kern

view src/klibc/ctype.c @ 73:b4b7198986a6

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fixed a potential null dereference when deleting a bug in the redblack tree
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 15 Oct 2011 08:06:10 +0300
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1 #include "ctype.h"
2
3 int isalnum(int c)
4 {
5 return isalpha(c) || isdigit(c);
6 }
7
8 int isalpha(int c)
9 {
10 return isupper(c) || islower(c);
11 }
12
13 int isblank(int c)
14 {
15 return c == ' ' || c == '\t';
16 }
17
18 int isdigit(int c)
19 {
20 return c >= '0' && c <= '9';
21 }
22
23 int isupper(int c)
24 {
25 return c >= 'A' && c <= 'Z';
26 }
27
28 int islower(int c)
29 {
30 return c >= 'a' && c <= 'z';
31 }
32
33 int isgraph(int c)
34 {
35 return c > ' ' && c <= '~';
36 }
37
38 int isprint(int c)
39 {
40 return isgraph(c) || c == ' ';
41 }
42
43 int isspace(int c)
44 {
45 return isblank(c) || c == '\f' || c == '\n' || c == '\r' || c == '\v';
46 }
47
48 int toupper(int c)
49 {
50 return islower(c) ? (c + ('A' - 'a')) : c;
51 }
52
53 int tolower(int c)
54 {
55 return isupper(c) ? (c + ('A' - 'a')) : c;
56 }