diff options
Diffstat (limited to 'storage/connect/value.h')
| -rw-r--r-- | storage/connect/value.h | 66 |
1 files changed, 46 insertions, 20 deletions
diff --git a/storage/connect/value.h b/storage/connect/value.h index c5a381e89da..a670ade4c28 100644 --- a/storage/connect/value.h +++ b/storage/connect/value.h @@ -1,7 +1,7 @@ /**************** Value H Declares Source Code File (.H) ***************/ -/* Name: VALUE.H Version 2.1 */ +/* Name: VALUE.H Version 2.2 */ /* */ -/* (C) Copyright to the author Olivier BERTRAND 2001-2014 */ +/* (C) Copyright to the author Olivier BERTRAND 2001-2016 */ /* */ /* This file contains the VALUE and derived classes declares. */ /***********************************************************************/ @@ -17,6 +17,13 @@ #include "block.h" /***********************************************************************/ +/* This should list the processors accepting unaligned numeral values.*/ +/***********************************************************************/ +#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || defined(_M_IA64) +#define UNALIGNED_OK +#endif + +/***********************************************************************/ /* Types used in some class definitions. */ /***********************************************************************/ enum CONV {CNV_ANY = 0, /* Convert to any type */ @@ -116,27 +123,46 @@ class DllExport VALUE : public BLOCK { virtual bool Compute(PGLOBAL g, PVAL *vp, int np, OPVAL op); virtual bool FormatValue(PVAL vp, char *fmt) = 0; - /** - Set value from a non-aligned in-memory value in the machine byte order. - TYPE can be either of: - - int, short, longlong - - uint, ushort, ulonglong - - float, double - @param - a pointer to a non-aligned value of type TYPE. - */ - template<typename TYPE> - void SetValueNonAligned(const char *p) - { -#if defined(__i386__) || defined(__x86_64__) - SetValue(*((TYPE*) p)); // x86 can cast non-aligned memory directly + /** + Set value from a non-aligned in-memory value in the machine byte order. + TYPE can be either of: + - int, short, longlong + - uint, ushort, ulonglong + - float, double + @param - a pointer to a non-aligned value of type TYPE. + */ + template<typename TYPE> + void SetValueNonAligned(const char *p) + { +#if defined(UNALIGNED_OK) + SetValue(*((TYPE*)p)); // x86 can cast non-aligned memory directly #else - TYPE tmp; // a slower version for non-x86 platforms - memcpy(&tmp, p, sizeof(tmp)); - SetValue(tmp); + TYPE tmp; // a slower version for non-x86 platforms + memcpy(&tmp, p, sizeof(tmp)); + SetValue(tmp); #endif - } + } // end of SetValueNonAligned + + /** + Get value from a non-aligned in-memory value in the machine byte order. + TYPE can be either of: + - int, short, longlong + - uint, ushort, ulonglong + - float, double + @params - a pointer to a non-aligned value of type TYPE, the TYPE value. + */ + template<typename TYPE> + void GetValueNonAligned(char *p, TYPE n) + { +#if defined(UNALIGNED_OK) + *(TYPE *)p = n; // x86 can cast non-aligned memory directly +#else + TYPE tmp = n; // a slower version for non-x86 platforms + memcpy(p, &tmp, sizeof(tmp)); +#endif + } // end of SetValueNonAligned - protected: +protected: virtual bool SetConstFormat(PGLOBAL, FORMAT&) = 0; const char *GetXfmt(void); |