From 2c4fd0c3c94cd120183bb5e989e36d023ec8c527 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <l.leblansch@gmail.com>
Date: Thu, 16 Jul 2020 12:22:55 +0200
Subject: github repo

---
 st.c.orig | 2598 -------------------------------------------------------------
 1 file changed, 2598 deletions(-)
 delete mode 100644 st.c.orig

(limited to 'st.c.orig')

diff --git a/st.c.orig b/st.c.orig
deleted file mode 100644
index 9b0c329..0000000
--- a/st.c.orig
+++ /dev/null
@@ -1,2598 +0,0 @@
-/* See LICENSE for license details. */
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <pwd.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <sys/select.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <termios.h>
-#include <unistd.h>
-#include <wchar.h>
-
-#include "st.h"
-#include "win.h"
-
-#if   defined(__linux)
- #include <pty.h>
-#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
- #include <util.h>
-#elif defined(__FreeBSD__) || defined(__DragonFly__)
- #include <libutil.h>
-#endif
-
-/* Arbitrary sizes */
-#define UTF_INVALID   0xFFFD
-#define UTF_SIZ       4
-#define ESC_BUF_SIZ   (128*UTF_SIZ)
-#define ESC_ARG_SIZ   16
-#define STR_BUF_SIZ   ESC_BUF_SIZ
-#define STR_ARG_SIZ   ESC_ARG_SIZ
-
-/* macros */
-#define IS_SET(flag)		((term.mode & (flag)) != 0)
-#define ISCONTROLC0(c)		(BETWEEN(c, 0, 0x1f) || (c) == 0x7f)
-#define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
-#define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
-#define ISDELIM(u)		(u && wcschr(worddelimiters, u))
-
-enum term_mode {
-	MODE_WRAP        = 1 << 0,
-	MODE_INSERT      = 1 << 1,
-	MODE_ALTSCREEN   = 1 << 2,
-	MODE_CRLF        = 1 << 3,
-	MODE_ECHO        = 1 << 4,
-	MODE_PRINT       = 1 << 5,
-	MODE_UTF8        = 1 << 6,
-};
-
-enum cursor_movement {
-	CURSOR_SAVE,
-	CURSOR_LOAD
-};
-
-enum cursor_state {
-	CURSOR_DEFAULT  = 0,
-	CURSOR_WRAPNEXT = 1,
-	CURSOR_ORIGIN   = 2
-};
-
-enum charset {
-	CS_GRAPHIC0,
-	CS_GRAPHIC1,
-	CS_UK,
-	CS_USA,
-	CS_MULTI,
-	CS_GER,
-	CS_FIN
-};
-
-enum escape_state {
-	ESC_START      = 1,
-	ESC_CSI        = 2,
-	ESC_STR        = 4,  /* DCS, OSC, PM, APC */
-	ESC_ALTCHARSET = 8,
-	ESC_STR_END    = 16, /* a final string was encountered */
-	ESC_TEST       = 32, /* Enter in test mode */
-	ESC_UTF8       = 64,
-};
-
-typedef struct {
-	Glyph attr; /* current char attributes */
-	int x;
-	int y;
-	char state;
-} TCursor;
-
-typedef struct {
-	int mode;
-	int type;
-	int snap;
-	/*
-	 * Selection variables:
-	 * nb – normalized coordinates of the beginning of the selection
-	 * ne – normalized coordinates of the end of the selection
-	 * ob – original coordinates of the beginning of the selection
-	 * oe – original coordinates of the end of the selection
-	 */
-	struct {
-		int x, y;
-	} nb, ne, ob, oe;
-
-	int alt;
-} Selection;
-
-/* Internal representation of the screen */
-typedef struct {
-	int row;      /* nb row */
-	int col;      /* nb col */
-	Line *line;   /* screen */
-	Line *alt;    /* alternate screen */
-	int *dirty;   /* dirtyness of lines */
-	TCursor c;    /* cursor */
-	int ocx;      /* old cursor col */
-	int ocy;      /* old cursor row */
-	int top;      /* top    scroll limit */
-	int bot;      /* bottom scroll limit */
-	int mode;     /* terminal mode flags */
-	int esc;      /* escape state flags */
-	char trantbl[4]; /* charset table translation */
-	int charset;  /* current charset */
-	int icharset; /* selected charset for sequence */
-	int *tabs;
-	Rune lastc;   /* last printed char outside of sequence, 0 if control */
-} Term;
-
-/* CSI Escape sequence structs */
-/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
-typedef struct {
-	char buf[ESC_BUF_SIZ]; /* raw string */
-	size_t len;            /* raw string length */
-	char priv;
-	int arg[ESC_ARG_SIZ];
-	int narg;              /* nb of args */
-	char mode[2];
-} CSIEscape;
-
-/* STR Escape sequence structs */
-/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
-typedef struct {
-	char type;             /* ESC type ... */
-	char *buf;             /* allocated raw string */
-	size_t siz;            /* allocation size */
-	size_t len;            /* raw string length */
-	char *args[STR_ARG_SIZ];
-	int narg;              /* nb of args */
-} STREscape;
-
-static void execsh(char *, char **);
-static void stty(char **);
-static void sigchld(int);
-static void ttywriteraw(const char *, size_t);
-
-static void csidump(void);
-static void csihandle(void);
-static void csiparse(void);
-static void csireset(void);
-static int eschandle(uchar);
-static void strdump(void);
-static void strhandle(void);
-static void strparse(void);
-static void strreset(void);
-
-static void tprinter(char *, size_t);
-static void tdumpsel(void);
-static void tdumpline(int);
-static void tdump(void);
-static void tclearregion(int, int, int, int);
-static void tcursor(int);
-static void tdeletechar(int);
-static void tdeleteline(int);
-static void tinsertblank(int);
-static void tinsertblankline(int);
-static int tlinelen(int);
-static void tmoveto(int, int);
-static void tmoveato(int, int);
-static void tnewline(int);
-static void tputtab(int);
-static void tputc(Rune);
-static void treset(void);
-static void tscrollup(int, int);
-static void tscrolldown(int, int);
-static void tsetattr(int *, int);
-static void tsetchar(Rune, Glyph *, int, int);
-static void tsetdirt(int, int);
-static void tsetscroll(int, int);
-static void tswapscreen(void);
-static void tsetmode(int, int, int *, int);
-static int twrite(const char *, int, int);
-static void tfulldirt(void);
-static void tcontrolcode(uchar );
-static void tdectest(char );
-static void tdefutf8(char);
-static int32_t tdefcolor(int *, int *, int);
-static void tdeftran(char);
-static void tstrsequence(uchar);
-
-static void drawregion(int, int, int, int);
-
-static void selnormalize(void);
-static void selscroll(int, int);
-static void selsnap(int *, int *, int);
-
-static size_t utf8decode(const char *, Rune *, size_t);
-static Rune utf8decodebyte(char, size_t *);
-static char utf8encodebyte(Rune, size_t);
-static size_t utf8validate(Rune *, size_t);
-
-static char *base64dec(const char *);
-static char base64dec_getc(const char **);
-
-static ssize_t xwrite(int, const char *, size_t);
-
-/* Globals */
-static Term term;
-static Selection sel;
-static CSIEscape csiescseq;
-static STREscape strescseq;
-static int iofd = 1;
-static int cmdfd;
-static pid_t pid;
-
-static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
-static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
-static Rune utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
-static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
-
-ssize_t
-xwrite(int fd, const char *s, size_t len)
-{
-	size_t aux = len;
-	ssize_t r;
-
-	while (len > 0) {
-		r = write(fd, s, len);
-		if (r < 0)
-			return r;
-		len -= r;
-		s += r;
-	}
-
-	return aux;
-}
-
-void *
-xmalloc(size_t len)
-{
-	void *p;
-
-	if (!(p = malloc(len)))
-		die("malloc: %s\n", strerror(errno));
-
-	return p;
-}
-
-void *
-xrealloc(void *p, size_t len)
-{
-	if ((p = realloc(p, len)) == NULL)
-		die("realloc: %s\n", strerror(errno));
-
-	return p;
-}
-
-char *
-xstrdup(char *s)
-{
-	if ((s = strdup(s)) == NULL)
-		die("strdup: %s\n", strerror(errno));
-
-	return s;
-}
-
-size_t
-utf8decode(const char *c, Rune *u, size_t clen)
-{
-	size_t i, j, len, type;
-	Rune udecoded;
-
-	*u = UTF_INVALID;
-	if (!clen)
-		return 0;
-	udecoded = utf8decodebyte(c[0], &len);
-	if (!BETWEEN(len, 1, UTF_SIZ))
-		return 1;
-	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
