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authorBen Longbons <b.r.longbons@gmail.com>2014-10-25 15:24:26 -0700
committerBen Longbons <b.r.longbons@gmail.com>2014-10-26 14:21:48 -0700
commit86395f53634b3ef1ce76a7f1e5edfdb61f8ffd80 (patch)
tree2710c62fe71d5e0d2e228fba9c951a040c4dcddf /src/io/extract.hpp
parent6800761863dd45b6055768febc6ace6a20120dc7 (diff)
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Fix header ranking
Diffstat (limited to 'src/io/extract.hpp')
-rw-r--r--src/io/extract.hpp232
1 files changed, 232 insertions, 0 deletions
diff --git a/src/io/extract.hpp b/src/io/extract.hpp
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+++ b/src/io/extract.hpp
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+#pragma once
+// extract.hpp - a simple, hierarchical, tokenizer
+//
+// Copyright © 2012-2013 Ben Longbons <b.r.longbons@gmail.com>
+//
+// This file is part of The Mana World (Athena server)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+#include "fwd.hpp"
+
+#include <cerrno>
+#include <cstdlib>
+
+#include <algorithm>
+#include <chrono>
+#include <vector>
+
+#include "../ints/wrap.hpp"
+
+#include "../strings/xstring.hpp"
+
+#include "../compat/time_t.hpp"
+
+#include "../generic/enum.hpp"
+
+
+namespace tmwa
+{
+template<class T>
+bool do_extract(XString str, T t);
+
+template<class T, typename=typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, char>::value && !std::is_same<T, bool>::value>::type>
+bool extract(XString str, T *iv)
+{
+ if (!str || str.size() > 20)
+ return false;
+ if (!((str.front() == '-' && std::is_signed<T>::value)
+ || ('0' <= str.front() && str.front() <= '9')))
+ return false;
+ // needs a NUL, but can't always be given one. TODO VString?
+ char buf[20 + 1];
+ std::copy(str.begin(), str.end(), buf);
+ buf[str.size()] = '\0';
+
+ char *end;
+ errno = 0;
+ if (std::is_signed<T>::value)
+ {
+ long long v = strtoll(buf, &end, 10);
+ if (errno || *end)
+ return false;
+ *iv = v;
+ return *iv == v;
+ }
+ else
+ {
+ unsigned long long v = strtoull(buf, &end, 10);
+ if (errno || *end)
+ return false;
+ *iv = v;
+ return *iv == v;
+ }
+}
+
+inline
+bool extract(XString str, TimeT *tv)
+{
+ return extract(str, &tv->value);
+}
+
+template<class T, typename=typename std::enable_if<std::is_enum<T>::value>::type>
+bool extract_as_int(XString str, T *iv)
+{
+ typedef typename underlying_type<T>::type U;
+ U v;
+ // defer to integer version
+ if (!extract(str, &v))
+ return false;
+ // TODO check bounds using enum min/max as in SSCANF
+ *iv = static_cast<T>(v);
+ return true;
+}
+
+bool extract(XString str, XString *rv);
+bool extract(XString str, RString *rv);
+bool extract(XString str, AString *rv);
+
+template<uint8_t N>
+bool extract(XString str, VString<N> *out)
+{
+ if (str.size() > N)
+ return false;
+ *out = str;
+ return true;
+}
+
+inline
+bool extract(XString str, LString exact)
+{
+ return str == exact;
+}
+
+template<class T>
+class LStripper
+{
+public:
+ T impl;
+};
+
+template<class T>
+LStripper<T> lstripping(T v)
+{
+ return {v};
+}
+
+template<class T>
+bool extract(XString str, LStripper<T> out)
+{
+ return extract(str.lstrip(), out.impl);
+}
+
+// basically just a std::tuple
+// but it provides its data members publically
+template<char split, int n, class... T>
+class Record;
+template<char split, int n>
+class Record<split, n>
+{
+};
+template<char split, int n, class F, class... R>
+class Record<split, n, F, R...>
+{
+public:
+ F frist;
+ Record<split, n - 1, R...> rest;
+public:
+ Record(F f, R... r)
+ : frist(f), rest(r...)
+ {}
+};
+template<char split, class... T>
+Record<split, sizeof...(T), T...> record(T... t)
+{
+ return Record<split, sizeof...(T), T...>(t...);
+}
+template<char split, int n, class... T>
+Record<split, n, T...> record(T... t)
+{
+ static_assert(0 < n && n < sizeof...(T), "don't be silly");
+ return Record<split, n, T...>(t...);
+}
+
+template<char split, int n>
+bool extract(XString str, Record<split, n>)
+{
+ return !str;
+}
+
+template<char split, int n, class F, class... R>
+bool extract(XString str, Record<split, n, F, R...> rec)
+{
+ XString::iterator s = std::find(str.begin(), str.end(), split);
+ XString::iterator s2 = s;
+ if (s2 != str.end())
+ ++s2;
+ XString head = str.xislice_h(s);
+ XString tail = str.xislice_t(s2);
+ if (s == str.end())
+ return (extract(head, rec.frist) && n <= 1)
+ || (!head && n <= 0);
+
+ return (extract(head, rec.frist) || n <= 0)
+ && extract(tail, rec.rest);
+}
+
+template<char split, class T>
+struct VRecord
+{
+ std::vector<T> *arr;
+};
+
+template<char split, class T>
+VRecord<split, T> vrec(std::vector<T> *arr)
+{
+ return {arr};
+}
+
+template<char split, class T>
+bool extract(XString str, VRecord<split, T> rec)
+{
+ if (!str)
+ return true;
+ XString::iterator s = std::find(str.begin(), str.end(), split);
+ rec.arr->emplace_back();
+ if (s == str.end())
+ return extract(str, &rec.arr->back());
+ return extract(str.xislice_h(s), &rec.arr->back())
+ && extract(str.xislice_t(s + 1), rec);
+}
+
+template<class T>
+bool do_extract(XString str, T t)
+{
+ return extract(str, t);
+}
+
+template<class R>
+bool extract(XString str, Wrapped<R> *w)
+{
+ return extract(str, &w->_value);
+}
+
+bool extract(XString str, std::chrono::nanoseconds *ns);
+bool extract(XString str, std::chrono::microseconds *us);
+bool extract(XString str, std::chrono::milliseconds *ms);
+bool extract(XString str, std::chrono::seconds *s);
+bool extract(XString str, std::chrono::minutes *min);
+bool extract(XString str, std::chrono::hours *h);
+bool extract(XString str, std::chrono::duration<int, std::ratio<60*60*24>> *d);
+} // namespace tmwa