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jsscan.cpp
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jsscan.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set sw=4 ts=8 et tw=78:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* JS lexical scanner.
*/
#include <stdio.h> /* first to avoid trouble on some systems */
#include <errno.h>
#include <limits.h>
#include <math.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "jstypes.h"
#include "jsstdint.h"
#include "jsarena.h" /* Added by JSIFY */
#include "jsbit.h"
#include "jsutil.h" /* Added by JSIFY */
#include "jsdtoa.h"
#include "jsprf.h"
#include "jsapi.h"
#include "jsatom.h"
#include "jscntxt.h"
#include "jsversion.h"
#include "jsemit.h"
#include "jsexn.h"
#include "jsnum.h"
#include "jsopcode.h"
#include "jsparse.h"
#include "jsregexp.h"
#include "jsscan.h"
#include "jsscript.h"
#include "jsstaticcheck.h"
#include "jsvector.h"
#if JS_HAS_XML_SUPPORT
#include "jsxml.h"
#endif
using namespace js;
#define JS_KEYWORD(keyword, type, op, version) \
const char js_##keyword##_str[] = #keyword;
#include "jskeyword.tbl"
#undef JS_KEYWORD
struct keyword {
const char *chars; /* C string with keyword text */
TokenKind tokentype;
JSOp op; /* JSOp */
JSVersion version; /* JSVersion */
};
static const struct keyword keyword_defs[] = {
#define JS_KEYWORD(keyword, type, op, version) \
{js_##keyword##_str, type, op, version},
#include "jskeyword.tbl"
#undef JS_KEYWORD
};
#define KEYWORD_COUNT JS_ARRAY_LENGTH(keyword_defs)
static const struct keyword *
FindKeyword(const jschar *s, size_t length)
{
register size_t i;
const struct keyword *kw;
const char *chars;
JS_ASSERT(length != 0);
#define JSKW_LENGTH() length
#define JSKW_AT(column) s[column]
#define JSKW_GOT_MATCH(index) i = (index); goto got_match;
#define JSKW_TEST_GUESS(index) i = (index); goto test_guess;
#define JSKW_NO_MATCH() goto no_match;
#include "jsautokw.h"
#undef JSKW_NO_MATCH
#undef JSKW_TEST_GUESS
#undef JSKW_GOT_MATCH
#undef JSKW_AT
#undef JSKW_LENGTH
got_match:
return &keyword_defs[i];
test_guess:
kw = &keyword_defs[i];
chars = kw->chars;
do {
if (*s++ != (unsigned char)(*chars++))
goto no_match;
} while (--length != 0);
return kw;
no_match:
return NULL;
}
TokenKind
js_CheckKeyword(const jschar *str, size_t length)
{
const struct keyword *kw;
JS_ASSERT(length != 0);
kw = FindKeyword(str, length);
return kw ? kw->tokentype : TOK_EOF;
}
JSBool
js_IsIdentifier(JSString *str)
{
size_t length;
jschar c;
const jschar *chars, *end;
str->getCharsAndLength(chars, length);
if (length == 0)
return JS_FALSE;
c = *chars;
if (!JS_ISIDSTART(c))
return JS_FALSE;
end = chars + length;
while (++chars != end) {
c = *chars;
if (!JS_ISIDENT(c))
return JS_FALSE;
}
return JS_TRUE;
}
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable:4351)
#endif
/* Initialize members that aren't initialized in |init|. */
TokenStream::TokenStream(JSContext *cx)
: cx(cx), tokens(), cursor(), lookahead(), ungetpos(), ungetbuf(), flags(),
linelen(), linepos(), file(), listenerTSData(), saveEOL(), tokenbuf(cx)
{}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
bool
TokenStream::init(const jschar *base, size_t length, FILE *fp, const char *fn, uintN ln)
{
jschar *buf;
JS_ASSERT_IF(fp, !base);
JS_ASSERT_IF(!base, length == 0);
size_t nb = fp
? 2 * LINE_LIMIT * sizeof(jschar)
: LINE_LIMIT * sizeof(jschar);
JS_ARENA_ALLOCATE_CAST(buf, jschar *, &cx->tempPool, nb);
if (!buf) {
js_ReportOutOfScriptQuota(cx);
return false;
}
memset(buf, 0, nb);
/* Initialize members. */
