From: Joey Schulze <joey@infodrom.org>
Date: Thu, 4 Oct 2012 20:39:47 +0000 (+0200)
Subject: Improve LaTeX conversion
X-Git-Url: https://git.infodrom.org/?p=misc%2Fhallinta-metro;a=commitdiff_plain;h=61287833c26f7cec4d447c35438ace6e42ea5b18

Improve LaTeX conversion
---

diff --git a/utils.php b/utils.php
index 694c1ee..f998ced 100644
--- a/utils.php
+++ b/utils.php
@@ -22,11 +22,26 @@ function rm_tempdir($dir)
   system(sprintf("rm -rf %s", $dir));
 }
 
+function latexspecialchars($string)
+{
+  $map = array(
+	       "#"=>"\\#",
+	       "$"=>"\\$",
+	       "%"=>"\\%",
+	       "&"=>"\\&",
+	       "~"=>"\\~{}",
+	       "_"=>"\\_",
+	       "^"=>"\\^{}",
+	       "\\"=>"\\textbackslash",
+	       "{"=>"\\{",
+	       "}"=>"\\}",
+	       );
+  return preg_replace("/([\^\%~\\\\#\$%&_\{\}])/e", "\$map['$1']", $string);
+}
+
 function latex_encode($text)
 {
-  return str_replace(array("\\",'%','&'),
-		     array('\\','\%','\&'),
-		     utf8_decode($text));
+  return latexspecialchars(utf8_decode($text));
 }
 
 function ordersatz_archive($id, $title, $filename)