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428
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1 /* XEmacs case conversion functions.
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2 Copyright (C) 1985, 1992, 1993, 1994, 1997, 1998 Free Software Foundation, Inc.
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826
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3 Copyright (C) 2002 Ben Wing.
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.34, but substantially rewritten by Martin. */
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23
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24 #include <config.h>
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25 #include "lisp.h"
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26
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27 #include "buffer.h"
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28 #include "insdel.h"
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29 #include "syntax.h"
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30
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31 enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
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32
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33 static Lisp_Object
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444
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34 casify_object (enum case_action flag, Lisp_Object string_or_char,
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35 Lisp_Object buffer)
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428
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36 {
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37 struct buffer *buf = decode_buffer (buffer, 0);
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38
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39 retry:
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40
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444
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41 if (CHAR_OR_CHAR_INTP (string_or_char))
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428
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42 {
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43 Emchar c;
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444
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44 CHECK_CHAR_COERCE_INT (string_or_char);
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45 c = XCHAR (string_or_char);
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428
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46 c = (flag == CASE_DOWN) ? DOWNCASE (buf, c) : UPCASE (buf, c);
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47 return make_char (c);
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48 }
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49
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444
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50 if (STRINGP (string_or_char))
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428
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51 {
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826
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52 Lisp_Object syntax_table = buf->mirror_syntax_table;
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665
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53 Intbyte *storage =
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826
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54 alloca_array (Intbyte, XSTRING_LENGTH (string_or_char) *
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55 MAX_EMCHAR_LEN);
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665
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56 Intbyte *newp = storage;
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57 Intbyte *oldp = XSTRING_DATA (string_or_char);
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771
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58 Intbyte *endp = oldp + XSTRING_LENGTH (string_or_char);
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428
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59 int wordp = 0, wordp_prev;
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60
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771
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61 while (oldp < endp)
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428
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62 {
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63 Emchar c = charptr_emchar (oldp);
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64 switch (flag)
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65 {
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66 case CASE_UP:
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67 c = UPCASE (buf, c);
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68 break;
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69 case CASE_DOWN:
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70 c = DOWNCASE (buf, c);
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71 break;
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72 case CASE_CAPITALIZE:
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73 case CASE_CAPITALIZE_UP:
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74 wordp_prev = wordp;
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75 wordp = WORD_SYNTAX_P (syntax_table, c);
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76 if (!wordp) break;
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77 if (wordp_prev)
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78 {
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79 if (flag == CASE_CAPITALIZE)
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80 c = DOWNCASE (buf, c);
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81 }
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82 else
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83 c = UPCASE (buf, c);
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84 break;
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85 }
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86
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87 newp += set_charptr_emchar (newp, c);
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88 INC_CHARPTR (oldp);
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89 }
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90
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91 return make_string (storage, newp - storage);
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92 }
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93
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444
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94 string_or_char = wrong_type_argument (Qchar_or_string_p, string_or_char);
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428
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95 goto retry;
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96 }
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97
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98 DEFUN ("upcase", Fupcase, 1, 2, 0, /*
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444
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99 Convert STRING-OR-CHAR to upper case and return that.
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100 STRING-OR-CHAR may be a character or string. The result has the same type.
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101 STRING-OR-CHAR is not altered--the value is a copy.
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428
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102 See also `capitalize', `downcase' and `upcase-initials'.
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103 Optional second arg BUFFER specifies which buffer's case tables to use,
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104 and defaults to the current buffer.
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105 */
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444
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106 (string_or_char, buffer))
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428
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107 {
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444
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108 return casify_object (CASE_UP, string_or_char, buffer);
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428
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109 }
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110
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111 DEFUN ("downcase", Fdowncase, 1, 2, 0, /*
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444
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112 Convert STRING-OR-CHAR to lower case and return that.
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113 STRING-OR-CHAR may be a character or string. The result has the same type.
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114 STRING-OR-CHAR is not altered--the value is a copy.
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428
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115 Optional second arg BUFFER specifies which buffer's case tables to use,
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116 and defaults to the current buffer.
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117 */
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444
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118 (string_or_char, buffer))
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428
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119 {
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444
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120 return casify_object (CASE_DOWN, string_or_char, buffer);
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428
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121 }
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122
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123 DEFUN ("capitalize", Fcapitalize, 1, 2, 0, /*
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444
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124 Convert STRING-OR-CHAR to capitalized form and return that.
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428
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125 This means that each word's first character is upper case
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126 and the rest is lower case.
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444
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127 STRING-OR-CHAR may be a character or string. The result has the same type.
