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- /* vi:set ts=4 sw=4:
- *
- * VIM - Vi IMproved by Bram Moolenaar
- *
- * Do ":help uganda" in Vim to read copying and usage conditions.
- * Do ":help credits" in Vim to see a list of people who contributed.
- */
-
- /*
- * buffer.c: functions for dealing with the buffer structure
- */
-
- /*
- * The buffer list is a double linked list of all buffers.
- * Each buffer can be in one of these states:
- * never loaded: b_neverloaded == TRUE, only the file name is valid
- * not loaded: b_ml.ml_mfp == NULL, no memfile allocated
- * hidden: b_nwindows == 0, loaded but not displayed in a window
- * normal: loaded and displayed in a window
- *
- * Instead of storing file names all over the place, each file name is
- * stored in the buffer list. It can be referenced by a number.
- *
- * The current implementation remembers all file names ever used.
- */
-
- #include "vim.h"
- #include "globals.h"
- #include "proto.h"
- #include "option.h"
-
- static void enter_buffer __ARGS((BUF *));
- static char_u *buflist_match __ARGS((regexp *prog, BUF *buf));
- static void buflist_setlnum __ARGS((BUF *, linenr_t));
- static linenr_t buflist_findlnum __ARGS((BUF *));
- static int append_arg_number __ARGS((char_u *, int, int));
-
- /*
- * Open current buffer, that is: open the memfile and read the file into memory
- * return FAIL for failure, OK otherwise
- */
- int
- open_buffer()
- {
- int retval = OK;
- #ifdef AUTOCMD
- BUF *old_curbuf;
- BUF *new_curbuf;
- #endif
-
- /*
- * The 'readonly' flag is only set when b_neverloaded is being reset.
- * When re-entering the same buffer, it should not change, because the
- * user may have reset the flag by hand.
- */
- if (readonlymode && curbuf->b_filename != NULL && curbuf->b_neverloaded)
- curbuf->b_p_ro = TRUE;
-
- if (ml_open() == FAIL)
- {
- /*
- * There MUST be a memfile, otherwise we can't do anything
- * If we can't create one for the current buffer, take another buffer
- */
- close_buffer(NULL, curbuf, FALSE, FALSE);
- for (curbuf = firstbuf; curbuf != NULL; curbuf = curbuf->b_next)
- if (curbuf->b_ml.ml_mfp != NULL)
- break;
- /*
- * if there is no memfile at all, exit
- * This is OK, since there are no changes to loose.
- */
- if (curbuf == NULL)
- {
- EMSG("Cannot allocate buffer, exiting...");
- getout(2);
- }
- EMSG("Cannot allocate buffer, using other one...");
- enter_buffer(curbuf);
- return FAIL;
- }
- #ifdef AUTOCMD
- /* The autocommands in readfile() may change the buffer, but only AFTER
- * reading the file. */
- old_curbuf = curbuf;
- #endif
- if (curbuf->b_filename != NULL)
- retval = readfile(curbuf->b_filename, curbuf->b_sfilename,
- (linenr_t)0, TRUE, (linenr_t)0, MAXLNUM, FALSE);
- else
- {
- MSG("Empty Buffer");
- msg_col = 0;
- msg_didout = FALSE; /* overwrite this message whenever you like */
- }
-
- /* if first time loading this buffer, init chartab */
- if (curbuf->b_neverloaded)
- init_chartab();
-
- /*
- * Reset the Changed flag first, autocmds may change the buffer.
- * Apply the automatic commands, before processing the modelines.
- * So the modelines have priority over auto commands.
- */
- if (retval != FAIL)
- UNCHANGED(curbuf);
-
- #ifdef AUTOCMD
- apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE);
- #endif
-
- if (retval != FAIL)
- {
- #ifdef AUTOCMD
- /*
- * The autocommands may have changed the current buffer. Apply the
- * modelines to the correct buffer, if it still exists.
- */
- if (buf_valid(old_curbuf))
- {
- new_curbuf = curbuf;
- curbuf = old_curbuf;
- curwin->w_buffer = old_curbuf;
- #endif
- do_modelines();
- curbuf->b_neverloaded = FALSE;
- #ifdef AUTOCMD
- curbuf = new_curbuf;
- curwin->w_buffer = new_curbuf;
- }
- #endif
- }
-
- return retval;
- }
-
- /*
- * Return TRUE if "buf" points to a valid buffer (in the buffer list).
- */
- int
- buf_valid(buf)
- BUF *buf;
- {
- BUF *bp;
-
- for (bp = firstbuf; bp != NULL; bp = bp->b_next)
- if (bp == buf)
- return TRUE;
- return FALSE;
- }
-
- /*
- * Close the link to a buffer. If "free_buf" is TRUE free the buffer if it
- * becomes unreferenced. The caller should get a new buffer very soon!
- * if 'del_buf' is TRUE, remove the buffer from the buffer list.
- */
- void
- close_buffer(win, buf, free_buf, del_buf)
- WIN *win; /* if not NULL, set b_last_cursor */
- BUF *buf;
- int free_buf;
- int del_buf;
- {
- if (buf->b_nwindows > 0)
- --buf->b_nwindows;
- if (buf->b_nwindows == 0 && win != NULL)
- set_last_cursor(win); /* may set b_last_cursor */
- if (buf->b_nwindows > 0 || !free_buf)
- {
- if (buf == curbuf)
- u_sync(); /* sync undo before going to another buffer */
- return;
- }
-
- buf_freeall(buf); /* free all things allocated for this buffer */
- /*
- * If there is no file name, remove the buffer from the list
- */
- if (buf->b_filename == NULL || del_buf)
- {
- vim_free(buf->b_filename);
- vim_free(buf->b_sfilename);
- if (buf->b_prev == NULL)
- firstbuf = buf->b_next;
- else
- buf->b_prev->b_next = buf->b_next;
- if (buf->b_next == NULL)
- lastbuf = buf->b_prev;
- else
- buf->b_next->b_prev = buf->b_prev;
- free_buf_options(buf);
- vim_free(buf);
- }
- else
- buf_clear(buf);
- }
-
- /*
- * buf_clear() - make buffer empty
- */
- void
- buf_clear(buf)
- BUF *buf;
- {
- buf->b_ml.ml_line_count = 1;
- buf->b_changed = FALSE;
- #ifndef SHORT_FNAME
- buf->b_shortname = FALSE;
- #endif
- buf->b_p_eol = TRUE;
- buf->b_ml.ml_mfp = NULL;
- buf->b_ml.ml_flags = ML_EMPTY; /* empty buffer */
- }
-
- /*
- * buf_freeall() - free all things allocated for the buffer
- */
- void
- buf_freeall(buf)
- BUF *buf;
- {
- u_blockfree(buf); /* free the memory allocated for undo */
- ml_close(buf, TRUE); /* close and delete the memline/memfile */
- buf->b_ml.ml_line_count = 0; /* no lines in buffer */
- u_clearall(buf); /* reset all undo information */
- }
-
- /*
- * do_bufdel() - delete or unload buffer(s)
- *
- * addr_count == 0: ":bdel" - delete current buffer
- * addr_count == 1: ":N bdel" or ":bdel N [N ..] - first delete
- * buffer "end_bnr", then any other arguments.
