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0
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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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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.28. */
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23
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70
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24 /* This file has been Mule-ized. */
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25
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0
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26 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "buffer.h"
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30 #include "commands.h"
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31 #include "insdel.h"
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32 #include "syntax.h"
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33
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70
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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
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0
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59 Lisp_Object Qsyntax_table_p;
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60
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61 int words_include_escapes;
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62
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63 int parse_sexp_ignore_comments;
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64
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65 /* The following two variables are provided to tell additional information
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66 to the regex routines. We do it this way rather than change the
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67 arguments to re_search_2() in an attempt to maintain some call
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68 compatibility with other versions of the regex code. */
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69
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70 /* Tell the regex routines not to QUIT. Normally there is a QUIT
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71 each iteration in re_search_2(). */
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72 int no_quit_in_re_search;
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73
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74 /* Tell the regex routines which buffer to access for SYNTAX() lookups
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75 and the like. */
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76 struct buffer *regex_emacs_buffer;
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185
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77
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0
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78 Lisp_Object Vstandard_syntax_table;
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79
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80 Lisp_Object Vsyntax_designator_chars_string;
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81
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82 /* This is the internal form of the parse state used in parse-partial-sexp. */
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83
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84 struct lisp_parse_state
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2
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85 {
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86 int depth; /* Depth at end of parsing */
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87 Emchar instring; /* -1 if not within string, else desired terminator */
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88 int incomment; /* Nonzero if within a comment at end of parsing */
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89 int comstyle; /* comment style a=0, or b=1 */
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90 int quoted; /* Nonzero if just after an escape char at end of
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0
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91 parsing */
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2
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92 Bufpos thislevelstart;/* Char number of most recent start-of-expression
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93 at current level */
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94 Bufpos prevlevelstart;/* Char number of start of containing expression */
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95 Bufpos location; /* Char number at which parsing stopped */
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96 int mindepth; /* Minimum depth seen while scanning */
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97 Bufpos comstart; /* Position just after last comment starter */
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98 };
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0
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99
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100 /* These variables are a cache for finding the start of a defun.
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2
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101 find_start_pos is the place for which the defun start was found.
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102 find_start_value is the defun start position found for it.
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0
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103 find_start_buffer is the buffer it was found in.
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2
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104 find_start_begv is the BEGV value when it was found.
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0
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105 find_start_modiff is the value of MODIFF when it was found. */
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106
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107 static Bufpos find_start_pos;
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108 static Bufpos find_start_value;
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109 static struct buffer *find_start_buffer;
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110 static Bufpos find_start_begv;
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111 static int find_start_modiff;
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112
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113 /* Find a defun-start that is the last one before POS (or nearly the last).
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114 We record what we find, so that another call in the same area
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115 can return the same value right away. */
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116
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117 static Bufpos
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118 find_defun_start (struct buffer *buf, Bufpos pos)
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119 {
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120 Bufpos tem;
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70
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121 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
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0
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122
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123 /* Use previous finding, if it's valid and applies to this inquiry. */
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124 if (buf == find_start_buffer
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125 /* Reuse the defun-start even if POS is a little farther on.
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126 POS might be in the next defun, but that's ok.
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127 Our value may not be the best possible, but will still be usable. */
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128 && pos <= find_start_pos + 1000
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129 && pos >= find_start_value
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130 && BUF_BEGV (buf) == find_start_begv
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131 && BUF_MODIFF (buf) == find_start_modiff)
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132 return find_start_value;
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133
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134 /* Back up to start of line. */
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135 tem = find_next_newline (buf, pos, -1);
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136
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137 while (tem > BUF_BEGV (buf))
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138 {
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139 /* Open-paren at start of line means we found our defun-start. */
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70
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140 if (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, tem)) == Sopen)
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0
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141 break;
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142 /* Move to beg of previous line. */
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143 tem = find_next_newline (buf, tem, -2);
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144 }
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145
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146 /* Record what we found, for the next try. */
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2
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147 find_start_value = tem;
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0
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148 find_start_buffer = buf;
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149 find_start_modiff = BUF_MODIFF (buf);
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2
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150 find_start_begv = BUF_BEGV (buf);
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151 find_start_pos = pos;
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0
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152
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153 return find_start_value;
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154 }
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155
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20
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156 DEFUN ("syntax-table-p", Fsyntax_table_p, 1, 1, 0, /*
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0
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157 Return t if ARG is a syntax table.
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158 Any vector of 256 elements will do.
