tools/autocheck.awk

   1 #!/usr/bin/awk -f
   2 #
   3 # Copyright (c) 2018 CZ.NIC, z.s.p.o.
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 #
  10 # - Redistributions of source code must retain the above copyright
  11 #   notice, this list of conditions and the following disclaimer.
  12 # - 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 # - The name of the author may not be used to endorse or promote products
  16 #   derived from this software without specific prior written permission.
  17 #
  18 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 #
  29
  30 # Authors:
  31 #       Jiří Zárevúcky <jiri.zarevucky@nic.cz>
  32
  33 BEGIN {
  34         filename = ARGV[1]
  35         print "// Generated file. Fix the included header if static assert fails."
  36         print "#include \"" filename "\""
  37 }
  38
  39 /}.*;/ {
  40         pattern = "}( __attribute__\\(.*\\))? (" struct_name "_t)?;"
  41         if ($0 !~ pattern) {
  42                 print("Bad struct ending: " $0) > "/dev/stderr"
  43                 exit 1
  44         }
  45         macro_name = toupper(struct_name) "_SIZE"
  46         print "_Static_assert(" macro_name " == sizeof(struct " struct_name "), \"\");"
  47         struct_name = ""
  48 }
  49
  50 /;$/ {
  51         if (struct_name != "") {
  52                 # Remove array subscript, if any.
  53                 sub("(\\[.*\\])?;", "", $0)
  54                 member = $NF
  55
  56                 macro_name = toupper(struct_name) "_OFFSET_" toupper(member)
  57                 print "_Static_assert(" macro_name " == __builtin_offsetof(struct " struct_name ", " member "), \"\");"
  58
  59                 macro_name = toupper(struct_name) "_SIZE_" toupper(member)
  60                 print "#ifdef " macro_name
  61                 print "_Static_assert(" macro_name " == sizeof(((struct " struct_name "){ })." member "), \"\");"
  62                 print "#endif"
  63         }
  64 }
  65
  66 /^typedef struct .* \{/ {
  67         struct_name = $3
  68 }