- * addr_count == 2: ":N,N bdel" - delete buffers in range
- *
- * command can be DOBUF_UNLOAD (":bunload") or DOBUF_DEL (":bdel")
- *
- * Returns error message or NULL
- */
- char_u *
- do_bufdel(command, arg, addr_count, start_bnr, end_bnr, forceit)
- int command;
- char_u *arg; /* pointer to extra arguments */
- int addr_count;
- int start_bnr; /* first buffer number in a range */
- int end_bnr; /* buffer number or last buffer number in a range */
- int forceit;
- {
- int do_current = 0; /* delete current buffer? */
- int deleted = 0; /* number of buffers deleted */
- char_u *errormsg = NULL; /* return value */
- int bnr; /* buffer number */
- char_u *p;
-
- if (addr_count == 0)
- (void)do_buffer(command, DOBUF_CURRENT, FORWARD, 0, forceit);
- else
- {
- if (addr_count == 2)
- {
- if (*arg) /* both range and argument is not allowed */
- return e_trailing;
- bnr = start_bnr;
- }
- else /* addr_count == 1 */
- bnr = end_bnr;
-
- for ( ;!got_int; mch_breakcheck())
- {
- /*
- * delete the current buffer last, otherwise when the
- * current buffer is deleted, the next buffer becomes
- * the current one and will be loaded, which may then
- * also be deleted, etc.
- */
- if (bnr == curbuf->b_fnum)
- do_current = bnr;
- else if (do_buffer(command, DOBUF_FIRST, FORWARD, (int)bnr,
- forceit) == OK)
- ++deleted;
-
- /*
- * find next buffer number to delete/unload
- */
- if (addr_count == 2)
- {
- if (++bnr > end_bnr)
- break;
- }
- else /* addr_count == 1 */
- {
- arg = skipwhite(arg);
- if (*arg == NUL)
- break;
- if (!isdigit(*arg))
- {
- p = skiptowhite_esc(arg);
- bnr = buflist_findpat(arg, p);
- if (bnr < 0) /* failed */
- break;
- arg = p;
- }
- else
- bnr = getdigits(&arg);
- }
- }
- if (!got_int && do_current && do_buffer(command, DOBUF_FIRST,
- FORWARD, do_current, forceit) == OK)
- ++deleted;
-
- if (deleted == 0)
- {
- sprintf((char *)IObuff, "No buffers were %s",
- command == DOBUF_UNLOAD ? "unloaded" : "deleted");
- errormsg = IObuff;
- }
- else
- smsg((char_u *)"%d buffer%s %s", deleted,
- plural((long)deleted),
- command == DOBUF_UNLOAD ? "unloaded" : "deleted");
- }
-
- return errormsg;
- }
-
- /*
- * Implementation of the command for the buffer list
- *
- * action == DOBUF_GOTO go to specified buffer
- * action == DOBUF_SPLIT split window and go to specified buffer
- * action == DOBUF_UNLOAD unload specified buffer(s)
- * action == DOBUF_DEL delete specified buffer(s)
- *
- * start == DOBUF_CURRENT go to "count" buffer from current buffer
- * start == DOBUF_FIRST go to "count" buffer from first buffer
- * start == DOBUF_LAST go to "count" buffer from last buffer
- * start == DOBUF_MOD go to "count" modified buffer from current buffer
- *
- * Return FAIL or OK.
- */
- int
- do_buffer(action, start, dir, count, forceit)
- int action;
- int start;
- int dir; /* FORWARD or BACKWARD */
- int count; /* buffer number or number of buffers */
- int forceit; /* TRUE for :bdelete! */
- {
- BUF *buf;
- BUF *delbuf;
- int retval;
-
- switch (start)
- {
- case DOBUF_FIRST: buf = firstbuf; break;
- case DOBUF_LAST: buf = lastbuf; break;
- default: buf = curbuf; break;
- }
- if (start == DOBUF_MOD) /* find next modified buffer */
- {
- while (count-- > 0)
- {
- do
- {
- buf = buf->b_next;
- if (buf == NULL)
- buf = firstbuf;
- }
- while (buf != curbuf && !buf->b_changed);
- }
- if (!buf->b_changed)
- {
- EMSG("No modified buffer found");
- return FAIL;
- }
- }
- else if (start == DOBUF_FIRST && count) /* find specified buffer number */
- {
- while (buf != NULL && buf->b_fnum != count)
- buf = buf->b_next;
- }
- else
- {
- while (count-- > 0)
- {
- if (dir == FORWARD)
- {
- buf = buf->b_next;
- if (buf == NULL)
- buf = firstbuf;
- }
- else
- {
- buf = buf->b_prev;
- if (buf == NULL)
- buf = lastbuf;
- }
- }
- }
-
- if (buf == NULL) /* could not find it */
- {
- if (start == DOBUF_FIRST)
- {
- /* don't warn when deleting */
- if (action != DOBUF_UNLOAD && action != DOBUF_DEL)
- EMSGN("Cannot go to buffer %ld", count);
- }
- else if (dir == FORWARD)
- EMSG("Cannot go beyond last buffer");
- else
- EMSG("Cannot go before first buffer");
- return FAIL;
- }
-
- /*
- * delete buffer buf from memory and/or the list
- */
- if (action == DOBUF_UNLOAD || action == DOBUF_DEL)
- {
- if (!forceit && buf->b_changed)
- {
- EMSGN("No write since last change for buffer %ld (use ! to override)",
- buf->b_fnum);
- return FAIL;
- }
-
- /*
- * If deleting last buffer, make it empty.
- * The last buffer cannot be unloaded.
- */
- if (firstbuf->b_next == NULL)
- {
- if (action == DOBUF_UNLOAD)
- {
- EMSG("Cannot unload last buffer");
- return FAIL;
- }
-
- /* Close any other windows on this buffer, then make it empty. */
- close_others(FALSE);
- buf = curbuf;
- setpcmark();
- retval = do_ecmd(0, NULL, NULL, NULL, (linenr_t)1,
- forceit ? ECMD_FORCEIT : 0);
-
- /*
- * do_ecmd() may create a new buffer, then we have to delete
- * the old one. But do_ecmd() may have done that already, check
- * if the buffer still exists.
