lz78压缩算法c语言实现,LZW字典压缩算法的实现

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对于这个对LZW压缩算法的实现 可以编译成静态库什么的来使用，下面是用它来压缩解压文件的例子：

#include

#include

#include

#include

LZWBOOL LZWBACKCALL LZW_PROC(LZWDWORD size,void *buffer,void *orgs)

{

if(fwrite(buffer,1,size,(FILE*)orgs) == 0)

return FALSE;

return TRUE;

}

//压缩文件

/*

int __cdecl main(int argc,char **argv)

{

FILE *i;

FILE *o;

LZWCOMPRESSER *pcompresser;

unsigned char arr[4096];

unsigned char arr2[4096];

size_t size;

pcompresser = (LZWCOMPRESSER*)malloc(sizeof(LZWCOMPRESSER));

i = fopen("C:\\Users\\XXXX\\Desktop\\a.bmp","rb");

o = fopen("C:\\Users\\XXXX\\Desktop\\a.lzw","wb");

if(i == NULL || o == NULL)

printf("error!\n");

LZWCompresser_Begin(pcompresser,2048,arr2,LZW_PROC,o);

printf("compressing ... \n");

while((size = fread(arr,1,4096,i)) > 0)

{

switch(LZWCompresser_Run(pcompresser,size,arr))

{

case LZWCOMPRESSER_OUTPUTERROR:

printf("Output Error!\n");

break;

case LZWCOMPRESSER_BUG:

printf("Bug!\n");

break;

default:;

}

}

LZWCompresser_End(pcompresser);

printf("end! \n");

fclose(i);

fflush(o);

fclose(o);

system("pause");

free(pcompresser);

return 0;

}

*/

//解压文件

int __cdecl main(int argc,char **argv)

{

FILE *i;

FILE *o;

LZWDECODER *pdecoder;

unsigned char arr[4096];

unsigned char arr2[4096];

size_t size;

pdecoder = (LZWDECODER*)malloc(sizeof(LZWDECODER));

i = fopen("C:\\Users\\XXXX\\Desktop\\a.lzw","rb");

o = fopen("C:\\Users\\XXXX\\Desktop\\b.bmp","wb");

if(i == NULL || o == NULL)

printf("error!\n");

LZWDecoder_Init(pdecoder,4096,arr2,LZW_PROC,o);

printf("decodeing ... \n");

while((size = fread(arr,1,4096,i)) > 0)

{

switch(LZWDecoder_Decode(pdecoder,size,arr))

{

case LZWDECODER_END:

printf("decode end! \n");

break;

case LZWDECODER_BUG:

printf("bug!\n");

break;

case LZWDECODER_OUTPUTERROR:

printf("writing error!\n");

break;

case LZWDECODER_CODEERROR:

printf("code error!\n");

break;

case LZWDECODER_DECODING:

continue;

}

break;

}

fclose(i);

fflush(o);

fclose(o);

system("pause");

free(pdecoder);

return 0;

}

本人比较懒 所以就写这样了