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/// <reference path="../njs_core.d.ts" />
declare module "zlib" {
interface NjsZlibOptions {
/**
* the buffer size for feeding data to and pulling data
* from the zlib routines, defaults to 1024.
*/
chunkSize?: number;
/**
* The dictionary buffer.
*/
dictionary?: NjsStringOrBuffer;
/**
* Compression level, from zlib.constants.Z_NO_COMPRESSION to
* zlib.constants.Z_BEST_COMPRESSION. Defaults to
* zlib.constants.Z_DEFAULT_COMPRESSION.
*/
level?: number;
/**
* Specifies how much memory should be allocated for the internal compression state.
* 1 uses minimum memory but is slow and reduces compression ratio;
* 9 uses maximum memory for optimal speed.
* The default value is 8.
*/
memLevel?: number;
/**
* The compression strategy, defaults to zlib.constants.Z_DEFAULT_STRATEGY.
*/
strategy?: number;
/**
* The log2 of window size.
* -15 to -9 for raw data, from 9 to 15 for an ordinary stream.
*/
windowBits?: number;
}
type NjsZlibConstants = {
/**
* No compression.
*/
Z_NO_COMPRESSION: number;
/**
* Fastest, produces the least compression.
*/
Z_BEST_SPEED: number;
/**
* Trade-off between speed and compression.
*/
Z_DEFAULT_COMPRESSION: number;
/**
* Slowest, produces the most compression.
*/
Z_BEST_COMPRESSION: number;
/**
* Filtered strategy: for the data produced by a filter or predictor.
*/
Z_FILTERED: number;
/**
* Huffman-only strategy: only Huffman encoding, no string matching.
*/
Z_HUFFMAN_ONLY: number;
/**
* Run Length Encoding strategy: limit match distances to one,
* better compression of PNG image data.
*/
Z_RLE: number;
/**
* Fixed table strategy: prevents the use of dynamic Huffman codes,
* a simpler decoder for special applications.
*/
Z_FIXED: number;
/**
* Default strategy, suitable for general purpose compression.
*/
Z_DEFAULT_STRATEGY: number;
};
interface Zlib {
/**
* Compresses data using deflate, and do not append a zlib header.
*
* @param data - The data to be compressed.
*/
deflateRawSync(data: NjsStringOrBuffer, options?:NjsZlibOptions): Buffer;
/**
* Compresses data using deflate.
*
* @param data - The data to be compressed.
*/
deflateSync(data: NjsStringOrBuffer, options?:NjsZlibOptions): Buffer;
/**
* Decompresses a raw deflate stream.
*
* @param data - The data to be decompressed.
*/
inflateRawSync(data: NjsStringOrBuffer, options?:NjsZlibOptions): Buffer;
/**
* Decompresses a deflate stream.
*
* @param data - The data to be decompressed.
*/
inflateSync(data: NjsStringOrBuffer, options?:NjsZlibOptions): Buffer;
constants: NjsZlibConstants;
}
const zlib: Zlib;
export default zlib;
}
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