mirror of
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160 lines
4.1 KiB
C++
160 lines
4.1 KiB
C++
/*
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* ResourceSet.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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typedef si32 TResource;
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typedef si64 TResourceCap; //to avoid overflow when adding integers. Signed values are easier to control.
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class JsonNode;
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namespace Res
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{
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class ResourceSet;
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bool canAfford(const ResourceSet &res, const ResourceSet &price); //can a be used to pay price b
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enum ERes
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{
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WOOD = 0, MERCURY, ORE, SULFUR, CRYSTAL, GEMS, GOLD, MITHRIL,
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WOOD_AND_ORE = 127 // special case for town bonus resource
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};
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//class to be representing a vector of resource
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class ResourceSet : public std::vector<int>
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{
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public:
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DLL_LINKAGE ResourceSet();
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// read resources set from json. Format example: { "gold": 500, "wood":5 }
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DLL_LINKAGE ResourceSet(const JsonNode & node);
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#define scalarOperator(OPSIGN) \
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ResourceSet operator OPSIGN(const TResource &rhs) const \
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{ \
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ResourceSet ret = *this; \
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for(int i = 0; i < (int)size(); i++) \
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ret[i] = at(i) OPSIGN rhs; \
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\
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return ret; \
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}
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#define vectorOperator(OPSIGN) \
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ResourceSet operator OPSIGN(const ResourceSet &rhs) const \
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{ \
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ResourceSet ret = *this; \
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for(int i = 0; i < (int)size(); i++) \
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ret[i] = at(i) OPSIGN rhs[i]; \
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\
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return ret; \
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}
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#define opEqOperator(OPSIGN, RHS_TYPE) \
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ResourceSet& operator OPSIGN ## =(const RHS_TYPE &rhs) \
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{ \
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return *this = *this OPSIGN rhs; \
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}
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scalarOperator(+)
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scalarOperator(-)
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scalarOperator(*)
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scalarOperator(/)
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opEqOperator(+, TResource)
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opEqOperator(-, TResource)
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opEqOperator(*, TResource)
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vectorOperator(+)
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vectorOperator(-)
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opEqOperator(+, ResourceSet)
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opEqOperator(-, ResourceSet)
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#undef scalarOperator
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#undef vectorOperator
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#undef opEqOperator
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//to be used for calculations of type "how many units of sth can I afford?"
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int operator/(const ResourceSet &rhs)
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{
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int ret = INT_MAX;
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for(int i = 0; i < (int)size(); i++)
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if(rhs[i])
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vstd::amin(ret, at(i) / rhs[i]);
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return ret;
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}
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ResourceSet & operator=(const TResource &rhs)
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{
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for(int i = 0; i < (int)size(); i++)
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at(i) = rhs;
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return *this;
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}
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ResourceSet operator-() const
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{
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ResourceSet ret;
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for(int i = 0; i < (int)size(); i++)
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ret[i] = -at(i);
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return ret;
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}
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// WARNING: comparison operators are used for "can afford" relation: a <= b means that foreach i a[i] <= b[i]
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// that doesn't work the other way: a > b doesn't mean that a cannot be afforded with b, it's still b can afford a
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// bool operator<(const ResourceSet &rhs)
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// {
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// for(int i = 0; i < size(); i++)
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// if(at(i) >= rhs[i])
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// return false;
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//
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// return true;
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// }
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template <typename Handler> void serialize(Handler &h, const int version)
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{
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h & static_cast<std::vector<int>&>(*this);
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}
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DLL_LINKAGE void amax(const TResourceCap &val); //performs vstd::amax on each element
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DLL_LINKAGE void positive(); //values below 0 are set to 0 - upgrade cost can't be negative, for example
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DLL_LINKAGE bool nonZero() const; //returns true if at least one value is non-zero;
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DLL_LINKAGE bool canAfford(const ResourceSet &price) const;
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DLL_LINKAGE bool canBeAfforded(const ResourceSet &res) const;
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//special iterator of iterating over non-zero resources in set
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class DLL_LINKAGE nziterator
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{
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struct ResEntry
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{
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Res::ERes resType;
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TResourceCap resVal;
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} cur;
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const ResourceSet &rs;
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void advance();
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public:
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nziterator(const ResourceSet &RS);
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bool valid();
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nziterator operator++();
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nziterator operator++(int);
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const ResEntry& operator*() const;
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const ResEntry* operator->() const;
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};
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};
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using ::operator<<;
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}
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typedef Res::ResourceSet TResources;
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