- */
- if (buf != curbuf && buf_valid(buf))
- close_buffer(NULL, buf, TRUE, TRUE);
- return retval;
- }
-
- /*
- * If the deleted buffer is the current one, close the current window
- * (unless it's the only window).
- */
- while (buf == curbuf && firstwin != lastwin)
- close_window(curwin, FALSE);
-
- /*
- * If the buffer to be deleted is not current one, delete it here.
- */
- if (buf != curbuf)
- {
- close_windows(buf);
- if (buf_valid(buf))
- close_buffer(NULL, buf, TRUE, action == DOBUF_DEL);
- return OK;
- }
-
- /*
- * Deleting the current buffer: Need to find another buffer to go to.
- * There must be another, otherwise it would have been handled above.
- * First try to find one that is loaded.
- */
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- if (buf != curbuf && buf->b_ml.ml_mfp != NULL)
- break;
- if (buf == NULL) /* No loaded buffers, just take anyone */
- {
- if (curbuf->b_next != NULL)
- buf = curbuf->b_next;
- else
- buf = curbuf->b_prev;
- }
- }
-
- /*
- * make buf current buffer
- */
- if (action == DOBUF_SPLIT) /* split window first */
- {
- if (win_split(0, FALSE) == FAIL)
- return FAIL;
- }
-
- /* go to current buffer - nothing to do */
- if (buf == curbuf)
- return OK;
-
- setpcmark();
- curwin->w_alt_fnum = curbuf->b_fnum; /* remember alternate file */
- buflist_altlnum(); /* remember curpos.lnum */
-
- /* close_windows() or apply_autocmds() may change curbuf */
- delbuf = curbuf;
-
- #ifdef AUTOCMD
- apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE);
- if (buf_valid(delbuf))
- #endif
- {
- if (action == DOBUF_UNLOAD || action == DOBUF_DEL)
- close_windows(delbuf);
- if (buf_valid(delbuf))
- close_buffer(NULL, delbuf, action == DOBUF_UNLOAD ||
- action == DOBUF_DEL, action == DOBUF_DEL);
- }
- #ifdef AUTOCMD
- if (buf_valid(buf)) /* an autocommand may have deleted buf! */
- #endif
- enter_buffer(buf);
- return OK;
- }
-
- /*
- * enter a new current buffer.
- * (old curbuf must have been freed already)
- */
- static void
- enter_buffer(buf)
- BUF *buf;
- {
- buf_copy_options(curbuf, buf, TRUE, FALSE);
- curwin->w_buffer = buf;
- curbuf = buf;
- ++curbuf->b_nwindows;
- if (curbuf->b_ml.ml_mfp == NULL) /* need to load the file */
- open_buffer();
- else
- {
- need_fileinfo = TRUE; /* display file info after redraw */
- buf_check_timestamp(curbuf); /* check if file has changed */
- #ifdef AUTOCMD
- apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE);
- #endif
- }
- buflist_getlnum(); /* restore curpos.lnum */
- check_arg_idx(); /* check for valid arg_idx */
- maketitle();
- scroll_cursor_halfway(FALSE); /* redisplay at correct position */
- updateScreen(NOT_VALID);
- }
-
- /*
- * functions for dealing with the buffer list
- */
-
- /*
- * Add a file name to the buffer list. Return a pointer to the buffer.
- * If the same file name already exists return a pointer to that buffer.
- * If it does not exist, or if fname == NULL, a new entry is created.
- * If use_curbuf is TRUE, may use current buffer.
- * This is the ONLY way to create a new buffer.
- */
- BUF *
- buflist_new(fname, sfname, lnum, use_curbuf)
- char_u *fname;
- char_u *sfname;
- linenr_t lnum;
- int use_curbuf;
- {
- static int top_file_num = 1; /* highest file number */
- BUF *buf;
-
- fname_expand(&fname, &sfname);
-
- /*
- * If file name already exists in the list, update the entry
- */
- if (fname != NULL && (buf = buflist_findname(fname)) != NULL)
- {
- if (lnum != 0)
- buflist_setlnum(buf, lnum);
- /* copy the options now, if 'cpo' doesn't have 's' and not done
- * already */
- buf_copy_options(curbuf, buf, FALSE, FALSE);
- return buf;
- }
-
- /*
- * If the current buffer has no name and no contents, use the current buffer.
- * Otherwise: Need to allocate a new buffer structure.
- *
- * This is the ONLY place where a new buffer structure is allocated!
- */
- if (use_curbuf && curbuf != NULL && curbuf->b_filename == NULL &&
- curbuf->b_nwindows <= 1 &&
- (curbuf->b_ml.ml_mfp == NULL || bufempty()))
- buf = curbuf;
- else
- {
- buf = (BUF *)alloc((unsigned)sizeof(BUF));
- if (buf == NULL)
- return NULL;
- (void)vim_memset(buf, 0, sizeof(BUF));
- }
-
- if (fname != NULL)
- {
- buf->b_filename = strsave(fname);
- buf->b_sfilename = strsave(sfname);
- }
- if (buf->b_winlnum == NULL)
- buf->b_winlnum = (WINLNUM *)alloc((unsigned)sizeof(WINLNUM));
- if ((fname != NULL && (buf->b_filename == NULL ||
- buf->b_sfilename == NULL)) || buf->b_winlnum == NULL)
- {
- vim_free(buf->b_filename);
- buf->b_filename = NULL;
- vim_free(buf->b_sfilename);
- buf->b_sfilename = NULL;
- if (buf != curbuf)
- {
- vim_free(buf->b_winlnum);
- free_buf_options(buf);
- vim_free(buf);
- }
- return NULL;
- }
-
- if (buf == curbuf)
- {
- buf_freeall(buf); /* free all things allocated for this buffer */
- buf->b_nwindows = 0;
- }
- else
- {
- /*
- * put new buffer at the end of the buffer list
- */
- buf->b_next = NULL;
- if (firstbuf == NULL) /* buffer list is empty */
- {
- buf->b_prev = NULL;
- firstbuf = buf;
- }
- else /* append new buffer at end of list */
- {
- lastbuf->b_next = buf;
- buf->b_prev = lastbuf;
- }
- lastbuf = buf;
-
- buf->b_fnum = top_file_num++;
- if (top_file_num < 0) /* wrap around (may cause duplicates) */
- {
- EMSG("Warning: List of file names overflow");
- mch_delay(3000L, TRUE); /* make sure it is noticed */
- top_file_num = 1;
- }
-
- buf->b_winlnum->wl_lnum = lnum;
- buf->b_winlnum->wl_next = NULL;
- buf->b_winlnum->wl_prev = NULL;
- buf->b_winlnum->wl_win = curwin;
-
- /*
- * Always copy the options from the current buffer.
