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428
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1 /* XEmacs routines to deal with syntax tables; also word and list parsing.
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2 Copyright (C) 1985-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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771
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4 Copyright (C) 2001 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.28. */
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24
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25 /* This file has been Mule-ized. */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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30 #include "buffer.h"
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31 #include "syntax.h"
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460
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32 #include "extents.h"
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428
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33
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34 /* Here is a comment from Ken'ichi HANDA <handa@etl.go.jp>
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35 explaining the purpose of the Sextword syntax category:
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36
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37 Japanese words are not separated by spaces, which makes finding word
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38 boundaries very difficult. Theoretically it's impossible without
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39 using natural language processing techniques. But, by defining
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40 pseudo-words as below (much simplified for letting you understand it
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41 easily) for Japanese, we can have a convenient forward-word function
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42 for Japanese.
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43
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44 A Japanese word is a sequence of characters that consists of
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45 zero or more Kanji characters followed by zero or more
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46 Hiragana characters.
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47
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48 Then, the problem is that now we can't say that a sequence of
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49 word-constituents makes up a WORD. For instance, both Hiragana "A"
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50 and Kanji "KAN" are word-constituents but the sequence of these two
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51 letters can't be a single word.
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52
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53 So, we introduced Sextword for Japanese letters. A character of
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54 Sextword is a word-constituent but a word boundary may exist between
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55 two such characters. */
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56
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57 /* Mule 2.4 doesn't seem to have Sextword - I'm removing it -- mrb */
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58 /* Recovered by tomo */
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59
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460
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60 #define ST_COMMENT_STYLE 0x101
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61 #define ST_STRING_STYLE 0x102
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62
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63 Lisp_Object Qsyntax_table;
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64 int lookup_syntax_properties;
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65
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428
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66 Lisp_Object Qsyntax_table_p;
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67
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68 int words_include_escapes;
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69
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70 int parse_sexp_ignore_comments;
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71
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72 /* The following two variables are provided to tell additional information
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73 to the regex routines. We do it this way rather than change the
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74 arguments to re_search_2() in an attempt to maintain some call
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75 compatibility with other versions of the regex code. */
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76
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77 /* Tell the regex routines not to QUIT. Normally there is a QUIT
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78 each iteration in re_search_2(). */
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79 int no_quit_in_re_search;
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80
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81 /* Tell the regex routines which buffer to access for SYNTAX() lookups
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82 and the like. */
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83 struct buffer *regex_emacs_buffer;
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84
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460
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85 /* In Emacs, this is the string or buffer in which we
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86 are matching. It is used for looking up syntax properties. */
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87 Lisp_Object regex_match_object;
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442
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88
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428
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89 Lisp_Object Vstandard_syntax_table;
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90
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91 Lisp_Object Vsyntax_designator_chars_string;
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92
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93 /* This is the internal form of the parse state used in parse-partial-sexp. */
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94
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95 struct lisp_parse_state
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96 {
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97 int depth; /* Depth at end of parsing */
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98 Emchar instring; /* -1 if not within string, else desired terminator */
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99 int incomment; /* Nonzero if within a comment at end of parsing */
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460
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100 int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE */
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428
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101 int quoted; /* Nonzero if just after an escape char at end of
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102 parsing */
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665
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103 Charbpos thislevelstart;/* Char number of most recent start-of-expression
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428
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104 at current level */
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665
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105 Charbpos prevlevelstart;/* Char number of start of containing expression */
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106 Charbpos location; /* Char number at which parsing stopped */
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428
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107 int mindepth; /* Minimum depth seen while scanning */
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665
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108 Charbpos comstr_start; /* Position just after last comment/string starter */
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460
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109 Lisp_Object levelstarts; /* Char numbers of starts-of-expression
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110 of levels (starting from outermost). */
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428
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111 };
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112
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113 /* These variables are a cache for finding the start of a defun.
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114 find_start_pos is the place for which the defun start was found.
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115 find_start_value is the defun start position found for it.
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116 find_start_buffer is the buffer it was found in.
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117 find_start_begv is the BEGV value when it was found.
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118 find_start_modiff is the value of MODIFF when it was found. */
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119
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665
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120 static Charbpos find_start_pos;
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121 static Charbpos find_start_value;
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428
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122 static struct buffer *find_start_buffer;
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665
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123 static Charbpos find_start_begv;
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428
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124 static int find_start_modiff;
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125
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126 /* Find a defun-start that is the last one before POS (or nearly the last).
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127 We record what we find, so that another call in the same area
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128 can return the same value right away. */
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129
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665
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130 static Charbpos
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131 find_defun_start (struct buffer *buf, Charbpos pos)
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428
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132 {
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665
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133 Charbpos tem;
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428
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134
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135 /* Use previous finding, if it's valid and applies to this inquiry. */
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136 if (buf == find_start_buffer
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137 /* Reuse the defun-start even if POS is a little farther on.
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138 POS might be in the next defun, but that's ok.
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139 Our value may not be the best possible, but will still be usable. */
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140 && pos <= find_start_pos + 1000
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141 && pos >= find_start_value
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142 && BUF_BEGV (buf) == find_start_begv
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143 && BUF_MODIFF (buf) == find_start_modiff)
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144 return find_start_value;
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145
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146 /* Back up to start of line. */
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147 tem = find_next_newline (buf, pos, -1);
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148
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460
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149 SETUP_SYNTAX_CACHE (tem, 1);
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428
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150 while (tem > BUF_BEGV (buf))
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151 {
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460
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152 UPDATE_SYNTAX_CACHE_BACKWARD(tem);
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153
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428
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154 /* Open-paren at start of line means we found our defun-start. */
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460
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155 if (SYNTAX_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, tem)) == Sopen)
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428
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156 break;
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157 /* Move to beg of previous line. */
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158 tem = find_next_newline (buf, tem, -2);
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159 }
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160
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161 /* Record what we found, for the next try. */
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162 find_start_value = tem;
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163 find_start_buffer = buf;
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164 find_start_modiff = BUF_MODIFF (buf);
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165 find_start_begv = BUF_BEGV (buf);
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166 find_start_pos = pos;
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167
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168 return find_start_value;
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169 }
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170
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171 DEFUN ("syntax-table-p", Fsyntax_table_p, 1, 1, 0, /*
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444
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172 Return t if OBJECT is a syntax table.
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428
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173 Any vector of 256 elements will do.
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174 */
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444
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175 (object))
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428
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176 {
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444
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177 return (CHAR_TABLEP (object)
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178 && XCHAR_TABLE_TYPE (object) == CHAR_TABLE_TYPE_SYNTAX)
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428
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179 ? Qt : Qnil;
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180 }
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181
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182 static Lisp_Object
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183 check_syntax_table (Lisp_Object obj, Lisp_Object default_)
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184 {
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185 if (NILP (obj))
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186 obj = default_;
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187 while (NILP (Fsyntax_table_p (obj)))
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188 obj = wrong_type_argument (Qsyntax_table_p, obj);
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189 return obj;
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190 }
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191
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192 DEFUN ("syntax-table", Fsyntax_table, 0, 1, 0, /*
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193 Return the current syntax table.
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194 This is the one specified by the current buffer, or by BUFFER if it
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195 is non-nil.
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196 */
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197 (buffer))
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198 {
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199 return decode_buffer (buffer, 0)->syntax_table;
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200 }
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201
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202 DEFUN ("standard-syntax-table", Fstandard_syntax_table, 0, 0, 0, /*
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203 Return the standard syntax table.
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204 This is the one used for new buffers.
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205 */
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206 ())
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207 {
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208 return Vstandard_syntax_table;
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209 }
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210
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211 DEFUN ("copy-syntax-table", Fcopy_syntax_table, 0, 1, 0, /*
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444
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212 Return a new syntax table which is a copy of SYNTAX-TABLE.
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213 SYNTAX-TABLE defaults to the standard syntax table.
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428
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214 */
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444
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215 (syntax_table))
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428
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216 {
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217 if (NILP (Vstandard_syntax_table))
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218 return Fmake_char_table (Qsyntax);
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219
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444
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220 syntax_table = check_syntax_table (syntax_table, Vstandard_syntax_table);
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221 return Fcopy_char_table (syntax_table);
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428
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222 }
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223
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224 DEFUN ("set-syntax-table", Fset_syntax_table, 1, 2, 0, /*
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444
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225 Select SYNTAX-TABLE as the new syntax table for BUFFER.
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428
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226 BUFFER defaults to the current buffer if omitted.
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227 */
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444
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228 (syntax_table, buffer))
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428
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229 {
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230 struct buffer *buf = decode_buffer (buffer, 0);
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444
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231 syntax_table = check_syntax_table (syntax_table, Qnil);
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232 buf->syntax_table = syntax_table;
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233 buf->mirror_syntax_table = XCHAR_TABLE (syntax_table)->mirror_table;
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428
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234 /* Indicate that this buffer now has a specified syntax table. */
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235 buf->local_var_flags |= XINT (buffer_local_flags.syntax_table);
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444
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236 return syntax_table;
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428
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237 }
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238
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460
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239 /* The current syntax state */
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240 struct syntax_cache syntax_cache;
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241
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242
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243 /*
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244 Update syntax_cache to an appropriate setting for position POS
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245
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246 The sign of COUNT gives the relative position of POS wrt the
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247 previously valid interval. (not currently used)
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248
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249 `syntax_cache.*_change' are the next and previous positions at
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250 which syntax_code and c_s_t will need to be recalculated.
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251
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252 #### Currently this code uses 'get-char-property', which will
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253 return the "last smallest" extent at a given position. In cases
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254 where overlapping extents are defined, this code will simply use
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255 whatever is returned by get-char-property.
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256
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257 It might be worth it at some point to merge provided syntax tables
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258 outward to the current buffer. */
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259
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260 void
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261 update_syntax_cache (int pos, int count, int init)
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262 {
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263 Lisp_Object tmp_table;
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264
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265 if (init)
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266 {
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267 syntax_cache.prev_change = -1;
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268 syntax_cache.next_change = -1;
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269 }
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270
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271 if (pos > syntax_cache.prev_change &&
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272 pos < syntax_cache.next_change)
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273 {
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274 /* do nothing */
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275 }
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276 else
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277 {
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278 if (NILP (syntax_cache.object) || EQ (syntax_cache.object, Qt))
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279 {
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280 int get_change_before = pos + 1;
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281
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282 tmp_table = Fget_char_property (make_int(pos), Qsyntax_table,
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771
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283 wrap_buffer (syntax_cache.buffer), Qnil);
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460
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284 syntax_cache.next_change =
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285 XINT (Fnext_extent_change (make_int (pos > 0 ? pos : 1),
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771
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286 wrap_buffer (syntax_cache.buffer)));
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460
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287
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288 if (get_change_before < 1)
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289 get_change_before = 1;
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290 else if (get_change_before > BUF_ZV (syntax_cache.buffer))
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291 get_change_before = BUF_ZV (syntax_cache.buffer);
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292
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293 syntax_cache.prev_change =
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294 XINT (Fprevious_extent_change (make_int (get_change_before),
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771
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295 wrap_buffer (syntax_cache.buffer)));
|
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460
|
296 }
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297 else
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298 {
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299 int get_change_before = pos + 1;
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300
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301 tmp_table = Fget_char_property (make_int(pos), Qsyntax_table,
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302 syntax_cache.object, Qnil);
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303 syntax_cache.next_change =
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304 XINT (Fnext_extent_change (make_int (pos >= 0 ? pos : 0),
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305 syntax_cache.object));
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306
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307 if (get_change_before < 0)
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308 get_change_before = 0;
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309 else if (get_change_before > XSTRING_LENGTH(syntax_cache.object))
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310 get_change_before = XSTRING_LENGTH(syntax_cache.object);
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311
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312 syntax_cache.prev_change =
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313 XINT (Fprevious_extent_change (make_int (pos >= 0 ? pos : 0),
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314 syntax_cache.object));
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315 }
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316
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317 if (EQ (Fsyntax_table_p (tmp_table), Qt))
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318 {
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319 syntax_cache.use_code = 0;
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320 syntax_cache.current_syntax_table =
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321 XCHAR_TABLE (tmp_table)->mirror_table;
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322 }
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323 else if (CONSP (tmp_table) && INTP (XCAR (tmp_table)))
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324 {
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325 syntax_cache.use_code = 1;
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326 syntax_cache.syntax_code = XINT (XCAR(tmp_table));
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327 }
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328 else
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329 {
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330 syntax_cache.use_code = 0;
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|
331 syntax_cache.current_syntax_table =
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332 syntax_cache.buffer->mirror_syntax_table;
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333 }
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334 }
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335 }
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336
|
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428
|
337 /* Convert a letter which signifies a syntax code
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338 into the code it signifies.
