1 files changed, 57 insertions, 0 deletions
diff --git a/lang.h b/lang.h
new file mode 100644
index 000000000000..cf7b47137673
--- /dev/null
+++ b/lang.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 1984-2024  Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+#ifndef LESS_LANG_H_
+#define LESS_LANG_H_ 1
+
+/*
+ * C language details.
+ */
+#if HAVE_CONST
+#define constant        const
+#else
+#define constant
+#endif
+
+/*
+ * mutable is the opposite of constant.
+ * It documents that a pointer parameter will be written through by the
+ * called function, more directly than by the mere absence of "constant".
+ */
+#define mutable
+
+#define public          /* PUBLIC FUNCTION */
+
+#undef  ptr_diff
+#define ptr_diff(p1,p2)  ((size_t) ((p1)-(p2)))
+#undef  countof
+#define countof(a)       ((int)(sizeof(a)/sizeof(*a)))
+
+#define size_t_null      ((size_t)-1)
+
+#ifndef NULL
+#define NULL    0
+#endif
+
+typedef enum lbool { LFALSE, LTRUE } lbool;
+
+#undef  TRUE
+#define TRUE  LTRUE
+#undef  FALSE
+#define FALSE LFALSE
+
+#ifdef _MSC_VER
+#if _WIN64
+typedef __int64 ssize_t;
+#else
+typedef __int32 ssize_t;
+#endif
+#endif
+
+#endif //  LESS_LANG_H_