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[JS/TS] Rewrite flexbuffers JS to TS (#6148)

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* Partial TS rewrite

* Completed port but bugs remain

* Expose builder function

* Break out and fix stack-value and formatting
This commit is contained in:
Björn Harrtell
2020-10-19 22:11:35 +02:00
committed by GitHub
parent 9fa1d27059
commit b46db38f57
14 changed files with 1096 additions and 1057 deletions
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34
ts/flexbuffers/bit-width-util.ts Normal file
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import { BitWidth } from './bit-width'
export function toByteWidth(bitWidth: BitWidth): number {
return 1 << bitWidth;
}
export function iwidth(value: number | bigint): BitWidth {
if (value >= -128 && value <= 127) return BitWidth.WIDTH8;
if (value >= -32768 && value <= 32767) return BitWidth.WIDTH16;
if (value >= -2147483648 && value <= 2147483647) return BitWidth.WIDTH32;
return BitWidth.WIDTH64;
}
export function fwidth(value: number): BitWidth {
return value === Math.fround(value) ? BitWidth.WIDTH32 : BitWidth.WIDTH64;
}
export function uwidth(value: number): BitWidth {
if (value <= 255) return BitWidth.WIDTH8;
if (value <= 65535) return BitWidth.WIDTH16;
if (value <= 4294967295) return BitWidth.WIDTH32;
return BitWidth.WIDTH64;
}
export function fromByteWidth(value: number): BitWidth {
if (value === 1) return BitWidth.WIDTH8;
if (value === 2) return BitWidth.WIDTH16;
if (value === 4) return BitWidth.WIDTH32;
return BitWidth.WIDTH64;
}
export function paddingSize(bufSize: number, scalarSize: number): number {
return (~bufSize + 1) & (scalarSize - 1);
}