示例#1
0
文件: mark.c 项目: hightoon/neovim
/*
 * 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);
      vim_strncpy(NameBuff + len, fm->fname + 2, MAXPATHL - len - 1);
    } else
      vim_strncpy(NameBuff, fm->fname, MAXPATHL - 1);

    /* 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);
  }
}
示例#2
0
文件: env.c 项目: phodge/neovim
void init_homedir(void)
{
  // In case we are called a second time.
  xfree(homedir);
  homedir = NULL;

  const char *var = os_getenv("HOME");

#ifdef WIN32
  // Typically, $HOME is not defined on Windows, unless the user has
  // specifically defined it for Vim's sake. However, on Windows NT
  // platforms, $HOMEDRIVE and $HOMEPATH are automatically defined for
  // each user. Try constructing $HOME from these.
  if (var == NULL) {
    const char *homedrive = os_getenv("HOMEDRIVE");
    const char *homepath = os_getenv("HOMEPATH");
    if (homepath == NULL) {
        homepath = "\\";
    }
    if (homedrive != NULL && strlen(homedrive) + strlen(homepath) < MAXPATHL) {
      snprintf(os_buf, MAXPATHL, "%s%s", homedrive, homepath);
      if (os_buf[0] != NUL) {
        var = os_buf;
        vim_setenv("HOME", os_buf);
      }
    }
  }
#endif

  if (var != NULL) {
#ifdef UNIX
    // Change to the directory and get the actual path.  This resolves
    // links.  Don't do it when we can't return.
    if (os_dirname((char_u *)os_buf, MAXPATHL) == OK && os_chdir(os_buf) == 0) {
      if (!os_chdir(var) && os_dirname(IObuff, IOSIZE) == OK) {
        var = (char *)IObuff;
      }
      if (os_chdir(os_buf) != 0) {
        EMSG(_(e_prev_dir));
      }
    }
#endif
    homedir = xstrdup(var);
  }
}
示例#3
0
文件: fs.c 项目: ashleyh/neovim
/// Get the absolute name of the given relative directory.
///
/// @param directory Directory name, relative to current directory.
/// @return `FAIL` for failure, `OK` for success.
int os_full_dir_name(char *directory, char *buffer, int len)
{
  int retval = OK;

  if (STRLEN(directory) == 0) {
    return os_dirname((char_u *) buffer, len);
  }

  char old_dir[MAXPATHL];

  // Get current directory name.
  if (os_dirname((char_u *) old_dir, MAXPATHL) == FAIL) {
    return FAIL;
  }

  // We have to get back to the current dir at the end, check if that works.
  if (os_chdir(old_dir) != 0) {
    return FAIL;
  }

  if (os_chdir(directory) != 0) {
    // Do not return immediatly since we may be in the wrong directory.
    retval = FAIL;
  }

  if (retval == FAIL || os_dirname((char_u *) buffer, len) == FAIL) {
    // Do not return immediatly since we are in the wrong directory.
    retval = FAIL;
  }

  if (os_chdir(old_dir) != 0) {
    // That shouldn't happen, since we've tested if it works.
    retval = FAIL;
    EMSG(_(e_prev_dir));
  }

  return retval;
}
示例#4
0
/*
 * Find a file in a search context.
 * The search context was created with vim_findfile_init() above.
 * Return a pointer to an allocated file name or NULL if nothing found.
 * To get all matching files call this function until you get NULL.
 *
 * If the passed search_context is NULL, NULL is returned.
 *
 * The search algorithm is depth first. To change this replace the
 * stack with a list (don't forget to leave partly searched directories on the
 * top of the list).
 */
char_u *vim_findfile(void *search_ctx_arg)
{
  char_u      *file_path;
  char_u      *rest_of_wildcards;
  char_u      *path_end = NULL;
  ff_stack_T  *stackp;
  int len;
  int i;
  char_u      *p;
  char_u      *suf;
  ff_search_ctx_T *search_ctx;

  if (search_ctx_arg == NULL)
    return NULL;

  search_ctx = (ff_search_ctx_T *)search_ctx_arg;

