README: reference util/deflate

**zlib-deflate-nostdlib** provides a zlib decompressor (RFC 1950) and deflate

reader (RFC 1951) suitable for 8- and 16-bit microcontrollers. It works

fine on MCUs as small as ATMega328P (used, for example, in the Arduino Nano)

and MSP430FR5994. It is compatible with both C (tested with c99) and C++

(tested with c++14). Apart from type definitions for (u)int8\_t, (u)int16\_t,

and MSP430FR5994. It is compatible with both C (e.g. c99) and C++

(e.g. c++20). Apart from type definitions for (u)int8\_t, (u)int16\_t,

and (u)int32\_t, which are typically provided by stdint.h, it has no external

dependencies.

expected to be unsigned 16-bit integers. Both functions return the number of

bytes written to `output`, or a negative value on error.

You can use util/deflate to compress files into C/C++ arrays, see `util/deflate

--help`.

Example for zlib decompression (RFC 1950):

```

#include "inflate.h"

unsigned char inflate_input[] = { /* some compressed data, e.g.: */

    120, 156, 243, 72, 205, 201, 201, 215, 81, 8, 207, 47, 202, 73, 177, 87,

    240, 64, 226, 41, 2, 0, 128, 125, 9, 17

};

// Hello, World? Hello, World!

unsigned short const inflate_input_size = 26;

unsigned char const inflate_input[] = {120, 156, 243, 72, 205, 201, 201, 215,

    81, 8, 207, 47, 202, 73, 177, 87, 240, 64, 226, 41, 2, 0, 128, 125, 9, 17};

unsigned char inflate_output[128];

// within some function

{

    int16_t out_bytes = inflate_zlib(inflate_input, sizeof(inflate_input),

    int16_t out_bytes = inflate_zlib(inflate_input, inflate_input_size,

                                     inflate_output, sizeof(inflate_output));

    if (out_bytes < 0) {

        // error