Copie figée du cœur de GNU Backgammon (commit 14b6798)

Fichiers repris sans modification dans engine/gnubg/, poids et table
d'équité Kazaross-XG2 dans engine/data/, provenance détaillée dans
engine/gnubg/PROVENANCE.md. Le lint ne vérifie plus les espaces de ces
copies, pour qu'elles restent identiques à l'original.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

engine/gnubg/common.h

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2006-2009 Jon Kinsey <jonkinsey@gmail.com>
+ * Copyright (C) 2006-2017 the AUTHORS
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*! \file common.h
+ * \brief Odd definitions
+ */
+
+#ifndef COMMON_H
+#define COMMON_H
+#include <math.h>
+#include "config.h"
+
+
+#ifndef HAVE___ATTRIBUTE__
+#define __attribute__(Spec) /* Empty */
+#endif /* HAVE___ATTRIBUTE__ */
+
+#define F_PI (float)G_PI
+#define F_PI_2 (float)G_PI_2
+
+/*! \brief Safe error value
+ */
+#define ERR_VAL (-FLT_MAX)
+
+/*! \brief Macro to extract sign
+ */
+#ifndef SGN
+#define SGN(x) ((x) > 0 ? 1 : -1)
+#endif
+
+/*! \brief typedef of signal handler function
+ */
+#if HAVE_SIGACTION
+typedef struct sigaction psighandler;
+#elif HAVE_SIGVEC
+typedef struct sigvec psighandler;
+#else
+typedef void (*psighandler) (int);
+#endif
+
+/* abs returns unsigned int by definition */
+#define Abs(a) ((unsigned int)abs(a))
+
+/* Do we need to use g_utf8_casefold() for utf8 anywhere? */
+#define StrCaseCmp(s1, s2) g_ascii_strcasecmp(s1, s2)
+#define StrNCaseCmp(s1, s2, n) g_ascii_strncasecmp(s1, s2, (gsize)n)
+/* if the following are defined as macros undefine them */
+#ifdef strcasecmp
+#undef strcasecmp
+#endif
+#ifdef strncasecmp
+#undef strncasecmp
+#endif
+/* Avoid new code using strcase functions */
+#define strcasecmp strcasecmp_error_use_StrCaseCmp
+#define strncasecmp strncasecmp_error_use_StrNCaseCmp
+
+
+/* Macro to mark parameters that aren't used in the function */
+#ifdef UNUSED
+#elif defined(HAVE_FUNC_ATTRIBUTE_UNUSED)
+#define UNUSED(x) UNUSED_ ## x __attribute__((unused))
+#elif defined(_lint)
+#define UNUSED(x) /*lint -e{715, 818}*/ _unused_##x
+#else
+#define UNUSED(x) _unused_##x
+#endif
+
+/* Helper macros for __builtin_expect */
+#ifdef HAVE___BUILTIN_EXPECT
+#define likely(expression)	__builtin_expect(!!(expression), 1)
+#define unlikely(expression)	__builtin_expect(!!(expression), 0)
+#else
+#define likely(expression)	(expression)
+#define unlikely(expression)	(expression)
+#endif
+
+#endif