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###########################################################
### SMB Build System ###
### - config.mk parsing functions ###
### ###
### Copyright (C) Stefan (metze) Metzmacher 2004 ###
### Released under the GNU GPL ###
###########################################################
package config_mk;
use smb_build::input;
use strict;
my %attribute_types = (
"NOPROTO" => "string",
"REQUIRED_SUBSYSTEMS" => "list",
"OUTPUT_TYPE" => "string",
"INIT_OBJ_FILES" => "list",
"ADD_OBJ_FILES" => "list",
"OBJ_FILES" => "list",
"SUBSYSTEM" => "string",
"INIT_FUNCTION" => "string",
"MAJOR_VERSION" => "string",
"MINOR_VERSION" => "string",
"RELEASE_VERSION" => "string",
"ENABLE" => "bool"
);
###########################################################
# The parsing function which parses the file
#
# $result = _parse_config_mk($filename)
#
# $filename - the path of the config.mk file
# which should be parsed
#
# $result - the resulting structure
#
# $result->{ERROR_CODE} - the error_code, '0' means success
# $result->{ERROR_STR} - the error string
#
# $result->{$key}{KEY} - the key == the variable which was parsed
# $result->{$key}{VAL} - the value of the variable
sub _parse_config_mk($)
{
my $filename = shift;
my $result;
my $linenum = -1;
my $waiting = 0;
my $section = "GLOBAL";
my $key;
$result->{ERROR_CODE} = -1;
open(CONFIG_MK, "< $filename") || die ("Can't open $filename\n");
while (<CONFIG_MK>) {
my $line = $_;
my $val;
$linenum++;
#
# lines beginnig with '#' are ignored
#
if ($line =~ /^\#.*$/) {
next;
}
#
#
#
if (($waiting == 0) && ($line =~ /^\[([a-zA-Z0-9_:]+)\][\t ]*$/)) {
$section = $1;
next;
}
#
# 1.) lines with an alphanumeric character indicate
# a new variable,
# 2.) followed by zero or more whitespaces or tabs
# 3.) then one '=' character
# 4.) followed by the value of the variable
# 5.) a newline ('\n') can be escaped by a '\' before the newline
# and the next line needs to start with a tab ('\t')
#
if (($waiting == 0) && ($line =~ /^([a-zA-Z0-9_]+)[\t ]*=(.*)$/)) {
$key = $1;
$val = $2;
#
# when we have a '\' before the newline
# then skip it and wait for the next line.
#
if ($val =~ /(.*)(\\)$/) {
$val = $1;
$waiting = 1;
} else {
$waiting = 0;
}
$result->{$section}{$key}{KEY} = $key;
$result->{$section}{$key}{VAL} = $val;
next;
}
#
# when we are waiting for a value to continue then
# check if it has a leading tab.
#
if (($waiting == 1) && ($line =~ /^\t(.*)$/)) {
$val = $1;
#
# when we have a '\' before the newline
# then skip it and wait for the next line.
#
if ($val =~ /(.*)( \\)$/) {
$val = $1;
$waiting = 1;
} else {
$waiting = 0;
}
$result->{$section}{$key}{VAL} .= " ";
$result->{$section}{$key}{VAL} .= $val;
next;
}
#
# catch empty lines they're ignored
# and we're no longer waiting for the value to continue
#
if ($line =~ /^$/) {
$waiting = 0;
next;
}
close(CONFIG_MK);
$result->{ERROR_STR} = "Bad line while parsing $filename\n$filename:$linenum: $line";
return $result;
}
close(CONFIG_MK);
$result->{ERROR_CODE} = 0;
return $result;
}
sub import_file($$)
{
my $input = shift;
my $filename = shift;
my $result = _parse_config_mk($filename);
die ($result->{ERROR_STR}) unless $result->{ERROR_CODE} == 0;
foreach my $section (keys %{$result}) {
next if ($section eq "ERROR_CODE");
my ($type, $name) = split(/::/, $section, 2);
$input->{$name}{NAME} = $name;
$input->{$name}{TYPE} = $type;
foreach my $key (values %{$result->{$section}}) {
$key->{VAL} = input::strtrim($key->{VAL});
my $vartype = $attribute_types{$key->{KEY}};
if (not defined($vartype)) {
die("Unknown attribute $key->{KEY}");
}
if ($vartype eq "string") {
$input->{$name}{$key->{KEY}} = $key->{VAL};
} elsif ($vartype eq "list") {
$input->{$name}{$key->{KEY}} = [input::str2array($key->{VAL})];
} elsif ($vartype eq "bool") {
if (($key->{VAL} ne "YES") and ($key->{VAL} ne "NO")) {
die("Invalid value for bool attribute $key->{KEY}: $key->{VAL}");
}
$input->{$name}{$key->{KEY}} = $key->{VAL};
}
}
}
}
1;
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