2 * Character classification and conversion */
7 #ifdef USE_CTYPE_C_FUNCTIONS
8 /* function prototpes */
9 extern int isalnum(int c);
10 extern int isalpha(int c);
11 extern int isascii(int c);
12 extern int iscntrl(int c);
13 extern int isdigit(int c);
14 extern int isgraph(int c);
15 extern int islower(int c);
16 extern int isprint(int c);
17 extern int ispunct(int c);
18 extern int isspace(int c);
19 extern int isupper(int c);
20 extern int isxdigit(int c);
21 extern int isxlower(int c);
22 extern int isxupper(int c);
23 extern int toascii(int c);
24 extern int tolower(int c);
25 extern int toupper(int c);
29 /* macro definitions */
30 #define isalnum(c) (isalpha(c) || isdigit(c))
31 #define isalpha(c) (isupper(c) || islower(c))
32 #define isascii(c) (c > 0 && c <= 0x7f)
33 #define iscntrl(c) ((c > 0) && ((c <= 0x1F) || (c == 0x7f)))
34 #define isdigit(c) (c >= '0' && c <= '9')
35 #define isgraph(c) (c != ' ' && isprint(c))
36 #define islower(c) (c >= 'a' && c <= 'z')
37 #define isprint(c) (c >= ' ' && c <= '~')
38 #define ispunct(c) ((c > ' ' && c <= '~') && !isalnum(c))
39 #define isspace(c) (c == ' ' || c == '\f' || c == '\n' || c == '\r' ||\
40 c == '\t' || c == '\v')
41 #define isupper(c) (c >= 'A' && c <= 'Z')
42 #define isxdigit(c) (isxupper(c) || isxlower(c))
43 #define isxlower(c) (isdigit(c) || (c >= 'a' && c <= 'f'))
44 #define isxupper(c) (isdigit(c) || (c >= 'A' && c <= 'F'))
45 #define toascii(c) (c & 0x7f)
46 #define tolower(c) (isupper(c) ? ( c - 'A' + 'a') : (c))
47 #define toupper(c) (islower(c) ? (c - 'a' + 'A') : (c))
51 #endif /* __CTYPE_H */