/src/libtomahawk/thirdparty/quazip/quazip/qioapi.cpp

  1/* ioapi.c -- IO base function header for compress/uncompress .zip
  2   files using zlib + zip or unzip API
  3
  4   Version 1.01e, February 12th, 2005
  5
  6   Copyright (C) 1998-2005 Gilles Vollant
  7
  8   Modified by Sergey A. Tachenov to integrate with Qt.
  9*/
 10
 11#include <stdio.h>
 12#include <stdlib.h>
 13#include <string.h>
 14
 15#include "zlib.h"
 16#include "ioapi.h"
 17#include "quazip_global.h"
 18#include <QIODevice>
 19
 20
 21/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
 22
 23#ifndef SEEK_CUR
 24#define SEEK_CUR    1
 25#endif
 26
 27#ifndef SEEK_END
 28#define SEEK_END    2
 29#endif
 30
 31#ifndef SEEK_SET
 32#define SEEK_SET    0
 33#endif
 34
 35voidpf ZCALLBACK qiodevice_open_file_func (
 36   voidpf opaque UNUSED,
 37   voidpf file,
 38   int mode)
 39{
 40    QIODevice *iodevice = reinterpret_cast<QIODevice*>(file);
 41    if(iodevice->isSequential())
 42        return NULL;
 43    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
 44        iodevice->open(QIODevice::ReadOnly);
 45    else
 46    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
 47        iodevice->open(QIODevice::ReadWrite);
 48    else
 49    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
 50        iodevice->open(QIODevice::WriteOnly);
 51
 52    if(iodevice->isOpen())
 53        return iodevice;
 54    else
 55        return NULL;
 56}
 57
 58
 59uLong ZCALLBACK qiodevice_read_file_func (
 60   voidpf opaque UNUSED,
 61   voidpf stream,
 62   void* buf,
 63   uLong size)
 64{
 65    uLong ret;
 66    ret = (uLong)((QIODevice*)stream)->read((char*)buf,size);
 67    return ret;
 68}
 69
 70
 71uLong ZCALLBACK qiodevice_write_file_func (
 72   voidpf opaque UNUSED,
 73   voidpf stream,
 74   const void* buf,
 75   uLong size)
 76{
 77    uLong ret;
 78    ret = (uLong)((QIODevice*)stream)->write((char*)buf,size);
 79    return ret;
 80}
 81
 82uLong ZCALLBACK qiodevice_tell_file_func (
 83   voidpf opaque UNUSED,
 84   voidpf stream)
 85{
 86    uLong ret;
 87    ret = ((QIODevice*)stream)->pos();
 88    return ret;
 89}
 90
 91int ZCALLBACK qiodevice_seek_file_func (
 92   voidpf opaque UNUSED,
 93   voidpf stream,
 94   uLong offset,
 95   int origin)
 96{
 97    uLong qiodevice_seek_result=0;
 98    int ret;
 99    switch (origin)
100    {
101    case ZLIB_FILEFUNC_SEEK_CUR :
102        qiodevice_seek_result = ((QIODevice*)stream)->pos() + offset;
103        break;
104    case ZLIB_FILEFUNC_SEEK_END :
105        qiodevice_seek_result = ((QIODevice*)stream)->size() - offset;
106        break;
107    case ZLIB_FILEFUNC_SEEK_SET :
108        qiodevice_seek_result = offset;
109        break;
110    default: return -1;
111    }
112    ret = !((QIODevice*)stream)->seek(qiodevice_seek_result);
113    return ret;
114}
115
116int ZCALLBACK qiodevice_close_file_func (
117   voidpf opaque UNUSED,
118   voidpf stream)
119{
120    ((QIODevice*)stream)->close();
121    return 0;
122}
123
124int ZCALLBACK qiodevice_error_file_func (
125   voidpf opaque UNUSED,
126   voidpf stream)
127{
128    return !((QIODevice*)stream)->errorString().isEmpty();
129}
130
131void fill_qiodevice_filefunc (
132  zlib_filefunc_def* pzlib_filefunc_def)
133{
134    pzlib_filefunc_def->zopen_file = qiodevice_open_file_func;
135    pzlib_filefunc_def->zread_file = qiodevice_read_file_func;
136    pzlib_filefunc_def->zwrite_file = qiodevice_write_file_func;
137    pzlib_filefunc_def->ztell_file = qiodevice_tell_file_func;
138    pzlib_filefunc_def->zseek_file = qiodevice_seek_file_func;
139    pzlib_filefunc_def->zclose_file = qiodevice_close_file_func;
140    pzlib_filefunc_def->zerror_file = qiodevice_error_file_func;
141    pzlib_filefunc_def->opaque = NULL;
142}