os.mmap

Reads the whole file and returns its binary data as an ArrayBuffer.

    
    
    
mmap(filename)

Examples

Map the binary data of a file.

    javascript
    
    
function ab2str(buf) {
    let arr = new Uint8Array(buf)
    return String.fromCharCode.apply(null, arr)
}

function main() {
    let buffer = os.mmap("strategyConfig/testData.txt")
    Log("File size in bytes:", buffer.byteLength)
    let arr = Array.from(new Uint8Array(buffer))
    Log("arr:",  arr)
    // Output: arr: [72,101,108,108,111,32,70,77,90,33]
    Log("ab2str(buffer):", ab2str(buffer))
    // Output: ab2str(buffer): Hello FMZ!
}

Returns

Arguments

See Also

Remarks

Reads the entire file into memory at once and returns it as an ArrayBuffer (it is not an on-demand memory mapping; a large file takes the same amount of memory).