From 2d0439faf537a922c88f8b3436b2d91eb9f70503 Mon Sep 17 00:00:00 2001 From: trialuser02 Date: Fri, 16 Sep 2016 08:13:14 +0000 Subject: added archive reader (first test implementation) git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@6727 90c681e8-e032-0410-971d-27865f9a5e38 --- src/plugins/Input/archive/archiveinputdevice.cpp | 52 ++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 src/plugins/Input/archive/archiveinputdevice.cpp (limited to 'src/plugins/Input/archive/archiveinputdevice.cpp') diff --git a/src/plugins/Input/archive/archiveinputdevice.cpp b/src/plugins/Input/archive/archiveinputdevice.cpp new file mode 100644 index 000000000..d9017ccda --- /dev/null +++ b/src/plugins/Input/archive/archiveinputdevice.cpp @@ -0,0 +1,52 @@ +#include "archiveinputdevice.h" + +ArchiveInputDevice::ArchiveInputDevice(archive *a, archive_entry *e, QObject *parent) : QIODevice(parent) +{ + m_archive = a; + m_entry = e; + open(QIODevice::ReadOnly); + m_buffer.open(QBuffer::ReadWrite); +} + +bool ArchiveInputDevice::seek(qint64 pos) +{ + QIODevice::seek(pos); + + if(pos > m_buffer.size()) + { + char tmp[1024]; + qint64 delta = pos - m_buffer.size(); + while (delta > 0) + { + qint64 r = qMin(qint64(sizeof(tmp)), delta); + r = archive_read_data(m_archive, tmp, r); + m_buffer.buffer().append(tmp, r); + delta -= r; + } + + } + + m_buffer.seek(pos); + return true; +} + +qint64 ArchiveInputDevice::size() const +{ + return archive_entry_size(m_entry); +} + +qint64 ArchiveInputDevice::readData(char *data, qint64 maxSize) +{ + if(m_buffer.atEnd()) + { + char tmp[maxSize]; + int r = archive_read_data(m_archive, tmp, maxSize); + m_buffer.buffer().append(tmp, r); + } + return m_buffer.read(data, maxSize); +} + +qint64 ArchiveInputDevice::writeData(const char *, qint64) +{ + return -1; +} -- cgit v1.2.3-13-gbd6f