CA52.h - v0.4

/*
  ca52.h (C/C++)
  CA52 - Compression Algorithm 52 - ("Compress Area 52") - Header
  Coded & Developed by [DA2K] Reptor * youtube.com/c/reptorultra7
*/

#define CA52HEAD_SIG 0x52CA     // CA 52 (bugfix:reversed order!)
#define CA52STRM_LEN 0xFFFF     // 65535 Bytes (64K)
#define CA52DATA_LEN 0x00FFFFFF // 16777215 Bytes (16MB)

// Custom Variable Types
#define uchar unsigned char  //  8-bit byte (00..FF/255)
#define uword unsigned short // 16-bit word (00..FFFF/65535)
#define ulong unsigned long  // 32-bit word (00..FFFFFFFF/4294967295)

// File Header (5 Bytes)
typedef struct { // word integers are stored in little-endian (lo,hi)
  uword Sig;     // CA52 Header Signature (Magic Number CA52HEAD_SIG)
  uword DataLen; // Length of Packed Data Stream (1..65535 Bytes)
  uchar Method;  // Compression Method (see CA52METHOD[])
} CA52HEADER;

// Compression Methods
const uchar CA52METHOD[4] = {
  0xEF, // "Ethereum Frontier": mostly packed http-URLs for BTC/ETH
  0x25, // "2-Step": packed stream crunched twice for better ratio!
  0xCD, // "Compressed Dictionary": w/macros, for packed ASCII text
  0x7E  // "Zetauri WAV Crunch": highly compressed *.WAV audio data
};

// Global Variables
uchar CA52STREAM [CA52STRM_LEN]; // packed stream (input)
uchar CA52BUFFER [CA52STRM_LEN]; // buffered data (temporary)
uchar CA52OUTPUT [CA52DATA_LEN]; // uncompressed  (output)
bool  IsCA52; // used for checks

/*
  Initial Version 0.1 (2015-08-28)
  * URL: pastie.org/pastes/10394287
  * MD5: 6482deb2020c1edb82d16f256b1c0fa5

  Revised Version 0.2 (2015-09-15)
  * URL: pastebin.com/Cu6EKsX1
  * MD5: a3a5fa8a2bdb32389387acbea8ae75c8

  Updated Version 0.3 (2015-12-11)
  * URL: pastebin.com/1zh50698
  * MD5: 68f0a19f93d2ab424a72607e689db382

  Updated Version 0.4 (2016-06-02)
  * URL: pastebin.com/1e5TsfGT
  * MD5: (n/a)
*/