145 lines
3.4 KiB
C++
145 lines
3.4 KiB
C++
/* ---------------------------------------------------------------------------
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Nullsoft Database Engine
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--------------------
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codename: Near Death Experience
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--------------------------------------------------------------------------- */
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/* ---------------------------------------------------------------------------
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IndexField Class
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Windows implementation
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Field data layout
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[4 bytes] Position
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[4 bytes] Data Type
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[1 byte] Name Length
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[Name Length bytes] Name (UTF-8)
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--------------------------------------------------------------------------- */
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#include "../nde.h"
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#include "../ndestring.h"
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//---------------------------------------------------------------------------
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IndexField::IndexField(unsigned char id, int Pos, int type, const wchar_t *FieldName)
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{
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InitField();
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Type = FIELD_INDEX;
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Name = ndestring_wcsdup(FieldName);
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ID = id;
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Position = Pos;
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DataType = type;
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}
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//---------------------------------------------------------------------------
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void IndexField::InitField(void)
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{
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index = 0;
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Type = FIELD_INDEX;
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Name = NULL;
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ID = 0;
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Position = -1;
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DataType = FIELD_UNKNOWN;
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}
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//---------------------------------------------------------------------------
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IndexField::IndexField()
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{
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InitField();
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}
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//---------------------------------------------------------------------------
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IndexField::~IndexField()
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{
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ndestring_release(Name);
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delete index;
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}
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//---------------------------------------------------------------------------
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void IndexField::ReadTypedData(const uint8_t *data, size_t len)
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{
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unsigned char c;
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int pos=0;
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CHECK_INT(len);
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Position = GET_INT(); pos += 4;
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CHECK_INT(len);
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DataType = GET_INT(); pos += 4;
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CHECK_CHAR(len);
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c = GET_CHAR(); pos++;
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if (c)
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{
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CHECK_BIN(len, c);
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int string_length = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(data+pos), c, 0, 0);
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Name = ndestring_malloc((string_length+1)*sizeof(wchar_t));
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MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(data+pos), c, Name, string_length);
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Name[string_length]=0;
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}
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}
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//---------------------------------------------------------------------------
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void IndexField::WriteTypedData(uint8_t *data, size_t len)
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{
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int pos=0;
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CHECK_INT(len);
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PUT_INT(Position); pos += 4;
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CHECK_INT(len);
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PUT_INT(DataType); pos += 4;
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CHECK_CHAR(len);
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CHECK_CHAR(len);
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if (Name)
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{
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size_t string_length = WideCharToMultiByte(CP_UTF8, 0, Name, -1, 0, 0, 0, 0);
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if (string_length)
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{
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PUT_CHAR((uint8_t)string_length-1);
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pos++;
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CHECK_BIN(len, string_length-1);
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WideCharToMultiByte(CP_UTF8, 0, Name, -1, (LPSTR)(data+pos), (int)string_length-1, 0, 0);
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}
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else
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{
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PUT_CHAR(0);
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}
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}
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else
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{
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PUT_CHAR(0);
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}
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}
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//---------------------------------------------------------------------------
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wchar_t *IndexField::GetIndexName(void)
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{
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return Name;
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}
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//---------------------------------------------------------------------------
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size_t IndexField::GetDataSize(void)
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{
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size_t s=9;
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if (Name)
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{
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int string_length=WideCharToMultiByte(CP_UTF8, 0, Name, -1, 0, 0, 0, 0);
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if (string_length)
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s+=string_length-1;
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}
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s++;
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return s;
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}
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//---------------------------------------------------------------------------
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int IndexField::Compare(Field * /*Entry*/)
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{
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return 0;
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}
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//---------------------------------------------------------------------------
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int IndexField::TranslateToIndex(int Id, IndexField *toindex)
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{
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if (index && toindex && toindex->index)
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return index->TranslateIndex(Id, toindex->index);
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return -1;
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} |