RZ

01: // AlgoZlib.hh # common utilities for rz analysis and synthesis
02: 
03: #ifndef _AlgoZlib_HH
04: #define _AlgoZlib_HH 1
05: 
06: // ######## ######## ######## ######## ######## ######## ######## ########
07: 
08: #include "zlib.h"
09: #include <stdexcept>
10: #include <sstream>
11: 
12: // ######## ######## ######## namespace declarations ######## ######## ########
13: 
14: namespace Zlib {
15:     struct Error;
16:     struct Inflate;
17:     struct Deflate;
18:     typedef Bytef Bytef;
19: }
20: 
21: // ######## ######## ######## ZLib interface ######## ######## ########
22: 
23: struct Zlib::Error: std::runtime_error {
24:     Error(): std::runtime_error("Zlib Error") {}
25:     Error(std::string const & w): std::runtime_error(w) {}
26: };
27: 
28: struct Zlib::Inflate {
29:     z_stream z_inflate;
30:     Inflate(std::string streamname)
31:     {
32:         z_inflate.zalloc = (alloc_func)0;
33:         z_inflate.zfree  = (free_func)0;
34:         z_inflate.opaque = (voidpf)0;
35: 
36:         int s = inflateInit2(
37:             &z_inflate,
38:             MAX_WBITS);
39:         if (s != Z_OK) {
40:             std::ostringstream err;
41:             err << streamname << " Initialization failed: " << s;
42:             throw Error(err.str());
43:         }
44:     }
45:     ~Inflate() { inflateEnd(&z_inflate); }
46:     int zlib_inflate(int flush = Z_SYNC_FLUSH)
47:     {
48:         return inflate(&z_inflate, flush);
49:     }
50: };
51: 
52: struct Zlib::Deflate {
53:     z_stream z_deflate;
54:     Deflate(std::string streamname)
55:     {
56:         z_deflate.zalloc = (alloc_func)0;
57:         z_deflate.zfree  = (free_func)0;
58:         z_deflate.opaque = (voidpf)0;
59: 
60:         int s = deflateInit2(
61:             &z_deflate,
62:             Z_DEFAULT_COMPRESSION,
63:             Z_DEFLATED,
64:             MAX_WBITS,
65:             MAX_MEM_LEVEL,
66:             Z_DEFAULT_STRATEGY);
67:         if (s != Z_OK) {
68:             std::ostringstream err;
69:             err << streamname << " Initialization failed: " << s;
70:             throw Error(err.str());
71:         }
72:     }
73:     ~Deflate() { deflateEnd(&z_deflate); }
74:     int zlib_deflate(int flush = Z_SYNC_FLUSH)
75:     {
76:         return deflate(&z_deflate, flush);
77:     }
78: };
79: 
80: // ######## ######## ######## ######## ######## ######## ######## ########
81: 
82: // AlgoZlib.hh # common utilities for rz analysis and synthesis
83: 
84: #endif