(ts->linebuf.base[len] == '\n');
479	1207	ts->linebuf.base[len-1] = '\n';
480		}
481	0	} else if (nl == LINE_SEPARATOR \|\| nl == PARA_SEPARATOR) {
482	0	ts->linebuf.base[len-1] = '\n';
483		}
484		}
485
486		/* Reset linebuf based on adjusted segment length. */
487	645482	ts->linebuf.limit = ts->linebuf.base + len;
488	645482	ts->linebuf.ptr = ts->linebuf.base;
489
490		/* Update position of linebuf within physical userbuf line. */
491	645482	if (!(ts->flags & TSF_NLFLAG))
492	17633	ts->linepos += ts->linelen;
493		else
494	627849	ts->linepos = 0;
495	645482	if (ts->linebuf.limit[-1] == '\n')
496	629056	ts->flags \|= TSF_NLFLAG;
497		else
498	16426	ts->flags &= ~TSF_NLFLAG;
499
500		/* Update linelen from original segment length. */
501	645482	ts->linelen = olen;
502		}
503	19095371	c = *ts->linebuf.ptr++;
504	19095371	} while (JS_ISFORMAT(c));
505		}
506	19843682	if (c == '\n')
507	632439	ts->lineno++;
508	19843682	return c;
509		}
510
511		static void
512		UngetChar(JSTokenStream *ts, int32 c)
513	748311	{
514	748311	if (c == EOF)
515	0	return;
516	748311	JS_ASSERT(ts->ungetpos < sizeof ts->ungetbuf / sizeof ts->ungetbuf[0]);
517	748311	if (c == '\n')
518	3383	ts->lineno--;
519	748311	ts->ungetbuf[ts->ungetpos++] = (jschar)c;
520		}
521
522		static int32
523		PeekChar(JSTokenStream *ts)
524	67424	{
525	67424	int32 c;
526
527	67424	c = GetChar(ts);
528	67424	UngetChar(ts, c);
529	67424	return c;
530		}
531
532		/*
533		* Peek n chars ahead into ts. Return true if n chars were read, false if
534		* there weren't enough characters in the input stream. This function cannot
535		* be used to peek into or past a newline.
536		*/
537		static JSBool
538		PeekChars(JSTokenStream ts, intN n, jschar cp)
539	0	{
540	0	intN i, j;
541	0	int32 c;
542
543	0	for (i = 0; i < n; i++) {
544	0	c = GetChar(ts);
545	0	if (c == EOF)
546	0	break;
547	0	if (c == '\n') {
548	0	UngetChar(ts, c);
549	0	break;
550		}
551	0	cp[i] = (jschar)c;
552		}
553	0	for (j = i - 1; j >= 0; j--)
554	0	UngetChar(ts, cp[j]);
555	0	return i == n;
556		}
557
558		static void
559		SkipChars(JSTokenStream *ts, intN n)
560	0	{
561	0	while (--n >= 0)
562	0	GetChar(ts);
563		}
564
565		static JSBool
566		MatchChar(JSTokenStream *ts, int32 expect)
567	106018	{
568	106018	int32 c;
569
570	106018	c = GetChar(ts);
571	106018	if (c == expect)
572	20292	return JS_TRUE;
573	85726	UngetChar(ts, c);
574	85726	return JS_FALSE;
575		}
576
577		static JSBool
578		ReportCompileErrorNumber(JSContext cx, void handle, uintN flags,
579		uintN errorNumber, JSErrorReport *report,
580		JSBool charArgs, va_list ap)
581	0	{
582	0	JSString *linestr = NULL;
583	0	JSTokenStream *ts = NULL;
584	0	JSCodeGenerator *cg = NULL;
585		#if JS_HAS_XML_SUPPORT
586	0	JSParseNode *pn = NULL;
587		#endif
588	0	JSErrorReporter onError;
589	0	JSTokenPos *tp;
590	0	JSStackFrame *fp;
591	0	uintN index;
592	0	char *message;
593	0	JSBool warning;
594
595	0	memset(report, 0, sizeof (struct JSErrorReport));
596	0	report->flags = flags;
597	0	report->errorNumber = errorNumber;
598	0	message = NULL;
599
600	0	if (!js_ExpandErrorArguments(cx, js_GetErrorMessage, NULL,
601		errorNumber, &message, report, &warning,
602		charArgs, ap)) {
603	0	return JS_FALSE;
604		}
605
606	0	js_AddRoot(cx, &linestr, "error line buffer");
607
608	0	switch (flags & JSREPORT_HANDLE) {
609		case JSREPORT_TS:
610	0	ts = handle;
611	0	break;
612		case JSREPORT_CG:
613	0	cg = handle;
614	0	break;
615		#if JS_HAS_XML_SUPPORT
616		case JSREPORT_PN:
617	0	pn = handle;
618	0	ts = pn->pn_ts;
619		break;
620		#endif
621		}
622
623	0	JS_ASSERT(!ts \|\| ts->linebuf.limit < ts->linebuf.base + JS_LINE_LIMIT);
624	0	onError = cx->errorReporter;
625	0	if (onError) {
626		/*
627		* We are typically called with non-null ts and null cg from jsparse.c.
628		* We can be called with null ts from the regexp compilation functions.
629		* The code generator (jsemit.c) may pass null ts and non-null cg.
630		*/
631		do {
632	0	if (ts) {
633	0	report->filename = ts->filename;
634		#if JS_HAS_XML_SUPPORT
635	0	if (pn) {
636	0	report->lineno = pn->pn_pos.begin.lineno;
637	0	if (report->lineno != ts->lineno)
638	0	break;
639		}
640		#endif
641	0	report->lineno = ts->lineno;
642	0	linestr = js_NewStringCopyN(cx, ts->linebuf.base,
643		PTRDIFF(ts->linebuf.limit,
644		ts->linebuf.base,
645		jschar),
646		0);
647	0	report->linebuf = linestr
648		? JS_GetStringBytes(linestr)
649		: NULL;
650	0	tp = &ts->tokens[(ts->cursor+ts->lookahead) & NTOKENS_MASK].pos;
651		#if JS_HAS_XML_SUPPORT
652	0	if (pn)
653	0	tp = &pn->pn_pos;
654		#endif
655		/*
656		* FIXME: What should instead happen here is that we should
657		* find error-tokens in userbuf, if !ts->file. That will
658		* allow us to deliver a more helpful error message, which
659		* includes all or part of the bad string or bad token. The
660		* code here yields something that looks truncated.
661		* See https://bugzilla.mozilla.org/show_bug.cgi?id=352970
662		*/
663	0	index = 0;
664	0	if (tp->begin.lineno == tp->end.lineno) {
665	0	if (tp->begin.index < ts->linepos)
666	0	break;
667
668	0	index = tp->begin.index - ts->linepos;
669		}
670
671	0	report->tokenptr = linestr ? report->linebuf + index : NULL;
672	0	report->uclinebuf = linestr ? JS_GetStringChars(linestr) : NULL;
673	0	report->uctokenptr = linestr ? report->uclinebuf + index : NULL;
674	0	break;
675		}
676
677	0	if (cg) {
678	0	report->filename = cg->filename;
679	0	report->lineno = CG_CURRENT_LINE(cg);
680	0	break;
681		}
682
683		/*
684		* If we can't find out where the error was based on the current frame,
685		* see if the next frame has a script/pc combo we can use.
686		*/
687	0	for (fp = cx->fp; fp; fp = fp->down) {
688	0	if (fp->script && fp->pc) {
689	0	report->filename = fp->script->filename;
690	0	report->lineno = js_PCToLineNumber(cx, fp->script, fp->pc);
691	0	break;
692		}
693		}
694		} while (0);
695
696		#if JS_HAS_ERROR_EXCEPTIONS
697		/*
698		* If there's a runtime exception type associated with this error
699		* number, set that as the pending exception. For errors occuring at
700		* compile time, this is very likely to be a JSEXN_SYNTAXERR.
701		*
702		* If an exception is thrown but not caught, the JSREPORT_EXCEPTION
703		* flag will be set in report.flags. Proper behavior for an error
704		* reporter is to ignore a report with this flag for all but top-level
705		* compilation errors. The exception will remain pending, and so long
706		* as the non-top-level "load", "eval", or "compile" native function
707		* returns false, the top-level reporter will eventually receive the
708		* uncaught exception report.
709		*
710		* XXX it'd probably be best if there was only one call to this
711		* function, but there seem to be two error reporter call points.