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20
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159 */
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160 (obj))
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0
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161 {
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272
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162 return CHAR_TABLEP (obj) && XCHAR_TABLE_TYPE (obj) == CHAR_TABLE_TYPE_SYNTAX
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163 ? Qt : Qnil;
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0
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164 }
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165
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166 static Lisp_Object
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272
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167 check_syntax_table (Lisp_Object obj, Lisp_Object default_)
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0
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168 {
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169 if (NILP (obj))
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272
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170 obj = default_;
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0
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171 while (NILP (Fsyntax_table_p (obj)))
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172 obj = wrong_type_argument (Qsyntax_table_p, obj);
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272
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173 return obj;
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0
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174 }
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175
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20
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176 DEFUN ("syntax-table", Fsyntax_table, 0, 1, 0, /*
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0
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177 Return the current syntax table.
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178 This is the one specified by the current buffer, or by BUFFER if it
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179 is non-nil.
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20
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180 */
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181 (buffer))
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0
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182 {
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183 return decode_buffer (buffer, 0)->syntax_table;
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184 }
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185
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20
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186 DEFUN ("standard-syntax-table", Fstandard_syntax_table, 0, 0, 0, /*
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0
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187 Return the standard syntax table.
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188 This is the one used for new buffers.
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20
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189 */
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190 ())
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0
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191 {
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192 return Vstandard_syntax_table;
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193 }
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194
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20
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195 DEFUN ("copy-syntax-table", Fcopy_syntax_table, 0, 1, 0, /*
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0
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196 Construct a new syntax table and return it.
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197 It is a copy of the TABLE, which defaults to the standard syntax table.
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20
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198 */
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199 (table))
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0
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200 {
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201 if (NILP (Vstandard_syntax_table))
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70
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202 return Fmake_char_table (Qsyntax);
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0
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203
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204 table = check_syntax_table (table, Vstandard_syntax_table);
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70
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205 return Fcopy_char_table (table);
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0
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206 }
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207
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20
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208 DEFUN ("set-syntax-table", Fset_syntax_table, 1, 2, 0, /*
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0
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209 Select a new syntax table for BUFFER.
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210 One argument, a syntax table.
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211 BUFFER defaults to the current buffer if omitted.
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20
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212 */
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213 (table, buffer))
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0
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214 {
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215 struct buffer *buf = decode_buffer (buffer, 0);
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216 table = check_syntax_table (table, Qnil);
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217 buf->syntax_table = table;
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70
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218 buf->mirror_syntax_table = XCHAR_TABLE (table)->mirror_table;
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0
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219 /* Indicate that this buffer now has a specified syntax table. */
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220 buf->local_var_flags |= XINT (buffer_local_flags.syntax_table);
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221 return table;
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222 }
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223
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224 /* Convert a letter which signifies a syntax code
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2
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225 into the code it signifies.
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226 This is used by modify-syntax-entry, and other things. */
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0
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227
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228 CONST unsigned char syntax_spec_code[0400] =
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70
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229 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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230 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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231 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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232 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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233 (char) Swhitespace, 0377, (char) Sstring, 0377,
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234 (char) Smath, 0377, 0377, (char) Squote,
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235 (char) Sopen, (char) Sclose, 0377, 0377,
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0
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236 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote,
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70
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237 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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238 0377, 0377, 0377, 0377,
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0
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239 (char) Scomment, 0377, (char) Sendcomment, 0377,
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70
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240 (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */
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241 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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242 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
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243 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol,
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244 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */
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245 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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246 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
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247 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377
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248 };
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0
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249
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70
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250 CONST unsigned char syntax_code_spec[] = " .w_()'\"$\\/<>@";
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0
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251
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20
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252 DEFUN ("syntax-designator-chars", Fsyntax_designator_chars, 0, 0, 0, /*
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0
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253 Return a string of the recognized syntax designator chars.
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254 The chars are ordered by their internal syntax codes, which are
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255 numbered starting at 0.
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20
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256 */
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257 ())
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0
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258 {
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259 return Vsyntax_designator_chars_string;
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260 }
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261
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20
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262 DEFUN ("char-syntax", Fchar_syntax, 1, 2, 0, /*
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0
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263 Return the syntax code of CHAR, described by a character.
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264 For example, if CHAR is a word constituent, the character `?w' is returned.
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265 The characters that correspond to various syntax codes
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266 are listed in the documentation of `modify-syntax-entry'.
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267 Optional second argument TABLE defaults to the current buffer's
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268 syntax table.