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|
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339 This is used by modify-syntax-entry, and other things. */
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|
|
340
|
|
442
|
341 const unsigned char syntax_spec_code[0400] =
|
|
428
|
342 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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343 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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344 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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345 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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|
346 (char) Swhitespace, 0377, (char) Sstring, 0377,
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347 (char) Smath, 0377, 0377, (char) Squote,
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348 (char) Sopen, (char) Sclose, 0377, 0377,
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349 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote,
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350 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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|
351 0377, 0377, 0377, 0377,
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352 (char) Scomment, 0377, (char) Sendcomment, 0377,
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|
353 (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */
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354 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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|
355 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
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|
356 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol,
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|
|
357 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */
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|
|
358 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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|
|
359 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
|
|
460
|
360 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377
|
|
428
|
361 };
|
|
|
362
|
|
460
|
363 const unsigned char syntax_code_spec[] = " .w_()'\"$\\/<>@!|";
|
|
428
|
364
|
|
|
365 DEFUN ("syntax-designator-chars", Fsyntax_designator_chars, 0, 0, 0, /*
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|
|
366 Return a string of the recognized syntax designator chars.
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|
|
367 The chars are ordered by their internal syntax codes, which are
|
|
|
368 numbered starting at 0.
|
|
|
369 */
|
|
|
370 ())
|
|
|
371 {
|
|
|
372 return Vsyntax_designator_chars_string;
|
|
|
373 }
|
|
|
374
|
|
|
375 DEFUN ("char-syntax", Fchar_syntax, 1, 2, 0, /*
|
|
444
|
376 Return the syntax code of CHARACTER, described by a character.
|
|
|
377 For example, if CHARACTER is a word constituent,
|
|
|
378 the character `?w' is returned.
|
|
428
|
379 The characters that correspond to various syntax codes
|
|
|
380 are listed in the documentation of `modify-syntax-entry'.
|
|
444
|
381 Optional second argument SYNTAX-TABLE defaults to the current buffer's
|
|
428
|
382 syntax table.
|
|
|
383 */
|
|
444
|
384 (character, syntax_table))
|
|
428
|
385 {
|
|
440
|
386 Lisp_Char_Table *mirrortab;
|
|
428
|
387
|
|
444
|
388 if (NILP (character))
|
|
428
|
389 {
|
|
444
|
390 character = make_char ('\000');
|
|
428
|
391 }
|
|
444
|
392 CHECK_CHAR_COERCE_INT (character);
|
|
|
393 syntax_table = check_syntax_table (syntax_table, current_buffer->syntax_table);
|
|
|
394 mirrortab = XCHAR_TABLE (XCHAR_TABLE (syntax_table)->mirror_table);
|
|
|
395 return make_char (syntax_code_spec[(int) SYNTAX (mirrortab, XCHAR (character))]);
|
|
428
|
396 }
|
|
|
397
|
|
|
398 #ifdef MULE
|
|
|
399
|
|
|
400 enum syntaxcode
|
|
|
401 charset_syntax (struct buffer *buf, Lisp_Object charset, int *multi_p_out)
|
|
|
402 {
|
|
|
403 *multi_p_out = 1;
|
|
|
404 /* #### get this right */
|
|
|
405 return Spunct;
|
|
|
406 }
|
|
|
407
|
|
|
408 #endif
|
|
|
409
|
|
|
410 Lisp_Object
|
|
444
|
411 syntax_match (Lisp_Object syntax_table, Emchar ch)
|
|
428
|
412 {
|
|
444
|
413 Lisp_Object code = XCHAR_TABLE_VALUE_UNSAFE (syntax_table, ch);
|
|
428
|
414 Lisp_Object code2 = code;
|
|
|
415
|
|
|
416 if (CONSP (code))
|
|
|
417 code2 = XCAR (code);
|
|
|
418 if (SYNTAX_FROM_CODE (XINT (code2)) == Sinherit)
|
|
442
|
419 code = XCHAR_TABLE_VALUE_UNSAFE (Vstandard_syntax_table, ch);
|
|
428
|
420
|
|
|
421 return CONSP (code) ? XCDR (code) : Qnil;
|
|
|
422 }
|
|
|
423
|
|
|
424 DEFUN ("matching-paren", Fmatching_paren, 1, 2, 0, /*
|
|
444
|
425 Return the matching parenthesis of CHARACTER, or nil if none.
|
|
|
426 Optional second argument SYNTAX-TABLE defaults to the current buffer's
|
|
428
|
427 syntax table.
|
|
|
428 */
|
|
444
|
429 (character, syntax_table))
|
|
428
|
430 {
|
|
440
|
431 Lisp_Char_Table *mirrortab;
|
|
428
|
432 int code;
|
|
|
433
|
|
444
|
434 CHECK_CHAR_COERCE_INT (character);
|
|
|
435 syntax_table = check_syntax_table (syntax_table, current_buffer->syntax_table);
|
|
|
436 mirrortab = XCHAR_TABLE (XCHAR_TABLE (syntax_table)->mirror_table);
|
|
|
437 code = SYNTAX (mirrortab, XCHAR (character));
|
|
428
|
438 if (code == Sopen || code == Sclose || code == Sstring)
|
|
444
|
439 return syntax_match (syntax_table, XCHAR (character));
|
|
428
|
440 return Qnil;
|
|
|
441 }
|
|
|
442
|
|
|
443
|
|
|
444
|
|
|
445 #ifdef MULE
|
|
|
446 /* Return 1 if there is a word boundary between two word-constituent
|
|
|
447 characters C1 and C2 if they appear in this order, else return 0.
|
|
|
448 There is no word boundary between two word-constituent ASCII
|
|
|
449 characters. */
|
|
|
450 #define WORD_BOUNDARY_P(c1, c2) \
|
|
|
451 (!(CHAR_ASCII_P (c1) && CHAR_ASCII_P (c2)) \
|
|
|
452 && word_boundary_p (c1, c2))
|
|
|
453
|
|
|
454 extern int word_boundary_p (Emchar c1, Emchar c2);
|
|
|
455 #endif
|
|
|
456
|
|
|
457 /* Return the position across COUNT words from FROM.
|
|
|
458 If that many words cannot be found before the end of the buffer, return 0.
|
|
|
459 COUNT negative means scan backward and stop at word beginning. */
|
|
|
460
|
|
665
|
461 Charbpos
|
|
|
462 scan_words (struct buffer *buf, Charbpos from, int count)
|
|
428
|
463 {
|
|
665
|
464 Charbpos limit = count > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
|
|
428
|
465 Emchar ch0, ch1;
|
|
|
466 enum syntaxcode code;
|
|
|
467
|
|
460
|
468 SETUP_SYNTAX_CACHE_FOR_BUFFER (buf, from, count);
|
|
|
469
|
|
428
|
470 /* #### is it really worth it to hand expand both cases? JV */
|
|
|
471 while (count > 0)
|
|
|
472 {
|
|
|
473 QUIT;
|
|
|
474
|
|
|
475 while (1)
|
|
|
476 {
|
|
|
477 if (from == limit)
|
|
|
478 return 0;
|
|
|
479
|
|
460
|
480 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
481 ch0 = BUF_FETCH_CHAR (buf, from);
|
|
460
|
482 code = SYNTAX_FROM_CACHE (mirrortab, ch0);
|
|
428
|
483
|
|
442
|
484 from++;
|
|
428
|
485 if (words_include_escapes
|
|
|
486 && (code == Sescape || code == Scharquote))
|
|
|
487 break;
|
|
|
488 if (code == Sword)
|
|
|
489 break;
|
|
|
490 }
|
|
|
491
|
|
|
492 QUIT;
|
|
|
493
|
|
|
494 while (from != limit)
|
|
|
495 {
|
|
460
|
496 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
497 ch1 = BUF_FETCH_CHAR (buf, from);
|
|
460
|
498 code = SYNTAX_FROM_CACHE (mirrortab, ch1);
|
|
428
|
499 if (!(words_include_escapes
|
|
|
500 && (code == Sescape || code == Scharquote)))
|
|
|
501 if (code != Sword
|
|
|
502 #ifdef MULE
|
|
|
503 || WORD_BOUNDARY_P (ch0, ch1)
|
|
434
|
504 #endif
|
|
428
|
505 )
|
|
|
506 break;
|
|
|
507 #ifdef MULE
|
|
|
508 ch0 = ch1;
|
|
434
|
509 #endif
|
|
428
|
510 from++;
|
|
|
511 }
|
|
|
512 count--;
|
|
|
513 }
|
|
|
514
|
|
|
515 while (count < 0)
|
|
|
516 {
|
|
|
517 QUIT;
|
|
|
518
|
|
|
519 while (1)
|
|
|
520 {
|
|
|
521 if (from == limit)
|
|
|
522 return 0;
|
|
|
523
|
|
460
|
524 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
428
|
525 ch1 = BUF_FETCH_CHAR (buf, from - 1);
|
|
460
|
526 code = SYNTAX_FROM_CACHE (mirrortab, ch1);
|
|
|
527 from--;
|
|
442
|
528
|
|
428
|
529 if (words_include_escapes
|
|
|
530 && (code == Sescape || code == Scharquote))
|
|
|
531 break;
|
|
|
532 if (code == Sword)
|
|
|
533 break;
|
|
|
534 }
|
|
|
535
|
|
|
536 QUIT;
|
|
|
537
|
|
|
538 while (from != limit)
|
|
|
539 {
|
|
460
|
540 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
428
|
541 ch0 = BUF_FETCH_CHAR (buf, from - 1);
|
|
460
|
542 code = SYNTAX_FROM_CACHE (mirrortab, ch0);
|
|
|
543
|
|
428
|
544 if (!(words_include_escapes
|
|
|
545 && (code == Sescape || code == Scharquote)))
|
|
|
546 if (code != Sword
|
|
|
547 #ifdef MULE
|
|
|
548 || WORD_BOUNDARY_P (ch0, ch1)
|
|
|
549 #endif
|
|
|
550 )
|
|
|
551 break;
|
|
|
552 #ifdef MULE
|
|
|
553 ch1 = ch0;
|
|
|
554 #endif
|
|
|
555 from--;
|
|
|
556 }
|
|
|
557 count++;
|
|
|
558 }
|
|
|
559
|
|
|
560 return from;
|
|
|
561 }
|
|
|
562
|
|
446
|
563 DEFUN ("forward-word", Fforward_word, 0, 2, "_p", /*
|
|
428
|
564 Move point forward COUNT words (backward if COUNT is negative).
|
|
446
|
565 Normally t is returned, but if an edge of the buffer is reached,
|
|
|
566 point is left there and nil is returned.
|
|
428
|
567
|
|
462
|
568 The characters that are moved over may be added to the current selection
|
|
|
569 \(i.e. active region) if the Shift key is held down, a motion key is used
|
|
|
570 to invoke this command, and `shifted-motion-keys-select-region' is t; see
|
|
|
571 the documentation for this variable for more details.
