annotate lisp/find-paths.el @ 826:6728e641994e

[xemacs-hg @ 2002-05-05 11:30:15 by ben] syntax cache, 8-bit-format, lots of code cleanup README.packages: Update info about --package-path. i.c: Create an inheritable event and pass it on to XEmacs, so that ^C can be handled properly. Intercept ^C and signal the event. "Stop Build" in VC++ now works. bytecomp-runtime.el: Doc string changes. compat.el: Some attempts to redo this to make it truly useful and fix the "multiple versions interacting with each other" problem. Not yet done. Currently doesn't work. files.el: Use with-obsolete-variable to avoid warnings in new revert-buffer code. xemacs.mak: Split up CFLAGS into a version without flags specifying the C library. The problem seems to be that minitar depends on zlib, which depends specifically on libc.lib, not on any of the other C libraries. Unless you compile with libc.lib, you get errors -- specifically, no _errno in the other libraries, which must make it something other than an int. (#### But this doesn't seem to obtain in XEmacs, which also uses zlib, and can be linked with any of the C libraries. Maybe zlib is used differently and doesn't need errno, or maybe XEmacs provides an int errno; ... I don't understand. Makefile.in.in: Fix so that packages are around when testing. abbrev.c, alloc.c, buffer.c, buffer.h, bytecode.c, callint.c, casefiddle.c, casetab.c, casetab.h, charset.h, chartab.c, chartab.h, cmds.c, console-msw.h, console-stream.c, console-x.c, console.c, console.h, data.c, device-msw.c, device.c, device.h, dialog-msw.c, dialog-x.c, dired-msw.c, dired.c, doc.c, doprnt.c, dumper.c, editfns.c, elhash.c, emacs.c, eval.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, events.c, events.h, extents.c, extents.h, faces.c, file-coding.c, file-coding.h, fileio.c, fns.c, font-lock.c, frame-gtk.c, frame-msw.c, frame-x.c, frame.c, frame.h, glade.c, glyphs-gtk.c, glyphs-msw.c, glyphs-msw.h, glyphs-x.c, glyphs.c, glyphs.h, gui-msw.c, gui-x.c, gui.h, gutter.h, hash.h, indent.c, insdel.c, intl-win32.c, intl.c, keymap.c, lisp-disunion.h, lisp-union.h, lisp.h, lread.c, lrecord.h, lstream.c, lstream.h, marker.c, menubar-gtk.c, menubar-msw.c, menubar-x.c, menubar.c, minibuf.c, mule-ccl.c, mule-charset.c, mule-coding.c, mule-wnnfns.c, nas.c, objects-msw.c, objects-x.c, opaque.c, postgresql.c, print.c, process-nt.c, process-unix.c, process.c, process.h, profile.c, rangetab.c, redisplay-gtk.c, redisplay-msw.c, redisplay-output.c, redisplay-x.c, redisplay.c, redisplay.h, regex.c, regex.h, scrollbar-msw.c, search.c, select-x.c, specifier.c, specifier.h, symbols.c, symsinit.h, syntax.c, syntax.h, syswindows.h, tests.c, text.c, text.h, tooltalk.c, ui-byhand.c, ui-gtk.c, unicode.c, win32.c, window.c: Another big Ben patch. -- FUNCTIONALITY CHANGES: add partial support for 8-bit-fixed, 16-bit-fixed, and 32-bit-fixed formats. not quite done yet. (in particular, needs functions to actually convert the buffer.) NOTE: lots of changes to regex.c here. also, many new *_fmt() inline funs that take an Internal_Format argument. redo syntax cache code. make the cache per-buffer; keep the cache valid across calls to functions that use it. also keep it valid across insertions/deletions and extent changes, as much as is possible. eliminate the junky regex-reentrancy code by passing in the relevant lisp info to the regex routines as local vars. add general mechanism in extents code for signalling extent changes. fix numerous problems with the case-table implementation; yoshiki never properly transferred many algorithms from old-style to new-style case tables. redo char tables to support a default argument, so that mapping only occurs over changed args. change many chartab functions to accept Lisp_Object instead of Lisp_Char_Table *. comment out the code in font-lock.c by default, because font-lock.el no longer uses it. we should consider eliminating it entirely. Don't output bell as ^G in console-stream when not a TTY. add -mswindows-termination-handle to interface with i.c, so we can properly kill a build. add more error-checking to buffer/string macros. add some additional buffer_or_string_() funs. -- INTERFACE CHANGES AFFECTING MORE CODE: switch the arguments of write_c_string and friends to be consistent with