/*
 * 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.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * mark.c: functions for setting marks and jumping to them
 */

#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <limits.h>

#include "nvim/vim.h"
#include "nvim/ascii.h"
#include "nvim/mark.h"
#include "nvim/buffer.h"
#include "nvim/charset.h"
#include "nvim/diff.h"
#include "nvim/eval.h"
#include "nvim/ex_cmds.h"
#include "nvim/fileio.h"
#include "nvim/fold.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/misc2.h"
#include "nvim/normal.h"
#include "nvim/option.h"
#include "nvim/path.h"
#include "nvim/quickfix.h"
#include "nvim/search.h"
#include "nvim/strings.h"
#include "nvim/ui.h"
#include "nvim/os/os.h"
#include "nvim/os/input.h"

/*
 * This file contains routines to maintain and manipulate marks.
 */

/*
 * If a named file mark's lnum is non-zero, it is valid.
 * If a named file mark's fnum is non-zero, it is for an existing buffer,
 * otherwise it is from .viminfo and namedfm[n].fname is the file name.
 * There are marks 'A - 'Z (set by user) and '0 to '9 (set when writing
 * viminfo).
 */
#define EXTRA_MARKS 10                                  /* marks 0-9 */
static xfmark_T namedfm[NMARKS + EXTRA_MARKS];          /* marks with file nr */


#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "mark.c.generated.h"
#endif
/*
 * Set named mark "c" at current cursor position.
 * Returns OK on success, FAIL if bad name given.
 */
int setmark(int c)
{
  return setmark_pos(c, &curwin->w_cursor, curbuf->b_fnum);
}

/*
 * Set named mark "c" to position "pos".
 * When "c" is upper case use file "fnum".
 * Returns OK on success, FAIL if bad name given.
 */
int setmark_pos(int c, pos_T *pos, int fnum)
{
  int i;

  /* Check for a special key (may cause islower() to crash). */
  if (c < 0)
    return FAIL;

  if (c == '\'' || c == '`') {
    if (pos == &curwin->w_cursor) {
      setpcmark();
      /* keep it even when the cursor doesn't move */
      curwin->w_prev_pcmark = curwin->w_pcmark;
    } else
      curwin->w_pcmark = *pos;
    return OK;
  }

  if (c == '"') {
    curbuf->b_last_cursor = *pos;
    return OK;
  }

  /* Allow setting '[ and '] for an autocommand that simulates reading a
   * file. */
  if (c == '[') {
    curbuf->b_op_start = *pos;
    return OK;
  }
  if (c == ']') {
    curbuf->b_op_end = *pos;
    return OK;
  }

  if (c == '<' || c == '>') {
    if (c == '<')
      curbuf->b_visual.vi_start = *pos;
    else
      curbuf->b_visual.vi_end = *pos;
    if (curbuf->b_visual.vi_mode == NUL)
      /* Visual_mode has not yet been set, use a sane default. */
      curbuf->b_visual.vi_mode = 'v';
    return OK;
  }

  if (c > 'z')              /* some islower() and isupper() cannot handle
                                characters above 127 */
    return FAIL;
  if (islower(c)) {
    i = c - 'a';
    curbuf->b_namedm[i] = *pos;
    return OK;
  }
  if (isupper(c)) {
    assert(c >= 'A' && c <= 'Z');
    i = c - 'A';
    namedfm[i].fmark.mark = *pos;
    namedfm[i].fmark.fnum = fnum;
    xfree(namedfm[i].fname);
    namedfm[i].fname = NULL;
    return OK;
  }
  return FAIL;
}

/*
 * Set the previous context mark to the current position and add it to the
 * jump list.
 */
void setpcmark(void)
{
  int i;
  xfmark_T    *fm;

  /* for :global the mark is set only once */
  if (global_busy || listcmd_busy || cmdmod.keepjumps)
    return;

  curwin->w_prev_pcmark = curwin->w_pcmark;
  curwin->w_pcmark = curwin->w_cursor;

  /* If jumplist is full: remove oldest entry */
  if (++curwin->w_jumplistlen > JUMPLISTSIZE) {
    curwin->w_jumplistlen = JUMPLISTSIZE;
    xfree(curwin->w_jumplist[0].fname);
    for (i = 1; i < JUMPLISTSIZE; ++i)
      curwin->w_jumplist[i - 1] = curwin->w_jumplist[i];
  }
  curwin->w_jumplistidx = curwin->w_jumplistlen;
  fm = &curwin->w_jumplist[curwin->w_jumplistlen - 1];

  fm->fmark.mark = curwin->w_pcmark;
  fm->fmark.fnum = curbuf->b_fnum;
  fm->fname = NULL;
}

/*
 * To change context, call setpcmark(), then move the current position to
 * where ever, then call checkpcmark().  This ensures that the previous
 * context will only be changed if the cursor moved to a different line.
 * If pcmark was deleted (with "dG") the previous mark is restored.
 */
void checkpcmark(void)
{
  if (curwin->w_prev_pcmark.lnum != 0
      && (equalpos(curwin->w_pcmark, curwin->w_cursor)
          || curwin->w_pcmark.lnum == 0)) {
    curwin->w_pcmark = curwin->w_prev_pcmark;
    curwin->w_prev_pcmark.lnum = 0;             /* Show it has been checked */
  }
}

/*
 * move "count" positions in the jump list (count may be negative)
 */
pos_T *movemark(int count)
{
  pos_T       *pos;
  xfmark_T    *jmp;

  cleanup_jumplist();

  if (curwin->w_jumplistlen == 0)           /* nothing to jump to */
    return (pos_T *)NULL;

  for (;; ) {
    if (curwin->w_jumplistidx + count < 0
        || curwin->w_jumplistidx + count >= curwin->w_jumplistlen)
      return (pos_T *)NULL;