  /*
   * filepath is used as buffer for various actions and as the storage to
   * return a found filename.
   */
  file_path = xmalloc(MAXPATHL);

  /* store the end of the start dir -- needed for upward search */
  if (search_ctx->ffsc_start_dir != NULL)
    path_end = &search_ctx->ffsc_start_dir[
      STRLEN(search_ctx->ffsc_start_dir)];

  /* upward search loop */
  for (;; ) {
    /* downward search loop */
    for (;; ) {
      /* check if user user wants to stop the search*/
      ui_breakcheck();
      if (got_int)
        break;

      /* get directory to work on from stack */
      stackp = ff_pop(search_ctx);
      if (stackp == NULL)
        break;

      /*
       * TODO: decide if we leave this test in
       *
       * GOOD: don't search a directory(-tree) twice.
       * BAD:  - check linked list for every new directory entered.
       *       - check for double files also done below
       *
       * Here we check if we already searched this directory.
       * We already searched a directory if:
       * 1) The directory is the same.
       * 2) We would use the same wildcard string.
       *
       * Good if you have links on same directory via several ways
       *  or you have selfreferences in directories (e.g. SuSE Linux 6.3:
       *  /etc/rc.d/init.d is linked to /etc/rc.d -> endless loop)
       *
       * This check is only needed for directories we work on for the
       * first time (hence stackp->ff_filearray == NULL)
       */
      if (stackp->ffs_filearray == NULL
          && ff_check_visited(&search_ctx->ffsc_dir_visited_list
              ->ffvl_visited_list,
              stackp->ffs_fix_path
              , stackp->ffs_wc_path
              ) == FAIL) {
#ifdef FF_VERBOSE
        if (p_verbose >= 5) {
          verbose_enter_scroll();
          smsg((char_u *)"Already Searched: %s (%s)",
              stackp->ffs_fix_path, stackp->ffs_wc_path);
          /* don't overwrite this either */
          msg_puts((char_u *)"\n");
          verbose_leave_scroll();
        }
#endif
        ff_free_stack_element(stackp);
        continue;
      }
#ifdef FF_VERBOSE
      else if (p_verbose >= 5) {
        verbose_enter_scroll();
        smsg((char_u *)"Searching: %s (%s)",
            stackp->ffs_fix_path, stackp->ffs_wc_path);
        /* don't overwrite this either */
        msg_puts((char_u *)"\n");
        verbose_leave_scroll();
      }
#endif

      /* check depth */
      if (stackp->ffs_level <= 0) {
        ff_free_stack_element(stackp);
        continue;
      }

      file_path[0] = NUL;

      /*
       * If no filearray till now expand wildcards
       * The function expand_wildcards() can handle an array of paths
       * and all possible expands are returned in one array. We use this
       * to handle the expansion of '**' into an empty string.
       */
      if (stackp->ffs_filearray == NULL) {
        char_u *dirptrs[2];

        /* we use filepath to build the path expand_wildcards() should
         * expand.
         */
        dirptrs[0] = file_path;
        dirptrs[1] = NULL;

        /* if we have a start dir copy it in */
        if (!vim_isAbsName(stackp->ffs_fix_path)
            && search_ctx->ffsc_start_dir) {
          STRCPY(file_path, search_ctx->ffsc_start_dir);
          add_pathsep(file_path);
        }

        /* append the fix part of the search path */
        STRCAT(file_path, stackp->ffs_fix_path);
        add_pathsep(file_path);

        rest_of_wildcards = stackp->ffs_wc_path;
        if (*rest_of_wildcards != NUL) {
          len = (int)STRLEN(file_path);
          if (STRNCMP(rest_of_wildcards, "**", 2) == 0) {
            /* pointer to the restrict byte
             * The restrict byte is not a character!
             */
            p = rest_of_wildcards + 2;

            if (*p > 0) {
              (*p)--;
              file_path[len++] = '*';
            }

            if (*p == 0) {
              /* remove '**<numb> from wildcards */
              STRMOVE(rest_of_wildcards, rest_of_wildcards + 3);
            } else
              rest_of_wildcards += 3;

            if (stackp->ffs_star_star_empty == 0) {
              /* if not done before, expand '**' to empty */
              stackp->ffs_star_star_empty = 1;
              dirptrs[1] = stackp->ffs_fix_path;
            }
          }

