tools/llvm: Do not build with symbols

[minix3.git] / external / bsd / nvi / dist / cl / cl_term.c

/*      $NetBSD: cl_term.c,v 1.3 2013/11/25 22:43:46 christos Exp $ */
/*-
 * Copyright (c) 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1993, 1994, 1995, 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "Id: cl_term.c,v 10.31 2001/07/08 13:06:56 skimo Exp  (Berkeley) Date: 2001/07/08 13:06:56 ";
#endif /* not lint */

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/stat.h>

#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include "../common/common.h"
#include "cl.h"

static int cl_pfmap __P((SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t));

/*
 * XXX
 * THIS REQUIRES THAT ALL SCREENS SHARE A TERMINAL TYPE.
 */
typedef struct _tklist {
        const char      *ts;            /* Key's termcap string. */
        const char      *output;        /* Corresponding vi command. */
        const char      *name;          /* Name. */
        u_char   value;                 /* Special value (for lookup). */
} TKLIST;

#define TKINIT(a, b, c) { a, b, c, 0 }

static TKLIST const c_tklist[] = {      /* Command mappings. */
        TKINIT("kil1",  "O",    "insert line"),
        TKINIT("kdch1", "x",    "delete character"),
        TKINIT("kcud1", "j",    "cursor down"),
        TKINIT("kel",   "D",    "delete to eol"),
        TKINIT("kind",  "\004", "scroll down"),                 /* ^D */
        TKINIT("kll",   "$",    "go to eol"),
        TKINIT("kend",  "$",    "go to eol"),
        TKINIT("khome", "^",    "go to sol"),
        TKINIT("kich1", "i",    "insert at cursor"),
        TKINIT("kdl1",  "dd",   "delete line"),
        TKINIT("kcub1", "h",    "cursor left"),
        TKINIT("knp",   "\006", "page down"),                   /* ^F */
        TKINIT("kpp",   "\002", "page up"),                     /* ^B */
        TKINIT("kri",   "\025", "scroll up"),                   /* ^U */
        TKINIT("ked",   "dG",   "delete to end of screen"),
        TKINIT("kcuf1", "l",    "cursor right"),
        TKINIT("kcuu1", "k",    "cursor up"),
        TKINIT(NULL, NULL, NULL),
};
static TKLIST const m1_tklist[] = {     /* Input mappings (lookup). */
        TKINIT(NULL, NULL, NULL),
};
static TKLIST const m2_tklist[] = {     /* Input mappings (set or delete). */
        TKINIT("kcud1",  "\033ja",      "cursor down"),         /* ^[ja */
        TKINIT("kcub1",  "\033ha",      "cursor left"),         /* ^[ha */
        TKINIT("kcuu1",  "\033ka",      "cursor up"),           /* ^[ka */
        TKINIT("kcuf1",  "\033la",      "cursor right"),        /* ^[la */
        TKINIT(NULL, NULL, NULL),
};

/*
 * cl_term_init --
 *      Initialize the special keys defined by the termcap/terminfo entry.
 *
 * PUBLIC: int cl_term_init __P((SCR *));
 */
int
cl_term_init(SCR *sp)
{
        KEYLIST *kp;
        SEQ *qp;
        TKLIST const *tkp;
        char *t;
        CHAR_T name[60];
        CHAR_T output[5];
        CHAR_T ts[20];
        const CHAR_T *wp;
        size_t wlen;

        /* Command mappings. */
        for (tkp = c_tklist; tkp->name != NULL; ++tkp) {
                if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
                        continue;
                CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
                MEMCPYW(name, wp, wlen);
                CHAR2INT(sp, t, strlen(t), wp, wlen);
                MEMCPYW(ts, wp, wlen);
                CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
                MEMCPYW(output, wp, wlen);
                if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
                    output, strlen(tkp->output), SEQ_COMMAND,
                    SEQ_NOOVERWRITE | SEQ_SCREEN))
                        return (1);
        }

        /* Input mappings needing to be looked up. */
        for (tkp = m1_tklist; tkp->name != NULL; ++tkp) {
                if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
                        continue;
                for (kp = keylist;; ++kp)
                        if (kp->value == tkp->value)
                                break;
                if (kp == NULL)
                        continue;
                CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
                MEMCPYW(name, wp, wlen);
                CHAR2INT(sp, t, strlen(t), wp, wlen);
                MEMCPYW(ts, wp, wlen);
                output[0] = (UCHAR_T)kp->ch;
                if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
                    output, 1, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
                        return (1);
        }

