nsresult
SVGPointList::SetValueFromString(const nsAString& aValue)
{
// The spec says that the list is parsed and accepted up to the first error
// encountered, so we must call CopyFrom even if an error occurs. We still
// want to throw any error code from setAttribute if there's a problem
// though, so we must take care to return any error code.
nsresult rv = NS_OK;
SVGPointList temp;
nsCharSeparatedTokenizerTemplate<IsSVGWhitespace>
tokenizer(aValue, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);
while (tokenizer.hasMoreTokens()) {
const nsAString& token = tokenizer.nextToken();
RangedPtr<const PRUnichar> iter =
SVGContentUtils::GetStartRangedPtr(token);
const RangedPtr<const PRUnichar> end =
SVGContentUtils::GetEndRangedPtr(token);
float x;
if (!SVGContentUtils::ParseNumber(iter, end, x)) {
rv = NS_ERROR_DOM_SYNTAX_ERR;
break;
}
float y;
if (iter == end) {
if (!tokenizer.hasMoreTokens() ||
!SVGContentUtils::ParseNumber(tokenizer.nextToken(), y)) {
rv = NS_ERROR_DOM_SYNTAX_ERR;
break;
}
} else {
// It's possible for the token to be 10-30 which has
// no separator but needs to be parsed as 10, -30
const nsAString& leftOver = Substring(iter.get(), end.get());
if (leftOver[0] != '-' || !SVGContentUtils::ParseNumber(leftOver, y)) {
rv = NS_ERROR_DOM_SYNTAX_ERR;
break;
}
}
temp.AppendItem(SVGPoint(x, y));
}
if (tokenizer.separatorAfterCurrentToken()) {
rv = NS_ERROR_DOM_SYNTAX_ERR; // trailing comma
}
nsresult rv2 = CopyFrom(temp);
if (NS_FAILED(rv2)) {
return rv2; // prioritize OOM error code over syntax errors
}
return rv;
}
bool
js::IndexToIdSlow(ExclusiveContext *cx, uint32_t index, MutableHandleId idp)
{
MOZ_ASSERT(index > JSID_INT_MAX);
char16_t buf[UINT32_CHAR_BUFFER_LENGTH];
RangedPtr<char16_t> end(ArrayEnd(buf), buf, ArrayEnd(buf));
RangedPtr<char16_t> start = BackfillIndexInCharBuffer(index, end);
JSAtom *atom = AtomizeChars(cx, start.get(), end - start);
if (!atom)
return false;
idp.set(JSID_FROM_BITS((size_t)atom));
return true;
}
bool
js::IndexToIdSlow(JSContext *cx, uint32_t index,
typename MaybeRooted<jsid, allowGC>::MutableHandleType idp)
{
JS_ASSERT(index > JSID_INT_MAX);
jschar buf[UINT32_CHAR_BUFFER_LENGTH];
RangedPtr<jschar> end(ArrayEnd(buf), buf, ArrayEnd(buf));
RangedPtr<jschar> start = BackfillIndexInCharBuffer(index, end);
JSAtom *atom = AtomizeChars<allowGC>(cx, start.get(), end - start);
if (!atom)
return false;
idp.set(JSID_FROM_BITS((size_t)atom));
return true;
}
static bool
GetValueFromString(const nsAString& aString,
float& aValue,
uint16_t* aUnitType)
{
RangedPtr<const char16_t> iter =
SVGContentUtils::GetStartRangedPtr(aString);
const RangedPtr<const char16_t> end =
SVGContentUtils::GetEndRangedPtr(aString);
if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
return false;
}
const nsAString& units = Substring(iter.get(), end.get());
*aUnitType = GetUnitTypeForString(units);
return IsValidUnitType(*aUnitType);
}
bool
IndexToIdSlow(JSContext *cx, uint32 index, jsid *idp)
{
JS_ASSERT(index > JSID_INT_MAX);
jschar buf[UINT32_CHAR_BUFFER_LENGTH];
RangedPtr<jschar> end(buf + JS_ARRAY_LENGTH(buf), buf, buf + JS_ARRAY_LENGTH(buf));
RangedPtr<jschar> start = BackfillIndexInCharBuffer(index, end);
JSAtom *atom = js_AtomizeChars(cx, start.get(), end - start);
if (!atom)
return false;
*idp = ATOM_TO_JSID(atom);
JS_ASSERT(js_CheckForStringIndex(*idp) == *idp);
return true;
}
bool
SVGLength::SetValueFromString(const nsAString &aString)
{
RangedPtr<const char16_t> iter =
SVGContentUtils::GetStartRangedPtr(aString);
const RangedPtr<const char16_t> end =