|
|
|
572
|
|
446
|
573 COUNT defaults to 1, and BUFFER defaults to the current buffer.
|
|
428
|
574 */
|
|
|
575 (count, buffer))
|
|
|
576 {
|
|
665
|
577 Charbpos val;
|
|
428
|
578 struct buffer *buf = decode_buffer (buffer, 0);
|
|
446
|
579 EMACS_INT n;
|
|
|
580
|
|
|
581 if (NILP (count))
|
|
|
582 n = 1;
|
|
|
583 else
|
|
|
584 {
|
|
|
585 CHECK_INT (count);
|
|
|
586 n = XINT (count);
|
|
|
587 }
|
|
428
|
588
|
|
446
|
589 val = scan_words (buf, BUF_PT (buf), n);
|
|
|
590 if (val)
|
|
428
|
591 {
|
|
446
|
592 BUF_SET_PT (buf, val);
|
|
|
593 return Qt;
|
|
|
594 }
|
|
|
595 else
|
|
|
596 {
|
|
|
597 BUF_SET_PT (buf, n > 0 ? BUF_ZV (buf) : BUF_BEGV (buf));
|
|
428
|
598 return Qnil;
|
|
|
599 }
|
|
|
600 }
|
|
|
601
|
|
|
602 static void scan_sexps_forward (struct buffer *buf,
|
|
|
603 struct lisp_parse_state *,
|
|
665
|
604 Charbpos from, Charbpos end,
|
|
428
|
605 int targetdepth, int stopbefore,
|
|
|
606 Lisp_Object oldstate,
|
|
|
607 int commentstop);
|
|
|
608
|
|
|
609 static int
|
|
665
|
610 find_start_of_comment (struct buffer *buf, Charbpos from, Charbpos stop,
|
|
460
|
611 int comstyle)
|
|
428
|
612 {
|
|
|
613 Emchar c;
|
|
|
614 enum syntaxcode code;
|
|
|
615
|
|
|
616 /* Look back, counting the parity of string-quotes,
|
|
|
617 and recording the comment-starters seen.
|
|
|
618 When we reach a safe place, assume that's not in a string;
|
|
|
619 then step the main scan to the earliest comment-starter seen
|
|
|
620 an even number of string quotes away from the safe place.
|
|
|
621
|
|
|
622 OFROM[I] is position of the earliest comment-starter seen
|
|
|
623 which is I+2X quotes from the comment-end.
|
|
|
624 PARITY is current parity of quotes from the comment end. */
|
|
|
625 int parity = 0;
|
|
|
626 Emchar my_stringend = 0;
|
|
|
627 int string_lossage = 0;
|
|
665
|
628 Charbpos comment_end = from;
|
|
|
629 Charbpos comstart_pos = 0;
|
|
428
|
630 int comstart_parity = 0;
|
|
|
631 int styles_match_p = 0;
|
|
460
|
632 /* mask to match comment styles against; for ST_COMMENT_STYLE, this
|
|
|
633 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */
|
|
|
634 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A;
|
|
428
|
635
|
|
|
636 /* At beginning of range to scan, we're outside of strings;
|
|
|
637 that determines quote parity to the comment-end. */
|
|
|
638 while (from != stop)
|
|
|
639 {
|
|
460
|
640 int syncode;
|
|
|
641
|
|
428
|
642 /* Move back and examine a character. */
|
|
|
643 from--;
|
|
460
|
644 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
428
|
645
|
|
|
646 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
647 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
648 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
649
|
|
|
650 /* is this a 1-char comment end sequence? if so, try
|
|
|
651 to see if style matches previously extracted mask */
|
|
|
652 if (code == Sendcomment)
|
|
|
653 {
|
|
|
654 styles_match_p =
|
|
460
|
655 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask;
|
|
428
|
656 }
|
|
|
657
|
|
|
658 /* or are we looking at a 1-char comment start sequence
|
|
|
659 of the style matching mask? */
|
|
460
|
660 else if (code == Scomment)
|
|
428
|
661 {
|
|
460
|
662 styles_match_p =
|
|
|
663 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask;
|
|
428
|
664 }
|
|
|
665
|
|
460
|
666 /* otherwise, is this a 2-char comment end or start sequence? */
|
|
|
667 else if (from > stop)
|
|
|
668 do
|
|
|
669 {
|
|
|
670 /* 2-char comment end sequence? */
|
|
|
671 if (SYNTAX_CODE_END_SECOND_P (syncode))
|
|
|
672 {
|
|
|
673 int prev_syncode;
|
|
|
674 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
|
675 prev_syncode =
|
|
|
676 SYNTAX_CODE_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from - 1));
|
|
|
677
|
|
|
678 if (SYNTAX_CODES_END_P (prev_syncode, syncode))
|
|
|
679 {
|
|
|
680 code = Sendcomment;
|
|
|
681 styles_match_p =
|
|
627
|
682 SYNTAX_CODES_COMMENT_MASK_END (prev_syncode, syncode) & mask;
|
|
460
|
683 from--;
|
|
|
684 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
|
685 c = BUF_FETCH_CHAR (buf, from);
|
|
|
686
|
|
|
687 /* Found a comment-end sequence, so skip past the
|
|
|
688 check for a comment-start */
|
|
|
689 break;
|
|
|
690 }
|
|
|
691 }
|
|
|
692
|
|
|
693 /* 2-char comment start sequence? */
|
|
|
694 if (SYNTAX_CODE_START_SECOND_P (syncode))
|
|
|
695 {
|
|
|
696 int prev_syncode;
|
|
|
697 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
|
698 prev_syncode =
|
|
|
699 SYNTAX_CODE_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from - 1));
|
|
|
700
|
|
|
701 if (SYNTAX_CODES_START_P (prev_syncode, syncode))
|
|
|
702 {
|
|
|
703 code = Scomment;
|
|
|
704 styles_match_p =
|
|
627
|
705 SYNTAX_CODES_COMMENT_MASK_START (prev_syncode, syncode) & mask;
|
|
460
|
706 from--;
|
|
|
707 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
|
708 c = BUF_FETCH_CHAR (buf, from);
|
|
|
709 }
|
|
|
710 }
|
|
|
711 } while (0);
|
|
428
|
712
|
|
|
713 /* Ignore escaped characters. */
|
|
|
714 if (char_quoted (buf, from))
|
|
|
715 continue;
|
|
|
716
|
|
|
717 /* Track parity of quotes. */
|
|
|
718 if (code == Sstring)
|
|
|
719 {
|
|
|
720 parity ^= 1;
|
|
|
721 if (my_stringend == 0)
|
|
|
722 my_stringend = c;
|
|
|
723 /* If we have two kinds of string delimiters.
|
|
|
724 There's no way to grok this scanning backwards. */
|
|
|
725 else if (my_stringend != c)
|
|
|
726 string_lossage = 1;
|
|
|
727 }
|
|
|
728
|
|
460
|
729 if (code == Sstring_fence || code == Scomment_fence)
|
|
|
730 {
|
|
|
731 parity ^= 1;
|
|
|
732 if (my_stringend == 0)
|
|
|
733 my_stringend =
|
|
|
734 code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE;
|
|
|
735 /* If we have two kinds of string delimiters.
|
|
|
736 There's no way to grok this scanning backwards. */
|
|
|
737 else if (my_stringend != (code == Sstring_fence
|
|
|
738 ? ST_STRING_STYLE : ST_COMMENT_STYLE))
|
|
|
739 string_lossage = 1;
|
|
|
740 }
|
|
|
741
|
|
428
|
742 /* Record comment-starters according to that
|
|
|
743 quote-parity to the comment-end. */
|
|
|
744 if (code == Scomment && styles_match_p)
|
|
|
745 {
|
|
|
746 comstart_parity = parity;
|
|
|
747 comstart_pos = from;
|
|
|
748 }
|
|
|
749
|
|
|
750 /* If we find another earlier comment-ender,
|
|
|
751 any comment-starts earlier than that don't count
|
|
|
752 (because they go with the earlier comment-ender). */
|
|
|
753 if (code == Sendcomment && styles_match_p)
|
|
|
754 break;
|
|
|
755
|
|
|
756 /* Assume a defun-start point is outside of strings. */
|
|
|
757 if (code == Sopen
|
|
|
758 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n'))
|
|
|
759 break;
|
|
|
760 }
|
|
|
761
|
|
|
762 if (comstart_pos == 0)
|
|
|
763 from = comment_end;
|
|
|
764 /* If the earliest comment starter
|
|
|
765 is followed by uniform paired string quotes or none,
|
|
|
766 we know it can't be inside a string
|
|
|
767 since if it were then the comment ender would be inside one.
|
|
|
768 So it does start a comment. Skip back to it. */
|
|
|
769 else if (comstart_parity == 0 && !string_lossage)
|
|
|
770 from = comstart_pos;
|
|
|
771 else
|
|
|
772 {
|
|
|
773 /* We had two kinds of string delimiters mixed up
|
|
|
774 together. Decode this going forwards.
|
|
|
775 Scan fwd from the previous comment ender
|
|
|
776 to the one in question; this records where we
|
|
|
777 last passed a comment starter. */
|
|
|
778
|
|
|
779 struct lisp_parse_state state;
|
|
|
780 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end),
|
|
|
781 comment_end - 1, -10000, 0, Qnil, 0);
|
|
|
782 if (state.incomment)
|
|
460
|
783 from = state.comstr_start;
|
|
428
|
784 else
|
|
|
785 /* We can't grok this as a comment; scan it normally. */
|
|
|
786 from = comment_end;
|
|
460
|
787 UPDATE_SYNTAX_CACHE_FORWARD (from - 1);
|
|
428
|
788 }
|
|
|
789 return from;
|
|
|
790 }
|
|
|
791
|
|
665
|
792 static Charbpos
|
|
|
793 find_end_of_comment (struct buffer *buf, Charbpos from, Charbpos stop, int comstyle)
|
|
428
|
794 {
|
|
|
795 int c;
|
|
460
|
796 int prev_code;
|
|
|
797 /* mask to match comment styles against; for ST_COMMENT_STYLE, this
|
|
|
798 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */
|
|
|
799 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A;
|
|
428
|
800
|
|
460
|
801 /* This is only called by functions which have already set up the
|
|
|
802 syntax_cache and are keeping it up-to-date */
|
|
428
|
803 while (1)
|
|
|
804 {
|
|
|
805 if (from == stop)
|
|
|
806 {
|
|
|
807 return -1;
|
|
|
808 }
|
|
460
|
809
|
|
|
810 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
811 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
812
|
|
|
813 /* Test for generic comments */
|
|
|
814 if (comstyle == ST_COMMENT_STYLE)
|
|
|
815 {
|
|
|
816 if (SYNTAX_FROM_CACHE (mirrortab, c) == Scomment_fence)
|
|
|
817 {
|
|
|
818 from++;
|
|
|
819 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
820 break;
|
|
|
821 }
|
|
|
822 from++;
|
|
|
823 continue; /* No need to test other comment styles in a
|
|
|
824 generic comment */
|
|
|
825 }
|
|
|
826 else
|
|
|
827
|
|
|
828 if (SYNTAX_FROM_CACHE (mirrortab, c) == Sendcomment
|
|
|
829 && SYNTAX_CODE_MATCHES_1CHAR_P
|
|
|
830 (SYNTAX_CODE_FROM_CACHE (mirrortab, c), mask))
|
|
428
|
831 /* we have encountered a comment end of the same style
|
|
|
832 as the comment sequence which began this comment
|
|
|
833 section */
|
|
460
|
834 {
|
|
|
835 from++;
|
|
|
836 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
837 break;
|
|
|
838 }
|
|
428
|
839
|
|
460
|
840 prev_code = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
841 from++;
|
|
460
|
842 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
843 if (from < stop
|
|
460
|
844 && SYNTAX_CODES_MATCH_END_P
|
|
|
845 (prev_code,
|
|
|
846 SYNTAX_CODE_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from)),
|
|
|
847 mask)
|
|
|
848
|
|
|
849 )
|
|
428
|
850 /* we have encountered a comment end of the same style
|
|
|
851 as the comment sequence which began this comment
|
|
|
852 section */
|
|
460
|
853 {
|
|
|
854 from++;
|
|
|
855 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
856 break;
|
|
|
857 }
|
|
428
|
858 }
|
|
|
859 return from;
|
|
|
860 }
|
|
|
861
|
|
|
862
|
|
|
863 /* #### between FSF 19.23 and 19.28 there are some changes to the logic
|
|
|
864 in this function (and minor changes to find_start_of_comment(),
|
|
|
865 above, which is part of Fforward_comment() in FSF). Attempts to port
|
|
|
866 that logic made this function break, so I'm leaving it out. If anyone
|
|
|
867 ever complains about this function not working properly, take a look
|
|
|
868 at those changes. --ben */
|
|
|
869
|
|
446
|
870 DEFUN ("forward-comment", Fforward_comment, 0, 2, 0, /*
|
|
444
|
871 Move forward across up to COUNT comments, or backwards if COUNT is negative.
|
|
428
|
872 Stop scanning if we find something other than a comment or whitespace.
|
|
|
873 Set point to where scanning stops.
|
|
444
|
874 If COUNT comments are found as expected, with nothing except whitespace
|
|
428
|
875 between them, return t; otherwise return nil.