    /*
     * if first CTRL-O or CTRL-I command after a jump, add cursor position
     * to list.  Careful: If there are duplicates (CTRL-O immediately after
     * starting Vim on a file), another entry may have been removed.
     */
    if (curwin->w_jumplistidx == curwin->w_jumplistlen) {
      setpcmark();
      --curwin->w_jumplistidx;          /* skip the new entry */
      if (curwin->w_jumplistidx + count < 0)
        return (pos_T *)NULL;
    }

    curwin->w_jumplistidx += count;

    jmp = curwin->w_jumplist + curwin->w_jumplistidx;
    if (jmp->fmark.fnum == 0)
      fname2fnum(jmp);
    if (jmp->fmark.fnum != curbuf->b_fnum) {
      /* jump to other file */
      if (buflist_findnr(jmp->fmark.fnum) == NULL) { /* Skip this one .. */
        count += count < 0 ? -1 : 1;
        continue;
      }
      if (buflist_getfile(jmp->fmark.fnum, jmp->fmark.mark.lnum,
              0, FALSE) == FAIL)
        return (pos_T *)NULL;
      /* Set lnum again, autocommands my have changed it */
      curwin->w_cursor = jmp->fmark.mark;
      pos = (pos_T *)-1;
    } else
      pos = &(jmp->fmark.mark);
    return pos;
  }
}

/*
 * Move "count" positions in the changelist (count may be negative).
 */
pos_T *movechangelist(int count)
{
  int n;

  if (curbuf->b_changelistlen == 0)         /* nothing to jump to */
    return (pos_T *)NULL;

  n = curwin->w_changelistidx;
  if (n + count < 0) {
    if (n == 0)
      return (pos_T *)NULL;
    n = 0;
  } else if (n + count >= curbuf->b_changelistlen) {
    if (n == curbuf->b_changelistlen - 1)
      return (pos_T *)NULL;
    n = curbuf->b_changelistlen - 1;
  } else
    n += count;
  curwin->w_changelistidx = n;
  return curbuf->b_changelist + n;
}

/*
 * Find mark "c" in buffer pointed to by "buf".
 * If "changefile" is TRUE it's allowed to edit another file for '0, 'A, etc.
 * If "fnum" is not NULL store the fnum there for '0, 'A etc., don't edit
 * another file.
 * Returns:
 * - pointer to pos_T if found.  lnum is 0 when mark not set, -1 when mark is
 *   in another file which can't be gotten. (caller needs to check lnum!)
 * - NULL if there is no mark called 'c'.
 * - -1 if mark is in other file and jumped there (only if changefile is TRUE)
 */
pos_T *getmark_buf(buf_T *buf, int c, int changefile)
{
  return getmark_buf_fnum(buf, c, changefile, NULL);
}

pos_T *getmark(int c, int changefile)
{
  return getmark_buf_fnum(curbuf, c, changefile, NULL);
}

pos_T *getmark_buf_fnum(buf_T *buf, int c, int changefile, int *fnum)
{
  pos_T               *posp;
  pos_T               *startp, *endp;
  static pos_T pos_copy;

  posp = NULL;

  /* Check for special key, can't be a mark name and might cause islower()
   * to crash. */
  if (c < 0)
    return posp;
  if (c > '~')                          /* check for islower()/isupper() */
    ;
  else if (c == '\'' || c == '`') {    /* previous context mark */
    pos_copy = curwin->w_pcmark;        /* need to make a copy because */
    posp = &pos_copy;                   /*   w_pcmark may be changed soon */
  } else if (c == '"')                  /* to pos when leaving buffer */
    posp = &(buf->b_last_cursor);
  else if (c == '^')                    /* to where Insert mode stopped */
    posp = &(buf->b_last_insert);
  else if (c == '.')                    /* to where last change was made */
    posp = &(buf->b_last_change);
  else if (c == '[')                    /* to start of previous operator */
    posp = &(buf->b_op_start);
  else if (c == ']')                    /* to end of previous operator */
    posp = &(buf->b_op_end);
  else if (c == '{' || c == '}') {      /* to previous/next paragraph */
    pos_T pos;
    oparg_T oa;
    int slcb = listcmd_busy;

    pos = curwin->w_cursor;
    listcmd_busy = TRUE;            /* avoid that '' is changed */
    if (findpar(&oa.inclusive,
            c == '}' ? FORWARD : BACKWARD, 1L, NUL, FALSE)) {
      pos_copy = curwin->w_cursor;
      posp = &pos_copy;
    }
    curwin->w_cursor = pos;
    listcmd_busy = slcb;
  } else if (c == '(' || c == ')') {  /* to previous/next sentence */
    pos_T pos;
    int slcb = listcmd_busy;

    pos = curwin->w_cursor;
    listcmd_busy = TRUE;            /* avoid that '' is changed */
    if (findsent(c == ')' ? FORWARD : BACKWARD, 1L)) {
      pos_copy = curwin->w_cursor;
      posp = &pos_copy;
    }
    curwin->w_cursor = pos;
    listcmd_busy = slcb;
  } else if (c == '<' || c == '>') {  /* start/end of visual area */
    startp = &buf->b_visual.vi_start;
    endp = &buf->b_visual.vi_end;
    if ((c == '<') == lt(*startp, *endp))
      posp = startp;
    else
      posp = endp;
    /*
     * For Visual line mode, set mark at begin or end of line
     */
    if (buf->b_visual.vi_mode == 'V') {
      pos_copy = *posp;
      posp = &pos_copy;
      if (c == '<')
        pos_copy.col = 0;
      else
        pos_copy.col = MAXCOL;
      pos_copy.coladd = 0;
    }
  } else if (ASCII_ISLOWER(c)) {      /* normal named mark */
    posp = &(buf->b_namedm[c - 'a']);
  } else if (ASCII_ISUPPER(c) || ascii_isdigit(c)) {    /* named file mark */
    if (ascii_isdigit(c))
      c = c - '0' + NMARKS;
    else
      c -= 'A';
    posp = &(namedfm[c].fmark.mark);

    if (namedfm[c].fmark.fnum == 0)
      fname2fnum(&namedfm[c]);

    if (fnum != NULL)
      *fnum = namedfm[c].fmark.fnum;
    else if (namedfm[c].fmark.fnum != buf->b_fnum) {
      /* mark is in another file */
      posp = &pos_copy;

      if (namedfm[c].fmark.mark.lnum != 0
          && changefile && namedfm[c].fmark.fnum) {
        if (buflist_getfile(namedfm[c].fmark.fnum,
                (linenr_T)1, GETF_SETMARK, FALSE) == OK) {
          /* Set the lnum now, autocommands could have changed it */
          curwin->w_cursor = namedfm[c].fmark.mark;
          return (pos_T *)-1;
        }
        pos_copy.lnum = -1;             /* can't get file */
      } else
        pos_copy.lnum = 0;              /* mark exists, but is not valid in
                                           current buffer */
    }
  }

  return posp;
}

/*
 * Search for the next named mark in the current file.
 *
 * Returns pointer to pos_T of the next mark or NULL if no mark is found.
 */
pos_T *
getnextmark (
    pos_T *startpos,          /* where to start */
    int dir,                /* direction for search */
    int begin_line
)
{
  int i;
  pos_T       *result = NULL;
  pos_T pos;

  pos = *startpos;

