From c080e504e4d74027b985b1ed675c172c083cea76 Mon Sep 17 00:00:00 2001
From: Ben Longbons <b.r.longbons@gmail.com>
Date: Thu, 27 Dec 2012 21:23:46 -0800
Subject: Use cxxstdio

---
 src/common/extract.hpp | 208 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 208 insertions(+)
 create mode 100644 src/common/extract.hpp

(limited to 'src/common/extract.hpp')

diff --git a/src/common/extract.hpp b/src/common/extract.hpp
new file mode 100644
index 0000000..52df9df
--- /dev/null
+++ b/src/common/extract.hpp
@@ -0,0 +1,208 @@
+#ifndef EXTRACT_HPP
+#define EXTRACT_HPP
+//    extract.hpp - a simple, heirarchail, tokenizer
+//
+//    Copyright © 2012 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 <algorithm>
+
+#include "const_array.hpp"
+#include "mmo.hpp"
+
+template<class T, typename=typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, char>::value>::type>
+bool extract(const_string str, T *iv)
+{
+    if (!str || str.size() > 20)
+        return false;
+    switch (str.front())
+    {
+        case '-':
+        case '0' ... '9':
+            break;
+        default:
+            return false;
+    }
+    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
+    {
+        if (str.front() == '-')
+            return false;
+        unsigned long long v = strtoull(buf, &end, 10);
+        if (errno || *end)
+            return false;
+        *iv = v;
+        return *iv == v;
+    }
+}
+
+// extra typename=void to workaround some duplicate overload rule
+template<class T, typename=typename std::enable_if<std::is_enum<T>::value>::type, typename=void>
+bool extract(const_string 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 ...
+    *iv = static_cast<T>(v);
+    return true;
+}
+
+inline
+bool extract(const_string str, const_string *rv)
+{
+    *rv = str;
+    return true;
+}
+
+inline
+bool extract(const_string str, std::string *rv)
+{
+    *rv = std::string(str.begin(), str.end());
+    return true;
+}
+
+template<size_t N>
+__attribute__((deprecated))
+bool extract(const_string str, char (*out)[N])
+{
+    if (str.size() >= N)
+        return false;
+    std::copy(str.begin(), str.end(), *out);
+    std::fill(*out + str.size() , *out + N, '\0');
+    return true;
+}
+
+// basically just a std::tuple
+// but it provides its data members publically
+template<char split, class... T>
+class Record;
+template<char split>
+class Record<split>
+{
+};
+template<char split, class F, class... R>
+class Record<split, F, R...>
+{
+public:
+    F frist;
+    Record<split, R...> rest;
+public:
+    Record(F f, R... r)
+    : frist(f), rest(r...)
+    {}
+};
+template<char split, class... T>
+Record<split, T...> record(T... t)
+{
+    return Record<split, T...>(t...);
+}
+
+template<char split>
+bool extract(const_string str, Record<split>)
+{
+    return !str;
+}
+template<char split, class F, class... R>
+bool extract(const_string str, Record<split, F, R...> rec)
+{
+    const char *s = std::find(str.begin(), str.end(), split);
+    if (s == str.end())
+        return sizeof...(R) == 0 && extract(str, rec.frist);
+    return extract(const_string(str.begin(), s), rec.frist)
+        && extract(const_string(s + 1, str.end()), 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(const_string str, VRecord<split, T> rec)
+{
+    if (str.empty())
+        return true;
+    const char *s = std::find(str.begin(), str.end(), split);
+    rec.arr->emplace_back();
+    if (s == str.end())
+        return extract(str, &rec.arr->back());
+    return extract(const_string(str.begin(), s), &rec.arr->back())
+        && extract(const_string(s + 1, str.end()), rec);
+}
+
+inline
+bool extract(const_string str, struct global_reg *var)
+{
+    return extract(str,
+            record<','>(&var->str, &var->value));
+}
+
+inline
+bool extract(const_string str, struct item *it)
+{
+    return extract(str,
+            record<','>(
+                &it->id,
+                &it->nameid,
+                &it->amount,
+                &it->equip,
+                &it->identify,
+                &it->refine,
+                &it->attribute,
+                &it->card[0],
+                &it->card[1],
+                &it->card[2],
+                &it->card[3],
+                &it->broken))
+        || extract(str,
+            record<','>(
+                &it->id,
+                &it->nameid,
+                &it->amount,
+                &it->equip,
+                &it->identify,
+                &it->refine,
+                &it->attribute,
+                &it->card[0],
+                &it->card[1],
+                &it->card[2],
+                &it->card[3]));
+}
+#endif // EXTRACT_HPP
-- 
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