712		*/
713
714		/*
715		* Try to raise an exception only if there isn't one already set --
716		* otherwise the exception will describe the last compile-time error,
717		* which is likely spurious.
718		*/
719	0	if (!ts \|\| !(ts->flags & TSF_ERROR)) {
720	0	if (js_ErrorToException(cx, message, report))
721	0	onError = NULL;
722		}
723
724		/*
725		* Suppress any compile-time errors that don't occur at the top level.
726		* This may still fail, as interplevel may be zero in contexts where we
727		* don't really want to call the error reporter, as when js is called
728		* by other code which could catch the error.
729		*/
730	0	if (cx->interpLevel != 0 && !JSREPORT_IS_WARNING(flags))
731	0	onError = NULL;
732		#endif
733	0	if (onError) {
734	0	JSDebugErrorHook hook = cx->runtime->debugErrorHook;
735
736		/*
737		* If debugErrorHook is present then we give it a chance to veto
738		* sending the error on to the regular error reporter.
739		*/
740	0	if (hook && !hook(cx, message, report,
741		cx->runtime->debugErrorHookData)) {
742	0	onError = NULL;
743		}
744		}
745	0	if (onError)
746	0	(*onError)(cx, message, report);
747		}
748
749	0	if (message)
750	0	JS_free(cx, message);
751	0	if (report->ucmessage)
752	0	JS_free(cx, (void *)report->ucmessage);
753
754	0	js_RemoveRoot(cx->runtime, &linestr);
755
756	0	if (ts && !JSREPORT_IS_WARNING(flags)) {
757		/* Set the error flag to suppress spurious reports. */
758	0	ts->flags \|= TSF_ERROR;
759		}
760
761	0	return warning;
762		}
763
764		JSBool
765		js_ReportCompileErrorNumber(JSContext cx, void handle, uintN flags,
766		uintN errorNumber, ...)
767	32	{
768	32	va_list ap;
769	32	JSErrorReport report;
770	32	JSBool warning;
771
772	32	if ((flags & JSREPORT_STRICT) && !JS_HAS_STRICT_OPTION(cx))
773	32	return JS_TRUE;
774
775	0	va_start(ap, errorNumber);
776	0	warning = ReportCompileErrorNumber(cx, handle, flags, errorNumber,
777		&report, JS_TRUE, ap);
778	0	va_end(ap);
779
780		/*
781		* We have to do this here because js_ReportCompileErrorNumberUC doesn't
782		* need to do this.
783		*/
784	0	if (report.messageArgs) {
785	0	int i = 0;
786	0	while (report.messageArgs[i])
787	0	JS_free(cx, (void *)report.messageArgs[i++]);
788	0	JS_free(cx, (void *)report.messageArgs);
789		}
790
791	0	return warning;
792		}
793
794		JSBool
795		js_ReportCompileErrorNumberUC(JSContext cx, void handle, uintN flags,
796		uintN errorNumber, ...)
797	0	{
798	0	va_list ap;
799	0	JSErrorReport report;
800	0	JSBool warning;
801
802	0	if ((flags & JSREPORT_STRICT) && !JS_HAS_STRICT_OPTION(cx))
803	0	return JS_TRUE;
804
805	0	va_start(ap, errorNumber);
806	0	warning = ReportCompileErrorNumber(cx, handle, flags, errorNumber,
807		&report, JS_FALSE, ap);
808	0	va_end(ap);
809
810	0	if (report.messageArgs)
811	0	JS_free(cx, (void *)report.messageArgs);
812
813	0	return warning;
814		}
815
816		static JSBool
817		GrowStringBuffer(JSStringBuffer *sb, size_t newlength)
818	0	{
819	0	ptrdiff_t offset;
820	0	jschar *bp;
821
822	0	offset = PTRDIFF(sb->ptr, sb->base, jschar);
823	0	JS_ASSERT(offset >= 0);
824	0	newlength += offset + 1;
825	0	if ((size_t)offset < newlength && newlength < ~(size_t)0 / sizeof(jschar))
826	0	bp = realloc(sb->base, newlength * sizeof(jschar));
827		else
828	0	bp = NULL;
829	0	if (!bp) {
830	0	free(sb->base);
831	0	sb->base = STRING_BUFFER_ERROR_BASE;
832	0	return JS_FALSE;
833		}
834	0	sb->base = bp;
835	0	sb->ptr = bp + offset;
836	0	sb->limit = bp + newlength - 1;
837	0	return JS_TRUE;
838		}
839
840		static void
841		FreeStringBuffer(JSStringBuffer *sb)
842	0	{
843	0	JS_ASSERT(STRING_BUFFER_OK(sb));
844	0	if (sb->base)
845	0	free(sb->base);
846		}
847
848		void
849		js_InitStringBuffer(JSStringBuffer *sb)
850	0	{
851	0	sb->base = sb->limit = sb->ptr = NULL;
852	0	sb->data = NULL;
853	0	sb->grow = GrowStringBuffer;
854	0	sb->free = FreeStringBuffer;
855		}
856
857		void
858		js_FinishStringBuffer(JSStringBuffer *sb)
859	0	{
860	0	sb->free(sb);
861		}
862
863		#define ENSURE_STRING_BUFFER(sb,n) \
864		((sb)->ptr + (n) <= (sb)->limit \|\| sb->grow(sb, n))
865
866		static void
867		FastAppendChar(JSStringBuffer *sb, jschar c)
868	15258425	{
869	15258425	if (!STRING_BUFFER_OK(sb))
870	0	return;
871	15258425	if (!ENSURE_STRING_BUFFER(sb, 1))
872	0	return;
873	15258425	*sb->ptr++ = c;
874		}
875
876		void
877		js_AppendChar(JSStringBuffer *sb, jschar c)
878	0	{
879	0	jschar *bp;
880
881	0	if (!STRING_BUFFER_OK(sb))
882	0	return;
883	0	if (!ENSURE_STRING_BUFFER(sb, 1))
884	0	return;
885	0	bp = sb->ptr;
886	0	*bp++ = c;
887	0	*bp = 0;
888	0	sb->ptr = bp;
889		}
890
891		#if JS_HAS_XML_SUPPORT
892
893		void
894		js_RepeatChar(JSStringBuffer *sb, jschar c, uintN count)
895	0	{
896	0	jschar *bp;
897
898	0	if (!STRING_BUFFER_OK(sb) \|\| count == 0)
899	0	return;
900	0	if (!ENSURE_STRING_BUFFER(sb, count))
901	0	return;
902	0	for (bp = sb->ptr; count; --count)
903	0	*bp++ = c;
904	0	*bp = 0;
905	0	sb->ptr = bp;
906		}
907
908		void
909		js_AppendCString(JSStringBuffer sb, const char asciiz)
910	0	{
911	0	size_t length;
912	0	jschar *bp;
913
914	0	if (!STRING_BUFFER_OK(sb) \|\| *asciiz == '\0')
915	0	return;
916	0	length = strlen(asciiz);
917	0	if (!ENSURE_STRING_BUFFER(sb, length))
918	0	return;
919	0	for (bp = sb->ptr; length; --length)
920	0	bp++ = (jschar) asciiz++;
921	0	*bp = 0;
922	0	sb->ptr = bp;
923		}
924
925		void
926		js_AppendJSString(JSStringBuffer sb, JSString str)
927	0	{
928	0	size_t length;
929	0	jschar *bp;
930
931	0	if (!STRING_BUFFER_OK(sb))
932	0	return;
933	0	length = JSSTRING_LENGTH(str);
934	0	if (length == 0 \|\| !ENSURE_STRING_BUFFER(sb, length))
935	0	return;
936	0	bp = sb->ptr;
937	0	js_strncpy(bp, JSSTRING_CHARS(str), length);
938	0	bp += length;
939	0	*bp = 0;
940	0	sb->ptr = bp;
941		}
942
943		static JSBool
944		GetXMLEntity(JSContext cx, JSTokenStream ts)
945	0	{
946	0	ptrdiff_t offset, length, i;
947	0	int32 c, d;
948	0	JSBool ispair;
949	0	jschar *bp, digit;
950	0	char *bytes;
951	0	JSErrNum msg;
952