        /* Input mappings that are already set or are text deletions. */
        for (tkp = m2_tklist; tkp->name != NULL; ++tkp) {
                if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
                        continue;
                /*
                 * !!!
                 * Some terminals' <cursor_left> keys send single <backspace>
                 * characters.  This is okay in command mapping, but not okay
                 * in input mapping.  That combination is the only one we'll
                 * ever see, hopefully, so kluge it here for now.
                 */
                if (!strcmp(t, "\b"))
                        continue;
                if (tkp->output == NULL) {
                        CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
                        MEMCPYW(name, wp, wlen);
                        CHAR2INT(sp, t, strlen(t), wp, wlen);
                        MEMCPYW(ts, wp, wlen);
                        if (seq_set(sp, name, strlen(tkp->name),
                            ts, strlen(t), NULL, 0,
                            SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
                                return (1);
                } else {
                        CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
                        MEMCPYW(name, wp, wlen);
                        CHAR2INT(sp, t, strlen(t), wp, wlen);
                        MEMCPYW(ts, wp, wlen);
                        CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
                        MEMCPYW(output, wp, wlen);
                        if (seq_set(sp, name, strlen(tkp->name),
                            ts, strlen(t), output, strlen(tkp->output),
                            SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
                                return (1);
                }
        }

        /*
         * Rework any function key mappings that were set before the
         * screen was initialized.
         */
        LIST_FOREACH(qp, &sp->gp->seqq, q)
                if (F_ISSET(qp, SEQ_FUNCMAP))
                        (void)cl_pfmap(sp, qp->stype,
                            qp->input, qp->ilen, qp->output, qp->olen);
        return (0);
}

/*
 * cl_term_end --
 *      End the special keys defined by the termcap/terminfo entry.
 *
 * PUBLIC: int cl_term_end __P((GS *));
 */
int
cl_term_end(GS *gp)
{
        SEQ *qp, *nqp;

        /* Delete screen specific mappings. */
        LIST_FOREACH_SAFE(qp, &gp->seqq, q, nqp)
                if (F_ISSET(qp, SEQ_SCREEN))
                        (void)seq_mdel(qp);
        return (0);
}

/*
 * cl_fmap --
 *      Map a function key.
 *
 * PUBLIC: int cl_fmap __P((SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t));
 */
int
cl_fmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
{
        /* Ignore until the screen is running, do the real work then. */
        if (F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_SCR_VI))
                return (0);
        if (F_ISSET(sp, SC_EX) && !F_ISSET(sp, SC_SCR_EX))
                return (0);

        return (cl_pfmap(sp, stype, from, flen, to, tlen));
}

/*
 * cl_pfmap --
 *      Map a function key (private version).
 */
static int
cl_pfmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
{
        size_t nlen;
        char *p;
        char name[64];
        CHAR_T mykeyname[64];
        CHAR_T ts[20];
        const CHAR_T *wp;
        size_t wlen;

        (void)snprintf(name, sizeof(name), "kf%d", 
                        (int)STRTOL(from+1,NULL,10));
        if ((p = tigetstr(name)) == NULL ||
            p == (char *)-1 || strlen(p) == 0)
                p = NULL;
        if (p == NULL) {
                msgq_wstr(sp, M_ERR, from, "233|This terminal has no %s key");
                return (1);
        }

        nlen = SPRINTF(mykeyname,
            SIZE(mykeyname), L("function key %d"), 
                        (int)STRTOL(from+1,NULL,10));
        CHAR2INT(sp, p, strlen(p), wp, wlen);
        MEMCPYW(ts, wp, wlen);
        return (seq_set(sp, mykeyname, nlen,
            ts, strlen(p), to, tlen, stype, SEQ_NOOVERWRITE | SEQ_SCREEN));
}

/*
 * cl_optchange --
 *      Curses screen specific "option changed" routine.
 *
 * PUBLIC: int cl_optchange __P((SCR *, int, const char *, u_long *));
 */
int
cl_optchange(SCR *sp, int opt, const char *str, u_long *valp)
{
        CL_PRIVATE *clp;

        clp = CLP(sp);

        switch (opt) {
        case O_COLUMNS:
        case O_LINES:
        case O_TERM:
                /*
                 * Changing the columns, lines or terminal require that
                 * we restart the screen.
                 */
                F_SET(sp->gp, G_SRESTART);
                F_CLR(sp, SC_SCR_EX | SC_SCR_VI);
                break;
        case O_MESG:
                (void)cl_omesg(sp, clp, *valp);
                break;
        case O_WINDOWNAME:
                if (*valp) {
                        F_SET(clp, CL_RENAME_OK);

                        /*
                         * If the screen is live, i.e. we're not reading the
                         * .exrc file, update the window.
                         */
                        if (sp->frp != NULL && sp->frp->name != NULL)
                                (void)cl_rename(sp, sp->frp->name, 1);
                } else {
                        F_CLR(clp, CL_RENAME_OK);

                        (void)cl_rename(sp, NULL, 0);
                }
                break;
        }
        return (0);
}

/*
 * cl_omesg --
 *      Turn the tty write permission on or off.
 *
 * PUBLIC: int cl_omesg __P((SCR *, CL_PRIVATE *, int));
 */
int
cl_omesg(SCR *sp, CL_PRIVATE *clp, int on)
{
        struct stat sb;
        char *tty;

