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optimize skipNumber

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This commit is contained in:
wenshao 2025-03-07 19:45:07 +08:00
parent c17a8d4a0d
commit 15827e78c0
3 changed files with 22 additions and 0 deletions
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3
core/src/main/java/com/alibaba/fastjson2/JSONReaderUTF16.java
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@ -3167,6 +3167,9 @@ final class JSONReaderUTF16
boolean num = false;
if (!dot && (ch >= '0' && ch <= '9')) {
num = true;
while (IOUtils.isDigit2(bytes, offset)) {
offset += 2;
}
do {
ch = offset == end ? EOI : bytes[offset++];
} while (ch >= '0' && ch <= '9');

3
core/src/main/java/com/alibaba/fastjson2/JSONReaderUTF8.java
View File

@ -4311,6 +4311,9 @@ class JSONReaderUTF8
boolean num = false;
if (!dot && (ch >= '0' && ch <= '9')) {
num = true;
while (IOUtils.isDigit2(bytes, offset)) {
offset += 2;
}
do {
ch = offset == end ? EOI : bytes[offset++];
} while (ch >= '0' && ch <= '9');

16
core/src/main/java/com/alibaba/fastjson2/util/IOUtils.java
View File

@ -1514,6 +1514,22 @@ public class IOUtils {
return (d & 0xF) * 10 + (d >> 8);
}
public static boolean isDigit2(byte[] bytes, int off) {
short x = UNSAFE.getShort(bytes, ARRAY_BYTE_BASE_OFFSET + off);
if (BIG_ENDIAN) {
x = Short.reverseBytes(x);
}
return (((x & 0xF0F0) - 0x3030) | (((x & 0x0F0F) + 0x0606) & 0xF0F0)) == 0;
}
public static boolean isDigit2(char[] bytes, int off) {
int x = UNSAFE.getShort(bytes, ARRAY_BYTE_BASE_OFFSET + ((long) off << 1));
if (BIG_ENDIAN) {
x = Integer.reverseBytes(x);
}
return ((((x & 0xFFF0FFF0) - 0x300030) | (((x & 0x0F000F) + 0x060006) & 0xF000F0)) == 0);
}
public static int digit(int d) {
return d >= 0 && d <= 9 ? d : -1;
}