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Automatically generate the error list.

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This commit is contained in:
christos 2010-12-12 20:08:27 +00:00
parent a7e78491e5
commit 91083d6e86
1 changed files with 92 additions and 0 deletions
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lib/libc/gen/errlist.awk Normal file
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#! /usr/bin/awk -f
# $NetBSD: errlist.awk,v 1.1 2010/12/12 20:08:27 christos Exp $
#
# Copyright (c) 2010 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Christos Zoulas.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
function tabs(desc) {
l = length(desc) + 3; /* 3 = ["",] */
if (l < 16)
return "\t\t\t\t";
else if (l < 24)
return "\t\t\t";
else if (l < 32)
return "\t\t";
else if (l < 40)
return "\t";
else
return "";
}
function perror(name, number, desc)
{
printf("\t\"%s\",%s/* %d - %s */\n", desc, tabs(desc), number, name);
}
BEGIN {
printf("/* Automatically generated file; do not edit */\n");
printf("#include <sys/cdefs.h>\n");
printf("#if defined(LIBC_SCCS) && !defined(lint)\n");
printf("#if 0\n");
printf("static char sccsid[] = \"@(#)errlst.c 8.2 (Berkeley) 11/16/93\";\n");
printf("#else\n");
printf("__RCSID(\"$NetBSD: errlist.awk,v 1.1 2010/12/12 20:08:27 christos Exp $\");\n");
printf("#endif\n");
printf("#endif /* LIBC_SCCS and not lint */\n\n");
printf("#include <errno.h>\n");
printf("static const char *const errlist[] = {\n");
perror("ENOERROR", 0, "Undefined error: 0");
errno = 1;
}
/^#define/ {
name = $2;
if (name == "ELAST")
next;
number = $3;
if (number < 0 || number == "EAGAIN")
next;
desc = $0;
i1 = index(desc, "/*") + 3;
l = length(desc);
desc = substr(desc, i1, l - i1 - 2);
if (number != errno) {
printf("error number mismatch %d != %d\n", number, errno) > "/dev/stderr";
exit(1);
}
perror(name, number, desc);
errno++;
}
END {
printf("};\n\n");
printf("const int sys_nerr = sizeof(errlist) / sizeof(errlist[0]);\n");
printf("const char * const *sys_errlist = errlist;\n");
}