953		/* Put the entity, including the '&' already scanned, in ts->tokenbuf. */
954	0	offset = PTRDIFF(ts->tokenbuf.ptr, ts->tokenbuf.base, jschar);
955	0	FastAppendChar(&ts->tokenbuf, '&');
956	0	while ((c = GetChar(ts)) != ';') {
957	0	if (c == EOF \|\| c == '\n') {
958	0	js_ReportCompileErrorNumber(cx, ts,
959		JSREPORT_TS \| JSREPORT_ERROR,
960		JSMSG_END_OF_XML_ENTITY);
961	0	return JS_FALSE;
962		}
963	0	FastAppendChar(&ts->tokenbuf, (jschar) c);
964		}
965
966		/* Let length be the number of jschars after the '&', including the ';'. */
967	0	length = PTRDIFF(ts->tokenbuf.ptr, ts->tokenbuf.base, jschar) - offset;
968	0	bp = ts->tokenbuf.base + offset;
969	0	c = d = 0;
970	0	ispair = JS_FALSE;
971	0	if (length > 2 && bp[1] == '#') {
972		/* Match a well-formed XML Character Reference. */
973	0	i = 2;
974	0	if (length > 3 && JS_TOLOWER(bp[i]) == 'x') {
975	0	if (length > 9) /* at most 6 hex digits allowed */
976	0	goto badncr;
977	0	while (++i < length) {
978	0	digit = bp[i];
979	0	if (!JS7_ISHEX(digit))
980	0	goto badncr;
981	0	c = (c << 4) + JS7_UNHEX(digit);
982		}
983		} else {
984	0	while (i < length) {
985	0	digit = bp[i++];
986	0	if (!JS7_ISDEC(digit))
987	0	goto badncr;
988	0	c = (c * 10) + JS7_UNDEC(digit);
989	0	if (c < 0)
990	0	goto badncr;
991		}
992		}
993
994	0	if (0x10000 <= c && c <= 0x10FFFF) {
995		/* Form a surrogate pair (c, d) -- c is the high surrogate. */
996	0	d = 0xDC00 + (c & 0x3FF);
997	0	c = 0xD7C0 + (c >> 10);
998	0	ispair = JS_TRUE;
999		} else {
1000		/* Enforce the http://www.w3.org/TR/REC-xml/#wf-Legalchar WFC. */
1001	0	if (c != 0x9 && c != 0xA && c != 0xD &&
1002		!(0x20 <= c && c <= 0xD7FF) &&
1003		!(0xE000 <= c && c <= 0xFFFD)) {
1004	0	goto badncr;
1005		}
1006		}
1007		} else {
1008		/* Try to match one of the five XML 1.0 predefined entities. */
1009	0	switch (length) {
1010		case 3:
1011	0	if (bp[2] == 't') {
1012	0	if (bp[1] == 'l')
1013	0	c = '<';
1014	0	else if (bp[1] == 'g')
1015	0	c = '>';
1016		}
1017	0	break;
1018		case 4:
1019	0	if (bp[1] == 'a' && bp[2] == 'm' && bp[3] == 'p')
1020	0	c = '&';
1021	0	break;
1022		case 5:
1023	0	if (bp[3] == 'o') {
1024	0	if (bp[1] == 'a' && bp[2] == 'p' && bp[4] == 's')
1025	0	c = '\'';
1026	0	else if (bp[1] == 'q' && bp[2] == 'u' && bp[4] == 't')
1027	0	c = '"';
1028		}
1029		break;
1030		}
1031	0	if (c == 0) {
1032	0	msg = JSMSG_UNKNOWN_XML_ENTITY;
1033	0	goto bad;
1034		}
1035		}
1036
1037		/* If we matched, retract ts->tokenbuf and store the entity's value. */
1038	0	*bp++ = (jschar) c;
1039	0	if (ispair)
1040	0	*bp++ = (jschar) d;
1041	0	*bp = 0;
1042	0	ts->tokenbuf.ptr = bp;
1043	0	return JS_TRUE;
1044
1045		badncr:
1046	0	msg = JSMSG_BAD_XML_NCR;
1047		bad:
1048		/* No match: throw a TypeError per ECMA-357 10.3.2.1 step 8(a). */
1049	0	bytes = js_DeflateString(cx, bp + 1,
1050		PTRDIFF(ts->tokenbuf.ptr, bp, jschar) - 1);
1051	0	if (bytes) {
1052	0	js_ReportCompileErrorNumber(cx, ts, JSREPORT_TS \| JSREPORT_ERROR,
1053		msg, bytes);
1054	0	JS_free(cx, bytes);
1055		}
1056	0	return JS_FALSE;
1057		}
1058
1059		#endif /* JS_HAS_XML_SUPPORT */
1060
1061		JSTokenType
1062		js_PeekToken(JSContext cx, JSTokenStream ts)
1063	2141054	{
1064	2141054	JSTokenType tt;
1065
1066	2141054	if (ts->lookahead != 0) {
1067	1814109	tt = ts->tokens[(ts->cursor + ts->lookahead) & NTOKENS_MASK].type;
1068		} else {
1069	326945	tt = js_GetToken(cx, ts);
1070	326945	js_UngetToken(ts);
1071		}
1072	2141054	return tt;
1073		}
1074
1075		JSTokenType
1076		js_PeekTokenSameLine(JSContext cx, JSTokenStream ts)
1077	908938	{
1078	908938	JSTokenType tt;
1079
1080	908938	JS_ASSERT(ts->lookahead == 0 \|\|
1081		ON_CURRENT_LINE(ts, CURRENT_TOKEN(ts).pos) \|\|
1082		ts->tokens[(ts->cursor + ts->lookahead) & NTOKENS_MASK].type
1083		== TOK_EOL);
1084	908938	ts->flags \|= TSF_NEWLINES;
1085	908938	tt = js_PeekToken(cx, ts);
1086	908938	ts->flags &= ~TSF_NEWLINES;
1087	908938	return tt;
1088		}
1089
1090		/*
1091		* We have encountered a '\': check for a Unicode escape sequence after it,
1092		* returning the character code value if we found a Unicode escape sequence.
1093		* Otherwise, non-destructively return the original '\'.
1094		*/
1095		static int32
1096		GetUnicodeEscape(JSTokenStream *ts)
1097	0	{
1098	0	jschar cp[5];
1099	0	int32 c;
1100
1101	0	if (PeekChars(ts, 5, cp) && cp[0] == 'u' &&
1102		JS7_ISHEX(cp[1]) && JS7_ISHEX(cp[2]) &&
1103		JS7_ISHEX(cp[3]) && JS7_ISHEX(cp[4]))
1104		{
1105	0	c = (((((JS7_UNHEX(cp[1]) << 4)
1106		+ JS7_UNHEX(cp[2])) << 4)
1107		+ JS7_UNHEX(cp[3])) << 4)
1108		+ JS7_UNHEX(cp[4]);
1109	0	SkipChars(ts, 5);
1110	0	return c;
1111		}
1112	0	return '\\';
1113		}
1114
1115		static JSToken *
1116		NewToken(JSTokenStream *ts, ptrdiff_t adjust)
1117	1789073	{
1118	1789073	JSToken *tp;
1119
1120	1789073	ts->cursor = (ts->cursor + 1) & NTOKENS_MASK;
1121	1789073	tp = &CURRENT_TOKEN(ts);
1122	1789073	tp->ptr = ts->linebuf.ptr + adjust;
1123	1789073	tp->pos.begin.index = ts->linepos +
1124		PTRDIFF(tp->ptr, ts->linebuf.base, jschar) -
1125		ts->ungetpos;
1126	1789073	tp->pos.begin.lineno = tp->pos.end.lineno = (uint16)ts->lineno;
1127	1789073	return tp;
1128		}
1129
1130		JSTokenType
1131		js_GetToken(JSContext cx, JSTokenStream ts)
1132	14952274	{
1133	14952274	JSTokenType tt;
1134	14952274	int32 c, qc;
1135	14952274	JSToken *tp;
1136	14952274	JSAtom *atom;
1137	14952274	JSBool hadUnicodeEscape;
1138
1139		#define INIT_TOKENBUF() (ts->tokenbuf.ptr = ts->tokenbuf.base)
1140		#define TOKENBUF_LENGTH() PTRDIFF(ts->tokenbuf.ptr, ts->tokenbuf.base, jschar)
1141		#define TOKENBUF_OK() STRING_BUFFER_OK(&ts->tokenbuf)
1142		#define TOKENBUF_TO_ATOM() (TOKENBUF_OK() \
1143		? js_AtomizeChars(cx, \
1144		TOKENBUF_BASE(), \
1145		TOKENBUF_LENGTH(), \
1146		0) \
1147		: NULL)
1148		#define ADD_TO_TOKENBUF(c) FastAppendChar(&ts->tokenbuf, (jschar) (c))
1149
1150		/* The following 4 macros should only be used when TOKENBUF_OK() is true. */
1151		#define TOKENBUF_BASE() (ts->tokenbuf.base)
