forked from sheetjs/sheetjs
55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
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/*! otorp (C) 2013-present SheetJS -- http://sheetjs.com */
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import { u8_to_dataview } from "../../../modules/src/util";
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interface MachOEntry {
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type: number;
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subtype: number;
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offset: number;
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size: number;
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align?: number;
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data: Uint8Array;
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}
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var parse_fat = (buf: Uint8Array): MachOEntry[] => {
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var dv = u8_to_dataview(buf);
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if(dv.getUint32(0, false) !== 0xCAFEBABE) throw new Error("Unsupported file");
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var nfat_arch = dv.getUint32(4, false);
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var out: MachOEntry[] = [];
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for(var i = 0; i < nfat_arch; ++i) {
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var start = i * 20 + 8;
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var cputype = dv.getUint32(start, false);
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var cpusubtype = dv.getUint32(start+4, false);
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var offset = dv.getUint32(start+8, false);
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var size = dv.getUint32(start+12, false);
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var align = dv.getUint32(start+16, false);
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out.push({
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type: cputype,
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subtype: cpusubtype,
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offset,
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size,
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align,
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data: buf.slice(offset, offset + size)
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});
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}
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return out;
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};
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var parse_macho = (buf: Uint8Array): MachOEntry[] => {
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var dv = u8_to_dataview(buf);
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var magic = dv.getUint32(0, false);
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switch(magic) {
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// fat binary (x86_64 / aarch64)
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case 0xCAFEBABE: return parse_fat(buf);
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// x86_64
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case 0xCFFAEDFE: return [{
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type: dv.getUint32(4, false),
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subtype: dv.getUint32(8, false),
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offset: 0,
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size: buf.length,
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data: buf
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}];
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}
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throw new Error("Unsupported file");
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};
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export { MachOEntry, parse_macho };
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