- */
- buf_copy_options(curbuf, buf, FALSE, TRUE);
- }
-
- if (did_cd)
- buf->b_xfilename = buf->b_filename;
- else
- buf->b_xfilename = buf->b_sfilename;
- buf->b_u_synced = TRUE;
- buf->b_neverloaded = TRUE;
- buf_clear(buf);
- clrallmarks(buf); /* clear marks */
- fmarks_check_names(buf); /* check file marks for this file */
-
- return buf;
- }
-
- /*
- * Free the memory for the options of a buffer.
- */
- void
- free_buf_options(buf)
- BUF *buf;
- {
- free_string_option(buf->b_p_fo);
- free_string_option(buf->b_p_isk);
- free_string_option(buf->b_p_com);
- #ifdef CINDENT
- free_string_option(buf->b_p_cink);
- free_string_option(buf->b_p_cino);
- #endif
- #if defined(CINDENT) || defined(SMARTINDENT)
- free_string_option(buf->b_p_cinw);
- #endif
- }
-
- /*
- * get alternate file n
- * set linenr to lnum or altlnum if lnum == 0
- * if (options & GETF_SETMARK) call setpcmark()
- * if (options & GETF_ALT) we are jumping to an alternate file.
- *
- * return FAIL for failure, OK for success
- */
- int
- buflist_getfile(n, lnum, options, forceit)
- int n;
- linenr_t lnum;
- int options;
- int forceit;
- {
- BUF *buf;
-
- buf = buflist_findnr(n);
- if (buf == NULL)
- {
- if ((options & GETF_ALT) && n == 0)
- emsg(e_noalt);
- else
- EMSGN("buffer %ld not found", n);
- return FAIL;
- }
-
- /* if alternate file is the current buffer, nothing to do */
- if (buf == curbuf)
- return OK;
-
- /* altlnum may be changed by getfile(), get it now */
- if (lnum == 0)
- lnum = buflist_findlnum(buf);
- ++RedrawingDisabled;
- if (getfile(buf->b_fnum, NULL, NULL, (options & GETF_SETMARK),
- lnum, forceit) <= 0)
- {
- --RedrawingDisabled;
- return OK;
- }
- --RedrawingDisabled;
- return FAIL;
- }
-
- /*
- * go to the last know line number for the current buffer
- */
- void
- buflist_getlnum()
- {
- linenr_t lnum;
-
- curwin->w_cursor.lnum = 1;
- curwin->w_cursor.col = 0;
- lnum = buflist_findlnum(curbuf);
- if (lnum != 0 && lnum <= curbuf->b_ml.ml_line_count)
- curwin->w_cursor.lnum = lnum;
- }
-
- /*
- * find file in buffer list by name (it has to be for the current window)
- * 'fname' must have a full path.
- */
- BUF *
- buflist_findname(fname)
- char_u *fname;
- {
- BUF *buf;
-
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- if (buf->b_filename != NULL && fnamecmp(fname, buf->b_filename) == 0)
- return (buf);
- return NULL;
- }
-
- /*
- * Find file in buffer list by a regexppattern.
- * Return fnum of the found buffer, < 0 for error.
- */
- int
- buflist_findpat(pattern, pattern_end)
- char_u *pattern;
- char_u *pattern_end; /* pointer to first char after pattern */
- {
- BUF *buf;
- regexp *prog;
- int fnum = -1;
- char_u *pat;
- char_u *match;
- int attempt;
- char_u *p;
-
- if (pattern_end == pattern + 1 && (*pattern == '%' || *pattern == '#'))
- {
- if (*pattern == '%')
- fnum = curbuf->b_fnum;
- else
- fnum = curwin->w_alt_fnum;
- }
-
- /*
- * Try four ways of matching:
- * attempt == 0: without '^' or '$' (at any position)
- * attempt == 1: with '^' at start (only at postion 0)
- * attempt == 2: with '$' at end (only match at end)
- * attempt == 3: with '^' at start and '$' at end (only full match)
- */
- else for (attempt = 0; attempt <= 3; ++attempt)
- {
- /* may add '^' and '$' */
- pat = file_pat_to_reg_pat(pattern, pattern_end, NULL);
- if (pat == NULL)
- return -1;
- if (attempt < 2)
- {
- p = pat + STRLEN(pat) - 1;
- if (p > pat && *p == '$') /* remove '$' */
- *p = NUL;
- }
- p = pat;
- if (*p == '^' && !(attempt & 1)) /* remove '^' */
- ++p;
- prog = vim_regcomp(p);
- vim_free(pat);
- if (prog == NULL)
- return -1;
-
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- {
- match = buflist_match(prog, buf);
- if (match != NULL)
- {
- if (fnum >= 0) /* already found a match */
- {
- fnum = -2;
- break;
- }
- fnum = buf->b_fnum; /* remember first match */
- }
- }
- vim_free(prog);
- if (fnum >= 0) /* found one match */
- break;
- }
-
- if (fnum == -2)
- EMSG2("More than one match for %s", pattern);
- else if (fnum < 1)
- EMSG2("No matching buffer for %s", pattern);
- return fnum;
- }
-
- /*
- * Find all buffer names that match.
- * For command line expansion of ":buf" and ":sbuf".
- * Return OK if matches found, FAIL otherwise.
- */
- int
- ExpandBufnames(pat, num_file, file, options)
- char_u *pat;
- int *num_file;
- char_u ***file;
- int options;
- {
- int count = 0;
- BUF *buf;
- int round;
- char_u *p;
- int attempt;
- regexp *prog;
-
- *num_file = 0; /* return values in case of FAIL */
- *file = NULL;
-
- /*
- * attempt == 1: try match with '^', match at start
- * attempt == 2: try match without '^', match anywhere
- */
- for (attempt = 1; attempt <= 2; ++attempt)
- {
- if (attempt == 2)
- {
- if (*pat != '^') /* there's no '^', no need to try again */
- break;
- ++pat; /* skip the '^' */
- }
- prog = vim_regcomp(pat);
- if (prog == NULL)
- return FAIL;
-
- /*
- * round == 1: Count the matches.
- * round == 2: Build the array to keep the matches.
