annotate lisp/README @ 5914:bd4d2c8ef9cc

Use the existing C-level line number cache within #'line-number. src/ChangeLog addition: 2015-05-15 Aidan Kehoe <kehoea@parhasard.net> * buffer.c: * buffer.c (Fline_number): New C implementation, using the line number cache of line-number.c, with a new optional BUFFER argument. * buffer.c (syms_of_buffer): Make it available to Lisp. * line-number.c (buffer_line_number): New argument, RESPECT-NARROWING, describing whether to count from the beginning of the visible region or from the beginning of the buffer. * line-number.h: * line-number.h (buffer_line_number): Update its declaration. * redisplay.c (window_line_number): Call it with the new argument. lisp/ChangeLog addition: 2015-05-15 Aidan Kehoe <kehoea@parhasard.net> * simple.el: * simple.el (line-number): Moved to buffer.c; we have an existing line number cache in C, it's a shame not to have it available.
author Aidan Kehoe <kehoea@parhasard.net>
date Fri, 15 May 2015 18:11:47 +0100
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1 The files in this directory contain source code for the core XEmacs
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2 facilities written in Emacs Lisp. *.el files are Elisp source, and
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3 *.elc files are byte-compiled versions of the corresponding *.el
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4 files. Byte-compiled files are architecture-independent.
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5
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6 Functions used only by files in this directory are considered
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7 "internal" and are subject to change at any time. All commands, and
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8 most functions with docstrings, are part of the exported API. In
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9 particular, it is considered good style to use the Common Lisp
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10 facilities provided in cl*.el. (Yes, that's ambiguous. Sorry, we
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11 don't have a full specification of the API, as the Lispref is
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12 chronically incomplete. Anything described in the Lispref is part of
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13 the API, of course.)
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14
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15 Libraries which implement applications and enhancements are placed in
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16 the "packages", which are distributed separately from the core
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17 sources.
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18
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19 #### Someone please update this.
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20 #### Partially updated 2001-08-25 by sjt. Needs more work. Mike?
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21
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22 When XEmacs starts up, it adds certain directories in various
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23 hierarchies containing Lisp libraries to `load-path' (the list of
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24 directories to be searched when loading files). These are: this
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25 directory, its subdirectory ./mule (in Mule-enabled XEmacs only), the
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26 site-lisp directory (deprecated), and all the lisp/PACKAGE
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27 subdirectories of the xemacs-packages, mule-packages, and
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28 site-packages hierarchies. See setup-paths.el.
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29
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30 #### Is the following true or relevant any more?
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31 bogus> Directories whose names begin with "-" or "." are not added to
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32 bogus> the default load-path.
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33
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34 Some files which you might reasonably want to alter when installing or
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35 customizing XEmacs at your site are:
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36
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37 paths.el You may need to change the default pathnames here,
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38 but probably not. This is loaded before XEmacs is
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39 dumped.
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40
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41 site-init.el #### obsolete and removed?
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42 To pre-load additional libraries into XEmacs and dump
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43 them in the executable, load them from this file.
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44 Read the instructions in this file for a description
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45 of how to do this.
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46
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47 site-load.el #### description is obsolete
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48 This is like site-init.el, but if you want the
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49 docstrings of your preloaded libraries to be kept in
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50 the DOC file instead of in the executable, you should
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51 load them from this file instead. To do this, you must
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52 also cause them to be scanned when the DOC file is
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53 generated by editing ../src/Makefile.in.in and
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54 rerunning configure.
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55 #### new semantics
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56 This file will preload additional libraries listed in
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57 ../site-packages and dump them into XEmacs.
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58
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59 ../site-packages List of additional libraries read by site-load.el.
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60
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61 site-start.el This is loaded each time XEmacs starts up, before the
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62 user's .emacs file. (Sysadmin must create.) Can be
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63 inhibited for a given invocation with `--no-site-file'.
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64
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65 default.el This is loaded each time XEmacs starts up, after the
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66 user's .emacs file, unless .emacs sets the variable
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67 inhibit-default-init to t. (Sysadmin must create.)
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68 Can be inhibited for a given invocation with `-q'.
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69
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70 version.el This contains the version information for XEmacs.
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71
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72 ========================================================================
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73 Original text follows:
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74
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75 The files in this directory contain source code for the XEmacs
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76 facilities written in Emacs Lisp. *.el files are Elisp source, and
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77 *.elc files are byte-compiled versions of the corresponding *.el
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78 files. Byte-compiled files are architecture-independent.
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79
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80 #### Someone please update this.
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81
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82 bogus> When XEmacs starts up, it adds all subdirectories of the
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83 bogus> site-lisp directory. The site-lisp directory normally exists
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84 bogus> only in installation trees. For more information about the
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85 bogus> site-lisp directory see the NEWS file.
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86
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87 bogus> After XEmacs adds all subdirectories of the site-lisp
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88 bogus> directory, it adds all subdirectories of this directory to the
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89 bogus> load-path (the list of directories to be searched when loading
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90 bogus> files.) To speed up this process, this directory has been
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91 bogus> rearranged to have very few files at the top-level, so that
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92 bogus> emacs doesn't have to stat() several hundred files to find the
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93 bogus> dozen or so which are actually subdirectories.
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94
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95 bogus> Directories whose names begin with "-" or "." are not added to
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96 bogus> the default load-path.
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97
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98 The only files which remain at top-level are those which you might
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99 reasonably want to alter when installing or customizing XEmacs at your
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100 site. The files which may appear at top level are:
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101
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102 paths.el You may need to change the default pathnames here,
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103 but probably not. This is loaded before XEmacs is
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104 dumped.
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105
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106 site-init.el To pre-load additional libraries into XEmacs and dump
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107 them in the executable, load them from this file.
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108 Read the instructions in this file for a description
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109 of how to do this.
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110
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111 site-load.el This is like site-init.el, but if you want the
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112 docstrings of your preloaded libraries to be kept in
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113 the DOC file instead of in the executable, you should
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114 load them from this file instead. To do this, you must
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115 also cause them to be scanned when the DOC file is
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116 generated by editing ../src/Makefile.in.in and
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117 rerunning configure.
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118
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119 site-start.el This is loaded each time XEmacs starts up, before the
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120 user's .emacs file.
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121
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122 default.el This is loaded each time XEmacs starts up, after the
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123 user's .emacs file, unless .emacs sets the variable
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124 inhibit-default-init to t.
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125
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126 version.el This contains the version information for XEmacs.