286 lines
7.0 KiB
C++
286 lines
7.0 KiB
C++
/*
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* Copyright © 2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef OPTIONS_HH
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#define OPTIONS_HH
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#include "hb.hh"
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include <math.h>
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#include <locale.h>
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#include <errno.h>
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#include <fcntl.h>
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#if defined(_WIN32) || defined(__CYGWIN__)
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#include <io.h> /* for setmode() under Windows */
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h> /* for isatty() */
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#endif
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#include <hb.h>
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#include <hb-ot.h>
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#include <glib.h>
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#include <glib/gprintf.h>
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static inline void fail (hb_bool_t suggest_help, const char *format, ...) G_GNUC_NORETURN G_GNUC_PRINTF (2, 3);
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static inline void
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fail (hb_bool_t suggest_help, const char *format, ...)
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{
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const char *msg;
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va_list vap;
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va_start (vap, format);
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msg = g_strdup_vprintf (format, vap);
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va_end (vap);
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const char *prgname = g_get_prgname ();
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g_printerr ("%s: %s\n", prgname, msg);
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if (suggest_help)
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g_printerr ("Try `%s --help' for more information.\n", prgname);
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exit (1);
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}
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struct option_parser_t
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{
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option_parser_t (const char *parameter_string = nullptr)
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: context (g_option_context_new (parameter_string)),
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to_free (g_ptr_array_new ())
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{}
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static void _g_free_g_func (void *p, void * G_GNUC_UNUSED) { g_free (p); }
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~option_parser_t ()
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{
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g_option_context_free (context);
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g_ptr_array_foreach (to_free, _g_free_g_func, nullptr);
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g_ptr_array_free (to_free, TRUE);
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}
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void add_options ();
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static void
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post_parse_ (void *thiz, GError **error) {}
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template <typename Type>
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static auto
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post_parse_ (Type *thiz, GError **error) -> decltype (thiz->post_parse (error))
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{ thiz->post_parse (error); }
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template <typename Type>
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static gboolean
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post_parse (GOptionContext *context G_GNUC_UNUSED,
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GOptionGroup *group G_GNUC_UNUSED,
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gpointer data,
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GError **error)
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{
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option_parser_t::post_parse_ (static_cast<Type *> (data), error);
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return !*error;
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}
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template <typename Type>
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void add_group (GOptionEntry *entries,
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const gchar *name,
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const gchar *description,
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const gchar *help_description,
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Type *closure,
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bool add_parse_hooks = true)
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{
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GOptionGroup *group = g_option_group_new (name, description, help_description,
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static_cast<gpointer>(closure), nullptr);
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g_option_group_add_entries (group, entries);
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if (add_parse_hooks)
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g_option_group_set_parse_hooks (group, nullptr, post_parse<Type>);
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g_option_context_add_group (context, group);
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}
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template <typename Type>
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void add_main_group (GOptionEntry *entries,
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Type *closure)
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{
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GOptionGroup *group = g_option_group_new (nullptr, nullptr, nullptr,
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static_cast<gpointer>(closure), nullptr);
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g_option_group_add_entries (group, entries);
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/* https://gitlab.gnome.org/GNOME/glib/-/issues/2460 */
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//g_option_group_set_parse_hooks (group, nullptr, post_parse<Type>);
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g_option_context_set_main_group (context, group);
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}
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void set_summary (const char *summary)
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{
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g_option_context_set_summary (context, summary);
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}
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void set_description (const char *description)
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{
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g_option_context_set_description (context, description);
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}
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void free_later (char *p) {
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g_ptr_array_add (to_free, p);
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}
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bool parse (int *argc, char ***argv, bool ignore_error = false);
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GOptionContext *context;
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protected:
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GPtrArray *to_free;
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};
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static inline gchar *
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shapers_to_string ()
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{
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GString *shapers = g_string_new (nullptr);
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const char **shaper_list = hb_shape_list_shapers ();
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for (; *shaper_list; shaper_list++) {
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g_string_append (shapers, *shaper_list);
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g_string_append_c (shapers, ',');
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}
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g_string_truncate (shapers, MAX (0, (gint)shapers->len - 1));
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return g_string_free (shapers, false);
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}
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static G_GNUC_NORETURN gboolean
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show_version (const char *name G_GNUC_UNUSED,
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const char *arg G_GNUC_UNUSED,
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gpointer data G_GNUC_UNUSED,
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GError **error G_GNUC_UNUSED)
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{
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g_printf ("%s (%s) %s\n", g_get_prgname (), PACKAGE_NAME, PACKAGE_VERSION);
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char *shapers = shapers_to_string ();
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g_printf ("Available shapers: %s\n", shapers);
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g_free (shapers);
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if (strcmp (HB_VERSION_STRING, hb_version_string ()))
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g_printf ("Linked HarfBuzz library has a different version: %s\n", hb_version_string ());
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exit(0);
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}
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inline void
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option_parser_t::add_options ()
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{
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GOptionEntry entries[] =
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{
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{"version", 0, G_OPTION_FLAG_NO_ARG,
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G_OPTION_ARG_CALLBACK, (gpointer) &show_version, "Show version numbers", nullptr},
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{nullptr}
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};
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g_option_context_add_main_entries (context, entries, nullptr);
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}
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inline bool
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option_parser_t::parse (int *argc, char ***argv, bool ignore_error)
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{
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setlocale (LC_ALL, "");
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GError *parse_error = nullptr;
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if (!g_option_context_parse (context, argc, argv, &parse_error))
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{
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if (parse_error)
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{
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if (!ignore_error)
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fail (true, "%s", parse_error->message);
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g_error_free (parse_error);
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}
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else
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{
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if (!ignore_error)
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fail (true, "Option parse error");
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}
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return false;
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}
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return true;
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}
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/* fallback implementation for scalbn()/scalbnf() for pre-2013 MSVC */
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#if defined (_MSC_VER) && (_MSC_VER < 1800)
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#ifndef FLT_RADIX
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#define FLT_RADIX 2
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#endif
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__inline long double scalbn (long double x, int exp)
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{
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return x * (pow ((long double) FLT_RADIX, exp));
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}
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__inline float scalbnf (float x, int exp)
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{
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return x * (pow ((float) FLT_RADIX, exp));
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}
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#endif
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static inline bool
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parse_color (const char *s,
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unsigned &r,
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unsigned &g,
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unsigned &b,
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unsigned &a)
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{
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bool ret = false;
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while (*s == ' ') s++;
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if (*s == '#') s++;
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unsigned sr, sg, sb, sa;
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sa = 255;
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if (sscanf (s, "%2x%2x%2x%2x", &sr, &sg, &sb, &sa) <= 2)
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{
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if (sscanf (s, "%1x%1x%1x%1x", &sr, &sg, &sb, &sa) >= 3)
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{
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sr *= 17;
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sg *= 17;
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sb *= 17;
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sa *= 17;
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ret = true;
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}
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}
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else
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ret = true;
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if (ret)
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{
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r = sr;
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g = sg;
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b = sb;
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a = sa;
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}
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return ret;
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}
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#endif
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