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<doc>
   <title>Parsing</title>

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   <body>
      <br/><br/>

      <p>
      This page documents the objects and functions that in some way deal with parsing or otherwise 
      manipulating text.  
      Everything here follows the same conventions as the rest of the library.
      </p>


   
   </body>

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   <menu width="150">
    <top>
      <section>
         <name>Objects</name>
         <item>cmd_line_parser</item> 
         <item>config_reader</item> 
         <item>cpp_pretty_printer</item> 
         <item>cpp_tokenizer</item> 
         <item>tokenizer</item> 
         <item>xml_parser</item> 
         <item>base64</item>
         <item>unichar</item>
         <item>ustring</item>
         <item>basic_utf8_ifstream</item>
      
      </section>

      <section>
         <name>Global Functions</name>
         <item>string_cast</item>
         <item>string_assign</item>
         <item>cast_to_string</item>
         <item>pad_int_with_zeros</item>
         <item>cast_to_wstring</item>
         <item>wrap_string</item>
         <item>narrow</item> 
         <item>trim</item> 
         <item>ltrim</item> 
         <item>rtrim</item> 
         <item>pad</item> 
         <item>lpad</item> 
         <item>rpad</item> 
         <item>left_substr</item> 
         <item>right_substr</item> 
         <item>split</item> 
         <item>tolower</item> 
         <item>toupper</item> 
         <item>convert_utf8_to_utf32</item> 
         <item>is_combining_char</item> 
         <item>strings_equal_ignore_case</item> 
      </section>
    </top>
   </menu>

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   <components>
   
            
            
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      <component>
         <name>toupper</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to convert a string to all uppercase.
         </description>
                                 
      </component>
            
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      <component>
         <name>tolower</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to convert a string to all lowercase.
         </description>
                                 
      </component>
            
            
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      <component>
         <name>split</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
             Breaks a string into a sequence of substrings delimited
             by a user specified set of characters.   
         </description>
                                 
      </component>
            
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      <component>
         <name>right_substr</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to return the part of a string to the right of a user supplied delimiter.
         </description>
                                 
      </component>
            
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      <component>
         <name>left_substr</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to return the part of a string to the left of a user supplied delimiter.
         </description>
                                 
      </component>
            
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      <component>
         <name>rpad</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to pad whitespace (or user specified characters) onto the right most end of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>lpad</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to pad whitespace (or user specified characters) onto the left most end of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>pad</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to pad whitespace (or user specified characters) onto the ends of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>rtrim</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to remove the whitespace (or user specified characters) from the right most end of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>ltrim</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to remove the whitespace (or user specified characters) from the left most end of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>trim</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function to remove the whitespace (or user specified characters) from the ends of a string.
         </description>
                                 
      </component>
            
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      <component>
         <name>narrow</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>
            This is a function for converting a string of type std::string or std::wstring 
    to a plain std::string. 
         </description>
                                 
      </component>
            
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      <component>
         <name>wrap_string</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            wrap_string is a function that takes a string and breaks it into a number of
            lines of a given length.  You can use this to make a string
            fit nicely into a command prompt window for example.
         </description>
                                 
      </component>
            
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      <component>
         <name>strings_equal_ignore_case</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            This is a pair of functions to do a case insensitive comparison between strings.
         </description>
                                 
      </component>
            
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      <component>
         <name>cast_to_wstring</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            cast_to_string is a templated function which makes it easy to convert arbitrary objects to 
            std::wstring strings.  The types supported are any types that can be written to std::wostream via 
            operator&lt;&lt;.
         </description>
                                 
      </component>
            
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      <component>
         <name>cast_to_string</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            cast_to_string is a templated function which makes it easy to convert arbitrary objects to 
            std::string strings.  The types supported are any types that can be written to std::ostream via 
            operator&lt;&lt;.
         </description>
                                 
      </component>
            
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      <component>
         <name>pad_int_with_zeros</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            Converts an integer into a string and pads it with leading zeros.
         </description>
                                 
      </component>
            
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      <component>
         <name>string_cast</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            string_cast is a templated function which makes it easy to convert strings to 
            other types.  The types supported are any types that can be read by the basic_istream operator>>.  It
            also supports casting between wstring, string, and ustring objects.
         </description>
      </component>
      
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      <component>
         <name>string_assign</name>
         <file>dlib/string.h</file>
         <spec_file link="true">dlib/string/string_abstract.h</spec_file>
         <description>        
            string_assign is an object which makes it easy to convert strings to 
            other types.  The types supported are any types that can be read by the basic_istream operator>>.  It
            also supports casting between wstring, string, and ustring objects.  Since
            string_assign is a simple stateless object there is a global instance of it
            called dlib::sa.  
         </description>
         <examples>
            <example>config_reader_ex.cpp.html</example>
         </examples>
                                 
      </component>
      
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      <component>
         <name>unichar</name>
         <file>dlib/unicode.h</file>
         <spec_file link="true">dlib/unicode/unicode_abstract.h</spec_file>
         <description>        
            This is a typedef for an unsigned 32bit integer which we use to store
            Unicode values.
         </description>
                                 
      </component>
            
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      <component>
         <name>basic_utf8_ifstream</name>
         <file>dlib/unicode.h</file>
         <spec_file link="true">dlib/unicode/unicode_abstract.h</spec_file>
         <description>        
                This object represents an input file stream much like the
                normal std::ifstream except that it knows how to read UTF-8 
                data.  So when you read characters out of this stream it will
                automatically convert them from the UTF-8 multibyte encoding
                into a fixed width wide character encoding.
                
