53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#include "PieceTable.h"
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PieceTable::PieceTable(const uint8_t * file_buffer, unsigned long file_buffer_size)
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{
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m_file_buffer = file_buffer;
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m_file_buffer_size = file_buffer_size;
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start_piece = &m_pieces[PIECE_INDEX_START];
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end_piece = &m_pieces[PIECE_INDEX_END];
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start_piece->next = end_piece;
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end_piece->prev = start_piece;
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m_piece_index = 2u;
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}
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void PieceTable::append_initial_line_piece(uint8_t * start, uint32_t length, bool eol)
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{
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Piece * piece = add_piece();
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piece->prev = end_piece->prev;
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piece->next = end_piece;
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piece->start = start;
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piece->length = length;
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piece->flags = 0u;
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if (eol)
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piece->flags |= Piece::EOL_FLAG;
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end_piece->prev->next = piece;
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end_piece->prev = piece;
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m_num_lines++;
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}
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PieceTable::Piece * PieceTable::get_start_of_line(PieceTable::Piece * start) const
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{
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Piece * piece = start;
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while (piece->prev != start_piece && !piece->prev->eol())
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{
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piece = piece->prev;
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}
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return piece;
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}
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std::shared_ptr<PieceTable::Cursor> PieceTable::add_cursor()
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{
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auto cursor = std::make_shared<Cursor>();
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cursor->piece = start_piece->next;
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cursor->line_number = 1u;
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cursor->offset = 0u;
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m_cursors.push_back(cursor);
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return cursor;
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}
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