| 1 | #!/usr/bin/awk -f
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| 2 | #
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| 3 | # Copyright (c) 2018 CZ.NIC, z.s.p.o.
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| 4 | # All rights reserved.
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| 5 | #
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| 6 | # Redistribution and use in source and binary forms, with or without
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| 7 | # modification, are permitted provided that the following conditions
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| 8 | # are met:
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| 9 | #
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| 10 | # - Redistributions of source code must retain the above copyright
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| 11 | # notice, this list of conditions and the following disclaimer.
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| 12 | # - Redistributions in binary form must reproduce the above copyright
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| 13 | # notice, this list of conditions and the following disclaimer in the
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| 14 | # documentation and/or other materials provided with the distribution.
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| 15 | # - The name of the author may not be used to endorse or promote products
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| 16 | # derived from this software without specific prior written permission.
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| 17 | #
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| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | #
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| 29 |
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| 30 | # Authors:
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| 31 | # Jiří Zárevúcky <jiri.zarevucky@nic.cz>
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| 32 |
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| 33 | BEGIN {
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| 34 | filename = ARGV[1]
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| 35 | print "// Generated file. Fix the included header if static assert fails."
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| 36 | print "#include \"" filename "\""
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| 37 | }
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| 38 |
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| 39 | /}.*;/ {
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| 40 | pattern = "}( __attribute__\\(.*\\))? " struct_name "_t;"
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| 41 | if ($0 ~ pattern) {
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| 42 | macro_name = toupper(struct_name) "_SIZE"
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| 43 | print "_Static_assert(" macro_name " == sizeof(struct " struct_name "), \"\");"
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| 44 | struct_name = ""
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | /;$/ {
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| 49 | if (struct_name != "" && $0 !~ "}") {
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| 50 | # Remove array subscript, if any.
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| 51 | sub("(\\[.*\\])?;", "", $0)
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| 52 | member = $NF
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| 53 |
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| 54 | macro_name = toupper(struct_name) "_OFFSET_" toupper(member)
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| 55 | print "_Static_assert(" macro_name " == __builtin_offsetof(struct " struct_name ", " member "), \"\");"
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| 56 |
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| 57 | macro_name = toupper(struct_name) "_SIZE_" toupper(member)
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| 58 | print "#ifdef " macro_name
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| 59 | print "_Static_assert(" macro_name " == sizeof(((struct " struct_name "){ })." member "), \"\");"
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| 60 | print "#endif"
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | /^typedef struct .* \{/ {
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| 65 | struct_name = $3
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| 66 | }
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