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1 ;;; tl-str.el --- Emacs Lisp Library module about string
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2
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3 ;; Copyright (C) 1995,1996 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 ;; Version:
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7 ;; $Id: tl-str.el,v 1.1.1.1 1996/12/18 03:55:31 steve Exp $
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8 ;; Keywords: string
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9
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10 ;; This file is part of tl (Tiny Library).
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11
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12 ;; This program is free software; you can redistribute it and/or
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13 ;; modify it under the terms of the GNU General Public License as
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14 ;; published by the Free Software Foundation; either version 2, or (at
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15 ;; your option) any later version.
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16
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17 ;; This program is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Code:
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28
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29 (require 'emu)
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30 (require 'tl-list)
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31
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32
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33 ;;; @ converter
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34 ;;;
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35
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36 (defun expand-char-ranges (str)
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37 (let ((i 0)
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38 (len (length str))
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39 chr pchr nchr
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40 (dest ""))
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41 (while (< i len)
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42 (setq chr (elt str i))
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43 (cond ((and pchr (eq chr ?-))
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44 (setq pchr (1+ pchr))
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45 (setq i (1+ i))
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46 (setq nchr (elt str i))
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47 (while (<= pchr nchr)
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48 (setq dest (concat dest (char-to-string pchr)))
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49 (setq pchr (1+ pchr))
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50 )
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51 )
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52 (t
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53 (setq dest (concat dest (char-to-string chr)))
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54 ))
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55 (setq pchr chr)
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56 (setq i (1+ i))
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57 )
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58 dest))
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59
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60
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61 ;;; @ space
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62 ;;;
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63
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64 (defun eliminate-top-spaces (str)
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65 "Eliminate top sequence of space or tab and return it. [tl-str.el]"
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66 (if (string-match "^[ \t]+" str)
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67 (substring str (match-end 0))
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68 str))
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69
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70 (defun eliminate-last-spaces (str)
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71 "Eliminate last sequence of space or tab and return it. [tl-str.el]"
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72 (if (string-match "[ \t]+$" str)
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73 (substring str 0 (match-beginning 0))
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74 str))
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75
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76 (defun replace-space-with-underline (str)
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77 (mapconcat (function
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78 (lambda (arg)
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79 (char-to-string
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80 (if (eq arg ?\ )
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81 ?_
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82 arg)))) str "")
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83 )
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84
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85
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86 ;;; @ version
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87 ;;;
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88
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89 (defun version-to-list (str)
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90 (if (string-match "[0-9]+" str)
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91 (let ((dest
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92 (list
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93 (string-to-number
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94 (substring str (match-beginning 0)(match-end 0))
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95 ))))
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96 (setq str (substring str (match-end 0)))
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97 (while (string-match "^\\.[0-9]+" str)
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98 (setq dest
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99 (cons
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100 (string-to-number
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101 (substring str (1+ (match-beginning 0))(match-end 0)))
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102 dest))
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103 (setq str (substring str (match-end 0)))
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104 )
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105 (nreverse dest)
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106 )))
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107
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108 (defun version< (v1 v2)
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109 (or (listp v1)
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110 (setq v1 (version-to-list v1))
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111 )
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112 (or (listp v2)
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113 (setq v2 (version-to-list v2))
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114 )
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115 (catch 'tag
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116 (while (and v1 v2)
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117 (cond ((< (car v1)(car v2))
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118 (throw 'tag v2)
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119 )
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120 ((> (car v1)(car v2))
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121 (throw 'tag nil)
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122 ))
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123 (setq v1 (cdr v1)
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124 v2 (cdr v2))
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125 )
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126 v2))
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127
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128 (defun version<= (v1 v2)
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129 (or (listp v1)
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130 (setq v1 (version-to-list v1))
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131 )
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132 (or (listp v2)
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133 (setq v2 (version-to-list v2))
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134 )
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135 (catch 'tag
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136 (while (and v1 v2)
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137 (cond ((< (car v1)(car v2))
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138 (throw 'tag v2)
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139 )
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140 ((> (car v1)(car v2))
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141 (throw 'tag nil)
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142 ))
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143 (setq v1 (cdr v1)
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144 v2 (cdr v2))
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145 )
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146 (or v2 (and (null v1)(null v2)))
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147 ))
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148
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149 (defun version> (v1 v2)
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150 (or (listp v1)
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151 (setq v1 (version-to-list v1))
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152 )
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153 (or (listp v2)
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154 (setq v2 (version-to-list v2))
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155 )
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156 (catch 'tag
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157 (while (and v1 v2)
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158 (cond ((> (car v1)(car v2))
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159 (throw 'tag v1)
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160 )
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161 ((< (car v1)(car v2))
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162 (throw 'tag nil)
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163 ))
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164 (setq v1 (cdr v1)
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165 v2 (cdr v2))
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166 )
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167 v1))
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168
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169 (defun version>= (v1 v2)
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170 (or (listp v1)
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171 (setq v1 (version-to-list v1))
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172 )
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173 (or (listp v2)
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174 (setq v2 (version-to-list v2))
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175 )
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176 (catch 'tag
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177 (while (and v1 v2)
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178 (cond ((> (car v1)(car v2))
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179 (throw 'tag v1)
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180 )
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181 ((< (car v1)(car v2))
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182 (throw 'tag nil)
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183 ))
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184 (setq v1 (cdr v1)
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185 v2 (cdr v2))
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186 )
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187 (or v1 (and (null v1)(null v2)))
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188 ))
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189
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190
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191 ;;; @ RCS version
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192 ;;;
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193
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194 (defun get-version-string (id)
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195 "Return a version-string from RCS ID. [tl-str.el]"
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196 (and (string-match ",v \\([0-9][0-9.][0-9.]+\\)" id)
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197 (substring id (match-beginning 1)(match-end 1))
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198 ))
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199
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200
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201 ;;; @ file name
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202 ;;;
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203
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204 (defun file-name-non-extension (filename)
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205 (if (string-match "\\.[^.]+$" filename)
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206 (substring filename 0 (match-beginning 0))
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207 filename))
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208
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209 (defvar filename-special-char-range
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210 (nconc '((0 . 31))
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211 (string-to-int-list "!\"$")
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212 (list (cons (char-int ?&) (char-int ?*)))
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213 (string-to-int-list "/;<>?")
