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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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867
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43 Ichar 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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867
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53 Ibyte *storage =
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2367
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54 alloca_ibytes (XSTRING_LENGTH (string_or_char) * MAX_ICHAR_LEN);
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867
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55 Ibyte *newp = storage;
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56 Ibyte *oldp = XSTRING_DATA (string_or_char);
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57 Ibyte *endp = oldp + XSTRING_LENGTH (string_or_char);
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428
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58 int wordp = 0, wordp_prev;
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59
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771
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60 while (oldp < endp)
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428
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61 {
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867
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62 Ichar c = itext_ichar (oldp);
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428
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63 switch (flag)
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64 {
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65 case CASE_UP:
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66 c = UPCASE (buf, c);
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67 break;
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68 case CASE_DOWN:
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69 c = DOWNCASE (buf, c);
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70 break;
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71 case CASE_CAPITALIZE:
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72 case CASE_CAPITALIZE_UP:
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73 wordp_prev = wordp;
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74 wordp = WORD_SYNTAX_P (syntax_table, c);
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75 if (!wordp) break;
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76 if (wordp_prev)
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77 {
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78 if (flag == CASE_CAPITALIZE)
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79 c = DOWNCASE (buf, c);
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80 }
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81 else
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82 c = UPCASE (buf, c);
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83 break;
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84 }
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85
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867
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86 newp += set_itext_ichar (newp, c);
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87 INC_IBYTEPTR (oldp);
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428
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88 }
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89
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90 return make_string (storage, newp - storage);
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91 }
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92
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444
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93 string_or_char = wrong_type_argument (Qchar_or_string_p, string_or_char);
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428
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94 goto retry;
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95 }
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96
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97 DEFUN ("upcase", Fupcase, 1, 2, 0, /*
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444
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98 Convert STRING-OR-CHAR to upper case and return that.
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99 STRING-OR-CHAR may be a character or string. The result has the same type.
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100 STRING-OR-CHAR is not altered--the value is a copy.
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428
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101 See also `capitalize', `downcase' and `upcase-initials'.
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102 Optional second arg BUFFER specifies which buffer's case tables to use,
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103 and defaults to the current buffer.
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104 */
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444
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105 (string_or_char, buffer))
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428
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106 {
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444
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107 return casify_object (CASE_UP, string_or_char, buffer);
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428
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108 }
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109
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110 DEFUN ("downcase", Fdowncase, 1, 2, 0, /*
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444
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111 Convert STRING-OR-CHAR to lower case and return that.
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112 STRING-OR-CHAR may be a character or string. The result has the same type.
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113 STRING-OR-CHAR is not altered--the value is a copy.
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428
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114 Optional second arg BUFFER specifies which buffer's case tables to use,
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115 and defaults to the current buffer.
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116 */
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444
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117 (string_or_char, buffer))
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428
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118 {
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444
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119 return casify_object (CASE_DOWN, string_or_char, buffer);
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428
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120 }
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121
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122 DEFUN ("capitalize", Fcapitalize, 1, 2, 0, /*
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444
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123 Convert STRING-OR-CHAR to capitalized form and return that.
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428
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124 This means that each word's first character is upper case
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125 and the rest is lower case.
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444
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126 STRING-OR-CHAR may be a character or string. The result has the same type.
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127 STRING-OR-CHAR is not altered--the value is a copy.
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428
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128 Optional second arg BUFFER specifies which buffer's case tables to use,
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129 and defaults to the current buffer.
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130 */
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444
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131 (string_or_char, buffer))
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428
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132 {
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444
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133 return casify_object (CASE_CAPITALIZE, string_or_char, buffer);
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428
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134 }
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135
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136 /* Like Fcapitalize but change only the initial characters. */
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137
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138 DEFUN ("upcase-initials", Fupcase_initials, 1, 2, 0, /*
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444
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139 Convert the initial of each word in STRING-OR-CHAR to upper case.
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428
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140 Do not change the other letters of each word.
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444
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141 STRING-OR-CHAR may be a character or string. The result has the same type.
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142 STRING-OR-CHAR is not altered--the value is a copy.