SVGContentUtils::GetEndRangedPtr(aString);
float value;
if (!SVGContentUtils::ParseNumber(iter, end, value)) {
return false;
}
const nsAString& units = Substring(iter.get(), end.get());
uint16_t unitType = GetUnitTypeForString(units);
if (!IsValidUnitType(unitType)) {
return false;
}
mValue = value;
mUnit = uint8_t(unitType);
return true;
}
static bool
GetValueFromString(const nsAString& aString,
bool aPercentagesAllowed,
float& aValue)
{
RangedPtr<const char16_t> iter =
SVGContentUtils::GetStartRangedPtr(aString);
const RangedPtr<const char16_t> end =
SVGContentUtils::GetEndRangedPtr(aString);
if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
return false;
}
if (aPercentagesAllowed) {
const nsAString& units = Substring(iter.get(), end.get());
if (units.EqualsLiteral("%")) {
aValue /= 100;
return true;
}
}
return iter == end;
}
JSONParser::Token
JSONParser::readNumber()
{
JS_ASSERT(current < end);
JS_ASSERT(JS7_ISDEC(*current) || *current == '-');
/*
* JSONNumber:
* /^-?(0|[1-9][0-9]+)(\.[0-9]+)?([eE][\+\-]?[0-9]+)?$/
*/
bool negative = *current == '-';
/* -? */
if (negative && ++current == end) {
error("no number after minus sign");
return token(Error);
}
const RangedPtr<const jschar> digitStart = current;
/* 0|[1-9][0-9]+ */
if (!JS7_ISDEC(*current)) {
error("unexpected non-digit");
return token(Error);
}
if (*current++ != '0') {
for (; current < end; current++) {
if (!JS7_ISDEC(*current))
break;
}
}
/* Fast path: no fractional or exponent part. */
if (current == end || (*current != '.' && *current != 'e' && *current != 'E')) {
TwoByteChars chars(digitStart.get(), current - digitStart);
if (chars.length() < strlen("9007199254740992")) {
// If the decimal number is shorter than the length of 2**53, (the
// largest number a double can represent with integral precision),
// parse it using a decimal-only parser. This comparison is
// conservative but faster than a fully-precise check.
double d = ParseDecimalNumber(chars);
return numberToken(negative ? -d : d);
}
double d;
const jschar *dummy;
if (!GetPrefixInteger(cx, digitStart.get(), current.get(), 10, &dummy, &d))
return token(OOM);
JS_ASSERT(current == dummy);
return numberToken(negative ? -d : d);
}
/* (\.[0-9]+)? */
if (current < end && *current == '.') {
if (++current == end) {
error("missing digits after decimal point");
return token(Error);
}
if (!JS7_ISDEC(*current)) {
error("unterminated fractional number");
return token(Error);
}
while (++current < end) {
if (!JS7_ISDEC(*current))
break;
}
}
/* ([eE][\+\-]?[0-9]+)? */
if (current < end && (*current == 'e' || *current == 'E')) {
if (++current == end) {
error("missing digits after exponent indicator");
return token(Error);
}
if (*current == '+' || *current == '-') {
if (++current == end) {
error("missing digits after exponent sign");
return token(Error);
}
}
if (!JS7_ISDEC(*current)) {
error("exponent part is missing a number");
return token(Error);
}
while (++current < end) {
if (!JS7_ISDEC(*current))
break;
}
}
double d;
const jschar *finish;
if (!js_strtod(cx, digitStart.get(), current.get(), &finish, &d))
return token(OOM);
JS_ASSERT(current == finish);
return numberToken(negative ? -d : d);
}
JSONParser::Token
JSONParser::readString()
{
JS_ASSERT(current < end);
JS_ASSERT(*current == '"');
/*
* JSONString:
* /^"([^\u0000-\u001F"\\]|\\(["/\\bfnrt]|u[0-9a-fA-F]{4}))*"$/
*/
if (++current == end) {
error("unterminated string literal");
return token(Error);
}
/*
* Optimization: if the source contains no escaped characters, create the
* string directly from the source text.