|
|
|
876 Point is set in either case.
|
|
446
|
877 COUNT defaults to 1, and BUFFER defaults to the current buffer.
|
|
428
|
878 */
|
|
444
|
879 (count, buffer))
|
|
428
|
880 {
|
|
665
|
881 Charbpos from;
|
|
|
882 Charbpos stop;
|
|
428
|
883 Emchar c;
|
|
|
884 enum syntaxcode code;
|
|
460
|
885 int syncode;
|
|
444
|
886 EMACS_INT n;
|
|
428
|
887 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
888
|
|
446
|
889 if (NILP (count))
|
|
|
890 n = 1;
|
|
|
891 else
|
|
|
892 {
|
|
|
893 CHECK_INT (count);
|
|
|
894 n = XINT (count);
|
|
|
895 }
|
|
428
|
896
|
|
|
897 from = BUF_PT (buf);
|
|
|
898
|
|
460
|
899 SETUP_SYNTAX_CACHE (from, n);
|
|
444
|
900 while (n > 0)
|
|
428
|
901 {
|
|
|
902 QUIT;
|
|
|
903
|
|
|
904 stop = BUF_ZV (buf);
|
|
|
905 while (from < stop)
|
|
|
906 {
|
|
460
|
907 int comstyle = 0; /* mask for finding matching comment style */
|
|
428
|
908
|
|
|
909 if (char_quoted (buf, from))
|
|
|
910 {
|
|
|
911 from++;
|
|
|
912 continue;
|
|
|
913 }
|
|
|
914
|
|
460
|
915 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
916 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
917 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
918 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
919
|
|
|
920 if (code == Scomment)
|
|
|
921 {
|
|
|
922 /* we have encountered a single character comment start
|
|
|
923 sequence, and we are ignoring all text inside comments.
|
|
|
924 we must record the comment style this character begins
|
|
|
925 so that later, only a comment end of the same style actually
|
|
|
926 ends the comment section */
|
|
460
|
927 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode)
|
|
|
928 == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
428
|
929 }
|
|
|
930
|
|
460
|
931 else if (code == Scomment_fence)
|
|
|
932 {
|
|
|
933 from++;
|
|
|
934 code = Scomment;
|
|
|
935 comstyle = ST_COMMENT_STYLE;
|
|
|
936 }
|
|
|
937
|
|
428
|
938 else if (from < stop
|
|
460
|
939 && SYNTAX_CODE_START_FIRST_P (syncode))
|
|
428
|
940 {
|
|
460
|
941 int next_syncode;
|
|
|
942 UPDATE_SYNTAX_CACHE_FORWARD (from + 1);
|
|
|
943 next_syncode =
|
|
|
944 SYNTAX_CODE_FROM_CACHE (mirrortab,
|
|
|
945 BUF_FETCH_CHAR (buf, from + 1));
|
|
|
946
|
|
|
947 if (SYNTAX_CODES_START_P (syncode, next_syncode))
|
|
|
948 {
|
|
|
949 /* we have encountered a 2char comment start sequence and we
|
|
|
950 are ignoring all text inside comments. we must record
|
|
|
951 the comment style this sequence begins so that later,
|
|
|
952 only a comment end of the same style actually ends
|
|
|
953 the comment section */
|
|
|
954 code = Scomment;
|
|
|
955 comstyle =
|
|
|
956 SYNTAX_CODES_COMMENT_MASK_START (syncode, next_syncode)
|
|
|
957 == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
|
958 from++;
|
|
|
959 }
|
|
428
|
960 }
|
|
|
961
|
|
|
962 if (code == Scomment)
|
|
|
963 {
|
|
665
|
964 Charbpos newfrom = find_end_of_comment (buf, from, stop, comstyle);
|
|
428
|
965 if (newfrom < 0)
|
|
|
966 {
|
|
|
967 /* we stopped because from==stop */
|
|
|
968 BUF_SET_PT (buf, stop);
|
|
|
969 return Qnil;
|
|
|
970 }
|
|
|
971 from = newfrom;
|
|
|
972
|
|
|
973 /* We have skipped one comment. */
|
|
|
974 break;
|
|
|
975 }
|
|
|
976 else if (code != Swhitespace
|
|
|
977 && code != Sendcomment
|
|
|
978 && code != Scomment )
|
|
|
979 {
|
|
|
980 BUF_SET_PT (buf, from);
|
|
|
981 return Qnil;
|
|
|
982 }
|
|
|
983 from++;
|
|
|
984 }
|
|
|
985
|
|
|
986 /* End of comment reached */
|
|
444
|
987 n--;
|
|
428
|
988 }
|
|
|
989
|
|
444
|
990 while (n < 0)
|
|
428
|
991 {
|
|
|
992 QUIT;
|
|
|
993
|
|
|
994 stop = BUF_BEGV (buf);
|
|
|
995 while (from > stop)
|
|
|
996 {
|
|
460
|
997 int comstyle = 0; /* mask for finding matching comment style */
|
|
428
|
998
|
|
|
999 from--;
|
|
|
1000 if (char_quoted (buf, from))
|
|
|
1001 {
|
|
|
1002 from--;
|
|
|
1003 continue;
|
|
|
1004 }
|
|
|
1005
|
|
|
1006 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
1007 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
1008 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
1009
|
|
|
1010 if (code == Sendcomment)
|
|
|
1011 {
|
|
|
1012 /* we have found a single char end comment. we must record
|
|
|
1013 the comment style encountered so that later, we can match
|
|
|
1014 only the proper comment begin sequence of the same style */
|
|
460
|
1015 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode)
|
|
|
1016 == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
|
1017 }
|
|
|
1018
|
|
|
1019 else if (code == Scomment_fence)
|
|
|
1020 {
|
|
|
1021 code = Sendcomment;
|
|
|
1022 comstyle = ST_COMMENT_STYLE;
|
|
428
|
1023 }
|
|
|
1024
|
|
|
1025 else if (from > stop
|
|
460
|
1026 && SYNTAX_CODE_END_SECOND_P (syncode))
|
|
428
|
1027 {
|
|
460
|
1028 int prev_syncode;
|
|
|
1029 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
|
1030 prev_syncode =
|
|
|
1031 SYNTAX_CODE_FROM_CACHE (mirrortab,
|
|
|
1032 BUF_FETCH_CHAR (buf, from - 1));
|
|
|
1033 if (SYNTAX_CODES_END_P (prev_syncode, syncode))
|
|
|
1034 {
|
|
|
1035 /* We must record the comment style encountered so that
|
|
|
1036 later, we can match only the proper comment begin
|
|
|
1037 sequence of the same style. */
|
|
|
1038 code = Sendcomment;
|
|
|
1039 comstyle = SYNTAX_CODES_COMMENT_MASK_END
|
|
|
1040 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
|
1041 from--;
|
|
|
1042 }
|
|
428
|
1043 }
|
|
|
1044
|
|
|
1045 if (code == Sendcomment)
|
|
|
1046 {
|
|
460
|
1047 from = find_start_of_comment (buf, from, stop, comstyle);
|
|
428
|
1048 break;
|
|
|
1049 }
|
|
|
1050
|
|
|
1051 else if (code != Swhitespace
|
|
460
|
1052 && code != Scomment
|
|
|
1053 && code != Sendcomment)
|
|
428
|
1054 {
|
|
|
1055 BUF_SET_PT (buf, from + 1);
|
|
|
1056 return Qnil;
|
|
|
1057 }
|
|
|
1058 }
|
|
|
1059
|
|
444
|
1060 n++;
|
|
428
|
1061 }
|
|
|
1062
|
|
|
1063 BUF_SET_PT (buf, from);
|
|
|
1064 return Qt;
|
|
|
1065 }
|
|
|
1066
|
|
|
1067
|
|
|
1068 Lisp_Object
|
|
665
|
1069 scan_lists (struct buffer *buf, Charbpos from, int count, int depth,
|
|
444
|
1070 int sexpflag, int noerror)
|
|
428
|
1071 {
|
|
665
|
1072 Charbpos stop;
|
|
428
|
1073 Emchar c;
|
|
|
1074 int quoted;
|
|
|
1075 int mathexit = 0;
|
|
|
1076 enum syntaxcode code;
|
|
460
|
1077 int syncode;
|
|
428
|
1078 int min_depth = depth; /* Err out if depth gets less than this. */
|
|
|
1079
|
|
|
1080 if (depth > 0) min_depth = 0;
|
|
|
1081
|
|
460
|
1082 SETUP_SYNTAX_CACHE_FOR_BUFFER (buf, from, count);
|
|
428
|
1083 while (count > 0)
|
|
|
1084 {
|
|
|
1085 QUIT;
|
|
|
1086
|
|
|
1087 stop = BUF_ZV (buf);
|
|
|
1088 while (from < stop)
|
|
|
1089 {
|
|
460
|
1090 int comstyle = 0; /* mask for finding matching comment style */
|
|
428
|
1091
|
|
460
|
1092 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
1093 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
1094 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
1095 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
1096 from++;
|
|
|
1097
|
|
|
1098 /* a 1-char comment start sequence */
|
|
|
1099 if (code == Scomment && parse_sexp_ignore_comments)
|
|
|
1100 {
|
|
460
|
1101 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) ==
|
|
|
1102 SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
428
|
1103 }
|
|
|
1104
|
|
|
1105 /* else, a 2-char comment start sequence? */
|
|
|
1106 else if (from < stop
|
|
460
|
1107 && SYNTAX_CODE_START_FIRST_P (syncode)
|
|
428
|
1108 && parse_sexp_ignore_comments)
|
|
|
1109 {
|
|
460
|
1110 int next_syncode;
|
|
|
1111 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1112 next_syncode =
|
|
|
1113 SYNTAX_CODE_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from));
|
|
|
1114
|
|
|
1115 if (SYNTAX_CODES_START_P (syncode, next_syncode))
|
|
|
1116 {
|
|
428
|
1117 /* we have encountered a comment start sequence and we
|
|
|
1118 are ignoring all text inside comments. we must record
|
|
|
1119 the comment style this sequence begins so that later,
|
|
|
1120 only a comment end of the same style actually ends
|
|
|
1121 the comment section */
|
|
|
1122 code = Scomment;
|
|
460
|
1123 comstyle = SYNTAX_CODES_COMMENT_MASK_START
|
|
|
1124 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
428
|
1125 from++;
|
|
|
1126 }
|
|
460
|
1127 }
|
|
|
1128 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
1129
|
|
460
|
1130 if (SYNTAX_CODE_PREFIX (syncode))
|
|
428
|
1131 continue;
|
|
|
1132
|
|
|
1133 switch (code)
|
|
|
1134 {
|
|
|
1135 case Sescape:
|
|
|
1136 case Scharquote:
|
|
|
1137 if (from == stop) goto lose;
|
|
|
1138 from++;
|
|
|
1139 /* treat following character as a word constituent */
|
|
|
1140 case Sword:
|
|
|
1141 case Ssymbol:
|
|
|
1142 if (depth || !sexpflag) break;
|
|
|
1143 /* This word counts as a sexp; return at end of it. */
|
|
|
1144 while (from < stop)
|
|
|
1145 {
|
|
460
|
1146 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1147 switch (SYNTAX_FROM_CACHE (mirrortab,
|
|
|
1148 BUF_FETCH_CHAR (buf, from)))
|
|
428
|
1149 {
|
|
|
1150 case Scharquote:
|
|
|
1151 case Sescape:
|
|
|
1152 from++;
|
|
|
1153 if (from == stop) goto lose;
|
|
|
1154 break;
|
|
|
1155 case Sword:
|
|
|
1156 case Ssymbol:
|
|
|
1157 case Squote:
|
|
|
1158 break;
|
|
|
1159 default:
|
|
|
1160 goto done;
|
|
|
1161 }
|
|
|
1162 from++;
|
