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Diffstat (limited to 'src/tag_find.cpp')
| -rw-r--r-- | src/tag_find.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/tag_find.cpp b/src/tag_find.cpp new file mode 100644 index 0000000..daad671 --- /dev/null +++ b/src/tag_find.cpp @@ -0,0 +1,189 @@ +// $Id: tag_find.cpp,v 1.28 2003/03/02 14:39:25 t1mpy Exp $ + +// id3lib: a C++ library for creating and manipulating id3v1/v2 tags +// Copyright 1999, 2000 Scott Thomas Haug + +// This library is free software; you can redistribute it and/or modify it +// under the terms of the GNU Library General Public License as published by +// the Free Software Foundation; either version 2 of the License, or (at your +// option) any later version. +// +// This library is distributed in the hope that it will be useful, but WITHOUT +// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +// License for more details. +// +// You should have received a copy of the GNU Library General Public License +// along with this library; if not, write to the Free Software Foundation, +// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +// The id3lib authors encourage improvements and optimisations to be sent to +// the id3lib coordinator. Please see the README file for details on where to +// send such submissions. See the AUTHORS file for a list of people who have +// contributed to id3lib. See the ChangeLog file for a list of changes to +// id3lib. These files are distributed with id3lib at +// http://download.sourceforge.net/id3lib/ + +#include "tag_impl.h" //has <stdio.h> "tag.h" "header_tag.h" "frame.h" "field.h" "spec.h" "id3lib_strings.h" "utils.h" + +using namespace dami; + +ID3_TagImpl::const_iterator ID3_TagImpl::Find(const ID3_Frame *frame) const +{ + const_iterator cur = _frames.begin(); + + for (; cur != _frames.end(); ++cur) + { + if (*cur == frame) + { + break; + } + } + + return cur; +} + +ID3_TagImpl::iterator ID3_TagImpl::Find(const ID3_Frame *frame) +{ + iterator cur = _frames.begin(); + + for (; cur != _frames.end(); ++cur) + { + if (*cur == frame) + { + break; + } + } + + return cur; +} + +ID3_Frame *ID3_TagImpl::Find(ID3_FrameID id) const +{ + ID3_Frame *frame = NULL; + + // reset the cursor if it isn't set + if (_frames.end() == _cursor) + { + _cursor = _frames.begin(); + } + + + for (int iCount = 0; iCount < 2 && frame == NULL; iCount++) + { + // We want to cycle through the list to find the matching frame. We + // should begin from the cursor, search each successive frame, wrapping + // if necessary. The enclosing loop and the assignment statments below + // ensure that we first begin at the cursor and search to the end of the + // list and, if unsuccessful, start from the beginning of the list and + // search to the cursor. + const_iterator + begin = (0 == iCount ? _cursor : _frames.begin()), + end = (0 == iCount ? _frames.end() : _cursor); + // search from the cursor to the end + for (const_iterator cur = begin; cur != end; ++cur) + { + if ((*cur != NULL) && ((*cur)->GetID() == id)) + { + // We've found a valid frame. Set the cursor to be the next element + frame = *cur; + _cursor = ++cur; + break; + } + } + } + + return frame; +} + +ID3_Frame *ID3_TagImpl::Find(ID3_FrameID id, ID3_FieldID fldID, const char* data, ID3_TextEnc sourceEnc) const +{ + ID3_Frame *frame = NULL; + ID3D_NOTICE( "Find: looking for comment with data = " << data.c_str() ); + + // reset the cursor if it isn't set + if (_frames.end() == _cursor) + { + _cursor = _frames.begin(); + ID3D_NOTICE( "Find: resetting cursor" ); + } + + for (int iCount = 0; iCount < 2 && frame == NULL; iCount++) + { + ID3D_NOTICE( "Find: iCount = " << iCount ); + // We want to cycle through the list to find the matching frame. We + // should begin from the cursor, search each successive frame, wrapping + // if necessary. The enclosing loop and the assignment statments below + // ensure that we first begin at the cursor and search to the end of the + // list and, if unsuccessful, start from the beginning of the list and + // search to the cursor. + const_iterator + begin = (0 == iCount ? _cursor : _frames.begin()), + end = (0 == iCount ? _frames.end() : _cursor); + // search from the cursor to the end + for (const_iterator cur = begin; cur != end; ++cur) + { + ID3D_NOTICE( "Find: frame = " << iCount << (uint32) *cur ); + if ((*cur != NULL) && ((*cur)->GetID() == id) && + (*cur)->Contains(fldID)) + { + ID3_Field* fld = (*cur)->GetField(fldID); + if (NULL == fld) + { + continue; + ID3D_NOTICE( "Find: didn't have the right field" ); + } + + if ( data == fld->GetText(sourceEnc) ) // bug, does only look in the first text item! + { + // We've found a valid frame. Set cursor to be the next element + frame = *cur; + _cursor = ++cur; + break; + } + } + } + } + + return frame; +} + + +ID3_Frame *ID3_TagImpl::Find(ID3_FrameID id, ID3_FieldID fldID, uint32 data) const +{ + ID3_Frame *frame = NULL; + + // reset the cursor if it isn't set + if (_frames.end() == _cursor) + { + _cursor = _frames.begin(); + } + + for (int iCount = 0; iCount < 2 && frame == NULL; iCount++) + { + // We want to cycle through the list to find the matching frame. We + // should begin from the cursor, search each successive frame, wrapping + // if necessary. The enclosing loop and the assignment statments below + // ensure that we first begin at the cursor and search to the end of the + // list and, if unsuccessful, start from the beginning of the list and + // search to the cursor. + const_iterator + begin = (0 == iCount ? _cursor : _frames.begin()), + end = (0 == iCount ? _frames.end() : _cursor); + // search from the cursor to the end + for (const_iterator cur = begin; cur != end; ++cur) + { + if ((*cur != NULL) && ((*cur)->GetID() == id) && + ((*cur)->GetField(fldID)->Get() == data)) + { + // We've found a valid frame. Set the cursor to be the next element + frame = *cur; + _cursor = ++cur; + break; + } + } + } + + return frame; +} + |