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Annotated edit history of tolower(3) version 1, including all changes. View license author blame.
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1 perry 1 TOUPPER
2 !!!TOUPPER
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 CONFORMING TO
8 BUGS
9 SEE ALSO
10 ----
11 !!NAME
12
13
14 toupper, tolower - convert letter to upper or lower case
15 !!SYNOPSIS
16
17
18 __#include
19 __ ''c''__);
20 int tolower (int__ ''c''__);
21 __
22 !!DESCRIPTION
23
24
25 __toupper()__ converts the letter ''c'' to upper case,
26 if possible.
27
28
29 __tolower()__ converts the letter ''c'' to lower case,
30 if possible.
31
32
33 If ''c'' is not an unsigned char value, or EOF, the
34 behaviour of these functions is undefined.
35 !!RETURN VALUE
36
37
38 The value returned is that of the converted letter, or
39 ''c'' if the conversion was not possible.
40 !!CONFORMING TO
41
42
43 ANSI C, BSD 4.3
44 !!BUGS
45
46
47 The details of what constitutes an uppercase or lowercase
48 letter depend on the current locale. For example, the
49 default ____ locale does not know about
50 umlauts, so no conversion is done for them.
51
52
53 In some non - English locales, there are lowercase letters
54 with no corresponding uppercase equivalent; the German sharp
55 s is one example.
56 !!SEE ALSO
57
58
59 isalpha(3), setlocale(3),
60 locale(7)
61 ----
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