netcdf4-wasm/dist/lazy/memory-reader.js

NetCDF4 library compiled to WebAssembly with TypeScript bindings

"use strict";
// Lazy file reading - in-memory backend
//
// Backs a LazyReader with an existing Uint8Array. This does not save memory (the
// whole buffer is already resident) but provides a uniform reader for callers who
// already hold the bytes, and is the reference backend the tests exercise the
// cache against.
Object.defineProperty(exports, "__esModule", { value: true });
exports.MemoryReader = void 0;
class MemoryReader {
    constructor(data) {
        this.data = data;
    }
    get size() {
        return this.data.length;
    }
    read(offset, length) {
        const end = Math.min(offset + length, this.data.length);
        if (offset < 0 || offset >= this.data.length || end <= offset) {
            return new Uint8Array(0);
        }
        // A view is safe: the source bytes are treated as immutable.
        return this.data.subarray(offset, end);
    }
    close() {
        // Nothing to release.
    }
}
exports.MemoryReader = MemoryReader;
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