blob: 9b9d438e9ca519590a3deb5290f002b908ca6ff2 [file] [log] [blame]
// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/widetext_buffer.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/span_util.h"
namespace fxcrt {
size_t WideTextBuffer::GetLength() const {
return GetSize() / sizeof(wchar_t);
}
pdfium::span<wchar_t> WideTextBuffer::GetWideSpan() {
return reinterpret_span<wchar_t>(GetMutableSpan());
}
pdfium::span<const wchar_t> WideTextBuffer::GetWideSpan() const {
return reinterpret_span<const wchar_t>(GetSpan());
}
WideStringView WideTextBuffer::AsStringView() const {
return WideStringView(GetWideSpan());
}
WideString WideTextBuffer::MakeString() const {
return WideString(AsStringView());
}
void WideTextBuffer::AppendChar(wchar_t ch) {
pdfium::span<wchar_t> new_span = ExpandWideBuf(1);
new_span[0] = ch;
}
void WideTextBuffer::Delete(size_t start_index, size_t count) {
DeleteBuf(start_index * sizeof(wchar_t), count * sizeof(wchar_t));
}
void WideTextBuffer::AppendWideString(WideStringView str) {
AppendSpan(pdfium::as_bytes(str.span()));
}
WideTextBuffer& WideTextBuffer::operator<<(ByteStringView ascii) {
pdfium::span<wchar_t> new_span = ExpandWideBuf(ascii.GetLength());
for (size_t i = 0; i < ascii.GetLength(); ++i)
new_span[i] = ascii[i];
return *this;
}
WideTextBuffer& WideTextBuffer::operator<<(WideStringView str) {
AppendWideString(str);
return *this;
}
WideTextBuffer& WideTextBuffer::operator<<(const WideString& str) {
AppendWideString(str.AsStringView());
return *this;
}
WideTextBuffer& WideTextBuffer::operator<<(const wchar_t* lpsz) {
AppendWideString(WideStringView(lpsz));
return *this;
}
WideTextBuffer& WideTextBuffer::operator<<(const WideTextBuffer& buf) {
AppendWideString(buf.AsStringView());
return *this;
}
pdfium::span<wchar_t> WideTextBuffer::ExpandWideBuf(size_t char_count) {
size_t original_count = GetLength();
FX_SAFE_SIZE_T safe_bytes = char_count;
safe_bytes *= sizeof(wchar_t);
size_t bytes = safe_bytes.ValueOrDie();
ExpandBuf(bytes);
m_DataSize += bytes;
return GetWideSpan().subspan(original_count);
}
} // namespace fxcrt