external/openurl/include/macros.h

   1 #ifndef _MACROS_H
   2 #define _MACROS_H
   3
   4 /****************************************************************************/
   5
   6 #include "SDI_compiler.h"
   7
   8 #if defined(__amigaos4__)
   9 #define GETINTERFACE(iface, base)       (iface = (APTR)GetInterface((struct Library *)(base), "main", 1L, NULL))
  10 #define DROPINTERFACE(iface)            (DropInterface((struct Interface *)iface), iface = NULL)
  11 #else
  12 #define GETINTERFACE(iface, base)       TRUE
  13 #define DROPINTERFACE(iface)
  14 #endif
  15
  16 // special flagging macros
  17 #define isFlagSet(v,f)      (((v) & (f)) == (f))  // return TRUE if the flag is set
  18 #define hasFlag(v,f)        (((v) & (f)) != 0)    // return TRUE if one of the flags in f is set in v
  19 #define isFlagClear(v,f)    (((v) & (f)) == 0)    // return TRUE if flag f is not set in v
  20 #define SET_FLAG(v,f)       ((v) |= (f))          // set the flag f in v
  21 #define CLEAR_FLAG(v,f)     ((v) &= ~(f))         // clear the flag f in v
  22 #define MASK_FLAG(v,f)      ((v) &= (f))          // mask the variable v with flag f bitwise
  23
  24 // transforms a define into a string
  25 #define STR(x)  STR2(x)
  26 #define STR2(x) #x
  27
  28 #define INITMESSAGE(m,p,l) (((struct Message *)(m))->mn_Node.ln_Type = NT_MESSAGE, \
  29                             ((struct Message *)(m))->mn_ReplyPort = ((struct MsgPort *)(p)), \
  30                             ((struct Message *)(m))->mn_Length = ((UWORD)l))
  31
  32 #define MIN(a,b) ((a<b) ? (a) : (b))
  33 #define MAX(a,b) ((a>b) ? (a) : (b))
  34 #define ABS(a) (((a)>0) ? (a) : -(a))
  35 #define BOOLSAME(a,b) (((a) ? TRUE : FALSE)==((b) ? TRUE : FALSE))
  36
  37 #if !defined(__amigaos4__) && !defined(__AROS__)
  38 #define SYS_Error TAG_IGNORE
  39 #endif
  40
  41 #if defined(__AROS__)
  42 #define MAXRMARG  15 /* maximum arguments */
  43 #endif
  44
  45 // xget()
  46 // Gets an attribute value from a MUI object
  47 //ULONG xget(Object *obj, const IPTR attr);
  48 #if defined(__GNUC__)
  49   // please note that we do not evaluate the return value of GetAttr()
  50   // as some attributes (e.g. MUIA_Selected) always return FALSE, even
  51   // when they are supported by the object. But setting b=0 right before
  52   // the GetAttr() should catch the case when attr doesn't exist at all
  53   #define xget(OBJ, ATTR) ({IPTR b=0; GetAttr(ATTR, OBJ, &b); b;})
  54 #endif
  55
  56 /****************************************************************************/
  57
  58 #endif /* _MACROS_H */