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Character classification routines |
These functions perform character classification. They return true or false status depending whether the character passed to the function falls into the function's classification (i.e. isdigit() returns true if its argument is any value '0' though '9', inclusive.)
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int | isalnum (int __c) __ATTR_CONST__ |
int | isalpha (int __c) __ATTR_CONST__ |
int | isascii (int __c) __ATTR_CONST__ |
int | isblank (int __c) __ATTR_CONST__ |
int | iscntrl (int __c) __ATTR_CONST__ |
int | isdigit (int __c) __ATTR_CONST__ |
int | isgraph (int __c) __ATTR_CONST__ |
int | islower (int __c) __ATTR_CONST__ |
int | isprint (int __c) __ATTR_CONST__ |
int | ispunct (int __c) __ATTR_CONST__ |
int | isspace (int __c) __ATTR_CONST__ |
int | isupper (int __c) __ATTR_CONST__ |
int | isxdigit (int __c) __ATTR_CONST__ |
Character convertion routines |
If c is not an unsigned char value, or EOF , the behaviour of these functions is undefined.
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int | toascii (int __c) __ATTR_CONST__ |
int | tolower (int __c) __ATTR_CONST__ |
int | toupper (int __c) __ATTR_CONST__ |
Defines |
#define | __CTYPE_H_ 1 |
#define | __ATTR_CONST__ __attribute__((__const__)) |