87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright 2017 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcrt/widetext_buffer.h"
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#include "core/fxcrt/fx_safe_types.h"
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#include "core/fxcrt/fx_system.h"
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namespace fxcrt {
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size_t WideTextBuffer::GetLength() const {
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return GetSize() / sizeof(wchar_t);
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}
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pdfium::span<wchar_t> WideTextBuffer::GetWideSpan() {
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return pdfium::make_span(reinterpret_cast<wchar_t*>(m_buffer.data()),
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GetLength());
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}
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pdfium::span<const wchar_t> WideTextBuffer::GetWideSpan() const {
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return pdfium::make_span(reinterpret_cast<const wchar_t*>(m_buffer.data()),
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GetLength());
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}
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WideStringView WideTextBuffer::AsStringView() const {
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return WideStringView(GetWideSpan());
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}
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WideString WideTextBuffer::MakeString() const {
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return WideString(AsStringView());
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}
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void WideTextBuffer::AppendChar(wchar_t ch) {
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pdfium::span<wchar_t> new_span = ExpandWideBuf(1);
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new_span[0] = ch;
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}
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void WideTextBuffer::Delete(size_t start_index, size_t count) {
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DeleteBuf(start_index * sizeof(wchar_t), count * sizeof(wchar_t));
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}
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void WideTextBuffer::AppendWideString(WideStringView str) {
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AppendSpan(pdfium::as_bytes(str.span()));
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}
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WideTextBuffer& WideTextBuffer::operator<<(ByteStringView ascii) {
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pdfium::span<wchar_t> new_span = ExpandWideBuf(ascii.GetLength());
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for (size_t i = 0; i < ascii.GetLength(); ++i)
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new_span[i] = ascii[i];
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return *this;
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}
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WideTextBuffer& WideTextBuffer::operator<<(WideStringView str) {
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AppendWideString(str);
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return *this;
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}
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WideTextBuffer& WideTextBuffer::operator<<(const WideString& str) {
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AppendWideString(str.AsStringView());
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return *this;
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}
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WideTextBuffer& WideTextBuffer::operator<<(const wchar_t* lpsz) {
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AppendWideString(WideStringView(lpsz));
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return *this;
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}
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WideTextBuffer& WideTextBuffer::operator<<(const WideTextBuffer& buf) {
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AppendWideString(buf.AsStringView());
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return *this;
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}
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pdfium::span<wchar_t> WideTextBuffer::ExpandWideBuf(size_t char_count) {
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size_t original_count = GetLength();
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FX_SAFE_SIZE_T safe_bytes = char_count;
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safe_bytes *= sizeof(wchar_t);
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size_t bytes = safe_bytes.ValueOrDie();
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ExpandBuf(bytes);
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m_DataSize += bytes;
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return GetWideSpan().subspan(original_count);
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}
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} // namespace fxcrt
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