From 5044f565d2699e20e221ba1750062241d8babe97 Mon Sep 17 00:00:00 2001
From: b <b@bicyclesonthemoon.info>
Date: Sat, 10 Sep 2022 16:12:13 +0000
Subject: [PATCH] Replacement functionality now works.

---
 configure.pl          | 108 +++++++++++++++++++++++++++++++++++++-----
 settings_template.txt |   1 -
 2 files changed, 96 insertions(+), 13 deletions(-)

diff --git a/configure.pl b/configure.pl
index ce2ac6d..1caa813 100755
--- a/configure.pl
+++ b/configure.pl
@@ -1,11 +1,10 @@
 #!/usr/bin/perl
 
 # configure.pl
-#
-# This script is called from the makefile. It reads the settings file and
-# inserts the information in the source files.
-#
-#    Copyright (C) 2015-2017, 2022  Balthasar Szczepański
+
+# The new BOTM configuration tool
+
+#    Copyright (C) 2022  Balthasar Szczepański
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
@@ -36,6 +35,8 @@ use constant ESCAPE     => '_ESCAPE';
 use constant URL_ENCODE => '_URL_ENCODE';
 use constant PATH       => '_PATH';
 use constant SPRINTF    => '_SPRINTF';
+use constant DEBUG      => '_DEBUG';
+use constant DEBUG_ALL  => '_DEBUG_ALL';
 
 # TODO more special functions
 
@@ -48,14 +49,72 @@ foreach my $arg (@ARGV) {
 	%cfg = parse_file($arg, 0, %cfg);
 }
 
+my %replace_line;
+my %replace_keyword;
+my $debug = '';
+my $debug_all = '';
+my $match_line;
+my $match_keyword;
+
 foreach my $key (keys %cfg) {
-	print $key.': >'.$cfg{$key}."<\n";
+	if ($debug_all ne ''){
+		$debug_all .= "\n";
+	}
+	$debug_all .= "$key: $cfg{$key}";
+	unless((substr($key,0,1) eq '_') or ($key =~ /^[0-9]+$/)){
+		if ($debug ne ''){
+			$debug .= "\n";
+		}
+		$debug .= "$key: $cfg{$key}";
+		$match_line = parse_pattern(REPLACE_LINE(), "($key)", 0, %cfg);
+		$match_keyword = parse_pattern(REPLACE_KEYWORD(), "($key)", 0, %cfg);
+		$replace_line{$match_line} = $cfg{$key};
+		$replace_keyword{$match_keyword} = $cfg{$key};
+	}
+}
+$match_line = parse_pattern(REPLACE_LINE(), '('.DEBUG().')', 0, %cfg);
+$match_keyword = parse_pattern(REPLACE_KEYWORD(), '('.DEBUG().')', 0, %cfg);
+$replace_line{$match_line} = $debug;
+$replace_keyword{$match_keyword} = $debug;
+$match_line = parse_pattern(REPLACE_LINE(), '('.DEBUG_ALL().')', 0, %cfg);
+$match_keyword = parse_pattern(REPLACE_KEYWORD(), '('.DEBUG_ALL().')', 0, %cfg);
+$replace_line{$match_line} = $debug_all;
+$replace_keyword{$match_keyword} = $debug_all;
+my $status;
+LINE: while (defined(my $line = <STDIN>)) {
+	$line =~ s/[\r\n]//g;
+	foreach my $key (keys %replace_line) {
+		if (index($line, $key) >= 0) {
+			print "$replace_line{$key}\n";
+			next LINE;
+		}
+	}
+	foreach my $key (keys %replace_keyword) {
+		do {
+			($status, $line) = replace($line, $key, $replace_keyword{$key});
+		} while ($status);
+	}
+	print "$line\n";
 }
 
-# TODO: OK we have settings parsing done.
-#       Now parse the actual files, do the replacements
+# replace WITHOUT REGEXP
+sub replace {
+	(my $text, my $to_replace, my $replacement) = @_;
+	
+	my $ind = index($text, $to_replace);
+	if ($ind <0) {
+		return (0, $text);
+	}
+	my $len = length($to_replace);
+	
+	my $before = substr($text, 0, $ind);
+	my $after = substr($text, $ind+$len);
+	
+	return (1, $before.$replacement.$after);
+}
 
-sub unescape {
+
+sub unescape1ch {
 	(my $to_escape) = @_;
 	
 	if    ($to_escape eq 'a') { return "\a";}
@@ -68,6 +127,31 @@ sub unescape {
 	else                      { return $to_escape;}
 }
 
+sub escape {
+	(my $text, my $match) = @_;
+	unless (defined $match) {
+		$match = '[\\\\\\\'\\\"]';
+	}
+	
+	my $outcome = '';
+	foreach my $ch (split('', $text)) {
+		if ($ch =~ $match) {
+			if    ($ch eq "\a") { $outcome .= '\\a';}
+			elsif ($ch eq "\b") { $outcome .= '\\b';}
+			elsif ($ch eq "\e") { $outcome .= '\\e';}
+			elsif ($ch eq "\f") { $outcome .= '\\f';}
+			elsif ($ch eq "\n") { $outcome .= '\\n';}
+			elsif ($ch eq "\r") { $outcome .= '\\r';}
+			elsif ($ch eq "\t") { $outcome .= '\\t';}
+			else                { $outcome .= '\\'.$ch;}
+		}
+		else {
+			$outcome .= $ch;
+		}
+	}
+	return $outcome;
+}
+
 sub urlencode {
 	(my $text, my $match) = @_;
 	unless (defined $match) {
@@ -238,7 +322,7 @@ sub parse_pattern {
 	
 		while ($to_parse ne '') {
 			if ($to_parse =~ /^\\(.)(.*)$/) {
-				$parsed .= unescape($1);
+				$parsed .= unescape1ch($1);
 				$to_parse = $2;
 			}
 			elsif ($to_parse =~ /^\$([A-Za-z0-9_\-\.]+)(.*)$/) {
@@ -260,7 +344,7 @@ sub parse_pattern {
 		return $parsed;
 	}
 	elsif ($name eq ESCAPE) {
-		return '+'; #TODO
+		return escape(@parameter_list);
 	}
 	elsif ($name eq URL_ENCODE) {
 		return urlencode(@parameter_list);
@@ -296,7 +380,7 @@ sub parse_value {
 	while ($to_parse ne '') {
 		# escape
 		if ($to_parse =~ /^\\(.)(.*)$/) {
-			$parsed .= unescape($1);
+			$parsed .= unescape1ch($1);
 			$to_parse = $2;
 		}
 		elsif ($to_parse =~ /^\$([A-Za-z0-9_\-\.]+)(.*)$/) {
diff --git a/settings_template.txt b/settings_template.txt
index 7ea3146..e69de29 100644
--- a/settings_template.txt
+++ b/settings_template.txt
@@ -1 +0,0 @@
-p0 = $_SPRINTF(%02x %02x,44,22)
-- 
2.30.2