          /*
           * Here we copy until the next path separator or the end of
           * the path. If we stop at a path separator, there is
           * still something else left. This is handled below by
           * pushing every directory returned from expand_wildcards()
           * on the stack again for further search.
           */
          while (*rest_of_wildcards
                 && !vim_ispathsep(*rest_of_wildcards))
            file_path[len++] = *rest_of_wildcards++;

          file_path[len] = NUL;
          if (vim_ispathsep(*rest_of_wildcards))
            rest_of_wildcards++;
        }

        /*
         * Expand wildcards like "*" and "$VAR".
         * If the path is a URL don't try this.
         */
        if (path_with_url(dirptrs[0])) {
          stackp->ffs_filearray = (char_u **)xmalloc(sizeof(char *));
          stackp->ffs_filearray[0] = vim_strsave(dirptrs[0]);
          stackp->ffs_filearray_size = 1;
        } else
          /* Add EW_NOTWILD because the expanded path may contain
           * wildcard characters that are to be taken literally.
           * This is a bit of a hack. */
          expand_wildcards((dirptrs[1] == NULL) ? 1 : 2, dirptrs,
              &stackp->ffs_filearray_size,
              &stackp->ffs_filearray,
              EW_DIR|EW_ADDSLASH|EW_SILENT|EW_NOTWILD);

        stackp->ffs_filearray_cur = 0;
        stackp->ffs_stage = 0;
      } else
        rest_of_wildcards = &stackp->ffs_wc_path[
          STRLEN(stackp->ffs_wc_path)];

      if (stackp->ffs_stage == 0) {
        /* this is the first time we work on this directory */
        if (*rest_of_wildcards == NUL) {
          /*
           * We don't have further wildcards to expand, so we have to
           * check for the final file now.
           */
          for (i = stackp->ffs_filearray_cur;
               i < stackp->ffs_filearray_size; ++i) {
            if (!path_with_url(stackp->ffs_filearray[i])
                && !os_isdir(stackp->ffs_filearray[i]))
              continue;                 /* not a directory */

            /* prepare the filename to be checked for existence
             * below */
            STRCPY(file_path, stackp->ffs_filearray[i]);
            add_pathsep(file_path);
            STRCAT(file_path, search_ctx->ffsc_file_to_search);

            /*
             * Try without extra suffix and then with suffixes
             * from 'suffixesadd'.
             */
            len = (int)STRLEN(file_path);
            if (search_ctx->ffsc_tagfile)
              suf = (char_u *)"";
            else
              suf = curbuf->b_p_sua;
            for (;; ) {
              /* if file exists and we didn't already find it */
              if ((path_with_url(file_path)
                   || (os_file_exists(file_path)
                       && (search_ctx->ffsc_find_what
                           == FINDFILE_BOTH
                           || ((search_ctx->ffsc_find_what
                                == FINDFILE_DIR)
                               == os_isdir(file_path)))))
#ifndef FF_VERBOSE
                  && (ff_check_visited(
                          &search_ctx->ffsc_visited_list->ffvl_visited_list,
                          file_path
                          , (char_u *)""
                          ) == OK)
#endif
                  ) {
#ifdef FF_VERBOSE
                if (ff_check_visited(
                        &search_ctx->ffsc_visited_list->ffvl_visited_list,
                        file_path
                        , (char_u *)""
                        ) == FAIL) {
                  if (p_verbose >= 5) {
                    verbose_enter_scroll();
                    smsg((char_u *)"Already: %s",
                        file_path);
                    /* don't overwrite this either */
                    msg_puts((char_u *)"\n");
                    verbose_leave_scroll();
                  }
                  continue;
                }
#endif