filename = fn;
lineno = ln;
linebuf.base = linebuf.limit = linebuf.ptr = buf;
if (fp) {
file = fp;
userbuf.base = buf + LINE_LIMIT;
userbuf.ptr = userbuf.limit = userbuf.base + LINE_LIMIT;
} else {
userbuf.base = (jschar *)base;
userbuf.limit = (jschar *)base + length;
userbuf.ptr = (jschar *)base;
}
listener = cx->debugHooks->sourceHandler;
listenerData = cx->debugHooks->sourceHandlerData;
return true;
}
void
TokenStream::close()
{
if (flags & TSF_OWNFILENAME)
cx->free((void *) filename);
}
/* Use the fastest available getc. */
#if defined(HAVE_GETC_UNLOCKED)
# define fast_getc getc_unlocked
#elif defined(HAVE__GETC_NOLOCK)
# define fast_getc _getc_nolock
#else
# define fast_getc getc
#endif
JS_FRIEND_API(int)
js_fgets(char *buf, int size, FILE *file)
{
int n, i, c;
JSBool crflag;
n = size - 1;
if (n < 0)
return -1;
crflag = JS_FALSE;
for (i = 0; i < n && (c = fast_getc(file)) != EOF; i++) {
buf[i] = c;
if (c == '\n') { /* any \n ends a line */
i++; /* keep the \n; we know there is room for \0 */
break;
}
if (crflag) { /* \r not followed by \n ends line at the \r */
ungetc(c, file);
break; /* and overwrite c in buf with \0 */
}
crflag = (c == '\r');
}
buf[i] = '\0';
return i;
}
int32
TokenStream::getChar()
{
int32 c;
ptrdiff_t i, j, len, olen;
JSBool crflag;
char cbuf[LINE_LIMIT];
jschar *ubuf, *nl;
if (ungetpos != 0) {
c = ungetbuf[--ungetpos];
} else {
if (linebuf.ptr == linebuf.limit) {
len = userbuf.limit - userbuf.ptr;
if (len <= 0) {
if (!file) {
flags |= TSF_EOF;
return EOF;
}
/* Fill userbuf so that \r and \r\n convert to \n. */
crflag = (flags & TSF_CRFLAG) != 0;
len = js_fgets(cbuf, LINE_LIMIT - crflag, file);
if (len <= 0) {
flags |= TSF_EOF;
return EOF;
}
olen = len;
ubuf = userbuf.base;
i = 0;
if (crflag) {
flags &= ~TSF_CRFLAG;
if (cbuf[0] != '\n') {
ubuf[i++] = '\n';
len++;
linepos--;
}
}
for (j = 0; i < len; i++, j++)
ubuf[i] = (jschar) (unsigned char) cbuf[j];
userbuf.limit = ubuf + len;
userbuf.ptr = ubuf;
}
if (listener)
listener(filename, lineno, userbuf.ptr, len, &listenerTSData, listenerData);
nl = saveEOL;
if (!nl) {
/*
* Any one of \n, \r, or \r\n ends a line (the longest
* match wins). Also allow the Unicode line and paragraph
* separators.
*/
for (nl = userbuf.ptr; nl < userbuf.limit; nl++) {
/*
* Try to prevent value-testing on most characters by
* filtering out characters that aren't 000x or 202x.
*/
if ((*nl & 0xDFD0) == 0) {
if (*nl == '\n')
break;
if (*nl == '\r') {
if (nl + 1 < userbuf.limit && nl[1] == '\n')
nl++;
break;
}
if (*nl == LINE_SEPARATOR || *nl == PARA_SEPARATOR)
break;
}
}
}
/*
* If there was a line terminator, copy thru it into linebuf.
* Else copy LINE_LIMIT-1 bytes into linebuf.
*/
if (nl < userbuf.limit)
len = (nl - userbuf.ptr) + 1;
if (len >= (ptrdiff_t) LINE_LIMIT) {
len = LINE_LIMIT - 1;
saveEOL = nl;
} else {
saveEOL = NULL;
}
js_strncpy(linebuf.base, userbuf.ptr, len);
userbuf.ptr += len;
olen = len;
/*
* Make sure linebuf contains \n for EOL (don't do this in
* userbuf because the user's string might be readonly).
*/
if (nl < userbuf.limit) {
if (*nl == '\r') {
if (linebuf.base[len-1] == '\r') {
/*
* Does the line segment end in \r? We must check
* for a \n at the front of the next segment before
* storing a \n into linebuf. This case matters
* only when we're reading from a file.
*/
if (nl + 1 == userbuf.limit && file) {
len--;
flags |= TSF_CRFLAG; /* clear NLFLAG? */
if (len == 0) {
/*
* This can happen when a segment ends in
* \r\r. Start over. ptr == limit in this
* case, so we'll fall into buffer-filling
* code.
