Library for compression algorithm

[Saskia]

Hello,

is there a library for compression algorithm? I want to use huffman (or any other) kind of algorithm to compress my data.
I have a lot of hex values like

Code: Select all

49 00 06 00 37 2A 00 01
20 DD 09 00 10 18 02 01

These values should be compressed, before storing them, so the file size is way less.

- Saskia

[ESP_igrr]

ESP32 ROM code contains some functions from miniz compression library: rom/miniz.h.

Miniz has a number of APIs, but the ones which are available in the ROM are the low-level tdefl_*/tinfl_* compression and decompression functions.

[loboris]

You can use zlib library (https://github.com/madler/zlib).
Copy only the *.c & *.h files from root directory. I't compiles without problems.
You can find an example in https://github.com/loboris/ESP32_curl_example, components/zlib directory.

[Saskia]

Hello,

thanks. I will try the zlib library.

- Saskia

[snahmad75]

https://github.com/madler/zlib is not building on esp32

Have any one manage to uncompress any zip format file include all sub folder into folder on esp32.

Thanks,
Naeem

[jubueche]

I had to add #include <unistd.h> to gzread and gzwrite. Also, I added #include <unistd.h> and #include <sys/types.h> to gzlib.c

It compiled afterwards. Don't forget to put header files in components/zlib/include and c files in components/zlib/