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1 ;;; std11.el --- STD 11 functions for GNU Emacs
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2
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3 ;; Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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4
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5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
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6 ;; Keywords: mail, news, RFC 822, STD 11
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7 ;; Version: $Id: std11.el,v 1.1 1997/06/03 04:18:36 steve Exp $
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8
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9 ;; This file is part of MU (Message Utilities).
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10
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11 ;; This program is free software; you can redistribute it and/or
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12 ;; modify it under the terms of the GNU General Public License as
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13 ;; published by the Free Software Foundation; either version 2, or (at
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14 ;; your option) any later version.
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15
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16 ;; This program is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;;; Code:
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27
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28 (autoload 'buffer-substring-no-properties "emu")
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29 (autoload 'member "emu")
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30
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31
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32 ;;; @ field
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33 ;;;
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34
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35 (defconst std11-field-name-regexp "[!-9;-~]+")
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36 (defconst std11-field-head-regexp
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37 (concat "^" std11-field-name-regexp ":"))
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38 (defconst std11-next-field-head-regexp
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39 (concat "\n" std11-field-name-regexp ":"))
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40
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41 (defun std11-field-end ()
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42 "Move to end of field and return this point. [std11.el]"
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43 (if (re-search-forward std11-next-field-head-regexp nil t)
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44 (goto-char (match-beginning 0))
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45 (if (re-search-forward "^$" nil t)
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46 (goto-char (1- (match-beginning 0)))
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47 (end-of-line)
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48 ))
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49 (point)
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50 )
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51
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52 (defun std11-field-body (name &optional boundary)
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53 "Return body of field NAME.
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54 If BOUNDARY is not nil, it is used as message header separator.
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55 \[std11.el]"
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56 (save-excursion
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57 (save-restriction
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58 (std11-narrow-to-header boundary)
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59 (goto-char (point-min))
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60 (let ((case-fold-search t))
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61 (if (re-search-forward (concat "^" name ":[ \t]*") nil t)
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62 (buffer-substring-no-properties (match-end 0) (std11-field-end))
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63 )))))
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64
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65 (defun std11-find-field-body (field-names &optional boundary)
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66 "Return the first found field-body specified by FIELD-NAMES
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67 of the message header in current buffer. If BOUNDARY is not nil, it is
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68 used as message header separator. [std11.el]"
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69 (save-excursion
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70 (save-restriction
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71 (std11-narrow-to-header boundary)
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72 (let ((case-fold-search t)
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73 field-name)
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74 (catch 'tag
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75 (while (setq field-name (car field-names))
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76 (goto-char (point-min))
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77 (if (re-search-forward (concat "^" field-name ":[ \t]*") nil t)
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78 (throw 'tag
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79 (buffer-substring-no-properties
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80 (match-end 0) (std11-field-end)))
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81 )
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82 (setq field-names (cdr field-names))
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83 ))))))
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84
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85 (defun std11-field-bodies (field-names &optional default-value boundary)
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86 "Return list of each field-bodies of FIELD-NAMES of the message header
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87 in current buffer. If BOUNDARY is not nil, it is used as message
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88 header separator. [std11.el]"
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89 (save-excursion
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90 (save-restriction
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91 (std11-narrow-to-header boundary)
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92 (let* ((case-fold-search t)
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93 (dest (make-list (length field-names) default-value))
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94 (s-rest field-names)
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95 (d-rest dest)
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96 field-name)
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97 (while (setq field-name (car s-rest))
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98 (goto-char (point-min))
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99 (if (re-search-forward (concat "^" field-name ":[ \t]*") nil t)
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100 (setcar d-rest
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101 (buffer-substring-no-properties
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102 (match-end 0) (std11-field-end)))
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103 )
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104 (setq s-rest (cdr s-rest)
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105 d-rest (cdr d-rest))
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106 )
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107 dest))))
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108
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109
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110 ;;; @ unfolding
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111 ;;;
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112
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113 (defun std11-unfold-string (string)
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114 "Unfold STRING as message header field. [std11.el]"
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115 (let ((dest ""))
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116 (while (string-match "\n\\([ \t]\\)" string)
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117 (setq dest (concat dest
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118 (substring string 0 (match-beginning 0))
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119 (match-string 1 string)
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120 ))
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121 (setq string (substring string (match-end 0)))
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122 )
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123 (concat dest string)
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124 ))
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125
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126
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127 ;;; @ header
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128 ;;;
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129
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130 (defun std11-narrow-to-header (&optional boundary)
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131 "Narrow to the message header.