write_fmt_string, which must have printcharfun first. change BI_* macros to BYTE_* for increased clarity; similarly for bi_* local vars. change VOID_TO_LISP to be a one-argument function. eliminate no-longer-needed CVOID_TO_LISP. -- char/string macro changes: rename MAKE_CHAR() to make_emchar() for slightly less confusion with make_char(). (The former generates an Emchar, the latter a Lisp object. Conceivably we should rename make_char() -> wrap_char() and similarly for make_int(), make_float().) Similar changes for other *CHAR* macros -- we now consistently use names with `emchar' whenever we are working with Emchars. Any remaining name with just `char' always refers to a Lisp object. rename macros with XSTRING_* to string_* except for those that reference actual fields in the Lisp_String object, following conventions used elsewhere. rename set_string_{data,length} macros (the only ones to work with a Lisp_String_* instead of a Lisp_Object) to set_lispstringp_* to make the difference clear. try to be consistent about caps vs. lowercase in macro/inline-fun names for chars and such, which wasn't the case before. we now reserve caps either for XFOO_ macros that reference object fields (e.g. XSTRING_DATA) or for things that have non-function semantics, e.g. directly modifying an arg (BREAKUP_EMCHAR) or evaluating an arg (any arg) more than once. otherwise, use lowercase. here is a summary of most of the macros/inline funs changed by all of the above changes: BYTE_*_P -> byte_*_p XSTRING_BYTE -> string_byte set_string_data/length -> set_lispstringp_data/length XSTRING_CHAR_LENGTH -> string_char_length XSTRING_CHAR -> string_emchar INTBYTE_FIRST_BYTE_P -> intbyte_first_byte_p INTBYTE_LEADING_BYTE_P -> intbyte_leading_byte_p charptr_copy_char -> charptr_copy_emchar LEADING_BYTE_* -> leading_byte_* CHAR_* -> EMCHAR_* *_CHAR_* -> *_EMCHAR_* *_CHAR -> *_EMCHAR CHARSET_BY_ -> charset_by_* BYTE_SHIFT_JIS* -> byte_shift_jis* BYTE_BIG5* -> byte_big5* REP_BYTES_BY_FIRST_BYTE -> rep_bytes_by_first_byte char_to_unicode -> emchar_to_unicode valid_char_p -> valid_emchar_p Change intbyte_strcmp -> qxestrcmp_c (duplicated functionality). -- INTERFACE CHANGES AFFECTING LESS CODE: use DECLARE_INLINE_HEADER in various places. remove '#ifdef emacs' from XEmacs-only files. eliminate CHAR_TABLE_VALUE(), which duplicated the functionality of get_char_table(). add BUFFER_TEXT_LOOP to simplify iterations over buffer text. define typedefs for signed and unsigned types of fixed sizes (INT_32_BIT, UINT_32_BIT, etc.). create ALIGN_FOR_TYPE as a higher-level interface onto ALIGN_SIZE; fix code to use it. add charptr_emchar_len to return the text length of the character pointed to by a ptr; use it in place of charcount_to_bytecount(..., 1). add emchar_len to return the text length of a given character. add types Bytexpos and Charxpos to generalize Bytebpos/Bytecount and Charbpos/Charcount, in code (particularly, the extents code and redisplay code) that works with either kind of index. rename redisplay struct params with names such as `charbpos' to e.g. `charpos' when they are e.g. a Charxpos, not a Charbpos. eliminate xxDEFUN in place of DEFUN; no longer necessary with changes awhile back to doc.c. split up big ugly combined list of EXFUNs in lisp.h on a file-by-file basis, since other prototypes are similarly split. rewrite some "*_UNSAFE" macros as inline funs and eliminate the _UNSAFE suffix. move most string code from lisp.h to text.h; the string code and text.h code is now intertwined in such a fashion that they need to be in the same place and partially interleaved. (you can't create forward references for inline funs) automated/lisp-tests.el, automated/symbol-tests.el, automated/test-harness.el: Fix test harness to output FAIL messages to stderr when in batch mode. Fix up some problems in lisp-tests/symbol-tests that were causing spurious failures.
author ben
date Sun, 05 May 2002 11:33:57 +0000
parents 79940b592197
children 987c2a685f39
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1 ;;; find-paths.el --- setup various XEmacs paths
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2
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3 ;; Copyright (C) 1985-1986, 1990, 1992-1997 Free Software Foundation, Inc.
