--- /dev/null
+// ***************************************************************************
+// BamFile_p.cpp (c) 2011 Derek Barnett
+// Marth Lab, Department of Biology, Boston College
+// ---------------------------------------------------------------------------
+// Last modified: 8 September 2011 (DB)
+// ---------------------------------------------------------------------------
+// Provides reading of local BAM files
+// ***************************************************************************
+
+#include <api/internal/BamFile_p.h>
+using namespace BamTools;
+using namespace BamTools::Internal;
+
+#include <cstdio>
+using namespace std;
+
+BamFile::BamFile(const string& filename)
+ : IBamIODevice()
+ , m_stream(0)
+ , m_filename(filename)
+{ }
+
+BamFile::~BamFile(void) {
+ Close();
+}
+
+void BamFile::Close(void) {
+
+ // skip if not open
+ if ( !IsOpen() )
+ return;
+
+ // flush & close FILE*
+ fflush(m_stream);
+ fclose(m_stream);
+
+ // reset internals
+ m_mode = IBamIODevice::NotOpen;
+ m_stream = 0;
+ m_filename.clear();
+}
+
+bool BamFile::IsRandomAccess(void) const {
+ return true;
+}
+
+bool BamFile::Open(const IBamIODevice::OpenMode mode) {
+
+ // make sure we're starting with a fresh file stream
+ Close();
+
+ // attempt to open FILE* depending on requested openmode
+ if ( mode == IBamIODevice::ReadOnly )
+ m_stream = fopen(m_filename.c_str(), "rb");
+ else if ( mode == IBamIODevice::WriteOnly )
+ m_stream = fopen(m_filename.c_str(), "wb");
+ else {
+ SetErrorString("BamFile ERROR - unknown device open mode");
+ return false;
+ }
+
+ // check that we obtained a valid FILE*
+ if ( m_stream == 0 ) {
+ string error = "BamFile ERROR - could not open handle on ";
+ error += ( (m_filename.empty()) ? "empty filename" : m_filename );
+ SetErrorString(error);
+ return false;
+ }
+
+ // store current IO mode & return success
+ m_mode = mode;
+ return true;
+}
+
+size_t BamFile::Read(char* data, const unsigned int numBytes) {
+ BT_ASSERT_X( m_stream, "BamFile::Read() - null stream" );
+ BT_ASSERT_X( (m_mode == IBamIODevice::ReadOnly), "BamFile::Read() - device not in read-only mode");
+ return fread(data, sizeof(char), numBytes, m_stream);
+}
+
+bool BamFile::Seek(const int64_t& position) {
+ BT_ASSERT_X( m_stream, "BamFile::Seek() - null stream" );
+ return ( fseek64(m_stream, position, SEEK_SET) == 0);
+}
+
+int64_t BamFile::Tell(void) const {
+ BT_ASSERT_X( m_stream, "BamFile::Tell() - null stream" );
+ return ftell64(m_stream);
+}
+
+size_t BamFile::Write(const char* data, const unsigned int numBytes) {
+ BT_ASSERT_X( m_stream, "BamFile::Write() - null stream" );
+ BT_ASSERT_X( (m_mode == IBamIODevice::WriteOnly), "BamFile::Write() - device not in write-only mode" );
+ return fwrite(data, sizeof(char), numBytes, m_stream);
+}