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20
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269 */
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270 (ch, table))
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0
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271 {
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70
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272 struct Lisp_Char_Table *mirrortab;
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273
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159
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274 if (NILP(ch))
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275 {
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195
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276 ch = make_char('\000');
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159
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277 }
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0
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278 CHECK_CHAR_COERCE_INT (ch);
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279 table = check_syntax_table (table, current_buffer->syntax_table);
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70
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280 mirrortab = XCHAR_TABLE (XCHAR_TABLE (table)->mirror_table);
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281 return make_char (syntax_code_spec[(int) SYNTAX (mirrortab, XCHAR (ch))]);
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0
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282 }
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283
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70
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284 #ifdef MULE
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285
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286 enum syntaxcode
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287 charset_syntax (struct buffer *buf, Lisp_Object charset, int *multi_p_out)
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288 {
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289 *multi_p_out = 1;
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290 /* #### get this right */
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291 return Spunct;
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292 }
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293
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294 #endif
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0
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295
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296 Lisp_Object
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297 syntax_match (Lisp_Object table, Emchar ch)
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298 {
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70
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299 Lisp_Object code = CHAR_TABLE_VALUE_UNSAFE (XCHAR_TABLE (table), ch);
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300 Lisp_Object code2 = code;
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0
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301
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70
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302 if (CONSP (code))
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303 code2 = XCAR (code);
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304 if (SYNTAX_FROM_CODE (XINT (code2)) == Sinherit)
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305 code = CHAR_TABLE_VALUE_UNSAFE (XCHAR_TABLE (Vstandard_syntax_table),
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306 ch);
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272
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307
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308 return CONSP (code) ? XCDR (code) : Qnil;
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0
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309 }
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310
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20
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311 DEFUN ("matching-paren", Fmatching_paren, 1, 2, 0, /*
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0
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312 Return the matching parenthesis of CHAR, or nil if none.
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313 Optional second argument TABLE defaults to the current buffer's
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314 syntax table.
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20
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315 */
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316 (ch, table))
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0
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317 {
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70
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318 struct Lisp_Char_Table *mirrortab;
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0
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319 int code;
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320
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70
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321 CHECK_CHAR_COERCE_INT (ch);
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0
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322 table = check_syntax_table (table, current_buffer->syntax_table);
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70
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323 mirrortab = XCHAR_TABLE (XCHAR_TABLE (table)->mirror_table);
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324 code = SYNTAX (mirrortab, XCHAR (ch));
|
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0
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325 if (code == Sopen || code == Sclose || code == Sstring)
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326 return syntax_match (table, XCHAR (ch));
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327 return Qnil;
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328 }
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329
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|
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330
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70
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331
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78
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332 static int
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70
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333 word_constituent_p (struct buffer *buf, Bufpos pos,
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334 struct Lisp_Char_Table *tab)
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335 {
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336 enum syntaxcode code = SYNTAX_UNSAFE (tab, BUF_FETCH_CHAR (buf, pos));
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337 return ((words_include_escapes &&
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338 (code == Sescape || code == Scharquote))
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339 || (code == Sword));
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340 }
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341
|
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0
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342 /* Return the position across COUNT words from FROM.
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343 If that many words cannot be found before the end of the buffer, return 0.
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344 COUNT negative means scan backward and stop at word beginning. */
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345
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346 Bufpos
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347 scan_words (struct buffer *buf, Bufpos from, int count)
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|
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348 {
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|
70
|
349 Bufpos limit = count > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
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|
|
350 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
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|
0
|
351 while (count > 0)
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|
|
352 {
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353 QUIT;
|
|
185
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354
|
|
0
|
355 while (1)
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|
|
356 {
|
|
70
|
357 if (from == limit)
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|
|
358 return 0;
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|
|
359 if (word_constituent_p (buf, from, mirrortab))
|
|
0
|
360 break;
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|
|
361 from++;
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|
|
362 }
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363
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|
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364 QUIT;
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|
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365
|
|
70
|
366 while ((from != limit) && word_constituent_p (buf, from, mirrortab))
|
|
0
|
367 {
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|
|
368 from++;
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|
|
369 }
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|
|
370 count--;
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|
|
371 }
|
|
185
|
372
|
|
0
|
373 while (count < 0)
|
|
|
374 {
|
|
|
375 QUIT;
|
|
|
376
|
|
|
377 while (1)
|
|
|
378 {
|
|
70
|
379 if (from == limit)
|
|
|
380 return 0;
|
|
|
381 if (word_constituent_p (buf, from - 1, mirrortab))
|
|
0
|
382 break;
|
|
|
383 from--;
|
|
|
384 }
|
|
|
385
|
|
|
386 QUIT;
|
|
|
387
|
|
70
|
388 while ((from != limit) && word_constituent_p (buf, from - 1, mirrortab))
|
|
0
|
389 {
|
|
|
390 from--;
|
|
|
391 }
|
|
|
392 count++;
|
|
|
393 }
|
|
|
394
|
|
|
395 return from;
