1/*****************************************************************************/
2/* */
3/* chartype.c */
4/* */
5/* Character classification functions */
6/* */
7/* */
8/* */
9/* (C) 2000-2004 Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#include "chartype.h"
37
38
39
40/* This module contains replacements for functions in ctype.h besides other
41** functions. There is a problem with using ctype.h directly:
42** The parameter must have a value of "unsigned char" or EOF.
43** So on platforms where a char is signed, this may give problems or at
44** least warnings. The wrapper functions below will have an "char" parameter
45** but handle it correctly. They will NOT work for EOF, but this is not a
46** problem, since EOF is always handled separately.
47*/
48
49
50
51/*****************************************************************************/
52/* Code */
53/*****************************************************************************/
54
55
56
57int IsAlpha (char C)
58/* Check for a letter */
59{
60 return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z');
61}
62
63
64
65int IsAlNum (char C)
66/* Check for letter or digit */
67{
68 return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') || (C >= '0' && C <= '9');
69}
70
71
72
73int IsAscii (char C)
74/* Check for an ASCII character */
75{
76 return (C & ~0x7F) == 0;
77}
78
79
80
81int IsBlank (char C)
82/* Check for a space or tab */
83{
84 return (C == ' ' || C == '\t');
85}
86
87
88
89int IsSpace (char C)
90/* Check for any white space characters */
91{
92 return (C == ' ' || C == '\n' || C == '\r' || C == '\t' || C == '\v' || C == '\f');
93}
94
95
96
97int IsDigit (char C)
98/* Check for a digit */
99{
100 return (C >= '0' && C <= '9');
101}
102
103
104
105int IsLower (char C)
106/* Check for a lower case char */
107{
108 return (C >= 'a' && C <= 'z');
109}
110
111
112
113int IsUpper (char C)
114/* Check for upper case characters */
115{
116 return (C >= 'A' && C <= 'Z');
117}
118
119
120
121int IsBDigit (char C)
122/* Check for binary digits (0/1) */
123{
124 return (C == '0' || C == '1');
125}
126
127
128
129int IsODigit (char C)
130/* Check for octal digits (0..7) */
131{
132 return (C >= '0' && C <= '7');
133}
134
135
136
137int IsXDigit (char C)
138/* Check for hexadecimal digits */
139{
140 return (C >= 'a' && C <= 'f') || (C >= 'A' && C <= 'F') || (C >= '0' && C <= '9');
141}
142
143
144
145int IsQuote (char C)
146/* Check for a single or double quote */
147{
148 return (C == '"' || C == '\'');
149}
150