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errlist.awk revision 1.4 
      1 #! /usr/bin/awk -f
      2 #	$NetBSD: errlist.awk,v 1.4 2010/12/16 22:52:32 joerg Exp $
      3 #
      4 # Copyright (c) 2010 The NetBSD Foundation, Inc.
      5 # All rights reserved.
      6 #
      7 # This code is derived from software contributed to The NetBSD Foundation
      8 # by Christos Zoulas.
      9 #
     10 # Redistribution and use in source and binary forms, with or without
     11 # modification, are permitted provided that the following conditions
     12 # are met:
     13 # 1. Redistributions of source code must retain the above copyright
     14 #    notice, this list of conditions and the following disclaimer.
     15 # 2. Redistributions in binary form must reproduce the above copyright
     16 #    notice, this list of conditions and the following disclaimer in the
     17 #    documentation and/or other materials provided with the distribution.
     18 # 3. All advertising materials mentioning features or use of this software
     19 #    must display the following acknowledgement:
     20 #        This product includes software developed by the NetBSD
     21 #        Foundation, Inc. and its contributors.
     22 # 4. Neither the name of The NetBSD Foundation nor the names of its
     23 #    contributors may be used to endorse or promote products derived
     24 #    from this software without specific prior written permission.
     25 #
     26 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36 # POSSIBILITY OF SUCH DAMAGE.
     37 #
     38 function tabs(desc) {
     39 	l = length(desc) + 3;
     40 	if (concat)
     41 		l++
     42 	if (l < 16)
     43 		return "\t\t\t\t";
     44 	else if (l < 24)
     45 		return "\t\t\t";
     46 	else if (l < 32)
     47 		return "\t\t";
     48 	else if (l < 40)
     49 		return "\t";
     50 	else
     51 		return "";
     52 }
     53 function perror(name, number, desc)
     54 {
     55 	if (!concat) {
     56 		printf("\t\"%s\",%s/* %d - %s */\n", desc, tabs(desc), number, name);
     57 	} else {
     58 		offsets[number] = offset;
     59 		offset += length(desc) + 1;
     60 		printf("\t\"%s\\0\"%s/* %d - %s */\n", desc, tabs(desc), number, name);
     61 	}
     62 }
     63 BEGIN {
     64 	printf("/* Automatically generated file; do not edit */\n");
     65 	printf("#include <sys/cdefs.h>\n");
     66 	printf("__RCSID(\"$NetBSD: errlist.awk,v 1.4 2010/12/16 22:52:32 joerg Exp $\");\n");
     67 	printf("#include <errno.h>\n");
     68 	if (!concat) {
     69 		printf("static const char *const errlist[] = {\n");
     70 	} else {
     71 		printf("static const char concat_errlist[] = {\n");
     72 		offset = 0;
     73 	}
     74 	perror("ENOERROR", 0, "Undefined error: 0");
     75 	errno = 1;
     76 }
     77 /^#define/ {
     78 	name = $2;
     79 	if (name == "ELAST")
     80 		next;
     81 	number = $3;
     82 	if (number < 0 || number == "EAGAIN")
     83 		next;
     84 	desc = $0;
     85 	i1 = index(desc, "/*") + 3;
     86 	l = length(desc);
     87 	desc = substr(desc, i1, l - i1 - 2);
     88 	if (number != errno) {
     89 		printf("error number mismatch %d != %d\n", number, errno) > "/dev/stderr";
     90 		exit(1);
     91 	}
     92 	perror(name, number, desc);
     93 	errno++;
     94 }
     95 END {
     96 	printf("};\n\n");
     97 	if (!concat) {
     98 		printf("const int sys_nerr = sizeof(errlist) / sizeof(errlist[0]);\n");
     99 		printf("const char * const *sys_errlist = errlist;\n");
    100 	} else {
    101 		printf("static const int concat_nerr = %d;\n", errno);
    102 		printf("static const unsigned short concat_offset[] = {\n");
    103 		offsets[errno++] = offset;
    104 		for (j = 0; j < errno; j++) {
    105 			printf("\t%d,\n", offsets[j]);
    106 		}
    107 		printf("};\n");
    108 		if (offset > 65535) {
    109 			printf("Total errlist size doesn't fit into 16bit\n") > "/dev/stderr";
    110 			exit(1);
    111 		}
    112 	}
    113 }
    114