89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*************************************************************************************
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*
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* DEVELOPMENT NOTES:
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*
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* 1. See nsStringImpl.h
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*
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* 2. I've used the uncommon template style of including a base type.
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* The purpose is to allow callers to vary the underlying size of
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* the buffer as a local optimization. It may turn out to be a
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* bad idea, but for now I'm more focused on getting a workable
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* autostring. Please be patient.
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*
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* FILE NOTES:
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*
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* 02.29.2000: Original files (rickg)
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* 03.02.2000: Flesh out the interface to be compatible with old library (rickg)
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*
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*************************************************************************************/
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#ifndef NS_AUTOSTRING_
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#define NS_AUTOSTRING_
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#include "nsStringImpl.h"
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/********************************************************************
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*
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* This template provides the basic implementation for nsAutoString,
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* nsAutoCString and so on. Note the typedefs at the bottom of this file.
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*
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********************************************************************/
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template <class CharType, int DefaultBufferSize=32>
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class nsAutoStringImpl : public nsStringImpl<CharType> {
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public:
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//default constructor
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nsAutoStringImpl() : nsStringImpl<CharType> () {
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memset(mInternalBuffer,0,sizeof(mInternalBuffer));
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mStringValue.mCapacity=DefaultBufferSize;
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mStringValue.mBuffer=mInternalBuffer;
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}
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//copy constructor
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nsAutoStringImpl(const nsAutoStringImpl& aCopy,PRInt32 aLength=-1) : nsStringImpl<CharType>() {
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memset(mInternalBuffer,0,sizeof(mInternalBuffer));
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mStringValue.mCapacity=DefaultBufferSize;
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mStringValue.mBuffer=mInternalBuffer;
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Assign(aCopy);
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}
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//call this version for all ABT versions of readable strings
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nsAutoStringImpl(const nsReadableString &aCopy,PRInt32 aLength=-1) : nsStringImpl<CharType> () {
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memset(mInternalBuffer,0,sizeof(mInternalBuffer));
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mStringValue.mCapacity=DefaultBufferSize;
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mStringValue.mBuffer=mInternalBuffer;
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Assign(aCopy);
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}
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//call this version for ptrs to char-strings that match the internal char type
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nsAutoStringImpl(const CharType* theString, PRInt32 aLength=-1) : nsStringImpl<CharType> () {
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memset(mInternalBuffer,0,sizeof(mInternalBuffer));
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mStringValue.mCapacity=DefaultBufferSize;
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mStringValue.mBuffer=mInternalBuffer;
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Assign(theString,aLength);
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}
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virtual ~nsAutoStringImpl() { }
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nsAutoStringImpl& operator=(const nsAutoStringImpl& aCopy) {
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if(aCopy.mStringValue.mBuffer!=mStringValue.mBuffer) {
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Assign(aCopy);
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}
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return *this;
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}
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nsAutoStringImpl& operator=(const CharType* aString) {
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if(aCopy.mStringValue.mBuffer!=aString) {
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Assign(aCopy);
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}
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return *this;
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}
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protected:
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CharType mInternalBuffer[DefaultBufferSize];
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};
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#endif
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