-		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
-		if (type != 0)
-			return j;
-	}
-	if (j < len)
-		return 0;
-	*u = udecoded;
-	utf8validate(u, len);
-
-	return len;
-}
-
-Rune
-utf8decodebyte(char c, size_t *i)
-{
-	for (*i = 0; *i < LEN(utfmask); ++(*i))
-		if (((uchar)c & utfmask[*i]) == utfbyte[*i])
-			return (uchar)c & ~utfmask[*i];
-
-	return 0;
-}
-
-size_t
-utf8encode(Rune u, char *c)
-{
-	size_t len, i;
-
-	len = utf8validate(&u, 0);
-	if (len > UTF_SIZ)
-		return 0;
-
-	for (i = len - 1; i != 0; --i) {
-		c[i] = utf8encodebyte(u, 0);
-		u >>= 6;
-	}
-	c[0] = utf8encodebyte(u, len);
-
-	return len;
-}
-
-char
-utf8encodebyte(Rune u, size_t i)
-{
-	return utfbyte[i] | (u & ~utfmask[i]);
-}
-
-size_t
-utf8validate(Rune *u, size_t i)
-{
-	if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
-		*u = UTF_INVALID;
-	for (i = 1; *u > utfmax[i]; ++i)
-		;
-
-	return i;
-}
-
-static const char base64_digits[] = {
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0,
-	63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, -1, 0, 0, 0, 0, 1,
-	2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
-	22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34,
-	35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-char
-base64dec_getc(const char **src)
-{
-	while (**src && !isprint(**src))
-		(*src)++;
-	return **src ? *((*src)++) : '=';  /* emulate padding if string ends */
-}
-
-char *
-base64dec(const char *src)
-{
-	size_t in_len = strlen(src);
-	char *result, *dst;
-
-	if (in_len % 4)
-		in_len += 4 - (in_len % 4);
-	result = dst = xmalloc(in_len / 4 * 3 + 1);
-	while (*src) {
-		int a = base64_digits[(unsigned char) base64dec_getc(&src)];
-		int b = base64_digits[(unsigned char) base64dec_getc(&src)];
-		int c = base64_digits[(unsigned char) base64dec_getc(&src)];
-		int d = base64_digits[(unsigned char) base64dec_getc(&src)];
-
-		/* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */
-		if (a == -1 || b == -1)
-			break;
-
-		*dst++ = (a << 2) | ((b & 0x30) >> 4);
-		if (c == -1)
-			break;
-		*dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
-		if (d == -1)
-			break;
-		*dst++ = ((c & 0x03) << 6) | d;
-	}
-	*dst = '\0';
-	return result;
-}
-
-void
-selinit(void)
-{
-	sel.mode = SEL_IDLE;
-	sel.snap = 0;
-	sel.ob.x = -1;
-}
-
-int
-tlinelen(int y)
-{
-	int i = term.col;
-
-	if (term.line[y][i - 1].mode & ATTR_WRAP)
-		return i;
-
-	while (i > 0 && term.line[y][i - 1].u == ' ')
-		--i;
-
-	return i;
-}
-
-void
-selstart(int col, int row, int snap)
-{
-	selclear();
-	sel.mode = SEL_EMPTY;
-	sel.type = SEL_REGULAR;
-	sel.alt = IS_SET(MODE_ALTSCREEN);
-	sel.snap = snap;
-	sel.oe.x = sel.ob.x = col;
-	sel.oe.y = sel.ob.y = row;
-	selnormalize();
-
-	if (sel.snap != 0)
-		sel.mode = SEL_READY;
-	tsetdirt(sel.nb.y, sel.ne.y);
-}
-
-void
-selextend(int col, int row, int type, int done)
-{
-	int oldey, oldex, oldsby, oldsey, oldtype;
-
-	if (sel.mode == SEL_IDLE)
-		return;
-	if (done && sel.mode == SEL_EMPTY) {
-		selclear();
-		return;
-	}
-
-	oldey = sel.oe.y;
-	oldex = sel.oe.x;
-	oldsby = sel.nb.y;
-	oldsey = sel.ne.y;
-	oldtype = sel.type;
-
-	sel.oe.x = col;
-	sel.oe.y = row;
-	selnormalize();
-	sel.type = type;
-
-	if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
-		tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
-
-	sel.mode = done ? SEL_IDLE : SEL_READY;
-}
-
-void
-selnormalize(void)
-{
-	int i;
-
-	if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
-		sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
-		sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
-	} else {
-		sel.nb.x = MIN(sel.ob.x, sel.oe.x);
-		sel.ne.x = MAX(sel.ob.x, sel.oe.x);
-	}
-	sel.nb.y = MIN(sel.ob.y, sel.oe.y);
-	sel.ne.y = MAX(sel.ob.y, sel.oe.y);
-
-	selsnap(&sel.nb.x, &sel.nb.y, -1);
-	selsnap(&sel.ne.x, &sel.ne.y, +1);
-
-	/* expand selection over line breaks */
-	if (sel.type == SEL_RECTANGULAR)
-		return;
-	i = tlinelen(sel.nb.y);
-	if (i < sel.nb.x)
-		sel.nb.x = i;
-	if (tlinelen(sel.ne.y) <= sel.ne.x)
-		sel.ne.x = term.col - 1;
-}
-
-int
-selected(int x, int y)
-{
-	if (sel.mode == SEL_EMPTY || sel.ob.x == -1 ||
-			sel.alt != IS_SET(MODE_ALTSCREEN))
-		return 0;
-
-	if (sel.type == SEL_RECTANGULAR)
-		return BETWEEN(y, sel.nb.y, sel.ne.y)
-		    && BETWEEN(x, sel.nb.x, sel.ne.x);
-
-	return BETWEEN(y, sel.nb.y, sel.ne.y)
-	    && (y != sel.nb.y || x >= sel.nb.x)
-	    && (y != sel.ne.y || x <= sel.ne.x);
-}
-
-void
-selsnap(int *x, int *y, int direction)
-{
-	int newx, newy, xt, yt;
-	int delim, prevdelim;
-	Glyph *gp, *prevgp;
-
-	switch (sel.snap) {
-	case SNAP_WORD:
-		/*
-		 * Snap around if the word wraps around at the end or
-		 * beginning of a line.
-		 */
-		prevgp = &term.line[*y][*x];
-		prevdelim = ISDELIM(prevgp->u);
-		for (;;) {
-			newx = *x + direction;
-			newy = *y;
-			if (!BETWEEN(newx, 0, term.col - 1)) {
-				newy += direction;
-				newx = (newx + term.col) % term.col;
-				if (!BETWEEN(newy, 0, term.row - 1))
-					break;
-
-				if (direction > 0)
-					yt = *y, xt = *x;
-				else
-					yt = newy, xt = newx;
-				if (!(term.line[yt][xt].mode & ATTR_WRAP))
-					break;
-			}
-
-			if (newx >= tlinelen(newy))
-				break;
-
-			gp = &term.line[newy][newx];
-			delim = ISDELIM(gp->u);
-			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
-					|| (delim && gp->u != prevgp->u)))
-				break;
-
-			*x = newx;
-			*y = newy;
-			prevgp = gp;
-			prevdelim = delim;
-		}
-		break;
-	case SNAP_LINE:
-		/*
-		 * Snap around if the the previous line or the current one
-		 * has set ATTR_WRAP at its end. Then the whole next or
-		 * previous line will be selected.
-		 */
-		*x = (direction < 0) ? 0 : term.col - 1;
-		if (direction < 0) {
-			for (; *y > 0; *y += direction) {
-				if (!(term.line[*y-1][term.col-1].mode
-						& ATTR_WRAP)) {
-					break;
-				}
-			}
-		} else if (direction > 0) {
-			for (; *y < term.row-1; *y += direction) {
-				if (!(term.line[*y][term.col-1].mode
-						& ATTR_WRAP)) {
-					break;
-				}
-			}
-		}
-		break;
-	}
-}
-
-char *
-getsel(void)
-{
-	char *str, *ptr;
-	int y, bufsize, lastx, linelen;
-	Glyph *gp, *last;
-
-	if (sel.ob.x == -1)
-		return NULL;
-
-	bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
-	ptr = str = xmalloc(bufsize);
-
-	/* append every set & selected glyph to the selection */
-	for (y = sel.nb.y; y <= sel.ne.y; y++) {
-		if ((linelen = tlinelen(y)) == 0) {
-			*ptr++ = '\n';
-			continue;
-		}
-
-		if (sel.type == SEL_RECTANGULAR) {
-			gp = &term.line[y][sel.nb.x];
-			lastx = sel.ne.x;
-		} else {
-			gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
-			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
-		}
-		last = &term.line[y][MIN(lastx, linelen-1)];
-		while (last >= gp && last->u == ' ')
-			--last;
-
-		for ( ; gp <= last; ++gp) {
-			if (gp->mode & ATTR_WDUMMY)
-				continue;
-
-			ptr += utf8encode(gp->u, ptr);
-		}
-
-		/*
-		 * Copy and pasting of line endings is inconsistent
-		 * in the inconsistent terminal and GUI world.
-		 * The best solution seems like to produce '\n' when
-		 * something is copied from st and convert '\n' to
-		 * '\r', when something to be pasted is received by
-		 * st.
-		 * FIXME: Fix the computer world.
-		 */
-		if ((y < sel.ne.y || lastx >= linelen) &&
-		    (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
-			*ptr++ = '\n';
-	}
-	*ptr = 0;
-	return str;
-}
-
-void
-selclear(void)
-{
-	if (sel.ob.x == -1)
-		return;
-	sel.mode = SEL_IDLE;
-	sel.ob.x = -1;
-	tsetdirt(sel.nb.y, sel.ne.y);
-}
-
-void
-die(const char *errstr, ...)