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128 STRING-OR-CHAR is not altered--the value is a copy.
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428
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129 Optional second arg BUFFER specifies which buffer's case tables to use,
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130 and defaults to the current buffer.
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131 */
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444
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132 (string_or_char, buffer))
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428
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133 {
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444
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134 return casify_object (CASE_CAPITALIZE, string_or_char, buffer);
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428
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135 }
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136
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137 /* Like Fcapitalize but change only the initial characters. */
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138
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139 DEFUN ("upcase-initials", Fupcase_initials, 1, 2, 0, /*
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444
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140 Convert the initial of each word in STRING-OR-CHAR to upper case.
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428
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141 Do not change the other letters of each word.
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444
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142 STRING-OR-CHAR may be a character or string. The result has the same type.
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143 STRING-OR-CHAR is not altered--the value is a copy.
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428
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144 Optional second arg BUFFER specifies which buffer's case tables to use,
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145 and defaults to the current buffer.
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146 */
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444
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147 (string_or_char, buffer))
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428
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148 {
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444
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149 return casify_object (CASE_CAPITALIZE_UP, string_or_char, buffer);
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428
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150 }
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151
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152 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
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444
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153 START and END specify range of buffer to operate on. */
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428
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154
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155 static void
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444
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156 casify_region_internal (enum case_action flag, Lisp_Object start,
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157 Lisp_Object end, struct buffer *buf)
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428
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158 {
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159 /* This function can GC */
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665
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160 Charbpos pos, s, e;
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826
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161 Lisp_Object syntax_table = buf->mirror_syntax_table;
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428
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162 int mccount;
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163 int wordp = 0, wordp_prev;
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164
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444
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165 if (EQ (start, end))
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428
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166 /* Not modifying because nothing marked */
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167 return;
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168
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444
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169 get_buffer_range_char (buf, start, end, &s, &e, 0);
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170
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171 mccount = begin_multiple_change (buf, s, e);
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172 record_change (buf, s, e - s);
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428
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173
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444
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174 for (pos = s; pos < e; pos++)
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428
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175 {
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444
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176 Emchar oldc = BUF_FETCH_CHAR (buf, pos);
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177 Emchar c = oldc;
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428
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178
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179 switch (flag)
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180 {
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181 case CASE_UP:
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182 c = UPCASE (buf, oldc);
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183 break;
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184 case CASE_DOWN:
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185 c = DOWNCASE (buf, oldc);
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186 break;
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187 case CASE_CAPITALIZE:
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188 case CASE_CAPITALIZE_UP:
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189 /* !!#### need to revalidate the start and end pointers in case
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190 the buffer was changed */
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191 wordp_prev = wordp;
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192 wordp = WORD_SYNTAX_P (syntax_table, c);
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193 if (!wordp) continue;
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194 if (wordp_prev)
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195 {
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196 if (flag == CASE_CAPITALIZE)
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197 c = DOWNCASE (buf, c);
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198 }
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199 else
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200 c = UPCASE (buf, c);
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201 break;
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202 }
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203
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204 if (oldc == c) continue;
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444
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205 buffer_replace_char (buf, pos, c, 1, (pos == s));
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428
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206 BUF_MODIFF (buf)++;
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207 }
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208
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209 end_multiple_change (buf, mccount);
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210 }
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211
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212 static Lisp_Object
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444
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213 casify_region (enum case_action flag, Lisp_Object start, Lisp_Object end,
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428
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214 Lisp_Object buffer)
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215 {
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444
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216 casify_region_internal (flag, start, end, decode_buffer (buffer, 1));
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428
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217 return Qnil;
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218 }
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219
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220 DEFUN ("upcase-region", Fupcase_region, 2, 3, "r", /*
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221 Convert the region to upper case. In programs, wants two arguments.
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222 These arguments specify the starting and ending character numbers of
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223 the region to operate on. When used as a command, the text between
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224 point and the mark is operated on.
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225 See also `capitalize-region'.
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226 Optional third arg BUFFER defaults to the current buffer.
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227 */
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444
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228 (start, end, buffer))
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428
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229 {
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230 /* This function can GC */
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444
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231 return casify_region (CASE_UP, start, end, buffer);
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428
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232 }
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233
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234 DEFUN ("downcase-region", Fdowncase_region, 2, 3, "r", /*
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235 Convert the region to lower case. In programs, wants two arguments.
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236 These arguments specify the starting and ending character numbers of
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237 the region to operate on. When used as a command, the text between
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238 point and the mark is operated on.
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239 Optional third arg BUFFER defaults to the current buffer.
