ctype3
Character classification functions
Usage
#include <ctype.h>
int
digittoint(int c);
int
isalnum(int c);
int
isalpha(int c);
int
isascii(int c);
int
iscntrl(int c);
int
isdigit(int c);
int
isgraph(int c);
int
ishexnumber(int c);
int
isideogram(int c);
int
islower(int c);
int
isnumber(int c);
int
isphonogram(int c);
int
isspecial(int c);
int
isprint(int c);
int
ispunct(int c);
int
isrune(int c);
int
isspace(int c);
int
isupper(int c);
int
isxdigit(int c);
int
toascii(int c);
int
tolower(int c);
int
toupper(int c);
Library
Standard C Library (libc, -lc)
Overview
The above functions perform character tests and conversions on the integer c. They are available as macros, defined in the include file ⟨ctype.h⟩, or as true functions in the C library. See the specific manual pages for more information.
Releases
87 releases since FreeBSD 2.0.5-RELEASE; the text changed 45 times.