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145 lines
4.4 KiB
C
145 lines
4.4 KiB
C
/*****************************************************************************/
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/* */
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/* chartype.c */
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/* */
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/* Character classification functions */
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/* */
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/* */
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/* */
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/* (C) 2000 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include "chartype.h"
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/* This module contains replacements for functions in ctype.h besides other
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* functions. There is a problem with using ctype.h directly:
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* The parameter must have a value of "unsigned char" or EOF.
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* So on platforms where a char is signed, this may give problems or at
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* least warnings. The wrapper functions below will have an "char" parameter
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* but handle it correctly. They will NOT work for EOF, but this is not a
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* problem, since EOF is always handled separately.
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*/
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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int IsAlpha (char C)
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/* Check for a letter */
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{
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return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z');
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}
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int IsAlNum (char C)
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/* Check for letter or digit */
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{
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return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') || (C >= '0' && C <= '9');
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}
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int IsAscii (char C)
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/* Check for an ASCII character */
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{
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return (C & ~0x7F) == 0;
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}
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int IsBlank (char C)
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/* Check for a space or tab */
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{
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return (C == ' ' || C == '\t');
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}
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int IsSpace (char C)
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/* Check for any white space characters */
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{
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return (C == ' ' || C == '\n' || C == '\r' || C == '\t' || C == '\v' || C == '\f');
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}
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int IsDigit (char C)
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/* Check for a digit */
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{
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return (C >= '0' && C <= '9');
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}
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int IsLower (char C)
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/* Check for a lower case char */
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{
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return (C >= 'a' && C <= 'z');
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}
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int IsUpper (char C)
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/* Check for upper case characters */
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{
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return (C >= 'A' && C <= 'Z');
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}
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int IsBDigit (char C)
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/* Check for binary digits (0/1) */
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{
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return (C == '0' || C == '1');
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}
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int IsXDigit (char C)
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/* Check for hexadecimal digits */
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{
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return (C >= 'a' && C <= 'f') || (C >= 'A' && C <= 'F') || (C >= '0' && C <= '9');
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}
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int IsQuote (char C)
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/* Check for a single or double quote */
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{
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return (C == '"' || C == '\'');
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}
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