kc3-lang/harfbuzz/util/output-options.hh

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• Hash : c98773eb
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  Date : 2021-08-11T20:22:03
  

  [util/hb-subset] Move output-file validation code into post_parse
  

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• util/output-options.hh

• /*
   * Copyright © 2011  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Google Author(s): Behdad Esfahbod
   */
  
  #ifndef OUTPUT_OPTIONS_HH
  #define OUTPUT_OPTIONS_HH
  
  #include "options.hh"
  
  template <bool default_stdout = true>
  struct output_options_t
  {
    ~output_options_t ()
    {
      g_free (output_file);
      g_free (output_format);
      if (out_fp && out_fp != stdout)
        fclose (out_fp);
    }
  
    void add_options (option_parser_t *parser,
  		    const char **supported_formats = nullptr)
    {
      const char *text = nullptr;
  
      if (supported_formats)
      {
        char *items = g_strjoinv ("/", const_cast<char **> (supported_formats));
        text = g_strdup_printf ("Set output format\n\n    Supported output formats are: %s", items);
        g_free (items);
        parser->free_later ((char *) text);
      }
  
      GOptionEntry entries[] =
      {
        {"output-file",   'o', 0, G_OPTION_ARG_STRING,	&this->output_file,		"Set output file-name (default: stdout)","filename"},
        {"output-format", 'O', supported_formats ? 0 : G_OPTION_FLAG_HIDDEN,
  				G_OPTION_ARG_STRING,	&this->output_format,		text,					"format"},
        {nullptr}
      };
      parser->add_group (entries,
  		       "output",
  		       "Output destination & format options:",
  		       "Options for the destination & form of the output",
  		       this);
    }
  
    void post_parse (GError **error)
    {
      if (output_format)
        explicit_output_format = true;
  
      if (output_file && !output_format)
      {
        output_format = strrchr (output_file, '.');
        if (output_format)
        {
  	  output_format++; /* skip the dot */
  	  output_format = g_strdup (output_format);
        }
      }
  
      if (output_file && 0 != strcmp (output_file, "-"))
        out_fp = fopen (output_file, "wb");
      else
      {
        if (!default_stdout && !output_file)
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
  		     "No output file was specified");
          return;
        }
  
  #if defined(_WIN32) || defined(__CYGWIN__)
        setmode (fileno (stdout), O_BINARY);
  #endif
        out_fp = stdout;
      }
      if (!out_fp)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
  		   "Cannot open output file `%s': %s",
  		   g_filename_display_name (output_file), strerror (errno));
        return;
      }
    }
  
    char *output_file = nullptr;
    char *output_format = nullptr;
  
    bool explicit_output_format = false;
    FILE *out_fp = nullptr;
  };
  
  #endif
  

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