-{
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(1);
-}
-
-void
-execsh(char *cmd, char **args)
-{
-	char *sh, *prog, *arg;
-	const struct passwd *pw;
-
-	errno = 0;
-	if ((pw = getpwuid(getuid())) == NULL) {
-		if (errno)
-			die("getpwuid: %s\n", strerror(errno));
-		else
-			die("who are you?\n");
-	}
-
-	if ((sh = getenv("SHELL")) == NULL)
-		sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
-
-	if (args) {
-		prog = args[0];
-		arg = NULL;
-	} else if (scroll) {
-		prog = scroll;
-		arg = utmp ? utmp : sh;
-	} else if (utmp) {
-		prog = utmp;
-		arg = NULL;
-	} else {
-		prog = sh;
-		arg = NULL;
-	}
-	DEFAULT(args, ((char *[]) {prog, arg, NULL}));
-
-	unsetenv("COLUMNS");
-	unsetenv("LINES");
-	unsetenv("TERMCAP");
-	setenv("LOGNAME", pw->pw_name, 1);
-	setenv("USER", pw->pw_name, 1);
-	setenv("SHELL", sh, 1);
-	setenv("HOME", pw->pw_dir, 1);
-	setenv("TERM", termname, 1);
-
-	signal(SIGCHLD, SIG_DFL);
-	signal(SIGHUP, SIG_DFL);
-	signal(SIGINT, SIG_DFL);
-	signal(SIGQUIT, SIG_DFL);
-	signal(SIGTERM, SIG_DFL);
-	signal(SIGALRM, SIG_DFL);
-
-	execvp(prog, args);
-	_exit(1);
-}
-
-void
-sigchld(int a)
-{
-	int stat;
-	pid_t p;
-
-	if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
-		die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
-
-	if (pid != p)
-		return;
-
-	if (WIFEXITED(stat) && WEXITSTATUS(stat))
-		die("child exited with status %d\n", WEXITSTATUS(stat));
-	else if (WIFSIGNALED(stat))
-		die("child terminated due to signal %d\n", WTERMSIG(stat));
-	_exit(0);
-}
-
-void
-stty(char **args)
-{
-	char cmd[_POSIX_ARG_MAX], **p, *q, *s;
-	size_t n, siz;
-
-	if ((n = strlen(stty_args)) > sizeof(cmd)-1)
-		die("incorrect stty parameters\n");
-	memcpy(cmd, stty_args, n);
-	q = cmd + n;
-	siz = sizeof(cmd) - n;
-	for (p = args; p && (s = *p); ++p) {
-		if ((n = strlen(s)) > siz-1)
-			die("stty parameter length too long\n");
-		*q++ = ' ';
-		memcpy(q, s, n);
-		q += n;
-		siz -= n + 1;
-	}
-	*q = '\0';
-	if (system(cmd) != 0)
-		perror("Couldn't call stty");
-}
-
-int
-ttynew(char *line, char *cmd, char *out, char **args)
-{
-	int m, s;
-
-	if (out) {
-		term.mode |= MODE_PRINT;
-		iofd = (!strcmp(out, "-")) ?
-			  1 : open(out, O_WRONLY | O_CREAT, 0666);
-		if (iofd < 0) {
-			fprintf(stderr, "Error opening %s:%s\n",
-				out, strerror(errno));
-		}
-	}
-
-	if (line) {
-		if ((cmdfd = open(line, O_RDWR)) < 0)
-			die("open line '%s' failed: %s\n",
-			    line, strerror(errno));
-		dup2(cmdfd, 0);
-		stty(args);
-		return cmdfd;
-	}
-
-	/* seems to work fine on linux, openbsd and freebsd */
-	if (openpty(&m, &s, NULL, NULL, NULL) < 0)
-		die("openpty failed: %s\n", strerror(errno));
-
-	switch (pid = fork()) {
-	case -1:
-		die("fork failed: %s\n", strerror(errno));
-		break;
-	case 0:
-		close(iofd);
-		setsid(); /* create a new process group */
-		dup2(s, 0);
-		dup2(s, 1);
-		dup2(s, 2);
-		if (ioctl(s, TIOCSCTTY, NULL) < 0)
-			die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
-		close(s);
-		close(m);
-#ifdef __OpenBSD__
-		if (pledge("stdio getpw proc exec", NULL) == -1)
-			die("pledge\n");
-#endif
-		execsh(cmd, args);
-		break;
-	default:
-#ifdef __OpenBSD__
-		if (pledge("stdio rpath tty proc", NULL) == -1)
-			die("pledge\n");
-#endif
-		close(s);
-		cmdfd = m;
-		signal(SIGCHLD, sigchld);
-		break;
-	}
-	return cmdfd;
-}
-
-size_t
-ttyread(void)
-{
-	static char buf[BUFSIZ];
-	static int buflen = 0;
-	int ret, written;
-
-	/* append read bytes to unprocessed bytes */
-	ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);
-
-	switch (ret) {
-	case 0:
-		exit(0);
-	case -1:
-		die("couldn't read from shell: %s\n", strerror(errno));
-	default:
-		buflen += ret;
-		written = twrite(buf, buflen, 0);
-		buflen -= written;
-		/* keep any incomplete UTF-8 byte sequence for the next call */
-		if (buflen > 0)
-			memmove(buf, buf + written, buflen);
-		return ret;
-	}
-}
-
-void
-ttywrite(const char *s, size_t n, int may_echo)
-{
-	const char *next;
-
-	if (may_echo && IS_SET(MODE_ECHO))
-		twrite(s, n, 1);
-
-	if (!IS_SET(MODE_CRLF)) {
-		ttywriteraw(s, n);
-		return;
-	}
-
-	/* This is similar to how the kernel handles ONLCR for ttys */
-	while (n > 0) {
-		if (*s == '\r') {
-			next = s + 1;
-			ttywriteraw("\r\n", 2);
-		} else {
-			next = memchr(s, '\r', n);
-			DEFAULT(next, s + n);
-			ttywriteraw(s, next - s);
-		}
-		n -= next - s;
-		s = next;
-	}
-}
-
-void
-ttywriteraw(const char *s, size_t n)
-{
-	fd_set wfd, rfd;
-	ssize_t r;
-	size_t lim = 256;
-
-	/*
-	 * Remember that we are using a pty, which might be a modem line.
-	 * Writing too much will clog the line. That's why we are doing this
-	 * dance.
-	 * FIXME: Migrate the world to Plan 9.
-	 */
-	while (n > 0) {
-		FD_ZERO(&wfd);
-		FD_ZERO(&rfd);
-		FD_SET(cmdfd, &wfd);
-		FD_SET(cmdfd, &rfd);
-
-		/* Check if we can write. */
-		if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
-			if (errno == EINTR)
-				continue;
-			die("select failed: %s\n", strerror(errno));
-		}
-		if (FD_ISSET(cmdfd, &wfd)) {
-			/*
-			 * Only write the bytes written by ttywrite() or the
-			 * default of 256. This seems to be a reasonable value
-			 * for a serial line. Bigger values might clog the I/O.
-			 */
-			if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
-				goto write_error;
-			if (r < n) {
-				/*
-				 * We weren't able to write out everything.
-				 * This means the buffer is getting full
-				 * again. Empty it.