*/
return getChar();
}
} else {
linebuf.base[len-1] = '\n';
}
}
} else if (*nl == '\n') {
if (nl > userbuf.base &&
nl[-1] == '\r' &&
linebuf.base[len-2] == '\r') {
len--;
JS_ASSERT(linebuf.base[len] == '\n');
linebuf.base[len-1] = '\n';
}
} else if (*nl == LINE_SEPARATOR || *nl == PARA_SEPARATOR) {
linebuf.base[len-1] = '\n';
}
}
/* Reset linebuf based on adjusted segment length. */
linebuf.limit = linebuf.base + len;
linebuf.ptr = linebuf.base;
/* Update position of linebuf within physical userbuf line. */
if (!(flags & TSF_NLFLAG))
linepos += linelen;
else
linepos = 0;
if (linebuf.limit[-1] == '\n')
flags |= TSF_NLFLAG;
else
flags &= ~TSF_NLFLAG;
/* Update linelen from original segment length. */
linelen = olen;
}
c = *linebuf.ptr++;
}
if (c == '\n')
lineno++;
return c;
}
void
TokenStream::ungetChar(int32 c)
{
if (c == EOF)
return;
JS_ASSERT(ungetpos < JS_ARRAY_LENGTH(ungetbuf));
if (c == '\n')
lineno--;
ungetbuf[ungetpos++] = (jschar)c;
}
/*
* Peek n chars ahead into ts. Return true if n chars were read, false if
* there weren't enough characters in the input stream. This function cannot
* be used to peek into or past a newline.
*/
JSBool
TokenStream::peekChars(intN n, jschar *cp)
{
intN i, j;
int32 c;
for (i = 0; i < n; i++) {
c = getChar();
if (c == EOF)
break;
if (c == '\n') {
ungetChar(c);
break;
}
cp[i] = (jschar)c;
}
for (j = i - 1; j >= 0; j--)
ungetChar(cp[j]);
return i == n;
}
bool
TokenStream::reportCompileErrorNumberVA(JSParseNode *pn, uintN flags, uintN errorNumber,
va_list ap)
{
JSErrorReport report;
char *message;
size_t linelength;
jschar *linechars;
char *linebytes;
bool warning;
JSBool ok;
TokenPos *tp;
uintN index, i;
JSErrorReporter onError;
JS_ASSERT(linebuf.limit < linebuf.base + LINE_LIMIT);
if (JSREPORT_IS_STRICT(flags) && !JS_HAS_STRICT_OPTION(cx))
return JS_TRUE;
warning = JSREPORT_IS_WARNING(flags);
if (warning && JS_HAS_WERROR_OPTION(cx)) {
flags &= ~JSREPORT_WARNING;
warning = false;
}
PodZero(&report);
report.flags = flags;
report.errorNumber = errorNumber;
message = NULL;
linechars = NULL;
linebytes = NULL;
MUST_FLOW_THROUGH("out");
ok = js_ExpandErrorArguments(cx, js_GetErrorMessage, NULL,
errorNumber, &message, &report,
!(flags & JSREPORT_UC), ap);
if (!ok) {
warning = false;
goto out;
}
report.filename = filename;
if (pn) {
report.lineno = pn->pn_pos.begin.lineno;
if (report.lineno != lineno)
goto report;
tp = &pn->pn_pos;
} else {
/* Point to the current token, not the next one to get. */
tp = &tokens[cursor].pos;
}
report.lineno = lineno;
linelength = linebuf.limit - linebuf.base;
linechars = (jschar *)cx->malloc((linelength + 1) * sizeof(jschar));
if (!linechars) {
warning = false;
goto out;
}
memcpy(linechars, linebuf.base, linelength * sizeof(jschar));
linechars[linelength] = 0;
linebytes = js_DeflateString(cx, linechars, linelength);
if (!linebytes) {
warning = false;
goto out;
}
report.linebuf = linebytes;
/*
* FIXME: What should instead happen here is that we should
* find error-tokens in userbuf, if !file. That will
* allow us to deliver a more helpful error message, which
* includes all or part of the bad string or bad token. The
* code here yields something that looks truncated.