- */
- for (round = 1; round <= 2; ++round)
- {
- count = 0;
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- {
- p = buflist_match(prog, buf);
- if (p != NULL)
- {
- if (round == 1)
- ++count;
- else
- {
- if (options & WILD_HOME_REPLACE)
- p = home_replace_save(buf, p);
- else
- p = strsave(p);
- (*file)[count++] = p;
- }
- }
- }
- if (count == 0) /* no match found, break here */
- break;
- if (round == 1)
- {
- *file = (char_u **)alloc((unsigned)(count * sizeof(char_u *)));
- if (*file == NULL)
- {
- vim_free(prog);
- return FAIL;
- }
- }
- }
- vim_free(prog);
- if (count) /* match(es) found, break here */
- break;
- }
-
- *num_file = count;
- return (count == 0 ? FAIL : OK);
- }
-
- /*
- * Check for a match on the file name for buffer "buf" with regex prog "prog".
- */
- static char_u *
- buflist_match(prog, buf)
- regexp *prog;
- BUF *buf;
- {
- char_u *match = NULL;
-
- if (buf->b_sfilename != NULL &&
- vim_regexec(prog, buf->b_sfilename, TRUE) != 0)
- match = buf->b_sfilename;
- else if (buf->b_filename != NULL)
- {
- if (vim_regexec(prog, buf->b_filename, TRUE) != 0)
- match = buf->b_filename;
- else
- {
- home_replace(NULL, buf->b_filename, NameBuff, MAXPATHL);
- if (vim_regexec(prog, NameBuff, TRUE) != 0)
- match = buf->b_filename;
- }
- }
- return match;
- }
-
- /*
- * find file in buffer name list by number
- */
- BUF *
- buflist_findnr(nr)
- int nr;
- {
- BUF *buf;
-
- if (nr == 0)
- nr = curwin->w_alt_fnum;
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- if (buf->b_fnum == nr)
- return (buf);
- return NULL;
- }
-
- /*
- * get name of file 'n' in the buffer list
- */
- char_u *
- buflist_nr2name(n, fullname, helptail)
- int n;
- int fullname;
- int helptail; /* for help buffers return tail only */
- {
- BUF *buf;
- char_u *fname;
-
- buf = buflist_findnr(n);
- if (buf == NULL)
- return NULL;
- if (fullname)
- fname = buf->b_filename;
- else
- fname = buf->b_xfilename;
- home_replace(helptail ? buf : NULL, fname, NameBuff, MAXPATHL);
- return NameBuff;
- }
-
- /*
- * set the lnum for the buffer 'buf' and the current window
- */
- static void
- buflist_setlnum(buf, lnum)
- BUF *buf;
- linenr_t lnum;
- {
- WINLNUM *wlp;
-
- for (wlp = buf->b_winlnum; wlp != NULL; wlp = wlp->wl_next)
- if (wlp->wl_win == curwin)
- break;
- if (wlp == NULL) /* make new entry */
- {
- wlp = (WINLNUM *)alloc((unsigned)sizeof(WINLNUM));
- if (wlp == NULL)
- return;
- wlp->wl_win = curwin;
- }
- else /* remove entry from list */
- {
- if (wlp->wl_prev)
- wlp->wl_prev->wl_next = wlp->wl_next;
- else
- buf->b_winlnum = wlp->wl_next;
- if (wlp->wl_next)
- wlp->wl_next->wl_prev = wlp->wl_prev;
- }
- wlp->wl_lnum = lnum;
- /*
- * insert entry in front of the list
- */
- wlp->wl_next = buf->b_winlnum;
- buf->b_winlnum = wlp;
- wlp->wl_prev = NULL;
- if (wlp->wl_next)
- wlp->wl_next->wl_prev = wlp;
-
- return;
- }
-
- /*
- * find the lnum for the buffer 'buf' for the current window
- */
- static linenr_t
- buflist_findlnum(buf)
- BUF *buf;
- {
- WINLNUM *wlp;
-
- for (wlp = buf->b_winlnum; wlp != NULL; wlp = wlp->wl_next)
- if (wlp->wl_win == curwin)
- break;
-
- if (wlp == NULL) /* if no lnum for curwin, use the first in the list */
- wlp = buf->b_winlnum;
-
- if (wlp)
- return wlp->wl_lnum;
- else
- return (linenr_t)1;
- }
-
- /*
- * list all know file names (for :files and :buffers command)
- */
- void
- buflist_list()
- {
- BUF *buf;
- int len;
-
- for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
- {
- msg_outchar('\n');
- if (buf->b_xfilename == NULL)
- STRCPY(NameBuff, "No File");
- else
- /* careful: home_replace calls vim_getenv(), which uses IObuff! */
- home_replace(buf, buf->b_xfilename, NameBuff, MAXPATHL);
-
- sprintf((char *)IObuff, "%3d %c%c%c \"",
- buf->b_fnum,
- buf == curbuf ? '%' :
- (curwin->w_alt_fnum == buf->b_fnum ? '#' : ' '),
- buf->b_ml.ml_mfp == NULL ? '-' :
- (buf->b_nwindows == 0 ? 'h' : ' '),
- buf->b_changed ? '+' : ' ');
-
- len = STRLEN(IObuff);
- STRNCPY(IObuff + len, NameBuff, IOSIZE - 20 - len);
-
- len = STRLEN(IObuff);
- IObuff[len++] = '"';
- /*
- * try to put the "line" strings in column 40
- */
- do
- {
- IObuff[len++] = ' ';
- } while (len < 40 && len < IOSIZE - 18);
- sprintf((char *)IObuff + len, "line %ld",
- buf == curbuf ? curwin->w_cursor.lnum :
- (long)buflist_findlnum(buf));
- msg_outtrans(IObuff);
- flushbuf(); /* output one line at a time */
- mch_breakcheck();
- }
- }
-
- /*
- * get file name and line number for file 'fnum'
- * used by DoOneCmd() for translating '%' and '#'
- * return FAIL if not found, OK for success
- */
- int
- buflist_name_nr(fnum, fname, lnum)
- int fnum;
- char_u **fname;
- linenr_t *lnum;
- {
- BUF *buf;
-
- buf = buflist_findnr(fnum);
- if (buf == NULL || buf->b_filename == NULL)
- return FAIL;
-
- if (did_cd)
- *fname = buf->b_filename;
- else
- *fname = buf->b_sfilename;
- *lnum = buflist_findlnum(buf);
-
- return OK;
- }
-
- /*
- * Set the current file name to 's', short file name to 'ss'.
- * The file name with the full path is also remembered, for when :cd is used.
- * Returns FAIL for failure (file name already in use by other buffer)
- * OK otherwise.
