#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (C) 2006 Daniel M. Eischen. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
#
# Make a list of all the library versions listed in the master file.
#
# versions[] - array indexed by version name, contains number
# of symbols (+ 1) found for each version.
# successors[] - array index by version name, contains successor
# version name.
# symbols[][] - array index by [version name, symbol index], contains
# names of symbols defined for each version.
# names[] - array index is symbol name and value is its first version seen,
# used to check for duplicate symbols and warn about them.
#
BEGIN {
brackets = 0;
errors = warns = 0;
version_count = 0;
current_version = "";
stderr = "/dev/stderr";
while (getline < vfile) {
# Strip comments.
sub("#.*$", "", $0);
# Strip leading and trailing whitespace.
sub("^[ \t]+", "", $0);
sub("[ \t]+$", "", $0);
if (/^[a-zA-Z0-9._]+[ \t]*{$/) {
# Strip brace.
sub("{", "", $1);
brackets++;
symver = $1;
versions[symver] = 1;
successors[symver] = "";
generated[symver] = 0;
version_count++;
}
else if (/^}[ \t]*[a-zA-Z0-9._]+[ \t]*;$/) {
v = $1 != "}" ? $1 : $2;
# Strip brace.
sub("}", "", v);
# Strip semicolon.
sub(";", "", v);
if (symver == "") {
printf("File %s: Unmatched bracket.\n",
vfile) > stderr;
errors++;
}
else if (versions[v] != 1) {
printf("File %s: `%s' has unknown " \
"successor `%s'.\n",
vfile, symver, v) > stderr;
errors++;
}
else
successors[symver] = v;
brackets--;
}
else if (/^}[ \t]*;$/) {
if (symver == "") {
printf("File %s: Unmatched bracket.\n",
vfile) > stderr;
errors++;
}
# No successor
brackets--;
}
else if (/^}$/) {
printf("File %s: Missing final semicolon.\n",
vfile) > stderr;
errors++;
}
else if (/^$/)
; # Ignore blank lines.
else {
printf("File %s: Unknown directive: `%s'.\n",
vfile, $0) > stderr;
errors++;
}
}
brackets = 0;
}
{
# Set meaningful filename for diagnostics.
filename = FILENAME != "" ? FILENAME : "<stdin>";
# Delete comments, preceding and trailing whitespace, then
# consume blank lines.
sub("#.*$", "", $0);
sub("^[ \t]+", "", $0);
sub("[ \t]+$", "", $0);
if ($0 == "")
next;
}
/^[a-zA-Z0-9._]+[ \t]*{$/ {
# Strip bracket from version name.
sub("{", "", $1);
if (current_version != "") {
printf("File %s, line %d: Illegal nesting detected.\n",
filename, FNR) > stderr;
errors++;
}
else if (versions[$1] == 0) {
printf("File %s, line %d: Undefined " \
"library version `%s'.\n", filename, FNR, $1) > stderr;
errors++;
# Remove this entry from the versions.
delete versions[$1];
}
else
current_version = $1;
brackets++;
next;
}
/^[a-zA-Z0-9._]+[ \t]*;$/ {
# Strip semicolon.
sub(";", "", $1);
if (current_version != "") {
count = versions[current_version];
versions[current_version]++;
symbols[current_version, count] = $1;
if ($1 in names && names[$1] != current_version) {
#
# A graver case when a dup symbol appears under
# different versions in the map. That can result
# in subtle problems with the library later.
#
printf("File %s, line %d: Duplicated symbol `%s' " \
"in version `%s', first seen in `%s'. " \
"Did you forget to move it to ObsoleteVersions?\n",
filename, FNR, $1,
current_version, names[$1]) > stderr;
errors++;
}
else if (names[$1] == current_version) {
#
# A harmless case: a dup symbol with the same version.
#
printf("File %s, line %d: warning: " \
"Duplicated symbol `%s' in version `%s'.\n",
filename, FNR, $1, current_version) > stderr;
warns++;
}
else
names[$1] = current_version;
}
else {
printf("File %s, line %d: Symbol `%s' outside version scope.\n",
filename, FNR, $1) > stderr;
errors++;
}
next;
}
/^}[ \t]*;$/ {
brackets--;
if (brackets < 0) {
printf("File %s, line %d: Unmatched bracket.\n",
filename, FNR, $1) > stderr;
errors++;
brackets = 0; # Reset
}
current_version = "";
next;
}
{
printf("File %s, line %d: Unknown directive: `%s'.\n",
filename, FNR, $0) > stderr;
errors++;
}
function print_version(v)
{
# This function is recursive, so return if this version
# has already been printed. Otherwise, if there is an
# ancestral version, recursively print its symbols before
# printing the symbols for this version.
#
if (generated[v] == 1)
return;
if (successors[v] != "")
print_version(successors[v]);
printf("%s {\n", v);
# The version count is always one more that actual,
# so the loop ranges from 1 to n-1.
#
for (i = 1; i < versions[v]; i++) {
if (i == 1)
printf("global:\n");
printf("\t%s;\n", symbols[v, i]);
}
version_count--;
if (version_count == 0) {
printf("local:\n");
printf("\t*;\n");
}
if (successors[v] == "")
printf("};\n");
else
printf("} %s;\n", successors[v]);
printf("\n");
generated[v] = 1;
}
END {
if (errors) {
printf("%d error(s) total.\n", errors) > stderr;
exit(1);
}
# OK, no errors.
for (v in versions) {
print_version(v);
}
}
