Node.js Buffer.readInt32BE() Method
The Buffer.readInt32BE() method is used to read 32 bit integer from a buffer object at a given offset and returns the result in Big endian.
Syntax:
buffer.readInt32BE( offset )
Parameters: This method accepts a single parameter offset which specifies the position of buffer object. It represents the number of bytes to skip before starting to read. The value of offset lies within the range 0 to buffer.length – 4. The default value is 0.
Return value: This method reads an signed 32-bit integer at the specified offset in Big endian.
Example 1:
const buff = Buffer.from([1, 2, 3, 4, 5]);
console.log(buff.readInt32BE(0));
console.log(buff.readInt32BE(1));
|
Output:
16909060
33752069
Example 2:
const buff = Buffer.from([1, 2, 3, 4, 5]);
console.log(buff.readInt32BE(4))
|
Output:
buffer.js:831
throw new RangeError('Index out of range');
^
RangeError: Index out of range
at checkOffset (buffer.js:831:11)
at Buffer.readInt32BE (buffer.js:996:5)
at Object. (/home/cg/root/8545664/main.js:8:18)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:389:7)
The above example shows the error because its parameters are not in the valid range.
Note:
- To get the values in Little endian format you can use Buffer.readInt32LE() method.
- The above program will compile and run by using the
node index.js
command.
Reference: https://nodejs.org/api/buffer.html#buffer_buf_readint32be_offset
Last Updated :
13 Oct, 2021
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