  /* When searching backward and leaving the cursor on the first non-blank,
   * position must be in a previous line.
   * When searching forward and leaving the cursor on the first non-blank,
   * position must be in a next line. */
  if (dir == BACKWARD && begin_line)
    pos.col = 0;
  else if (dir == FORWARD && begin_line)
    pos.col = MAXCOL;

  for (i = 0; i < NMARKS; i++) {
    if (curbuf->b_namedm[i].lnum > 0) {
      if (dir == FORWARD) {
        if ((result == NULL || lt(curbuf->b_namedm[i], *result))
            && lt(pos, curbuf->b_namedm[i]))
          result = &curbuf->b_namedm[i];
      } else {
        if ((result == NULL || lt(*result, curbuf->b_namedm[i]))
            && lt(curbuf->b_namedm[i], pos))
          result = &curbuf->b_namedm[i];
      }
    }
  }

  return result;
}

/*
 * For an xtended filemark: set the fnum from the fname.
 * This is used for marks obtained from the .viminfo file.  It's postponed
 * until the mark is used to avoid a long startup delay.
 */
static void fname2fnum(xfmark_T *fm)
{
  char_u      *p;

  if (fm->fname != NULL) {
    /*
     * First expand "~/" in the file name to the home directory.
     * Don't expand the whole name, it may contain other '~' chars.
     */
    if (fm->fname[0] == '~' && (fm->fname[1] == '/'
#ifdef BACKSLASH_IN_FILENAME
                                || fm->fname[1] == '\\'
#endif
                                )) {
      int len;

      expand_env((char_u *)"~/", NameBuff, MAXPATHL);
      len = (int)STRLEN(NameBuff);
      STRLCPY(NameBuff + len, fm->fname + 2, MAXPATHL - len);
    } else
      STRLCPY(NameBuff, fm->fname, MAXPATHL);

    /* Try to shorten the file name. */
    os_dirname(IObuff, IOSIZE);
    p = path_shorten_fname(NameBuff, IObuff);

    /* buflist_new() will call fmarks_check_names() */
    (void)buflist_new(NameBuff, p, (linenr_T)1, 0);
  }
}

/*
 * Check all file marks for a name that matches the file name in buf.
 * May replace the name with an fnum.
 * Used for marks that come from the .viminfo file.
 */
void fmarks_check_names(buf_T *buf)
{
  char_u      *name;
  int i;

  if (buf->b_ffname == NULL)
    return;

  name = home_replace_save(buf, buf->b_ffname);

  for (i = 0; i < NMARKS + EXTRA_MARKS; ++i)
    fmarks_check_one(&namedfm[i], name, buf);

  FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
    for (i = 0; i < wp->w_jumplistlen; ++i) {
      fmarks_check_one(&wp->w_jumplist[i], name, buf);
    }
  }

  xfree(name);
}

static void fmarks_check_one(xfmark_T *fm, char_u *name, buf_T *buf)
{
  if (fm->fmark.fnum == 0
      && fm->fname != NULL
      && fnamecmp(name, fm->fname) == 0) {
    fm->fmark.fnum = buf->b_fnum;
    xfree(fm->fname);
    fm->fname = NULL;
  }
}

/*
 * Check a if a position from a mark is valid.
 * Give and error message and return FAIL if not.
 */
int check_mark(pos_T *pos)
{
  if (pos == NULL) {
    EMSG(_(e_umark));
    return FAIL;
  }
  if (pos->lnum <= 0) {
    /* lnum is negative if mark is in another file can can't get that
     * file, error message already give then. */
    if (pos->lnum == 0)
      EMSG(_(e_marknotset));
    return FAIL;
  }
  if (pos->lnum > curbuf->b_ml.ml_line_count) {
    EMSG(_(e_markinval));
    return FAIL;
  }
  return OK;
}

/*
 * clrallmarks() - clear all marks in the buffer 'buf'
 *
 * Used mainly when trashing the entire buffer during ":e" type commands
 */
void clrallmarks(buf_T *buf)
{
  static int i = -1;

  if (i == -1)          /* first call ever: initialize */
    for (i = 0; i < NMARKS + 1; i++) {
      namedfm[i].fmark.mark.lnum = 0;
      namedfm[i].fname = NULL;
    }

  for (i = 0; i < NMARKS; i++)
    buf->b_namedm[i].lnum = 0;
  buf->b_op_start.lnum = 0;             /* start/end op mark cleared */
  buf->b_op_end.lnum = 0;
  buf->b_last_cursor.lnum = 1;          /* '" mark cleared */
  buf->b_last_cursor.col = 0;
  buf->b_last_cursor.coladd = 0;
  buf->b_last_insert.lnum = 0;          /* '^ mark cleared */
  buf->b_last_change.lnum = 0;          /* '. mark cleared */
  buf->b_changelistlen = 0;
}

/*
 * Get name of file from a filemark.
 * When it's in the current buffer, return the text at the mark.
 * Returns an allocated string.
 */
char_u *fm_getname(fmark_T *fmark, int lead_len)
{
  if (fmark->fnum == curbuf->b_fnum)                /* current buffer */
    return mark_line(&(fmark->mark), lead_len);
  return buflist_nr2name(fmark->fnum, FALSE, TRUE);
}

/*
 * Return the line at mark "mp".  Truncate to fit in window.
 * The returned string has been allocated.
 */
static char_u *mark_line(pos_T *mp, int lead_len)
{
  char_u      *s, *p;
  int len;

  if (mp->lnum == 0 || mp->lnum > curbuf->b_ml.ml_line_count)
    return vim_strsave((char_u *)"-invalid-");
  assert(Columns >= 0 && (size_t)Columns <= SIZE_MAX);
  s = vim_strnsave(skipwhite(ml_get(mp->lnum)), (size_t)Columns);

  /* Truncate the line to fit it in the window */
  len = 0;
  for (p = s; *p != NUL; mb_ptr_adv(p)) {
    len += ptr2cells(p);
    if (len >= Columns - lead_len)
      break;
  }
  *p = NUL;
  return s;
}