- */
- int
- setfname(fname, sfname, message)
- char_u *fname, *sfname;
- int message;
- {
- BUF *buf;
-
- if (fname == NULL || *fname == NUL)
- {
- vim_free(curbuf->b_filename);
- vim_free(curbuf->b_sfilename);
- curbuf->b_filename = NULL;
- curbuf->b_sfilename = NULL;
- }
- else
- {
- fname_expand(&fname, &sfname);
- #ifdef USE_FNAME_CASE
- # ifdef USE_LONG_FNAME
- if (USE_LONG_FNAME)
- # endif
- fname_case(sfname); /* set correct case for short filename */
- #endif
- /*
- * if the file name is already used in another buffer:
- * - if the buffer is loaded, fail
- * - if the buffer is not loaded, delete it from the list
- */
- buf = buflist_findname(fname);
- if (buf != NULL && buf != curbuf)
- {
- if (buf->b_ml.ml_mfp != NULL) /* it's loaded, fail */
- {
- if (message)
- EMSG("Buffer with this name already exists");
- return FAIL;
- }
- close_buffer(NULL, buf, TRUE, TRUE); /* delete from the list */
- }
- fname = strsave(fname);
- sfname = strsave(sfname);
- if (fname == NULL || sfname == NULL)
- {
- vim_free(sfname);
- vim_free(fname);
- return FAIL;
- }
- vim_free(curbuf->b_filename);
- vim_free(curbuf->b_sfilename);
- curbuf->b_filename = fname;
- curbuf->b_sfilename = sfname;
- }
- if (did_cd)
- curbuf->b_xfilename = curbuf->b_filename;
- else
- curbuf->b_xfilename = curbuf->b_sfilename;
-
- #ifndef SHORT_FNAME
- curbuf->b_shortname = FALSE;
- #endif
- /*
- * If the file name changed, also change the name of the swapfile
- */
- if (curbuf->b_ml.ml_mfp != NULL)
- ml_setname();
-
- check_arg_idx(); /* check file name for arg list */
- maketitle(); /* set window title */
- status_redraw_all(); /* status lines need to be redrawn */
- fmarks_check_names(curbuf); /* check named file marks */
- ml_timestamp(curbuf); /* reset timestamp */
- return OK;
- }
-
- /*
- * set alternate file name for current window
- *
- * Used by do_one_cmd(), do_write() and do_ecmd().
- */
- void
- setaltfname(fname, sfname, lnum)
- char_u *fname;
- char_u *sfname;
- linenr_t lnum;
- {
- BUF *buf;
-
- buf = buflist_new(fname, sfname, lnum, FALSE);
- if (buf != NULL)
- curwin->w_alt_fnum = buf->b_fnum;
- }
-
- /*
- * add a file name to the buflist and return its number
- *
- * used by qf_init(), main() and doarglist()
- */
- int
- buflist_add(fname)
- char_u *fname;
- {
- BUF *buf;
-
- buf = buflist_new(fname, NULL, (linenr_t)0, FALSE);
- if (buf != NULL)
- return buf->b_fnum;
- return 0;
- }
-
- /*
- * set alternate lnum for current window
- */
- void
- buflist_altlnum()
- {
- buflist_setlnum(curbuf, curwin->w_cursor.lnum);
- }
-
- /*
- * return nonzero if 'fname' is not the same file as current file
- * fname must have a full path (expanded by FullName)
- */
- int
- otherfile(fname)
- char_u *fname;
- { /* no name is different */
- if (fname == NULL || *fname == NUL || curbuf->b_filename == NULL)
- return TRUE;
- return fnamecmp(fname, curbuf->b_filename);
- }
-
- void
- fileinfo(fullname, shorthelp, dont_truncate)
- int fullname;
- int shorthelp;
- int dont_truncate;
- {
- char_u *name;
- int n;
- char_u *p;
- char_u *buffer;
-
- buffer = alloc(IOSIZE);
- if (buffer == NULL)
- return;
-
- if (fullname > 1) /* 2 CTRL-G: include buffer number */
- {
- sprintf((char *)buffer, "buf %d: ", curbuf->b_fnum);
- p = buffer + STRLEN(buffer);
- }
- else
- p = buffer;
-
- *p++ = '"';
- if (curbuf->b_filename == NULL)
- STRCPY(p, "No File");
- else
- {
- if (!fullname && curbuf->b_sfilename != NULL)
- name = curbuf->b_sfilename;
- else
- name = curbuf->b_filename;
- home_replace(shorthelp ? curbuf : NULL, name, p,
- (int)(IOSIZE - (p - buffer)));
- }
-
- sprintf((char *)buffer + STRLEN(buffer),
- "\"%s%s%s%s",
- curbuf->b_changed ? (shortmess(SHM_MOD) ?
- " [+]" : " [Modified]") : " ",
- curbuf->b_notedited ? "[Not edited]" : "",
- curbuf->b_p_ro ? (shortmess(SHM_RO) ? "[RO]" : "[readonly]") : "",
- (curbuf->b_changed || curbuf->b_notedited || curbuf->b_p_ro) ?
- " " : "");
- n = (int)(((long)curwin->w_cursor.lnum * 100L) /
- (long)curbuf->b_ml.ml_line_count);
- if (curbuf->b_ml.ml_flags & ML_EMPTY)
- {
- STRCPY(buffer + STRLEN(buffer), no_lines_msg);
- }
- else if (p_ru)
- {
- /* Current line and column are already on the screen -- webb */
- sprintf((char *)buffer + STRLEN(buffer),
- "%ld line%s --%d%%--",
- (long)curbuf->b_ml.ml_line_count,
- plural((long)curbuf->b_ml.ml_line_count),
- n);
- }
- else
- {
- sprintf((char *)buffer + STRLEN(buffer),
- "line %ld of %ld --%d%%-- col ",
- (long)curwin->w_cursor.lnum,
- (long)curbuf->b_ml.ml_line_count,
- n);
- col_print(buffer + STRLEN(buffer),
- (int)curwin->w_cursor.col + 1, (int)curwin->w_virtcol + 1);
- }
-
- (void)append_arg_number(buffer, !shortmess(SHM_FILE), IOSIZE);
-
- if (dont_truncate)
- msg(buffer);
- else
- msg_trunc(buffer);
-
- vim_free(buffer);
- }
-
- /*
- * Give some info about the position of the cursor (for "g CTRL-G").
- */
- void
- cursor_pos_info()
- {
- char_u *p;
- char_u buf1[20];
- char_u buf2[20];
- linenr_t lnum;
- long char_count = 0;
- long char_count_cursor = 0;
- int eol_size;
-
- /*
- * Compute the length of the file in characters.