1152		#define TOKENBUF_CHAR(i) (ts->tokenbuf.base[i])
1153		#define TRIM_TOKENBUF(i) (ts->tokenbuf.ptr = ts->tokenbuf.base + i)
1154		#define NUL_TERM_TOKENBUF() (*ts->tokenbuf.ptr = 0)
1155
1156		/* If there was a fatal error, keep returning TOK_ERROR. */
1157	14952274	if (ts->flags & TSF_ERROR)
1158	0	return TOK_ERROR;
1159
1160		/* Check for a pushed-back token resulting from mismatching lookahead. */
1161	14952274	while (ts->lookahead != 0) {
1162	13163905	JS_ASSERT(!(ts->flags & TSF_XMLTEXTMODE));
1163	13163905	ts->lookahead--;
1164	13163905	ts->cursor = (ts->cursor + 1) & NTOKENS_MASK;
1165	13163905	tt = CURRENT_TOKEN(ts).type;
1166	13163905	if (tt != TOK_EOL \|\| (ts->flags & TSF_NEWLINES))
1167	13163905	return tt;
1168		}
1169
1170		#if JS_HAS_XML_SUPPORT
1171	1788369	if (ts->flags & TSF_XMLTEXTMODE) {
1172	0	tt = TOK_XMLSPACE; /* veto if non-space, return TOK_XMLTEXT */
1173	0	tp = NewToken(ts, 0);
1174	0	INIT_TOKENBUF();
1175	0	qc = (ts->flags & TSF_XMLONLYMODE) ? '<' : '{';
1176
1177	0	while ((c = GetChar(ts)) != qc && c != '<' && c != EOF) {
1178	0	if (c == '&' && qc == '<') {
1179	0	if (!GetXMLEntity(cx, ts))
1180	0	goto error;
1181	0	tt = TOK_XMLTEXT;
1182	0	continue;
1183		}
1184
1185	0	if (!JS_ISXMLSPACE(c))
1186	0	tt = TOK_XMLTEXT;
1187	0	ADD_TO_TOKENBUF(c);
1188		}
1189	0	UngetChar(ts, c);
1190
1191	0	if (TOKENBUF_LENGTH() == 0) {
1192	0	atom = NULL;
1193		} else {
1194	0	atom = TOKENBUF_TO_ATOM();
1195	0	if (!atom)
1196	0	goto error;
1197		}
1198	0	tp->pos.end.lineno = (uint16)ts->lineno;
1199	0	tp->t_op = JSOP_STRING;
1200	0	tp->t_atom = atom;
1201	0	goto out;
1202		}
1203
1204	1788369	if (ts->flags & TSF_XMLTAGMODE) {
1205	0	tp = NewToken(ts, 0);
1206	0	c = GetChar(ts);
1207	0	if (JS_ISXMLSPACE(c)) {
1208	0	do {
1209	0	c = GetChar(ts);
1210	0	} while (JS_ISXMLSPACE(c));
1211	0	UngetChar(ts, c);
1212	0	tt = TOK_XMLSPACE;
1213	0	goto out;
1214		}
1215
1216	0	if (c == EOF) {
1217	0	tt = TOK_EOF;
1218	0	goto out;
1219		}
1220
1221	0	INIT_TOKENBUF();
1222	0	if (JS_ISXMLNSSTART(c)) {
1223	0	JSBool sawColon = JS_FALSE;
1224
1225	0	ADD_TO_TOKENBUF(c);
1226	0	while ((c = GetChar(ts)) != EOF && JS_ISXMLNAME(c)) {
1227	0	if (c == ':') {
1228	0	int nextc;
1229
1230	0	if (sawColon \|\|
1231		(nextc = PeekChar(ts),
1232		((ts->flags & TSF_XMLONLYMODE) \|\| nextc != '{') &&
1233		!JS_ISXMLNAME(nextc))) {
1234	0	js_ReportCompileErrorNumber(cx, ts,
1235		JSREPORT_TS \|
1236		JSREPORT_ERROR,
1237		JSMSG_BAD_XML_QNAME);
1238	0	goto error;
1239		}
1240	0	sawColon = JS_TRUE;
1241		}
1242
1243	0	ADD_TO_TOKENBUF(c);
1244		}
1245
1246	0	UngetChar(ts, c);
1247	0	atom = TOKENBUF_TO_ATOM();
1248	0	if (!atom)
1249	0	goto error;
1250	0	tp->t_op = JSOP_STRING;
1251	0	tp->t_atom = atom;
1252	0	tt = TOK_XMLNAME;
1253	0	goto out;
1254		}
1255
1256	0	switch (c) {
1257		case '{':
1258	0	if (ts->flags & TSF_XMLONLYMODE)
1259	0	goto bad_xml_char;
1260	0	tt = TOK_LC;
1261	0	goto out;
1262
1263		case '=':
1264	0	tt = TOK_ASSIGN;
1265	0	goto out;
1266
1267		case '"':
1268		case '\'':
1269	0	qc = c;
1270	0	while ((c = GetChar(ts)) != qc) {
1271	0	if (c == EOF) {
1272	0	js_ReportCompileErrorNumber(cx, ts,
1273		JSREPORT_TS \| JSREPORT_ERROR,
1274		JSMSG_UNTERMINATED_STRING);
1275	0	goto error;
1276		}
1277
1278		/*
1279		* XML attribute values are double-quoted when pretty-printed,
1280		* so escape " if it is expressed directly in a single-quoted
1281		* attribute value.
1282		*/
1283	0	if (c == '"' && !(ts->flags & TSF_XMLONLYMODE)) {
1284	0	JS_ASSERT(qc == '\'');
1285	0	js_AppendCString(&ts->tokenbuf, js_quot_entity_str);
1286	0	continue;
1287		}
1288
1289	0	if (c == '&' && (ts->flags & TSF_XMLONLYMODE)) {
1290	0	if (!GetXMLEntity(cx, ts))
1291	0	goto error;
1292	0	continue;
1293		}
1294
1295	0	ADD_TO_TOKENBUF(c);
1296		}
1297	0	atom = TOKENBUF_TO_ATOM();
1298	0	if (!atom)
1299	0	goto error;
1300	0	tp->pos.end.lineno = (uint16)ts->lineno;
1301	0	tp->t_op = JSOP_STRING;
1302	0	tp->t_atom = atom;
1303	0	tt = TOK_XMLATTR;
1304	0	goto out;
1305
1306		case '>':
1307	0	tt = TOK_XMLTAGC;
1308	0	goto out;
1309
1310		case '/':
1311	0	if (MatchChar(ts, '>')) {
1312	0	tt = TOK_XMLPTAGC;
1313	0	goto out;
1314		}
1315		/* FALL THROUGH */
1316
1317		bad_xml_char:
1318		default:
1319	0	js_ReportCompileErrorNumber(cx, ts, JSREPORT_TS \| JSREPORT_ERROR,
1320		JSMSG_BAD_XML_CHARACTER);
1321	0	goto error;
1322		}
1323		/* NOTREACHED */
1324		}
1325		#endif /* JS_HAS_XML_SUPPORT */
1326
1327		retry:
1328	3756174	do {
1329	3756174	c = GetChar(ts);
1330	3756174	if (c == '\n') {
1331	628512	ts->flags &= ~TSF_DIRTYLINE;
1332	628512	if (ts->flags & TSF_NEWLINES)
1333	0	break;
1334		}
1335	3756174	} while (JS_ISSPACE(c));
1336
1337	1789073	tp = NewToken(ts, -1);
1338	1789073	if (c == EOF) {
1339	1207	tt = TOK_EOF;
1340	1207	goto out;
1341		}
1342
1343	1787866	hadUnicodeEscape = JS_FALSE;
1344	1787866	if (JS_ISIDSTART(c) \|\|
1345		(c == '\\' &&
1346		(c = GetUnicodeEscape(ts),
1347		hadUnicodeEscape = JS_ISIDSTART(c)))) {
1348	578845	INIT_TOKENBUF();
1349	4796025	for (;;) {
1350	4217180	ADD_TO_TOKENBUF(c);
1351	4217180	c = GetChar(ts);
1352	4217180	if (c == '\\') {
1353	0	c = GetUnicodeEscape(ts);
1354	0	if (!JS_ISIDENT(c))
1355	0	break;
1356	0	hadUnicodeEscape = JS_TRUE;
1357		} else {
1358	4217180	if (!JS_ISIDENT(c))
1359	578845	break;
1360		}
1361		}
1362	578845	UngetChar(ts, c);
1363
1364	578845	atom = TOKENBUF_TO_ATOM();
1365	578845	if (!atom)
1366	0	goto error;
1367	578845	if (!hadUnicodeEscape && ATOM_KEYWORD(atom)) {
1368	41301	struct keyword *kw;
1369
1370	41301	JS_ASSERT(!(atom->flags & ATOM_HIDDEN));
1371	41301	kw = ATOM_KEYWORD(atom);
1372	41301	if (kw->tokentype == TOK_RESERVED) {
1373	0	char buf[MAX_KEYWORD_LENGTH + 1];
1374	0	size_t buflen = sizeof(buf) - 1;
1375	0	if (!js_DeflateStringToBuffer(cx, TOKENBUF_BASE(), TOKENBUF_LENGTH(),
1376		buf, &buflen))
1377	0	goto error;
1378	0	buf [buflen] = 0;
1379	0	if (!js_ReportCompileErrorNumber(cx, ts,
1380		JSREPORT_TS \|
1381		JSREPORT_WARNING \|
1382		JSREPORT_STRICT,
