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Comprimir y descomprimir en FWPPC

Posted: Thu Jan 11, 2007 11:58 am
by jlcapel
Hola a todos,

Os dejo dos funciones para la compresión y descompresión de ficheros en la PDA.

Estas dos funciones utilizan la librería zlibce (http://www.zlib.net) que es de libre uso y distribución (mirad la licencia).

Para compilar las funciones necesitais añadir a vuestro proyecto la librería zlibce.lib. Además debeis tener accesible en vuestro 'path include' el fichero #include "zlib.h"

Para utilizar estas funciones en vuestra aplicación necesitais copiar el fichero zlibce.dll o bien en la carpeta de la aplicación o bien en la carpeta de windows de la PDA.

Aquí: http://www.tenik.co.jp/~adachi/wince/zlibce/index.html podeis bajaros todo lo necesario (es la tercera opción).

Saludos,
José Luis Capel

Code: Select all

function Main()

LOCAL a


IF !Comprime(CurDir()+"\module1.prg",CurDir()+"\pepe.zip")
   MsgInfo("Error en compresión")
ENDIF


IF !DesComprime(CurDir()+"\pepe.zip",CurDir()+"\modulo2.prg")
   MsgInfo("Error en descompresión")
ENDIF

RETURN NIL


#pragma BEGINDUMP

#include <hbapi.h>
#include <windows.h>
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>
#include "zlib.h"

#define CHUNK 16384


int AicomComprime(FILE *source, FILE *dest, int level);
int AicomDescomprime(FILE *source, FILE *dest);

HB_FUNC( COMPRIME )
{

                int nResult;
	char * sOrigen;
	char * sDestino;

	FILE * fOrigen;
	FILE * fDestino;

	sOrigen  = hb_parc(1);
	sDestino = hb_parc(2);


	// Abrimos fichero origen
	if ( (fOrigen = fopen( sOrigen, "r+b" )) == NULL )
		{
		hb_retl(FALSE);
		return;
		}



	// Abrimos fichero destino
	if ( (fDestino = fopen( sDestino, "w+b" )) == NULL )
		{
		fclose(fOrigen);
		hb_retl(FALSE);
		return;
		}


        nResult = AicomComprime(  fOrigen, fDestino, 1 );
        switch( nResult )
        	{
        	case Z_MEM_ERROR:
		        hb_retl(FALSE);
        		MessageBox(NULL,L"Error Memoria",L"Zlib",MB_OK);
        		break;
        	case Z_STREAM_ERROR:
		        hb_retl(FALSE);
        		MessageBox(NULL,L"Error Stream",L"Zlib",MB_OK);
        		break;
        	case Z_VERSION_ERROR:
		        hb_retl(FALSE);
        		MessageBox(NULL,L"Error Version",L"Zlib",MB_OK);
        		break;
        	case Z_ERRNO:
		        hb_retl(FALSE);
        		MessageBox(NULL,L"Error R/W",L"Zlib",MB_OK);
        		break;

                }

        fclose(fOrigen);
        fclose(fDestino);


        hb_retl(TRUE);


}


HB_FUNC( DESCOMPRIME )
{
                int nResult;
	char * sOrigen;
	char * sDestino;

	FILE * fOrigen;
	FILE * fDestino;

	sOrigen  = hb_parc(1);
	sDestino = hb_parc(2);


	// Abrimos fichero origen
	if ( (fOrigen = fopen( sOrigen, "r+b" )) == NULL )
		{
		hb_retl(FALSE);
		return;
		}



