flatbuffers
Version:
Memory Efficient Serialization Library
57 lines (56 loc) • 2.02 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);
}