1383		JSMSG_RESERVED_ID, buf)) {
1384	0	goto error;
1385		}
1386	41301	} else if (JS_VERSION_IS_ECMA(cx) \|\|
1387		kw->version <= (cx->version & JSVERSION_MASK)) {
1388	41301	tt = kw->tokentype;
1389	41301	tp->t_op = (JSOp) kw->op;
1390	41301	goto out;
1391		}
1392		}
1393	537544	tp->t_op = JSOP_NAME;
1394	537544	tp->t_atom = atom;
1395	537544	tt = TOK_NAME;
1396	537544	goto out;
1397		}
1398
1399	1209021	if (JS7_ISDEC(c) \|\| (c == '.' && JS7_ISDEC(PeekChar(ts)))) {
1400	16316	jsint radix;
1401	16316	const jschar *endptr;
1402	16316	jsdouble dval;
1403
1404	16316	radix = 10;
1405	16316	INIT_TOKENBUF();
1406
1407	16316	if (c == '0') {
1408	7006	ADD_TO_TOKENBUF(c);
1409	7006	c = GetChar(ts);
1410	7006	if (JS_TOLOWER(c) == 'x') {
1411	0	ADD_TO_TOKENBUF(c);
1412	0	c = GetChar(ts);
1413	0	radix = 16;
1414	7006	} else if (JS7_ISDEC(c)) {
1415	0	radix = 8;
1416		}
1417		}
1418
1419	25626	while (JS7_ISHEX(c)) {
1420	9310	if (radix < 16) {
1421	9310	if (JS7_ISLET(c))
1422	0	break;
1423
1424		/*
1425		* We permit 08 and 09 as decimal numbers, which makes our
1426		* behaviour a superset of the ECMA numeric grammar. We might
1427		* not always be so permissive, so we warn about it.
1428		*/
1429	9310	if (radix == 8 && c >= '8') {
1430	0	if (!js_ReportCompileErrorNumber(cx, ts,
1431		JSREPORT_TS \|
1432		JSREPORT_WARNING,
1433		JSMSG_BAD_OCTAL,
1434		c == '8' ? "08" : "09")) {
1435	0	goto error;
1436		}
1437	0	radix = 10;
1438		}
1439		}
1440	9310	ADD_TO_TOKENBUF(c);
1441	9310	c = GetChar(ts);
1442		}
1443
1444	16316	if (radix == 10 && (c == '.' \|\| JS_TOLOWER(c) == 'e')) {
1445	0	if (c == '.') {
1446	0	do {
1447	0	ADD_TO_TOKENBUF(c);
1448	0	c = GetChar(ts);
1449	0	} while (JS7_ISDEC(c));
1450		}
1451	0	if (JS_TOLOWER(c) == 'e') {
1452	0	ADD_TO_TOKENBUF(c);
1453	0	c = GetChar(ts);
1454	0	if (c == '+' \|\| c == '-') {
1455	0	ADD_TO_TOKENBUF(c);
1456	0	c = GetChar(ts);
1457		}
1458	0	if (!JS7_ISDEC(c)) {
1459	0	js_ReportCompileErrorNumber(cx, ts,
1460		JSREPORT_TS \| JSREPORT_ERROR,
1461		JSMSG_MISSING_EXPONENT);
1462	0	goto error;
1463		}
1464	0	do {
1465	0	ADD_TO_TOKENBUF(c);
1466	0	c = GetChar(ts);
1467	0	} while (JS7_ISDEC(c));
1468		}
1469		}
1470
1471		/* Put back the next char and NUL-terminate tokenbuf for js_strto. /
1472	16316	UngetChar(ts, c);
1473	16316	ADD_TO_TOKENBUF(0);
1474
1475	16316	if (!TOKENBUF_OK())
1476	0	goto error;
1477	16316	if (radix == 10) {
1478	16316	if (!js_strtod(cx, TOKENBUF_BASE(), &endptr, &dval)) {
1479	0	js_ReportCompileErrorNumber(cx, ts,
1480		JSREPORT_TS \| JSREPORT_ERROR,
1481		JSMSG_OUT_OF_MEMORY);
1482	0	goto error;
1483		}
1484		} else {
1485	0	if (!js_strtointeger(cx, TOKENBUF_BASE(), &endptr, radix, &dval)) {
1486	0	js_ReportCompileErrorNumber(cx, ts,
1487		JSREPORT_TS \| JSREPORT_ERROR,
1488		JSMSG_OUT_OF_MEMORY);
1489	0	goto error;
1490		}
1491		}
1492	16316	tp->t_dval = dval;
1493	16316	tt = TOK_NUMBER;
1494	16316	goto out;
1495		}
1496
1497	1192705	if (c == '"' \|\| c == '\'') {
1498	139291	qc = c;
1499	139291	INIT_TOKENBUF();
1500	11142656	while ((c = GetChar(ts)) != qc) {
1501	11003365	if (c == '\n' \|\| c == EOF) {
1502	0	UngetChar(ts, c);
1503	0	js_ReportCompileErrorNumber(cx, ts,
1504		JSREPORT_TS \| JSREPORT_ERROR,
1505		JSMSG_UNTERMINATED_STRING);
1506	0	goto error;
1507		}
1508	11003365	if (c == '\\') {
1509	494161	switch (c = GetChar(ts)) {
1510	0	case 'b': c = '\b'; break;
1511	0	case 'f': c = '\f'; break;
1512	459837	case 'n': c = '\n'; break;
1513	0	case 'r': c = '\r'; break;
1514	0	case 't': c = '\t'; break;
1515	0	case 'v': c = '\v'; break;
1516
1517		default:
1518	34324	if ('0' <= c && c < '8') {
1519	0	int32 val = JS7_UNDEC(c);
1520
1521	0	c = PeekChar(ts);
1522	0	if ('0' <= c && c < '8') {
1523	0	val = 8 * val + JS7_UNDEC(c);
1524	0	GetChar(ts);
1525	0	c = PeekChar(ts);
1526	0	if ('0' <= c && c < '8') {
1527	0	int32 save = val;
1528	0	val = 8 * val + JS7_UNDEC(c);
1529	0	if (val <= 0377)
1530	0	GetChar(ts);
1531		else
1532	0	val = save;
1533		}
1534		}
1535
1536	0	c = (jschar)val;
1537	34324	} else if (c == 'u') {
1538	0	jschar cp[4];
1539	0	if (PeekChars(ts, 4, cp) &&
1540		JS7_ISHEX(cp[0]) && JS7_ISHEX(cp[1]) &&
1541		JS7_ISHEX(cp[2]) && JS7_ISHEX(cp[3])) {
1542	0	c = (((((JS7_UNHEX(cp[0]) << 4)
1543		+ JS7_UNHEX(cp[1])) << 4)
1544		+ JS7_UNHEX(cp[2])) << 4)
1545		+ JS7_UNHEX(cp[3]);
1546	0	SkipChars(ts, 4);
1547		}
1548	34324	} else if (c == 'x') {
1549	0	jschar cp[2];
1550	0	if (PeekChars(ts, 2, cp) &&
1551		JS7_ISHEX(cp[0]) && JS7_ISHEX(cp[1])) {
1552	0	c = (JS7_UNHEX(cp[0]) << 4) + JS7_UNHEX(cp[1]);
1553	0	SkipChars(ts, 2);
1554		}
1555	34324	} else if (c == '\n' && JS_VERSION_IS_ECMA(cx)) {
1556		/* ECMA follows C by removing escaped newlines. */
1557	11003365	continue;
1558		}
1559	11003365	break;
1560		}
1561		}
1562	11003365	ADD_TO_TOKENBUF(c);
1563		}
1564	139291	atom = TOKENBUF_TO_ATOM();
1565	139291	if (!atom)
1566	0	goto error;
1567	139291	tp->pos.end.lineno = (uint16)ts->lineno;
1568	139291	tp->t_op = JSOP_STRING;
1569	139291	tp->t_atom = atom;
1570	139291	tt = TOK_STRING;
1571	139291	goto out;
1572		}
1573
1574	1053414	switch (c) {
1575	0	case '\n': tt = TOK_EOL; goto eol_out;
1576	269065	case ';': tt = TOK_SEMI; break;
1577	26381	case '[': tt = TOK_LB; break;
1578	26381	case ']': tt = TOK_RB; break;
1579	21722	case '{': tt = TOK_LC; break;
1580	21722	case '}': tt = TOK_RC; break;
1581	280417	case '(': tt = TOK_LP; break;
1582	280417	case ')': tt = TOK_RP; break;
1583	48094	case ',': tt = TOK_COMMA; break;
1584	0	case '?': tt = TOK_HOOK; break;
1585
1586		case '.':
1587		#if JS_HAS_XML_SUPPORT
1588	33504	if (MatchChar(ts, c))
1589	0	tt = TOK_DBLDOT;
1590		else
1591		#endif
1592	33504	tt = TOK_DOT;
1593	33504	break;
1594
1595		case ':':
1596		#if JS_HAS_XML_SUPPORT
1597	0	if (MatchChar(ts, c)) {
1598	0	tt = TOK_DBLCOLON;
1599	0	break;
1600		}
1601		#endif
1602		/*
1603		* Default so compiler can modify to JSOP_GETTER if 'p getter: v' in an
1604		* object initializer, likewise for setter.