/*
 * print the marks
 */
void do_marks(exarg_T *eap)
{
  char_u      *arg = eap->arg;
  int i;
  char_u      *name;

  if (arg != NULL && *arg == NUL)
    arg = NULL;

  show_one_mark('\'', arg, &curwin->w_pcmark, NULL, TRUE);
  for (i = 0; i < NMARKS; ++i)
    show_one_mark(i + 'a', arg, &curbuf->b_namedm[i], NULL, TRUE);
  for (i = 0; i < NMARKS + EXTRA_MARKS; ++i) {
    if (namedfm[i].fmark.fnum != 0)
      name = fm_getname(&namedfm[i].fmark, 15);
    else
      name = namedfm[i].fname;
    if (name != NULL) {
      show_one_mark(i >= NMARKS ? i - NMARKS + '0' : i + 'A',
          arg, &namedfm[i].fmark.mark, name,
          namedfm[i].fmark.fnum == curbuf->b_fnum);
      if (namedfm[i].fmark.fnum != 0)
        xfree(name);
    }
  }
  show_one_mark('"', arg, &curbuf->b_last_cursor, NULL, TRUE);
  show_one_mark('[', arg, &curbuf->b_op_start, NULL, TRUE);
  show_one_mark(']', arg, &curbuf->b_op_end, NULL, TRUE);
  show_one_mark('^', arg, &curbuf->b_last_insert, NULL, TRUE);
  show_one_mark('.', arg, &curbuf->b_last_change, NULL, TRUE);
  show_one_mark('<', arg, &curbuf->b_visual.vi_start, NULL, TRUE);
  show_one_mark('>', arg, &curbuf->b_visual.vi_end, NULL, TRUE);
  show_one_mark(-1, arg, NULL, NULL, FALSE);
}

static void 
show_one_mark (
    int c,
    char_u *arg,
    pos_T *p,
    char_u *name,
    int current                    /* in current file */
)
{
  static int did_title = FALSE;
  int mustfree = FALSE;

  if (c == -1) {                            /* finish up */
    if (did_title)
      did_title = FALSE;
    else {
      if (arg == NULL)
        MSG(_("No marks set"));
      else
        EMSG2(_("E283: No marks matching \"%s\""), arg);
    }
  }
  /* don't output anything if 'q' typed at --more-- prompt */
  else if (!got_int
           && (arg == NULL || vim_strchr(arg, c) != NULL)
           && p->lnum != 0) {
    if (!did_title) {
      /* Highlight title */
      MSG_PUTS_TITLE(_("\nmark line  col file/text"));
      did_title = TRUE;
    }
    msg_putchar('\n');
    if (!got_int) {
      sprintf((char *)IObuff, " %c %6ld %4d ", c, p->lnum, p->col);
      msg_outtrans(IObuff);
      if (name == NULL && current) {
        name = mark_line(p, 15);
        mustfree = TRUE;
      }
      if (name != NULL) {
        msg_outtrans_attr(name, current ? hl_attr(HLF_D) : 0);
        if (mustfree)
          xfree(name);
      }
    }
    ui_flush();                    /* show one line at a time */
  }
}

/*
 * ":delmarks[!] [marks]"
 */
void ex_delmarks(exarg_T *eap)
{
  char_u      *p;
  int from, to;
  int i;
  int lower;
  int digit;
  int n;

  if (*eap->arg == NUL && eap->forceit)
    /* clear all marks */
    clrallmarks(curbuf);
  else if (eap->forceit)
    EMSG(_(e_invarg));
  else if (*eap->arg == NUL)
    EMSG(_(e_argreq));
  else {
    /* clear specified marks only */
    for (p = eap->arg; *p != NUL; ++p) {
      lower = ASCII_ISLOWER(*p);
      digit = ascii_isdigit(*p);
      if (lower || digit || ASCII_ISUPPER(*p)) {
        if (p[1] == '-') {
          /* clear range of marks */
          from = *p;
          to = p[2];
          if (!(lower ? ASCII_ISLOWER(p[2])
                : (digit ? ascii_isdigit(p[2])
                   : ASCII_ISUPPER(p[2])))
              || to < from) {
            EMSG2(_(e_invarg2), p);
            return;
          }
          p += 2;
        } else
          /* clear one lower case mark */
          from = to = *p;

        for (i = from; i <= to; ++i) {
          if (lower)
            curbuf->b_namedm[i - 'a'].lnum = 0;
          else {
            if (digit)
              n = i - '0' + NMARKS;
            else
              n = i - 'A';
            namedfm[n].fmark.mark.lnum = 0;
            xfree(namedfm[n].fname);
            namedfm[n].fname = NULL;
          }
        }
      } else
        switch (*p) {
        case '"': curbuf->b_last_cursor.lnum = 0; break;
        case '^': curbuf->b_last_insert.lnum = 0; break;
        case '.': curbuf->b_last_change.lnum = 0; break;
        case '[': curbuf->b_op_start.lnum    = 0; break;
        case ']': curbuf->b_op_end.lnum      = 0; break;
        case '<': curbuf->b_visual.vi_start.lnum = 0; break;
        case '>': curbuf->b_visual.vi_end.lnum   = 0; break;
        case ' ': break;
        default:  EMSG2(_(e_invarg2), p);
          return;
        }
    }
  }
}

/*
 * print the jumplist
 */
void ex_jumps(exarg_T *eap)
{
  int i;
  char_u      *name;

  cleanup_jumplist();
  /* Highlight title */
  MSG_PUTS_TITLE(_("\n jump line  col file/text"));
  for (i = 0; i < curwin->w_jumplistlen && !got_int; ++i) {
    if (curwin->w_jumplist[i].fmark.mark.lnum != 0) {
      if (curwin->w_jumplist[i].fmark.fnum == 0)
        fname2fnum(&curwin->w_jumplist[i]);
      name = fm_getname(&curwin->w_jumplist[i].fmark, 16);
      if (name == NULL)             /* file name not available */
        continue;

      msg_putchar('\n');
      if (got_int) {
        xfree(name);
        break;
      }
      sprintf((char *)IObuff, "%c %2d %5ld %4d ",
          i == curwin->w_jumplistidx ? '>' : ' ',
          i > curwin->w_jumplistidx ? i - curwin->w_jumplistidx
          : curwin->w_jumplistidx - i,
          curwin->w_jumplist[i].fmark.mark.lnum,
          curwin->w_jumplist[i].fmark.mark.col);
      msg_outtrans(IObuff);
      msg_outtrans_attr(name,
          curwin->w_jumplist[i].fmark.fnum == curbuf->b_fnum
          ? hl_attr(HLF_D) : 0);
      xfree(name);
      os_breakcheck();
    }
    ui_flush();
  }
  if (curwin->w_jumplistidx == curwin->w_jumplistlen)
    MSG_PUTS("\n>");
}