|
|
|
396 }
|
|
|
397
|
|
20
|
398 DEFUN ("forward-word", Fforward_word, 1, 2, "_p", /*
|
|
0
|
399 Move point forward ARG words (backward if ARG is negative).
|
|
|
400 Normally returns t.
|
|
|
401 If an edge of the buffer is reached, point is left there
|
|
|
402 and nil is returned.
|
|
20
|
403 */
|
|
|
404 (count, buffer))
|
|
0
|
405 {
|
|
|
406 Bufpos val;
|
|
|
407 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
408 CHECK_INT (count);
|
|
|
409
|
|
|
410 if (!(val = scan_words (buf, BUF_PT (buf), XINT (count))))
|
|
|
411 {
|
|
|
412 BUF_SET_PT (buf, XINT (count) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf));
|
|
|
413 return Qnil;
|
|
|
414 }
|
|
|
415 BUF_SET_PT (buf, val);
|
|
|
416 return Qt;
|
|
|
417 }
|
|
|
418
|
|
|
419 static void scan_sexps_forward (struct buffer *buf,
|
|
|
420 struct lisp_parse_state *,
|
|
185
|
421 Bufpos from, Bufpos end,
|
|
0
|
422 int targetdepth, int stopbefore,
|
|
|
423 Lisp_Object oldstate,
|
|
|
424 int commentstop);
|
|
|
425
|
|
|
426 static int
|
|
|
427 find_start_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
428 {
|
|
|
429 Emchar c;
|
|
|
430 enum syntaxcode code;
|
|
70
|
431 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
432
|
|
|
433 /* Look back, counting the parity of string-quotes,
|
|
|
434 and recording the comment-starters seen.
|
|
|
435 When we reach a safe place, assume that's not in a string;
|
|
|
436 then step the main scan to the earliest comment-starter seen
|
|
|
437 an even number of string quotes away from the safe place.
|
|
185
|
438
|
|
0
|
439 OFROM[I] is position of the earliest comment-starter seen
|
|
|
440 which is I+2X quotes from the comment-end.
|
|
|
441 PARITY is current parity of quotes from the comment end. */
|
|
|
442 int parity = 0;
|
|
|
443 Emchar my_stringend = 0;
|
|
|
444 int string_lossage = 0;
|
|
|
445 Bufpos comment_end = from;
|
|
|
446 Bufpos comstart_pos = 0;
|
|
|
447 int comstart_parity = 0;
|
|
|
448 int styles_match_p = 0;
|
|
|
449
|
|
|
450 /* At beginning of range to scan, we're outside of strings;
|
|
|
451 that determines quote parity to the comment-end. */
|
|
|
452 while (from != stop)
|
|
|
453 {
|
|
|
454 /* Move back and examine a character. */
|
|
|
455 from--;
|
|
|
456
|
|
|
457 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
458 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
0
|
459
|
|
|
460 /* is this a 1-char comment end sequence? if so, try
|
|
|
461 to see if style matches previously extracted mask */
|
|
|
462 if (code == Sendcomment)
|
|
|
463 {
|
|
70
|
464 styles_match_p = SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask);
|
|
0
|
465 }
|
|
|
466
|
|
|
467 /* otherwise, is this a 2-char comment end sequence? */
|
|
|
468 else if (from >= stop
|
|
70
|
469 && SYNTAX_END_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
0
|
470 {
|
|
|
471 code = Sendcomment;
|
|
|
472 styles_match_p =
|
|
70
|
473 SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
0
|
474 BUF_FETCH_CHAR (buf, from+1),
|
|
|
475 mask);
|
|
|
476 }
|
|
185
|
477
|
|
0
|
478 /* or are we looking at a 1-char comment start sequence
|
|
|
479 of the style matching mask? */
|
|
|
480 else if (code == Scomment
|
|
70
|
481 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
0
|
482 {
|
|
|
483 styles_match_p = 1;
|
|
|
484 }
|
|
185
|
485
|
|
0
|
486 /* or possibly, a 2-char comment start sequence */
|
|
|
487 else if (from >= stop
|
|
70
|
488 && SYNTAX_STYLES_MATCH_START_P (mirrortab, c,
|
|
0
|
489 BUF_FETCH_CHAR (buf, from+1),
|
|
|
490 mask))
|
|
|
491 {
|
|
|
492 code = Scomment;
|
|
|
493 styles_match_p = 1;
|
|
|
494 }
|
|
|
495
|
|
|
496 /* Ignore escaped characters. */
|
|
|
497 if (char_quoted (buf, from))
|
|
|
498 continue;
|
|
|
499
|
|
|
500 /* Track parity of quotes. */
|
|
|
501 if (code == Sstring)
|
|
|
502 {
|
|
|
503 parity ^= 1;
|
|
|
504 if (my_stringend == 0)
|
|
|
505 my_stringend = c;
|
|
|
506 /* If we have two kinds of string delimiters.
