2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
155 lines
4.2 KiB
Groff
155 lines
4.2 KiB
Groff
.\" $NetBSD: ctype.3,v 1.21 2010/05/06 11:46:11 jruoho Exp $
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.\"
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.\" Copyright (c) 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)ctype.3 6.5 (Berkeley) 4/19/91
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.\"
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.Dd May 6, 2010
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.Dt CTYPE 3
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.Os
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.Sh NAME
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.Nm isalpha ,
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.Nm isupper ,
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.Nm islower ,
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.Nm isdigit ,
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.Nm isxdigit ,
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.Nm isalnum ,
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.Nm isspace ,
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.Nm ispunct ,
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.Nm isprint ,
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.Nm isgraph ,
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.Nm iscntrl ,
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.Nm isblank ,
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.Nm toupper ,
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.Nm tolower ,
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.Nd character classification and mapping functions
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In ctype.h
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.Fn isalpha "int c"
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.Fn isupper "int c"
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.Fn islower "int c"
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.Fn isdigit "int c"
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.Fn isxdigit "int c"
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.Fn isalnum "int c"
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.Fn isspace "int c"
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.Fn ispunct "int c"
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.Fn isprint "int c"
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.Fn isgraph "int c"
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.Fn iscntrl "int c"
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.Fn isblank "int c"
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.Fn toupper "int c"
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.Fn tolower "int c"
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.Sh DESCRIPTION
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The above functions perform character tests and conversions on the integer
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.Ar c .
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.Pp
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See the specific manual pages for information about the
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test or conversion performed by each function.
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.Sh EXAMPLES
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To print an upper-case version of a string to stdout,
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the following code can be used:
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.Bd -literal -offset indent
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const char *s = "xyz";
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while (*s != '\e0') {
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putchar(toupper((int)(unsigned char)*s));
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s++;
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}
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.Ed
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.Sh SEE ALSO
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.Xr isalnum 3 ,
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.Xr isalpha 3 ,
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.Xr isblank 3 ,
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.Xr iscntrl 3 ,
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.Xr isdigit 3 ,
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.Xr isgraph 3 ,
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.Xr islower 3 ,
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.Xr isprint 3 ,
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.Xr ispunct 3 ,
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.Xr isspace 3 ,
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.Xr isupper 3 ,
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.Xr isxdigit 3 ,
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.Xr tolower 3 ,
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.Xr toupper 3 ,
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.Xr ascii 7
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.Sh STANDARDS
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These functions, with the exception of
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.Fn isblank ,
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conform to
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.St -ansiC .
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All described functions, including
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.Fn isblank ,
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also conform to
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.St -p1003.1-2001 .
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.Sh CAVEATS
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The first argument of these functions is of type
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.Vt int ,
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but only a very restricted subset of values are actually valid.
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The argument must either be the value of the macro
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.Dv EOF
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(which has a negative value),
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or must be a non-negative value within the range representable as
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.Vt unsigned char .
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Passing invalid values leads to undefined behavior.
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.Pp
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Values of type
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.Vt int
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that were returned by
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.Xr getc 3 ,
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.Xr fgetc 3 ,
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and similar functions or macros
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are already in the correct range, and may be safely passed to these
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.Nm ctype
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functions without any casts.
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.Pp
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Values of type
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.Vt char
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or
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.Vt signed char
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must first be cast to
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.Vt unsigned char ,
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to ensure that the values are within the correct range.
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The result should then be cast to
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.Vt int
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to avoid warnings from some compilers.
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Casting a negative-valued
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.Vt char
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or
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.Vt signed char
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directly to
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.Vt int
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will produce a negative-valued
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.Vt int ,
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which will be outside the range of allowed values
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(unless it happens to be equal to
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.Dv EOF ,
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but even that would not give the desired result).
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