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428
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143 Optional second arg BUFFER specifies which buffer's case tables to use,
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144 and defaults to the current buffer.
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145 */
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444
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146 (string_or_char, buffer))
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428
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147 {
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444
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148 return casify_object (CASE_CAPITALIZE_UP, string_or_char, buffer);
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428
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149 }
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150
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151 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
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444
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152 START and END specify range of buffer to operate on. */
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428
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153
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154 static void
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444
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155 casify_region_internal (enum case_action flag, Lisp_Object start,
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156 Lisp_Object end, struct buffer *buf)
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428
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157 {
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158 /* This function can GC */
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665
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159 Charbpos pos, s, e;
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826
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160 Lisp_Object syntax_table = buf->mirror_syntax_table;
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428
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161 int mccount;
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162 int wordp = 0, wordp_prev;
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163
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444
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164 if (EQ (start, end))
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428
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165 /* Not modifying because nothing marked */
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166 return;
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167
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444
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168 get_buffer_range_char (buf, start, end, &s, &e, 0);
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169
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170 mccount = begin_multiple_change (buf, s, e);
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171 record_change (buf, s, e - s);
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428
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172
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444
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173 for (pos = s; pos < e; pos++)
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428
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174 {
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867
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175 Ichar oldc = BUF_FETCH_CHAR (buf, pos);
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176 Ichar c = oldc;
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428
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177
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178 switch (flag)
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179 {
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180 case CASE_UP:
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181 c = UPCASE (buf, oldc);
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182 break;
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183 case CASE_DOWN:
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184 c = DOWNCASE (buf, oldc);
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185 break;
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186 case CASE_CAPITALIZE:
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187 case CASE_CAPITALIZE_UP:
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188 /* !!#### need to revalidate the start and end pointers in case
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189 the buffer was changed */
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190 wordp_prev = wordp;
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191 wordp = WORD_SYNTAX_P (syntax_table, c);
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192 if (!wordp) continue;
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193 if (wordp_prev)
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194 {
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195 if (flag == CASE_CAPITALIZE)
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196 c = DOWNCASE (buf, c);
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197 }
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198 else
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199 c = UPCASE (buf, c);
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200 break;
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201 }
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202
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203 if (oldc == c) continue;
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444
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204 buffer_replace_char (buf, pos, c, 1, (pos == s));
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428
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205 BUF_MODIFF (buf)++;
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206 }
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207
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208 end_multiple_change (buf, mccount);
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209 }
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210
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211 static Lisp_Object
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444
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212 casify_region (enum case_action flag, Lisp_Object start, Lisp_Object end,
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428
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213 Lisp_Object buffer)
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214 {
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444
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215 casify_region_internal (flag, start, end, decode_buffer (buffer, 1));
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428
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216 return Qnil;
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217 }
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218
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219 DEFUN ("upcase-region", Fupcase_region, 2, 3, "r", /*
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220 Convert the region to upper case. In programs, wants two arguments.
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221 These arguments specify the starting and ending character numbers of
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222 the region to operate on. When used as a command, the text between
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223 point and the mark is operated on.
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224 See also `capitalize-region'.
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225 Optional third arg BUFFER defaults to the current buffer.
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226 */
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444
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227 (start, end, buffer))
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428
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228 {
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229 /* This function can GC */
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444
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230 return casify_region (CASE_UP, start, end, buffer);
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428
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231 }
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232
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233 DEFUN ("downcase-region", Fdowncase_region, 2, 3, "r", /*
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234 Convert the region to lower case. In programs, wants two arguments.
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235 These arguments specify the starting and ending character numbers of
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236 the region to operate on. When used as a command, the text between
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237 point and the mark is operated on.
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238 Optional third arg BUFFER defaults to the current buffer.
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239 */
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444
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240 (start, end, buffer))
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428
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241 {
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242 /* This function can GC */
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444
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243 return casify_region (CASE_DOWN, start, end, buffer);
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428
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244 }
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245
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246 DEFUN ("capitalize-region", Fcapitalize_region, 2, 3, "r", /*
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247 Convert the region to capitalized form.
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248 Capitalized form means each word's first character is upper case
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249 and the rest of it is lower case.