|
|
|
507 There's no way to grok this scanning backwards. */
|
|
|
508 else if (my_stringend != c)
|
|
|
509 string_lossage = 1;
|
|
|
510 }
|
|
|
511
|
|
|
512 /* Record comment-starters according to that
|
|
|
513 quote-parity to the comment-end. */
|
|
|
514 if (code == Scomment && styles_match_p)
|
|
|
515 {
|
|
|
516 comstart_parity = parity;
|
|
|
517 comstart_pos = from;
|
|
|
518 }
|
|
|
519
|
|
|
520 /* If we find another earlier comment-ender,
|
|
|
521 any comment-starts earlier than that don't count
|
|
|
522 (because they go with the earlier comment-ender). */
|
|
|
523 if (code == Sendcomment && styles_match_p)
|
|
|
524 break;
|
|
|
525
|
|
|
526 /* Assume a defun-start point is outside of strings. */
|
|
|
527 if (code == Sopen
|
|
|
528 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n'))
|
|
|
529 break;
|
|
|
530 }
|
|
|
531
|
|
|
532 if (comstart_pos == 0)
|
|
|
533 from = comment_end;
|
|
|
534 /* If the earliest comment starter
|
|
|
535 is followed by uniform paired string quotes or none,
|
|
|
536 we know it can't be inside a string
|
|
|
537 since if it were then the comment ender would be inside one.
|
|
|
538 So it does start a comment. Skip back to it. */
|
|
|
539 else if (comstart_parity == 0 && !string_lossage)
|
|
|
540 from = comstart_pos;
|
|
|
541 else
|
|
|
542 {
|
|
|
543 /* We had two kinds of string delimiters mixed up
|
|
|
544 together. Decode this going forwards.
|
|
|
545 Scan fwd from the previous comment ender
|
|
|
546 to the one in question; this records where we
|
|
|
547 last passed a comment starter. */
|
|
|
548
|
|
|
549 struct lisp_parse_state state;
|
|
|
550 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end),
|
|
|
551 comment_end - 1, -10000, 0, Qnil, 0);
|
|
|
552 if (state.incomment)
|
|
|
553 from = state.comstart;
|
|
|
554 else
|
|
|
555 /* We can't grok this as a comment; scan it normally. */
|
|
|
556 from = comment_end;
|
|
|
557 }
|
|
|
558 return from;
|
|
|
559 }
|
|
|
560
|
|
|
561 static Bufpos
|
|
|
562 find_end_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
563 {
|
|
|
564 int c;
|
|
70
|
565 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
566
|
|
|
567 while (1)
|
|
|
568 {
|
|
|
569 if (from == stop)
|
|
|
570 {
|
|
|
571 return -1;
|
|
|
572 }
|
|
|
573 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
574 if (SYNTAX_UNSAFE (mirrortab, c) == Sendcomment
|
|
|
575 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
0
|
576 /* we have encountered a comment end of the same style
|
|
|
577 as the comment sequence which began this comment
|
|
|
578 section */
|
|
|
579 break;
|
|
|
580
|
|
|
581 from++;
|
|
|
582 if (from < stop
|
|
70
|
583 && SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
0
|
584 BUF_FETCH_CHAR (buf, from), mask))
|
|
|
585 /* we have encountered a comment end of the same style
|
|
|
586 as the comment sequence which began this comment
|
|
|
587 section */
|
|
|
588 { from++; break; }
|
|
|
589 }
|
|
|
590 return from;