|
|
1163 }
|
|
|
1164 goto done;
|
|
|
1165
|
|
460
|
1166 case Scomment_fence:
|
|
|
1167 comstyle = ST_COMMENT_STYLE;
|
|
428
|
1168 case Scomment:
|
|
|
1169 if (!parse_sexp_ignore_comments)
|
|
|
1170 break;
|
|
460
|
1171 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
1172 {
|
|
665
|
1173 Charbpos newfrom =
|
|
460
|
1174 find_end_of_comment (buf, from, stop, comstyle);
|
|
428
|
1175 if (newfrom < 0)
|
|
|
1176 {
|
|
|
1177 /* we stopped because from == stop in search forward */
|
|
|
1178 from = stop;
|
|
|
1179 if (depth == 0)
|
|
|
1180 goto done;
|
|
|
1181 goto lose;
|
|
|
1182 }
|
|
|
1183 from = newfrom;
|
|
|
1184 }
|
|
|
1185 break;
|
|
|
1186
|
|
|
1187 case Smath:
|
|
|
1188 if (!sexpflag)
|
|
|
1189 break;
|
|
|
1190 if (from != stop && c == BUF_FETCH_CHAR (buf, from))
|
|
|
1191 from++;
|
|
|
1192 if (mathexit)
|
|
|
1193 {
|
|
|
1194 mathexit = 0;
|
|
|
1195 goto close1;
|
|
|
1196 }
|
|
|
1197 mathexit = 1;
|
|
|
1198
|
|
|
1199 case Sopen:
|
|
|
1200 if (!++depth) goto done;
|
|
|
1201 break;
|
|
|
1202
|
|
|
1203 case Sclose:
|
|
|
1204 close1:
|
|
|
1205 if (!--depth) goto done;
|
|
|
1206 if (depth < min_depth)
|
|
|
1207 {
|
|
444
|
1208 if (noerror)
|
|
428
|
1209 return Qnil;
|
|
563
|
1210 signal_error (Qsyntax_error, "Containing expression ends prematurely", Qunbound);
|
|
428
|
1211 }
|
|
|
1212 break;
|
|
|
1213
|
|
460
|
1214 case Sstring_fence:
|
|
428
|
1215 case Sstring:
|
|
|
1216 {
|
|
460
|
1217 Emchar stringterm;
|
|
|
1218
|
|
|
1219 if (code != Sstring_fence)
|
|
|
1220 {
|
|
428
|
1221 /* XEmacs change: call syntax_match on character */
|
|
|
1222 Emchar ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
460
|
1223 Lisp_Object stermobj =
|
|
|
1224 syntax_match (syntax_cache.current_syntax_table, ch);
|
|
428
|
1225
|
|
|
1226 if (CHARP (stermobj))
|
|
|
1227 stringterm = XCHAR (stermobj);
|
|
|
1228 else
|
|
|
1229 stringterm = ch;
|
|
460
|
1230 }
|
|
|
1231 else
|
|
|
1232 stringterm = '\0'; /* avoid compiler warnings */
|
|
428
|
1233
|
|
|
1234 while (1)
|
|
|
1235 {
|
|
|
1236 if (from >= stop)
|
|
|
1237 goto lose;
|
|
460
|
1238 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1239 c = BUF_FETCH_CHAR (buf, from);
|
|
|
1240 if (code == Sstring
|
|
|
1241 ? c == stringterm
|
|
|
1242 : SYNTAX_FROM_CACHE (mirrortab, c) == Sstring_fence)
|
|
428
|
1243 break;
|
|
460
|
1244
|
|
|
1245 switch (SYNTAX_FROM_CACHE (mirrortab, c))
|
|
428
|
1246 {
|
|
|
1247 case Scharquote:
|
|
|
1248 case Sescape:
|
|
|
1249 from++;
|
|
|
1250 break;
|
|
|
1251 default:
|
|
|
1252 break;
|
|
|
1253 }
|
|
|
1254 from++;
|
|
|
1255 }
|
|
|
1256 from++;
|
|
|
1257 if (!depth && sexpflag) goto done;
|
|
|
1258 break;
|
|
|
1259 }
|
|
|
1260
|
|
|
1261 default:
|
|
|
1262 break;
|
|
|
1263 }
|
|
|
1264 }
|
|
|
1265
|
|
|
1266 /* Reached end of buffer. Error if within object,
|
|
|
1267 return nil if between */
|
|
|
1268 if (depth) goto lose;
|
|
|
1269
|
|
|
1270 return Qnil;
|
|
|
1271
|
|
|
1272 /* End of object reached */
|
|
|
1273 done:
|
|
|
1274 count--;
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 while (count < 0)
|
|
|
1278 {
|
|
|
1279 QUIT;
|
|
|
1280
|
|
|
1281 stop = BUF_BEGV (buf);
|
|
|
1282 while (from > stop)
|
|
|
1283 {
|
|
460
|
1284 int comstyle = 0; /* mask for finding matching comment style */
|
|
428
|
1285
|
|
|
1286 from--;
|
|
460
|
1287 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
428
|
1288 quoted = char_quoted (buf, from);
|
|
|
1289 if (quoted)
|
|
460
|
1290 {
|
|
428
|
1291 from--;
|
|
460
|
1292 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
|
1293 }
|
|
428
|
1294
|
|
|
1295 c = BUF_FETCH_CHAR (buf, from);
|
|
460
|
1296 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
1297 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
1298
|
|
|
1299 if (code == Sendcomment && parse_sexp_ignore_comments)
|
|
|
1300 {
|
|
|
1301 /* we have found a single char end comment. we must record
|
|
|
1302 the comment style encountered so that later, we can match
|
|
|
1303 only the proper comment begin sequence of the same style */
|
|
460
|
1304 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode)
|
|
|
1305 == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
428
|
1306 }
|
|
|
1307
|
|
|
1308 else if (from > stop
|
|
460
|
1309 && SYNTAX_CODE_END_SECOND_P (syncode)
|
|
428
|
1310 && !char_quoted (buf, from - 1)
|
|
|
1311 && parse_sexp_ignore_comments)
|
|
|
1312 {
|
|
460
|
1313 int prev_syncode;
|
|
|
1314 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
|
1315 prev_syncode = SYNTAX_CODE_FROM_CACHE
|
|
|
1316 (mirrortab, BUF_FETCH_CHAR (buf, from - 1));
|
|
|
1317
|
|
|
1318 if (SYNTAX_CODES_END_P (prev_syncode, syncode))
|
|
|
1319 {
|
|
428
|
1320 /* we must record the comment style encountered so that
|
|
|
1321 later, we can match only the proper comment begin
|
|
|
1322 sequence of the same style */
|
|
|
1323 code = Sendcomment;
|
|
460
|
1324 comstyle = SYNTAX_CODES_COMMENT_MASK_END
|
|
|
1325 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
428
|
1326 from--;
|
|
|
1327 }
|
|
460
|
1328 }
|
|
428
|
1329
|
|
460
|
1330 if (SYNTAX_CODE_PREFIX (syncode))
|
|
428
|
1331 continue;
|
|
|
1332
|
|
434
|
1333 switch (quoted ? Sword : code)
|
|
428
|
1334 {
|
|
|
1335 case Sword:
|
|
|
1336 case Ssymbol:
|
|
|
1337 if (depth || !sexpflag) break;
|
|
|
1338 /* This word counts as a sexp; count object finished after
|
|
|
1339 passing it. */
|
|
|
1340 while (from > stop)
|
|
|
1341 {
|
|
460
|
1342 UPDATE_SYNTAX_CACHE_BACKWARD (from);
|
|
428
|
1343 quoted = char_quoted (buf, from - 1);
|
|
|
1344
|
|
|
1345 if (quoted)
|
|
|
1346 from--;
|
|
|
1347 if (! (quoted
|
|
|
1348 || (syncode =
|
|
460
|
1349 SYNTAX_FROM_CACHE (mirrortab,
|
|
|
1350 BUF_FETCH_CHAR (buf, from - 1)))
|
|
428
|
1351 == Sword
|
|
|
1352 || syncode == Ssymbol
|
|
|
1353 || syncode == Squote))
|
|
|
1354 goto done2;
|
|
|
1355 from--;
|
|
|
1356 }
|
|
|
1357 goto done2;
|
|
|
1358
|
|
|
1359 case Smath:
|
|
|
1360 if (!sexpflag)
|
|
|
1361 break;
|
|
|
1362 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1363 from--;
|
|
|
1364 if (mathexit)
|
|
|
1365 {
|
|
|
1366 mathexit = 0;
|
|
|
1367 goto open2;
|
|
|
1368 }
|
|
|
1369 mathexit = 1;
|
|
|
1370
|
|
|
1371 case Sclose:
|
|
|
1372 if (!++depth) goto done2;
|
|
|
1373 break;
|
|
|
1374
|
|
|
1375 case Sopen:
|
|
|
1376 open2:
|
|
|
1377 if (!--depth) goto done2;
|
|
|
1378 if (depth < min_depth)
|
|
|
1379 {
|
|
444
|
1380 if (noerror)
|
|
428
|
1381 return Qnil;
|
|
563
|
1382 signal_error (Qsyntax_error, "Containing expression ends prematurely", Qunbound);
|
|
428
|
1383 }
|
|
|
1384 break;
|
|
|
1385
|
|
460
|
1386 case Scomment_fence:
|
|
|
1387 comstyle = ST_COMMENT_STYLE;
|
|
428
|
1388 case Sendcomment:
|
|
|
1389 if (parse_sexp_ignore_comments)
|
|
460
|
1390 from = find_start_of_comment (buf, from, stop, comstyle);
|
|
428
|
1391 break;
|
|
|
1392
|
|
460
|
1393 case Sstring_fence:
|
|
428
|
1394 case Sstring:
|
|
|
1395 {
|
|
460
|
1396 Emchar stringterm;
|
|
|
1397
|
|
|
1398 if (code != Sstring_fence)
|
|
|
1399 {
|
|
428
|
1400 /* XEmacs change: call syntax_match() on character */
|
|
|
1401 Emchar ch = BUF_FETCH_CHAR (buf, from);
|
|
460
|
1402 Lisp_Object stermobj =
|
|
|
1403 syntax_match (syntax_cache.current_syntax_table, ch);
|
|
428
|
1404
|
|
|
1405 if (CHARP (stermobj))
|
|
|
1406 stringterm = XCHAR (stermobj);
|
|
|
1407 else
|
|
|
1408 stringterm = ch;
|
|
460
|
1409 }
|
|
|
1410 else
|
|
|
1411 stringterm = '\0'; /* avoid compiler warnings */
|
|
428
|
1412
|
|
|
1413 while (1)
|
|
|
1414 {
|
|
|
1415 if (from == stop) goto lose;
|
|
460
|
1416
|
|
|
1417 UPDATE_SYNTAX_CACHE_BACKWARD (from - 1);
|
|
|
1418 c = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
1419
|
|
|
1420 if ((code == Sstring
|
|
|
1421 ? c == stringterm
|
|
|
1422 : SYNTAX_FROM_CACHE (mirrortab, c) == Sstring_fence)
|
|
|
1423 && !char_quoted (buf, from - 1))
|
|
|
1424 {
|
|
428
|
1425 break;
|
|
460
|
1426 }
|
|
|
1427
|
|
428
|
1428 from--;
|
|
|
1429 }
|
|
|
1430 from--;
|
|
|
1431 if (!depth && sexpflag) goto done2;
|
|
|
1432 break;
|
|
|
1433 }
|
|
|
1434 }
|
|
|
1435 }
|
|
|
1436
|
|
|
1437 /* Reached start of buffer. Error if within object,
|
|
|
1438 return nil if between */
|
|
|
1439 if (depth) goto lose;
|
|
|
1440
|
|
|
1441 return Qnil;
|
|
|
1442
|
|
|
1443 done2:
|
|
|
1444 count++;
|
|
|
1445 }
|
|
|
1446
|
|
|
1447
|
|
|
1448 return (make_int (from));
|
|
|
1449
|
|
|
1450 lose:
|
|
444
|
1451 if (!noerror)
|
|
563
|
1452 signal_error (Qsyntax_error, "Unbalanced parentheses", Qunbound);
|
|
428
|
1453 return Qnil;
|
|
|
1454 }
|
|
|
1455
|
|
|
1456 int
|
|
665
|
1457 char_quoted (struct buffer *buf, Charbpos pos)
|
|
428
|
1458 {
|
|
|
1459 enum syntaxcode code;
|
|
665
|
1460 Charbpos beg = BUF_BEGV (buf);
|
|
428
|
1461 int quoted = 0;
|
|
665
|
1462 Charbpos startpos = pos;
|
|
460
|
1463
|
|
|
1464 while (pos > beg)
|
|
|
1465 {
|
|
|
1466 UPDATE_SYNTAX_CACHE_BACKWARD (pos - 1);
|
|
|
1467 code = SYNTAX_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, pos - 1));
|
|
428
|
1468
|
|
460
|
1469 if (code != Scharquote && code != Sescape)
|
|
|
1470 break;
|
|
|
1471 pos--;
|
|
|
1472 quoted = !quoted;
|
|
|
1473 }
|
|
|
1474
|
|
|
1475 UPDATE_SYNTAX_CACHE (startpos);
|
|
428
|
1476 return quoted;
