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Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
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.Dd $Mdocdate: September 5 2017 $ .Dt ISPUNCT 3 .Os .Sh NAME .Nm ispunct , .Nm ispunct_l .Nd punctuation single-byte character test .Sh SYNOPSIS n ctype.h .Ft int .Fn ispunct "int c" .Ft int .Fn ispunct_l "int c" "locale_t locale" .Sh DESCRIPTION The .Fn ispunct and .Fn ispunct_l test for any punctuation characters.
p In the C locale, the complete list of punctuation characters is:
p .Dl !\(dq#$%&\(aq()*+,-./:;<=>?@[\e]\(ha_\(ga{|}\(ti
p These are all characters for which .Xr isgraph 3 is true but .Xr isalnum 3 is not. .Ox always uses the C locale for these functions, ignoring the global locale, the thread-specific locale, and the .Fa locale argument. .Sh RETURN VALUES These functions return zero if the character tests false or non-zero if the character tests true. .Sh ENVIRONMENT On systems supporting non-ASCII single-byte character encodings, results of these functions may differ, and the results of .Fn ispunct may depend on the .Ev LC_CTYPE .Xr locale 1 . .Sh SEE ALSO .Xr isalnum 3 , .Xr isalpha 3 , .Xr isascii 3 , .Xr isblank 3 , .Xr iscntrl 3 , .Xr isdigit 3 , .Xr isgraph 3 , .Xr islower 3 , .Xr isprint 3 , .Xr isspace 3 , .Xr isupper 3 , .Xr iswpunct 3 , .Xr isxdigit 3 , .Xr stdio 3 , .Xr toascii 3 , .Xr tolower 3 , .Xr toupper 3 , .Xr ascii 7 .Sh STANDARDS The .Fn ispunct function conforms to .St -ansiC , and .Fn ispunct_l to .St -p1003.1-2008 . .Sh HISTORY The .Fn ispunct function first appeared in .At v7 , and .Fn ispunct_l has been available since .Ox 6.2 . .Sh CAVEATS The argument .Fa c must be .Dv EOF or representable as an .Vt unsigned char ; otherwise, the result is undefined.