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ex_print.c

/*-
 * Copyright (c) 1992, 1993, 1994
 *    The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1992, 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[] = "@(#)ex_print.c    10.18 (Berkeley) 5/12/96";
#endif /* not lint */

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

#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>

#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

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

static int ex_prchars __P((SCR *, const char *, size_t *, size_t, u_int, int));

/*
 * ex_list -- :[line [,line]] l[ist] [count] [flags]
 *
 *    Display the addressed lines such that the output is unambiguous.
 *
 * PUBLIC: int ex_list __P((SCR *, EXCMD *));
 */
int
ex_list(sp, cmdp)
      SCR *sp;
      EXCMD *cmdp;
{
      if (ex_print(sp, cmdp,
          &cmdp->addr1, &cmdp->addr2, cmdp->iflags | E_C_LIST))
            return (1);
      sp->lno = cmdp->addr2.lno;
      sp->cno = cmdp->addr2.cno;
      return (0);
}

/*
 * ex_number -- :[line [,line]] nu[mber] [count] [flags]
 *
 *    Display the addressed lines with a leading line number.
 *
 * PUBLIC: int ex_number __P((SCR *, EXCMD *));
 */
int
ex_number(sp, cmdp)
      SCR *sp;
      EXCMD *cmdp;
{
      if (ex_print(sp, cmdp,
          &cmdp->addr1, &cmdp->addr2, cmdp->iflags | E_C_HASH))
            return (1);
      sp->lno = cmdp->addr2.lno;
      sp->cno = cmdp->addr2.cno;
      return (0);
}

/*
 * ex_pr -- :[line [,line]] p[rint] [count] [flags]
 *
 *    Display the addressed lines.
 *
 * PUBLIC: int ex_pr __P((SCR *, EXCMD *));
 */
int
ex_pr(sp, cmdp)
      SCR *sp;
      EXCMD *cmdp;
{
      if (ex_print(sp, cmdp, &cmdp->addr1, &cmdp->addr2, cmdp->iflags))
            return (1);
      sp->lno = cmdp->addr2.lno;
      sp->cno = cmdp->addr2.cno;
      return (0);
}

/*
 * ex_print --
 *    Print the selected lines.
 *
 * PUBLIC: int ex_print __P((SCR *, EXCMD *, MARK *, MARK *, u_int32_t));
 */
int
ex_print(sp, cmdp, fp, tp, flags)
      SCR *sp;
      EXCMD *cmdp;
      MARK *fp, *tp;
      u_int32_t flags;
{
      GS *gp;
      recno_t from, to;
      size_t col, len;
      char *p, buf[10];

      NEEDFILE(sp, cmdp);

      gp = sp->gp;
      for (from = fp->lno, to = tp->lno; from <= to; ++from) {
            col = 0;

            /*
             * Display the line number.  The %6 format is specified
             * by POSIX 1003.2, and is almost certainly large enough.
             * Check, though, just in case.
             */
            if (LF_ISSET(E_C_HASH)) {
                  if (from <= 999999) {
                        snprintf(buf, sizeof(buf), "%6ld  ", from);
                        p = buf;
                  } else
                        p = "TOOBIG  ";
                  if (ex_prchars(sp, p, &col, 8, 0, 0))
                        return (1);
            }

            /*
             * Display the line.  The format for E_C_PRINT isn't very good,
             * especially in handling end-of-line tabs, but they're almost
             * backward compatible.
             */
            if (db_get(sp, from, DBG_FATAL, &p, &len))
                  return (1);

            if (len == 0 && !LF_ISSET(E_C_LIST))
                  (void)ex_puts(sp, "\n");
            else if (ex_ldisplay(sp, p, len, col, flags))
                  return (1);

            if (INTERRUPTED(sp))
                  break;
      }
      return (0);
}

/*
 * ex_ldisplay --
 *    Display a line without any preceding number.
 *
 * PUBLIC: int ex_ldisplay __P((SCR *, const char *, size_t, size_t, u_int));
 */
int
ex_ldisplay(sp, p, len, col, flags)
      SCR *sp;
      const char *p;
      size_t len, col;
      u_int flags;
{
      if (len > 0 && ex_prchars(sp, p, &col, len, LF_ISSET(E_C_LIST), 0))
            return (1);
      if (!INTERRUPTED(sp) && LF_ISSET(E_C_LIST)) {
            p = "$";
            if (ex_prchars(sp, p, &col, 1, LF_ISSET(E_C_LIST), 0))
                  return (1);
      }
      if (!INTERRUPTED(sp))
            (void)ex_puts(sp, "\n");
      return (0);
}

