Strategy_SortStrategy.c

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#include <stdlib.h>
#include <string.h>
#include "Strategy_SortStrategy.h"
 
 
static bool _Compare_Name(const EntryInformation* leftEntry, const EntryInformation* rightEntry)
{
    bool swapEntries = false;
 
    if (leftEntry != NULL && rightEntry != NULL)
    {
        int result = strcmp(leftEntry->Name, rightEntry->Name);
        swapEntries = result > 0;
    }
 
    return swapEntries;
}
 
static bool _Compare_Age(const EntryInformation* leftEntry, const EntryInformation* rightEntry)
{
    bool swapEntries = false;
 
    if (leftEntry != NULL && rightEntry != NULL)
    {
        int result = leftEntry->Age - rightEntry->Age;
        swapEntries = result > 0;
    }
 
    return swapEntries;
}
 
static bool _Compare_Height(const EntryInformation* leftEntry, const EntryInformation* rightEntry)
{
    bool swapEntries = false;
 
    if (leftEntry != NULL && rightEntry != NULL)
    {
        int result = leftEntry->Height - rightEntry->Height;
        swapEntries = result > 0;
    }
 
    return swapEntries;
}
 
//=============================================================================
//=============================================================================
 
typedef struct
{
    const char* name;                
    CompareFunction compareFunction; 
} SortStrategyItem;
 
static SortStrategyItem sortingStrategies[] =
{
    { "ByName"  , _Compare_Name   },
    { "ByAge"   , _Compare_Age    },
    { "ByHeight", _Compare_Height }
};
 
//-----------------------------------------------------------------------------
 
void SortStrategy_Initialize(SortStrategy* strategy, SortOptions sortOption, bool reversedSort)
{
    if (strategy != NULL)
    {
        if (sortOption >= 0 && sortOption < (int)sizeof(sortingStrategies) / sizeof(sortingStrategies[0]))
        {
            strategy->name = sortingStrategies[sortOption].name;
            strategy->compareFunction = sortingStrategies[sortOption].compareFunction;
            strategy->reversedSort = reversedSort;
        }
    }
}