- */
- if (curbuf->b_ml.ml_flags & ML_EMPTY)
- {
- MSG(no_lines_msg);
- }
- else
- {
- if (curbuf->b_p_tx)
- eol_size = 2;
- else
- eol_size = 1;
- for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count; ++lnum)
- {
- if (lnum == curwin->w_cursor.lnum)
- char_count_cursor = char_count + curwin->w_cursor.col + 1;
- char_count += STRLEN(ml_get(lnum)) + eol_size;
- }
- if (!curbuf->b_p_eol && curbuf->b_p_bin)
- char_count -= eol_size;
-
- p = ml_get_curline();
- col_print(buf1, (int)curwin->w_cursor.col + 1, (int)curwin->w_virtcol + 1);
- col_print(buf2, (int)STRLEN(p), linetabsize(p));
-
- sprintf((char *)IObuff, "Col %s of %s; Line %ld of %ld; Char %ld of %ld",
- (char *)buf1, (char *)buf2,
- (long)curwin->w_cursor.lnum, (long)curbuf->b_ml.ml_line_count,
- char_count_cursor, char_count);
- msg(IObuff);
- }
- }
-
- void
- col_print(buf, col, vcol)
- char_u *buf;
- int col;
- int vcol;
- {
- if (col == vcol)
- sprintf((char *)buf, "%d", col);
- else
- sprintf((char *)buf, "%d-%d", col, vcol);
- }
-
- /*
- * put filename in title bar of window and in icon title
- */
-
- static char_u *lasttitle = NULL;
- static char_u *lasticon = NULL;
-
- void
- maketitle()
- {
- char_u *t_name;
- char_u *i_name;
- int maxlen;
- int len;
-
- if (curbuf->b_filename == NULL)
- {
- t_name = (char_u *)"VIM -";
- i_name = (char_u *)"No File";
- }
- else
- {
- STRCPY(IObuff, "VIM - ");
- home_replace(curbuf, curbuf->b_filename, IObuff + 6, IOSIZE - 6);
- append_arg_number(IObuff, FALSE, IOSIZE);
- if (p_titlelen > 0)
- {
- maxlen = p_titlelen * Columns / 100;
- if (maxlen < 10)
- maxlen = 10;
- len = STRLEN(IObuff);
- if (len > maxlen)
- {
- vim_memmove(IObuff + 6, IObuff + 6 + len - maxlen,
- (size_t)maxlen - 5);
- IObuff[5] = '<';
- }
- }
- t_name = IObuff;
- i_name = gettail(curbuf->b_filename); /* use filename only for icon */
- }
-
- vim_free(lasttitle);
- if (p_title && (lasttitle = alloc((unsigned)(strsize(t_name) + 1))) != NULL)
- {
- *lasttitle = NUL;
- while (*t_name)
- STRCAT(lasttitle, transchar(*t_name++));
- }
- else
- lasttitle = NULL;
-
- vim_free(lasticon);
- if (p_icon && (lasticon = alloc((unsigned)(strsize(i_name) + 1))) != NULL)
- {
- *lasticon = NUL;
- while (*i_name)
- STRCAT(lasticon, transchar(*i_name++));
- }
- else
- lasticon = NULL;
-
- resettitle();
- }
-
- /*
- * Append (file 2 of 8) to 'buf', if editing more than one file.
- * Return TRUE if it was appended.
- */
- static int
- append_arg_number(buf, add_file, maxlen)
- char_u *buf;
- int add_file; /* Add "file" before the arg number */
- int maxlen; /* maximum nr of chars in buf */
- {
- char_u *p;
-
- if (arg_count <= 1) /* nothing to do */
- return FALSE;
-
- p = buf + STRLEN(buf); /* go to the end of the buffer */
- if (p - buf + 35 >= maxlen) /* getting too long */
- return FALSE;
- *p++ = ' ';
- *p++ = '(';
- if (add_file)
- {
- STRCPY(p, "file ");
- p += 5;
- }
- sprintf((char *)p, curwin->w_arg_idx_invalid ? "(%d) of %d)" :
- "%d of %d)", curwin->w_arg_idx + 1, arg_count);
- return TRUE;
- }
-
- /*
- * Put current window title back (used after calling a shell)
- */
- void
- resettitle()
- {
- mch_settitle(lasttitle, lasticon);
- }
-
- /*
- * If fname is not a full path, make it a full path
- */
- char_u *
- fix_fname(fname)
- char_u *fname;
- {
- if (fname != NameBuff) /* if not already expanded */
- {
- if (!isFullName(fname))
- {
- (void)FullName(fname, NameBuff, MAXPATHL, FALSE);
- fname = NameBuff;
- }
- #ifdef USE_FNAME_CASE
- else
- # ifdef USE_LONG_FNAME
- if (USE_LONG_FNAME)
- # endif
- {
- STRNCPY(NameBuff, fname, MAXPATHL); /* make copy, it may change */
- fname = NameBuff;
- fname_case(fname); /* set correct case for filename */
- }
- #endif
- }
- return fname;
- }
-
- /*
- * make fname a full file name, set sfname to fname if not NULL
- */
- void
- fname_expand(fname, sfname)
- char_u **fname;
- char_u **sfname;
- {
- if (*fname == NULL) /* if no file name given, nothing to do */
- return;
- if (*sfname == NULL) /* if no short file name given, use fname */
- *sfname = *fname;
- *fname = fix_fname(*fname); /* expand to full path */
- }
-
- /*
- * do_arg_all: open up to 'count' windows, one for each argument
- */
- void
- do_arg_all(count)
- int count;
- {
- int i;
-
- if (arg_count <= 1)
- {
- /* Don't give this obvious error message. We don't want it when the
- * ":all" command is in the .vimrc. */
- /* EMSG("Argument list contains less than 2 files"); */
- return;
- }
-
- /*
- * 1. close all but first window
- * 2. make the desired number of windows
- * 3. start editing one file in each window
- * arg_count may change while doing this, because of autocommands.