|
|
|
591 }
|
|
|
592
|
|
|
593
|
|
|
594 /* #### between FSF 19.23 and 19.28 there are some changes to the logic
|
|
|
595 in this function (and minor changes to find_start_of_comment(),
|
|
|
596 above, which is part of Fforward_comment() in FSF). Attempts to port
|
|
|
597 that logic made this function break, so I'm leaving it out. If anyone
|
|
|
598 ever complains about this function not working properly, take a look
|
|
|
599 at those changes. --ben */
|
|
|
600
|
|
20
|
601 DEFUN ("forward-comment", Fforward_comment, 1, 2, 0, /*
|
|
0
|
602 Move forward across up to N comments. If N is negative, move backward.
|
|
|
603 Stop scanning if we find something other than a comment or whitespace.
|
|
|
604 Set point to where scanning stops.
|
|
|
605 If N comments are found as expected, with nothing except whitespace
|
|
|
606 between them, return t; otherwise return nil.
|
|
|
607 Point is set in either case.
|
|
|
608 Optional argument BUFFER defaults to the current buffer.
|
|
20
|
609 */
|
|
|
610 (n, buffer))
|
|
0
|
611 {
|
|
|
612 Bufpos from;
|
|
|
613 Bufpos stop;
|
|
|
614 Emchar c;
|
|
|
615 enum syntaxcode code;
|
|
|
616 int count;
|
|
|
617 struct buffer *buf = decode_buffer (buffer, 0);
|
|
70
|
618 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
619
|
|
|
620 CHECK_INT (n);
|
|
|
621 count = XINT (n);
|
|
|
622
|
|
|
623 from = BUF_PT (buf);
|
|
|
624
|
|
|
625 while (count > 0)
|
|
|
626 {
|
|
|
627 QUIT;
|
|
|
628
|
|
|
629 stop = BUF_ZV (buf);
|
|
|
630 while (from < stop)
|
|
|
631 {
|
|
|
632 int mask = 0; /* mask for finding matching comment style */
|
|
|
633
|
|
|
634 if (char_quoted (buf, from))
|
|
|
635 {
|
|
|
636 from++;
|
|
|
637 continue;
|
|
|
638 }
|
|
|
639
|
|
|
640 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
641 code = SYNTAX (mirrortab, c);
|
|
0
|
642
|
|
|
643 if (code == Scomment)
|
|
|
644 {
|
|
|
645 /* we have encountered a single character comment start
|
|
|
646 sequence, and we are ignoring all text inside comments.
|
|
|
647 we must record the comment style this character begins
|
|
|
648 so that later, only a comment end of the same style actually
|
|
|
649 ends the comment section */
|
|
70
|
650 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
0
|
651 }
|
|
|
652
|
|
|
653 else if (from < stop
|
|
70
|
654 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
0
|
655 {
|
|
185
|
656 /* we have encountered a 2char comment start sequence and we
|
|
0
|
657 are ignoring all text inside comments. we must record
|
|
|
658 the comment style this sequence begins so that later,
|
|
|
659 only a comment end of the same style actually ends
|
|
|
660 the comment section */
|
|
|
661 code = Scomment;
|
|
70
|
662 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
0
|
663 BUF_FETCH_CHAR (buf, from+1));
|
|
|
664 from++;
|
|
|
665 }
|
|
|
666
|
|
|
667 if (code == Scomment)
|
|
|
668 {
|
|
|
669 Bufpos newfrom;
|
|
|
670
|
|
|
671 newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
672 if (newfrom < 0)
|
|
|
673 {
|
|
|
674 /* we stopped because from==stop */
|
|
|
675 BUF_SET_PT (buf, stop);
|
|
|
676 return Qnil;
|
|
|
677 }
|
|
|
678 from = newfrom;
|
|
|
679
|
|
|
680 /* We have skipped one comment. */
|
|
|
681 break;
|
|
|
682 }
|
|
|
683 else if (code != Swhitespace
|
|
|
684 && code != Sendcomment
|
|
|
685 && code != Scomment )
|
|
|
686 {
|
|
|
687 BUF_SET_PT (buf, from);
|
|
|
688 return Qnil;
|
|
|
689 }
|
|
|
690 from++;
|
|
|
691 }
|
|
|
692
|
|
|
693 /* End of comment reached */