* See https://bugzilla.mozilla.org/show_bug.cgi?id=352970
*/
index = 0;
if (tp->begin.lineno == tp->end.lineno) {
if (tp->begin.index < linepos)
goto report;
index = tp->begin.index - linepos;
}
report.tokenptr = report.linebuf + index;
report.uclinebuf = linechars;
report.uctokenptr = report.uclinebuf + index;
/*
* If there's a runtime exception type associated with this error
* number, set that as the pending exception. For errors occuring at
* compile time, this is very likely to be a JSEXN_SYNTAXERR.
*
* If an exception is thrown but not caught, the JSREPORT_EXCEPTION
* flag will be set in report.flags. Proper behavior for an error
* reporter is to ignore a report with this flag for all but top-level
* compilation errors. The exception will remain pending, and so long
* as the non-top-level "load", "eval", or "compile" native function
* returns false, the top-level reporter will eventually receive the
* uncaught exception report.
*
* XXX it'd probably be best if there was only one call to this
* function, but there seem to be two error reporter call points.
*/
report:
onError = cx->errorReporter;
/*
* Try to raise an exception only if there isn't one already set --
* otherwise the exception will describe the last compile-time error,
* which is likely spurious.
*/
if (!(flags & TSF_ERROR)) {
if (js_ErrorToException(cx, message, &report, NULL, NULL))
onError = NULL;
}
/*
* Suppress any compile-time errors that don't occur at the top level.
* This may still fail, as interplevel may be zero in contexts where we
* don't really want to call the error reporter, as when js is called
* by other code which could catch the error.
*/
if (cx->interpLevel != 0 && !JSREPORT_IS_WARNING(flags))
onError = NULL;
if (onError) {
JSDebugErrorHook hook = cx->debugHooks->debugErrorHook;
/*
* If debugErrorHook is present then we give it a chance to veto
* sending the error on to the regular error reporter.
*/
if (hook && !hook(cx, message, &report,
cx->debugHooks->debugErrorHookData)) {
onError = NULL;
}
}
if (onError)
(*onError)(cx, message, &report);
out:
if (linebytes)
cx->free(linebytes);
if (linechars)
cx->free(linechars);
if (message)
cx->free(message);
if (report.ucmessage)
cx->free((void *)report.ucmessage);
if (report.messageArgs) {
if (!(flags & JSREPORT_UC)) {
i = 0;
while (report.messageArgs[i])
cx->free((void *)report.messageArgs[i++]);
}
cx->free((void *)report.messageArgs);
}
if (!JSREPORT_IS_WARNING(flags)) {
/* Set the error flag to suppress spurious reports. */
flags |= TSF_ERROR;
}
return warning;
}
bool
js::ReportStrictModeError(JSContext *cx, TokenStream *ts, JSTreeContext *tc, JSParseNode *pn,
uintN errorNumber, ...)
{
JS_ASSERT(ts || tc);
JS_ASSERT(cx == ts->getContext());
/* In strict mode code, this is an error, not just a warning. */
uintN flags;
if ((tc && tc->flags & TCF_STRICT_MODE_CODE) || (ts && ts->isStrictMode()))
flags = JSREPORT_ERROR;
else if (JS_HAS_STRICT_OPTION(cx))
flags = JSREPORT_WARNING;
else
return true;
va_list ap;
va_start(ap, errorNumber);
bool result = ts->reportCompileErrorNumberVA(pn, flags, errorNumber, ap);
va_end(ap);
return result;
}
bool
js::ReportCompileErrorNumber(JSContext *cx, TokenStream *ts, JSParseNode *pn,
uintN flags, uintN errorNumber, ...)
{
va_list ap;
/*
* We don't accept a JSTreeContext argument, so we can't implement
* JSREPORT_STRICT_MODE_ERROR here. Use ReportStrictModeError instead,
* or do the checks in the caller and pass plain old JSREPORT_ERROR.
