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optimize JSONReaderUTF8

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高铁 2025-03-04 06:23:53 +08:00
parent 27f6b550ad
commit 35ec71105c
1 changed files with 111 additions and 64 deletions
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175
core/src/main/java/com/alibaba/fastjson2/JSONReaderUTF8.java
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@ -4731,6 +4731,9 @@ class JSONReaderUTF8
valueEscape = true;
c = bytes[offset + 1];
offset += (c == 'u' ? 6 : (c == 'x' ? 4 : 2));
if (ascii && (c == 'u' || c == 'x')) {
ascii = false;
}
continue;
}
@ -4770,82 +4773,126 @@ class JSONReaderUTF8
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 = hexDigit4(bytes, check3(offset + 1, end));
offset += 4;
break;
if (ascii && STRING_CREATOR_JDK11 != null) {
byte[] chars = new byte[valueLength];
offset = start;
for (int i = 0; ; ++i) {
byte ch = bytes[offset];
if (ch == '\\') {
ch = bytes[++offset];
switch (ch) {
case '\\':
case '"':
break;
case 'b':
ch = '\b';
break;
case 't':
ch = '\t';
break;
case 'n':
ch = '\n';
break;
case 'f':
ch = '\f';
break;
case 'r':
ch = '\r';
break;
default:
ch = (byte) char1(ch);
break;
}
case 'x': {
ch = char2(bytes[offset + 1], bytes[offset + 2]);
offset += 2;
break;
}
case '\\':
case '"':
break;
case 'b':
ch = '\b';
break;
case 't':
ch = '\t';
break;
case 'n':
ch = '\n';
break;
case 'f':
ch = '\f';
break;
case 'r':
ch = '\r';
break;
default:
ch = char1(ch);
break;
}
chars[i] = (char) ch;
else if (ch == quote) {
break;
}
chars[i] = ch;
offset++;
} else if (ch == quote) {
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));
}
str = STRING_CREATOR_JDK11.apply(chars, LATIN1);
} else {
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 = hexDigit4(bytes, check3(offset + 1, end));
offset += 4;
break;
}
case 'x': {
ch = char2(bytes[offset + 1], bytes[offset + 2]);
offset += 2;
break;
}
case 14: {
chars[i] = (char)
(((ch & 0x0F) << 12) |
((bytes[offset + 1] & 0x3F) << 6) |
((bytes[offset + 2] & 0x3F) << 0));
offset += 3;
case '\\':
case '"':
break;
}
default: {
/* 10xx xxxx, 1111 xxxx */
char2_utf8(bytes, offset, ch, chars, i);
offset += 4;
i++;
case 'b':
ch = '\b';
break;
case 't':
ch = '\t';
break;
case 'n':
ch = '\n';
break;
case 'f':
ch = '\f';
break;
case 'r':
ch = '\r';
break;
default:
ch = char1(ch);
break;
}
chars[i] = (char) ch;
offset++;
}
else if (ch == quote) {
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);
str = new String(chars);
}
} else if (ascii) {
int strlen = offset - start;
if (strlen == 1) {