lib/libc/gen/errlist.awk

   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("%s\n error number mismatch %d != %d\n", $0, number, errno) > "/dev/stderr";
  90                 exit(1);
  91         }
  92         while(errno < number) {
  93                 perror("UNDEFINED", errno, "Undefined error: " errno);
  94                 errno++;
  95         }
  96         perror(name, number, desc);
  97         errno++;
  98 }
  99 END {
 100         printf("};\n\n");
 101         if (!concat) {
 102                 printf("const int sys_nerr = sizeof(errlist) / sizeof(errlist[0]);\n");
 103                 printf("const char * const *sys_errlist = errlist;\n");
 104         } else {
 105                 printf("static const int concat_nerr = %d;\n", errno);
 106                 printf("static const unsigned short concat_offset[] = {\n");
 107                 offsets[errno++] = offset;
 108                 for (j = 0; j < errno; j++) {
 109                         printf("\t%d,\n", offsets[j]);
 110                 }
 111                 printf("};\n");
 112                 if (offset > 65535) {
 113                         printf("Total errlist size doesn't fit into 16bit\n") > "/dev/stderr";
 114                         exit(1);
 115                 }
 116         }
 117 }