-				 */
-				if (n < lim)
-					lim = ttyread();
-				n -= r;
-				s += r;
-			} else {
-				/* All bytes have been written. */
-				break;
-			}
-		}
-		if (FD_ISSET(cmdfd, &rfd))
-			lim = ttyread();
-	}
-	return;
-
-write_error:
-	die("write error on tty: %s\n", strerror(errno));
-}
-
-void
-ttyresize(int tw, int th)
-{
-	struct winsize w;
-
-	w.ws_row = term.row;
-	w.ws_col = term.col;
-	w.ws_xpixel = tw;
-	w.ws_ypixel = th;
-	if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
-		fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
-}
-
-void
-ttyhangup()
-{
-	/* Send SIGHUP to shell */
-	kill(pid, SIGHUP);
-}
-
-int
-tattrset(int attr)
-{
-	int i, j;
-
-	for (i = 0; i < term.row-1; i++) {
-		for (j = 0; j < term.col-1; j++) {
-			if (term.line[i][j].mode & attr)
-				return 1;
-		}
-	}
-
-	return 0;
-}
-
-void
-tsetdirt(int top, int bot)
-{
-	int i;
-
-	LIMIT(top, 0, term.row-1);
-	LIMIT(bot, 0, term.row-1);
-
-	for (i = top; i <= bot; i++)
-		term.dirty[i] = 1;
-}
-
-void
-tsetdirtattr(int attr)
-{
-	int i, j;
-
-	for (i = 0; i < term.row-1; i++) {
-		for (j = 0; j < term.col-1; j++) {
-			if (term.line[i][j].mode & attr) {
-				tsetdirt(i, i);
-				break;
-			}
-		}
-	}
-}
-
-void
-tfulldirt(void)
-{
-	tsetdirt(0, term.row-1);
-}
-
-void
-tcursor(int mode)
-{
-	static TCursor c[2];
-	int alt = IS_SET(MODE_ALTSCREEN);
-
-	if (mode == CURSOR_SAVE) {
-		c[alt] = term.c;
-	} else if (mode == CURSOR_LOAD) {
-		term.c = c[alt];
-		tmoveto(c[alt].x, c[alt].y);
-	}
-}
-
-void
-treset(void)
-{
-	uint i;
-
-	term.c = (TCursor){{
-		.mode = ATTR_NULL,
-		.fg = defaultfg,
-		.bg = defaultbg
-	}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
-
-	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
-	for (i = tabspaces; i < term.col; i += tabspaces)
-		term.tabs[i] = 1;
-	term.top = 0;
-	term.bot = term.row - 1;
-	term.mode = MODE_WRAP|MODE_UTF8;
-	memset(term.trantbl, CS_USA, sizeof(term.trantbl));
-	term.charset = 0;
-
-	for (i = 0; i < 2; i++) {
-		tmoveto(0, 0);
-		tcursor(CURSOR_SAVE);
-		tclearregion(0, 0, term.col-1, term.row-1);
-		tswapscreen();
-	}
-}
-
-void
-tnew(int col, int row)
-{
-	term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
-	tresize(col, row);
-	treset();
-}
-
-void
-tswapscreen(void)
-{
-	Line *tmp = term.line;
-
-	term.line = term.alt;
-	term.alt = tmp;
-	term.mode ^= MODE_ALTSCREEN;
-	tfulldirt();
-}
-
-void
-tscrolldown(int orig, int n)
-{
-	int i;
-	Line temp;
-
-	LIMIT(n, 0, term.bot-orig+1);
-
-	tsetdirt(orig, term.bot-n);
-	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
-
-	for (i = term.bot; i >= orig+n; i--) {
-		temp = term.line[i];
-		term.line[i] = term.line[i-n];
-		term.line[i-n] = temp;
-	}
-
-	selscroll(orig, n);
-}
-
-void
-tscrollup(int orig, int n)
-{
-	int i;
-	Line temp;
-
-	LIMIT(n, 0, term.bot-orig+1);
-
-	tclearregion(0, orig, term.col-1, orig+n-1);
-	tsetdirt(orig+n, term.bot);
-
-	for (i = orig; i <= term.bot-n; i++) {
-		temp = term.line[i];
-		term.line[i] = term.line[i+n];
-		term.line[i+n] = temp;
-	}
-
-	selscroll(orig, -n);
-}
-
-void
-selscroll(int orig, int n)
-{
-	if (sel.ob.x == -1)
-		return;
-
-	if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
-		selclear();
-	} else if (BETWEEN(sel.nb.y, orig, term.bot)) {
-		sel.ob.y += n;
-		sel.oe.y += n;
-		if (sel.ob.y < term.top || sel.ob.y > term.bot ||
-		    sel.oe.y < term.top || sel.oe.y > term.bot) {
-			selclear();
-		} else {
-			selnormalize();
-		}
-	}
-}
-
-void
-tnewline(int first_col)
-{
-	int y = term.c.y;
-
-	if (y == term.bot) {
-		tscrollup(term.top, 1);
-	} else {
-		y++;
-	}
-	tmoveto(first_col ? 0 : term.c.x, y);
-}
-
-void
-csiparse(void)
-{
-	char *p = csiescseq.buf, *np;
-	long int v;
-
-	csiescseq.narg = 0;
-	if (*p == '?') {
-		csiescseq.priv = 1;
-		p++;
-	}
-
-	csiescseq.buf[csiescseq.len] = '\0';
-	while (p < csiescseq.buf+csiescseq.len) {
-		np = NULL;
-		v = strtol(p, &np, 10);
-		if (np == p)
-			v = 0;
-		if (v == LONG_MAX || v == LONG_MIN)
-			v = -1;
-		csiescseq.arg[csiescseq.narg++] = v;
-		p = np;
-		if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
-			break;
-		p++;
-	}
-	csiescseq.mode[0] = *p++;
-	csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
-}
-
-/* for absolute user moves, when decom is set */
-void
-tmoveato(int x, int y)
-{
-	tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
-}
-
-void
-tmoveto(int x, int y)
-{
-	int miny, maxy;
-
-	if (term.c.state & CURSOR_ORIGIN) {
-		miny = term.top;
-		maxy = term.bot;
-	} else {
-		miny = 0;
-		maxy = term.row - 1;
-	}
-	term.c.state &= ~CURSOR_WRAPNEXT;
-	term.c.x = LIMIT(x, 0, term.col-1);
-	term.c.y = LIMIT(y, miny, maxy);
-}
-
-void
-tsetchar(Rune u, Glyph *attr, int x, int y)
-{
-	static char *vt100_0[62] = { /* 0x41 - 0x7e */
-		"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
-		0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
-		0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
-		0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
-		"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
-		"␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
-		"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
-		"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
-	};
-
-	/*
-	 * The table is proudly stolen from rxvt.
-	 */
-	if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
-	   BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
-		utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
-
-	if (term.line[y][x].mode & ATTR_WIDE) {
-		if (x+1 < term.col) {
-			term.line[y][x+1].u = ' ';
-			term.line[y][x+1].mode &= ~ATTR_WDUMMY;
-		}
-	} else if (term.line[y][x].mode & ATTR_WDUMMY) {
-		term.line[y][x-1].u = ' ';
-		term.line[y][x-1].mode &= ~ATTR_WIDE;
-	}
-
-	term.dirty[y] = 1;
-	term.line[y][x] = *attr;
-	term.line[y][x].u = u;
-}
-
-void
-tclearregion(int x1, int y1, int x2, int y2)
-{
-	int x, y, temp;
-	Glyph *gp;
-
-	if (x1 > x2)
-		temp = x1, x1 = x2, x2 = temp;
-	if (y1 > y2)
-		temp = y1, y1 = y2, y2 = temp;
-
-	LIMIT(x1, 0, term.col-1);
-	LIMIT(x2, 0, term.col-1);
-	LIMIT(y1, 0, term.row-1);
-	LIMIT(y2, 0, term.row-1);
-
-	for (y = y1; y <= y2; y++) {
-		term.dirty[y] = 1;
-		for (x = x1; x <= x2; x++) {
-			gp = &term.line[y][x];
-			if (selected(x, y))
-				selclear();
-			gp->fg = term.c.attr.fg;
-			gp->bg = term.c.attr.bg;
-			gp->mode = 0;
-			gp->u = ' ';
-		}
-	}
-}
-
-void
-tdeletechar(int n)
-{
-	int dst, src, size;
-	Glyph *line;
-
-	LIMIT(n, 0, term.col - term.c.x);
-
-	dst = term.c.x;
-	src = term.c.x + n;
-	size = term.col - src;
-	line = term.line[term.c.y];
-
-	memmove(&line[dst], &line[src], size * sizeof(Glyph));
-	tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
-}
-
-void
-tinsertblank(int n)
-{
-	int dst, src, size;
-	Glyph *line;
-
-	LIMIT(n, 0, term.col - term.c.x);
-
-	dst = term.c.x + n;
-	src = term.c.x;
-	size = term.col - dst;
-	line = term.line[term.c.y];
-
-	memmove(&line[dst], &line[src], size * sizeof(Glyph));
-	tclearregion(src, term.c.y, dst - 1, term.c.y);
-}
-
-void
-tinsertblankline(int n)
-{
-	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrolldown(term.c.y, n);
-}
-
-void
-tdeleteline(int n)
-{
-	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrollup(term.c.y, n);
-}
-
-int32_t
-tdefcolor(int *attr, int *npar, int l)
-{
-	int32_t idx = -1;
-	uint r, g, b;
-
-	switch (attr[*npar + 1]) {
-	case 2: /* direct color in RGB space */
-		if (*npar + 4 >= l) {
-			fprintf(stderr,
-				"erresc(38): Incorrect number of parameters (%d)\n",
-				*npar);
-			break;
-		}
-		r = attr[*npar + 2];
-		g = attr[*npar + 3];
-		b = attr[*npar + 4];
-		*npar += 4;
-		if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
-			fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
-				r, g, b);