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4 ;; Copyright (c) 1993, 1994 Sun Microsystems, Inc.
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5 ;; Copyright (C) 1995 Board of Trustees, University of Illinois
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6
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7 ;; Author: Mike Sperber <sperber@informatik.uni-tuebingen.de>
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8 ;; Maintainer: XEmacs Development Team
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9 ;; Keywords: internal, dumped
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10
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11 ;; This file is part of XEmacs.
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12
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13 ;; XEmacs is free software; you can redistribute it and/or modify it
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14 ;; under the terms of the GNU General Public License as published by
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15 ;; the Free Software Foundation; either version 2, or (at your option)
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16 ;; any later version.
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17
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18 ;; XEmacs is distributed in the hope that it will be useful, but
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19 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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21 ;; General Public License for more details.
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22
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23 ;; You should have received a copy of the GNU General Public License
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24 ;; along with XEmacs; see the file COPYING. If not, write to the
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25 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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26 ;; Boston, MA 02111-1307, USA.
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27
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28 ;;; Synched up with: Not in FSF.
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29
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30 ;;; Commentary:
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31
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32 ;; This file is dumped with XEmacs.
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33
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34 ;; This file contains basic library functionality for manipulating paths
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35 ;; and path lists and finding paths in the XEmacs hierarchy.
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36
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37
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38 ;;; Code:
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39
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40 (defvar paths-version-control-filename-regexp
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41 "^\\(RCS\\|CVS\\|SCCS\\)$"
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42 "File bases associated with version control.")
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43
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44 (defvar paths-lisp-filename-regexp
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45 "^\\(.*\\.elc?\\)$"
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46 "File bases that contain Lisp file.")
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47
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48 (defvar paths-no-lisp-directory-regexp
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49 (concat "\\(" paths-version-control-filename-regexp "\\)"
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50 "\\|"
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51 "\\(" paths-lisp-filename-regexp "\\)")
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52 "File bases that may not be directories containing Lisp code.")
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53
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54 (defun paths-find-recursive-path (directories &optional max-depth exclude-regexp)
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55 "Return a list of the directory hierarchy underneath DIRECTORIES.
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56 The returned list is sorted by pre-order and lexicographically.
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57 MAX-DEPTH limits the depth of the search to MAX-DEPTH level,
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58 if it is a number. If MAX-DEPTH is NIL, the search depth is unlimited.
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59 EXCLUDE-REGEXP is a regexp that matches directory names to exclude
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60 from the search."
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61 (let ((path '()))
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62 (while directories
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63 (let ((directory (file-name-as-directory
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64 (expand-file-name
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65 (car directories)))))
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66 (if (paths-file-readable-directory-p directory)
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67 (let ((raw-entries
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68 (if (equal 0 max-depth)
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69 '()
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70 (directory-files directory nil "^[^.-]")))
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71 (reverse-dirs '()))
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72 (while raw-entries
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73 (if (not (and exclude-regexp
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74 (string-match exclude-regexp (car raw-entries))))
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75 (setq reverse-dirs
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76 (cons (expand-file-name (car raw-entries) directory)
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77 reverse-dirs)))
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78 (setq raw-entries (cdr raw-entries)))
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79
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80 (let ((sub-path
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81 (paths-find-recursive-path (reverse reverse-dirs)
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82 (if (numberp max-depth)
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83 (- max-depth 1)
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84 max-depth)
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85 exclude-regexp)))
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86 (setq path (nconc path
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87 (list directory)
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88 sub-path))))))
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89 (setq directories (cdr directories)))
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90 path))
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91
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92 (defun paths-file-readable-directory-p (filename)
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93 "Check if filename is a readable directory."
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94 (and (file-directory-p filename)
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95 (file-readable-p filename)))
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96
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97 (defun paths-find-recursive-load-path (directories &optional max-depth)
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98 "Construct a recursive load path underneath DIRECTORIES."
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99 (paths-find-recursive-path directories
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100 max-depth paths-no-lisp-directory-regexp))
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101
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102 (defun paths-emacs-root-p (directory)
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103 "Check if DIRECTORY is a plausible installation root for XEmacs."
