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147 lines
3.3 KiB
C++
147 lines
3.3 KiB
C++
/* ioapi.c -- IO base function header for compress/uncompress .zip
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files using zlib + zip or unzip API
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Version 1.01e, February 12th, 2005
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Copyright (C) 1998-2005 Gilles Vollant
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Modified by Sergey A. Tachenov to integrate with Qt.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "zlib.h"
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#include "ioapi.h"
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#include "quazip_global.h"
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#include <QIODevice>
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/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
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#ifndef SEEK_CUR
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#define SEEK_CUR 1
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2
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#endif
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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voidpf ZCALLBACK qiodevice_open_file_func (
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voidpf opaque UNUSED,
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voidpf file,
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int mode)
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{
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(file);
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
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iodevice->open(QIODevice::ReadOnly);
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else
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if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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iodevice->open(QIODevice::ReadWrite);
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else
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if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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iodevice->open(QIODevice::WriteOnly);
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if (iodevice->isOpen()) {
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if (iodevice->isSequential()) {
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iodevice->close();
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return NULL;
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} else {
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return iodevice;
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}
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} else
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return NULL;
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}
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uLong ZCALLBACK qiodevice_read_file_func (
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voidpf opaque UNUSED,
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voidpf stream,
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void* buf,
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uLong size)
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{
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uLong ret;
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ret = (uLong)((QIODevice*)stream)->read((char*)buf,size);
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return ret;
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}
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uLong ZCALLBACK qiodevice_write_file_func (
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voidpf opaque UNUSED,
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voidpf stream,
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const void* buf,
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uLong size)
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{
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uLong ret;
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ret = (uLong)((QIODevice*)stream)->write((char*)buf,size);
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return ret;
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}
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uLong ZCALLBACK qiodevice_tell_file_func (
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voidpf opaque UNUSED,
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voidpf stream)
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{
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uLong ret;
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ret = ((QIODevice*)stream)->pos();
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return ret;
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}
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int ZCALLBACK qiodevice_seek_file_func (
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voidpf opaque UNUSED,
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voidpf stream,
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uLong offset,
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int origin)
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{
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uLong qiodevice_seek_result=0;
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int ret;
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switch (origin)
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{
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case ZLIB_FILEFUNC_SEEK_CUR :
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qiodevice_seek_result = ((QIODevice*)stream)->pos() + offset;
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break;
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case ZLIB_FILEFUNC_SEEK_END :
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qiodevice_seek_result = ((QIODevice*)stream)->size() - offset;
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break;
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case ZLIB_FILEFUNC_SEEK_SET :
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qiodevice_seek_result = offset;
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break;
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default: return -1;
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}
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ret = !((QIODevice*)stream)->seek(qiodevice_seek_result);
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return ret;
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}
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int ZCALLBACK qiodevice_close_file_func (
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voidpf opaque UNUSED,
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voidpf stream)
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{
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((QIODevice*)stream)->close();
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return 0;
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}
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int ZCALLBACK qiodevice_error_file_func (
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voidpf opaque UNUSED,
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voidpf stream)
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{
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// can't check for error due to the QIODevice API limitation
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return 0;
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}
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void fill_qiodevice_filefunc (
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zlib_filefunc_def* pzlib_filefunc_def)
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{
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pzlib_filefunc_def->zopen_file = qiodevice_open_file_func;
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pzlib_filefunc_def->zread_file = qiodevice_read_file_func;
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pzlib_filefunc_def->zwrite_file = qiodevice_write_file_func;
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pzlib_filefunc_def->ztell_file = qiodevice_tell_file_func;
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pzlib_filefunc_def->zseek_file = qiodevice_seek_file_func;
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pzlib_filefunc_def->zclose_file = qiodevice_close_file_func;
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pzlib_filefunc_def->zerror_file = qiodevice_error_file_func;
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pzlib_filefunc_def->opaque = NULL;
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}
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