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132 If BOUNDARY is not nil, it is used as message header separator.
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133 \[std11.el]"
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134 (narrow-to-region
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135 (goto-char (point-min))
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136 (if (re-search-forward
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137 (concat "^\\(" (regexp-quote (or boundary "")) "\\)?$")
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138 nil t)
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139 (match-beginning 0)
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140 (point-max)
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141 )))
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142
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143 (defun std11-header-string (regexp &optional boundary)
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144 "Return string of message header fields matched by REGEXP.
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145 If BOUNDARY is not nil, it is used as message header separator.
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146 \[std11.el]"
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147 (let ((case-fold-search t))
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148 (save-excursion
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149 (save-restriction
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150 (std11-narrow-to-header boundary)
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151 (goto-char (point-min))
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152 (let (field header)
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153 (while (re-search-forward std11-field-head-regexp nil t)
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154 (setq field
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155 (buffer-substring (match-beginning 0) (std11-field-end)))
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156 (if (string-match regexp field)
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157 (setq header (concat header field "\n"))
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158 ))
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159 header)
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160 ))))
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161
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162 (defun std11-header-string-except (regexp &optional boundary)
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163 "Return string of message header fields not matched by REGEXP.
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164 If BOUNDARY is not nil, it is used as message header separator.
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165 \[std11.el]"
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166 (let ((case-fold-search t))
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167 (save-excursion
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168 (save-restriction
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169 (std11-narrow-to-header boundary)
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170 (goto-char (point-min))
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171 (let (field header)
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172 (while (re-search-forward std11-field-head-regexp nil t)
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173 (setq field
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174 (buffer-substring (match-beginning 0) (std11-field-end)))
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175 (if (not (string-match regexp field))
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176 (setq header (concat header field "\n"))
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177 ))
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178 header)
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179 ))))
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180
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181 (defun std11-collect-field-names (&optional boundary)
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182 "Return list of all field-names of the message header in current buffer.
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183 If BOUNDARY is not nil, it is used as message header separator.
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184 \[std11.el]"
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185 (save-excursion
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186 (save-restriction
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187 (std11-narrow-to-header boundary)
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188 (goto-char (point-min))
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189 (let (dest name)
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190 (while (re-search-forward std11-field-head-regexp nil t)
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191 (setq name (buffer-substring-no-properties
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192 (match-beginning 0)(1- (match-end 0))))
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193 (or (member name dest)
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194 (setq dest (cons name dest))
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195 )
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196 )
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197 dest))))
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198
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199
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200 ;;; @ quoted-string
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201 ;;;
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202
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203 (defun std11-wrap-as-quoted-pairs (string specials)
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204 (let (dest
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205 (i 0)
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206 (b 0)
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207 (len (length string))
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208 )
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209 (while (< i len)
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210 (let ((chr (aref string i)))
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211 (if (memq chr specials)
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212 (setq dest (concat dest (substring string b i) "\\")
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213 b i)
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214 ))
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215 (setq i (1+ i))
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216 )
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217 (concat dest (substring string b))
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218 ))
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219
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220 (defconst std11-non-qtext-char-list '(?\" ?\\ ?\r ?\n))
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221
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222 (defun std11-wrap-as-quoted-string (string)
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223 "Wrap STRING as RFC 822 quoted-string. [std11.el]"
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224 (concat "\""
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225 (std11-wrap-as-quoted-pairs string std11-non-qtext-char-list)
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226 "\""))
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227
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228 (defun std11-strip-quoted-pair (string)
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229 "Strip quoted-pairs in STRING. [std11.el]"
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230 (let (dest
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231 (b 0)
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232 (i 0)
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233 (len (length string))
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234 )
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235 (while (< i len)
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236 (let ((chr (aref string i)))
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237 (if (eq chr ?\\)
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238 (setq dest (concat dest (substring string b i))
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239 b (1+ i)
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240 i (+ i 2))
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241 (setq i (1+ i))
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242 )))
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243 (concat dest (substring string b))
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244 ))
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245
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246 (defun std11-strip-quoted-string (string)
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247 "Strip quoted-string STRING. [std11.el]"
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248 (let ((len (length string)))
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249 (or (and (>= len 2)
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250 (let ((max (1- len)))
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251 (and (eq (aref string 0) ?\")
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252 (eq (aref string max) ?\")
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253 (std11-strip-quoted-pair (substring string 1 max))
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254 )))
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255 string)))
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256
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257
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258 ;;; @ composer
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259 ;;;
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260
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261 (defun std11-addr-to-string (seq)
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262 "Return string from lexical analyzed list SEQ
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263 represents addr-spec of RFC 822. [std11.el]"
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264 (mapconcat (function
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265 (lambda (token)
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266 (let ((name (car token)))
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267 (cond
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268 ((eq name 'spaces) "")
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269 ((eq name 'comment) "")
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270 ((eq name 'quoted-string)
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271 (concat "\"" (cdr token) "\""))
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272 (t (cdr token)))
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273 )))
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274 seq "")
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275 )
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276
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277 (defun std11-address-string (address)
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278 "Return string of address part from parsed ADDRESS of RFC 822.