               <p>
                  There are also two typedefs of this object.  The first is utf8_wifstream which is a
                  typedef for wchar_t as the wide character to read into.  The second is utf8_uifstream 
                  which uses unichar instead of wchar_t.
               </p>
         </description>
                                 
      </component>
            
      
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      <component>
         <name>ustring</name>
         <file>dlib/unicode.h</file>
         <spec_file link="true">dlib/unicode/unicode_abstract.h</spec_file>
         <description>        
            This is a typedef for a std::basic_string&lt;unichar&gt;.  That is, it is a typedef
            for a string object that stores unichar Unicode characters. 
         </description>
                                 
      </component>
      
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      <component>
         <name>is_combining_char</name>
         <file>dlib/unicode.h</file>
         <spec_file link="true">dlib/unicode/unicode_abstract.h</spec_file>
         <description>        
            This is a global function that can tell you if a character is a Unicode 
            combining character or not.
         </description>
                                 
      </component>
      
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      <component>
         <name>convert_utf8_to_utf32</name>
         <file>dlib/unicode.h</file>
         <spec_file link="true">dlib/unicode/unicode_abstract.h</spec_file>
         <description>        
            This is a global function that can convert UTF-8 strings into strings
            of 32bit unichar characters. 
         </description>
                                 
      </component>
            
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      <component>
         <name>base64</name>
         <file>dlib/base64.h</file>
         <spec_file>dlib/base64/base64_kernel_abstract.h</spec_file>
         <description>
                This object allows you to encode and decode data to and from
                the Base64 Content-Transfer-Encoding defined in section 6.8 of
                rfc2045.
         </description>

         <examples>
            <example>file_to_code_ex.cpp.html</example>
         </examples>
      </component>
      
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      <component checked="true">
         <name>cmd_line_parser</name>
         <file>dlib/cmd_line_parser.h</file>
         <spec_file>dlib/cmd_line_parser/cmd_line_parser_kernel_abstract.h</spec_file>
         <description>
            This object allows you to easily parse a command line.      Note that the
            documentation for the <a href="dlib/interfaces/cmd_line_parser_option.h.html">cmd_line_parser_option</a>
            (the object returned by the parser's .option() function) is in a separate file.
            <p>
               Note also that there are standard typedefs for the ASCII and wide character versions of the
               cmd_line_parser template.  These are the <tt>command_line_parser</tt> and <tt>wcommand_line_parser</tt>
               types respectively.
            </p>
         </description>
         
         <examples>
            <example>compress_stream_ex.cpp.html</example>
            <example>train_object_detector.cpp.html</example>
         </examples>

         <extensions>
            <extension>
               <name>get_option</name>
               <spec_file>dlib/cmd_line_parser/get_option_abstract.h</spec_file>
               <description>This extension provides a convenience function for accessing the 
                  options to a command line argument or a <a href="#config_reader">config_reader</a>.  It 
                  is automatically #included when using the command line parser or config reader.
                  </description>
            </extension>
         </extensions>              
                                    
                        
      </component>
      
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      <component>
         <name>config_reader</name>
         <file>dlib/config_reader.h</file>
         <spec_file>dlib/config_reader/config_reader_kernel_abstract.h</spec_file>
         <description>
            This object represents something which is intended to be used to read
                         text configuration files.
         </description>

         <examples>
            <example>config_reader_ex.cpp.html</example>
         </examples>
         
         <extensions>
            <extension>
               <name>config_reader_thread_safe</name>
               <spec_file>dlib/config_reader/config_reader_thread_safe_abstract.h</spec_file>
               <description>
                This object extends a normal config_reader by simply wrapping all 
                its member functions inside mutex locks to make it safe to use
                in a threaded program.  
               </description>
            </extension>
         </extensions>
         
               
      </component>
      
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      <component>
         <name>cpp_pretty_printer</name>
         <file>dlib/cpp_pretty_printer.h</file>
         <spec_file>dlib/cpp_pretty_printer/cpp_pretty_printer_kernel_abstract.h</spec_file>
         <description>
            This object represents an HTML pretty printer for C++ source code.
         </description>
         