*/
JS_ASSERT(!(flags & JSREPORT_STRICT_MODE_ERROR));
va_start(ap, errorNumber);
JS_ASSERT(cx == ts->getContext());
bool result = ts->reportCompileErrorNumberVA(pn, flags, errorNumber, ap);
va_end(ap);
return result;
}
#if JS_HAS_XML_SUPPORT
JSBool
TokenStream::getXMLEntity()
{
ptrdiff_t offset, length, i;
int c, d;
JSBool ispair;
jschar *bp, digit;
char *bytes;
JSErrNum msg;
JSCharBuffer &tb = tokenbuf;
/* Put the entity, including the '&' already scanned, in tokenbuf. */
offset = tb.length();
if (!tb.append('&'))
return JS_FALSE;
while ((c = getChar()) != ';') {
if (c == EOF || c == '\n') {
ReportCompileErrorNumber(cx, this, NULL, JSREPORT_ERROR, JSMSG_END_OF_XML_ENTITY);
return JS_FALSE;
}
if (!tb.append(c))
return JS_FALSE;
}
/* Let length be the number of jschars after the '&', including the ';'. */
length = tb.length() - offset;
bp = tb.begin() + offset;
c = d = 0;
ispair = JS_FALSE;
if (length > 2 && bp[1] == '#') {
/* Match a well-formed XML Character Reference. */
i = 2;
if (length > 3 && JS_TOLOWER(bp[i]) == 'x') {
if (length > 9) /* at most 6 hex digits allowed */
goto badncr;
while (++i < length) {
digit = bp[i];
if (!JS7_ISHEX(digit))
goto badncr;
c = (c << 4) + JS7_UNHEX(digit);
}
} else {
while (i < length) {
digit = bp[i++];
if (!JS7_ISDEC(digit))
goto badncr;
c = (c * 10) + JS7_UNDEC(digit);
if (c < 0)
goto badncr;
}
}
if (0x10000 <= c && c <= 0x10FFFF) {
/* Form a surrogate pair (c, d) -- c is the high surrogate. */
d = 0xDC00 + (c & 0x3FF);
c = 0xD7C0 + (c >> 10);
ispair = JS_TRUE;
} else {
/* Enforce the http://www.w3.org/TR/REC-xml/#wf-Legalchar WFC. */
if (c != 0x9 && c != 0xA && c != 0xD &&
!(0x20 <= c && c <= 0xD7FF) &&
!(0xE000 <= c && c <= 0xFFFD)) {
goto badncr;
}
}
} else {
/* Try to match one of the five XML 1.0 predefined entities. */
switch (length) {
case 3:
if (bp[2] == 't') {
if (bp[1] == 'l')
c = '<';
else if (bp[1] == 'g')
c = '>';
}
break;
case 4:
if (bp[1] == 'a' && bp[2] == 'm' && bp[3] == 'p')
c = '&';
break;
case 5:
if (bp[3] == 'o') {
if (bp[1] == 'a' && bp[2] == 'p' && bp[4] == 's')
c = '\'';
else if (bp[1] == 'q' && bp[2] == 'u' && bp[4] == 't')
c = '"';
}
break;
}
if (c == 0) {
msg = JSMSG_UNKNOWN_XML_ENTITY;
goto bad;
}
}
/* If we matched, retract tokenbuf and store the entity's value. */
*bp++ = (jschar) c;
if (ispair)
*bp++ = (jschar) d;
tb.shrinkBy(tb.end() - bp);
return JS_TRUE;
badncr:
msg = JSMSG_BAD_XML_NCR;
bad:
/* No match: throw a TypeError per ECMA-357 10.3.2.1 step 8(a). */
JS_ASSERT((tb.end() - bp) >= 1);
bytes = js_DeflateString(cx, bp + 1, (tb.end() - bp) - 1);
if (bytes) {
ReportCompileErrorNumber(cx, this, NULL, JSREPORT_ERROR, msg, bytes);
cx->free(bytes);
}
return JS_FALSE;
}
#endif /* JS_HAS_XML_SUPPORT */
/*
* We have encountered a '\': check for a Unicode escape sequence after it,
* returning the character code value if we found a Unicode escape sequence.
* Otherwise, non-destructively return the original '\'.
