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+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * macros.h: macro definitions for often used code
+ */
+
+/*
+ * pchar(lp, c) - put character 'c' at position 'lp'
+ */
+#define pchar(lp, c) (*(ml_get_buf(curbuf, (lp).lnum, TRUE) + (lp).col) = (c))
+
+/*
+ * Position comparisons
+ */
+#ifdef FEAT_VIRTUALEDIT
+# define lt(a, b) (((a).lnum != (b).lnum) \
+		   ? (a).lnum < (b).lnum \
+		   : (a).col != (b).col \
+		       ? (a).col < (b).col \
+		       : (a).coladd < (b).coladd)
+# define ltp(a, b) (((a)->lnum != (b)->lnum) \
+		   ? (a)->lnum < (b)->lnum \
+		   : (a)->col != (b)->col \
+		       ? (a)->col < (b)->col \
+		       : (a)->coladd < (b)->coladd)
+# define equalpos(a, b) (((a).lnum == (b).lnum) && ((a).col == (b).col) && ((a).coladd == (b).coladd))
+#else
+# define lt(a, b) (((a).lnum != (b).lnum) \
+		   ? ((a).lnum < (b).lnum) : ((a).col < (b).col))
+# define ltp(a, b) (((a)->lnum != (b)->lnum) \
+		   ? ((a)->lnum < (b)->lnum) : ((a)->col < (b)->col))
+# define equalpos(a, b) (((a).lnum == (b).lnum) && ((a).col == (b).col))
+#endif
+
+#define ltoreq(a, b) (lt(a, b) || equalpos(a, b))
+
+/*
+ * lineempty() - return TRUE if the line is empty
+ */
+#define lineempty(p) (*ml_get(p) == NUL)
+
+/*
+ * bufempty() - return TRUE if the current buffer is empty
+ */
+#define bufempty() (curbuf->b_ml.ml_line_count == 1 && *ml_get((linenr_T)1) == NUL)
+
+/*
+ * toupper() and tolower() that use the current locale.
+ * On some systems toupper()/tolower() only work on lower/uppercase characters
+ * Careful: Only call TOUPPER_LOC() and TOLOWER_LOC() with a character in the
+ * range 0 - 255.  toupper()/tolower() on some systems can't handle others.
+ * Note: for UTF-8 use utf_toupper() and utf_tolower().
+ */
+#ifdef MSWIN
+#  define TOUPPER_LOC(c)	toupper_tab[(c) & 255]
+#  define TOLOWER_LOC(c)	tolower_tab[(c) & 255]
+#else
+# ifdef BROKEN_TOUPPER
+#  define TOUPPER_LOC(c)	(islower(c) ? toupper(c) : (c))
+#  define TOLOWER_LOC(c)	(isupper(c) ? tolower(c) : (c))
+# else
+#  define TOUPPER_LOC		toupper
+#  define TOLOWER_LOC		tolower
+# endif
+#endif
+
+/* toupper() and tolower() for ASCII only and ignore the current locale. */
+#ifdef EBCDIC
+# define TOUPPER_ASC(c)	(islower(c) ? toupper(c) : (c))
+# define TOLOWER_ASC(c)	(isupper(c) ? tolower(c) : (c))
+#else
+# define TOUPPER_ASC(c)	(((c) < 'a' || (c) > 'z') ? (c) : (c) - ('a' - 'A'))
+# define TOLOWER_ASC(c)	(((c) < 'A' || (c) > 'Z') ? (c) : (c) + ('a' - 'A'))
+#endif
+
+/*
+ * MB_ISLOWER() and MB_ISUPPER() are to be used on multi-byte characters.  But
+ * don't use them for negative values.
+ */
+#ifdef FEAT_MBYTE
+# define MB_ISLOWER(c)	(enc_utf8 && (c) > 0x80 ? utf_islower(c) : (has_mbyte && c > 255 ? FALSE : islower(c)))
+# define MB_ISUPPER(c)	(enc_utf8 && (c) > 0x80 ? utf_isupper(c) : (has_mbyte && c > 255 ? FALSE : isupper(c)))
+# define MB_TOLOWER(c)	(enc_utf8 && (c) > 0x80 ? utf_tolower(c) : (has_mbyte && c > 255 ? c : TOLOWER_LOC(c)))
+# define MB_TOUPPER(c)	(enc_utf8 && (c) > 0x80 ? utf_toupper(c) : (has_mbyte && c > 255 ? c : TOUPPER_LOC(c)))
+#else
+# define MB_ISLOWER(c)	islower(c)
+# define MB_ISUPPER(c)	isupper(c)
+# define MB_TOLOWER(c)	TOLOWER_LOC(c)
+# define MB_TOUPPER(c)	TOUPPER_LOC(c)
+#endif
+
+/* Like isalpha() but reject non-ASCII characters.  Can't be used with a
+ * special key (negative value). */
+#ifdef EBCDIC
+# define ASCII_ISALPHA(c) isalpha(c)
+# define ASCII_ISALNUM(c) isalnum(c)
+# define ASCII_ISLOWER(c) islower(c)
+# define ASCII_ISUPPER(c) isupper(c)
+#else
+# define ASCII_ISALPHA(c) ((c) < 0x7f && isalpha(c))
+# define ASCII_ISALNUM(c) ((c) < 0x7f && isalnum(c))
+# define ASCII_ISLOWER(c) ((c) < 0x7f && islower(c))
+# define ASCII_ISUPPER(c) ((c) < 0x7f && isupper(c))
+#endif
+
+/* Use our own isdigit() replacement, because on MS-Windows isdigit() returns
+ * non-zero for superscript 1.  Also avoids that isdigit() crashes for numbers
+ * below 0 and above 255.  For complicated arguments and in/decrement use
+ * vim_isdigit() instead. */
+#define VIM_ISDIGIT(c) ((c) >= '0' && (c) <= '9')
+
+/* macro version of chartab().
