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 | |
57 | int IsAlpha (char C) |
58 | /* Check for a letter */ |
59 | { |
60 | return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z'); |
61 | } |
62 | |
63 | |
64 | |
65 | int 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 | |
73 | int IsAscii (char C) |
74 | /* Check for an ASCII character */ |
75 | { |
76 | return (C & ~0x7F) == 0; |
77 | } |
78 | |
79 | |
80 | |
81 | int IsBlank (char C) |
82 | /* Check for a space or tab */ |
83 | { |
84 | return (C == ' ' || C == '\t'); |
85 | } |
86 | |
87 | |
88 | |
89 | int 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 | |
97 | int IsDigit (char C) |
98 | /* Check for a digit */ |
99 | { |
100 | return (C >= '0' && C <= '9'); |
101 | } |
102 | |
103 | |
104 | |
105 | int IsLower (char C) |
106 | /* Check for a lower case char */ |
107 | { |
108 | return (C >= 'a' && C <= 'z'); |
109 | } |
110 | |
111 | |
112 | |
113 | int IsUpper (char C) |
114 | /* Check for upper case characters */ |
115 | { |
116 | return (C >= 'A' && C <= 'Z'); |
117 | } |
118 | |
119 | |
120 | |
121 | int IsBDigit (char C) |
122 | /* Check for binary digits (0/1) */ |
123 | { |
124 | return (C == '0' || C == '1'); |
125 | } |
126 | |
127 | |
128 | |
129 | int IsODigit (char C) |
130 | /* Check for octal digits (0..7) */ |
131 | { |
132 | return (C >= '0' && C <= '7'); |
133 | } |
134 | |
135 | |
136 | |
137 | int 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 | |
145 | int IsQuote (char C) |
146 | /* Check for a single or double quote */ |
147 | { |
148 | return (C == '"' || C == '\''); |
149 | } |
150 | |