*/
RangedPtr<const jschar> start = current;
for (; current < end; current++) {
if (*current == '"') {
size_t length = current - start;
current++;
JSFlatString *str = (ST == JSONParser::PropertyName)
? AtomizeChars(cx, start.get(), length)
: js_NewStringCopyN<CanGC>(cx, start.get(), length);
if (!str)
return token(OOM);
return stringToken(str);
}
if (*current == '\\')
break;
if (*current <= 0x001F) {
error("bad control character in string literal");
return token(Error);
}
}
/*
* Slow case: string contains escaped characters. Copy a maximal sequence
* of unescaped characters into a temporary buffer, then an escaped
* character, and repeat until the entire string is consumed.
*/
StringBuffer buffer(cx);
do {
if (start < current && !buffer.append(start.get(), current.get()))
return token(OOM);
if (current >= end)
break;
jschar c = *current++;
if (c == '"') {
JSFlatString *str = (ST == JSONParser::PropertyName)
? buffer.finishAtom()
: buffer.finishString();
if (!str)
return token(OOM);
return stringToken(str);
}
if (c != '\\') {
--current;
error("bad character in string literal");
return token(Error);
}
if (current >= end)
break;
switch (*current++) {
case '"': c = '"'; break;
case '/': c = '/'; break;
case '\\': c = '\\'; break;
case 'b': c = '\b'; break;
case 'f': c = '\f'; break;
case 'n': c = '\n'; break;
case 'r': c = '\r'; break;
case 't': c = '\t'; break;
case 'u':
if (end - current < 4 ||
!(JS7_ISHEX(current[0]) &&
JS7_ISHEX(current[1]) &&
JS7_ISHEX(current[2]) &&
JS7_ISHEX(current[3])))
{
// Point to the first non-hexadecimal character (which may be
// missing).
if (current == end || !JS7_ISHEX(current[0]))
; // already at correct location
else if (current + 1 == end || !JS7_ISHEX(current[1]))
current += 1;
else if (current + 2 == end || !JS7_ISHEX(current[2]))
current += 2;
else if (current + 3 == end || !JS7_ISHEX(current[3]))
current += 3;
else
MOZ_ASSUME_UNREACHABLE("logic error determining first erroneous character");
error("bad Unicode escape");
return token(Error);
}
c = (JS7_UNHEX(current[0]) << 12)
| (JS7_UNHEX(current[1]) << 8)
| (JS7_UNHEX(current[2]) << 4)
| (JS7_UNHEX(current[3]));
current += 4;
break;
default:
current--;
error("bad escaped character");
return token(Error);
}
if (!buffer.append(c))
return token(OOM);
start = current;
for (; current < end; current++) {
if (*current == '"' || *current == '\\' || *current <= 0x001F)
break;
}
} while (current < end);
error("unterminated string");
return token(Error);
}
JSONParser::Token
JSONParser::readString()
{
JS_ASSERT(current < end);
JS_ASSERT(*current == '"');
/*
* JSONString:
* /^"([^\u0000-\u001F"\\]|\\(["/\\bfnrt]|u[0-9a-fA-F]{4}))*"$/
*/
if (++current == end) {
error("unterminated string literal");
return token(Error);
}
/*
* Optimization: if the source contains no escaped characters, create the
* string directly from the source text.