|
|
|
694 count--;
|
|
|
695 }
|
|
|
696
|
|
|
697 while (count < 0)
|
|
|
698 {
|
|
|
699 QUIT;
|
|
|
700
|
|
|
701 stop = BUF_BEGV (buf);
|
|
|
702 while (from > stop)
|
|
|
703 {
|
|
|
704 int mask = 0; /* mask for finding matching comment style */
|
|
|
705
|
|
|
706 from--;
|
|
|
707 if (char_quoted (buf, from))
|
|
|
708 {
|
|
|
709 from--;
|
|
|
710 continue;
|
|
|
711 }
|
|
185
|
712
|
|
0
|
713 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
714 code = SYNTAX (mirrortab, c);
|
|
0
|
715
|
|
|
716 if (code == Sendcomment)
|
|
|
717 {
|
|
|
718 /* we have found a single char end comment. we must record
|
|
|
719 the comment style encountered so that later, we can match
|
|
|
720 only the proper comment begin sequence of the same style */
|
|
70
|
721 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
0
|
722 }
|
|
|
723
|
|
|
724 else if (from > stop
|
|
70
|
725 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from - 1), c)
|
|
0
|
726 && !char_quoted (buf, from - 1))
|
|
|
727 {
|
|
|
728 /* We must record the comment style encountered so that
|
|
|
729 later, we can match only the proper comment begin
|
|
|
730 sequence of the same style. */
|
|
|
731 code = Sendcomment;
|
|
70
|
732 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
0
|
733 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
734 c);
|
|
|
735 from--;
|
|
|
736 }
|
|
|
737
|
|
|
738 if (code == Sendcomment)
|
|
|
739 {
|
|
|
740 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
741 break;
|
|
|
742 }
|
|
|
743
|
|
|
744 else if (code != Swhitespace
|
|
70
|
745 && SYNTAX (mirrortab, c) != Scomment
|
|
|
746 && SYNTAX (mirrortab, c) != Sendcomment)
|
|
0
|
747 {
|
|
|
748 BUF_SET_PT (buf, from + 1);
|
|
|
749 return Qnil;
|
|
|
750 }
|
|
|
751 }
|
|
|
752
|
|
|
753 count++;
|
|
|
754 }
|
|
|
755
|
|
|
756 BUF_SET_PT (buf, from);
|
|
|
757 return Qt;
|
|
|
758 }
|
|
|
759
|
|
|
760
|
|
|
761 Lisp_Object
|
|
|
762 scan_lists (struct buffer *buf, Bufpos from, int count, int depth,
|
|
|
763 int sexpflag, int no_error)
|
|
|
764 {
|
|
|
765 Bufpos stop;
|
|
|
766 Emchar c;
|
|
|
767 int quoted;
|
|
|
768 int mathexit = 0;
|
|
|
769 enum syntaxcode code;
|
|
|
770 int min_depth = depth; /* Err out if depth gets less than this. */
|
|
70
|
771 Lisp_Object syntaxtab = buf->syntax_table;
|
|
|
772 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
773
|
|
|
774 if (depth > 0) min_depth = 0;
|
|
|
775
|
|
|
776 while (count > 0)
|
|
|
777 {
|
|
|
778 QUIT;
|
|
|
779
|
|
|
780 stop = BUF_ZV (buf);
|
|
|
781 while (from < stop)
|
|
|
782 {
|
|
|
783 int mask = 0; /* mask for finding matching comment style */
|
|
|
784
|
|
|
785 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
786 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
0
|
787 from++;
|
|
|
788
|
|
|
789 /* a 1-char comment start sequence */
|
|
|
790 if (code == Scomment && parse_sexp_ignore_comments)
|
|
|
791 {
|
|
70
|
792 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
0
|
793 }
|
|
|
794
|
|
|
795 /* else, a 2-char comment start sequence? */
|
|
|
796 else if (from < stop
|
|
70
|
797 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from))
|
|
0
|
798 && parse_sexp_ignore_comments)
|
|
|
799 {
|
|
185
|
800 /* we have encountered a comment start sequence and we
|
|
0
|
801 are ignoring all text inside comments. we must record
|
|
|
802 the comment style this sequence begins so that later,
|
|
|
803 only a comment end of the same style actually ends
|
|
|
804 the comment section */
|