- */
- setpcmark();
- close_others(FALSE);
- curwin->w_arg_idx = 0;
- if (count > arg_count || count <= 0)
- count = arg_count;
- count = make_windows(count);
-
- #ifdef AUTOCMD
- /*
- * Don't execute Win/Buf Enter/Leave autocommands here
- */
- ++autocmd_no_enter;
- ++autocmd_no_leave;
- #endif
- for (i = 0; i < count && i < arg_count && !got_int; ++i)
- {
- if (i == arg_count - 1)
- arg_had_last = TRUE;
- curwin->w_arg_idx = i;
- #ifdef AUTOCMD
- if (i == 0) /* first window: do autocmd for leaving this buffer */
- --autocmd_no_leave;
- #endif
- /* edit file i */
- (void)do_ecmd(0, arg_files[i], NULL, NULL, (linenr_t)1,
- ECMD_HIDE + ECMD_OLDBUF);
- #ifdef AUTOCMD
- if (i == 0)
- ++autocmd_no_leave;
- #endif
- if (curwin->w_next == NULL) /* just checking */
- break;
- win_enter(curwin->w_next, FALSE);
- mch_breakcheck();
- }
- #ifdef AUTOCMD
- --autocmd_no_enter;
- #endif
- win_enter(firstwin, FALSE); /* back to first window */
- #ifdef AUTOCMD
- --autocmd_no_leave;
- #endif
- }
-
- /*
- * do_buffer_all: open a window for each buffer
- *
- * 'count' is the maximum number of windows to open.
- * when 'all' is TRUE, also load inactive buffers
- */
- void
- do_buffer_all(count, all)
- int count;
- int all;
- {
- int buf_count;
- BUF *buf;
- int i;
-
- /*
- * count number of desired windows
- */
- buf_count = 0;
- for (buf = firstbuf; buf != NULL; buf = buf->b_next)
- if (all || buf->b_ml.ml_mfp != NULL)
- ++buf_count;
-
- if (buf_count == 0) /* Cannot happen? */
- {
- EMSG("No relevant entries in buffer list");
- return;
- }
-
- /*
- * 1. close all but first window
- * 2. make the desired number of windows
- * 3. stuff commands to fill the windows
- * Watch out for autocommands that delete buffers or windows.
- */
- close_others(FALSE);
- curwin->w_arg_idx = 0;
- if (buf_count > count)
- buf_count = count;
- buf_count = make_windows(buf_count);
-
- #ifdef AUTOCMD
- /*
- * Don't execute Win/Buf Enter/Leave autocommands here
- */
- ++autocmd_no_enter;
- ++autocmd_no_leave;
- #endif
- buf = firstbuf;
- for (i = 0; i < buf_count; ++i)
- {
- /* find buffer number to put in this window */
- for ( ; buf != NULL; buf = buf->b_next)
- if (all || buf->b_ml.ml_mfp != NULL)
- break;
- if (buf == NULL) /* Cannot happen? */
- break;
-
- /* advance to next window */
- if (i != 0)
- {
- if (curwin->w_next == NULL) /* just checking */
- break;
- win_enter(curwin->w_next, FALSE);
- }
-
- #ifdef AUTOCMD
- if (i == 0) /* first window: do autocmd for leaving this buffer */
- --autocmd_no_leave;
- #endif
-
- /* get buffer for this window */
- (void)do_buffer(DOBUF_GOTO, DOBUF_FIRST, FORWARD, (int)buf->b_fnum, 0);
- #ifdef AUTOCMD
- if (i == 0)
- ++autocmd_no_leave;
- if (!buf_valid(buf)) /* autocommands deleted the buffer!!! */
- break;
- #endif
-
- mch_breakcheck();
- if (got_int)
- {
- (void)vgetc(); /* only break the file loading, not the rest */
- break;
- }
- buf = buf->b_next;
- }
- #ifdef AUTOCMD
- --autocmd_no_enter;
- #endif
- win_enter(firstwin, FALSE); /* back to first window */
- #ifdef AUTOCMD
- --autocmd_no_leave;
- #endif
- if (buf_count > 1)
- win_equal(curwin, FALSE); /* adjust heights */
- }
-
- /*
- * do_modelines() - process mode lines for the current file
- *
- * Returns immediately if the "ml" option isn't set.
- */
- static int chk_modeline __ARGS((linenr_t));
-
- void
- do_modelines()
- {
- linenr_t lnum;
- int nmlines;
-
- if (!curbuf->b_p_ml || (nmlines = (int)p_mls) == 0)
- return;
-
- for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count && lnum <= nmlines;
- ++lnum)
- if (chk_modeline(lnum) == FAIL)
- nmlines = 0;
-
- for (lnum = curbuf->b_ml.ml_line_count; lnum > 0 && lnum > nmlines &&
- lnum > curbuf->b_ml.ml_line_count - nmlines; --lnum)
- if (chk_modeline(lnum) == FAIL)
- nmlines = 0;
- }
-
- /*
- * chk_modeline() - check a single line for a mode string
- * Return FAIL if an error encountered.
- */
- static int
- chk_modeline(lnum)
- linenr_t lnum;
- {
- register char_u *s;
- register char_u *e;
- char_u *linecopy; /* local copy of any modeline found */
- int prev;
- int end;
- int retval = OK;
- char_u *save_sourcing_name;
-
- prev = -1;
- for (s = ml_get(lnum); *s != NUL; ++s)
- {
- if (prev == -1 || vim_isspace(prev))
- {
- if ((prev != -1 && STRNCMP(s, "ex:", (size_t)3) == 0) ||
- STRNCMP(s, "vi:", (size_t)3) == 0 ||
- STRNCMP(s, "vim:", (size_t)4) == 0)
- break;
- }
- prev = *s;
- }
-
- if (*s)
- {
- do /* skip over "ex:", "vi:" or "vim:" */
- ++s;
- while (s[-1] != ':');
-
- s = linecopy = strsave(s); /* copy the line, it will change */
- if (linecopy == NULL)
- return FAIL;
-
- sourcing_lnum = lnum; /* prepare for emsg() */
- save_sourcing_name = sourcing_name;
- sourcing_name = (char_u *)"modelines";
-
- end = FALSE;
- while (end == FALSE)
- {
- s = skipwhite(s);
- if (*s == NUL)
- break;
-
- /*
- * Find end of set command: ':' or end of line.
- */
- for (e = s; (*e != ':' || *(e - 1) == '\\') && *e != NUL; ++e)
- ;
- if (*e == NUL)
- end = TRUE;
-
- /*
- * If there is a "set" command, require a terminating ':' and
- * ignore the stuff after the ':'.
- * "vi:set opt opt opt: foo" -- foo not interpreted
- * "vi:opt opt opt: foo" -- foo interpreted
- */
- if (STRNCMP(s, "set ", (size_t)4) == 0)
- {
- if (*e != ':') /* no terminating ':'? */
- break;
- end = TRUE;
- s += 4;
- }
-
- *e = NUL; /* truncate the set command */
- if (do_set(s) == FAIL) /* stop if error found */
- {
- retval = FAIL;
- break;
- }
- s = e + 1; /* advance to next part */
- }
-
- sourcing_lnum = 0;
- sourcing_name = save_sourcing_name;
-
- vim_free(linecopy);
- }
- return retval;
- }
-