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some basic viewer

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This commit is contained in:
Robin Appelman 2023-04-29 14:54:53 +02:00
commit 5910b2f35a
45 changed files with 1089 additions and 1436 deletions
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8
script/header.ts
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@ -26,8 +26,12 @@ export interface GetStringDataView extends DataView {
getString: (offset: number, length: number) => string;
}
export async function parseHeader(file): Promise<DemoHead> {
export async function parseHeader(file: File): Promise<DemoHead> {
const data = await readFile(file);
return parseHeaderFromBuffer(data);
}
export function parseHeaderFromBuffer(data: ArrayBuffer): DemoHead {
const view = new DataView(data) as GetStringDataView;
return {
'type': view.getString(0, 8),
@ -40,7 +44,7 @@ export async function parseHeader(file): Promise<DemoHead> {
};
}
async function readFile(file: File): Promise<ArrayBuffer> {
export async function readFile(file: File): Promise<ArrayBuffer> {
return new Promise((resolve, reject) => {
const reader = new FileReader();