/*
 * print the changelist
 */
void ex_changes(exarg_T *eap)
{
  int i;
  char_u      *name;

  /* Highlight title */
  MSG_PUTS_TITLE(_("\nchange line  col text"));

  for (i = 0; i < curbuf->b_changelistlen && !got_int; ++i) {
    if (curbuf->b_changelist[i].lnum != 0) {
      msg_putchar('\n');
      if (got_int)
        break;
      sprintf((char *)IObuff, "%c %3d %5ld %4d ",
          i == curwin->w_changelistidx ? '>' : ' ',
          i > curwin->w_changelistidx ? i - curwin->w_changelistidx
          : curwin->w_changelistidx - i,
          (long)curbuf->b_changelist[i].lnum,
          curbuf->b_changelist[i].col);
      msg_outtrans(IObuff);
      name = mark_line(&curbuf->b_changelist[i], 17);
      msg_outtrans_attr(name, hl_attr(HLF_D));
      xfree(name);
      os_breakcheck();
    }
    ui_flush();
  }
  if (curwin->w_changelistidx == curbuf->b_changelistlen)
    MSG_PUTS("\n>");
}

#define one_adjust(add) \
  { \
    lp = add; \
    if (*lp >= line1 && *lp <= line2) \
    { \
      if (amount == MAXLNUM) \
        *lp = 0; \
      else \
        *lp += amount; \
    } \
    else if (amount_after && *lp > line2) \
      *lp += amount_after; \
  }

/* don't delete the line, just put at first deleted line */
#define one_adjust_nodel(add) \
  { \
    lp = add; \
    if (*lp >= line1 && *lp <= line2) \
    { \
      if (amount == MAXLNUM) \
        *lp = line1; \
      else \
        *lp += amount; \
    } \
    else if (amount_after && *lp > line2) \
      *lp += amount_after; \
  }

/*
 * Adjust marks between line1 and line2 (inclusive) to move 'amount' lines.
 * Must be called before changed_*(), appended_lines() or deleted_lines().
 * May be called before or after changing the text.
 * When deleting lines line1 to line2, use an 'amount' of MAXLNUM: The marks
 * within this range are made invalid.
 * If 'amount_after' is non-zero adjust marks after line2.
 * Example: Delete lines 34 and 35: mark_adjust(34, 35, MAXLNUM, -2);
 * Example: Insert two lines below 55: mark_adjust(56, MAXLNUM, 2, 0);
 *				   or: mark_adjust(56, 55, MAXLNUM, 2);
 */
void mark_adjust(linenr_T line1, linenr_T line2, long amount, long amount_after)
{
  int i;
  int fnum = curbuf->b_fnum;
  linenr_T    *lp;
  static pos_T initpos = INIT_POS_T(1, 0, 0);

  if (line2 < line1 && amount_after == 0L)          /* nothing to do */
    return;

  if (!cmdmod.lockmarks) {
    /* named marks, lower case and upper case */
    for (i = 0; i < NMARKS; i++) {
      one_adjust(&(curbuf->b_namedm[i].lnum));
      if (namedfm[i].fmark.fnum == fnum)
        one_adjust_nodel(&(namedfm[i].fmark.mark.lnum));
    }
    for (i = NMARKS; i < NMARKS + EXTRA_MARKS; i++) {
      if (namedfm[i].fmark.fnum == fnum)
        one_adjust_nodel(&(namedfm[i].fmark.mark.lnum));
    }

    /* last Insert position */
    one_adjust(&(curbuf->b_last_insert.lnum));

    /* last change position */
    one_adjust(&(curbuf->b_last_change.lnum));

    /* last cursor position, if it was set */
    if (!equalpos(curbuf->b_last_cursor, initpos))
      one_adjust(&(curbuf->b_last_cursor.lnum));


    /* list of change positions */
    for (i = 0; i < curbuf->b_changelistlen; ++i)
      one_adjust_nodel(&(curbuf->b_changelist[i].lnum));

    /* Visual area */
    one_adjust_nodel(&(curbuf->b_visual.vi_start.lnum));
    one_adjust_nodel(&(curbuf->b_visual.vi_end.lnum));

    /* quickfix marks */
    qf_mark_adjust(NULL, line1, line2, amount, amount_after);
    /* location lists */
    FOR_ALL_TAB_WINDOWS(tab, win) {
      qf_mark_adjust(win, line1, line2, amount, amount_after);
    }

    sign_mark_adjust(line1, line2, amount, amount_after);
  }

  /* previous context mark */
  one_adjust(&(curwin->w_pcmark.lnum));

  /* previous pcmark */
  one_adjust(&(curwin->w_prev_pcmark.lnum));

  /* saved cursor for formatting */
  if (saved_cursor.lnum != 0)
    one_adjust_nodel(&(saved_cursor.lnum));

  /*
   * Adjust items in all windows related to the current buffer.
   */
  FOR_ALL_TAB_WINDOWS(tab, win) {
    if (!cmdmod.lockmarks) {
      /* Marks in the jumplist.  When deleting lines, this may create
       * duplicate marks in the jumplist, they will be removed later. */
      for (i = 0; i < win->w_jumplistlen; ++i) {
        if (win->w_jumplist[i].fmark.fnum == fnum) {
          one_adjust_nodel(&(win->w_jumplist[i].fmark.mark.lnum));
        }
      }
    }

    if (win->w_buffer == curbuf) {
      if (!cmdmod.lockmarks) {
        /* marks in the tag stack */
        for (i = 0; i < win->w_tagstacklen; i++) {
          if (win->w_tagstack[i].fmark.fnum == fnum) {
            one_adjust_nodel(&(win->w_tagstack[i].fmark.mark.lnum));
          }
        }
      }

      /* the displayed Visual area */
      if (win->w_old_cursor_lnum != 0) {
        one_adjust_nodel(&(win->w_old_cursor_lnum));
        one_adjust_nodel(&(win->w_old_visual_lnum));
      }