|
|
|
1477 }
|
|
|
1478
|
|
|
1479 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /*
|
|
|
1480 Scan from character number FROM by COUNT lists.
|
|
|
1481 Returns the character number of the position thus found.
|
|
|
1482
|
|
|
1483 If DEPTH is nonzero, paren depth begins counting from that value,
|
|
|
1484 only places where the depth in parentheses becomes zero
|
|
|
1485 are candidates for stopping; COUNT such places are counted.
|
|
|
1486 Thus, a positive value for DEPTH means go out levels.
|
|
|
1487
|
|
|
1488 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1489
|
|
|
1490 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1491 and the depth is wrong, an error is signaled.
|
|
|
1492 If the depth is right but the count is not used up, nil is returned.
|
|
|
1493
|
|
|
1494 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1495 of in the current buffer.
|
|
|
1496
|
|
|
1497 If optional arg NOERROR is non-nil, scan-lists will return nil instead of
|
|
|
1498 signalling an error.
|
|
|
1499 */
|
|
444
|
1500 (from, count, depth, buffer, noerror))
|
|
428
|
1501 {
|
|
|
1502 struct buffer *buf;
|
|
|
1503
|
|
|
1504 CHECK_INT (from);
|
|
|
1505 CHECK_INT (count);
|
|
|
1506 CHECK_INT (depth);
|
|
|
1507 buf = decode_buffer (buffer, 0);
|
|
|
1508
|
|
|
1509 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0,
|
|
444
|
1510 !NILP (noerror));
|
|
428
|
1511 }
|
|
|
1512
|
|
|
1513 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /*
|
|
|
1514 Scan from character number FROM by COUNT balanced expressions.
|
|
|
1515 If COUNT is negative, scan backwards.
|
|
|
1516 Returns the character number of the position thus found.
|
|
|
1517
|
|
|
1518 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1519
|
|
|
1520 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1521 in the middle of a parenthetical grouping, an error is signaled.
|
|
|
1522 If the beginning or end is reached between groupings
|
|
|
1523 but before count is used up, nil is returned.
|
|
|
1524
|
|
|
1525 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1526 of in the current buffer.
|
|
|
1527
|
|
|
1528 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of
|
|
|
1529 signalling an error.
|
|
|
1530 */
|
|
444
|
1531 (from, count, buffer, noerror))
|
|
428
|
1532 {
|
|
|
1533 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1534 CHECK_INT (from);
|
|
|
1535 CHECK_INT (count);
|
|
|
1536
|
|
444
|
1537 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (noerror));
|
|
428
|
1538 }
|
|
|
1539
|
|
|
1540 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /*
|
|
|
1541 Move point backward over any number of chars with prefix syntax.
|
|
|
1542 This includes chars with "quote" or "prefix" syntax (' or p).
|
|
|
1543
|
|
|
1544 Optional arg BUFFER defaults to the current buffer.
|
|
|
1545 */
|
|
|
1546 (buffer))
|
|
|
1547 {
|
|
|
1548 struct buffer *buf = decode_buffer (buffer, 0);
|
|
665
|
1549 Charbpos beg = BUF_BEGV (buf);
|
|
|
1550 Charbpos pos = BUF_PT (buf);
|
|
460
|
1551 #ifndef emacs
|
|
440
|
1552 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
460
|
1553 #endif
|
|
|
1554 Emchar c = '\0'; /* initialize to avoid compiler warnings */
|
|
|
1555
|
|
|
1556
|
|
|
1557 SETUP_SYNTAX_CACHE_FOR_BUFFER (buf, pos, -1);
|
|
428
|
1558
|
|
|
1559 while (pos > beg && !char_quoted (buf, pos - 1)
|
|
460
|
1560 /* Previous statement updates syntax table. */
|
|
|
1561 && (SYNTAX_FROM_CACHE (mirrortab, c = BUF_FETCH_CHAR (buf, pos - 1)) == Squote
|
|
|
1562 || SYNTAX_CODE_PREFIX (SYNTAX_CODE_FROM_CACHE (mirrortab, c))))
|
|
428
|
1563 pos--;
|
|
|
1564
|
|
|
1565 BUF_SET_PT (buf, pos);
|
|
|
1566
|
|
|
1567 return Qnil;
|
|
|
1568 }
|
|
|
1569
|
|
|
1570 /* Parse forward from FROM to END,
|
|
|
1571 assuming that FROM has state OLDSTATE (nil means FROM is start of function),
|
|
|
1572 and return a description of the state of the parse at END.
|
|
|
1573 If STOPBEFORE is nonzero, stop at the start of an atom.
|
|
|
1574 If COMMENTSTOP is nonzero, stop at the start of a comment. */
|
|
|
1575
|
|
|
1576 static void
|
|
|
1577 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr,
|
|
665
|
1578 Charbpos from, Charbpos end,
|
|
428
|
1579 int targetdepth, int stopbefore,
|
|
|
1580 Lisp_Object oldstate,
|
|
|
1581 int commentstop)
|
|
|
1582 {
|
|
|
1583 struct lisp_parse_state state;
|
|
|
1584
|
|
|
1585 enum syntaxcode code;
|
|
|
1586 struct level { int last, prev; };
|
|
|
1587 struct level levelstart[100];
|
|
|
1588 struct level *curlevel = levelstart;
|
|
|
1589 struct level *endlevel = levelstart + 100;
|
|
|
1590 int depth; /* Paren depth of current scanning location.
|
|
|
1591 level - levelstart equals this except
|
|
|
1592 when the depth becomes negative. */
|
|
|
1593 int mindepth; /* Lowest DEPTH value seen. */
|
|
|
1594 int start_quoted = 0; /* Nonzero means starting after a char quote */
|
|
460
|
1595 int boundary_stop = commentstop == -1;
|
|
428
|
1596 Lisp_Object tem;
|
|
|
1597
|
|
460
|
1598 SETUP_SYNTAX_CACHE (from, 1);
|
|
428
|
1599 if (NILP (oldstate))
|
|
|
1600 {
|
|
|
1601 depth = 0;
|
|
|
1602 state.instring = -1;
|
|
|
1603 state.incomment = 0;
|
|
|
1604 state.comstyle = 0; /* comment style a by default */
|
|
460
|
1605 state.comstr_start = -1; /* no comment/string seen. */
|
|
428
|
1606 }
|
|
|
1607 else
|
|
|
1608 {
|
|
|
1609 tem = Fcar (oldstate); /* elt 0, depth */
|
|
|
1610 if (!NILP (tem))
|
|
|
1611 depth = XINT (tem);
|
|
|
1612 else
|
|
|
1613 depth = 0;
|
|
|
1614
|
|
|
1615 oldstate = Fcdr (oldstate);
|
|
|
1616 oldstate = Fcdr (oldstate);
|
|
|
1617 oldstate = Fcdr (oldstate);
|
|
|
1618 tem = Fcar (oldstate); /* elt 3, instring */
|
|
460
|
1619 state.instring = ( !NILP (tem)
|
|
|
1620 ? ( INTP (tem) ? XINT (tem) : ST_STRING_STYLE)
|
|
|
1621 : -1);
|
|
428
|
1622
|
|
460
|
1623 oldstate = Fcdr (oldstate);
|
|
|
1624 tem = Fcar (oldstate); /* elt 4, incomment */
|
|
428
|
1625 state.incomment = !NILP (tem);
|
|
|
1626
|
|
|
1627 oldstate = Fcdr (oldstate);
|
|
|
1628 tem = Fcar (oldstate); /* elt 5, follows-quote */
|
|
|
1629 start_quoted = !NILP (tem);
|
|
|
1630
|
|
|
1631 /* if the eighth element of the list is nil, we are in comment style
|
|
460
|
1632 a; if it is t, we are in comment style b; if it is 'syntax-table,
|
|
|
1633 we are in a generic comment */
|
|
428
|
1634 oldstate = Fcdr (oldstate);
|
|
|
1635 oldstate = Fcdr (oldstate);
|
|
460
|
1636 tem = Fcar (oldstate); /* elt 7, comment style a/b/fence */
|
|
|
1637 state.comstyle = NILP (tem) ? 0 : ( EQ (tem, Qsyntax_table)
|
|
|
1638 ? ST_COMMENT_STYLE : 1 );
|
|
|
1639
|
|
|
1640 oldstate = Fcdr (oldstate); /* elt 8, start of last comment/string */
|
|
|
1641 tem = Fcar (oldstate);
|
|
|
1642 state.comstr_start = NILP (tem) ? -1 : XINT (tem);
|
|
|
1643
|
|
|
1644 /* elt 9, char numbers of starts-of-expression of levels
|
|
|
1645 (starting from outermost). */
|
|
|
1646 oldstate = Fcdr (oldstate);
|
|
|
1647 tem = Fcar (oldstate); /* elt 9, intermediate data for
|
|
|
1648 continuation of parsing (subject
|
|
|
1649 to change). */
|
|
|
1650 while (!NILP (tem)) /* >= second enclosing sexps. */
|
|
|
1651 {
|
|
|
1652 curlevel->last = XINT (Fcar (tem));
|
|
|
1653 if (++curlevel == endlevel)
|
|
563
|
1654 signal_error (Qstack_overflow, "Nesting too deep for parser", Qunbound);
|
|
460
|
1655 curlevel->prev = -1;
|
|
|
1656 curlevel->last = -1;
|
|
|
1657 tem = Fcdr (tem);
|
|
|
1658 }
|
|
428
|
1659 }
|
|
|
1660 state.quoted = 0;
|
|
|
1661 mindepth = depth;
|
|
|
1662
|
|
|
1663 curlevel->prev = -1;
|
|
|
1664 curlevel->last = -1;
|
|
|
1665
|
|
|
1666 /* Enter the loop at a place appropriate for initial state. */
|
|
|
1667
|
|
|
1668 if (state.incomment) goto startincomment;
|
|
|
1669 if (state.instring >= 0)
|
|
|
1670 {
|
|
|
1671 if (start_quoted) goto startquotedinstring;
|
|
|
1672 goto startinstring;
|
|
|
1673 }
|
|
|
1674 if (start_quoted) goto startquoted;
|
|
|
1675
|
|
|
1676 while (from < end)
|
|
|
1677 {
|
|
460
|
1678 Emchar c;
|
|
|
1679 int syncode;
|
|
|
1680
|
|
428
|
1681 QUIT;
|
|
|
1682
|
|
460
|
1683 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1684 c = BUF_FETCH_CHAR (buf, from);
|
|
|
1685 code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
1686 syncode = SYNTAX_CODE_FROM_CACHE (mirrortab, c);
|
|
428
|
1687 from++;
|
|
|
1688
|
|
|
1689 /* record the comment style we have entered so that only the
|
|
|
1690 comment-ender sequence (or single char) of the same style
|
|
|
1691 actually terminates the comment section. */
|
|
460
|
1692 if (code == Scomment)
|
|
|
1693 {
|
|
|
1694 state.comstyle =
|
|
|
1695 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode)
|
|
|
1696 == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
|
1697 state.comstr_start = from - 1;
