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#pragma once
#include "types.hpp"
#include <cstring>
#include <cassert>
namespace dchat
{
template <typename CharType>
class BasicStringView
{
public:
BasicStringView() : data(nullptr), size(0)
{
}
BasicStringView(const BasicStringView<CharType> &other) : data(other.data), size(other.size)
{
}
BasicStringView(const CharType *_data) : data(_data), size(strlen(_data))
{
}
BasicStringView(const CharType *_data, usize _size) : data(_data), size(_size)
{
}
BasicStringView<CharType>& operator = (const BasicStringView<CharType> &other)
{
data = other.data;
size = other.size;
return *this;
}
BasicStringView(BasicStringView<CharType> &&other)
{
data = other.data;
size = other.size;
other.data = nullptr;
other.size = 0;
}
bool equals(const BasicStringView<CharType> &other) const
{
if(size != other.size) return false;
return memcmp(data, other.data, size * sizeof(CharType)) == 0;
}
bool operator == (const BasicStringView<CharType> &other) const
{
return equals(other);
}
bool operator != (const BasicStringView<CharType> &other) const
{
return !equals(other);
}
CharType operator [] (usize index) const
{
assert(index < size);
return data[index];
}
// Returns -1 if substr not found.
// TODO: Make this more efficient
usize find(const BasicStringView<CharType> &substr, usize offset = 0) const
{
if(substr.size == 0)
return -1;
if(offset + substr.size > size)
return -1;
for(usize i = offset; i < size - (substr.size - 1); ++i)
{
if(memcmp(data + i, substr.data, substr.size) == 0)
return i;
}
return -1;
}
const CharType *data;
usize size;
};
using StringView = BasicStringView<char>;
using StringViewUtf32 = BasicStringView<u32>;
}
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