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279 \[std11.el]"
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280 (cond ((eq (car address) 'group)
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281 (mapconcat (function std11-address-string)
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282 (car (cdr address))
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283 ", ")
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284 )
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285 ((eq (car address) 'mailbox)
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286 (let ((addr (nth 1 address)))
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287 (std11-addr-to-string
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288 (if (eq (car addr) 'phrase-route-addr)
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289 (nth 2 addr)
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290 (cdr addr)
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291 )
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292 )))))
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293
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294 (defun std11-full-name-string (address)
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295 "Return string of full-name part from parsed ADDRESS of RFC 822.
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296 \[std11.el]"
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297 (cond ((eq (car address) 'group)
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298 (mapconcat (function
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299 (lambda (token)
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300 (cdr token)
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301 ))
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302 (nth 1 address) "")
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303 )
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304 ((eq (car address) 'mailbox)
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305 (let ((addr (nth 1 address))
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306 (comment (nth 2 address))
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307 phrase)
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308 (if (eq (car addr) 'phrase-route-addr)
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309 (setq phrase
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310 (mapconcat
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311 (function
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312 (lambda (token)
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313 (let ((type (car token)))
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314 (cond ((eq type 'quoted-string)
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315 (std11-strip-quoted-pair (cdr token))
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316 )
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317 ((eq type 'comment)
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318 (concat
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319 "("
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320 (std11-strip-quoted-pair (cdr token))
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321 ")")
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322 )
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323 (t
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324 (cdr token)
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325 )))))
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326 (nth 1 addr) ""))
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327 )
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328 (cond ((> (length phrase) 0) phrase)
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329 (comment (std11-strip-quoted-pair comment))
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330 )
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331 ))))
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332
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333
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334 ;;; @ parser
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335 ;;;
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336
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337 (defun std11-parse-address-string (string)
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338 "Parse STRING as mail address. [std11.el]"
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339 (std11-parse-address (std11-lexical-analyze string))
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340 )
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341
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342 (defun std11-parse-addresses-string (string)
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343 "Parse STRING as mail address list. [std11.el]"
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344 (std11-parse-addresses (std11-lexical-analyze string))
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345 )
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346
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347 (defun std11-extract-address-components (string)
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348 "Extract full name and canonical address from STRING.
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349 Returns a list of the form (FULL-NAME CANONICAL-ADDRESS).
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350 If no name can be extracted, FULL-NAME will be nil. [std11.el]"
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351 (let* ((structure (car (std11-parse-address-string
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352 (std11-unfold-string string))))
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353 (phrase (std11-full-name-string structure))
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354 (address (std11-address-string structure))
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355 )
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356 (list phrase address)
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357 ))
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358
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359 (provide 'std11)
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360
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361 (mapcar (function
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362 (lambda (func)
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363 (autoload func "std11-parse")
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364 ))
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365 '(std11-lexical-analyze
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366 std11-parse-address std11-parse-addresses
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367 std11-parse-address-string))
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368
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369
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370 ;;; @ end
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371 ;;;
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372
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373 ;;; std11.el ends here
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