69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
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/******************************************************************************
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_ _
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| | ___ | |__ ___
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| |/ _ \| '_ \ / _ \
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| | (_) | |_) | (_) |
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|_|\___/|_.__/ \___/
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Copyright:
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Danny Robson, 2020
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*****************************************************************************/
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#include "stringcache.hpp"
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#include "cast.hpp"
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using cruft::stringcache;
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///////////////////////////////////////////////////////////////////////////////
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stringcache::id_t
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stringcache::add (std::string_view val)
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{
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auto const required_size = std::ssize (val);
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if (m_values.size () > std::numeric_limits<value_type>::max ())
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throw std::bad_alloc ();
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if (m_store.size () + required_size > std::numeric_limits<value_type>::max ())
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throw std::bad_alloc ();
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slot_t allocation {
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.start = value_type (m_store.size ()),
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.length = value_type (required_size),
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};
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m_store.resize (m_store.size () + allocation.length);
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std::copy (
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std::begin (val),
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std::end (val),
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std::begin (m_store) + allocation.start
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);
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m_values.push_back (allocation);
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return id_t (m_values.size () - 1);
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}
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//-----------------------------------------------------------------------------
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stringcache::id_t
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stringcache::add (std::string const &val)
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{
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return add (std::string_view (val));
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}
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//-----------------------------------------------------------------------------
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stringcache::id_t
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stringcache::add (char const *val)
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{
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return add (std::string_view (val));
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}
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///////////////////////////////////////////////////////////////////////////////
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std::string_view
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stringcache::operator[] (id_t idx)
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{
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slot_t const entry = m_values[value_type (idx)];
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return std::string_view (m_store.data () + entry.start, entry.length);
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}
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