-		else
-			idx = TRUECOLOR(r, g, b);
-		break;
-	case 5: /* indexed color */
-		if (*npar + 2 >= l) {
-			fprintf(stderr,
-				"erresc(38): Incorrect number of parameters (%d)\n",
-				*npar);
-			break;
-		}
-		*npar += 2;
-		if (!BETWEEN(attr[*npar], 0, 255))
-			fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
-		else
-			idx = attr[*npar];
-		break;
-	case 0: /* implemented defined (only foreground) */
-	case 1: /* transparent */
-	case 3: /* direct color in CMY space */
-	case 4: /* direct color in CMYK space */
-	default:
-		fprintf(stderr,
-		        "erresc(38): gfx attr %d unknown\n", attr[*npar]);
-		break;
-	}
-
-	return idx;
-}
-
-void
-tsetattr(int *attr, int l)
-{
-	int i;
-	int32_t idx;
-
-	for (i = 0; i < l; i++) {
-		switch (attr[i]) {
-		case 0:
-			term.c.attr.mode &= ~(
-				ATTR_BOLD       |
-				ATTR_FAINT      |
-				ATTR_ITALIC     |
-				ATTR_UNDERLINE  |
-				ATTR_BLINK      |
-				ATTR_REVERSE    |
-				ATTR_INVISIBLE  |
-				ATTR_STRUCK     );
-			term.c.attr.fg = defaultfg;
-			term.c.attr.bg = defaultbg;
-			break;
-		case 1:
-			term.c.attr.mode |= ATTR_BOLD;
-			break;
-		case 2:
-			term.c.attr.mode |= ATTR_FAINT;
-			break;
-		case 3:
-			term.c.attr.mode |= ATTR_ITALIC;
-			break;
-		case 4:
-			term.c.attr.mode |= ATTR_UNDERLINE;
-			break;
-		case 5: /* slow blink */
-			/* FALLTHROUGH */
-		case 6: /* rapid blink */
-			term.c.attr.mode |= ATTR_BLINK;
-			break;
-		case 7:
-			term.c.attr.mode |= ATTR_REVERSE;
-			break;
-		case 8:
-			term.c.attr.mode |= ATTR_INVISIBLE;
-			break;
-		case 9:
-			term.c.attr.mode |= ATTR_STRUCK;
-			break;
-		case 22:
-			term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
-			break;
-		case 23:
-			term.c.attr.mode &= ~ATTR_ITALIC;
-			break;
-		case 24:
-			term.c.attr.mode &= ~ATTR_UNDERLINE;
-			break;
-		case 25:
-			term.c.attr.mode &= ~ATTR_BLINK;
-			break;
-		case 27:
-			term.c.attr.mode &= ~ATTR_REVERSE;
-			break;
-		case 28:
-			term.c.attr.mode &= ~ATTR_INVISIBLE;
-			break;
-		case 29:
-			term.c.attr.mode &= ~ATTR_STRUCK;
-			break;
-		case 38:
-			if ((idx = tdefcolor(attr, &i, l)) >= 0)
-				term.c.attr.fg = idx;
-			break;
-		case 39:
-			term.c.attr.fg = defaultfg;
-			break;
-		case 48:
-			if ((idx = tdefcolor(attr, &i, l)) >= 0)
-				term.c.attr.bg = idx;
-			break;
-		case 49:
-			term.c.attr.bg = defaultbg;
-			break;
-		default:
-			if (BETWEEN(attr[i], 30, 37)) {
-				term.c.attr.fg = attr[i] - 30;
-			} else if (BETWEEN(attr[i], 40, 47)) {
-				term.c.attr.bg = attr[i] - 40;
-			} else if (BETWEEN(attr[i], 90, 97)) {
-				term.c.attr.fg = attr[i] - 90 + 8;
-			} else if (BETWEEN(attr[i], 100, 107)) {
-				term.c.attr.bg = attr[i] - 100 + 8;
-			} else {
-				fprintf(stderr,
-					"erresc(default): gfx attr %d unknown\n",
-					attr[i]);
-				csidump();
-			}
-			break;
-		}
-	}
-}
-
-void
-tsetscroll(int t, int b)
-{
-	int temp;
-
-	LIMIT(t, 0, term.row-1);
-	LIMIT(b, 0, term.row-1);
-	if (t > b) {
-		temp = t;
-		t = b;
-		b = temp;
-	}
-	term.top = t;
-	term.bot = b;
-}
-
-void
-tsetmode(int priv, int set, int *args, int narg)
-{
-	int alt, *lim;
-
-	for (lim = args + narg; args < lim; ++args) {
-		if (priv) {
-			switch (*args) {
-			case 1: /* DECCKM -- Cursor key */
-				xsetmode(set, MODE_APPCURSOR);
-				break;
-			case 5: /* DECSCNM -- Reverse video */
-				xsetmode(set, MODE_REVERSE);
-				break;
-			case 6: /* DECOM -- Origin */
-				MODBIT(term.c.state, set, CURSOR_ORIGIN);
-				tmoveato(0, 0);
-				break;
-			case 7: /* DECAWM -- Auto wrap */
-				MODBIT(term.mode, set, MODE_WRAP);
-				break;
-			case 0:  /* Error (IGNORED) */
-			case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
-			case 3:  /* DECCOLM -- Column  (IGNORED) */
-			case 4:  /* DECSCLM -- Scroll (IGNORED) */
-			case 8:  /* DECARM -- Auto repeat (IGNORED) */
-			case 18: /* DECPFF -- Printer feed (IGNORED) */
-			case 19: /* DECPEX -- Printer extent (IGNORED) */
-			case 42: /* DECNRCM -- National characters (IGNORED) */
-			case 12: /* att610 -- Start blinking cursor (IGNORED) */
-				break;
-			case 25: /* DECTCEM -- Text Cursor Enable Mode */
-				xsetmode(!set, MODE_HIDE);
-				break;
-			case 9:    /* X10 mouse compatibility mode */
-				xsetpointermotion(0);
-				xsetmode(0, MODE_MOUSE);
-				xsetmode(set, MODE_MOUSEX10);
-				break;
-			case 1000: /* 1000: report button press */
-				xsetpointermotion(0);
-				xsetmode(0, MODE_MOUSE);
-				xsetmode(set, MODE_MOUSEBTN);
-				break;
-			case 1002: /* 1002: report motion on button press */
-				xsetpointermotion(0);
-				xsetmode(0, MODE_MOUSE);
-				xsetmode(set, MODE_MOUSEMOTION);
-				break;
-			case 1003: /* 1003: enable all mouse motions */
-				xsetpointermotion(set);
-				xsetmode(0, MODE_MOUSE);
-				xsetmode(set, MODE_MOUSEMANY);
-				break;
-			case 1004: /* 1004: send focus events to tty */
-				xsetmode(set, MODE_FOCUS);
-				break;
-			case 1006: /* 1006: extended reporting mode */
-				xsetmode(set, MODE_MOUSESGR);
-				break;
-			case 1034:
-				xsetmode(set, MODE_8BIT);
-				break;
-			case 1049: /* swap screen & set/restore cursor as xterm */
-				if (!allowaltscreen)
-					break;
-				tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
-				/* FALLTHROUGH */
-			case 47: /* swap screen */
-			case 1047:
-				if (!allowaltscreen)
-					break;
-				alt = IS_SET(MODE_ALTSCREEN);
-				if (alt) {
-					tclearregion(0, 0, term.col-1,
-							term.row-1);
-				}
-				if (set ^ alt) /* set is always 1 or 0 */
-					tswapscreen();
-				if (*args != 1049)
-					break;
-				/* FALLTHROUGH */
-			case 1048:
-				tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
-				break;
-			case 2004: /* 2004: bracketed paste mode */
-				xsetmode(set, MODE_BRCKTPASTE);
-				break;
-			/* Not implemented mouse modes. See comments there. */
-			case 1001: /* mouse highlight mode; can hang the
-				      terminal by design when implemented. */
-			case 1005: /* UTF-8 mouse mode; will confuse
-				      applications not supporting UTF-8
-				      and luit. */
-			case 1015: /* urxvt mangled mouse mode; incompatible
-				      and can be mistaken for other control
-				      codes. */
-				break;
-			default:
-				fprintf(stderr,
-					"erresc: unknown private set/reset mode %d\n",
-					*args);
-				break;
-			}
-		} else {
-			switch (*args) {
-			case 0:  /* Error (IGNORED) */
-				break;
-			case 2:
-				xsetmode(set, MODE_KBDLOCK);
-				break;
-			case 4:  /* IRM -- Insertion-replacement */
-				MODBIT(term.mode, set, MODE_INSERT);
-				break;
-			case 12: /* SRM -- Send/Receive */
-				MODBIT(term.mode, !set, MODE_ECHO);
-				break;
-			case 20: /* LNM -- Linefeed/new line */
-				MODBIT(term.mode, set, MODE_CRLF);
-				break;
-			default:
-				fprintf(stderr,
-					"erresc: unknown set/reset mode %d\n",
-					*args);
-				break;
-			}
-		}
-	}
-}
-
-void
-csihandle(void)
-{
-	char buf[40];
-	int len;
-
-	switch (csiescseq.mode[0]) {
-	default:
-	unknown:
-		fprintf(stderr, "erresc: unknown csi ");
-		csidump();
-		/* die(""); */
-		break;
-	case '@': /* ICH -- Insert <n> blank char */
-		DEFAULT(csiescseq.arg[0], 1);
-		tinsertblank(csiescseq.arg[0]);
-		break;
-	case 'A': /* CUU -- Cursor <n> Up */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
-		break;
-	case 'B': /* CUD -- Cursor <n> Down */
-	case 'e': /* VPR --Cursor <n> Down */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
-		break;
-	case 'i': /* MC -- Media Copy */
-		switch (csiescseq.arg[0]) {
-		case 0:
-			tdump();
-			break;
-		case 1:
-			tdumpline(term.c.y);
-			break;
-		case 2:
-			tdumpsel();
-			break;
-		case 4:
-			term.mode &= ~MODE_PRINT;
-			break;
-		case 5:
-			term.mode |= MODE_PRINT;
-			break;
-		}
-		break;
-	case 'c': /* DA -- Device Attributes */