         <implementations>
            <implementation>
               <name>cpp_pretty_printer_kernel_1</name>
               <file>dlib/cpp_pretty_printer/cpp_pretty_printer_kernel_1.h</file>
               <description> 
                  This is implemented by using the <a href="#cpp_tokenizer">cpp_tokenizer</a> object.  
                  This is the pretty printer I use on all the source in this library.  It applies a color scheme, turns
                  include directives such as #include "file.h" into links to file.h.html and puts HTML anchor points
                  on function and class declarations.  It also looks for comments starting with /*!A and puts an anchor
                  before the comment using the word following the A as the name of the anchor.
               </description> 
    
               <typedefs>
                  <typedef>
                     <name>kernel_1a</name>
                     <description>is a typedef for cpp_pretty_printer_kernel_1</description>
                  </typedef>
               </typedefs>                
               
            </implementation> 
            <implementation>
               <name>cpp_pretty_printer_kernel_2</name>
               <file>dlib/cpp_pretty_printer/cpp_pretty_printer_kernel_2.h</file>
               <description> 
                  This is implemented by using the <a href="#cpp_tokenizer">cpp_tokenizer</a> object.  
                  It applies a black and white color scheme suitable 
                  for printing on a black and white printer.  It also places the document title 
                  prominently at the top of the pretty printed source file.
               </description> 
    
               <typedefs>
                  <typedef>
                     <name>kernel_2a</name>
                     <description>is a typedef for cpp_pretty_printer_kernel_2</description>
                  </typedef>
               </typedefs>                
               
            </implementation> 
                     
         </implementations>
                        
      </component>
            
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      <component checked="true">
         <name>cpp_tokenizer</name>
         <file>dlib/cpp_tokenizer.h</file>
         <spec_file>dlib/cpp_tokenizer/cpp_tokenizer_kernel_abstract.h</spec_file>
         <description>
                This object represents a simple tokenizer for C++ source code. 
         </description>
         
         <implementations>
            <implementation>
               <name>cpp_tokenizer_kernel_1</name>
               <file>dlib/cpp_tokenizer/cpp_tokenizer_kernel_1.h</file>
               <description> 
                  This is implemented by using the <a href="#tokenizer">tokenizer</a> object in the obvious way. 
               </description> 
    
               <typedefs>
                  <typedef>
                     <name>kernel_1a</name>
                     <description>is a typedef for cpp_tokenizer_kernel_1</description>
                  </typedef>
               </typedefs>                
               
            </implementation> 
                     
         </implementations>
                        
      </component>
            
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      <component checked="true">
         <name>tokenizer</name>
         <file>dlib/tokenizer.h</file>
         <spec_file>dlib/tokenizer/tokenizer_kernel_abstract.h</spec_file>
         <description>
            This object represents a simple tokenizer for textual data.
         </description>
         
         <implementations>
            <implementation>
               <name>tokenizer_kernel_1</name>
               <file>dlib/tokenizer/tokenizer_kernel_1.h</file>
               <description> 
                  This is implemented in the obvious way. 
               </description> 
    
               <typedefs>
                  <typedef>
                     <name>kernel_1a</name>
                     <description>is a typedef for tokenizer_kernel_1</description>
                  </typedef>
               </typedefs>                
               
            </implementation> 
                     
         </implementations>
                        
      </component>
            
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      <component checked="true">
         <name>xml_parser</name>
         <file>dlib/xml_parser.h</file>
         <spec_file>dlib/xml_parser/xml_parser_kernel_abstract.h</spec_file>
         <description>
            
                This object represents a simple SAX style event driven XML parser.  
                It takes its input from an input stream object and sends events to all 
                registered document_handler and error_handler objects.
            <br/><br/>
            
            The xml_parser object also uses the interface classes 
            <a href="dlib/xml_parser/xml_parser_kernel_interfaces.h.html#document_handler">document_handler</a>
            and 
            <a href="dlib/xml_parser/xml_parser_kernel_interfaces.h.html#error_handler">error_handler</a>.
            Subclasses of these classes are passed to the xml_parser which generates events while it's
            parsing and sends them to the appropriate handler.
            
         </description>

         <examples>
            <example>xml_parser_ex.cpp.html</example>
         </examples>
         
         <implementations>
            <implementation>
               <name>xml_parser_kernel_1</name>
               <file>dlib/xml_parser/xml_parser_kernel_1.h</file>
               <description> 
                  This implementation is done using a <a href="containers.html#stack">stack</a> (as opposed to recursive descent) to parse
                  xml documents.  It also uses a <a href="containers.html#map">map</a> to implement the attribute_list interface and 
                  internally uses the <a href="containers.html#sequence">sequence</a> object to keep track of all registered document and error
                  handlers.
               </description> 
    
               <typedefs>
                  <typedef>
                     <name>kernel_1a</name>
                     <description>is a typedef for xml_parser_kernel_1 that uses map_kernel_1a, stack_kernel_1a, and sequence_kernel_2a</description>
                  </typedef>
               </typedefs>                
               
            </implementation> 
                     
         </implementations>
                        
      </component>
            
      
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   </components>

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</doc>