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104 (or
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105 ;; installed
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106 (paths-file-readable-directory-p (paths-construct-path (list directory
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107 "lib"
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108 (construct-emacs-version-name))))
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109 ;; in-place or windows-nt
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110 (and
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111 (paths-file-readable-directory-p (paths-construct-path (list directory "lisp")))
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112 (paths-file-readable-directory-p (paths-construct-path (list directory "etc"))))))
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113
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114 (defun paths-root-in-place-p (root)
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115 "Check if ROOT is an in-place installation root for XEmacs."
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116 (paths-file-readable-directory-p (paths-construct-path (list root "lisp"))))
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117
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118 (defun paths-chase-symlink (file-name)
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119 "Chase a symlink until the bitter end."
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120 (let ((maybe-symlink (file-symlink-p file-name)))
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121 (if maybe-symlink
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122 (let* ((directory (file-name-directory file-name))
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123 (destination (expand-file-name maybe-symlink directory)))
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124 (paths-chase-symlink destination))
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125 file-name)))
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126
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127 (defun paths-find-emacs-root
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128 (invocation-directory invocation-name)
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129 "Find the run-time root of XEmacs."
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130 (let* ((executable-file-name (paths-chase-symlink
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131 (concat invocation-directory
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132 invocation-name)))
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133 (executable-directory (file-name-directory executable-file-name))
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134 (maybe-root-1 (file-name-as-directory
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135 (paths-construct-path '("..") executable-directory)))
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136 (maybe-root-2 (file-name-as-directory
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137 (paths-construct-path '(".." "..") executable-directory))))
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138 (or (and (paths-emacs-root-p maybe-root-1)
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139 maybe-root-1)
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140 (and (paths-emacs-root-p maybe-root-2)
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141 maybe-root-2))))
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142
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143 (defun paths-construct-path (components &optional expand-directory)
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144 "Convert list of path components COMPONENTS into a path.
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145 If EXPAND-DIRECTORY is non-NIL, use it as a directory to feed
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146 to EXPAND-FILE-NAME."
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147 (let* ((reverse-components (reverse components))
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148 (last-component (car reverse-components))
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149 (first-components (reverse (cdr reverse-components)))
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150 (path
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151 (apply #'concat
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152 (append (mapcar #'file-name-as-directory first-components)
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153 (list last-component)))))
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154 (if expand-directory
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155 (expand-file-name path expand-directory)
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156 path)))
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157
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158 (defun paths-construct-emacs-directory (root suffix base)
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159 "Construct a directory name within the XEmacs hierarchy."
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160 (file-name-as-directory
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161 (expand-file-name
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162 (concat
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163 (file-name-as-directory root)
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164 suffix
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165 base))))
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166
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167 (defun paths-find-emacs-directory (roots suffix base
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168 &optional envvar default keep-suffix
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169 in-place-external)
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170 "Find a directory in the XEmacs hierarchy.
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171 ROOTS must be a list of installation roots.
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172 SUFFIX is the subdirectory from there.
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173 BASE is the base to look for.
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174 ENVVAR is the name of the environment variable that might also
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175 specify the directory.
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176 DEFAULT is the preferred value.
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177 If KEEP-SUFFIX is non-nil, the suffix must be respected in searching
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178 the directory.
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179 If IN-PLACE-EXTERNAL is non-nil, the directory might be found outside
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180 an in-place root-hierarchy."
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181 (let ((preferred-value (or (and envvar (getenv envvar))
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182 default)))
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183 (if (and preferred-value
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184 (paths-file-readable-directory-p preferred-value))
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185 (file-name-as-directory preferred-value)
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186 (catch 'gotcha
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187 (while roots
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188 (let ((root (car roots)))
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189 ;; installed
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190 (let ((path (paths-construct-emacs-directory root suffix base)))
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191 (if (paths-file-readable-directory-p path)
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192 (throw 'gotcha path)))
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193 ;; in-place
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194 (if (null keep-suffix)
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195 (let ((path (paths-construct-emacs-directory root "" base)))
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196 (if (paths-file-readable-directory-p path)
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197 (throw 'gotcha path))))
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198 (if (and in-place-external
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199 (paths-root-in-place-p root))
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200 (let ((path (paths-construct-emacs-directory
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201 (paths-construct-path '("..") root)
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202 "" base)))
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203 (if (paths-file-readable-directory-p path)
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204 (throw 'gotcha path)))))
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205 (setq roots (cdr roots)))
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206 nil))))
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207
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208 (defun paths-find-site-directory (roots base &optional envvar default in-place-external)
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209 "Find a site-specific directory in the XEmacs hierarchy.
