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1173 cejka 1
/*
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 * Copyright (c) 2006 Josef Cejka
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 * All rights reserved.
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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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 * - 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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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup libc
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 * @{
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 */
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/** @file
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 */
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#ifndef LIBC_CTYPE_H_
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#define LIBC_CTYPE_H_
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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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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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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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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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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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static inline int isspace(int c)
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{
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    switch (c) {
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    case ' ':
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    case '\n':
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    case '\t':
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    case '\f':
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    case '\r':
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    case '\v':
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        return 1;
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        break;
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    default:
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        return 0;
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    }
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}
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static inline int tolower(int c)
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{
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    if (isupper(c))
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        return (c + ('a' - 'A' > 0 ? 'a' - 'A' : 'A' - 'a'));
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    else
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        return c;
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}
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#endif
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/** @}
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 */