c8784faf3c
all the characters placed before the space on the ASCII table and the 0x7F character (DEL) are control characters. Signed-off-by: chao.an <anchao@xiaomi.com>
331 lines
8.4 KiB
C
331 lines
8.4 KiB
C
/****************************************************************************
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* include/ctype.h
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*
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* Copyright (C) 2007-2009, 2011, 2014, 2016 Gregory Nutt.
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* All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 NuttX 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 __INCLUDE_CTYPE_H
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#define __INCLUDE_CTYPE_H
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/* There is no consistent ctype implementation, just a smattering of
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* functions. Individually, they are okay, but a more standard, data lookup
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* approach would make more sense 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 <nuttx/compiler.h>
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/****************************************************************************
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* Inline 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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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: isspace
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*
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* Description:
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* Checks for white-space characters. In the "C" and "POSIX" locales,
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* these are: space, form-feed ('\f'), newline ('\n'), carriage return
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* ('\r'), horizontal tab ('\t'), and vertical tab ('\v').
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isspace(int c)
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{
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return c == ' ' || c == '\t' || c == '\n' || c == '\r' ||
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c == '\f' || c == '\v';
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}
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#else
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int isspace(int c);
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#endif
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/****************************************************************************
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* Name: 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 fits into the
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* ASCII character set.
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isascii(int c)
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{
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return c >= 0 && c <= 0x7f;
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}
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#else
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int isascii(int c);
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#endif
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/****************************************************************************
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* Name: 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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#ifdef __cplusplus
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static inline int isprint(int c)
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{
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return c >= 0x20 && c < 0x7f;
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}
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#else
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int isprint(int c);
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#endif
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/****************************************************************************
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* Name: isgraph
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*
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* Description:
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* Checks for a printable character (excluding space)
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isgraph(int c)
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{
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return c > 0x20 && c < 0x7f;
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}
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#else
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int isgraph(int c);
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#endif
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/****************************************************************************
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* Name: 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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#ifdef __cplusplus
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static inline int iscntrl(int c)
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{
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return c < 0x20 || c == 0x7f;
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}
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#else
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int iscntrl(int c);
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#endif
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/****************************************************************************
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* Name: islower
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*
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* Description:
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* Checks for an lowercase letter.
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int islower(int c)
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{
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return c >= 'a' && c <= 'z';
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}
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#else
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int islower(int c);
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#endif
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/****************************************************************************
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* Name: isupper
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*
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* Description:
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* Checks for an uppercase letter.
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isupper(int c)
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{
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return c >= 'A' && c <= 'Z';
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}
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#else
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int isupper(int c);
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#endif
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/****************************************************************************
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* Name: isalpha
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*
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* Description:
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* Checks for an alphabetic character
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isalpha(int c)
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{
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return islower(c) || isupper(c);
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}
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#else
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int isalpha(int c);
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#endif
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/****************************************************************************
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* Name: isblank
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*
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* Description:
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* Checks for blank characters (space or tab). C++11
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isblank(int c)
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{
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return c == ' ' || c == '\t';
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}
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#else
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int isblank(int c);
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#endif
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/****************************************************************************
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* Name: 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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#ifdef __cplusplus
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static inline int isdigit(int c)
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{
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return c >= '0' && c <= '9';
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}
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#else
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int isdigit(int c);
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#endif
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/****************************************************************************
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* Name: isalnum
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*
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* Description:
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* Checks for an alphanumeric character
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isalnum(int c)
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{
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return isalpha(c) || isdigit(c);
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}
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#else
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int isalnum(int c);
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#endif
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/****************************************************************************
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* Name: ispunct
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*
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* Description:
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* Checks for a printable character which is not a space or an
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* alphanumeric character
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int ispunct(int c)
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{
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return isgraph(c) && !isalnum(c);
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}
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#else
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int ispunct(int c);
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#endif
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/****************************************************************************
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* Name: isxdigit
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*
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* Description:
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* isxdigit() checks for a hexadecimal digits, i.e. one of {0-9,a-f,A-F}
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*
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****************************************************************************/
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#ifdef __cplusplus
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static inline int isxdigit(int c)
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{
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return (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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#else
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int isxdigit(int c);
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#endif
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/****************************************************************************
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* Name: 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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#ifdef __cplusplus
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static inline int toupper(int c)
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{
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return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c;
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}
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#else
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int toupper(int c);
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#endif
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/****************************************************************************
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* Name: 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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#ifdef __cplusplus
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static inline int tolower(int c)
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{
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return (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
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}
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#else
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int tolower(int c);
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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 /* __INCLUDE_CTYPE_H */
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