-		if (csiescseq.arg[0] == 0)
-			ttywrite(vtiden, strlen(vtiden), 0);
-		break;
-	case 'b': /* REP -- if last char is printable print it <n> more times */
-		DEFAULT(csiescseq.arg[0], 1);
-		if (term.lastc)
-			while (csiescseq.arg[0]-- > 0)
-				tputc(term.lastc);
-		break;
-	case 'C': /* CUF -- Cursor <n> Forward */
-	case 'a': /* HPR -- Cursor <n> Forward */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
-		break;
-	case 'D': /* CUB -- Cursor <n> Backward */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
-		break;
-	case 'E': /* CNL -- Cursor <n> Down and first col */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(0, term.c.y+csiescseq.arg[0]);
-		break;
-	case 'F': /* CPL -- Cursor <n> Up and first col */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(0, term.c.y-csiescseq.arg[0]);
-		break;
-	case 'g': /* TBC -- Tabulation clear */
-		switch (csiescseq.arg[0]) {
-		case 0: /* clear current tab stop */
-			term.tabs[term.c.x] = 0;
-			break;
-		case 3: /* clear all the tabs */
-			memset(term.tabs, 0, term.col * sizeof(*term.tabs));
-			break;
-		default:
-			goto unknown;
-		}
-		break;
-	case 'G': /* CHA -- Move to <col> */
-	case '`': /* HPA */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveto(csiescseq.arg[0]-1, term.c.y);
-		break;
-	case 'H': /* CUP -- Move to <row> <col> */
-	case 'f': /* HVP */
-		DEFAULT(csiescseq.arg[0], 1);
-		DEFAULT(csiescseq.arg[1], 1);
-		tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
-		break;
-	case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
-		DEFAULT(csiescseq.arg[0], 1);
-		tputtab(csiescseq.arg[0]);
-		break;
-	case 'J': /* ED -- Clear screen */
-		switch (csiescseq.arg[0]) {
-		case 0: /* below */
-			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-			if (term.c.y < term.row-1) {
-				tclearregion(0, term.c.y+1, term.col-1,
-						term.row-1);
-			}
-			break;
-		case 1: /* above */
-			if (term.c.y > 1)
-				tclearregion(0, 0, term.col-1, term.c.y-1);
-			tclearregion(0, term.c.y, term.c.x, term.c.y);
-			break;
-		case 2: /* all */
-			tclearregion(0, 0, term.col-1, term.row-1);
-			break;
-		default:
-			goto unknown;
-		}
-		break;
-	case 'K': /* EL -- Clear line */
-		switch (csiescseq.arg[0]) {
-		case 0: /* right */
-			tclearregion(term.c.x, term.c.y, term.col-1,
-					term.c.y);
-			break;
-		case 1: /* left */
-			tclearregion(0, term.c.y, term.c.x, term.c.y);
-			break;
-		case 2: /* all */
-			tclearregion(0, term.c.y, term.col-1, term.c.y);
-			break;
-		}
-		break;
-	case 'S': /* SU -- Scroll <n> line up */
-		DEFAULT(csiescseq.arg[0], 1);
-		tscrollup(term.top, csiescseq.arg[0]);
-		break;
-	case 'T': /* SD -- Scroll <n> line down */
-		DEFAULT(csiescseq.arg[0], 1);
-		tscrolldown(term.top, csiescseq.arg[0]);
-		break;
-	case 'L': /* IL -- Insert <n> blank lines */
-		DEFAULT(csiescseq.arg[0], 1);
-		tinsertblankline(csiescseq.arg[0]);
-		break;
-	case 'l': /* RM -- Reset Mode */
-		tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
-		break;
-	case 'M': /* DL -- Delete <n> lines */
-		DEFAULT(csiescseq.arg[0], 1);
-		tdeleteline(csiescseq.arg[0]);
-		break;
-	case 'X': /* ECH -- Erase <n> char */
-		DEFAULT(csiescseq.arg[0], 1);
-		tclearregion(term.c.x, term.c.y,
-				term.c.x + csiescseq.arg[0] - 1, term.c.y);
-		break;
-	case 'P': /* DCH -- Delete <n> char */
-		DEFAULT(csiescseq.arg[0], 1);
-		tdeletechar(csiescseq.arg[0]);
-		break;
-	case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
-		DEFAULT(csiescseq.arg[0], 1);
-		tputtab(-csiescseq.arg[0]);
-		break;
-	case 'd': /* VPA -- Move to <row> */
-		DEFAULT(csiescseq.arg[0], 1);
-		tmoveato(term.c.x, csiescseq.arg[0]-1);
-		break;
-	case 'h': /* SM -- Set terminal mode */
-		tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
-		break;
-	case 'm': /* SGR -- Terminal attribute (color) */
-		tsetattr(csiescseq.arg, csiescseq.narg);
-		break;
-	case 'n': /* DSR – Device Status Report (cursor position) */
-		if (csiescseq.arg[0] == 6) {
-			len = snprintf(buf, sizeof(buf), "\033[%i;%iR",
-					term.c.y+1, term.c.x+1);
-			ttywrite(buf, len, 0);
-		}
-		break;
-	case 'r': /* DECSTBM -- Set Scrolling Region */
-		if (csiescseq.priv) {
-			goto unknown;
-		} else {
-			DEFAULT(csiescseq.arg[0], 1);
-			DEFAULT(csiescseq.arg[1], term.row);
-			tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
-			tmoveato(0, 0);
-		}
-		break;
-	case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
-		tcursor(CURSOR_SAVE);
-		break;
-	case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
-		tcursor(CURSOR_LOAD);
-		break;
-	case ' ':
-		switch (csiescseq.mode[1]) {
-		case 'q': /* DECSCUSR -- Set Cursor Style */
-			if (xsetcursor(csiescseq.arg[0]))
-				goto unknown;
-			break;
-		default:
-			goto unknown;
-		}
-		break;
-	}
-}
-
-void
-csidump(void)
-{
-	size_t i;
-	uint c;
-
-	fprintf(stderr, "ESC[");
-	for (i = 0; i < csiescseq.len; i++) {
-		c = csiescseq.buf[i] & 0xff;
-		if (isprint(c)) {
-			putc(c, stderr);
-		} else if (c == '\n') {
-			fprintf(stderr, "(\\n)");
-		} else if (c == '\r') {
-			fprintf(stderr, "(\\r)");
-		} else if (c == 0x1b) {
-			fprintf(stderr, "(\\e)");
-		} else {
-			fprintf(stderr, "(%02x)", c);
-		}
-	}
-	putc('\n', stderr);
-}
-
-void
-csireset(void)
-{
-	memset(&csiescseq, 0, sizeof(csiescseq));
-}
-
-void
-strhandle(void)
-{
-	char *p = NULL, *dec;
-	int j, narg, par;
-
-	term.esc &= ~(ESC_STR_END|ESC_STR);
-	strparse();
-	par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
-
-	switch (strescseq.type) {
-	case ']': /* OSC -- Operating System Command */
-		switch (par) {
-		case 0:
-		case 1:
-		case 2:
-			if (narg > 1)
-				xsettitle(strescseq.args[1]);
-			return;
-		case 52:
-			if (narg > 2 && allowwindowops) {
-				dec = base64dec(strescseq.args[2]);
-				if (dec) {
-					xsetsel(dec);
-					xclipcopy();
-				} else {
-					fprintf(stderr, "erresc: invalid base64\n");
-				}
-			}
-			return;
-		case 4: /* color set */
-			if (narg < 3)
-				break;
-			p = strescseq.args[2];
-			/* FALLTHROUGH */
-		case 104: /* color reset, here p = NULL */
-			j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
-			if (xsetcolorname(j, p)) {
-				if (par == 104 && narg <= 1)
-					return; /* color reset without parameter */
-				fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
-				        j, p ? p : "(null)");
-			} else {
-				/*
-				 * TODO if defaultbg color is changed, borders
-				 * are dirty
-				 */
-				redraw();
-			}
-			return;
-		}
-		break;
-	case 'k': /* old title set compatibility */
-		xsettitle(strescseq.args[0]);
-		return;
-	case 'P': /* DCS -- Device Control String */
-	case '_': /* APC -- Application Program Command */
-	case '^': /* PM -- Privacy Message */
-		return;
-	}
-
-	fprintf(stderr, "erresc: unknown str ");
-	strdump();
-}
-
-void
-strparse(void)
-{
-	int c;
-	char *p = strescseq.buf;
-
-	strescseq.narg = 0;
-	strescseq.buf[strescseq.len] = '\0';
-
-	if (*p == '\0')
-		return;
-
-	while (strescseq.narg < STR_ARG_SIZ) {
-		strescseq.args[strescseq.narg++] = p;
-		while ((c = *p) != ';' && c != '\0')
-			++p;
-		if (c == '\0')
-			return;
-		*p++ = '\0';
-	}
-}
-
-void
-strdump(void)
-{
-	size_t i;
-	uint c;
-
-	fprintf(stderr, "ESC%c", strescseq.type);
-	for (i = 0; i < strescseq.len; i++) {
-		c = strescseq.buf[i] & 0xff;
-		if (c == '\0') {
-			putc('\n', stderr);
-			return;
-		} else if (isprint(c)) {
-			putc(c, stderr);
-		} else if (c == '\n') {
-			fprintf(stderr, "(\\n)");
-		} else if (c == '\r') {
-			fprintf(stderr, "(\\r)");
-		} else if (c == 0x1b) {
-			fprintf(stderr, "(\\e)");
-		} else {
-			fprintf(stderr, "(%02x)", c);
-		}
-	}
-	fprintf(stderr, "ESC\\\n");
-}
-
-void
-strreset(void)
-{
-	strescseq = (STREscape){
-		.buf = xrealloc(strescseq.buf, STR_BUF_SIZ),
