harfbuzz/util/output-options.hh

118 lines
3.3 KiB
C++

/*
* 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