Deflate Compression On Windows

winflate.c

/**
  BSD 3-Clause License

  Copyright (c) 2019 Odzhan. All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

  * Neither the name of the copyright holder nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <Windows.h>
#include <stdio.h>
#include <inttypes.h>
#include <limits.h>

#include "zlib.h"

#define DEFLATE 1
#define INFLATE 2

typedef int (WINAPI *ums_deflate_init_t)(z_streamp stream, int level, const char * version, int stream_size);
typedef int (WINAPI *ums_deflate_t)(z_streamp stream, int flush);

typedef int (WINAPI *ums_inflate_init_t)(z_streamp stream, const char * version, int stream_size);
typedef int (WINAPI *ums_inflate_t)(z_streamp stream, int flush);

static uint32_t file_diff(uint32_t new_len, uint32_t old_len) {
    if (new_len <= UINT_MAX / 100) {
      new_len *= 100;
    } else {
      old_len /= 100;
    }
    if (old_len == 0) {
      old_len = 1;
    }
    return (100 - (new_len / old_len));
}

VOID xstrerror (PCHAR fmt, ...){
    PCHAR   error=NULL;
    va_list arglist;
    CHAR    buffer[1024];
    DWORD   dwError=GetLastError();
    
    va_start(arglist, fmt);
    _vsnprintf(buffer, ARRAYSIZE(buffer), fmt, arglist);
    va_end (arglist);
    
    if (FormatMessage (
          FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
          NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
          (LPSTR)&error, 0, NULL))
    {
      printf("  [ %s : %s\n", buffer, error);
      LocalFree (error);
    } else {
      printf("  [ %s error : %08lX\n", buffer, dwError);
    }
}

DWORD CompressBuffer(LPVOID inbuf, DWORD inlen, HANDLE outfile) {
    SIZE_T             outlen, len;
    LPVOID             outbuf;
    DWORD              wr;
    HMODULE            m;
    z_stream           ds;
    ums_deflate_t      ums_deflate;
    ums_deflate_init_t ums_deflate_init;
    int                err;
    
    m = LoadLibrary("PresentationNative_v0300.dll");
    ums_deflate_init = (ums_deflate_init_t)GetProcAddress(m, "ums_deflate_init");
    ums_deflate      = (ums_deflate_t)GetProcAddress(m, "ums_deflate");
    
    if(ums_deflate_init == NULL || ums_deflate == NULL) {
      printf("  [ unable to resolve deflate API.\n");
      return 0;
    }
    // allocate memory for compressed data
    outbuf = malloc(inlen);
    if(outbuf != NULL) {
      // Compress data and write data to outbuf.
      ds.zalloc    = Z_NULL;
      ds.zfree     = Z_NULL;
      ds.opaque    = Z_NULL;
      ds.avail_in  = (uInt)inlen;       // size of input
      ds.next_in   = (Bytef *)inbuf;    // input buffer
      ds.avail_out = (uInt)inlen;       // size of output buffer
      ds.next_out  = (Bytef *)outbuf;   // output buffer
      
      if(ums_deflate_init(&ds, Z_BEST_COMPRESSION, "1", sizeof(ds)) == Z_OK) {
        if((err = ums_deflate(&ds, Z_FINISH)) == Z_STREAM_END) {
          // write the original length first
          WriteFile(outfile, &inlen, sizeof(DWORD), &wr, NULL);
          // then the data
          WriteFile(outfile, outbuf, ds.avail_out, &wr, NULL);
        } else {
          printf("  [ ums_deflate() : %x\n", err);
        }
      } else {
        printf("  [ ums_deflate_init()\n");
      }
      free(outbuf);
    }
    return 1;
}

DWORD DecompressBuffer(LPVOID inbuf, DWORD inlen, HANDLE outfile) {
    SIZE_T             outlen, len;
    LPVOID             outbuf;
    DWORD              wr;
    HMODULE            m;
    z_stream           ds;
    ums_inflate_t      ums_inflate;
    ums_inflate_init_t ums_inflate_init;
    
    m = LoadLibrary("PresentationNative_v0300.dll");
    ums_inflate_init = (ums_inflate_init_t)GetProcAddress(m, "ums_inflate_init");
    ums_inflate      = (ums_inflate_t)GetProcAddress(m, "ums_inflate");
    
    if(ums_inflate_init == NULL || ums_inflate == NULL) {
      printf("  [ unable to resolve inflate API.\n");
      return 0;
    }
    // allocate memory for decompressed data
    outlen = *(DWORD*)inbuf;
    outbuf = malloc(outlen*2);
    
    if(outbuf != NULL) {
      // decompress data and write data to outbuf.
      ds.zalloc    = Z_NULL;
      ds.zfree     = Z_NULL;
      ds.opaque    = Z_NULL;
      ds.avail_in  = (uInt)inlen - 8;       // size of input
      ds.next_in   = (Bytef*)inbuf + 4;     // input buffer
      ds.avail_out = (uInt)outlen*2;        // size of output buffer
      ds.next_out  = (Bytef*)outbuf;        // output buffer
      
      printf("  [ initializing inflate...\n");
      if(ums_inflate_init(&ds, "1", sizeof(ds)) == Z_OK) {
        printf("  [ inflating...\n");
        if(ums_inflate(&ds, Z_FINISH) == Z_STREAM_END) {
          WriteFile(outfile, outbuf, ds.avail_out, &wr, NULL);
        } else {
          printf("  [ ums_inflate()\n");
        }
      } else {
        printf("  [ ums_inflate_init()\n");
      }
      free(outbuf);
    } else {
      printf("  [ malloc()\n");
    }
    return 1;
}

