123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/* chardefs.h -- Character definitions for readline. */
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/* Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library, a library for
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reading lines of text with interactive input and history editing.
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The GNU Readline Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 1, or
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(at your option) any later version.
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The GNU Readline Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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The GNU General Public License is often shipped with GNU software, and
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is generally kept in a file called COPYING or LICENSE. If you do not
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have a copy of the license, write to the Free Software Foundation,
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675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _CHARDEFS_H
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#define _CHARDEFS_H
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#include <ctype.h>
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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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#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 control_character_mask 0x1f /* 0x20 - 1 */
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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 CTRL_CHAR(c) ((c) < control_character_threshold)
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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_mask)
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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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/* Old versions
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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 digit_p(c) ((c) >= '0' && (c) <= '9')
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*/
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#define lowercase_p(c) (islower(c))
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#define uppercase_p(c) (isupper(c))
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#define digit_p(x) (isdigit (x))
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#define pure_alphabetic(c) (lowercase_p(c) || uppercase_p(c))
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/* Old versions
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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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*/
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#ifndef to_upper
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# define to_upper(c) (islower(c) ? toupper(c) : (c))
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# define to_lower(c) (isupper(c) ? tolower(c) : (c))
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#endif
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#ifndef digit_value
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#define digit_value(x) ((x) - '0')
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#endif
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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 0x7f
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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 ' ' /* XXX - was 0x20 */
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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_H */
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