-		.siz = STR_BUF_SIZ,
-	};
-}
-
-void
-sendbreak(const Arg *arg)
-{
-	if (tcsendbreak(cmdfd, 0))
-		perror("Error sending break");
-}
-
-void
-tprinter(char *s, size_t len)
-{
-	if (iofd != -1 && xwrite(iofd, s, len) < 0) {
-		perror("Error writing to output file");
-		close(iofd);
-		iofd = -1;
-	}
-}
-
-void
-toggleprinter(const Arg *arg)
-{
-	term.mode ^= MODE_PRINT;
-}
-
-void
-printscreen(const Arg *arg)
-{
-	tdump();
-}
-
-void
-printsel(const Arg *arg)
-{
-	tdumpsel();
-}
-
-void
-tdumpsel(void)
-{
-	char *ptr;
-
-	if ((ptr = getsel())) {
-		tprinter(ptr, strlen(ptr));
-		free(ptr);
-	}
-}
-
-void
-tdumpline(int n)
-{
-	char buf[UTF_SIZ];
-	Glyph *bp, *end;
-
-	bp = &term.line[n][0];
-	end = &bp[MIN(tlinelen(n), term.col) - 1];
-	if (bp != end || bp->u != ' ') {
-		for ( ; bp <= end; ++bp)
-			tprinter(buf, utf8encode(bp->u, buf));
-	}
-	tprinter("\n", 1);
-}
-
-void
-tdump(void)
-{
-	int i;
-
-	for (i = 0; i < term.row; ++i)
-		tdumpline(i);
-}
-
-void
-tputtab(int n)
-{
-	uint x = term.c.x;
-
-	if (n > 0) {
-		while (x < term.col && n--)
-			for (++x; x < term.col && !term.tabs[x]; ++x)
-				/* nothing */ ;
-	} else if (n < 0) {
-		while (x > 0 && n++)
-			for (--x; x > 0 && !term.tabs[x]; --x)
-				/* nothing */ ;
-	}
-	term.c.x = LIMIT(x, 0, term.col-1);
-}
-
-void
-tdefutf8(char ascii)
-{
-	if (ascii == 'G')
-		term.mode |= MODE_UTF8;
-	else if (ascii == '@')
-		term.mode &= ~MODE_UTF8;
-}
-
-void
-tdeftran(char ascii)
-{
-	static char cs[] = "0B";
-	static int vcs[] = {CS_GRAPHIC0, CS_USA};
-	char *p;
-
-	if ((p = strchr(cs, ascii)) == NULL) {
-		fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
-	} else {
-		term.trantbl[term.icharset] = vcs[p - cs];
-	}
-}
-
-void
-tdectest(char c)
-{
-	int x, y;
-
-	if (c == '8') { /* DEC screen alignment test. */
-		for (x = 0; x < term.col; ++x) {
-			for (y = 0; y < term.row; ++y)
-				tsetchar('E', &term.c.attr, x, y);
-		}
-	}
-}
-
-void
-tstrsequence(uchar c)
-{
-	switch (c) {
-	case 0x90:   /* DCS -- Device Control String */
-		c = 'P';
-		break;
-	case 0x9f:   /* APC -- Application Program Command */
-		c = '_';
-		break;
-	case 0x9e:   /* PM -- Privacy Message */
-		c = '^';
-		break;
-	case 0x9d:   /* OSC -- Operating System Command */
-		c = ']';
-		break;
-	}
-	strreset();
-	strescseq.type = c;
-	term.esc |= ESC_STR;
-}
-
-void
-tcontrolcode(uchar ascii)
-{
-	switch (ascii) {
-	case '\t':   /* HT */
-		tputtab(1);
-		return;
-	case '\b':   /* BS */
-		tmoveto(term.c.x-1, term.c.y);
-		return;
-	case '\r':   /* CR */
-		tmoveto(0, term.c.y);
-		return;
-	case '\f':   /* LF */
-	case '\v':   /* VT */
-	case '\n':   /* LF */
-		/* go to first col if the mode is set */
-		tnewline(IS_SET(MODE_CRLF));
-		return;
-	case '\a':   /* BEL */
-		if (term.esc & ESC_STR_END) {
-			/* backwards compatibility to xterm */
-			strhandle();
-		} else {
-			xbell();
-		}
-		break;
-	case '\033': /* ESC */
-		csireset();
-		term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
-		term.esc |= ESC_START;
-		return;
-	case '\016': /* SO (LS1 -- Locking shift 1) */
-	case '\017': /* SI (LS0 -- Locking shift 0) */
-		term.charset = 1 - (ascii - '\016');
-		return;
-	case '\032': /* SUB */
-		tsetchar('?', &term.c.attr, term.c.x, term.c.y);
-		/* FALLTHROUGH */
-	case '\030': /* CAN */
-		csireset();
-		break;
-	case '\005': /* ENQ (IGNORED) */
-	case '\000': /* NUL (IGNORED) */
-	case '\021': /* XON (IGNORED) */
-	case '\023': /* XOFF (IGNORED) */
-	case 0177:   /* DEL (IGNORED) */
-		return;
-	case 0x80:   /* TODO: PAD */
-	case 0x81:   /* TODO: HOP */
-	case 0x82:   /* TODO: BPH */
-	case 0x83:   /* TODO: NBH */
-	case 0x84:   /* TODO: IND */
-		break;
-	case 0x85:   /* NEL -- Next line */
-		tnewline(1); /* always go to first col */
-		break;
-	case 0x86:   /* TODO: SSA */
-	case 0x87:   /* TODO: ESA */
-		break;
-	case 0x88:   /* HTS -- Horizontal tab stop */
-		term.tabs[term.c.x] = 1;
-		break;
-	case 0x89:   /* TODO: HTJ */
-	case 0x8a:   /* TODO: VTS */
-	case 0x8b:   /* TODO: PLD */
-	case 0x8c:   /* TODO: PLU */
-	case 0x8d:   /* TODO: RI */
-	case 0x8e:   /* TODO: SS2 */
-	case 0x8f:   /* TODO: SS3 */
-	case 0x91:   /* TODO: PU1 */
-	case 0x92:   /* TODO: PU2 */
-	case 0x93:   /* TODO: STS */
-	case 0x94:   /* TODO: CCH */
-	case 0x95:   /* TODO: MW */
-	case 0x96:   /* TODO: SPA */
-	case 0x97:   /* TODO: EPA */
-	case 0x98:   /* TODO: SOS */
-	case 0x99:   /* TODO: SGCI */
-		break;
-	case 0x9a:   /* DECID -- Identify Terminal */
-		ttywrite(vtiden, strlen(vtiden), 0);
-		break;
-	case 0x9b:   /* TODO: CSI */
-	case 0x9c:   /* TODO: ST */
-		break;
-	case 0x90:   /* DCS -- Device Control String */
-	case 0x9d:   /* OSC -- Operating System Command */
-	case 0x9e:   /* PM -- Privacy Message */
-	case 0x9f:   /* APC -- Application Program Command */
-		tstrsequence(ascii);
-		return;
-	}
-	/* only CAN, SUB, \a and C1 chars interrupt a sequence */
-	term.esc &= ~(ESC_STR_END|ESC_STR);
-}
-
-/*
- * returns 1 when the sequence is finished and it hasn't to read
- * more characters for this sequence, otherwise 0
- */
-int
-eschandle(uchar ascii)
-{
-	switch (ascii) {
-	case '[':
-		term.esc |= ESC_CSI;
-		return 0;
-	case '#':
-		term.esc |= ESC_TEST;
-		return 0;
-	case '%':
-		term.esc |= ESC_UTF8;
-		return 0;
-	case 'P': /* DCS -- Device Control String */
-	case '_': /* APC -- Application Program Command */
-	case '^': /* PM -- Privacy Message */
-	case ']': /* OSC -- Operating System Command */
-	case 'k': /* old title set compatibility */
-		tstrsequence(ascii);
-		return 0;
-	case 'n': /* LS2 -- Locking shift 2 */
-	case 'o': /* LS3 -- Locking shift 3 */
-		term.charset = 2 + (ascii - 'n');
-		break;
-	case '(': /* GZD4 -- set primary charset G0 */
-	case ')': /* G1D4 -- set secondary charset G1 */
-	case '*': /* G2D4 -- set tertiary charset G2 */
-	case '+': /* G3D4 -- set quaternary charset G3 */
-		term.icharset = ascii - '(';
-		term.esc |= ESC_ALTCHARSET;
-		return 0;
-	case 'D': /* IND -- Linefeed */
-		if (term.c.y == term.bot) {
-			tscrollup(term.top, 1);
-		} else {
-			tmoveto(term.c.x, term.c.y+1);
-		}
-		break;
-	case 'E': /* NEL -- Next line */
-		tnewline(1); /* always go to first col */
-		break;
-	case 'H': /* HTS -- Horizontal tab stop */
-		term.tabs[term.c.x] = 1;
-		break;
-	case 'M': /* RI -- Reverse index */
-		if (term.c.y == term.top) {
-			tscrolldown(term.top, 1);
-		} else {
-			tmoveto(term.c.x, term.c.y-1);
-		}
-		break;
-	case 'Z': /* DECID -- Identify Terminal */
-		ttywrite(vtiden, strlen(vtiden), 0);
-		break;
-	case 'c': /* RIS -- Reset to initial state */
-		treset();
-		resettitle();
-		xloadcols();
-		break;
-	case '=': /* DECPAM -- Application keypad */
-		xsetmode(1, MODE_APPKEYPAD);
-		break;
-	case '>': /* DECPNM -- Normal keypad */
-		xsetmode(0, MODE_APPKEYPAD);
-		break;
-	case '7': /* DECSC -- Save Cursor */
-		tcursor(CURSOR_SAVE);
-		break;
-	case '8': /* DECRC -- Restore Cursor */
-		tcursor(CURSOR_LOAD);
-		break;
-	case '\\': /* ST -- String Terminator */
-		if (term.esc & ESC_STR_END)
-			strhandle();
-		break;
-	default:
-		fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
-			(uchar) ascii, isprint(ascii)? ascii:'.');
-		break;
-	}
-	return 1;
-}
-
-void
-tputc(Rune u)
-{
-	char c[UTF_SIZ];
-	int control;
-	int width, len;
-	Glyph *gp;
-
-	control = ISCONTROL(u);
-	if (u < 127 || !IS_SET(MODE_UTF8)) {
-		c[0] = u;
-		width = len = 1;
-	} else {
-		len = utf8encode(u, c);
-		if (!control && (width = wcwidth(u)) == -1)
-			width = 1;
-	}
-
-	if (IS_SET(MODE_PRINT))
-		tprinter(c, len);
-
-	/*
-	 * STR sequence must be checked before anything else
-	 * because it uses all following characters until it
-	 * receives a ESC, a SUB, a ST or any other C1 control
-	 * character.