// map a file for reading
DWORD CompressOrDecompress(BOOL compress, const char *infile, const char *outfile) {
    HANDLE        fin, fout, map;
    LPVOID        inbuf;
    DWORD         inlen, outlen, err;
    LARGE_INTEGER fs;
    
    // open input file for reading
    fin = CreateFile(infile, GENERIC_READ, 
      FILE_SHARE_READ, NULL, OPEN_EXISTING, 
      FILE_ATTRIBUTE_NORMAL, NULL);
      
    // error? exit
    if(fin == INVALID_HANDLE_VALUE) {
      xstrerror("CreateFile");
      return GetLastError();
    }
    
    // read the file size
    GetFileSizeEx(fin, &fs);
    if(fs.QuadPart == 0) {
      printf("file is empty\n");
      return 0;
    }
    inlen = fs.LowPart;
    
    // create file mapping
    map = CreateFileMapping(fin, NULL, PAGE_READONLY, 0, 0, NULL);
    if(map != NULL) {
      // map a view of the file
      inbuf = MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0);
      if(inbuf != NULL) {
        // open output file for writing
        fout = CreateFile(outfile, GENERIC_WRITE,
          FILE_SHARE_WRITE, NULL, CREATE_ALWAYS,
          FILE_ATTRIBUTE_NORMAL, NULL);
        // if file opened
        if(fout != INVALID_HANDLE_VALUE) {
          // compress?
          if(compress == DEFLATE) {
            err = CompressBuffer(inbuf, inlen, fout);
          } else {
            err = DecompressBuffer(inbuf, inlen, fout);
          }
          GetFileSizeEx(fout, &fs);
          outlen = fs.LowPart;
          CloseHandle(fout);
        } else {
          xstrerror("CreateFile");
        }
        // unmap view
        UnmapViewOfFile(inbuf);
      } else {
        xstrerror("MapViewOfFile");
      }
      // close mapping
      CloseHandle(map);
    } else {
      xstrerror("CreateFileMapping");
    }
    // close input file
    CloseHandle(fin);
    
    // return the ratio
    return (compress == DEFLATE) ? file_diff(outlen, inlen) : file_diff(inlen, outlen);
}

static char* get_param (int argc, char *argv[], int *i) {
    int n = *i;
    if (argv[n][2] != 0) {
      return &argv[n][2];
    }
    if ((n+1) < argc) {
      *i = n + 1;
      return argv[n+1];
    }
    printf("  [ %c%c requires parameter\n", argv[n][0], argv[n][1]);
    exit (0);
}

void usage(void) {
    printf(" usage: winflate [options] -i <infile> -o <outfile>\n");
    printf("       -c              Compress\n");
    printf("       -d              Decompress\n");
    printf("       -i <infile>     Input file\n");
    printf("       -o <outfile>    Output file\n\n");
    exit(-1);
}
  
int main(int argc, char *argv[]) {
    DWORD ratio, i, compress = 0;
    PCHAR infile             = NULL, outfile = NULL;
    
    printf("\n");
    printf("  [ DEFLATE compression utility v0.1\n");
    printf("  [ Copyright (c) 2019 Odzhan\n\n");
    
    if(argc < 3) {
      usage();
    }
    
    // for each argument
    for(i=1; i<argc; i++) {
      // is this a switch?
      if(argv[i][0] == '/'  || argv[i][0] == '-') {
        switch(argv[i][1]) {
          // compress?
          case 'c':
            compress = DEFLATE;
            break;
          // decompress?
          case 'd':
            compress = INFLATE;
            break;
          // input file
          case 'i':
            infile = get_param(argc, argv, &i);
            break;
          // output file
          case 'o':
            outfile = get_param(argc, argv, &i);
            break;
          default:
            usage();
        }
      } else {
        usage();
      }
    }
    // no input?
    if(infile == NULL) {
      printf("  [ no input file specified.\n");
      return 0;
    }
    // no output?
    if(outfile == NULL) {
      printf("  [ no output file specified.\n");
      return 0;
    }
    
    // no mode selected?
    if(compress == 0) {
      printf("  [ use -c for compression or -d for decompression.\n");
      return 0;
    }
    printf("  [ %s %s to %s\n", 
      compress == DEFLATE ? "compressing" : "decompressing",
      infile, outfile);
      
    // 1=compress, 2=decompress
    ratio = CompressOrDecompress(compress, infile, outfile);
    
    printf("  [ file size %s by %"PRId32"%%\n", 
      compress == DEFLATE ? "reduced" : "increased", ratio);
      
    return 0;
}