                /* push dir to examine rest of subdirs later */
                stackp->ffs_filearray_cur = i + 1;
                ff_push(search_ctx, stackp);

                if (!path_with_url(file_path))
                  simplify_filename(file_path);
                if (os_dirname(ff_expand_buffer, MAXPATHL)
                    == OK) {
                  p = path_shorten_fname(file_path,
                      ff_expand_buffer);
                  if (p != NULL)
                    STRMOVE(file_path, p);
                }
#ifdef FF_VERBOSE
                if (p_verbose >= 5) {
                  verbose_enter_scroll();
                  smsg((char_u *)"HIT: %s", file_path);
                  /* don't overwrite this either */
                  msg_puts((char_u *)"\n");
                  verbose_leave_scroll();
                }
#endif
                return file_path;
              }

              /* Not found or found already, try next suffix. */
              if (*suf == NUL)
                break;
              copy_option_part(&suf, file_path + len,
                  MAXPATHL - len, ",");
            }
          }
        } else {
          /*
           * still wildcards left, push the directories for further
           * search
           */
          for (i = stackp->ffs_filearray_cur;
               i < stackp->ffs_filearray_size; ++i) {
            if (!os_isdir(stackp->ffs_filearray[i]))
              continue;                 /* not a directory */

            ff_push(search_ctx,
                ff_create_stack_element(
                    stackp->ffs_filearray[i],
                    rest_of_wildcards,
                    stackp->ffs_level - 1, 0));
          }
        }
        stackp->ffs_filearray_cur = 0;
        stackp->ffs_stage = 1;
      }

      /*
       * if wildcards contains '**' we have to descent till we reach the
       * leaves of the directory tree.
       */
      if (STRNCMP(stackp->ffs_wc_path, "**", 2) == 0) {
        for (i = stackp->ffs_filearray_cur;
             i < stackp->ffs_filearray_size; ++i) {
          if (fnamecmp(stackp->ffs_filearray[i],
                  stackp->ffs_fix_path) == 0)
            continue;             /* don't repush same directory */
          if (!os_isdir(stackp->ffs_filearray[i]))
            continue;               /* not a directory */
          ff_push(search_ctx,
              ff_create_stack_element(stackp->ffs_filearray[i],
                  stackp->ffs_wc_path, stackp->ffs_level - 1, 1));
        }
      }

      /* we are done with the current directory */
      ff_free_stack_element(stackp);

    }

    /* If we reached this, we didn't find anything downwards.
     * Let's check if we should do an upward search.
     */
    if (search_ctx->ffsc_start_dir
        && search_ctx->ffsc_stopdirs_v != NULL && !got_int) {
      ff_stack_T  *sptr;

      /* is the last starting directory in the stop list? */
      if (ff_path_in_stoplist(search_ctx->ffsc_start_dir,
              (int)(path_end - search_ctx->ffsc_start_dir),
              search_ctx->ffsc_stopdirs_v) == TRUE)
        break;

      /* cut of last dir */
      while (path_end > search_ctx->ffsc_start_dir
             && vim_ispathsep(*path_end))
        path_end--;
      while (path_end > search_ctx->ffsc_start_dir
             && !vim_ispathsep(path_end[-1]))
        path_end--;
      *path_end = 0;
      path_end--;

      if (*search_ctx->ffsc_start_dir == 0)
        break;

      STRCPY(file_path, search_ctx->ffsc_start_dir);
      add_pathsep(file_path);
      STRCAT(file_path, search_ctx->ffsc_fix_path);

      /* create a new stack entry */
      sptr = ff_create_stack_element(file_path,
          search_ctx->ffsc_wc_path, search_ctx->ffsc_level, 0);
      ff_push(search_ctx, sptr);
    } else
      break;
  }