1605		*/
1606	0	tp->t_op = JSOP_NOP;
1607	0	tt = TOK_COLON;
1608	0	break;
1609
1610		case '\|':
1611	1507	if (MatchChar(ts, c)) {
1612	1507	tt = TOK_OR;
1613	0	} else if (MatchChar(ts, '=')) {
1614	0	tp->t_op = JSOP_BITOR;
1615	0	tt = TOK_ASSIGN;
1616		} else {
1617	0	tt = TOK_BITOR;
1618		}
1619	0	break;
1620
1621		case '^':
1622	0	if (MatchChar(ts, '=')) {
1623	0	tp->t_op = JSOP_BITXOR;
1624	0	tt = TOK_ASSIGN;
1625		} else {
1626	0	tt = TOK_BITXOR;
1627		}
1628	0	break;
1629
1630		case '&':
1631	2452	if (MatchChar(ts, c)) {
1632	2452	tt = TOK_AND;
1633	0	} else if (MatchChar(ts, '=')) {
1634	0	tp->t_op = JSOP_BITAND;
1635	0	tt = TOK_ASSIGN;
1636		} else {
1637	0	tt = TOK_BITAND;
1638		}
1639	0	break;
1640
1641		case '=':
1642	27348	if (MatchChar(ts, c)) {
1643		#if JS_HAS_TRIPLE_EQOPS
1644	10548	tp->t_op = MatchChar(ts, c) ? JSOP_NEW_EQ : (JSOp)cx->jsop_eq;
1645		#else
1646		tp->t_op = cx->jsop_eq;
1647		#endif
1648	10548	tt = TOK_EQOP;
1649		} else {
1650	16800	tp->t_op = JSOP_NOP;
1651	16800	tt = TOK_ASSIGN;
1652		}
1653	16800	break;
1654
1655		case '!':
1656	4398	if (MatchChar(ts, '=')) {
1657		#if JS_HAS_TRIPLE_EQOPS
1658	3945	tp->t_op = MatchChar(ts, '=') ? JSOP_NEW_NE : (JSOp)cx->jsop_ne;
1659		#else
1660		tp->t_op = cx->jsop_ne;
1661		#endif
1662	3945	tt = TOK_EQOP;
1663		} else {
1664	453	tp->t_op = JSOP_NOT;
1665	453	tt = TOK_UNARYOP;
1666		}
1667	453	break;
1668
1669		#if JS_HAS_XML_SUPPORT
1670		case '@':
1671	0	tt = TOK_AT;
1672	0	break;
1673		#endif
1674
1675		case '<':
1676		#if JS_HAS_XML_SUPPORT
1677		/*
1678		* After much testing, it's clear that Postel's advice to protocol
1679		* designers ("be liberal in what you accept, and conservative in what
1680		* you send") invites a natural-law repercussion for JS as "protocol":
1681		*
1682		* "If you are liberal in what you accept, others will utterly fail to
1683		* be conservative in what they send."
1684		*
1685		* Which means you will get <!-- comments to end of line in the middle
1686		* of .js files, and after if conditions whose then statements are on
1687		* the next line, and other wonders. See at least the following bugs:
1688		* https://bugzilla.mozilla.org/show_bug.cgi?id=309242
1689		* https://bugzilla.mozilla.org/show_bug.cgi?id=309712
1690		* https://bugzilla.mozilla.org/show_bug.cgi?id=310993
1691		*
1692		* So without JSOPTION_XML, we never scan an XML comment or CDATA
1693		* literal. We always scan <! as the start of an HTML comment hack
1694		* to end of line, used since Netscape 2 to hide script tag content
1695		* from script-unaware browsers.
1696		*/
1697	128	if ((ts->flags & TSF_OPERAND) &&
1698		(JS_HAS_XML_OPTION(cx) \|\| PeekChar(ts) != '!')) {
1699		/* Check for XML comment or CDATA section. */
1700	0	if (MatchChar(ts, '!')) {
1701	0	INIT_TOKENBUF();
1702
1703		/* Scan XML comment. */
1704	0	if (MatchChar(ts, '-')) {
1705	0	if (!MatchChar(ts, '-'))
1706	0	goto bad_xml_markup;
1707	0	while ((c = GetChar(ts)) != '-' \|\| !MatchChar(ts, '-')) {
1708	0	if (c == EOF)
1709	0	goto bad_xml_markup;
1710	0	ADD_TO_TOKENBUF(c);
1711		}
1712	0	tt = TOK_XMLCOMMENT;
1713	0	tp->t_op = JSOP_XMLCOMMENT;
1714	0	goto finish_xml_markup;
1715		}
1716
1717		/* Scan CDATA section. */
1718	0	if (MatchChar(ts, '[')) {
1719	0	jschar cp[6];
1720	0	if (PeekChars(ts, 6, cp) &&
1721		cp[0] == 'C' &&
1722		cp[1] == 'D' &&
1723		cp[2] == 'A' &&
1724		cp[3] == 'T' &&
1725		cp[4] == 'A' &&
1726		cp[5] == '[') {
1727	0	SkipChars(ts, 6);
1728	0	while ((c = GetChar(ts)) != ']' \|\|
1729		!PeekChars(ts, 2, cp) \|\|
1730		cp[0] != ']' \|\|
1731		cp[1] != '>') {
1732	0	if (c == EOF)
1733	0	goto bad_xml_markup;
1734	0	ADD_TO_TOKENBUF(c);
1735		}
1736	0	GetChar(ts); /* discard ] but not > */
1737	0	tt = TOK_XMLCDATA;
1738	0	tp->t_op = JSOP_XMLCDATA;
1739	0	goto finish_xml_markup;
1740		}
1741	0	goto bad_xml_markup;
1742		}
1743		}
1744
1745		/* Check for processing instruction. */
1746	0	if (MatchChar(ts, '?')) {
1747	0	JSBool inTarget = JS_TRUE;
1748	0	size_t targetLength = 0;
1749	0	ptrdiff_t contentIndex = -1;
1750
1751	0	INIT_TOKENBUF();
1752	0	while ((c = GetChar(ts)) != '?' \|\| PeekChar(ts) != '>') {
1753	0	if (c == EOF)
1754	0	goto bad_xml_markup;
1755	0	if (inTarget) {
1756	0	if (JS_ISXMLSPACE(c)) {
1757	0	if (TOKENBUF_LENGTH() == 0)
1758	0	goto bad_xml_markup;
1759	0	inTarget = JS_FALSE;
1760		} else {
1761	0	if (!((TOKENBUF_LENGTH() == 0)
1762		? JS_ISXMLNSSTART(c)
1763		: JS_ISXMLNS(c))) {
1764	0	goto bad_xml_markup;
1765		}
1766	0	++targetLength;
1767		}
1768		} else {
1769	0	if (contentIndex < 0 && !JS_ISXMLSPACE(c))
1770	0	contentIndex = TOKENBUF_LENGTH();
1771		}
1772	0	ADD_TO_TOKENBUF(c);
1773		}
1774	0	if (contentIndex < 0) {
1775	0	atom = cx->runtime->atomState.emptyAtom;
1776		} else {
1777	0	if (!TOKENBUF_OK())
1778	0	goto error;
1779	0	atom = js_AtomizeChars(cx,
1780		&TOKENBUF_CHAR(contentIndex),
1781		TOKENBUF_LENGTH() - contentIndex,
1782		0);
1783	0	if (!atom)
1784	0	goto error;
1785	0	TRIM_TOKENBUF(targetLength);
1786		}
1787	0	tp->t_atom2 = atom;
1788	0	tt = TOK_XMLPI;
1789
1790		finish_xml_markup:
1791	0	if (!MatchChar(ts, '>'))
1792	0	goto bad_xml_markup;
1793	0	atom = TOKENBUF_TO_ATOM();
1794	0	if (!atom)
1795	0	goto error;
1796	0	tp->t_atom = atom;
1797	0	tp->pos.end.lineno = (uint16)ts->lineno;
1798	0	goto out;
1799		}
1800
1801		/* An XML start-of-tag character. */
1802	0	tt = MatchChar(ts, '/') ? TOK_XMLETAGO : TOK_XMLSTAGO;
1803	0	goto out;
1804
1805		bad_xml_markup:
1806	0	js_ReportCompileErrorNumber(cx, ts, JSREPORT_TS \| JSREPORT_ERROR,
1807		JSMSG_BAD_XML_MARKUP);
1808	0	goto error;
1809		}
