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#include "AKString.h"
#include "StdLibExtras.h"
namespace AK {
bool String::operator==(const String& other) const
{
if (!m_impl)
return !other.m_impl;
if (!other.m_impl)
return false;
if (length() != other.length())
return false;
return !memcmp(characters(), other.characters(), length());
}
String String::empty()
{
return StringImpl::the_empty_stringimpl();
}
String String::isolated_copy() const
{
if (!m_impl)
return { };
if (!m_impl->length())
return empty();
char* buffer;
auto impl = StringImpl::create_uninitialized(length(), buffer);
memcpy(buffer, m_impl->characters(), m_impl->length());
return String(move(*impl));
}
String String::substring(size_t start, size_t length) const
{
ASSERT(m_impl);
ASSERT(start + length <= m_impl->length());
// FIXME: This needs some input bounds checking.
char* buffer;
auto newImpl = StringImpl::create_uninitialized(length, buffer);
memcpy(buffer, characters() + start, length);
buffer[length] = '\0';
return newImpl;
}
Vector<String> String::split(const char separator) const
{
if (is_empty())
return { };
Vector<String> v;
size_t substart = 0;
for (size_t i = 0; i < length(); ++i) {
char ch = characters()[i];
if (ch == separator) {
size_t sublen = i - substart;
if (sublen != 0)
v.append(substring(substart, sublen));
substart = i + 1;
}
}
size_t taillen = length() - substart;
if (taillen != 0)
v.append(substring(substart, taillen));
if (characters()[length() - 1] == separator)
v.append(empty());
return v;
}
ByteBuffer String::to_byte_buffer() const
{
if (!m_impl)
return nullptr;
return ByteBuffer::copy(reinterpret_cast<const byte*>(characters()), length());
}
unsigned String::toUInt(bool& ok) const
{
unsigned value = 0;
for (size_t i = 0; i < length(); ++i) {
if (characters()[i] < '0' || characters()[i] > '9') {
ok = false;
return 0;
}
value = value * 10;
value += characters()[i] - '0';
}
ok = true;
return value;
}
}
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