	// Abrimos fichero destino
	if ( (fDestino = fopen( sDestino, "w+b" )) == NULL )
		{
		fclose(fOrigen);
		hb_retl(FALSE);
		return;
		}


        nResult = AicomDescomprime(  fOrigen, fDestino );
        switch( nResult )
        	{
        	case Z_MEM_ERROR:
        		MessageBox(NULL,L"Error Memoria",L"Zlib",MB_OK);
		        hb_retl(FALSE);
        		break;
        	case Z_STREAM_ERROR:
        		MessageBox(NULL,L"Error Stream",L"Zlib",MB_OK);
		        hb_retl(FALSE);
        		break;
        	case Z_VERSION_ERROR:
        		MessageBox(NULL,L"Error Version",L"Zlib",MB_OK);
		        hb_retl(FALSE);
        		break;
        	case Z_ERRNO:
		        hb_retl(FALSE);
        		MessageBox(NULL,L"Error R/W",L"Zlib",MB_OK);
        		break;
                }

        fclose(fOrigen);
        fclose(fDestino);

        hb_retl(TRUE);


}


int AicomComprime(FILE *source, FILE *dest, int level)
{

   int ret, flush;
    unsigned have;
    z_stream strm;
    unsigned char in[CHUNK];
    unsigned char out[CHUNK];

    TCHAR szError[512];

    /* allocate deflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    ret = deflateInit(&strm, level);
    if (ret != Z_OK)
        return ret;


    /* compress until end of file */
    do {
       strm.avail_in = fread(in, sizeof(unsigned char), CHUNK, source);
        if (ferror(source)) {
            (void)deflateEnd(&strm);
            return Z_ERRNO;
        }
        flush = feof(source) ? Z_FINISH : Z_NO_FLUSH;
        strm.next_in = in;

        /* run deflate() on input until output buffer not full, finish
           compression if all of source has been read in */
        do {
            strm.avail_out = CHUNK;
            strm.next_out = out;
            ret = deflate(&strm, flush);    /* no bad return value */
            assert(ret != Z_STREAM_ERROR);  /* state not clobbered */
            have = CHUNK - strm.avail_out;
            if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
                (void)deflateEnd(&strm);
                return Z_ERRNO;
            }


       } while (strm.avail_out == 0);
        assert(strm.avail_in == 0);     /* all input will be used */

      /* done when last data in file processed */
    } while (flush != Z_FINISH);
    assert(ret == Z_STREAM_END);        /* stream will be complete */
   /* clean up and return */
    (void)deflateEnd(&strm);
    return Z_OK;
}




int AicomDescomprime(FILE *source, FILE *dest)
{
    int ret;
    unsigned have;
    z_stream strm;
    unsigned char in[CHUNK];
    unsigned char out[CHUNK];


    /* allocate inflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    strm.avail_in = 0;
    strm.next_in = Z_NULL;
    ret = inflateInit(&strm);
    if (ret != Z_OK)
        return ret;


    /* decompress until deflate stream ends or end of file */
    do {

        strm.avail_in = fread(in, 1, CHUNK, source);
        if (ferror(source)) {
            (void)inflateEnd(&strm);
            return Z_ERRNO;
        }
        if (strm.avail_in == 0)
            break;
        strm.next_in = in;

        /* run inflate() on input until output buffer not full */
        do {

            strm.avail_out = CHUNK;
            strm.next_out = out;
            ret = inflate(&strm, Z_NO_FLUSH);
            assert(ret != Z_STREAM_ERROR);  /* state not clobbered */
            switch (ret) {
            case Z_NEED_DICT:
                ret = Z_DATA_ERROR;     /* and fall through */
            case Z_DATA_ERROR:
            case Z_MEM_ERROR:
                (void)inflateEnd(&strm);
                return ret;
            }


            have = CHUNK - strm.avail_out;
            if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
                (void)inflateEnd(&strm);
                return Z_ERRNO;
            }


        } while (strm.avail_out == 0);

        /* done when inflate() says it's done */
    } while (ret != Z_STREAM_END);

    /* clean up and return */
    (void)inflateEnd(&strm);
    return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
}




#pragma ENDDUMP

Posted: Mon Mar 12, 2007 1:51 pm
by vilian
Hi,

The generated archives ZIP in the WindowsCE are not compatible with those generated in the WindowsXp?

Posted: Fri Jun 29, 2007 3:47 pm
by pymsoft
Alguna novedad?


Saludos

Posted: Wed Aug 06, 2008 8:21 am
by xfood
does not work,
someone is able to fix the problem?