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61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
// Copyright (C) 2022 TiltedPhoques SRL.
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// For licensing information see LICENSE at the root of this distribution.
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#include <console/StringTokenizer.h>
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namespace Console
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{
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StringTokenizer::StringTokenizer(TiltedPhoques::String acInput, const char* acpDelim)
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: m_string(std::move(acInput))
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, m_count(-1)
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, m_begin(0)
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, m_end(0)
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{
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if (!acpDelim)
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m_delim = " \f\n\r\t\v"; // default to whitespace
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else
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m_delim = acpDelim;
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// Point to the first token
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m_begin = m_string.find_first_not_of(m_delim);
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m_end = m_string.find_first_of(m_delim, m_begin);
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}
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size_t StringTokenizer::CountTokens() noexcept
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{
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if (m_count >= 0) // return if we've already counted
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return (m_count);
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TiltedPhoques::String::size_type n = 0;
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TiltedPhoques::String::size_type i = 0;
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for (;;)
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{
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// advance to the first token
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if ((i = m_string.find_first_not_of(m_delim, i)) == TiltedPhoques::String::npos)
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break;
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// advance to the next delimiter
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i = m_string.find_first_of(m_delim, i + 1);
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n++;
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if (i == TiltedPhoques::String::npos)
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break;
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}
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return (m_count = n);
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}
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void StringTokenizer::GetNext(TiltedPhoques::String& s)
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{
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if (m_begin != TiltedPhoques::String::npos && m_end != TiltedPhoques::String::npos)
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{
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s = m_string.substr(m_begin, m_end - m_begin);
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m_begin = m_string.find_first_not_of(m_delim, m_end);
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m_end = m_string.find_first_of(m_delim, m_begin);
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}
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else if (m_begin != TiltedPhoques::String::npos && m_end == TiltedPhoques::String::npos)
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{
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s = m_string.substr(m_begin, m_string.length() - m_begin);
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m_begin = m_string.find_first_not_of(m_delim, m_end);
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}
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}
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} // namespace Console
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