diff options
Diffstat (limited to 'Src/nde/win/BinaryField.cpp')
| -rw-r--r-- | Src/nde/win/BinaryField.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/Src/nde/win/BinaryField.cpp b/Src/nde/win/BinaryField.cpp new file mode 100644 index 00000000..0641fdaf --- /dev/null +++ b/Src/nde/win/BinaryField.cpp @@ -0,0 +1,172 @@ +/* --------------------------------------------------------------------------- + Nullsoft Database Engine + -------------------- + codename: Near Death Experience +--------------------------------------------------------------------------- */ + +/* --------------------------------------------------------------------------- + + BinaryField Class +Field data layout: +[2 bytes] length +[length bytes] binary data +--------------------------------------------------------------------------- */ + +#include "../nde.h" +#include "BinaryField.h" +#include "../NDEString.h" +//--------------------------------------------------------------------------- +BinaryField::BinaryField(const uint8_t *_Data, int len) +{ + InitField(); + Type = FIELD_BINARY; + if (_Data && len > 0) + { + Data = (uint8_t *)ndestring_malloc(len); + memcpy(Data, _Data, len); + Size = len; + } +} + +//--------------------------------------------------------------------------- +void BinaryField::InitField(void) +{ + Type = FIELD_BINARY; + Data = NULL; + Size = 0; +} + +//--------------------------------------------------------------------------- +BinaryField::BinaryField() +{ + InitField(); +} + +//--------------------------------------------------------------------------- +BinaryField::~BinaryField() +{ + ndestring_release((wchar_t *)Data); +} + +//--------------------------------------------------------------------------- +void BinaryField::ReadTypedData(const uint8_t *data, size_t len) +{ + unsigned short c; + int pos = 0; + + CHECK_SHORT(len); + + c = GET_SHORT(); pos += 2; + if (c && c<=len) + { + Size = c; + ndestring_release((wchar_t *)Data); + Data = (uint8_t *)ndestring_malloc(c); + GET_BINARY(Data, data, c, pos); + } +} + +//--------------------------------------------------------------------------- +void BinaryField::WriteTypedData(uint8_t *data, size_t len) +{ + size_t pos = 0; + + CHECK_SHORT(len); + + if (Data && Size<=len) + { + unsigned short c = (unsigned short)Size; + PUT_SHORT(c); pos += 2; + if (Data) + PUT_BINARY(data, (unsigned char*)Data, c, pos); + } + else + { + PUT_SHORT(0); + } +} + +//--------------------------------------------------------------------------- +const uint8_t *BinaryField::GetData(size_t *len) +{ + if (len) + *len = Size; + return Data; +} + +//--------------------------------------------------------------------------- +void BinaryField::SetData(const uint8_t *_Data, size_t len) +{ + if (!_Data || !len) return; + ndestring_release((wchar_t *)Data); + Size = 0; + Data = (uint8_t *)ndestring_malloc(len); + memcpy(Data, _Data, len); + Size = len; +} + +//--------------------------------------------------------------------------- +size_t BinaryField::GetDataSize(void) +{ + if (!Data) return 2; + return Size + 2; +} + +//--------------------------------------------------------------------------- +int BinaryField::Compare(Field *Entry) +{ + if (!Entry) return -1; + size_t compare_length; + const uint8_t *compare_data = ((BinaryField*)Entry)->GetData(&compare_length); + return memcmp(Data, compare_data, min(compare_length, Size)); +} + +//--------------------------------------------------------------------------- +bool BinaryField::ApplyFilter(Field *FilterData, int op) +{ + size_t l, s; + const uint8_t *p = ((BinaryField *)FilterData)->GetData(&l); + const uint8_t *d = GetData(&s); + if (!p) + p = (const uint8_t *)""; + if (!d) + d = (const uint8_t *)""; + bool r; + switch (op) + { + case FILTER_EQUALS: + if (l != s) + r = false; + else + r = !memcmp(d, p, min(s, l)); + break; + case FILTER_CONTAINS: + if (l > s) + r = FALSE; + else + r = !!memmem(d, p, s, l); + break; + case FILTER_ABOVE: + r = (memcmp(d, p, min(s, l)) > 0); + break; + case FILTER_BELOW: + r = (memcmp(d, p, min(s, l)) < 0); + break; + case FILTER_BELOWOREQUAL: + r = (memcmp(d, p, min(s, l)) <= 0); + break; + case FILTER_ABOVEOREQUAL: + r = (memcmp(d, p, min(s, l)) >= 0); + break; + case FILTER_ISEMPTY: + r = (s == 0); + break; + case FILTER_ISNOTEMPTY: + r = (s != 0); + break; + default: + r = true; + break; + } + return r; +}
\ No newline at end of file |