-	 */
-	if (term.esc & ESC_STR) {
-		if (u == '\a' || u == 030 || u == 032 || u == 033 ||
-		   ISCONTROLC1(u)) {
-			term.esc &= ~(ESC_START|ESC_STR);
-			term.esc |= ESC_STR_END;
-			goto check_control_code;
-		}
-
-		if (strescseq.len+len >= strescseq.siz) {
-			/*
-			 * Here is a bug in terminals. If the user never sends
-			 * some code to stop the str or esc command, then st
-			 * will stop responding. But this is better than
-			 * silently failing with unknown characters. At least
-			 * then users will report back.
-			 *
-			 * In the case users ever get fixed, here is the code:
-			 */
-			/*
-			 * term.esc = 0;
-			 * strhandle();
-			 */
-			if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2)
-				return;
-			strescseq.siz *= 2;
-			strescseq.buf = xrealloc(strescseq.buf, strescseq.siz);
-		}
-
-		memmove(&strescseq.buf[strescseq.len], c, len);
-		strescseq.len += len;
-		return;
-	}
-
-check_control_code:
-	/*
-	 * Actions of control codes must be performed as soon they arrive
-	 * because they can be embedded inside a control sequence, and
-	 * they must not cause conflicts with sequences.
-	 */
-	if (control) {
-		tcontrolcode(u);
-		/*
-		 * control codes are not shown ever
-		 */
-		if (!term.esc)
-			term.lastc = 0;
-		return;
-	} else if (term.esc & ESC_START) {
-		if (term.esc & ESC_CSI) {
-			csiescseq.buf[csiescseq.len++] = u;
-			if (BETWEEN(u, 0x40, 0x7E)
-					|| csiescseq.len >= \
-					sizeof(csiescseq.buf)-1) {
-				term.esc = 0;
-				csiparse();
-				csihandle();
-			}
-			return;
-		} else if (term.esc & ESC_UTF8) {
-			tdefutf8(u);
-		} else if (term.esc & ESC_ALTCHARSET) {
-			tdeftran(u);
-		} else if (term.esc & ESC_TEST) {
-			tdectest(u);
-		} else {
-			if (!eschandle(u))
-				return;
-			/* sequence already finished */
-		}
-		term.esc = 0;
-		/*
-		 * All characters which form part of a sequence are not
-		 * printed
-		 */
-		return;
-	}
-	if (selected(term.c.x, term.c.y))
-		selclear();
-
-	gp = &term.line[term.c.y][term.c.x];
-	if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
-		gp->mode |= ATTR_WRAP;
-		tnewline(1);
-		gp = &term.line[term.c.y][term.c.x];
-	}
-
-	if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
-		memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
-
-	if (term.c.x+width > term.col) {
-		tnewline(1);
-		gp = &term.line[term.c.y][term.c.x];
-	}
-
-	tsetchar(u, &term.c.attr, term.c.x, term.c.y);
-	term.lastc = u;
-
-	if (width == 2) {
-		gp->mode |= ATTR_WIDE;
-		if (term.c.x+1 < term.col) {
-			gp[1].u = '\0';
-			gp[1].mode = ATTR_WDUMMY;
-		}
-	}
-	if (term.c.x+width < term.col) {
-		tmoveto(term.c.x+width, term.c.y);
-	} else {
-		term.c.state |= CURSOR_WRAPNEXT;
-	}
-}
-
-int
-twrite(const char *buf, int buflen, int show_ctrl)
-{
-	int charsize;
-	Rune u;
-	int n;
-
-	for (n = 0; n < buflen; n += charsize) {
-		if (IS_SET(MODE_UTF8)) {
-			/* process a complete utf8 char */
-			charsize = utf8decode(buf + n, &u, buflen - n);
-			if (charsize == 0)
-				break;
-		} else {
-			u = buf[n] & 0xFF;
-			charsize = 1;
-		}
-		if (show_ctrl && ISCONTROL(u)) {
-			if (u & 0x80) {
-				u &= 0x7f;
-				tputc('^');
-				tputc('[');
-			} else if (u != '\n' && u != '\r' && u != '\t') {
-				u ^= 0x40;
-				tputc('^');
-			}
-		}
-		tputc(u);
-	}
-	return n;
-}
-
-void
-tresize(int col, int row)
-{
-	int i;
-	int minrow = MIN(row, term.row);
-	int mincol = MIN(col, term.col);
-	int *bp;
-	TCursor c;
-
-	if (col < 1 || row < 1) {
-		fprintf(stderr,
-		        "tresize: error resizing to %dx%d\n", col, row);
-		return;
-	}
-
-	/*
-	 * slide screen to keep cursor where we expect it -
-	 * tscrollup would work here, but we can optimize to
-	 * memmove because we're freeing the earlier lines
-	 */
-	for (i = 0; i <= term.c.y - row; i++) {
-		free(term.line[i]);
-		free(term.alt[i]);
-	}
-	/* ensure that both src and dst are not NULL */
-	if (i > 0) {
-		memmove(term.line, term.line + i, row * sizeof(Line));
-		memmove(term.alt, term.alt + i, row * sizeof(Line));
-	}
-	for (i += row; i < term.row; i++) {
-		free(term.line[i]);
-		free(term.alt[i]);
-	}
-
-	/* resize to new height */
-	term.line = xrealloc(term.line, row * sizeof(Line));
-	term.alt  = xrealloc(term.alt,  row * sizeof(Line));
-	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
-	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
-
-	/* resize each row to new width, zero-pad if needed */
-	for (i = 0; i < minrow; i++) {
-		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
-		term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
-	}
-
-	/* allocate any new rows */
-	for (/* i = minrow */; i < row; i++) {
-		term.line[i] = xmalloc(col * sizeof(Glyph));
-		term.alt[i] = xmalloc(col * sizeof(Glyph));
-	}
-	if (col > term.col) {
-		bp = term.tabs + term.col;
-
-		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
-		while (--bp > term.tabs && !*bp)
-			/* nothing */ ;
-		for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
-			*bp = 1;
-	}
-	/* update terminal size */
-	term.col = col;
-	term.row = row;
-	/* reset scrolling region */
-	tsetscroll(0, row-1);
-	/* make use of the LIMIT in tmoveto */
-	tmoveto(term.c.x, term.c.y);
-	/* Clearing both screens (it makes dirty all lines) */
-	c = term.c;
-	for (i = 0; i < 2; i++) {
-		if (mincol < col && 0 < minrow) {
-			tclearregion(mincol, 0, col - 1, minrow - 1);
-		}
-		if (0 < col && minrow < row) {
-			tclearregion(0, minrow, col - 1, row - 1);
-		}
-		tswapscreen();
-		tcursor(CURSOR_LOAD);
-	}
-	term.c = c;
-}
-
-void
-resettitle(void)
-{
-	xsettitle(NULL);
-}
-
-void
-drawregion(int x1, int y1, int x2, int y2)
-{
-	int y;
-
-	for (y = y1; y < y2; y++) {
-		if (!term.dirty[y])
-			continue;
-
-		term.dirty[y] = 0;
-		xdrawline(term.line[y], x1, y, x2);
-	}
-}
-
-void
-draw(void)
-{
-	int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
-
-	if (!xstartdraw())
-		return;
-
-	/* adjust cursor position */
-	LIMIT(term.ocx, 0, term.col-1);
-	LIMIT(term.ocy, 0, term.row-1);
-	if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY)
-		term.ocx--;
-	if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
-		cx--;
-
-	drawregion(0, 0, term.col, term.row);
-	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-		term.ocx, term.ocy, term.line[term.ocy][term.ocx],
-		term.line[term.ocy], term.col);
-	term.ocx = cx;
-	term.ocy = term.c.y;
-	xfinishdraw();
-	if (ocx != term.ocx || ocy != term.ocy)
-		xximspot(term.ocx, term.ocy);
-}
-
-void
-redraw(void)
-{
-	tfulldirt();
-	draw();
-}
-- 
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