dlls/oleaut32/variant.h

   1 /*
   2  * Variant Inlines
   3  *
   4  * Copyright 2003 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "windef.h"
  22 #include "winerror.h"
  23 #include "objbase.h"
  24 #include "oleauto.h"
  25 #include <math.h>
  26
  27 /* Get just the type from a variant pointer */
  28 #define V_TYPE(v)  (V_VT((v)) & VT_TYPEMASK)
  29
  30 /* Flags set in V_VT, other than the actual type value */
  31 #define VT_EXTRA_TYPE (VT_VECTOR|VT_ARRAY|VT_BYREF|VT_RESERVED)
  32
  33 /* Get the extra flags from a variant pointer */
  34 #define V_EXTRA_TYPE(v) (V_VT((v)) & VT_EXTRA_TYPE)
  35
  36 /* Missing in Windows but useful VTBIT_* defines */
  37 #define VTBIT_BOOL      (1 << VT_BSTR)
  38 #define VTBIT_BSTR      (1 << VT_BSTR)
  39 #define VTBIT_DATE      (1 << VT_DATE)
  40 #define VTBIT_DISPATCH  (1 << VT_DISPATCH)
  41 #define VTBIT_EMPTY     (1 << VT_EMPTY)
  42 #define VTBIT_ERROR     (1 << VT_ERROR)
  43 #define VTBIT_INT       (1 << VT_INT)
  44 #define VTBIT_NULL      (1 << VT_NULL)
  45 #define VTBIT_UINT      (1 << VT_UINT)
  46 #define VTBIT_UNKNOWN   (1 << VT_UNKNOWN)
  47 #define VTBIT_VARIANT   (1 << VT_VARIANT)
  48 #define VTBIT_15        (1 << 15)        /* no variant type with this number */
  49
  50 /* Size constraints */
  51 #define I1_MAX   0x7f
  52 #define I1_MIN   ((-I1_MAX)-1)
  53 #define UI1_MAX  0xff
  54 #define UI1_MIN  0
  55 #define I2_MAX   0x7fff
  56 #define I2_MIN   ((-I2_MAX)-1)
  57 #define UI2_MAX  0xffff
  58 #define UI2_MIN  0
  59 #define I4_MAX   0x7fffffff
  60 #define I4_MIN   ((-I4_MAX)-1)
  61 #define UI4_MAX  0xffffffff
  62 #define UI4_MIN  0
  63 #define I8_MAX   (((LONGLONG)I4_MAX << 32) | UI4_MAX)
  64 #define I8_MIN   ((-I8_MAX)-1)
  65 #define UI8_MAX  (((ULONGLONG)UI4_MAX << 32) | UI4_MAX)
  66 #define UI8_MIN  0
  67 #define DATE_MAX 2958465
  68 #define DATE_MIN -657434
  69 #define R4_MAX 3.402823567797336e38
  70 #define R4_MIN 1.40129846432481707e-45
  71 #define R8_MAX 1.79769313486231470e+308
  72 #define R8_MIN 4.94065645841246544e-324
  73
  74 /* Value of sign for a positive decimal number */
  75 #define DECIMAL_POS 0
  76
  77 /* Native headers don't change the union ordering for DECIMAL sign/scale (duh).
  78  * This means that the signscale member is only useful for setting both members to 0.
  79  * SIGNSCALE creates endian-correct values so that we can properly set both at once
  80  * to values other than 0.
  81  */
  82 #ifdef WORDS_BIGENDIAN
  83 #define SIGNSCALE(sign,scale) (((scale) << 8) | sign)
  84 #else
  85 #define SIGNSCALE(sign,scale) (((sign) << 8) | scale)
  86 #endif
  87
  88 /* Macros for getting at a DECIMAL's parts */
  89 #define DEC_SIGN(d)      ((d)->u.s.sign)
  90 #define DEC_SCALE(d)     ((d)->u.s.scale)
  91 #define DEC_SIGNSCALE(d) ((d)->u.signscale)
  92 #define DEC_HI32(d)      ((d)->Hi32)
  93 #define DEC_MID32(d)     ((d)->u1.s1.Mid32)
  94 #define DEC_LO32(d)      ((d)->u1.s1.Lo32)
  95 #define DEC_LO64(d)      ((d)->u1.Lo64)
  96
  97 #define DEC_MAX_SCALE    28 /* Maximum scale for a decimal */
  98
  99 /* Internal flags for low level conversion functions */
 100 #define  VAR_BOOLONOFF 0x0400 /* Convert bool to "On"/"Off" */
 101 #define  VAR_BOOLYESNO 0x0800 /* Convert bool to "Yes"/"No" */
 102 #define  VAR_NEGATIVE  0x1000 /* Number is negative */
 103
 104 /* The localised characters that make up a valid number */
 105 typedef struct tagVARIANT_NUMBER_CHARS
 106 {
 107   WCHAR cNegativeSymbol;
 108   WCHAR cPositiveSymbol;
 109   WCHAR cDecimalPoint;
 110   WCHAR cDigitSeparator;
 111   WCHAR cCurrencyLocal;
 112   WCHAR cCurrencyLocal2;
 113   WCHAR cCurrencyDecimalPoint;
 114   WCHAR cCurrencyDigitSeparator;
 115 } VARIANT_NUMBER_CHARS;
 116
 117 unsigned int get_type_size(ULONG*, VARTYPE) DECLSPEC_HIDDEN;
 118 HRESULT VARIANT_ClearInd(VARIANTARG *) DECLSPEC_HIDDEN;
 119 BOOL get_date_format(LCID, DWORD, const SYSTEMTIME *,
 120         const WCHAR *, WCHAR *, int) DECLSPEC_HIDDEN;