105 lines
2.4 KiB
C++
105 lines
2.4 KiB
C++
#pragma once
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#include "memory.hpp"
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#include <cstdarg>
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#include <cstdint>
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template <class Type, size_t n>
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constexpr auto ARRAY_COUNT(Type(&)[n]) { return n; }
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namespace utils::string
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{
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template <size_t Buffers, size_t MinBufferSize>
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class va_provider final
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{
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public:
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static_assert(Buffers != 0 && MinBufferSize != 0, "Buffers and MinBufferSize mustn't be 0");
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va_provider() : current_buffer_(0)
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{
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}
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char* get(const char* format, const va_list ap)
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{
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++this->current_buffer_ %= ARRAY_COUNT(this->string_pool_);
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auto entry = &this->string_pool_[this->current_buffer_];
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if (!entry->size_ || !entry->buffer_)
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{
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throw std::runtime_error("String pool not initialized");
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}
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while (true)
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{
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va_list ap_copy;
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va_copy(ap_copy, ap);
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const auto res = vsnprintf_s(entry->buffer_, entry->size_, _TRUNCATE, format, ap_copy);
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va_end(ap_copy);
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if (res > 0) break; // Success
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if (res == 0) return nullptr; // Error
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entry->double_size();
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}
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return entry->buffer_;
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}
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private:
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class entry final
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{
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public:
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explicit entry(const size_t size = MinBufferSize) : size_(size), buffer_(nullptr)
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{
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if (this->size_ < MinBufferSize) this->size_ = MinBufferSize;
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this->allocate();
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}
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~entry()
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{
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if (this->buffer_) memory::get_allocator()->free(this->buffer_);
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this->size_ = 0;
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this->buffer_ = nullptr;
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}
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void allocate()
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{
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if (this->buffer_) memory::get_allocator()->free(this->buffer_);
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this->buffer_ = memory::get_allocator()->allocate_array<char>(this->size_ + 1);
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}
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void double_size()
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{
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this->size_ *= 2;
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this->allocate();
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}
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size_t size_;
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char* buffer_;
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};
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size_t current_buffer_;
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entry string_pool_[Buffers];
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};
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const char* va(const char* fmt, ...);
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std::vector<std::string> split(const std::string& s, char delim);
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std::string to_lower(const std::string& text);
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std::string to_upper(const std::string& text);
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bool starts_with(const std::string& text, const std::string& substring);
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bool ends_with(const std::string& text, const std::string& substring);
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std::string dump_hex(const std::string& data, const std::string& separator = " ");
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std::string get_clipboard_data();
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void strip(const char* in, char* out, size_t max);
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std::string convert(const std::wstring& wstr);
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std::wstring convert(const std::string& str);
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std::string replace(std::string str, const std::string& from, const std::string& to);
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}
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