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240 */
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444
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241 (start, end, buffer))
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428
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242 {
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243 /* This function can GC */
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444
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244 return casify_region (CASE_DOWN, start, end, buffer);
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428
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245 }
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246
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247 DEFUN ("capitalize-region", Fcapitalize_region, 2, 3, "r", /*
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248 Convert the region to capitalized form.
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249 Capitalized form means each word's first character is upper case
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250 and the rest of it is lower case.
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251 In programs, give two arguments, the starting and ending
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252 character positions to operate on.
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253 Optional third arg BUFFER defaults to the current buffer.
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254 */
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444
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255 (start, end, buffer))
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428
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256 {
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257 /* This function can GC */
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444
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258 return casify_region (CASE_CAPITALIZE, start, end, buffer);
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428
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259 }
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260
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261 /* Like Fcapitalize_region but change only the initials. */
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262
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263 DEFUN ("upcase-initials-region", Fupcase_initials_region, 2, 3, "r", /*
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264 Upcase the initial of each word in the region.
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265 Subsequent letters of each word are not changed.
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266 In programs, give two arguments, the starting and ending
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267 character positions to operate on.
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268 Optional third arg BUFFER defaults to the current buffer.
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269 */
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444
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270 (start, end, buffer))
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428
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271 {
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444
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272 return casify_region (CASE_CAPITALIZE_UP, start, end, buffer);
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428
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273 }
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274
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275
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276 static Lisp_Object
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277 casify_word (enum case_action flag, Lisp_Object arg, Lisp_Object buffer)
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278 {
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665
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279 Charbpos farend;
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428
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280 struct buffer *buf = decode_buffer (buffer, 1);
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281
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282 CHECK_INT (arg);
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283
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284 farend = scan_words (buf, BUF_PT (buf), XINT (arg));
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285 if (!farend)
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286 farend = XINT (arg) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
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287
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288 casify_region_internal (flag, make_int (BUF_PT (buf)), make_int (farend), buf);
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289 BUF_SET_PT (buf, max (BUF_PT (buf), farend));
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290 return Qnil;
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291 }
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292
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293 DEFUN ("upcase-word", Fupcase_word, 1, 2, "p", /*
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444
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294 Convert following word (or COUNT words) to upper case, moving over.
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428
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295 With negative argument, convert previous words but do not move.
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296 See also `capitalize-word'.
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297 Optional second arg BUFFER defaults to the current buffer.
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298 */
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444
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299 (count, buffer))
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428
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300 {
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301 /* This function can GC */
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444
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302 return casify_word (CASE_UP, count, buffer);
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428
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303 }
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304
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305 DEFUN ("downcase-word", Fdowncase_word, 1, 2, "p", /*
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444
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306 Convert following word (or COUNT words) to lower case, moving over.
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428
|
307 With negative argument, convert previous words but do not move.
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|
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308 Optional second arg BUFFER defaults to the current buffer.
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309 */
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444
|
310 (count, buffer))
|
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428
|
311 {
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312 /* This function can GC */
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444
|
313 return casify_word (CASE_DOWN, count, buffer);
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428
|
314 }
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315
|
|
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316 DEFUN ("capitalize-word", Fcapitalize_word, 1, 2, "p", /*
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444
|
317 Capitalize the following word (or COUNT words), moving over.
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|
428
|
318 This gives the word(s) a first character in upper case
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|
|
319 and the rest lower case.
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320 With negative argument, capitalize previous words but do not move.
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321 Optional second arg BUFFER defaults to the current buffer.
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322 */
|
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444
|
323 (count, buffer))
|
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428
|
324 {
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|
|
325 /* This function can GC */
|
|
444
|
326 return casify_word (CASE_CAPITALIZE, count, buffer);
|
|
428
|
327 }
|
|
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328
|
|
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329
|
|
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330 void
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|
|
331 syms_of_casefiddle (void)
|
|
|
332 {
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|
333 DEFSUBR (Fupcase);
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|
334 DEFSUBR (Fdowncase);
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335 DEFSUBR (Fcapitalize);
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336 DEFSUBR (Fupcase_initials);
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|
337 DEFSUBR (Fupcase_region);
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338 DEFSUBR (Fdowncase_region);
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339 DEFSUBR (Fcapitalize_region);
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340 DEFSUBR (Fupcase_initials_region);
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|
341 DEFSUBR (Fupcase_word);
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|
342 DEFSUBR (Fdowncase_word);
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|
|
343 DEFSUBR (Fcapitalize_word);
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|
|
344 }
|