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210 If IN-PLACE-EXTERNAL is non-nil, the directory might be found outside
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211 an in-place root-hierarchy."
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212 (paths-find-emacs-directory roots
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213 (file-name-as-directory
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214 (paths-construct-path (list
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215 "lib"
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216 emacs-program-name)))
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217 base
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218 envvar default
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219 nil
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220 in-place-external))
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221
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222 (defun paths-find-version-directory (roots base
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223 &optional envvar default enforce-version)
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224 "Find a version-specific directory in the XEmacs hierarchy.
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225 If ENFORCE-VERSION is non-nil, the directory must contain the XEmacs version."
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226 (paths-find-emacs-directory roots
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227 (file-name-as-directory
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228 (paths-construct-path
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229 (list "lib"
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230 (construct-emacs-version-name))))
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231 base
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232 envvar default
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233 enforce-version))
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234
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235 (defun paths-find-architecture-directory (roots base &optional envvar default)
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236 "Find an architecture-specific directory in the XEmacs hierarchy."
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237 (or
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238 ;; from more to less specific
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239 (paths-find-version-directory roots
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240 (concat base system-configuration)
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241 envvar default)
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242 (paths-find-version-directory roots
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243 base
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244 envvar)
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245 (paths-find-version-directory roots
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246 system-configuration
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247 envvar)))
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248
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249 (defun construct-emacs-version-name ()
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250 "Construct the raw XEmacs version number."
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251 (concat emacs-program-name "-" emacs-program-version))
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252
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253 (defun paths-directories-which-exist (directories)
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254 "Return the directories among DIRECTORIES."
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255 (let ((reverse-directories '()))
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256 (while directories
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257 (if (paths-file-readable-directory-p (car directories))
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258 (setq reverse-directories
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259 (cons (car directories)
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260 reverse-directories)))
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261 (setq directories (cdr directories)))
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262 (reverse reverse-directories)))
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263
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264 (defun paths-uniq-append (list-1 list-2)
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265 "Append LIST-1 and LIST-2, omitting duplicates."
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266 (let ((reverse-survivors '()))
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267 (while list-2
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268 (if (null (member (car list-2) list-1))
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269 (setq reverse-survivors (cons (car list-2) reverse-survivors)))
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270 (setq list-2 (cdr list-2)))
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271 (append list-1
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272 (reverse reverse-survivors))))
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273
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274 (defun paths-filter (predicate list)
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275 "Delete all matches of PREDICATE from LIST."
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276 (let ((reverse-result '()))
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277 (while list
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278 (if (funcall predicate (car list))
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279 (setq reverse-result (cons (car list) reverse-result)))
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280 (setq list (cdr list)))
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281 (nreverse reverse-result)))
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282
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283 (defun paths-decode-directory-path (string &optional drop-empties)
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284 "Split STRING at path separators into a directory list.
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285 Non-\"\" components are converted into directory form.
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286 If DROP-EMPTIES is non-NIL, \"\" components are dropped from the output.
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287 Otherwise, they are left alone."
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288 (let* ((components (split-path string))
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289 (directories
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290 (mapcar #'(lambda (component)
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291 (if (string-equal "" component)
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292 component
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293 (file-name-as-directory component)))
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294 components)))
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295 (if drop-empties
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296 (paths-filter #'(lambda (component)
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297 (null (string-equal "" component)))
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298 directories)
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299 directories)))
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300
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301 (defun paths-find-emacs-roots (invocation-directory
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302 invocation-name)
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303 "Find all plausible installation roots for XEmacs."
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304 (let* ((potential-invocation-root
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305 (paths-find-emacs-root invocation-directory invocation-name))
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306 (invocation-roots
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307 (and potential-invocation-root
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308 (list potential-invocation-root)))
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309 (potential-installation-roots
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310 (paths-uniq-append
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311 (and configure-exec-prefix-directory
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312 (list (file-name-as-directory
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313 configure-exec-prefix-directory)))
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314 (and configure-prefix-directory
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315 (list (file-name-as-directory
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316 configure-prefix-directory)))))
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317 (installation-roots
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318 (paths-filter #'paths-emacs-root-p potential-installation-roots)))
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319 (paths-uniq-append invocation-roots
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320 installation-roots)))
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321
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322 ;;; find-paths.el ends here