97 lines
2.0 KiB
C++
97 lines
2.0 KiB
C++
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DWORD
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FASTCALL
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CalculateHashNoCase(
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IN LPCSTR lpszString,
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IN DWORD dwStringLength
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);
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//
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// HEADER_STRING - extension of ICSTRING so we can perform hashing on strings.
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// Note that we only care about the header value
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//
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class HEADER_STRING : public ICSTRING {
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private:
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DWORD m_Hash;
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public:
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HEADER_STRING() {
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SetHash(0);
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}
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~HEADER_STRING() {
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}
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VOID SetHash(DWORD dwHash) {
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m_Hash = dwHash;
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}
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VOID SetNextKnownIndex(BYTE bNextKnown) {
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_Union.Bytes.ExtraByte1 = bNextKnown;
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}
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BYTE * GetNextKnownIndexPtr() {
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return &_Union.Bytes.ExtraByte1;
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}
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DWORD GetNextKnownIndex() {
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return ((DWORD)_Union.Bytes.ExtraByte1);
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}
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DWORD GetHash(VOID) {
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return m_Hash;
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}
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VOID CreateHash(LPSTR lpszBase)
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{
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DWORD i = 0;
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LPSTR string = StringAddress(lpszBase);
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while ((i < (DWORD)StringLength())
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&& !((string[i] == ':')
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|| (string[i] == ' ')
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|| (string[i] == '\r')
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|| (string[i] == '\n'))) {
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++i;
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}
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m_Hash = CalculateHashNoCase(string, i);
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}
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int HashStrnicmp(LPSTR lpBase, LPCSTR lpszString, DWORD dwLength, DWORD dwHash)
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{
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int RetVal = -1;
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if ((m_Hash == 0) || (m_Hash == dwHash))
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{
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if ( Strnicmp(lpBase, lpszString, dwLength) == 0 )
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{
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LPSTR value;
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value = StringAddress(lpBase) + dwLength;
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//
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// the input string could be a substring of a different header
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//
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if (*value == ':')
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{
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RetVal = 0; // success, we have a match here!
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}
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}
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}
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return RetVal;
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}
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HEADER_STRING & operator=(LPSTR String) {
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SetHash(0);
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return (HEADER_STRING &)ICSTRING::operator=(String);
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}
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};
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