/*
 * ex_scprint --
 *    Display a line for the substitute with confirmation routine.
 *
 * PUBLIC: int ex_scprint __P((SCR *, MARK *, MARK *));
 */
int
ex_scprint(sp, fp, tp)
      SCR *sp;
      MARK *fp, *tp;
{
      const char *p;
      size_t col, len;

      col = 0;
      if (O_ISSET(sp, O_NUMBER)) {
            p = "        ";
            if (ex_prchars(sp, p, &col, 8, 0, 0))
                  return (1);
      }

      if (db_get(sp, fp->lno, DBG_FATAL, (char **)&p, &len))
            return (1);

      if (ex_prchars(sp, p, &col, fp->cno, 0, ' '))
            return (1);
      p += fp->cno;
      if (ex_prchars(sp,
          p, &col, tp->cno == fp->cno ? 1 : tp->cno - fp->cno, 0, '^'))
            return (1);
      if (INTERRUPTED(sp))
            return (1);
      p = "[ynq]";            /* XXX: should be msg_cat. */
      if (ex_prchars(sp, p, &col, 5, 0, 0))
            return (1);
      (void)ex_fflush(sp);
      return (0);
}

/*
 * ex_prchars --
 *    Local routine to dump characters to the screen.
 */
static int
ex_prchars(sp, p, colp, len, flags, repeatc)
      SCR *sp;
      const char *p;
      size_t *colp, len;
      u_int flags;
      int repeatc;
{
      CHAR_T ch, *kp;
      GS *gp;
      size_t col, tlen, ts;

      if (O_ISSET(sp, O_LIST))
            LF_SET(E_C_LIST);
      gp = sp->gp;
      ts = O_VAL(sp, O_TABSTOP);
      for (col = *colp; len--;)
            if ((ch = *p++) == '\t' && !LF_ISSET(E_C_LIST))
                  for (tlen = ts - col % ts;
                      col < sp->cols && tlen--; ++col) {
                        (void)ex_printf(sp,
                            "%c", repeatc ? repeatc : ' ');
                        if (INTERRUPTED(sp))
                              goto intr;
                  }
            else {
                  kp = KEY_NAME(sp, ch);
                  tlen = KEY_LEN(sp, ch);
                  if (!repeatc  && col + tlen < sp->cols) {
                        (void)ex_puts(sp, kp);
                        col += tlen;
                  } else
                        for (; tlen--; ++kp, ++col) {
                              if (col == sp->cols) {
                                    col = 0;
                                    (void)ex_puts(sp, "\n");
                              }
                              (void)ex_printf(sp,
                                  "%c", repeatc ? repeatc : *kp);
                              if (INTERRUPTED(sp))
                                    goto intr;
                        }
            }
intr: *colp = col;
      return (0);
}

/*
 * ex_printf --
 *    Ex's version of printf.
 *
 * PUBLIC: int ex_printf __P((SCR *, const char *, ...));
 */
int
#ifdef __STDC__
ex_printf(SCR *sp, const char *fmt, ...)
#else
ex_printf(sp, fmt, va_alist)
      SCR *sp;
      const char *fmt;
      va_dcl
#endif
{
      EX_PRIVATE *exp;
      va_list ap;
      size_t n;

      exp = EXP(sp);

#ifdef __STDC__
      va_start(ap, fmt);
#else
      va_start(ap);
#endif
      exp->obp_len += n = vsnprintf(exp->obp + exp->obp_len,
          sizeof(exp->obp) - exp->obp_len, fmt, ap);
      va_end(ap);

      /* Flush when reach a <newline> or half the buffer. */
      if (exp->obp[exp->obp_len - 1] == '\n' ||
          exp->obp_len > sizeof(exp->obp) / 2)
            (void)ex_fflush(sp);
      return (n);
}

/*
 * ex_puts --
 *    Ex's version of puts.
 *
 * PUBLIC: int ex_puts __P((SCR *, const char *));
 */
int
ex_puts(sp, str)
      SCR *sp;
      const char *str;
{
      EX_PRIVATE *exp;
      int doflush, n;

      exp = EXP(sp);

      /* Flush when reach a <newline> or the end of the buffer. */
      for (doflush = n = 0; *str != '\0'; ++n) {
            if (exp->obp_len > sizeof(exp->obp))
                  (void)ex_fflush(sp);
            if ((exp->obp[exp->obp_len++] = *str++) == '\n')
                  doflush = 1;
      }
      if (doflush)
            (void)ex_fflush(sp);
      return (n);
}

/*
 * ex_fflush --
 *    Ex's version of fflush.
 *
 * PUBLIC: int ex_fflush __P((SCR *sp));
 */
int
ex_fflush(sp)
      SCR *sp;
{
      EX_PRIVATE *exp;

      exp = EXP(sp);

      if (exp->obp_len != 0) {
            sp->gp->scr_msg(sp, M_NONE, exp->obp, exp->obp_len);
            exp->obp_len = 0;
      }
      return (0);
}

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