*/
int32
TokenStream::getUnicodeEscape()
{
jschar cp[5];
int32 c;
if (peekChars(5, cp) && cp[0] == 'u' &&
JS7_ISHEX(cp[1]) && JS7_ISHEX(cp[2]) &&
JS7_ISHEX(cp[3]) && JS7_ISHEX(cp[4]))
{
c = (((((JS7_UNHEX(cp[1]) << 4)
+ JS7_UNHEX(cp[2])) << 4)
+ JS7_UNHEX(cp[3])) << 4)
+ JS7_UNHEX(cp[4]);
skipChars(5);
return c;
}
return '\\';
}
Token *
TokenStream::newToken(ptrdiff_t adjust)
{
cursor = (cursor + 1) & ntokensMask;
Token *tp = &tokens[cursor];
tp->ptr = linebuf.ptr + adjust;
tp->pos.begin.index = linepos + (tp->ptr - linebuf.base) - ungetpos;
tp->pos.begin.lineno = tp->pos.end.lineno = lineno;
return tp;
}
static JS_ALWAYS_INLINE JSBool
ScanAsSpace(jschar c)
{
/* Treat little- and big-endian BOMs as whitespace for compatibility. */
if (JS_ISSPACE(c) || c == 0xfffe || c == 0xfeff)
return JS_TRUE;
return JS_FALSE;
}
static JS_ALWAYS_INLINE JSAtom *
atomize(JSContext *cx, JSCharBuffer &cb)
{
return js_AtomizeChars(cx, cb.begin(), cb.length(), 0);
}
TokenKind
TokenStream::getTokenInternal()
{
TokenKind tt;
int c, qc;
Token *tp;
JSAtom *atom;
JSBool hadUnicodeEscape;
const struct keyword *kw;
#if JS_HAS_XML_SUPPORT
JSBool inTarget;
size_t targetLength;
ptrdiff_t contentIndex;
#endif
#if JS_HAS_XML_SUPPORT
if (flags & TSF_XMLTEXTMODE) {
tt = TOK_XMLSPACE; /* veto if non-space, return TOK_XMLTEXT */
tp = newToken(0);
tokenbuf.clear();
qc = (flags & TSF_XMLONLYMODE) ? '<' : '{';
while ((c = getChar()) != qc && c != '<' && c != EOF) {
if (c == '&' && qc == '<') {
if (!getXMLEntity())
goto error;
tt = TOK_XMLTEXT;
continue;
}
if (!JS_ISXMLSPACE(c))
tt = TOK_XMLTEXT;
if (!tokenbuf.append(c))
goto error;
}
ungetChar(c);
if (tokenbuf.empty()) {
atom = NULL;
} else {
atom = atomize(cx, tokenbuf);
if (!atom)
goto error;
}
tp->pos.end.lineno = lineno;
tp->t_op = JSOP_STRING;
tp->t_atom = atom;
goto out;
}
if (flags & TSF_XMLTAGMODE) {
tp = newToken(0);
c = getChar();
if (JS_ISXMLSPACE(c)) {
do {
c = getChar();
} while (JS_ISXMLSPACE(c));
ungetChar(c);
tt = TOK_XMLSPACE;
goto out;
}
if (c == EOF) {
tt = TOK_EOF;
goto out;
}
tokenbuf.clear();
if (JS_ISXMLNSSTART(c)) {
JSBool sawColon = JS_FALSE;
if (!tokenbuf.append(c))
goto error;
while ((c = getChar()) != EOF && JS_ISXMLNAME(c)) {
if (c == ':') {
int nextc;
if (sawColon ||
(nextc = peekChar(),
((flags & TSF_XMLONLYMODE) || nextc != '{') &&
!JS_ISXMLNAME(nextc))) {
ReportCompileErrorNumber(cx, this, NULL, JSREPORT_ERROR,
JSMSG_BAD_XML_QNAME);
goto error;
}
sawColon = JS_TRUE;
}
if (!tokenbuf.append(c))
goto error;
}
ungetChar(c);
atom = atomize(cx, tokenbuf);
if (!atom)
goto error;
tp->t_op = JSOP_STRING;
tp->t_atom = atom;
tt = TOK_XMLNAME;
goto out;
}
switch (c) {
case '{':
if (flags & TSF_XMLONLYMODE)
goto bad_xml_char;
tt = TOK_LC;
goto out;
case '=':
tt = TOK_ASSIGN;
goto out;
case '"':
case '\'':
qc = c;
while ((c = getChar()) != qc) {
if (c == EOF) {
ReportCompileErrorNumber(cx, this, NULL, JSREPORT_ERROR,
JSMSG_UNTERMINATED_STRING);
goto error;
}
/*
* XML attribute values are double-quoted when pretty-printed,
* so escape " if it is expressed directly in a single-quoted
* attribute value.
*/
if (c == '"' && !(flags & TSF_XMLONLYMODE)) {
JS_ASSERT(qc == '\'');
if (!tokenbuf.append(js_quot_entity_str,
strlen(js_quot_entity_str)))
goto error;
continue;
}
if (c == '&' && (flags & TSF_XMLONLYMODE)) {
if (!getXMLEntity())
goto error;
continue;
}
if (!tokenbuf.append(c))
goto error;
}
atom = atomize(cx, tokenbuf);
if (!atom)
goto error;
tp->pos.end.lineno = lineno;
tp->t_op = JSOP_STRING;
tp->t_atom = atom;
tt = TOK_XMLATTR;
goto out;
case '>':
tt = TOK_XMLTAGC;
goto out;
case '/':