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Length: 1628 (0x65c)
Types: TextFile
Notes: UNIX file
Names: »ctype.3«
└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
└─⟦28c352965⟧ »/a« UNIX Filesystem
└─⟦this⟧ »usr/man/man3/ctype.3«
.ig @(#)ctype.3 2.1 7/1/84 @(#)Copyright (C) 1983 by National Semiconductor Corp. .. .ds 8 \d\s-28\s0\u .TH CTYPE 3 .SH NAME isalpha, isupper, islower, isdigit, isxdigit, isalnum, isspace, ispunct, isprint, isgraph, iscntrl, isascii \- classify characters .SH SYNOPSIS .B #include <ctype.h> .PP .B isalpha(c) .PP .B . . . .SH DESCRIPTION These macros classify character-coded integer values by table lookup. Each is a predicate returning nonzero for true, zero for false. .I Isascii is defined on all integer values; the rest are defined only where .I isascii is true and on the single non-\s-1ASCII\s0 value .SM .B EOF (\-1 \- see .IR stdio (3S)). .TP 15n .I isalpha .I c is a letter. .TP .I isupper .I c is an upper case letter. .TP .I islower .I c is a lower case letter. .TP .I isdigit .I c is a digit [0-9]. .TP .I isxdigit .I c is a hexadecimal digit [0-9], [A-F] or [a-f]. .TP .I isalnum .I c is an alphanumeric character (letter or digit). .TP .I isspace .I c is a space, tab, carriage return, newline, vertical tab, or formfeed. .TP .I ispunct .I c is a punctuation character (neither control nor alphanumeric). .TP .I isprint .I c is a printing character, code 040\*8 (space) through 0176\*8 (tilde). .TP .I isgraph .I c is a printing character, like .I isprint except false for space. .TP .I iscntrl .I c is a delete character (0177\*8) or ordinary control character (less than 040\*8). .TP .I isascii .I c is an \s-1ASCII\s0 character, code less than 0200\*8. .SH DIAGNOSTICS If the argument to any of these macros is not in the domain of the function, the result is undefined. .SH "SEE ALSO" conv(3), ascii(7)