      /* topline and cursor position for windows with the same buffer
       * other than the current window */
      if (win != curwin) {
        if (win->w_topline >= line1 && win->w_topline <= line2) {
          if (amount == MAXLNUM) {                  /* topline is deleted */
            if (line1 <= 1) {
              win->w_topline = 1;
            } else {
              win->w_topline = line1 - 1;
            }
          } else {                      /* keep topline on the same line */
            win->w_topline += amount;
          }
          win->w_topfill = 0;
        } else if (amount_after && win->w_topline > line2) {
          win->w_topline += amount_after;
          win->w_topfill = 0;
        }
        if (win->w_cursor.lnum >= line1 && win->w_cursor.lnum <= line2) {
          if (amount == MAXLNUM) {         /* line with cursor is deleted */
            if (line1 <= 1) {
              win->w_cursor.lnum = 1;
            } else {
              win->w_cursor.lnum = line1 - 1;
            }
            win->w_cursor.col = 0;
          } else {                      /* keep cursor on the same line */
            win->w_cursor.lnum += amount;
          }
        } else if (amount_after && win->w_cursor.lnum > line2) {
          win->w_cursor.lnum += amount_after;
        }
      }

      /* adjust folds */
      foldMarkAdjust(win, line1, line2, amount, amount_after);
    }
  }

  /* adjust diffs */
  diff_mark_adjust(line1, line2, amount, amount_after);
}

/* This code is used often, needs to be fast. */
#define col_adjust(pp) \
  { \
    posp = pp; \
    if (posp->lnum == lnum && posp->col >= mincol) \
    { \
      posp->lnum += lnum_amount; \
      assert(col_amount > INT_MIN && col_amount <= INT_MAX); \
      if (col_amount < 0 && posp->col <= (colnr_T)-col_amount) \
        posp->col = 0; \
      else \
        posp->col += (colnr_T)col_amount; \
    } \
  }

/*
 * Adjust marks in line "lnum" at column "mincol" and further: add
 * "lnum_amount" to the line number and add "col_amount" to the column
 * position.
 */
void mark_col_adjust(linenr_T lnum, colnr_T mincol, long lnum_amount, long col_amount)
{
  int i;
  int fnum = curbuf->b_fnum;
  pos_T       *posp;

  if ((col_amount == 0L && lnum_amount == 0L) || cmdmod.lockmarks)
    return;     /* nothing to do */

  /* named marks, lower case and upper case */
  for (i = 0; i < NMARKS; i++) {
    col_adjust(&(curbuf->b_namedm[i]));
    if (namedfm[i].fmark.fnum == fnum)
      col_adjust(&(namedfm[i].fmark.mark));
  }
  for (i = NMARKS; i < NMARKS + EXTRA_MARKS; i++) {
    if (namedfm[i].fmark.fnum == fnum)
      col_adjust(&(namedfm[i].fmark.mark));
  }

  /* last Insert position */
  col_adjust(&(curbuf->b_last_insert));

  /* last change position */
  col_adjust(&(curbuf->b_last_change));

  /* list of change positions */
  for (i = 0; i < curbuf->b_changelistlen; ++i)
    col_adjust(&(curbuf->b_changelist[i]));

  /* Visual area */
  col_adjust(&(curbuf->b_visual.vi_start));
  col_adjust(&(curbuf->b_visual.vi_end));

  /* previous context mark */
  col_adjust(&(curwin->w_pcmark));

  /* previous pcmark */
  col_adjust(&(curwin->w_prev_pcmark));

  /* saved cursor for formatting */
  col_adjust(&saved_cursor);

  /*
   * Adjust items in all windows related to the current buffer.
   */
  FOR_ALL_WINDOWS_IN_TAB(win, curtab) {
    /* marks in the jumplist */
    for (i = 0; i < win->w_jumplistlen; ++i) {
      if (win->w_jumplist[i].fmark.fnum == fnum) {
        col_adjust(&(win->w_jumplist[i].fmark.mark));
      }
    }

    if (win->w_buffer == curbuf) {
      /* marks in the tag stack */
      for (i = 0; i < win->w_tagstacklen; i++) {
        if (win->w_tagstack[i].fmark.fnum == fnum) {
          col_adjust(&(win->w_tagstack[i].fmark.mark));
        }
      }

      /* cursor position for other windows with the same buffer */
      if (win != curwin) {
        col_adjust(&win->w_cursor);
      }
    }
  }
}

/*
 * When deleting lines, this may create duplicate marks in the
 * jumplist. They will be removed here for the current window.
 */
static void cleanup_jumplist(void)
{
  int i;
  int from, to;

  to = 0;
  for (from = 0; from < curwin->w_jumplistlen; ++from) {
    if (curwin->w_jumplistidx == from)
      curwin->w_jumplistidx = to;
    for (i = from + 1; i < curwin->w_jumplistlen; ++i)
      if (curwin->w_jumplist[i].fmark.fnum
          == curwin->w_jumplist[from].fmark.fnum
          && curwin->w_jumplist[from].fmark.fnum != 0
          && curwin->w_jumplist[i].fmark.mark.lnum
          == curwin->w_jumplist[from].fmark.mark.lnum)
        break;
    if (i >= curwin->w_jumplistlen)         /* no duplicate */
      curwin->w_jumplist[to++] = curwin->w_jumplist[from];
    else
      xfree(curwin->w_jumplist[from].fname);
  }
  if (curwin->w_jumplistidx == curwin->w_jumplistlen)
    curwin->w_jumplistidx = to;
  curwin->w_jumplistlen = to;
}

/*
 * Copy the jumplist from window "from" to window "to".
 */
void copy_jumplist(win_T *from, win_T *to)
{
  int i;

  for (i = 0; i < from->w_jumplistlen; ++i) {
    to->w_jumplist[i] = from->w_jumplist[i];
    if (from->w_jumplist[i].fname != NULL)
      to->w_jumplist[i].fname = vim_strsave(from->w_jumplist[i].fname);
  }
  to->w_jumplistlen = from->w_jumplistlen;
  to->w_jumplistidx = from->w_jumplistidx;
}

/*
 * Free items in the jumplist of window "wp".
 */
void free_jumplist(win_T *wp)
{
  int i;

  for (i = 0; i < wp->w_jumplistlen; ++i)
    xfree(wp->w_jumplist[i].fname);
}

void set_last_cursor(win_T *win)
{
  if (win->w_buffer != NULL)
    win->w_buffer->b_last_cursor = win->w_cursor;
}

