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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <alloy/string_buffer.h>
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#include <algorithm>
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#include <cstdarg>
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namespace alloy {
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StringBuffer::StringBuffer(size_t initial_capacity) {
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buffer_.reserve(std::max(initial_capacity, static_cast<size_t>(1024)));
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}
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StringBuffer::~StringBuffer() = default;
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void StringBuffer::Reset() { buffer_.resize(0); }
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void StringBuffer::Grow(size_t additional_length) {
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size_t old_capacity = buffer_.capacity();
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if (buffer_.size() + additional_length <= old_capacity) {
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return;
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}
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size_t new_capacity =
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std::max(buffer_.size() + additional_length, old_capacity * 2);
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buffer_.reserve(new_capacity);
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}
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void StringBuffer::Append(const std::string& value) {
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AppendBytes(reinterpret_cast<const uint8_t*>(value.data()), value.size());
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}
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void StringBuffer::Append(const char* format, ...) {
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va_list args;
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va_start(args, format);
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AppendVarargs(format, args);
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va_end(args);
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}
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void StringBuffer::AppendVarargs(const char* format, va_list args) {
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int length = vsnprintf(nullptr, 0, format, args);
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auto offset = buffer_.size();
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Grow(length + 1);
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buffer_.resize(buffer_.size() + length);
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vsnprintf(buffer_.data() + offset, buffer_.capacity() - 1, format, args);
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buffer_[buffer_.size()] = 0;
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}
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void StringBuffer::AppendBytes(const uint8_t* buffer, size_t length) {
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auto offset = buffer_.size();
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Grow(length + 1);
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buffer_.resize(buffer_.size() + length);
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memcpy(buffer_.data() + offset, buffer, length);
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buffer_[buffer_.size()] = 0;
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}
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const char* StringBuffer::GetString() const { return buffer_.data(); }
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char* StringBuffer::ToString() { return strdup(buffer_.data()); }
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} // namespace alloy
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