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// Start of values.js
var futharkPrimtypes =
new Set([
'i8',
'i16',
'i32',
'i64',
'u8',
'u16',
'u32',
'u64',
'f16',
'f32',
'f64',
'bool']);
var typToType = { ' i8' : Int8Array ,
' i16' : Int16Array ,
' i32' : Int32Array ,
' i64' : BigInt64Array ,
' u8' : Uint8Array ,
' u16' : Uint16Array ,
' u32' : Uint32Array ,
' u64' : BigUint64Array ,
' f16' : Uint16Array ,
' f32' : Float32Array ,
' f64' : Float64Array ,
'bool' : Uint8Array
};
function binToStringArray(buff, array) {
for (var i = 0; i < array.length; i++) {
array[i] = buff[i];
}
}
function fileToBuff(fname) {
var readline = require('readline');
var fs = require('fs');
var buff = fs.readFileSync(fname);
return buff;
}
var typToSize = {
"bool" : 1,
" u8" : 1,
" i8" : 1,
" u16" : 2,
" i16" : 2,
" u32" : 4,
" i32" : 4,
" f16" : 2,
" f32" : 4,
" u64" : 8,
" i64" : 8,
" f64" : 8,
}
function toU8(ta) {
return new Uint8Array(ta.buffer, ta.byteOffset, ta.byteLength);
}
function construct_binary_value(v, typ) {
var dims;
var payload_bytes;
var filler;
if (v instanceof FutharkOpaque) {
throw "Opaques are not supported";
} else if (v instanceof FutharkArray) {
var t = v.futharkType();
var ftype = " ".slice(t.length) + t;
var shape = v.shape();
var ta = v.toTypedArray(shape);
var da = new BigInt64Array(shape);
dims = shape.length;
payload_bytes = da.byteLength + ta.byteLength;
filler = (bytes) => {
bytes.set(toU8(da), 7);
bytes.set(toU8(ta), 7 + da.byteLength);
}
} else {
var ftype = " ".slice(typ.length) + typ;
dims = 0;
payload_bytes = typToSize[ftype];
filler = (bytes) => {
var scalar = new (typToType[ftype])([v]);
bytes.set(toU8(scalar), 7);
}
}
var total_bytes = 7 + payload_bytes;
var bytes = new Uint8Array(total_bytes);
bytes[0] = Buffer.from('b').readUInt8();
bytes[1] = 2;
bytes[2] = dims;
for (var i = 0; i < 4; i++) {
bytes[3+i] = ftype.charCodeAt(i);
}
filler(bytes);
return Buffer.from(bytes);
}
class Reader {
constructor(f) {
this.f = f;
this.buff = fileToBuff(f);
}
read_bin_array(num_dim, typ) {
var u8_array = new Uint8Array(num_dim * 8);
binToStringArray(this.buff.slice(0, num_dim * 8), u8_array);
var shape = new BigInt64Array(u8_array.buffer);
var length = shape[0];
for (var i = 1; i < shape.length; i++) {
length = length * shape[i];
}
length = Number(length);
var dbytes = typToSize[typ];
var u8_data = new Uint8Array(length * dbytes);
binToStringArray(this.buff.slice(num_dim * 8, num_dim * 8 + dbytes * length), u8_data);
var data = new (typToType[typ])(u8_data.buffer);
var tmp_buff = this.buff.slice(num_dim * 8, num_dim * 8 + dbytes * length);
this.buff = this.buff.slice(num_dim * 8 + dbytes * length);
return [shape, data];
}
read_bin_scalar(typ) {
var size = typToSize[typ];
var u8_array = new Uint8Array(size);
binToStringArray(this.buff, u8_array);
var array = new (typToType[typ])(u8_array.buffer);
this.buff = this.buff.slice(u8_array.length); // Update buff to be unread part of the string
return array[0];
}
skip_spaces() {
while (this.buff.length > 0 && this.buff.slice(0, 1).toString().trim() == "") {
this.buff = this.buff.slice(1);
}
}
read_binary(typename, dim) {
// Skip leading white space
while (this.buff.slice(0, 1).toString().trim() == "") {
this.buff = this.buff.slice(1);
}
if (this.buff[0] != 'b'.charCodeAt(0)) {
throw "Not in binary format"
}
var version = this.buff[1];
if (version != 2) {
throw "Not version 2";
}
var num_dim = this.buff[2];
var typ = this.buff.slice(3, 7);
this.buff = this.buff.slice(7);
var exp_typ = "[]".repeat(dim) + typename;
var given_typ = "[]".repeat(num_dim) + typ.toString().trim();
console.log(exp_typ);
console.log(given_typ);
if (exp_typ !== given_typ) {
throw ("Expected type : " + exp_typ + ", Actual type : " + given_typ);
}
if (num_dim === 0) {
return this.read_bin_scalar(typ);
} else {
return this.read_bin_array(num_dim, typ);
}
}
get_buff() {
return this.buff;
}
}
// Function is redudant but is helpful for keeping consistent with python implementation
function skip_spaces(reader) {
reader.skip_spaces();
}
function read_value(typename, reader) {
var typ = typename;
var dim = 0;
while (typ.slice(0, 2) === "[]") {
dim = dim + 1;
typ = typ.slice(2);
}
if (!futharkPrimtypes.has(typ)) {
throw ("Unkown type: " + typ);
}
var val = reader.read_binary(typ, dim);
return val;
}
// End of values.js
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