96 lines
2.7 KiB
C++
96 lines
2.7 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 "xenia/base/string_buffer.h"
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#include <algorithm>
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#include <cstdarg>
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#include "xenia/base/math.h"
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namespace xe {
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StringBuffer::StringBuffer(size_t initial_capacity) {
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buffer_capacity_ = std::max(initial_capacity, static_cast<size_t>(16 * 1024));
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buffer_ = reinterpret_cast<char*>(malloc(buffer_capacity_));
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buffer_[0] = 0;
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}
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StringBuffer::~StringBuffer() {
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free(buffer_);
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buffer_ = nullptr;
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}
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void StringBuffer::Reset() {
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buffer_offset_ = 0;
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buffer_[0] = 0;
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}
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void StringBuffer::Grow(size_t additional_length) {
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if (buffer_offset_ + additional_length <= buffer_capacity_) {
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return;
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}
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size_t old_capacity = buffer_capacity_;
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size_t new_capacity =
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std::max(xe::round_up(buffer_offset_ + additional_length, 16 * 1024),
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old_capacity * 2);
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buffer_ = reinterpret_cast<char*>(realloc(buffer_, new_capacity));
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buffer_capacity_ = new_capacity;
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}
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void StringBuffer::Append(char c) {
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AppendBytes(reinterpret_cast<const uint8_t*>(&c), 1);
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}
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void StringBuffer::Append(const char* value) {
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AppendBytes(reinterpret_cast<const uint8_t*>(value), std::strlen(value));
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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::AppendFormat(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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Grow(length + 1);
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vsnprintf(buffer_ + buffer_offset_, buffer_capacity_, format, args);
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buffer_offset_ += length;
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buffer_[buffer_offset_] = 0;
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}
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void StringBuffer::AppendBytes(const uint8_t* buffer, size_t length) {
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Grow(length + 1);
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memcpy(buffer_ + buffer_offset_, buffer, length);
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buffer_offset_ += length;
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buffer_[buffer_offset_] = 0;
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}
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const char* StringBuffer::GetString() const { return buffer_; }
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std::string StringBuffer::to_string() {
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return std::string(buffer_, buffer_offset_);
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}
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char* StringBuffer::ToString() { return strdup(buffer_); }
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std::vector<uint8_t> StringBuffer::ToBytes() const {
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std::vector<uint8_t> bytes(buffer_offset_);
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std::memcpy(bytes.data(), buffer_, buffer_offset_);
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return bytes;
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}
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} // namespace xe
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