#if defined(EXITFREE)
void free_all_marks(void)
{
  int i;

  for (i = 0; i < NMARKS + EXTRA_MARKS; i++)
    if (namedfm[i].fmark.mark.lnum != 0)
      xfree(namedfm[i].fname);
}

#endif

int read_viminfo_filemark(vir_T *virp, int force)
{
  char_u      *str;
  xfmark_T    *fm;
  int i;

  /* We only get here if line[0] == '\'' or '-'.
   * Illegal mark names are ignored (for future expansion). */
  str = virp->vir_line + 1;
  if (
    *str <= 127 &&
    ((*virp->vir_line == '\'' && (ascii_isdigit(*str) || isupper(*str)))
     || (*virp->vir_line == '-' && *str == '\''))) {
    if (*str == '\'') {
      /* If the jumplist isn't full insert fmark as oldest entry */
      if (curwin->w_jumplistlen == JUMPLISTSIZE)
        fm = NULL;
      else {
        for (i = curwin->w_jumplistlen; i > 0; --i)
          curwin->w_jumplist[i] = curwin->w_jumplist[i - 1];
        ++curwin->w_jumplistidx;
        ++curwin->w_jumplistlen;
        fm = &curwin->w_jumplist[0];
        fm->fmark.mark.lnum = 0;
        fm->fname = NULL;
      }
    } else if (ascii_isdigit(*str))
      fm = &namedfm[*str - '0' + NMARKS];
    else {  // is uppercase
      assert(*str >= 'A' && *str <= 'Z');
      fm = &namedfm[*str - 'A'];
    }
    if (fm != NULL && (fm->fmark.mark.lnum == 0 || force)) {
      str = skipwhite(str + 1);
      fm->fmark.mark.lnum = getdigits_long(&str);
      str = skipwhite(str);
      fm->fmark.mark.col = getdigits_int(&str);
      fm->fmark.mark.coladd = 0;
      fm->fmark.fnum = 0;
      str = skipwhite(str);
      xfree(fm->fname);
      fm->fname = viminfo_readstring(virp, (int)(str - virp->vir_line),
          FALSE);
    }
  }
  return vim_fgets(virp->vir_line, LSIZE, virp->vir_fd);
}

void write_viminfo_filemarks(FILE *fp)
{
  int i;
  char_u      *name;
  buf_T       *buf;
  xfmark_T    *fm;

  if (get_viminfo_parameter('f') == 0)
    return;

  fputs(_("\n# File marks:\n"), fp);

  /*
   * Find a mark that is the same file and position as the cursor.
   * That one, or else the last one is deleted.
   * Move '0 to '1, '1 to '2, etc. until the matching one or '9
   * Set '0 mark to current cursor position.
   */
  if (curbuf->b_ffname != NULL && !removable(curbuf->b_ffname)) {
    name = buflist_nr2name(curbuf->b_fnum, TRUE, FALSE);
    for (i = NMARKS; i < NMARKS + EXTRA_MARKS - 1; ++i)
      if (namedfm[i].fmark.mark.lnum == curwin->w_cursor.lnum
          && (namedfm[i].fname == NULL
              ? namedfm[i].fmark.fnum == curbuf->b_fnum
              : (name != NULL
                 && STRCMP(name, namedfm[i].fname) == 0)))
        break;
    xfree(name);

    xfree(namedfm[i].fname);
    for (; i > NMARKS; --i)
      namedfm[i] = namedfm[i - 1];
    namedfm[NMARKS].fmark.mark = curwin->w_cursor;
    namedfm[NMARKS].fmark.fnum = curbuf->b_fnum;
    namedfm[NMARKS].fname = NULL;
  }

  /* Write the filemarks '0 - '9 and 'A - 'Z */
  for (i = 0; i < NMARKS + EXTRA_MARKS; i++)
    write_one_filemark(fp, &namedfm[i], '\'',
        i < NMARKS ? i + 'A' : i - NMARKS + '0');

  /* Write the jumplist with -' */
  fputs(_("\n# Jumplist (newest first):\n"), fp);
  setpcmark();          /* add current cursor position */
  cleanup_jumplist();
  for (fm = &curwin->w_jumplist[curwin->w_jumplistlen - 1];
       fm >= &curwin->w_jumplist[0]; --fm) {
    if (fm->fmark.fnum == 0
        || ((buf = buflist_findnr(fm->fmark.fnum)) != NULL
            && !removable(buf->b_ffname)))
      write_one_filemark(fp, fm, '-', '\'');
  }
}

static void write_one_filemark(FILE *fp, xfmark_T *fm, int c1, int c2)
{
  char_u      *name;

  if (fm->fmark.mark.lnum == 0)         /* not set */
    return;

  if (fm->fmark.fnum != 0)              /* there is a buffer */
    name = buflist_nr2name(fm->fmark.fnum, TRUE, FALSE);
  else
    name = fm->fname;                   /* use name from .viminfo */
  if (name != NULL && *name != NUL) {
    fprintf(fp, "%c%c  %" PRId64 "  %" PRId64 "  ",
            c1, c2, (int64_t)fm->fmark.mark.lnum, (int64_t)fm->fmark.mark.col);
    viminfo_writestring(fp, name);
  }

  if (fm->fmark.fnum != 0)
    xfree(name);
}

/*
 * Return TRUE if "name" is on removable media (depending on 'viminfo').
 */
int removable(char_u *name)
{
  char_u  *p;
  char_u part[51];
  int retval = FALSE;
  size_t n;

  name = home_replace_save(NULL, name);
  for (p = p_viminfo; *p; ) {
    copy_option_part(&p, part, 51, ", ");
    if (part[0] == 'r') {
      n = STRLEN(part + 1);
      if (mb_strnicmp(part + 1, name, n) == 0) {
        retval = TRUE;
        break;
      }
    }
  }
  xfree(name);
  return retval;
}