  free(file_path);
  return NULL;
}
示例#5
0
/*
 * Initialization routine for vim_findfile().
 *
 * Returns the newly allocated search context or NULL if an error occurred.
 *
 * Don't forget to clean up by calling vim_findfile_cleanup() if you are done
 * with the search context.
 *
 * Find the file 'filename' in the directory 'path'.
 * The parameter 'path' may contain wildcards. If so only search 'level'
 * directories deep. The parameter 'level' is the absolute maximum and is
 * not related to restricts given to the '**' wildcard. If 'level' is 100
 * and you use '**200' vim_findfile() will stop after 100 levels.
 *
 * 'filename' cannot contain wildcards!  It is used as-is, no backslashes to
 * escape special characters.
 *
 * If 'stopdirs' is not NULL and nothing is found downward, the search is
 * restarted on the next higher directory level. This is repeated until the
 * start-directory of a search is contained in 'stopdirs'. 'stopdirs' has the
 * format ";*<dirname>*\(;<dirname>\)*;\=$".
 *
 * If the 'path' is relative, the starting dir for the search is either VIM's
 * current dir or if the path starts with "./" the current files dir.
 * If the 'path' is absolute, the starting dir is that part of the path before
 * the first wildcard.
 *
 * Upward search is only done on the starting dir.
 *
 * If 'free_visited' is TRUE the list of already visited files/directories is
 * cleared. Set this to FALSE if you just want to search from another
 * directory, but want to be sure that no directory from a previous search is
 * searched again. This is useful if you search for a file at different places.
 * The list of visited files/dirs can also be cleared with the function
 * vim_findfile_free_visited().
 *
 * Set the parameter 'find_what' to FINDFILE_DIR if you want to search for
 * directories only, FINDFILE_FILE for files only, FINDFILE_BOTH for both.
 *
 * A search context returned by a previous call to vim_findfile_init() can be
 * passed in the parameter "search_ctx_arg".  This context is reused and
 * reinitialized with the new parameters.  The list of already visited
 * directories from this context is only deleted if the parameter
 * "free_visited" is true.  Be aware that the passed "search_ctx_arg" is freed
 * if the reinitialization fails.
 *
 * If you don't have a search context from a previous call "search_ctx_arg"
 * must be NULL.
 *
 * This function silently ignores a few errors, vim_findfile() will have
 * limited functionality then.
 */
void *
vim_findfile_init (
    char_u *path,
    char_u *filename,
    char_u *stopdirs,
    int level,
    int free_visited,
    int find_what,
    void *search_ctx_arg,
    int tagfile,                    /* expanding names of tags files */
    char_u *rel_fname         /* file name to use for "." */
)
{
  char_u              *wc_part;
  ff_stack_T          *sptr;
  ff_search_ctx_T     *search_ctx;

  /* If a search context is given by the caller, reuse it, else allocate a
   * new one.
   */
  if (search_ctx_arg != NULL)
    search_ctx = search_ctx_arg;
  else {
    search_ctx = xcalloc(1, sizeof(ff_search_ctx_T));
  }
  search_ctx->ffsc_find_what = find_what;
  search_ctx->ffsc_tagfile = tagfile;

  /* clear the search context, but NOT the visited lists */
  ff_clear(search_ctx);

  /* clear visited list if wanted */
  if (free_visited == TRUE)
    vim_findfile_free_visited(search_ctx);
  else {
    /* Reuse old visited lists. Get the visited list for the given
     * filename. If no list for the current filename exists, creates a new
     * one. */
    search_ctx->ffsc_visited_list = ff_get_visited_list(filename,
        &search_ctx->ffsc_visited_lists_list);
    if (search_ctx->ffsc_visited_list == NULL)
      goto error_return;
    search_ctx->ffsc_dir_visited_list = ff_get_visited_list(filename,
        &search_ctx->ffsc_dir_visited_lists_list);
    if (search_ctx->ffsc_dir_visited_list == NULL)
      goto error_return;
  }

  if (ff_expand_buffer == NULL) {
    ff_expand_buffer = xmalloc(MAXPATHL);
  }

  /* Store information on starting dir now if path is relative.
   * If path is absolute, we do that later.  */
  if (path[0] == '.'
      && (vim_ispathsep(path[1]) || path[1] == NUL)
      && (!tagfile || vim_strchr(p_cpo, CPO_DOTTAG) == NULL)
      && rel_fname != NULL) {
    int len = (int)(path_tail(rel_fname) - rel_fname);