+ * Only works with values 0-255!
+ * Doesn't work for UTF-8 mode with chars >= 0x80. */
+#define CHARSIZE(c)	(chartab[c] & CT_CELL_MASK)
+
+#ifdef FEAT_LANGMAP
+/*
+ * Adjust chars in a language according to 'langmap' option.
+ * NOTE that there is NO overhead if 'langmap' is not set; but even
+ * when set we only have to do 2 ifs and an array lookup.
+ * Don't apply 'langmap' if the character comes from the Stuff buffer.
+ * The do-while is just to ignore a ';' after the macro.
+ */
+# define LANGMAP_ADJUST(c, condition) do { \
+	if (*p_langmap && (condition) && !KeyStuffed && (c) >= 0 && (c) < 256) \
+	    c = langmap_mapchar[c]; \
+    } while (0)
+#endif
+
+/*
+ * vim_isbreak() is used very often if 'linebreak' is set, use a macro to make
+ * it work fast.
+ */
+#define vim_isbreak(c) (breakat_flags[(char_u)(c)])
+
+/*
+ * On VMS file names are different and require a translation.
+ * On the Mac open() has only two arguments.
+ */
+#ifdef VMS
+# define mch_access(n, p)	access(vms_fixfilename(n), (p))
+				/* see mch_open() comment */
+# define mch_fopen(n, p)	fopen(vms_fixfilename(n), (p))
+# define mch_fstat(n, p)	fstat(vms_fixfilename(n), (p))
+	/* VMS does not have lstat() */
+# define mch_stat(n, p)		stat(vms_fixfilename(n), (p))
+#else
+# ifndef WIN32
+#   define mch_access(n, p)	access((n), (p))
+# endif
+# if !(defined(FEAT_MBYTE) && defined(WIN3264))
+#  define mch_fopen(n, p)	fopen((n), (p))
+# endif
+# define mch_fstat(n, p)	fstat((n), (p))
+# define mch_lstat(n, p)	lstat((n), (p))
+# ifdef MSWIN	/* has it's own mch_stat() function */
+#  define mch_stat(n, p)	vim_stat((n), (p))
+# else
+#  ifdef STAT_IGNORES_SLASH
+    /* On Solaris stat() accepts "file/" as if it was "file".  Return -1 if
+     * the name ends in "/" and it's not a directory. */
+#   define mch_stat(n, p)	(illegal_slash(n) ? -1 : stat((n), (p)))
+#  else
+#   define mch_stat(n, p)	stat((n), (p))
+#  endif
+# endif
+#endif
+
+#ifdef MACOS_CLASSIC
+/* MacOS classic doesn't support perm but MacOS X does. */
+# define mch_open(n, m, p)	open((n), (m))
+#else
+# ifdef VMS
+/*
+ * It is possible to force some record format with:
+ * #  define mch_open(n, m, p) open(vms_fixfilename(n), (m), (p)), "rat=cr", "rfm=stmlf", "mrs=0")
+ * but it is not recomended, because it can destroy indexes etc.
+ */
+#  define mch_open(n, m, p)	open(vms_fixfilename(n), (m), (p))
+# else
+#  if !(defined(FEAT_MBYTE) && defined(WIN3264))
+#   define mch_open(n, m, p)	open((n), (m), (p))
+#  endif
+# endif
+#endif
+
+/* mch_open_rw(): invoke mch_open() with third argument for user R/W. */
+#if defined(UNIX) || defined(VMS)  /* open in rw------- mode */
+# define mch_open_rw(n, f)	mch_open((n), (f), (mode_t)0600)
+#else
+# if defined(MSDOS) || defined(MSWIN) || defined(OS2)  /* open read/write */
+#  define mch_open_rw(n, f)	mch_open((n), (f), S_IREAD | S_IWRITE)
+# else
+#  define mch_open_rw(n, f)	mch_open((n), (f), 0)
+# endif
+#endif
+
+/*
+ * Encryption macros.  Mohsin Ahmed, mosh@sasi.com 98-09-24
+ * Based on zip/crypt sources.
+ */
+
+#ifdef FEAT_CRYPT
+
+#ifndef __MINGW32__
+# define PWLEN 80
+#endif
+
+/* encode byte c, using temp t.  Warning: c must not have side effects. */
+# define ZENCODE(c, t)  (t = decrypt_byte(), update_keys(c), t^(c))
+
+/* decode byte c in place */
+# define ZDECODE(c)   update_keys(c ^= decrypt_byte())
+
+#endif
+
+#ifdef STARTUPTIME
+# define TIME_MSG(s) time_msg(s, NULL)
+#else
+# define TIME_MSG(s)
+#endif
+
+#ifdef FEAT_VREPLACE
+# define REPLACE_NORMAL(s) (((s) & REPLACE_FLAG) && !((s) & VREPLACE_FLAG))
+#else
+# define REPLACE_NORMAL(s) ((s) & REPLACE_FLAG)
+#endif
+
+#ifdef FEAT_ARABIC
+# define UTF_COMPOSINGLIKE(p1, p2)  utf_composinglike((p1), (p2))
+#else
+# define UTF_COMPOSINGLIKE(p1, p2)  utf_iscomposing(utf_ptr2char(p2))
+#endif
+
+#ifdef FEAT_RIGHTLEFT
+    /* Whether to draw the vertical bar on the right side of the cell. */
+# define CURSOR_BAR_RIGHT (curwin->w_p_rl && (!(State & CMDLINE) || cmdmsg_rl))
+#endif