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com.alibaba.fastjson2.JSONReaderUTF8Vector Maven / Gradle / Ivy
package com.alibaba.fastjson2;
import com.alibaba.fastjson2.util.TypeUtils;
import jdk.incubator.vector.ByteVector;
import jdk.incubator.vector.Vector;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import static com.alibaba.fastjson2.JSONWriterUTF16Vector.*;
import static com.alibaba.fastjson2.util.JDKUtils.*;
final class JSONReaderUTF8Vector
extends JSONReaderUTF8 {
JSONReaderUTF8Vector(Context ctx, String str, byte[] bytes, int offset, int length) {
super(ctx, str, bytes, offset, length);
}
@Override
public String readString() {
if (ch == '"' || ch == '\'') {
final byte[] bytes = this.bytes;
char quote = this.ch;
int valueLength;
int offset = this.offset;
final int start = offset, end = this.end;
boolean ascii = true;
valueEscape = false;
{
int i = 0;
Vector v_quote = quote == '"' ? V_BYTE_64_DOUBLE_QUOTE : V_BYTE_64_SINGLE_QUOTE;
for (; offset + 8 < end; offset += 8, i += 8) {
ByteVector v = (ByteVector) ByteVector.SPECIES_64.fromArray(bytes, offset);
if (v.eq(V_BYTE_64_SLASH).or(v.eq(v_quote).or(v.lt(V_BYTE_64_ZERO))).anyTrue()) {
break;
}
}
for (; ; ++i) {
if (offset >= end) {
throw new JSONException("invalid escape character EOI");
}
int c = bytes[offset];
if (c == '\\') {
valueEscape = true;
c = bytes[offset + 1];
offset += (c == 'u' ? 6 : (c == 'x' ? 4 : 2));
continue;
}
if (c >= 0) {
if (c == quote) {
valueLength = i;
break;
}
offset++;
} else {
ascii = false;
switch ((c & 0xFF) >> 4) {
case 12:
case 13: {
/* 110x xxxx 10xx xxxx*/
offset += 2;
break;
}
case 14: {
offset += 3;
break;
}
default: {
/* 10xx xxxx, 1111 xxxx */
if ((c >> 3) == -2) {
offset += 4;
i++;
break;
}
throw new JSONException("malformed input around byte " + offset);
}
}
}
}
}
String str;
if (valueEscape) {
char[] chars = new char[valueLength];
offset = start;
for (int i = 0; ; ++i) {
int ch = bytes[offset];
if (ch == '\\') {
ch = bytes[++offset];
switch (ch) {
case 'u': {
ch = char4(bytes[offset + 1], bytes[offset + 2], bytes[offset + 3], bytes[offset + 4]);
offset += 4;
break;
}
case 'x': {
ch = char2(bytes[offset + 1], bytes[offset + 2]);
offset += 2;
break;
}
case '\\':
case '"':
break;
default:
ch = char1(ch);
break;
}
chars[i] = (char) ch;
offset++;
} else if (ch == '"') {
break;
} else {
if (ch >= 0) {
chars[i] = (char) ch;
offset++;
} else {
switch ((ch & 0xFF) >> 4) {
case 12:
case 13: {
/* 110x xxxx 10xx xxxx*/
chars[i] = (char) (((ch & 0x1F) << 6) | (bytes[offset + 1] & 0x3F));
offset += 2;
break;
}
case 14: {
chars[i] = (char)
(((ch & 0x0F) << 12) |
((bytes[offset + 1] & 0x3F) << 6) |
((bytes[offset + 2] & 0x3F) << 0));
offset += 3;
break;
}
default: {
/* 10xx xxxx, 1111 xxxx */
char2_utf8(bytes, offset, ch, chars, i);
offset += 4;
i++;
}
}
}
}
}
str = new String(chars);
} else if (ascii) {
int strlen = offset - start;
if (strlen == 1) {
str = TypeUtils.toString((char) (bytes[start] & 0xff));
} else if (strlen == 2) {
str = TypeUtils.toString(
(char) (bytes[start] & 0xff),
(char) (bytes[start + 1] & 0xff)
);
} else if (STRING_CREATOR_JDK11 != null) {
str = STRING_CREATOR_JDK11.apply(
Arrays.copyOfRange(this.bytes, this.offset, offset),
LATIN1);
} else {
str = new String(bytes, start, offset - start, StandardCharsets.US_ASCII);
}
} else {
str = new String(bytes, start, offset - start, StandardCharsets.UTF_8);
}
if ((context.features & Feature.TrimString.mask) != 0) {
str = str.trim();
}
int ch = ++offset == end ? EOI : bytes[offset++];
while (ch <= ' ' && (1L << ch & SPACE) != 0) {
ch = offset == end ? EOI : bytes[offset++];
}
if (comma = ch == ',') {
ch = offset == end ? EOI : bytes[offset++];
while (ch <= ' ' && (1L << ch & SPACE) != 0) {
ch = offset == end ? EOI : bytes[offset++];
}
}
this.ch = (char) ch;
this.offset = offset;
return str;
}
switch (ch) {
case '[':
return toString(
readArray());
case '{':
return toString(
readObject());
case '-':
case '+':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
readNumber0();
Number number = getNumber();
return number.toString();
case 't':
case 'f':
boolValue = readBoolValue();
return boolValue ? "true" : "false";
case 'n': {
readNull();
return null;
}
default:
throw new JSONException("TODO : " + ch);
}
}
public static class Factory
implements JSONFactory.JSONReaderUTF8Creator {
@Override
public JSONReader create(Context ctx, String str, byte[] bytes, int offset, int length) {
return new JSONReaderUTF8Vector(ctx, str, bytes, offset, length);
}
}
}