    if (!vim_isAbsName(rel_fname) && len + 1 < MAXPATHL) {
      /* Make the start dir an absolute path name. */
      STRLCPY(ff_expand_buffer, rel_fname, len + 1);
      search_ctx->ffsc_start_dir = FullName_save(ff_expand_buffer, FALSE);
    } else
      search_ctx->ffsc_start_dir = vim_strnsave(rel_fname, len);
    if (*++path != NUL)
      ++path;
  } else if (*path == NUL || !vim_isAbsName(path)) {
#ifdef BACKSLASH_IN_FILENAME
    /* "c:dir" needs "c:" to be expanded, otherwise use current dir */
    if (*path != NUL && path[1] == ':') {
      char_u drive[3];

      drive[0] = path[0];
      drive[1] = ':';
      drive[2] = NUL;
      if (vim_FullName(drive, ff_expand_buffer, MAXPATHL, TRUE) == FAIL)
        goto error_return;
      path += 2;
    } else
#endif
    if (os_dirname(ff_expand_buffer, MAXPATHL) == FAIL)
      goto error_return;

    search_ctx->ffsc_start_dir = vim_strsave(ff_expand_buffer);

#ifdef BACKSLASH_IN_FILENAME
    /* A path that starts with "/dir" is relative to the drive, not to the
     * directory (but not for "//machine/dir").  Only use the drive name. */
    if ((*path == '/' || *path == '\\')
        && path[1] != path[0]
        && search_ctx->ffsc_start_dir[1] == ':')
      search_ctx->ffsc_start_dir[2] = NUL;
#endif
  }

  /*
   * If stopdirs are given, split them into an array of pointers.
   * If this fails (mem allocation), there is no upward search at all or a
   * stop directory is not recognized -> continue silently.
   * If stopdirs just contains a ";" or is empty,
   * search_ctx->ffsc_stopdirs_v will only contain a  NULL pointer. This
   * is handled as unlimited upward search.  See function
   * ff_path_in_stoplist() for details.
   */
  if (stopdirs != NULL) {
    char_u  *walker = stopdirs;
    int dircount;

    while (*walker == ';')
      walker++;

    dircount = 1;
    search_ctx->ffsc_stopdirs_v = xmalloc(sizeof(char_u *));

    do {
      char_u  *helper;
      void    *ptr;

      helper = walker;
      ptr = xrealloc(search_ctx->ffsc_stopdirs_v,
          (dircount + 1) * sizeof(char_u *));
      search_ctx->ffsc_stopdirs_v = ptr;
      walker = vim_strchr(walker, ';');
      if (walker) {
        search_ctx->ffsc_stopdirs_v[dircount-1] =
          vim_strnsave(helper, (int)(walker - helper));
        walker++;
      } else
        /* this might be "", which means ascent till top
         * of directory tree.
         */
        search_ctx->ffsc_stopdirs_v[dircount-1] =
          vim_strsave(helper);

      dircount++;

    } while (walker != NULL);
    search_ctx->ffsc_stopdirs_v[dircount-1] = NULL;
  }

  search_ctx->ffsc_level = level;

  /* split into:
   *  -fix path
   *  -wildcard_stuff (might be NULL)
   */
  wc_part = vim_strchr(path, '*');
  if (wc_part != NULL) {
    int llevel;
    int len;
    char    *errpt;

    /* save the fix part of the path */
    search_ctx->ffsc_fix_path = vim_strnsave(path, (int)(wc_part - path));

    /*
     * copy wc_path and add restricts to the '**' wildcard.
     * The octet after a '**' is used as a (binary) counter.
     * So '**3' is transposed to '**^C' ('^C' is ASCII value 3)
     * or '**76' is transposed to '**N'( 'N' is ASCII value 76).
     * For EBCDIC you get different character values.
     * If no restrict is given after '**' the default is used.
     * Due to this technique the path looks awful if you print it as a
     * string.
     */
    len = 0;
    while (*wc_part != NUL) {
      if (len + 5 >= MAXPATHL) {
        EMSG(_(e_pathtoolong));
        break;
      }
      if (STRNCMP(wc_part, "**", 2) == 0) {
        ff_expand_buffer[len++] = *wc_part++;
        ff_expand_buffer[len++] = *wc_part++;

