SWCompress Class Reference

#include <swcomprs.h>

Inheritance diagram for SWCompress:

Collaboration diagram for SWCompress:

Public Member Functions
virtual void	decode (void)
virtual void	encode (void)
virtual unsigned long	getChars (char *buf, unsigned long len)
virtual char *	getCompressedBuf (unsigned long *len=0)
virtual int	getLevel ()
virtual char *	getUncompressedBuf (unsigned long *len=0)
virtual unsigned long	sendChars (char *buf, unsigned long len)
virtual void	setCompressedBuf (unsigned long *len, char *buf=0)
virtual void	setLevel (int l)
virtual void	setUncompressedBuf (const char *buf=0, unsigned long *len=0)
	SWCompress ()
virtual	~SWCompress ()

Protected Attributes
char *	buf
char	direct
int	level
unsigned long	pos
unsigned long	slen
char *	zbuf
unsigned long	zlen
unsigned long	zpos

Private Member Functions
void	cycleStream ()
void	init ()

Detailed Description

Definition at line 31 of file swcomprs.h.

Constructor & Destructor Documentation

SWORD_NAMESPACE_START SWCompress::SWCompress

(

)

Definition at line 35 of file swcomprs.cpp.

{
    buf = zbuf = 0;
    level = 6;
    init();
}

SWCompress::~SWCompress ( )

virtual

Definition at line 47 of file swcomprs.cpp.

{
    if (zbuf)
        free(zbuf);

    if (buf)
        free(buf);
}

Member Function Documentation

void SWCompress::cycleStream ( )

private

Definition at line 198 of file swcomprs.cpp.

                             {
    char buf[1024];
    unsigned long len, totlen = 0;

    do {
        len = getChars(buf, 1024);
        if (len)
            totlen += sendChars(buf, len);
    } while (len == 1024);

    zlen = slen = totlen;
}

void SWCompress::decode ( void  )

virtual

Reimplemented in XzCompress, ZipCompress, Bzip2Compress, and LZSSCompress.

Definition at line 193 of file swcomprs.cpp.

                            {
    cycleStream();
}

void SWCompress::encode ( void  )

virtual

Reimplemented in XzCompress, ZipCompress, Bzip2Compress, and LZSSCompress.

Definition at line 180 of file swcomprs.cpp.

                            {
    cycleStream();
}

unsigned long SWCompress::getChars ( char *  buf, unsigned long  len  )

virtual

Definition at line 121 of file swcomprs.cpp.

                                                                {
    if (direct) {
        len = (((zlen - zpos) > (unsigned)len) ? len : zlen - zpos);
        if (len > 0) {
            memmove(ibuf, &zbuf[zpos], len);
            zpos += len;
        }
    }
    else {
//      slen = strlen(buf);
        len = (((slen - pos) > (unsigned)len) ? len : slen - pos);
        if (len > 0) {
            memmove(ibuf, &buf[pos], len);
            pos += len;
        }
    }
    return len;
}

char * SWCompress::getCompressedBuf ( unsigned long *  len = 0 )

virtual

Definition at line 111 of file swcomprs.cpp.

                                                     {
    if (!zbuf) {
        direct = 0;
        encode();
    }
    if (len) *len = zlen;
    return zbuf;
}

virtual int SWCompress::getLevel ( )

inlinevirtual

Definition at line 54 of file swcomprs.h.

{return level;};

char * SWCompress::getUncompressedBuf ( unsigned long *  len = 0 )

virtual

Definition at line 90 of file swcomprs.cpp.

                                                       {
    if (!buf) {
        buf = (char *)calloc(1,1); // be sure we at least allocate an empty buf for return;
        direct = 1;
        decode();
    }
    if (len) *len = slen;
    return buf;
}

void SWCompress::init ( )

private

Definition at line 57 of file swcomprs.cpp.

{
        if (buf)
            free(buf);

        if (zbuf)
            free(zbuf);

        buf    = 0;
        zbuf   = 0;
        direct  = 0;
        zlen    = 0;
        slen    = 0;
        zpos    = 0;
        pos     = 0;
}

unsigned long SWCompress::sendChars ( char *  buf, unsigned long  len  )

virtual

Definition at line 141 of file swcomprs.cpp.

                                                                 {
    if (direct) {
        if (buf) {
//          slen = strlen(buf);
            if ((pos + len) > (unsigned)slen) {
                buf = (char *) realloc(buf, pos + len + 1024);
                memset(&buf[pos], 0, len + 1024);
            }
        }
        else    buf = (char *)calloc(1, len + 1024);
        memmove(&buf[pos], ibuf, len);
        pos += len;
    }
    else {
        if (zbuf) {
            if ((zpos + len) > zlen) {
                zbuf = (char *) realloc(zbuf, zpos + len + 1024);
                zlen = zpos + len + 1024;
            }
        }
        else {
            zbuf = (char *)calloc(1, len + 1024);
            zlen = len + 1024;
        }
        memmove(&zbuf[zpos], ibuf, len);
        zpos += len;
    }
    return len;
}

void SWCompress::setCompressedBuf ( unsigned long *  len, char *  buf = 0  )

virtual

Definition at line 101 of file swcomprs.cpp.

                                                                {
    if (ibuf) {
        init();
        zbuf = (char *) malloc(*len);
        memcpy(zbuf, ibuf, *len);
        zlen = *len;
    }
    *len = zlen;
}

virtual void SWCompress::setLevel ( int  l )

inlinevirtual

Reimplemented in XzCompress.

Definition at line 53 of file swcomprs.h.

{level = l;};

void SWCompress::setUncompressedBuf ( const char *  buf = 0, unsigned long *  len = 0  )

virtual

Definition at line 75 of file swcomprs.cpp.

                                                                        {
    if (ibuf) {
        init();
        slen = (len) ? *len : strlen(ibuf);
        buf = (char *) calloc(slen + 1, 1);
        memcpy(buf, ibuf, slen);
    }
    if (!buf) {
        buf = (char *)calloc(1,1); // be sure we at least allocate an empty buf for return;
        direct = 1;
        decode();
        if (len) *len = slen;
    }
}

Member Data Documentation

char* SWCompress::buf

mutableprotected

Definition at line 38 of file swcomprs.h.

char SWCompress::direct

mutableprotected

Definition at line 38 of file swcomprs.h.

int SWCompress::level

protected

Definition at line 40 of file swcomprs.h.

unsigned long SWCompress::pos

protected

Definition at line 39 of file swcomprs.h.

unsigned long SWCompress::slen

protected

Definition at line 39 of file swcomprs.h.

char * SWCompress::zbuf

mutableprotected

Definition at line 38 of file swcomprs.h.

unsigned long SWCompress::zlen

protected

Definition at line 39 of file swcomprs.h.

unsigned long SWCompress::zpos

protected

Definition at line 39 of file swcomprs.h.

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The documentation for this class was generated from the following files:

• include/swcomprs.h
• src/modules/common/swcomprs.cpp