flatbuffers
Version:
Memory Efficient Serialization Library
52 lines (51 loc) • 1.98 kB
JavaScript
import { ValueType } from './value-type.js';
export function isInline(value) {
return value === ValueType.BOOL || value <= ValueType.FLOAT;
}
export function isNumber(value) {
return value >= ValueType.INT && value <= ValueType.FLOAT;
}
export function isIndirectNumber(value) {
return value >= ValueType.INDIRECT_INT && value <= ValueType.INDIRECT_FLOAT;
}
export function isTypedVectorElement(value) {
return (value === ValueType.BOOL ||
(value >= ValueType.INT && value <= ValueType.STRING));
}
export function isTypedVector(value) {
return (value === ValueType.VECTOR_BOOL ||
(value >= ValueType.VECTOR_INT &&
value <= ValueType.VECTOR_STRING_DEPRECATED));
}
export function isFixedTypedVector(value) {
return value >= ValueType.VECTOR_INT2 && value <= ValueType.VECTOR_FLOAT4;
}
export function isAVector(value) {
return (isTypedVector(value) ||
isFixedTypedVector(value) ||
value === ValueType.VECTOR);
}
export function toTypedVector(valueType, length) {
if (length === 0)
return valueType - ValueType.INT + ValueType.VECTOR_INT;
if (length === 2)
return valueType - ValueType.INT + ValueType.VECTOR_INT2;
if (length === 3)
return valueType - ValueType.INT + ValueType.VECTOR_INT3;
if (length === 4)
return valueType - ValueType.INT + ValueType.VECTOR_INT4;
throw 'Unexpected length ' + length;
}
export function typedVectorElementType(valueType) {
return valueType - ValueType.VECTOR_INT + ValueType.INT;
}
export function fixedTypedVectorElementType(valueType) {
return ((valueType - ValueType.VECTOR_INT2) % 3) + ValueType.INT;
}
export function fixedTypedVectorElementSize(valueType) {
// The x / y >> 0 trick is to have an int division. Suppose to be faster than Math.floor()
return (((valueType - ValueType.VECTOR_INT2) / 3) >> 0) + 2;
}
export function packedType(valueType, bitWidth) {
return bitWidth | (valueType << 2);
}