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- /* general.h -- defines that everybody likes to use. */
-
- #ifndef _GENERAL_
- #define _GENERAL_
-
- #ifndef NULL
- #define NULL 0x0
- #endif
-
- #ifndef savestring
- #define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
- #endif
-
- #ifndef whitespace
- #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
- #endif
-
- #ifndef digit
- #define digit(c) ((c) >= '0' && (c) <= '9')
- #endif
-
- #ifndef isletter
- #define isletter(c) (((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <= 'z'))
- #endif
-
- #ifndef digit_value
- #define digit_value(c) ((c) - '0')
- #endif
-
- #ifndef member
- char *index ();
- #define member(c, s) (int)((c) ? index ((s), (c)) : 0)
- #endif
-
- /* Function pointers can be declared as (Function *)foo. */
- #ifndef __FUNCTION_DEF
- typedef int Function ();
- #define __FUNCTION_DEF
- #endif
-
- /* The output of `signal' is different on different systems. Yechh. */
- #if defined(SunOS4) || defined (NeXT) || defined (Ultrix)
- #define sighandler void
- #else
- #define sighandler int
- #endif
-
- typedef sighandler SigHandler ();
-
- #endif /* _GENERAL_ */
-