|
|
|
1698 }
|
|
|
1699
|
|
|
1700 /* a generic comment delimiter? */
|
|
|
1701 else if (code == Scomment_fence)
|
|
|
1702 {
|
|
|
1703 state.comstyle = ST_COMMENT_STYLE;
|
|
|
1704 state.comstr_start = from - 1;
|
|
|
1705 code = Scomment;
|
|
428
|
1706 }
|
|
|
1707
|
|
|
1708 else if (from < end &&
|
|
460
|
1709 SYNTAX_CODE_START_FIRST_P (syncode))
|
|
428
|
1710 {
|
|
460
|
1711 int next_syncode;
|
|
|
1712 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1713 next_syncode =
|
|
|
1714 SYNTAX_CODE_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from));
|
|
|
1715
|
|
|
1716 if (SYNTAX_CODES_START_P (syncode, next_syncode))
|
|
|
1717 {
|
|
428
|
1718 code = Scomment;
|
|
460
|
1719 state.comstyle = SYNTAX_CODES_COMMENT_MASK_START
|
|
|
1720 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1;
|
|
|
1721 state.comstr_start = from - 1;
|
|
428
|
1722 from++;
|
|
460
|
1723 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1724 }
|
|
428
|
1725 }
|
|
|
1726
|
|
460
|
1727 if (SYNTAX_CODE_PREFIX (syncode))
|
|
428
|
1728 continue;
|
|
|
1729 switch (code)
|
|
|
1730 {
|
|
|
1731 case Sescape:
|
|
|
1732 case Scharquote:
|
|
|
1733 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1734 curlevel->last = from - 1;
|
|
|
1735 startquoted:
|
|
|
1736 if (from == end) goto endquoted;
|
|
|
1737 from++;
|
|
|
1738 goto symstarted;
|
|
|
1739 /* treat following character as a word constituent */
|
|
|
1740 case Sword:
|
|
|
1741 case Ssymbol:
|
|
|
1742 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1743 curlevel->last = from - 1;
|
|
|
1744 symstarted:
|
|
|
1745 while (from < end)
|
|
|
1746 {
|
|
460
|
1747 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1748 switch (SYNTAX_FROM_CACHE (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
428
|
1749 {
|
|
|
1750 case Scharquote:
|
|
|
1751 case Sescape:
|
|
|
1752 from++;
|
|
|
1753 if (from == end) goto endquoted;
|
|
|
1754 break;
|
|
|
1755 case Sword:
|
|
|
1756 case Ssymbol:
|
|
|
1757 case Squote:
|
|
|
1758 break;
|
|
|
1759 default:
|
|
|
1760 goto symdone;
|
|
|
1761 }
|
|
|
1762 from++;
|
|
|
1763 }
|
|
|
1764 symdone:
|
|
|
1765 curlevel->prev = curlevel->last;
|
|
|
1766 break;
|
|
|
1767
|
|
|
1768 case Scomment:
|
|
|
1769 state.incomment = 1;
|
|
460
|
1770 if (commentstop || boundary_stop) goto done;
|
|
428
|
1771 startincomment:
|
|
460
|
1772 if (commentstop == 1)
|
|
428
|
1773 goto done;
|
|
460
|
1774 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
428
|
1775 {
|
|
665
|
1776 Charbpos newfrom = find_end_of_comment (buf, from, end, state.comstyle);
|
|
428
|
1777 if (newfrom < 0)
|
|
|
1778 {
|
|
|
1779 /* we terminated search because from == end */
|
|
|
1780 from = end;
|
|
|
1781 goto done;
|
|
|
1782 }
|
|
|
1783 from = newfrom;
|
|
|
1784 }
|
|
|
1785 state.incomment = 0;
|
|
|
1786 state.comstyle = 0; /* reset the comment style */
|
|
460
|
1787 if (boundary_stop) goto done;
|
|
428
|
1788 break;
|
|
|
1789
|
|
|
1790 case Sopen:
|
|
|
1791 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1792 depth++;
|
|
|
1793 /* curlevel++->last ran into compiler bug on Apollo */
|
|
|
1794 curlevel->last = from - 1;
|
|
|
1795 if (++curlevel == endlevel)
|
|
563
|
1796 signal_error (Qstack_overflow, "Nesting too deep for parser", Qunbound);
|
|
428
|
1797 curlevel->prev = -1;
|
|
|
1798 curlevel->last = -1;
|
|
|
1799 if (targetdepth == depth) goto done;
|
|
|
1800 break;
|
|
|
1801
|
|
|
1802 case Sclose:
|
|
|
1803 depth--;
|
|
|
1804 if (depth < mindepth)
|
|
|
1805 mindepth = depth;
|
|
|
1806 if (curlevel != levelstart)
|
|
|
1807 curlevel--;
|
|
|
1808 curlevel->prev = curlevel->last;
|
|
|
1809 if (targetdepth == depth) goto done;
|
|
|
1810 break;
|
|
|
1811
|
|
|
1812 case Sstring:
|
|
460
|
1813 case Sstring_fence:
|
|
|
1814 state.comstr_start = from - 1;
|
|
428
|
1815 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1816 curlevel->last = from - 1;
|
|
460
|
1817 if (code == Sstring_fence)
|
|
428
|
1818 {
|
|
460
|
1819 state.instring = ST_STRING_STYLE;
|
|
|
1820 }
|
|
|
1821 else
|
|
|
1822 {
|
|
|
1823 /* XEmacs change: call syntax_match() on character */
|
|
|
1824 Emchar ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
1825 Lisp_Object stermobj =
|
|
|
1826 syntax_match (syntax_cache.current_syntax_table, ch);
|
|
428
|
1827
|
|
|
1828 if (CHARP (stermobj))
|
|
|
1829 state.instring = XCHAR (stermobj);
|
|
|
1830 else
|
|
|
1831 state.instring = ch;
|
|
|
1832 }
|
|
460
|
1833 if (boundary_stop) goto done;
|
|
428
|
1834 startinstring:
|
|
|
1835 while (1)
|
|
|
1836 {
|
|
460
|
1837 enum syntaxcode temp_code;
|
|
|
1838
|
|
428
|
1839 if (from >= end) goto done;
|
|
460
|
1840
|
|
|
1841 UPDATE_SYNTAX_CACHE_FORWARD (from);
|
|
|
1842 c = BUF_FETCH_CHAR (buf, from);
|
|
|
1843 temp_code = SYNTAX_FROM_CACHE (mirrortab, c);
|
|
|
1844
|
|
|
1845 if (
|
|
|
1846 state.instring != ST_STRING_STYLE &&
|
|
|
1847 temp_code == Sstring &&
|
|
|
1848 c == state.instring) break;
|
|
|
1849
|
|
|
1850 switch (temp_code)
|
|
428
|
1851 {
|
|
460
|
1852 case Sstring_fence:
|
|
|
1853 if (state.instring == ST_STRING_STYLE)
|
|
|
1854 goto string_end;
|
|
|
1855 break;
|
|
428
|
1856 case Scharquote:
|
|
|
1857 case Sescape:
|
|
|
1858 {
|
|
|
1859 from++;
|
|
|
1860 startquotedinstring:
|
|
|
1861 if (from >= end) goto endquoted;
|
|
|
1862 break;
|
|
|
1863 }
|
|
|
1864 default:
|
|
|
1865 break;
|
|
|
1866 }
|
|
|
1867 from++;
|
|
|
1868 }
|
|
460
|
1869 string_end:
|
|
428
|
1870 state.instring = -1;
|
|
|
1871 curlevel->prev = curlevel->last;
|
|
|
1872 from++;
|
|
460
|
1873 if (boundary_stop) goto done;
|
|
428
|
1874 break;
|
|
|
1875
|
|
|
1876 case Smath:
|
|
|
1877 break;
|
|
|
1878
|
|
|
1879 case Swhitespace:
|
|
|
1880 case Spunct:
|
|
|
1881 case Squote:
|
|
|
1882 case Sendcomment:
|
|
460
|
1883 case Scomment_fence:
|
|
428
|
1884 case Sinherit:
|
|
|
1885 case Smax:
|
|
|
1886 break;
|
|
|
1887 }
|
|
|
1888 }
|
|
|
1889 goto done;
|
|
|
1890
|
|
|
1891 stop: /* Here if stopping before start of sexp. */
|
|
|
1892 from--; /* We have just fetched the char that starts it; */
|
|
|
1893 goto done; /* but return the position before it. */
|
|
|
1894
|
|
|
1895 endquoted:
|
|
|
1896 state.quoted = 1;
|
|
|
1897 done:
|
|
|
1898 state.depth = depth;
|
|
|
1899 state.mindepth = mindepth;
|
|
|
1900 state.thislevelstart = curlevel->prev;
|
|
|
1901 state.prevlevelstart
|
|
|
1902 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last;
|
|
|
1903 state.location = from;
|
|
460
|
1904 state.levelstarts = Qnil;
|
|
|
1905 while (--curlevel >= levelstart)
|
|
|
1906 state.levelstarts = Fcons (make_int (curlevel->last),
|
|
|
1907 state.levelstarts);
|
|
428
|
1908
|
|
|
1909 *stateptr = state;
|
|
|
1910 }
|
|
|
1911
|
|
|
1912 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /*
|
|
|
1913 Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
|
|
|
1914 Parsing stops at TO or when certain criteria are met;
|
|
|
1915 point is set to where parsing stops.
|
|
444
|
1916 If fifth arg OLDSTATE is omitted or nil,
|
|
428
|
1917 parsing assumes that FROM is the beginning of a function.
|
|
460
|
1918 Value is a list of nine elements describing final state of parsing:
|
|
428
|
1919 0. depth in parens.
|
|
|
1920 1. character address of start of innermost containing list; nil if none.
|
|
|
1921 2. character address of start of last complete sexp terminated.
|
|
|
1922 3. non-nil if inside a string.
|
|
460
|
1923 (It is the character that will terminate the string,
|
|
|
1924 or t if the string should be terminated by an explicit
|
|
|
1925 `syntax-table' property.)
|
|
428
|
1926 4. t if inside a comment.
|
|
|
1927 5. t if following a quote character.
|
|
|
1928 6. the minimum paren-depth encountered during this scan.
|
|
460
|
1929 7. nil if in comment style a, or not in a comment; t if in comment style b;
|
|
|
1930 `syntax-table' if given by an explicit `syntax-table' property.
|
|
|
1931 8. character address of start of last comment or string; nil if none.
|
|
|
1932 9. Intermediate data for continuation of parsing (subject to change).
|
|
428
|
1933 If third arg TARGETDEPTH is non-nil, parsing stops if the depth
|
|
|
1934 in parentheses becomes equal to TARGETDEPTH.
|
|
|
1935 Fourth arg STOPBEFORE non-nil means stop when come to
|
|
|
1936 any character that starts a sexp.
|
|
460
|
1937 Fifth arg OLDSTATE is a nine-element list like what this function returns.
|
|
428
|
1938 It is used to initialize the state of the parse. Its second and third
|
|
|
1939 elements are ignored.
|
|
460
|
1940 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. If it
|
|
|
1941 is `syntax-table', stop after the start of a comment or a string, or after
|
|
|
1942 the end of a comment or string.
