1d8810aa91
- isacii - islower - isupper - toascii - isspace - isdigit - tolower - toupper - strtol - atoi
107 lines
1.9 KiB
C
107 lines
1.9 KiB
C
/****************************************************************************************
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*
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* Author: Stefan Lankes
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* Chair for Operating Systems, RWTH Aachen University
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* Date: 24/03/2011
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*
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****************************************************************************************
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*
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* Written by the Chair for Operating Systems, RWTH Aachen University
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*
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* NO Copyright (C) 2010, Stefan Lankes,
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* consider these trivial functions to be public domain.
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*
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* These functions are distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*/
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#ifndef __CTYPE_H_
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#define __CYTPE_H_
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static inline int isascii(int c)
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{
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return (((unsigned char)(c))<=0x7f);
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}
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static inline int toascii(c)
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{
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return (((unsigned char)(c))&0x7f);
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}
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static inline int isspace(int c)
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{
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if (!isascii(c))
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return 0;
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if (' ' == (unsigned char) c)
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return 1;
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if ('\n' == (unsigned char) c)
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return 1;
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if ('\r' == (unsigned char) c)
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return 1;
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if ('\t' == (unsigned char) c)
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return 1;
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if ('\v' == (unsigned char) c)
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return 1;
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if ('\f' == (unsigned char) c)
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return 1;
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return 0;
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}
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static inline int isdigit(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= '0') && ((unsigned char) c <= '9'))
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return 1;
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return 0;
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}
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static inline int islower(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= 'a') && ((unsigned char) c <= 'z'))
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return 1;
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return 0;
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}
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static inline int isupper(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= 'A') && ((unsigned char) c <= 'Z'))
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return 1;
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return 0;
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}
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static inline int isalpha(int c)
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{
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if (isupper(c) || islower(c))
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return 1;
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return 0;
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}
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static inline unsigned char tolower(unsigned char c)
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{
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if (isupper(c))
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c -= 'A'-'a';
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return c;
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}
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static inline unsigned char toupper(unsigned char c)
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{
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if (islower(c))
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c -= 'a'-'A';
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return c;
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}
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#endif
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