usr.bin/genassym/genassym.sh

   1 #!/bin/sh -
   2 #       $NetBSD: genassym.sh,v 1.8 2014/01/06 22:43:15 christos Exp $
   3 #
   4 # Copyright (c) 1997 Matthias Pfaller.
   5 # All rights reserved.
   6 #
   7 # Redistribution and use in source and binary forms, with or without
   8 # modification, are permitted provided that the following conditions
   9 # are met:
  10 # 1. Redistributions of source code must retain the above copyright
  11 #    notice, this list of conditions and the following disclaimer.
  12 # 2. Redistributions in binary form must reproduce the above copyright
  13 #    notice, this list of conditions and the following disclaimer in the
  14 #    documentation and/or other materials provided with the distribution.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 #
  27
  28 progname="$(basename "${0}")"
  29 : ${AWK:=awk}
  30
  31 ccode=0         # generate temporary C file, compile it, execute result
  32 fcode=0         # generate Forth code
  33
  34 usage()
  35 {
  36
  37         echo "usage: ${progname} [-c | -f] -- compiler command" >&2
  38 }
  39
  40 set -e
  41
  42 while getopts cf i
  43 do
  44         case "$i" in
  45         c)
  46                 ccode=1
  47                 ;;
  48         f)
  49                 fcode=1
  50                 ;;
  51         esac
  52 done
  53 shift "$(($OPTIND - 1))"
  54 if [ $# -eq 0 ]; then
  55         usage
  56         exit 1
  57 fi
  58
  59 # Deal with any leading environment settings..
  60
  61 while [ -n "$1" ]
  62 do
  63         case "$1" in
  64         *=*)
  65                 eval export "$1"
  66                 shift
  67                 ;;
  68         *)
  69                 break
  70                 ;;
  71         esac
  72 done
  73
  74 genassym_temp="$(mktemp -d "${TMPDIR-/tmp}/genassym.XXXXXX")"
  75
  76
  77 if [ ! -d $genassym_temp ]; then
  78         echo "${progname}: unable to create temporary directory" >&2
  79         exit 1
  80 fi
  81 trap "rm -rf $genassym_temp" 0 1 2 3 15
  82
  83 $AWK '
  84 BEGIN {
  85         printf("#if __GNUC__ >= 4\n");
  86         printf("#define offsetof(type, member) __builtin_offsetof(type, member)\n");
  87         printf("#else\n");
  88         printf("#define offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
  89         printf("#endif\n");
  90         defining = 0;
  91         type = "long";
  92         asmtype = "n";
  93         asmprint = "";
  94 }
  95
  96 {
  97         doing_member = 0;
  98 }
  99
 100 $0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
 101         # Just ignore comments and empty lines
 102         next;
 103 }
 104
 105 $0 ~ /^config[ \t]/ {
 106         type = $2;
 107         asmtype = $3;
 108         asmprint = $4;
 109         next;
 110 }
 111
 112 /^include[ \t]/ {
 113         if (defining != 0) {
 114                 defining = 0;
 115                 printf("}\n");
 116         }
 117         printf("#%s\n", $0);
 118         next;
 119 }
 120
 121 $0 ~ /^if[ \t]/ ||
 122 $0 ~ /^ifdef[ \t]/ ||
 123 $0 ~ /^ifndef[ \t]/ ||
 124 $0 ~ /^else/ ||
 125 $0 ~ /^elif[ \t]/ ||
 126 $0 ~ /^endif/ {
 127         printf("#%s\n", $0);
 128         next;
 129 }
 130
 131 /^struct[ \t]/ {
 132         structname = $2;
 133         $0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
 134         # fall through
 135 }
 136
 137 /^member[ \t]/ {
 138         if (NF > 2)
 139                 $0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
 140         else
 141                 $0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
 142         doing_member = 1;
 143         # fall through
 144 }
 145
 146 /^export[ \t]/ {
 147         $0 = "define " $2 " " $2;
 148         # fall through
 149 }
 150
 151 /^define[ \t]/ {
 152         if (defining == 0) {
 153                 defining = 1;
 154                 printf("void f" FNR "(void);\n");
 155                 printf("void f" FNR "(void) {\n");
 156                 if (ccode)
 157                         call[FNR] = "f" FNR;
 158                 defining = 1;
 159         }
 160         value = $0
 161         gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
 162         if (ccode)
 163                 printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
 164         else if (fcode) {
 165                 if (doing_member)
 166                         printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
 167                 else
 168                         printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
 169         } else
 170                 printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
 171         next;
 172 }
 173
 174 /^quote[ \t]/ {
 175         gsub("^quote[ \t]+", "");
 176         print;
 177         next;
 178 }
 179
 180 {
 181         printf("syntax error in line %d\n", FNR) >"/dev/stderr";
 182         exit(1);
 183 }
 184
 185 END {
 186         if (defining != 0) {
 187                 defining = 0;
 188                 printf("}\n");
 189         }
 190         if (ccode) {
 191                 printf("int main(int argc, char **argv) {");
 192                 for (i in call)
 193                         printf(call[i] "();");
 194                 printf("return(0); }\n");
 195         }
 196 }
 197 ' ccode="$ccode" fcode="$fcode" > "${genassym_temp}/assym.c" || exit 1
 198
 199 if [ "$ccode" = 1 ]; then
 200         "$@" "${genassym_temp}/assym.c" -o "${genassym_temp}/genassym" && \
 201             "${genassym_temp}/genassym"
 202 elif [ "$fcode" = 1 ]; then
 203         # Kill all of the "#" and "$" modifiers; locore.s already
 204         # prepends the correct "constant" modifier.
 205         "$@" -S "${genassym_temp}/assym.c" -o - | sed -e 's/\$//g' | \
 206             sed -n 's/.*XYZZY//gp'
 207 else
 208         # Kill all of the "#" and "$" modifiers; locore.s already
 209         # prepends the correct "constant" modifier.
 210         "$@" -S "${genassym_temp}/assym.c" -o - > \
 211             "${genassym_temp}/genassym.out" && \
 212             sed -e 's/#//g' -e 's/\$//g' < "${genassym_temp}/genassym.out" | \
 213             sed -n 's/.*XYZZY/#define/gp'
 214 fi