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# awk script to create a C file from summary.texinfo
# Copyright (C) 2013 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
# This script groks the summary.texi (summary.awk output) format.
# It produces a compilable C file attempts to refer to each declaration
# in summary.texi so as to verify that the types in the manual match the
# types in the code.
BEGIN {
wraps["@w{"] = 1;
wraps["@t{"] = 1;
wraps["@emph{"] = 1;
print "/* This file is generated by summary-check.awk; DO NOT EDIT! */";
print "";
}
NF == 2 && $1 == "@comment" {
ident = $2;
optional = 0;
next
}
NF == 3 && $1 == "@comment" && $3 = "(optional)" {
ident = $2;
optional = 1;
next
}
NF >= 4 && $1 == "@c" {
source = $2;
lineno = $3;
flavor = $4;
for (i = 5; i <= NF; ++i)
flavor = flavor " " $i;
next
}
$1 == "@item" {
$1 = "";
gsub(/@var{[^}]+}/, "");
gsub(/@dots{}/, "...");
gsub(/@\*/, " ");
decl = $0 ";";
for (wrap in wraps) {
len = length(wrap);
while ((first = match(decl, wrap)) > 0) {
depth = 1;
for (i = first + len; i < length(decl); ++i) {
c = substr(decl, i, 1);
if (c == "{") ++depth;
else if (c == "}" && --depth == 0) {
left = substr(decl, 1, first - 1);
middle = substr(decl, first + len, i - (first + len));
right = substr(decl, i + 1);
decl = left middle right;
break;
}
}
}
}
sub(/\.\.\.,.+);/, "...);", decl); # execle
sub(/\[,[^],]+\]/, ", ...", decl); # open
next
}
/^@file{/ {
gsub(/[^a-zA-Z0-9_]/, "", ident);
undef = 1;
if (flavor ~ /@defvrx?/) {
# These are used for feature-test macros. There is nothing we can test.
next;
}
if (flavor ~ /@itemx?/ || flavor == "@vindex") {
# These are used for macros, but we have no type information.
next;
}
if (flavor == "@defvar") {
# These are used for variables, but we have no type information.
next;
}
if (flavor == "@defmac") {
# These are used for function-like macros, but we have no type information.
next;
}
if (flavor ~ /^@deftypevrx? {Data type}$/ || flavor == "@deftp") {
# This is a type. We can just test that it's usable.
decl = "extern " ident " test_" ident ";";
}
else if (flavor ~ /^@deftypevrx?/) {
# These are used for macros.
sub(ident, "test_" ident " (void) { return " ident "; }", decl);
undef = 0
}
if (decl ~ /float-type/ || decl ~ /real-floating/) {
# Special case: these are function-like macros that
# cannot be redeclared. There isn't a simple way to test.
next
}
if (ident in seen)
next;
seen[ident] = 1
gsub(/,/, "");
for (i = 1; i <= NF && $i ~ /@file{[^}]+}/; ++i) {
header = gensub(/@file{([^}]+)}/, "\\1", 1, $i);
print "#include", "<" header ">";
}
if (optional)
print "#ifdef", ident;
else if (undef)
print "#undef", ident;
print "#", lineno, "\"" source "\"";
print decl;
if (optional)
print "#endif", "/*", ident, "*/";
}
END {
print "";
print "int main (void)";
print "{";
print " return 0;";
print "}";
}
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