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#include <StringTokenizer.h>
StringTokenizer::StringTokenizer(const std::string& tokens_line, const std::string& tokens_delimiter):
line(tokens_line),
delimiter(tokens_delimiter)
{
length = line.length();
find_next_token();
}
bool StringTokenizer::has_next()
{
return have_token;
}
// @throws std::bad_alloc, std::out_of_range
std::string StringTokenizer::next()
{
if (!have_token)
{
throw std::out_of_range("StringTokenizer.next() called, but no more tokens are available");
}
// Save current token substring parameters
size_t cur_offset = token_offset;
size_t cur_length = token_length;
// Prepare next token substring parameters
find_next_token();
// Return current token
return line.substr(cur_offset, cur_length);
}
void StringTokenizer::find_next_token()
{
have_token = false;
while (!have_token && index < length)
{
token_offset = index;
index = line.find(delimiter, token_offset);
if (index == std::string::npos)
{
index = length;
}
token_length = index - token_offset;
if (token_length >= 1)
{
// Found a non-zero length token
have_token = true;
}
if (index < length)
{
++index;
}
}
}
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