Rxstring.hpp

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#ifndef RxString_HPP_INCLUDED
#define RxString_HPP_INCLUDED
 
#include "rexx.h"
#include "ServiceException.hpp"
#include "SysAPIManager.hpp"
 
class Rxstring
{
public:
    size_t strlength;                // length of the string
    char * strptr;                   // the string data
};
 
class ManagedRxstring : public Rxstring
{
public:
    inline ManagedRxstring()
    {
        strlength = 0;
        strptr = NULL;
    }
 
    inline ManagedRxstring(size_t size)
    {
        setStringSize(size);
    }
 
    inline ~ManagedRxstring()
    {
        if (strptr != NULL)
        {
            SysAPIManager::releaseMemory(strptr);
        }
    }
 
    void setStringSize(size_t size)
    {
        strlength = size;
        allocateResult(size);
    }
 
 
    void ensureCapacity(size_t size)
    {
        if (strlength < size || strptr == NULL)
        {
            if (strptr != NULL)
            {
                SysAPIManager::releaseMemory(strptr);
                strptr = NULL;
            }
            setStringSize(size);
        }
    }
 
    char *allocateResult(size_t size)
    {
        strptr = (char *)SysAPIManager::allocateMemory(size);
        if (strptr == NULL)
        {
            throw new ServiceException(MEMORY_ERROR, "Error allocating result data");
        }
        return strptr;
    }
};
 
#endif