112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/* chardefs.h -- Character definitions for readline. */
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#ifndef _CHARDEFS_
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#define _CHARDEFS_
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#include <ctype.h>
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#if 0
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/* Getting the correct definition of HAVE_STRING_H is harder than just
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declaring them ourselves. CYGNUS LOCAL. */
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#if defined (HAVE_STRING_H)
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# include <string.h>
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#else
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# include <strings.h>
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#endif /* HAVE_STRING_H */
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#else /* not 0 */
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/* We don't worry about declaring functions where we don't use the return
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value (e.g. strcpy) or which return int. */
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extern char *strrchr ();
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#endif /* not 0 */
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#ifndef savestring
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#if 0
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/* CYGNUS LOCAL--this declaration loses if xmalloc has already been
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declared as void *xmalloc (), as in GDB. The whole concept of
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readline using xmalloc rather than just returning NULL when it runs
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out of memory is questionable, but if we do want xmalloc we need a
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better way to declare it (e.g. the client declares it, or the client
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calls a rl_register_xmalloc function analagous to the way signal()
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works. */
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extern char *xmalloc ();
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#endif
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# ifndef strcpy
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extern char *strcpy ();
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# endif
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#define savestring(x) strcpy (xmalloc (1 + strlen (x)), (x))
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#endif
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#ifndef whitespace
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#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
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#endif
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#ifdef CTRL
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#undef CTRL
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#endif
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/* Some character stuff. */
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#define control_character_threshold 0x020 /* Smaller than this is control. */
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#define meta_character_threshold 0x07f /* Larger than this is Meta. */
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#define control_character_bit 0x40 /* 0x000000, must be off. */
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#define meta_character_bit 0x080 /* x0000000, must be on. */
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#define largest_char 255 /* Largest character value. */
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#define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
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#define CTRL(c) ((c) & (~control_character_bit))
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#define META(c) ((c) | meta_character_bit)
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#define UNMETA(c) ((c) & (~meta_character_bit))
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#define UNCTRL(c) to_upper(((c)|control_character_bit))
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#define lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
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#define uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
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#define pure_alphabetic(c) (lowercase_p(c) || uppercase_p(c))
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#ifndef to_upper
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#define to_upper(c) (lowercase_p(c) ? ((c) - 32) : (c))
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#define to_lower(c) (uppercase_p(c) ? ((c) + 32) : (c))
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#endif
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#define CTRL_P(c) ((c) < control_character_threshold)
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#define META_P(c) ((c) > meta_character_threshold)
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#ifndef NEWLINE
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#define NEWLINE '\n'
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#endif
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#ifndef RETURN
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#define RETURN CTRL('M')
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#endif
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#ifndef RUBOUT
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#define RUBOUT 0x07f
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#endif
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#ifndef TAB
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#define TAB '\t'
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#endif
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#ifdef ABORT_CHAR
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#undef ABORT_CHAR
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#endif
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#define ABORT_CHAR CTRL('G')
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#ifdef PAGE
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#undef PAGE
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#endif
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#define PAGE CTRL('L')
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#ifdef SPACE
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#undef SPACE
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#endif
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#define SPACE 0x020
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#ifdef ESC
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#undef ESC
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#endif
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#define ESC CTRL('[')
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#endif /* _CHARDEFS_ */
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