1810		#endif /* JS_HAS_XML_SUPPORT */
1811
1812		/* NB: treat HTML begin-comment as comment-till-end-of-line */
1813	128	if (MatchChar(ts, '!')) {
1814	0	if (MatchChar(ts, '-')) {
1815	0	if (MatchChar(ts, '-')) {
1816	0	ts->flags \|= TSF_IN_HTML_COMMENT;
1817	0	goto skipline;
1818		}
1819	0	UngetChar(ts, '-');
1820		}
1821	0	UngetChar(ts, '!');
1822		}
1823	128	if (MatchChar(ts, c)) {
1824	0	tp->t_op = JSOP_LSH;
1825	0	tt = MatchChar(ts, '=') ? TOK_ASSIGN : TOK_SHOP;
1826		} else {
1827	128	tp->t_op = MatchChar(ts, '=') ? JSOP_LE : JSOP_LT;
1828	128	tt = TOK_RELOP;
1829		}
1830	128	break;
1831
1832		case '>':
1833	128	if (MatchChar(ts, c)) {
1834	0	tp->t_op = MatchChar(ts, c) ? JSOP_URSH : JSOP_RSH;
1835	0	tt = MatchChar(ts, '=') ? TOK_ASSIGN : TOK_SHOP;
1836		} else {
1837	128	tp->t_op = MatchChar(ts, '=') ? JSOP_GE : JSOP_GT;
1838	128	tt = TOK_RELOP;
1839		}
1840	128	break;
1841
1842		case '*':
1843	0	tp->t_op = JSOP_MUL;
1844	0	tt = MatchChar(ts, '=') ? TOK_ASSIGN : TOK_STAR;
1845	0	break;
1846
1847		case '/':
1848	1088	if (MatchChar(ts, '/')) {
1849		/*
1850		* Hack for source filters such as the Mozilla XUL preprocessor:
1851		* "//@line 123\n" sets the number of the next line after the
1852		* comment to 123.
1853		*/
1854	0	if (JS_HAS_ATLINE_OPTION(cx)) {
1855	0	jschar cp[5];
1856	0	uintN i, line, temp;
1857	0	char filename[1024];
1858
1859	0	if (PeekChars(ts, 5, cp) &&
1860		cp[0] == '@' &&
1861		cp[1] == 'l' &&
1862		cp[2] == 'i' &&
1863		cp[3] == 'n' &&
1864		cp[4] == 'e') {
1865	0	SkipChars(ts, 5);
1866	0	while ((c = GetChar(ts)) != '\n' && JS_ISSPACE(c))
1867	0	continue;
1868	0	if (JS7_ISDEC(c)) {
1869	0	line = JS7_UNDEC(c);
1870	0	while ((c = GetChar(ts)) != EOF && JS7_ISDEC(c)) {
1871	0	temp = 10 * line + JS7_UNDEC(c);
1872	0	if (temp < line) {
1873		/* Ignore overlarge line numbers. */
1874	0	goto skipline;
1875		}
1876	0	line = temp;
1877		}
1878	0	while (c != '\n' && JS_ISSPACE(c))
1879	0	c = GetChar(ts);
1880	0	i = 0;
1881	0	if (c == '"') {
1882	0	while ((c = GetChar(ts)) != EOF && c != '"') {
1883	0	if (c == '\n') {
1884	0	UngetChar(ts, c);
1885	0	goto skipline;
1886		}
1887	0	if ((c >> 8) != 0 \|\| i >= sizeof filename - 1)
1888	0	goto skipline;
1889	0	filename[i++] = (char) c;
1890		}
1891	0	if (c == '"') {
1892	0	while ((c = GetChar(ts)) != '\n' &&
1893		JS_ISSPACE(c)) {
1894	0	continue;
1895		}
1896		}
1897		}
1898	0	filename[i] = '\0';
1899	0	if (c == '\n') {
1900	0	if (i > 0) {
1901	0	if (ts->flags & TSF_OWNFILENAME)
1902	0	JS_free(cx, (void *) ts->filename);
1903	0	ts->filename = JS_strdup(cx, filename);
1904	0	if (!ts->filename)
1905	0	goto error;
1906	0	ts->flags \|= TSF_OWNFILENAME;
1907		}
1908	0	ts->lineno = line;
1909		}
1910		}
1911	0	UngetChar(ts, c);
1912		}
1913		}
1914
1915		skipline:
1916		/* Optimize line skipping if we are not in an HTML comment. */
1917	0	if (ts->flags & TSF_IN_HTML_COMMENT) {
1918	0	while ((c = GetChar(ts)) != EOF && c != '\n') {
1919	0	if (c == '-' && MatchChar(ts, '-') && MatchChar(ts, '>'))
1920	0	ts->flags &= ~TSF_IN_HTML_COMMENT;
1921		}
1922		} else {
1923	0	while ((c = GetChar(ts)) != EOF && c != '\n')
1924	0	continue;
1925		}
1926	0	UngetChar(ts, c);
1927	0	ts->cursor = (ts->cursor - 1) & NTOKENS_MASK;
1928	0	goto retry;
1929		}
1930
1931	1088	if (MatchChar(ts, '*')) {
1932	39328	while ((c = GetChar(ts)) != EOF &&
1933		!(c == '*' && MatchChar(ts, '/'))) {
1934		/* Ignore all characters until comment close. */
1935		}
1936	704	if (c == EOF) {
1937	0	js_ReportCompileErrorNumber(cx, ts,
1938		JSREPORT_TS \| JSREPORT_ERROR,
1939		JSMSG_UNTERMINATED_COMMENT);
1940	0	goto error;
1941		}
1942	704	ts->cursor = (ts->cursor - 1) & NTOKENS_MASK;
1943	704	goto retry;
1944		}
1945
1946		#if JS_HAS_REGEXPS
1947	384	if (ts->flags & TSF_OPERAND) {
1948	384	JSObject *obj;
1949	384	uintN flags;
1950	384	JSBool inCharClass = JS_FALSE;
1951
1952	384	INIT_TOKENBUF();
1953	10176	for (;;) {
1954	5280	c = GetChar(ts);
1955	5280	if (c == '\n' \|\| c == EOF) {
1956	0	UngetChar(ts, c);
1957	0	js_ReportCompileErrorNumber(cx, ts,
1958		JSREPORT_TS \| JSREPORT_ERROR,
1959		JSMSG_UNTERMINATED_REGEXP);
1960	0	goto error;
1961		}
1962	5280	if (c == '\\') {
1963	352	ADD_TO_TOKENBUF(c);
1964	352	c = GetChar(ts);
1965	4928	} else if (c == '[') {
1966	0	inCharClass = JS_TRUE;
1967	4928	} else if (c == ']') {
1968	0	inCharClass = JS_FALSE;
1969	4928	} else if (c == '/' && !inCharClass) {
1970		/* For compat with IE, allow unescaped / in char classes. */
1971	384	break;
1972		}
1973	4896	ADD_TO_TOKENBUF(c);
1974		}
1975	768	for (flags = 0; ; ) {
1976	384	if (MatchChar(ts, 'g'))
1977	0	flags \|= JSREG_GLOB;
1978	384	else if (MatchChar(ts, 'i'))
1979	0	flags \|= JSREG_FOLD;
1980	384	else if (MatchChar(ts, 'm'))
1981	0	flags \|= JSREG_MULTILINE;
1982		else
1983	384	break;
1984		}
1985	384	c = PeekChar(ts);
1986	384	if (JS7_ISLET(c)) {
1987	0	tp->ptr = ts->linebuf.ptr - 1;
1988	0	js_ReportCompileErrorNumber(cx, ts,
1989		JSREPORT_TS \| JSREPORT_ERROR,
1990		JSMSG_BAD_REGEXP_FLAG);
1991	0	(void) GetChar(ts);
1992	0	goto error;
1993		}
1994		/* XXXbe fix jsregexp.c so it doesn't depend on NUL termination */
1995	384	if (!TOKENBUF_OK())
1996	0	goto error;
1997	384	NUL_TERM_TOKENBUF();
1998	384	obj = js_NewRegExpObject(cx, ts,
1999		TOKENBUF_BASE(),
2000		TOKENBUF_LENGTH(),
2001		flags);
2002	384	if (!obj)
2003	0	goto error;
2004	384	atom = js_AtomizeObject(cx, obj, 0);
2005	384	if (!atom)
2006	0	goto error;
2007
2008		/*
2009		* If the regexp's script is one-shot, we can avoid the extra
2010		* fork-on-exec costs of JSOP_REGEXP by selecting JSOP_OBJECT.