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214 (list (cons (char-int ?\[) (char-int ?^)))
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215 (string-to-int-list "`")
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216 (list (cons (char-int ?{) (char-int ?})))
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217 '((127 . 159)))
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218 "*Range of characters which is not available in file name. [tl-str.el]")
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219
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220 (defvar filename-space-char-range '(9 32 160)
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221 "*Range of characters which indicates space. These characters
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222 are replaced to `_' by function `replace-as-filename' [tl-str.el]")
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223
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224 (defun replace-as-filename (str)
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225 "Return safety filename from STR. [tl-str.el]"
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226 (let (sf)
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227 (mapconcat (function
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228 (lambda (chr)
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229 (cond ((member-of-range chr filename-space-char-range)
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230 (if sf
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231 ""
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232 (setq sf t)
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233 "_"))
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234 ((member-of-range chr filename-special-char-range)
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235 "")
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236 (t
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237 (setq sf nil)
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238 (char-to-string chr)
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239 ))
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240 ))
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241 (string-to-char-list str)
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242 "")))
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243
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244
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245 ;;; @ symbol
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246 ;;;
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247
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248 (defun symbol-concat (&rest args)
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249 "Return a symbol whose name is concatenation of arguments ARGS
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250 which are string or symbol. [tl-str.el]"
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251 (intern (apply (function concat)
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252 (mapcar (function
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253 (lambda (s)
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254 (cond ((symbolp s) (symbol-name s))
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255 ((stringp s) s)
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256 )
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257 ))
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258 args)))
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259 )
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260
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261
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262 ;;; @ matching
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263 ;;;
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264
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265 (defun top-string-match (pat str)
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266 "Return a list (MATCHED REST) if string PAT is top substring of
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267 string STR. [tl-str.el]"
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268 (if (string-match
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269 (concat "^" (regexp-quote pat))
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270 str)
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271 (list pat (substring str (match-end 0)))
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272 ))
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273
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274 (defun middle-string-match (pat str)
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275 "Return a list (PREVIOUS MATCHED REST) if string PAT is found in
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276 string STR. [tl-str.el]"
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277 (if (equal pat str)
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278 (list nil pat nil)
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279 (if (string-match (regexp-quote pat) str)
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280 (let ((b (match-beginning 0))
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281 (e (match-end 0)) )
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282 (list (if (not (= b 0))
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283 (substring str 0 b)
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284 )
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285 pat
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286 (if (> (length str) e)
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287 (substring str e)
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288 )
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289 )))))
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290
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291 (defun re-top-string-match (pat str)
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292 "Return a list (MATCHED REST) if regexp PAT is matched as top
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293 substring of string STR. [tl-str.el]"
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294 (if (string-match (concat "^" pat) str)
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295 (let ((e (match-end 0)))
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296 (list (substring str 0 e)(substring str e))
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297 )))
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298
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299
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300 ;;; @ compare
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301 ;;;
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302
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303 (defun string-compare-from-top (str1 str2)
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304 (let* ((len1 (length str1))
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305 (len2 (length str2))
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306 (len (min len1 len2))
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307 (p 0)
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308 c1 c2)
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309 (while (and (< p len)
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310 (progn
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311 (setq c1 (sref str1 p)
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312 c2 (sref str2 p))
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313 (eq c1 c2)
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314 ))
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315 (setq p (+ p (char-length c1)))
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316 )
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317 (and (> p 0)
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318 (let ((matched (substring str1 0 p))
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319 (r1 (and (< p len1)(substring str1 p)))
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320 (r2 (and (< p len2)(substring str2 p)))
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321 )
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322 (if (eq r1 r2)
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323 matched
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324 (list 'seq matched (list 'or r1 r2))
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325 )))))
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326
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327
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328 ;;; @ regexp
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329 ;;;
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330
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331 (defun regexp-* (regexp)
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332 (concat regexp "*"))
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333
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334 (defun regexp-or (&rest args)
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335 (concat "\\(" (mapconcat (function identity) args "\\|") "\\)"))
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336
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337
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338 ;;; @ end
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339 ;;;
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340
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341 (provide 'tl-str)
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342
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343 ;;; tl-str.el ends here
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