[src/trunk]: src/lib/libc/gen Automatically generate the error list.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fa5df4b0cb77
branches:  trunk
changeset: 759560:fa5df4b0cb77
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Dec 12 20:08:27 2010 +0000

description:
Automatically generate the error list.

diffstat:

 lib/libc/gen/errlist.awk |  92 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 92 insertions(+), 0 deletions(-)

diffs (96 lines):

diff -r b5b3f71b3c6a -r fa5df4b0cb77 lib/libc/gen/errlist.awk
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/gen/errlist.awk  Sun Dec 12 20:08:27 2010 +0000
@@ -0,0 +1,92 @@
+#! /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");
+}