/*
 * Write all the named marks for all buffers.
 * Return the number of buffers for which marks have been written.
 */
int write_viminfo_marks(FILE *fp_out)
{
  /*
   * Set b_last_cursor for the all buffers that have a window.
   */
  FOR_ALL_TAB_WINDOWS(tp, win) {
    set_last_cursor(win);
  }

  fputs(_("\n# History of marks within files (newest to oldest):\n"), fp_out);
  int count = 0;
  FOR_ALL_BUFFERS(buf) {
    /*
     * Only write something if buffer has been loaded and at least one
     * mark is set.
     */
    if (buf->b_marks_read) {
      bool is_mark_set = true;
      if (buf->b_last_cursor.lnum == 0) {
        is_mark_set = false;
        for (int i = 0; i < NMARKS; i++) {
          if (buf->b_namedm[i].lnum != 0) {
            is_mark_set = true;
            break;
          }
        }
      }
      if (is_mark_set && buf->b_ffname != NULL
          && buf->b_ffname[0] != NUL && !removable(buf->b_ffname)) {
        home_replace(NULL, buf->b_ffname, IObuff, IOSIZE, TRUE);
        fprintf(fp_out, "\n> ");
        viminfo_writestring(fp_out, IObuff);
        write_one_mark(fp_out, '"', &buf->b_last_cursor);
        write_one_mark(fp_out, '^', &buf->b_last_insert);
        write_one_mark(fp_out, '.', &buf->b_last_change);
        /* changelist positions are stored oldest first */
        for (int i = 0; i < buf->b_changelistlen; ++i) {
          write_one_mark(fp_out, '+', &buf->b_changelist[i]);
        }
        for (int i = 0; i < NMARKS; i++) {
          write_one_mark(fp_out, 'a' + i, &buf->b_namedm[i]);
        }
        count++;
      }
    }
  }

  return count;
}

static void write_one_mark(FILE *fp_out, int c, pos_T *pos)
{
  if (pos->lnum != 0)
    fprintf(fp_out, "\t%c\t%" PRId64 "\t%d\n", c,
            (int64_t)pos->lnum, (int)pos->col);
}

/*
 * Handle marks in the viminfo file:
 * fp_out != NULL: copy marks for buffers not in buffer list
 * fp_out == NULL && (flags & VIF_WANT_MARKS): read marks for curbuf only
 * fp_out == NULL && (flags & VIF_GET_OLDFILES | VIF_FORCEIT): fill v:oldfiles
 */
void copy_viminfo_marks(vir_T *virp, FILE *fp_out, int count, int eof, int flags)
{
  char_u      *line = virp->vir_line;
  buf_T       *buf;
  int num_marked_files;
  int load_marks;
  int copy_marks_out;
  char_u      *str;
  int i;
  char_u      *p;
  char_u      *name_buf;
  pos_T pos;
  list_T      *list = NULL;

  name_buf = xmalloc(LSIZE);
  *name_buf = NUL;

  if (fp_out == NULL && (flags & (VIF_GET_OLDFILES | VIF_FORCEIT))) {
    list = list_alloc();
    set_vim_var_list(VV_OLDFILES, list);
  }

  num_marked_files = get_viminfo_parameter('\'');
  while (!eof && (count < num_marked_files || fp_out == NULL)) {
    if (line[0] != '>') {
      if (line[0] != '\n' && line[0] != '\r' && line[0] != '#') {
        if (viminfo_error("E576: ", _("Missing '>'"), line))
          break;                /* too many errors, return now */
      }
      eof = vim_fgets(line, LSIZE, virp->vir_fd);
      continue;                 /* Skip this dud line */
    }

    /*
     * Handle long line and translate escaped characters.
     * Find file name, set str to start.
     * Ignore leading and trailing white space.
     */
    str = skipwhite(line + 1);
    str = viminfo_readstring(virp, (int)(str - virp->vir_line), FALSE);
    p = str + STRLEN(str);
    while (p != str && (*p == NUL || ascii_isspace(*p)))
      p--;
    if (*p)
      p++;
    *p = NUL;

    if (list != NULL)
      list_append_string(list, str, -1);

    /*
     * If fp_out == NULL, load marks for current buffer.
     * If fp_out != NULL, copy marks for buffers not in buflist.
     */
    load_marks = copy_marks_out = FALSE;
    if (fp_out == NULL) {
      if ((flags & VIF_WANT_MARKS) && curbuf->b_ffname != NULL) {
        if (*name_buf == NUL)               /* only need to do this once */
          home_replace(NULL, curbuf->b_ffname, name_buf, LSIZE, TRUE);
        if (fnamecmp(str, name_buf) == 0)
          load_marks = TRUE;
      }
    } else { /* fp_out != NULL */
             /* This is slow if there are many buffers!! */
      buf = NULL;
      FOR_ALL_BUFFERS(bp) {
        if (bp->b_ffname != NULL) {
          home_replace(NULL, bp->b_ffname, name_buf, LSIZE, TRUE);
          if (fnamecmp(str, name_buf) == 0) {
            buf = bp;
            break;
          }
        }
      }

      /*
       * copy marks if the buffer has not been loaded
       */
      if (buf == NULL || !buf->b_marks_read) {
        copy_marks_out = TRUE;
        fputs("\n> ", fp_out);
        viminfo_writestring(fp_out, str);
        count++;
      }
    }
    xfree(str);

    pos.coladd = 0;
    while (!(eof = viminfo_readline(virp)) && line[0] == TAB) {
      if (load_marks) {
        if (line[1] != NUL) {
          int64_t lnum_64;
          unsigned int u;
          sscanf((char *)line + 2, "%" SCNd64 "%u", &lnum_64, &u);
          // safely downcast to linenr_T (long); remove when linenr_T refactored
          assert(lnum_64 <= LONG_MAX); 
          pos.lnum = (linenr_T)lnum_64;
          assert(u <= INT_MAX);
          pos.col = (colnr_T)u;
          switch (line[1]) {
          case '"': curbuf->b_last_cursor = pos; break;
          case '^': curbuf->b_last_insert = pos; break;
          case '.': curbuf->b_last_change = pos; break;
          case '+':
            /* changelist positions are stored oldest
             * first */
            if (curbuf->b_changelistlen == JUMPLISTSIZE)
              /* list is full, remove oldest entry */
              memmove(curbuf->b_changelist,
                  curbuf->b_changelist + 1,
                  sizeof(pos_T) * (JUMPLISTSIZE - 1));
            else
              ++curbuf->b_changelistlen;
            curbuf->b_changelist[
              curbuf->b_changelistlen - 1] = pos;
            break;
          default:  if ((i = line[1] - 'a') >= 0 && i < NMARKS)
              curbuf->b_namedm[i] = pos;
          }
        }
      } else if (copy_marks_out)
        fputs((char *)line, fp_out);
    }
    if (load_marks) {
      FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
        if (wp->w_buffer == curbuf)
          wp->w_changelistidx = curbuf->b_changelistlen;
      }
      break;
    }
  }
  xfree(name_buf);
}