2011		* Otherwise, to avoid incorrect proto, parent, and lastIndex
2012		* sharing among threads and sequentially across re-execution,
2013		* select JSOP_REGEXP.
2014		*/
2015	384	tp->t_op = (cx->fp->flags & (JSFRAME_EVAL \| JSFRAME_COMPILE_N_GO))
2016		? JSOP_OBJECT
2017		: JSOP_REGEXP;
2018	384	tp->t_atom = atom;
2019	384	tt = TOK_OBJECT;
2020	384	break;
2021		}
2022		#endif /* JS_HAS_REGEXPS */
2023
2024	0	tp->t_op = JSOP_DIV;
2025	0	tt = MatchChar(ts, '=') ? TOK_ASSIGN : TOK_DIVOP;
2026	0	break;
2027
2028		case '%':
2029	0	tp->t_op = JSOP_MOD;
2030	0	tt = MatchChar(ts, '=') ? TOK_ASSIGN : TOK_DIVOP;
2031	0	break;
2032
2033		case '~':
2034	0	tp->t_op = JSOP_BITNOT;
2035	0	tt = TOK_UNARYOP;
2036	0	break;
2037
2038		case '+':
2039	8035	if (MatchChar(ts, '=')) {
2040	16	tp->t_op = JSOP_ADD;
2041	16	tt = TOK_ASSIGN;
2042	8019	} else if (MatchChar(ts, c)) {
2043	384	tt = TOK_INC;
2044		} else {
2045	7635	tp->t_op = JSOP_POS;
2046	7635	tt = TOK_PLUS;
2047		}
2048	7635	break;
2049
2050		case '-':
2051	627	if (MatchChar(ts, '=')) {
2052	0	tp->t_op = JSOP_SUB;
2053	0	tt = TOK_ASSIGN;
2054	627	} else if (MatchChar(ts, c)) {
2055	32	if (PeekChar(ts) == '>' && !(ts->flags & TSF_DIRTYLINE)) {
2056	0	ts->flags &= ~TSF_IN_HTML_COMMENT;
2057	0	goto skipline;
2058		}
2059	32	tt = TOK_DEC;
2060		} else {
2061	595	tp->t_op = JSOP_NEG;
2062	595	tt = TOK_MINUS;
2063		}
2064	595	break;
2065
2066		#if JS_HAS_SHARP_VARS
2067		case '#':
2068		{
2069	0	uint32 n;
2070
2071	0	c = GetChar(ts);
2072	0	if (!JS7_ISDEC(c)) {
2073	0	UngetChar(ts, c);
2074	0	goto badchar;
2075		}
2076	0	n = (uint32)JS7_UNDEC(c);
2077	0	for (;;) {
2078	0	c = GetChar(ts);
2079	0	if (!JS7_ISDEC(c))
2080	0	break;
2081	0	n = 10 * n + JS7_UNDEC(c);
2082	0	if (n >= ATOM_INDEX_LIMIT) {
2083	0	js_ReportCompileErrorNumber(cx, ts,
2084		JSREPORT_TS \| JSREPORT_ERROR,
2085		JSMSG_SHARPVAR_TOO_BIG);
2086	0	goto error;
2087		}
2088		}
2089	0	tp->t_dval = (jsdouble) n;
2090	0	if (JS_HAS_STRICT_OPTION(cx) &&
2091		(c == '=' \|\| c == '#')) {
2092	0	char buf[20];
2093	0	JS_snprintf(buf, sizeof buf, "#%u%c", n, c);
2094	0	if (!js_ReportCompileErrorNumber(cx, ts,
2095		JSREPORT_TS \|
2096		JSREPORT_WARNING \|
2097		JSREPORT_STRICT,
2098		JSMSG_DEPRECATED_USAGE,
2099		buf)) {
2100	0	goto error;
2101		}
2102		}
2103	0	if (c == '=')
2104	0	tt = TOK_DEFSHARP;
2105	0	else if (c == '#')
2106	0	tt = TOK_USESHARP;
2107		else
2108	0	goto badchar;
2109	0	break;
2110		}
2111		#endif /* JS_HAS_SHARP_VARS */
2112
2113		#if JS_HAS_SHARP_VARS \|\| JS_HAS_XML_SUPPORT
2114		badchar:
2115		#endif
2116
2117		default:
2118	0	js_ReportCompileErrorNumber(cx, ts, JSREPORT_TS \| JSREPORT_ERROR,
2119		JSMSG_ILLEGAL_CHARACTER);
2120	0	goto error;
2121		}
2122
2123		out:
2124	1788369	JS_ASSERT(tt != TOK_EOL);
2125	1788369	ts->flags \|= TSF_DIRTYLINE;
2126
2127		eol_out:
2128	1788369	if (!STRING_BUFFER_OK(&ts->tokenbuf))
2129	0	tt = TOK_ERROR;
2130	1788369	JS_ASSERT(tt < TOK_LIMIT);
2131	1788369	tp->pos.end.index = ts->linepos +
2132		PTRDIFF(ts->linebuf.ptr, ts->linebuf.base, jschar) -
2133		ts->ungetpos;
2134	1788369	tp->type = tt;
2135	1788369	return tt;
2136
2137		error:
2138	0	tt = TOK_ERROR;
2139	0	ts->flags \|= TSF_ERROR;
2140	0	goto out;
2141
2142		#undef INIT_TOKENBUF
2143		#undef TOKENBUF_LENGTH
2144		#undef TOKENBUF_OK
2145		#undef TOKENBUF_TO_ATOM
2146		#undef ADD_TO_TOKENBUF
2147		#undef TOKENBUF_BASE
2148		#undef TOKENBUF_CHAR
2149		#undef TRIM_TOKENBUF
2150		#undef NUL_TERM_TOKENBUF
2151		}
2152
2153		void
2154		js_UngetToken(JSTokenStream *ts)
2155	13163905	{
2156	13163905	JS_ASSERT(ts->lookahead < NTOKENS_MASK);
2157	13163905	if (ts->flags & TSF_ERROR)
2158	0	return;
2159	13163905	ts->lookahead++;
2160	13163905	ts->cursor = (ts->cursor - 1) & NTOKENS_MASK;
2161		}
2162
2163		JSBool
2164		js_MatchToken(JSContext cx, JSTokenStream ts, JSTokenType tt)
2165	11068968	{
2166	11068968	if (js_GetToken(cx, ts) == tt)
2167	367065	return JS_TRUE;
2168	10701903	js_UngetToken(ts);
2169	10701903	return JS_FALSE;