Imported existing sources
This commit is contained in:
0xFEEDC0DE64
363
qioapi.cpp
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363
qioapi.cpp
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/* 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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#if (QT_VERSION >= 0x050100)
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#define QUAZIP_QSAVEFILE_BUG_WORKAROUND
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#endif
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#ifdef QUAZIP_QSAVEFILE_BUG_WORKAROUND
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#include <QSaveFile>
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#endif
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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 call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,voidpf file,int mode)
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{
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if (pfilefunc->zfile_func64.zopen64_file != NULL)
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return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,file,mode);
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else
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{
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return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,file,mode);
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}
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}
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int call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
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{
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
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else
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{
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uLong offsetTruncated = (uLong)offset;
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if (offsetTruncated != offset)
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return -1;
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else
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return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
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}
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}
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ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
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{
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
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else
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{
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uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
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if ((tell_uLong) == ((uLong)-1))
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return (ZPOS64_T)-1;
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else
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return tell_uLong;
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}
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}
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/// @cond internal
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struct QIODevice_descriptor {
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// Position only used for writing to sequential devices.
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qint64 pos;
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inline QIODevice_descriptor():
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pos(0)
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{}
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};
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/// @endcond
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voidpf ZCALLBACK qiodevice_open_file_func (
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voidpf opaque,
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voidpf file,
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int mode)
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{
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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(file);
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QIODevice::OpenMode desiredMode;
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
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desiredMode = QIODevice::ReadOnly;
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else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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desiredMode = QIODevice::ReadWrite;
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else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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desiredMode = QIODevice::WriteOnly;
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if (iodevice->isOpen()) {
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if ((iodevice->openMode() & desiredMode) == desiredMode) {
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if (desiredMode != QIODevice::WriteOnly
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&& iodevice->isSequential()) {
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// We can use sequential devices only for writing.
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delete d;
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return NULL;
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} else {
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if ((desiredMode & QIODevice::WriteOnly) != 0) {
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// open for writing, need to seek existing device
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if (!iodevice->isSequential()) {
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iodevice->seek(0);
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} else {
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d->pos = iodevice->pos();
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}
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}
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}
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return iodevice;
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} else {
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delete d;
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return NULL;
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}
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}
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iodevice->open(desiredMode);
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if (iodevice->isOpen()) {
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if (desiredMode != QIODevice::WriteOnly && iodevice->isSequential()) {
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// We can use sequential devices only for writing.
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iodevice->close();
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delete d;
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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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delete d;
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return NULL;
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}
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}
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uLong ZCALLBACK qiodevice_read_file_func (
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voidpf opaque,
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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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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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qint64 ret64 = iodevice->read((char*)buf,size);
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uLong ret;
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ret = (uLong) ret64;
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if (ret64 != -1) {
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d->pos += ret64;
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}
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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,
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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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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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uLong ret;
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qint64 ret64 = iodevice->write((char*)buf,size);
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if (ret64 != -1) {
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d->pos += ret64;
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}
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ret = (uLong) ret64;
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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,
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voidpf stream)
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{
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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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uLong ret;
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qint64 ret64;
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if (iodevice->isSequential()) {
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ret64 = d->pos;
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} else {
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ret64 = iodevice->pos();
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}
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ret = static_cast<uLong>(ret64);
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return ret;
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}
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ZPOS64_T ZCALLBACK qiodevice64_tell_file_func (
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voidpf opaque,
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voidpf stream)
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{
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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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qint64 ret;
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if (iodevice->isSequential()) {
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ret = d->pos;
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} else {
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ret = iodevice->pos();
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}
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return static_cast<ZPOS64_T>(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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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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if (iodevice->isSequential()) {
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if (origin == ZLIB_FILEFUNC_SEEK_END
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&& offset == 0) {
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// sequential devices are always at end (needed in mdAppend)
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return 0;
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} else {
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qWarning("qiodevice_seek_file_func() called for sequential device");
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return -1;
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}
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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:
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return -1;
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}
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ret = !iodevice->seek(qiodevice_seek_result);
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return ret;
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}
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int ZCALLBACK qiodevice64_seek_file_func (
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voidpf /*opaque UNUSED*/,
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voidpf stream,
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ZPOS64_T offset,
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int origin)
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{
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QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
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if (iodevice->isSequential()) {
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if (origin == ZLIB_FILEFUNC_SEEK_END
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&& offset == 0) {
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// sequential devices are always at end (needed in mdAppend)
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return 0;
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} else {
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qWarning("qiodevice_seek_file_func() called for sequential device");
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return -1;
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}
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}
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qint64 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:
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return -1;
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}
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ret = !iodevice->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,
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voidpf stream)
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{
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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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delete d;
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QIODevice *device = reinterpret_cast<QIODevice*>(stream);
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#ifdef QUAZIP_QSAVEFILE_BUG_WORKAROUND
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// QSaveFile terribly breaks the is-a idiom:
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// it IS a QIODevice, but it is NOT compatible with it: close() is private
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QSaveFile *file = qobject_cast<QSaveFile*>(device);
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if (file != NULL) {
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// We have to call the ugly commit() instead:
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return file->commit() ? 0 : -1;
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}
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#endif
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device->close();
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return 0;
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}
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int ZCALLBACK qiodevice_fakeclose_file_func (
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voidpf opaque,
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voidpf /*stream*/)
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{
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QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
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delete d;
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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 UNUSED*/)
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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 = new QIODevice_descriptor;
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}
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void fill_qiodevice64_filefunc (
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zlib_filefunc64_def* pzlib_filefunc_def)
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{
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// Open functions are the same for Qt.
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pzlib_filefunc_def->zopen64_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->ztell64_file = qiodevice64_tell_file_func;
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pzlib_filefunc_def->zseek64_file = qiodevice64_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 = new QIODevice_descriptor;
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pzlib_filefunc_def->zfakeclose_file = qiodevice_fakeclose_file_func;
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}
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void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
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{
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p_filefunc64_32->zfile_func64.zopen64_file = NULL;
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p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
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p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
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p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
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p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
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p_filefunc64_32->zfile_func64.ztell64_file = NULL;
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p_filefunc64_32->zfile_func64.zseek64_file = NULL;
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p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
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p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
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p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
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p_filefunc64_32->zfile_func64.zfakeclose_file = NULL;
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p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
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p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
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}
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