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250 In programs, give two arguments, the starting and ending
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251 character positions to operate on.
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252 Optional third arg BUFFER defaults to the current buffer.
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253 */
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444
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254 (start, end, buffer))
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428
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255 {
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256 /* This function can GC */
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444
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257 return casify_region (CASE_CAPITALIZE, start, end, buffer);
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428
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258 }
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259
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260 /* Like Fcapitalize_region but change only the initials. */
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261
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262 DEFUN ("upcase-initials-region", Fupcase_initials_region, 2, 3, "r", /*
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263 Upcase the initial of each word in the region.
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264 Subsequent letters of each word are not changed.
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265 In programs, give two arguments, the starting and ending
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266 character positions to operate on.
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267 Optional third arg BUFFER defaults to the current buffer.
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268 */
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444
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269 (start, end, buffer))
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428
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270 {
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444
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271 return casify_region (CASE_CAPITALIZE_UP, start, end, buffer);
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428
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272 }
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273
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274
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275 static Lisp_Object
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276 casify_word (enum case_action flag, Lisp_Object arg, Lisp_Object buffer)
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277 {
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665
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278 Charbpos farend;
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428
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279 struct buffer *buf = decode_buffer (buffer, 1);
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280
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281 CHECK_INT (arg);
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282
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283 farend = scan_words (buf, BUF_PT (buf), XINT (arg));
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284 if (!farend)
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285 farend = XINT (arg) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
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286
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287 casify_region_internal (flag, make_int (BUF_PT (buf)), make_int (farend), buf);
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288 BUF_SET_PT (buf, max (BUF_PT (buf), farend));
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289 return Qnil;
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290 }
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291
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292 DEFUN ("upcase-word", Fupcase_word, 1, 2, "p", /*
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444
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293 Convert following word (or COUNT words) to upper case, moving over.
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428
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294 With negative argument, convert previous words but do not move.
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295 See also `capitalize-word'.
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296 Optional second arg BUFFER defaults to the current buffer.
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297 */
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444
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298 (count, buffer))
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428
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299 {
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300 /* This function can GC */
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444
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301 return casify_word (CASE_UP, count, buffer);
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428
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302 }
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303
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304 DEFUN ("downcase-word", Fdowncase_word, 1, 2, "p", /*
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444
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305 Convert following word (or COUNT words) to lower case, moving over.
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428
|
306 With negative argument, convert previous words but do not move.
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307 Optional second arg BUFFER defaults to the current buffer.
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308 */
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444
|
309 (count, buffer))
|
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428
|
310 {
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311 /* This function can GC */
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444
|
312 return casify_word (CASE_DOWN, count, buffer);
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428
|
313 }
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314
|
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315 DEFUN ("capitalize-word", Fcapitalize_word, 1, 2, "p", /*
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444
|
316 Capitalize the following word (or COUNT words), moving over.
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|
428
|
317 This gives the word(s) a first character in upper case
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|
|
318 and the rest lower case.
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319 With negative argument, capitalize previous words but do not move.
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320 Optional second arg BUFFER defaults to the current buffer.
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321 */
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444
|
322 (count, buffer))
|
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428
|
323 {
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|
|
324 /* This function can GC */
|
|
444
|
325 return casify_word (CASE_CAPITALIZE, count, buffer);
|
|
428
|
326 }
|
|
|
327
|
|
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328
|
|
|
329 void
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|
|
330 syms_of_casefiddle (void)
|
|
|
331 {
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|
|
332 DEFSUBR (Fupcase);
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|
333 DEFSUBR (Fdowncase);
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|
334 DEFSUBR (Fcapitalize);
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335 DEFSUBR (Fupcase_initials);
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336 DEFSUBR (Fupcase_region);
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337 DEFSUBR (Fdowncase_region);
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338 DEFSUBR (Fcapitalize_region);
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339 DEFSUBR (Fupcase_initials_region);
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|
340 DEFSUBR (Fupcase_word);
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|
341 DEFSUBR (Fdowncase_word);
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|
|
342 DEFSUBR (Fcapitalize_word);
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|
|
343 }
|
