decoder-bundle-minimization/work/px_dec.cpp

// Minimal zpaq-stream extractor for the B6 payload.
// Mirror of the published dec.cpp minus the cmix preprocessor: just the one-shot
// libzpaq stream decoder (the exact API pair used by libzpaq::compress).
// Built with: g++ -Dunix -DNOJIT -Os ...
#include "libzpaq.h"
#include <stdio.h>
#include <stdlib.h>

void libzpaq::error(const char* msg) { fprintf(stderr, "zpaq: %s\n", msg); exit(1); }

class In : public libzpaq::Reader {
  FILE* f;
 public:
  In(FILE* x) : f(x) {}
  int get() { return getc(f); }
  int read(char* b, int n) { return fread(b, 1, n, f); }
};

class Out : public libzpaq::Writer {
  FILE* f;
 public:
  Out(FILE* x) : f(x) {}
  void put(int c) { putc(c, f); }
  void write(char* b, int n) { fwrite(b, 1, n, f); }
};

int main(int argc, char** argv) {
  if (argc != 3) { fprintf(stderr, "usage: %s archive out\n", argv[0]); return 2; }
  FILE* fi = fopen(argv[1], "rb");
  if (!fi) { perror(argv[1]); return 1; }
  FILE* fo = fopen(argv[2], "wb");
  if (!fo) { perror(argv[2]); return 1; }
  In in(fi);
  Out out(fo);
  libzpaq::decompress(&in, &out);
  fclose(fi);
  fclose(fo);
  return 0;
}