buf.readIntBE(offset, byteLength)
offset
<integer> 开始读取之前要跳过的字节数。 必须满足0 <= offset <= buf.length - byteLength
。byteLength
<integer> 要读取的字节数。 必须满足0 < byteLength <= 6
。- 返回: <integer>
从指定的 offset
处的 buf
读取 byteLength
个字节,并将结果解释为支持最高 48 位精度的大端序、二进制补码有符号值。
const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
console.log(buf.readIntBE(0, 6).toString(16));
// 打印: 1234567890ab
console.log(buf.readIntBE(1, 6).toString(16));
// 抛出 ERR_OUT_OF_RANGE。
console.log(buf.readIntBE(1, 0).toString(16));
// 抛出 ERR_OUT_OF_RANGE。
offset
<integer> Number of bytes to skip before starting to read. Must satisfy0 <= offset <= buf.length - byteLength
.byteLength
<integer> Number of bytes to read. Must satisfy0 < byteLength <= 6
.- Returns: <integer>
Reads byteLength
number of bytes from buf
at the specified offset
and interprets the result as a big-endian, two's complement signed value
supporting up to 48 bits of accuracy.
const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
console.log(buf.readIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readIntBE(1, 6).toString(16));
// Throws ERR_OUT_OF_RANGE.
console.log(buf.readIntBE(1, 0).toString(16));
// Throws ERR_OUT_OF_RANGE.