|
|
428
|
1943 */
|
|
|
1944 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer))
|
|
|
1945 {
|
|
|
1946 struct lisp_parse_state state;
|
|
|
1947 int target;
|
|
665
|
1948 Charbpos start, end;
|
|
428
|
1949 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1950 Lisp_Object val;
|
|
|
1951
|
|
|
1952 if (!NILP (targetdepth))
|
|
|
1953 {
|
|
|
1954 CHECK_INT (targetdepth);
|
|
|
1955 target = XINT (targetdepth);
|
|
|
1956 }
|
|
|
1957 else
|
|
|
1958 target = -100000; /* We won't reach this depth */
|
|
|
1959
|
|
|
1960 get_buffer_range_char (buf, from, to, &start, &end, 0);
|
|
|
1961 scan_sexps_forward (buf, &state, start, end,
|
|
|
1962 target, !NILP (stopbefore), oldstate,
|
|
460
|
1963 (NILP (commentstop)
|
|
|
1964 ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1)));
|
|
428
|
1965 BUF_SET_PT (buf, state.location);
|
|
|
1966
|
|
|
1967 /* reverse order */
|
|
|
1968 val = Qnil;
|
|
460
|
1969 val = Fcons (state.levelstarts, val);
|
|
|
1970 val = Fcons ((state.incomment || (state.instring >= 0))
|
|
|
1971 ? make_int (state.comstr_start) : Qnil, val);
|
|
|
1972 val = Fcons (state.comstyle ? (state.comstyle == ST_COMMENT_STYLE
|
|
|
1973 ? Qsyntax_table : Qt) : Qnil, val);
|
|
428
|
1974 val = Fcons (make_int (state.mindepth), val);
|
|
|
1975 val = Fcons (state.quoted ? Qt : Qnil, val);
|
|
|
1976 val = Fcons (state.incomment ? Qt : Qnil, val);
|
|
460
|
1977 val = Fcons (state.instring < 0
|
|
|
1978 ? Qnil
|
|
|
1979 : (state.instring == ST_STRING_STYLE
|
|
|
1980 ? Qt : make_int (state.instring)), val);
|
|
428
|
1981 val = Fcons (state.thislevelstart < 0 ? Qnil : make_int (state.thislevelstart), val);
|
|
|
1982 val = Fcons (state.prevlevelstart < 0 ? Qnil : make_int (state.prevlevelstart), val);
|
|
|
1983 val = Fcons (make_int (state.depth), val);
|
|
|
1984
|
|
|
1985 return val;
|
|
|
1986 }
|
|
|
1987
|
|
|
1988
|
|
|
1989 /* Updating of the mirror syntax table.
|
|
|
1990
|
|
|
1991 Each syntax table has a corresponding mirror table in it.
|
|
|
1992 Whenever we make a change to a syntax table, we call
|
|
|
1993 update_syntax_table() on it.
|
|
|
1994
|
|
|
1995 #### We really only need to map over the changed range.
|
|
|
1996
|
|
|
1997 If we change the standard syntax table, we need to map over
|
|
|
1998 all tables because any of them could be inheriting from the
|
|
|
1999 standard syntax table.
|
|
|
2000
|
|
|
2001 When `set-syntax-table' is called, we set the buffer's mirror
|
|
|
2002 syntax table as well.
|
|
|
2003 */
|
|
|
2004
|
|
|
2005 struct cmst_arg
|
|
|
2006 {
|
|
|
2007 Lisp_Object mirrortab;
|
|
|
2008 int check_inherit;
|
|
|
2009 };
|
|
|
2010
|
|
|
2011 static int
|
|
|
2012 cmst_mapfun (struct chartab_range *range, Lisp_Object val, void *arg)
|
|
|
2013 {
|
|
|
2014 struct cmst_arg *closure = (struct cmst_arg *) arg;
|
|
|
2015
|
|
|
2016 if (CONSP (val))
|
|
|
2017 val = XCAR (val);
|
|
|
2018 if (SYNTAX_FROM_CODE (XINT (val)) == Sinherit
|
|
|
2019 && closure->check_inherit)
|
|
|
2020 {
|
|
|
2021 struct cmst_arg recursive;
|
|
|
2022
|
|
|
2023 recursive.mirrortab = closure->mirrortab;
|
|
|
2024 recursive.check_inherit = 0;
|
|
|
2025 map_char_table (XCHAR_TABLE (Vstandard_syntax_table), range,
|
|
|
2026 cmst_mapfun, &recursive);
|
|
|
2027 }
|
|
|
2028 else
|
|
|
2029 put_char_table (XCHAR_TABLE (closure->mirrortab), range, val);
|
|
|
2030 return 0;
|
|
|
2031 }
|
|
|
2032
|
|
|
2033 static void
|
|
440
|
2034 update_just_this_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
2035 {
|
|
|
2036 struct chartab_range range;
|
|
|
2037 struct cmst_arg arg;
|
|
|
2038
|
|
|
2039 arg.mirrortab = ct->mirror_table;
|
|
|
2040 arg.check_inherit = (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
2041 && ct != XCHAR_TABLE (Vstandard_syntax_table));
|
|
|
2042 range.type = CHARTAB_RANGE_ALL;
|
|
|
2043 map_char_table (ct, &range, cmst_mapfun, &arg);
|
|
|
2044 }
|
|
|
2045
|
|
|
2046 /* Called from chartab.c when a change is made to a syntax table.
|
|
|
2047 If this is the standard syntax table, we need to recompute
|
|
|
2048 *all* syntax tables (yuck). Otherwise we just recompute this
|
|
|
2049 one. */
|
|
|
2050
|
|
|
2051 void
|
|
440
|
2052 update_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
2053 {
|
|
|
2054 /* Don't be stymied at startup. */
|
|
|
2055 if (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
2056 && ct == XCHAR_TABLE (Vstandard_syntax_table))
|
|
|
2057 {
|
|
|
2058 Lisp_Object syntab;
|
|
|
2059
|
|
|
2060 for (syntab = Vall_syntax_tables; !NILP (syntab);
|
|
|
2061 syntab = XCHAR_TABLE (syntab)->next_table)
|
|
|
2062 update_just_this_syntax_table (XCHAR_TABLE (syntab));
|
|
|
2063 }
|
|
|
2064 else
|
|
|
2065 update_just_this_syntax_table (ct);
|
|
|
2066 }
|
|
|
2067
|
|
|
2068
|
|
|
2069 /************************************************************************/
|
|
|
2070 /* initialization */
|
|
|
2071 /************************************************************************/
|
|
|
2072
|
|
|
2073 void
|
|
|
2074 syms_of_syntax (void)
|
|
|
2075 {
|
|
563
|
2076 DEFSYMBOL (Qsyntax_table_p);
|
|
|
2077 DEFSYMBOL (Qsyntax_table);
|
|
428
|
2078
|
|
|
2079 DEFSUBR (Fsyntax_table_p);
|
|
|
2080 DEFSUBR (Fsyntax_table);
|
|
|
2081 DEFSUBR (Fstandard_syntax_table);
|
|
|
2082 DEFSUBR (Fcopy_syntax_table);
|
|
|
2083 DEFSUBR (Fset_syntax_table);
|
|
|
2084 DEFSUBR (Fsyntax_designator_chars);
|
|
|
2085 DEFSUBR (Fchar_syntax);
|
|
|
2086 DEFSUBR (Fmatching_paren);
|
|
|
2087 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */
|
|
|
2088 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */
|
|
|
2089
|
|
|
2090 DEFSUBR (Fforward_word);
|
|
|
2091
|
|
|
2092 DEFSUBR (Fforward_comment);
|
|
|
2093 DEFSUBR (Fscan_lists);
|
|
|
2094 DEFSUBR (Fscan_sexps);
|
|
|
2095 DEFSUBR (Fbackward_prefix_chars);
|
|
|
2096 DEFSUBR (Fparse_partial_sexp);
|
|
|
2097 }
|
|
|
2098
|
|
|
2099 void
|
|
|
2100 vars_of_syntax (void)
|
|
|
2101 {
|
|
|
2102 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /*
|
|
|
2103 Non-nil means `forward-sexp', etc., should treat comments as whitespace.
|
|
|
2104 */ );
|
|
434
|
2105 parse_sexp_ignore_comments = 0;
|
|
428
|
2106
|
|
460
|
2107 DEFVAR_BOOL ("lookup-syntax-properties", &lookup_syntax_properties /*
|
|
|
2108 Non-nil means `forward-sexp', etc., grant `syntax-table' property.
|
|
|
2109 The value of this property should be either a syntax table, or a cons
|
|
|
2110 of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric
|
|
|
2111 syntax code, MATCHCHAR being nil or the character to match (which is
|
|
|
2112 relevant only for open/close type.
|
|
|
2113 */ );
|
|
|
2114 lookup_syntax_properties = 1;
|
|
|
2115
|
|
428
|
2116 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /*
|
|
|
2117 Non-nil means `forward-word', etc., should treat escape chars part of words.
|
|
|
2118 */ );
|
|
434
|
2119 words_include_escapes = 0;
|
|
428
|
2120
|
|
|
2121 no_quit_in_re_search = 0;
|
|
|
2122 }
|
|
|
2123
|
|
|
2124 static void
|
|
442
|
2125 define_standard_syntax (const char *p, enum syntaxcode syn)
|
|
428
|
2126 {
|
|
|
2127 for (; *p; p++)
|
|
|
2128 Fput_char_table (make_char (*p), make_int (syn), Vstandard_syntax_table);
|
|
|
2129 }
|
|
|
2130
|
|
|
2131 void
|
|
|
2132 complex_vars_of_syntax (void)
|
|
|
2133 {
|
|
|
2134 Emchar i;
|
|
442
|
2135 const char *p;
|
|
428
|
2136 /* Set this now, so first buffer creation can refer to it. */
|
|
|
2137 /* Make it nil before calling copy-syntax-table
|
|
|
2138 so that copy-syntax-table will know not to try to copy from garbage */
|
|
|
2139 Vstandard_syntax_table = Qnil;
|
|
|
2140 Vstandard_syntax_table = Fcopy_syntax_table (Qnil);
|
|
|
2141 staticpro (&Vstandard_syntax_table);
|
|
|
2142
|
|
|
2143 Vsyntax_designator_chars_string = make_string_nocopy (syntax_code_spec,
|
|
|
2144 Smax);
|
|
|
2145 staticpro (&Vsyntax_designator_chars_string);
|
|
|
2146
|
|
|
2147 fill_char_table (XCHAR_TABLE (Vstandard_syntax_table), make_int (Spunct));
|
|
|
2148
|
|
|
2149 for (i = 0; i <= 32; i++) /* Control 0 plus SPACE */
|
|
|
2150 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
2151 Vstandard_syntax_table);
|
|
|
2152 for (i = 127; i <= 159; i++) /* DEL plus Control 1 */
|
|
|
2153 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
2154 Vstandard_syntax_table);
|
|
|
2155
|
|
|
2156 define_standard_syntax ("abcdefghijklmnopqrstuvwxyz"
|
|
|
2157 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
2158 "0123456789"
|
|
|
2159 "$%", Sword);
|
|
|
2160 define_standard_syntax ("\"", Sstring);
|
|
|
2161 define_standard_syntax ("\\", Sescape);
|
|
|
2162 define_standard_syntax ("_-+*/&|<>=", Ssymbol);
|
|
|
2163 define_standard_syntax (".,;:?!#@~^'`", Spunct);
|
|
|
2164
|
|
|
2165 for (p = "()[]{}"; *p; p+=2)
|
|
|
2166 {
|
|
|
2167 Fput_char_table (make_char (p[0]),
|
|
|
2168 Fcons (make_int (Sopen), make_char (p[1])),
|
|
|
2169 Vstandard_syntax_table);
|
|
|
2170 Fput_char_table (make_char (p[1]),
|
|
|
2171 Fcons (make_int (Sclose), make_char (p[0])),
|
|
|
2172 Vstandard_syntax_table);
|
|
|
2173 }
|
|
|
2174 }
|