        /* Find the tty, get the current permissions. */
        if ((tty = ttyname(STDERR_FILENO)) == NULL) {
                if (sp != NULL)
                        msgq(sp, M_SYSERR, "stderr");
                return (1);
        }
        if (stat(tty, &sb) < 0) {
                if (sp != NULL)
                        msgq(sp, M_SYSERR, "%s", tty);
                return (1);
        }

        /* Save the original status if it's unknown. */
        if (clp->tgw == TGW_UNKNOWN)
                clp->tgw = sb.st_mode & S_IWGRP ? TGW_SET : TGW_UNSET;

        /* Toggle the permissions. */
        if (on) {
                if (chmod(tty, sb.st_mode | S_IWGRP) < 0) {
                        if (sp != NULL)
                                msgq(sp, M_SYSERR,
                                    "046|messages not turned on: %s", tty);
                        return (1);
                }
        } else
                if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) {
                        if (sp != NULL)
                                msgq(sp, M_SYSERR,
                                    "045|messages not turned off: %s", tty);
                        return (1);
                }
        return (0);
}

/*
 * cl_ssize --
 *      Return the terminal size.
 *
 * PUBLIC: int cl_ssize __P((SCR *, int, size_t *, size_t *, int *));
 */
int
cl_ssize(SCR *sp, int sigwinch, size_t *rowp, size_t *colp, int *changedp)
{
#ifdef TIOCGWINSZ
        struct winsize win;
#endif
        size_t col, row;
        int rval;
        char *p;

        /* Assume it's changed. */
        if (changedp != NULL)
                *changedp = 1;

        /*
         * !!!
         * sp may be NULL.
         *
         * Get the screen rows and columns.  If the values are wrong, it's
         * not a big deal -- as soon as the user sets them explicitly the
         * environment will be set and the screen package will use the new
         * values.
         *
         * Try TIOCGWINSZ.
         */
        row = col = 0;
#ifdef TIOCGWINSZ
        if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) {
                row = win.ws_row;
                col = win.ws_col;
        }
#endif
        /* If here because of suspend or a signal, only trust TIOCGWINSZ. */
        if (sigwinch) {
                /*
                 * Somebody didn't get TIOCGWINSZ right, or has suspend
                 * without window resizing support.  The user just lost,
                 * but there's nothing we can do.
                 */
                if (row == 0 || col == 0) {
                        if (changedp != NULL)
                                *changedp = 0;
                        return (0);
                }

                /*
                 * SunOS systems deliver SIGWINCH when windows are uncovered
                 * as well as when they change size.  In addition, we call
                 * here when continuing after being suspended since the window
                 * may have changed size.  Since we don't want to background
                 * all of the screens just because the window was uncovered,
                 * ignore the signal if there's no change.
                 */
                if (sp != NULL &&
                    row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS)) {
                        if (changedp != NULL)
                                *changedp = 0;
                        return (0);
                }

                if (rowp != NULL)
                        *rowp = row;
                if (colp != NULL)
                        *colp = col;
                resizeterm(row, col);
                return (0);
        }

        /*
         * !!!
         * If TIOCGWINSZ failed, or had entries of 0, try termcap.  This
         * routine is called before any termcap or terminal information
         * has been set up.  If there's no TERM environmental variable set,
         * let it go, at least ex can run.
         */
        if (row == 0 || col == 0) {
                if ((p = getenv("TERM")) == NULL)
                        goto noterm;
                if (row == 0) {
                        if ((rval = tigetnum("lines")) < 0)
                                msgq(sp, M_SYSERR, "tigetnum: lines");
                        else
                                row = rval;
                }
                if (col == 0) {
                        if ((rval = tigetnum("cols")) < 0)
                                msgq(sp, M_SYSERR, "tigetnum: cols");
                        else
                                col = rval;
                }
        }

        /* If nothing else, well, it's probably a VT100. */
noterm: if (row == 0)
                row = 24;
        if (col == 0)
                col = 80;

        /*
         * !!!
         * POSIX 1003.2 requires the environment to override everything.
         * Often, people can get nvi to stop messing up their screen by
         * deleting the LINES and COLUMNS environment variables from their
         * dot-files.
         */
        if ((p = getenv("LINES")) != NULL)
                row = strtol(p, NULL, 10);
        if ((p = getenv("COLUMNS")) != NULL)
                col = strtol(p, NULL, 10);

        if (rowp != NULL)
                *rowp = row;
        if (colp != NULL)
                *colp = col;
        return (0);
}

/*
 * cl_putchar --
 *      Function version of putchar, for tputs.
 *
 * PUBLIC: int cl_putchar __P((int));
 */
int
cl_putchar(int ch)
{
        return (putchar(ch));
}