update math function with format attribute

NEWS

@@ -1,8 +1,13 @@
+    - added format attribute to math function (Monte)
     - added html_select_time custom function. (Andrei)
+    - fixed minor PHP warning when attempting to unset an unset variable
+      (Monte)
+    - added count_characters, count_words, count_sentences, count_paragraphs
+      modifiers (Monte)
 
 Version 1.3.1pl1
 --------------
-    - bug fix, recovered missing _syntax_error function
+    - bug fix, recovered missing _syntax_error function (Monte)
 
 Version 1.3.1
 -------------

Smarty.addons.php

@@ -404,7 +404,7 @@ function smarty_func_math() {
         }
        
         foreach($args as $key => $val) {
-            if($key != "equation") {
+            if($key != "equation" && $key != "format") {
                 // make sure value is not empty
                 if(strlen($val)==0) {
                     trigger_error("math: parameter $key is empty");
@@ -418,7 +418,12 @@ function smarty_func_math() {
             }
         }
                
-        eval("echo ".$equation.";");
+    eval("\$smarty_math_result = ".$equation.";");
+
+    if(empty($args["format"]))
+        echo $smarty_math_result;
+    else
+        printf($args["format"],$smarty_math_result);
 }
 
 /*======================================================================*\
@@ -428,14 +433,60 @@ function smarty_func_math() {
 function smarty_func_fetch() {
     extract(func_get_arg(0));
 
-    if (empty($file)) {
+        if(empty($file)) {
             trigger_error("parameter 'file' cannot be empty");
             return;                    
         }
-
         readfile($file);
 }
 
+/*======================================================================*\
+    Function: smarty_mod_count_characters
+    Purpose:  count the number of characters in a text
+\*======================================================================*/
+function smarty_mod_count_characters($string,$include_spaces=false) {
+    
+    if($include_spaces)
+       return(strlen($string));
+            
+    return preg_match_all("/[^\s]/",$string,$match);
+}
+
+/*======================================================================*\
+    Function: smarty_mod_count_words
+    Purpose:  count the number of words in a text
+\*======================================================================*/
+function smarty_mod_count_words($string) {
+    
+    // split text by ' ',\r,\n,\f,\t
+    $split_array = preg_split("/\s+/",$string);
+    // count matches that contain alphanumerics
+    $word_count = preg_grep("/[a-zA-Z0-9]/",$split_array);
+    
+    return count($word_count);
+}
+
+/*======================================================================*\
+    Function: smarty_mod_count_sentences
+    Purpose:  count the number of sentences in a text
+\*======================================================================*/
+function smarty_mod_count_sentences($string,$include_spaces=false) {
+    
+    // find periods with a word before but not after.    
+    return preg_match_all("/[^\s]\.(?!\w)/",$string,$match);
+    
+}
+
+/*======================================================================*\
+    Function: smarty_mod_count_paragraphs
+    Purpose:  count the number of sentences in a text
+\*======================================================================*/
+function smarty_mod_count_paragraphs($string,$include_spaces=false) {
+    
+    // count \r or \n characters
+    return count( preg_split("/[\r\n]+/",$string) );
+}
+
 /* vim: set expandtab: */
 
 ?>

Smarty.class.php

@@ -100,7 +100,11 @@ class Smarty
                                     'string_format' => 'smarty_mod_string_format',
                                     'replace'       => 'smarty_mod_replace',
                                     'strip_tags'    => 'smarty_mod_strip_tags',
-                                    'default'       => 'smarty_mod_default'
+                                    'default'       => 'smarty_mod_default',
+                                    'count_characters' => 'smarty_mod_count_characters',
+                                    'count_words'   => 'smarty_mod_count_words',
+                                    'count_sentences' => 'smarty_mod_count_sentences',
+                                    'count_paragraphs' => 'smarty_mod_count_paragraphs'
                                  );
 
     // internal vars

Smarty_Compiler.class.php

@@ -463,7 +463,7 @@ class Smarty_Compiler extends Smarty {
             $this->_syntax_error("missing section name");
         }
 
-        $output .= "unset(\$_sections[$section_name]);\n";
+        $output .= "if(isset(\$_sections[$section_name])) { unset(\$_sections[$section_name]); }\n";
         $section_props = "\$_sections[$section_name]['properties']";
 
         foreach ($attrs as $attr_name => $attr_value) {

docs.sgml

@@ -2356,6 +2356,15 @@ OUTPUT:
 
 6
 
+
+{* you can supply a format paramter in sprintf format *}
+
+{math equation="x + y" x=4.4444 y=5.0000 format="%.2f"}
+
+OUTPUT:
+
+9.44
+
 </programlisting>
 </example>
 		</sect2>

libs/Smarty.class.php

@@ -100,7 +100,11 @@ class Smarty
                                     'string_format' => 'smarty_mod_string_format',
                                     'replace'       => 'smarty_mod_replace',
                                     'strip_tags'    => 'smarty_mod_strip_tags',
-                                    'default'       => 'smarty_mod_default'
+                                    'default'       => 'smarty_mod_default',
+                                    'count_characters' => 'smarty_mod_count_characters',
+                                    'count_words'   => 'smarty_mod_count_words',
+                                    'count_sentences' => 'smarty_mod_count_sentences',
+                                    'count_paragraphs' => 'smarty_mod_count_paragraphs'
                                  );
 
     // internal vars

libs/Smarty_Compiler.class.php

@@ -463,7 +463,7 @@ class Smarty_Compiler extends Smarty {
             $this->_syntax_error("missing section name");
         }
 
-        $output .= "unset(\$_sections[$section_name]);\n";
+        $output .= "if(isset(\$_sections[$section_name])) { unset(\$_sections[$section_name]); }\n";
         $section_props = "\$_sections[$section_name]['properties']";
 
         foreach ($attrs as $attr_name => $attr_value) {