435fe50ea6
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@51 42af7a65-404d-4744-a932-0658087f49c3
168 lines
5.2 KiB
C
168 lines
5.2 KiB
C
/************************************************************
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* ctype.h
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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#ifndef __CTYPE_H
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#define __CTYPE_H
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/* There is no consistent ctype implementation, just a
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* smattering of functions. Individually, they are okay, but
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* a more standard, data lookup approach would make more sense
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* if used extensively.
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*/
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/************************************************************
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* Included Files
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************************************************************/
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#include <sys/types.h>
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/************************************************************
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* Definitions
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************************************************************/
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/************************************************************
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* Function: isspace
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*
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* Description:
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* Checks for white-space characters. In the "C" and "POSIX"
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* locales, these are: space, form-feed ('\f'), newline ('\n'),
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* carriage return ('\r'), horizontal tab ('\t'), and vertical
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* tab ('\v').
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*
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************************************************************/
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#define isspace(c) \
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((c) == ' ' || (c) == '\t' || (c) == '\n' || \
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(c) == '\r' || (c) == '\f' || c== '\v')
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/************************************************************
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* Function: isascii
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*
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* Description:
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* Checks whether c is a 7-bit unsigned char value that
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* fits into the ASCII character set.
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*
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************************************************************/
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#define isascii(c) ((c) >= 0 && (c) <= 0x7f);
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/************************************************************
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* Function: isprint
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*
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* Description:
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* Checks for a printable character (including space)
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*
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************************************************************/
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#define isprint(c) ((c) >= 0x20 && (c) < 0x7f)
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/************************************************************
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* Function: iscntrl
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*
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* Description:
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* Checks for control character.
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*
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************************************************************/
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#define iscontrol(c) (!isprint(c))
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/************************************************************
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* Function: isdigit
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*
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* Description:
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* ANSI standard isdigit implementation.
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*
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************************************************************/
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#define isdigit(c) ((c) >= '0' && (c) <= '9')
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/************************************************************
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* Function: isxdigit
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*
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* Description:
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* isxdigit() checks for a hexadecimal digits, i.e. one of
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* {0-9,a-f,A-F}
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*
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************************************************************/
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#define isxdigit(c) \
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(((c) >= '0' && (c) <= '9') || \
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((c) >= 'a' && (c) <= 'f') || \
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((c) >= 'A' && (c) <= 'F'))
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/************************************************************
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* Function: toupper
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*
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* Description:
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* toupper() converts the letter c to upper case, if possible.
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*
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************************************************************/
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#define toupper(c) \
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(((c) >= 'a' && (c) <= 'z') ? ((c) - 'a' + 'A') : (c))
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/************************************************************
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* Function: tolower
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*
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* Description:
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* tolower() converts the letter c to lower case, if possible.
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*
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************************************************************/
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#define tolower(c) \
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(((c) >= 'A' && (c) <= 'Z') ? ((c) - 'A' + 'a') : (c))
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/************************************************************
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* Public Type Definitions
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************************************************************/
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/************************************************************
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* Public Functions
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************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CTYPE_H */
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