*/
RangedPtr<const jschar> start = current;
for (; current < end; current++) {
if (*current == '"') {
size_t length = current - start;
current++;
JSFlatString *str = (ST == JSONParser::PropertyName)
? AtomizeChars(cx, start.get(), length)
: js_NewStringCopyN(cx, start.get(), length);
if (!str)
return token(OOM);
return stringToken(str);
}
if (*current == '\\')
break;
if (*current <= 0x001F) {
error("bad control character in string literal");
return token(Error);
}
}
/*
* Slow case: string contains escaped characters. Copy a maximal sequence
* of unescaped characters into a temporary buffer, then an escaped
* character, and repeat until the entire string is consumed.
*/
StringBuffer buffer(cx);
do {
if (start < current && !buffer.append(start.get(), current.get()))
return token(OOM);
if (current >= end)
break;
jschar c = *current++;
if (c == '"') {
UnrootedFlatString str = (ST == JSONParser::PropertyName)
? UnrootedFlatString(buffer.finishAtom())
: buffer.finishString();
if (!str)
return token(OOM);
return stringToken(str);
}
if (c != '\\') {
error("bad character in string literal");
return token(Error);
}
if (current >= end)
break;
switch (*current++) {
case '"':
c = '"';
break;
case '/':
c = '/';
break;
case '\\':
c = '\\';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'u':
if (end - current < 4) {
error("bad Unicode escape");
return token(Error);
}
if (JS7_ISHEX(current[0]) &&
JS7_ISHEX(current[1]) &&
JS7_ISHEX(current[2]) &&
JS7_ISHEX(current[3]))
{
c = (JS7_UNHEX(current[0]) << 12)
| (JS7_UNHEX(current[1]) << 8)
| (JS7_UNHEX(current[2]) << 4)
| (JS7_UNHEX(current[3]));
current += 4;
break;
}
/* FALL THROUGH */
default:
error("bad escaped character");
return token(Error);
}
if (!buffer.append(c))
return token(OOM);
start = current;
for (; current < end; current++) {
if (*current == '"' || *current == '\\' || *current <= 0x001F)
break;
}
} while (current < end);
error("unterminated string");
return token(Error);
}
JSONParser::Token
JSONParser::readNumber()
{
JS_ASSERT(current < end);
JS_ASSERT(JS7_ISDEC(*current) || *current == '-');
/*
* JSONNumber:
* /^-?(0|[1-9][0-9]+)(\.[0-9]+)?([eE][\+\-]?[0-9]+)?$/
*/
bool negative = *current == '-';
/* -? */
if (negative && ++current == end) {
error("no number after minus sign");
return token(Error);
}
const RangedPtr<const jschar> digitStart = current;
/* 0|[1-9][0-9]+ */
if (!JS7_ISDEC(*current)) {
error("unexpected non-digit");
return token(Error);
}
if (*current++ != '0') {
for (; current < end; current++) {
if (!JS7_ISDEC(*current))
break;
}
}
/* Fast path: no fractional or exponent part. */
if (current == end || (*current != '.' && *current != 'e' && *current != 'E')) {
const jschar *dummy;
double d;
if (!GetPrefixInteger(cx, digitStart.get(), current.get(), 10, &dummy, &d))
return token(OOM);
JS_ASSERT(current == dummy);
return numberToken(negative ? -d : d);
}
/* (\.[0-9]+)? */
if (current < end && *current == '.') {
if (++current == end) {
error("missing digits after decimal point");
return token(Error);
}
if (!JS7_ISDEC(*current)) {
error("unterminated fractional number");
return token(Error);
}
while (++current < end) {
if (!JS7_ISDEC(*current))
break;
}
}
/* ([eE][\+\-]?[0-9]+)? */
if (current < end && (*current == 'e' || *current == 'E')) {
if (++current == end) {
error("missing digits after exponent indicator");
return token(Error);
}
if (*current == '+' || *current == '-') {
if (++current == end) {
error("missing digits after exponent sign");
return token(Error);
}
}
if (!JS7_ISDEC(*current)) {
error("exponent part is missing a number");
return token(Error);
}
while (++current < end) {
if (!JS7_ISDEC(*current))
break;
}
}
double d;
const jschar *finish;
if (!js_strtod(cx, digitStart.get(), current.get(), &finish, &d))
return token(OOM);
JS_ASSERT(current == finish);
return numberToken(negative ? -d : d);
}