1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* Character handling <ctype.h>
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#ifndef _PDCLIB_CTYPE_H
#define _PDCLIB_CTYPE_H _PDCLIB_CTYPE_H
#include "pdclib/_PDCLIB_int.h"
/* Character classification functions */
/* Note that there is a difference between "whitespace" (any printing, non-
graph character, like horizontal and vertical tab), and "blank" (the literal
' ' space character).
There will be masking macros for each of these later on, but right now I
focus on the functions only.
*/
/* Returns isalpha( c ) || isdigit( c ) */
int isalnum( int c );
/* Returns isupper( c ) || islower( c ) in the "C" locale.
In any other locale, also returns true for a locale-specific set of
alphabetic characters which are neither control characters, digits,
punctation, or whitespace.
*/
int isalpha( int c );
/* Returns true if the character isspace() and used for seperating words within
a line of text. In the "C" locale, only ' ' and '\t' are considered blanks.
*/
int isblank( int c );
/* Returns true if the character is a control character. */
int iscntrl( int c );
/* Returns true if the character is a decimal digit. Locale-independent. */
int isdigit( int c );
/* Returns true for every printing character except space (' ').
NOTE: This definition differs from that of iswgraph() in <wctype.h>,
which considers any iswspace() character, not only ' '.
*/
int isgraph( int c );
/* Returns true for lowercase letters in the "C" locale.
In any other locale, also returns true for a locale-specific set of
characters which are neither control characters, digits, punctation, or
space (' '). In a locale other than the "C" locale, a character might test
true for both islower() and isupper().
*/
int islower( int c );
/* Returns true for every printing character including space (' '). */
int isprint( int c );
/* Returns true for a locale-specific set of punctuation charcters; these
may not be whitespace or alphanumeric. In the "C" locale, returns true
for every printing character that is not whitespace or alphanumeric.
*/
int ispunct( int c );
/* Returns true for every standard whitespace character (' ', '\f', '\n', '\r',
'\t', '\v') in the "C" locale. In any other locale, also returns true for a
locale-specific set of characters for which isalnum() is false.
*/
int isspace( int c );
/* Returns true for uppercase letters in the "C" locale.
In any other locale, also returns true for a locale-specific set of
characters which are neither control characters, digits, punctation, or
space (' '). In a locale other than the "C" locale, a character might test
true for both islower() and isupper().
*/
int isupper( int c );
/* Returns true for any hexadecimal-digit character. Locale-independent. */
int isxdigit( int c );
/* Character case mapping functions */
/* Converts an uppercase letter to a corresponding lowercase letter. Input that
is not an uppercase letter remains unchanged.
*/
int tolower( int c );
/* Converts a lowercase letter to a corresponding uppercase letter. Input that
is not a lowercase letter remains unchanged.
*/
int toupper( int c );
#endif
|