        llevel = strtol((char *)wc_part, &errpt, 10);
        if ((char_u *)errpt != wc_part && llevel > 0 && llevel < 255)
          ff_expand_buffer[len++] = llevel;
        else if ((char_u *)errpt != wc_part && llevel == 0)
          /* restrict is 0 -> remove already added '**' */
          len -= 2;
        else
          ff_expand_buffer[len++] = FF_MAX_STAR_STAR_EXPAND;
        wc_part = (char_u *)errpt;
        if (*wc_part != NUL && !vim_ispathsep(*wc_part)) {
          EMSG2(_(
                  "E343: Invalid path: '**[number]' must be at the end of the path or be followed by '%s'."),
              PATHSEPSTR);
          goto error_return;
        }
      } else
        ff_expand_buffer[len++] = *wc_part++;
    }
    ff_expand_buffer[len] = NUL;
    search_ctx->ffsc_wc_path = vim_strsave(ff_expand_buffer);
  } else
    search_ctx->ffsc_fix_path = vim_strsave(path);

  if (search_ctx->ffsc_start_dir == NULL) {
    /* store the fix part as startdir.
     * This is needed if the parameter path is fully qualified.
     */
    search_ctx->ffsc_start_dir = vim_strsave(search_ctx->ffsc_fix_path);
    search_ctx->ffsc_fix_path[0] = NUL;
  }

  /* create an absolute path */
  if (STRLEN(search_ctx->ffsc_start_dir)
      + STRLEN(search_ctx->ffsc_fix_path) + 3 >= MAXPATHL) {
    EMSG(_(e_pathtoolong));
    goto error_return;
  }
  STRCPY(ff_expand_buffer, search_ctx->ffsc_start_dir);
  add_pathsep(ff_expand_buffer);
  {
    size_t eb_len = STRLEN(ff_expand_buffer);
    char_u *buf = xmalloc(eb_len + STRLEN(search_ctx->ffsc_fix_path) + 1);

    STRCPY(buf, ff_expand_buffer);
    STRCPY(buf + eb_len, search_ctx->ffsc_fix_path);
    if (os_isdir(buf)) {
      STRCAT(ff_expand_buffer, search_ctx->ffsc_fix_path);
      add_pathsep(ff_expand_buffer);
    } else {
      char_u *p =  path_tail(search_ctx->ffsc_fix_path);
      char_u *wc_path = NULL;
      char_u *temp = NULL;
      int len = 0;

      if (p > search_ctx->ffsc_fix_path) {
        len = (int)(p - search_ctx->ffsc_fix_path) - 1;
        STRNCAT(ff_expand_buffer, search_ctx->ffsc_fix_path, len);
        add_pathsep(ff_expand_buffer);
      } else
        len = (int)STRLEN(search_ctx->ffsc_fix_path);

      if (search_ctx->ffsc_wc_path != NULL) {
        wc_path = vim_strsave(search_ctx->ffsc_wc_path);
        temp = xmalloc(STRLEN(search_ctx->ffsc_wc_path)
                       + STRLEN(search_ctx->ffsc_fix_path + len)
                       + 1);
      }

      if (temp == NULL || wc_path == NULL) {
        free(buf);
        free(temp);
        free(wc_path);
        goto error_return;
      }

      STRCPY(temp, search_ctx->ffsc_fix_path + len);
      STRCAT(temp, search_ctx->ffsc_wc_path);
      free(search_ctx->ffsc_wc_path);
      free(wc_path);
      search_ctx->ffsc_wc_path = temp;
    }
    free(buf);
  }

  sptr = ff_create_stack_element(ff_expand_buffer,
      search_ctx->ffsc_wc_path,
      level, 0);

  ff_push(search_ctx, sptr);
  search_ctx->ffsc_file_to_search = vim_strsave(filename);
  return search_ctx;

error_return:
  /*
   * We clear the search context now!
   * Even when the caller gave us a (perhaps valid) context we free it here,
   * as we might have already destroyed it.
   */
  vim_findfile_cleanup(search_ctx);
  return NULL;
}