|
|
805 code = Scomment;
|
|
70
|
806 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
0
|
807 BUF_FETCH_CHAR (buf, from));
|
|
|
808 from++;
|
|
|
809 }
|
|
185
|
810
|
|
70
|
811 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
0
|
812 continue;
|
|
|
813
|
|
|
814 switch (code)
|
|
|
815 {
|
|
|
816 case Sescape:
|
|
|
817 case Scharquote:
|
|
|
818 if (from == stop) goto lose;
|
|
|
819 from++;
|
|
|
820 /* treat following character as a word constituent */
|
|
|
821 case Sword:
|
|
|
822 case Ssymbol:
|
|
|
823 if (depth || !sexpflag) break;
|
|
|
824 /* This word counts as a sexp; return at end of it. */
|
|
|
825 while (from < stop)
|
|
|
826 {
|
|
70
|
827 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
0
|
828 {
|
|
|
829 case Scharquote:
|
|
|
830 case Sescape:
|
|
|
831 from++;
|
|
|
832 if (from == stop) goto lose;
|
|
|
833 break;
|
|
|
834 case Sword:
|
|
|
835 case Ssymbol:
|
|
|
836 case Squote:
|
|
|
837 break;
|
|
|
838 default:
|
|
|
839 goto done;
|
|
|
840 }
|
|
|
841 from++;
|
|
|
842 }
|
|
|
843 goto done;
|
|
|
844
|
|
|
845 case Scomment:
|
|
|
846 if (!parse_sexp_ignore_comments)
|
|
|
847 break;
|
|
|
848 {
|
|
|
849 Bufpos newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
850 if (newfrom < 0)
|
|
|
851 {
|
|
|
852 /* we stopped because from == stop in search forward */
|
|
|
853 from = stop;
|
|
|
854 if (depth == 0)
|
|
|
855 goto done;
|
|
|
856 goto lose;
|
|
|
857 }
|
|
|
858 from = newfrom;
|
|
|
859 }
|
|
|
860 break;
|
|
|
861
|
|
|
862 case Smath:
|
|
|
863 if (!sexpflag)
|
|
|
864 break;
|
|
|
865 if (from != stop && c == BUF_FETCH_CHAR (buf, from))
|
|
|
866 from++;
|
|
|
867 if (mathexit)
|
|
|
868 {
|
|
|
869 mathexit = 0;
|
|
|
870 goto close1;
|
|
|
871 }
|
|
|
872 mathexit = 1;
|
|
|
873
|
|
|
874 case Sopen:
|
|
|
875 if (!++depth) goto done;
|
|
|
876 break;
|
|
|
877
|
|
|
878 case Sclose:
|
|
|
879 close1:
|
|
|
880 if (!--depth) goto done;
|
|
|
881 if (depth < min_depth)
|
|
|
882 {
|
|
|
883 if (no_error)
|
|
|
884 return Qnil;
|
|
|
885 error ("Containing expression ends prematurely");
|
|
|
886 }
|
|
|
887 break;
|
|
|
888
|
|
|
889 case Sstring:
|
|
|
890 {
|
|
|
891 /* XEmacs change: call syntax_match on character */
|
|
|
892 Emchar ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
70
|
893 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
0
|
894 Emchar stringterm;
|
|
|
895
|
|
|
896 if (CHARP (stermobj))
|
|
|
897 stringterm = XCHAR (stermobj);
|
|
|
898 else
|
|
|
899 stringterm = ch;
|
|
185
|
900
|
|
0
|
901 while (1)
|
|
|
902 {
|
|
|
903 if (from >= stop)
|
|
|
904 goto lose;
|
|
|
905 if (BUF_FETCH_CHAR (buf, from) == stringterm)
|
|
|
906 break;
|
|
70
|
907 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
0
|
908 {
|
|
|
909 case Scharquote:
|
|
|
910 case Sescape:
|
|
|
911 from++;
|
|
|
912 break;
|
|
|
913 default:
|
|
|
914 break;
|
|
|
915 }
|
|
|
916 from++;
|
|
|
917 }
|
|
|
918 from++;
|
|
|
919 if (!depth && sexpflag) goto done;
|
|
|
920 break;
|
|
|
921 }
|
|
185
|
922
|
|
0
|
923 default:
|
|
|
924 break;
|
|
|
925 }
|
|
|
926 }
|
|
|
927
|
|
|
928 /* Reached end of buffer. Error if within object,
|
|
|
929 return nil if between */
|
|
|
930 if (depth) goto lose;
|
|
|
931
|
|
|
932 return Qnil;
|
|
|
933
|
|
|
934 /* End of object reached */
|
|
|
935 done:
|
|
|
936 count--;
|
|
|
937 }
|
|
|
938
|
|
|
939 while (count < 0)
|
|
|
940 {
|
|
|
941 QUIT;
|
|
|
942
|
|
|
943 stop = BUF_BEGV (buf);
|
|
|
944 while (from > stop)
|
|
|
945 {
|
|
|
946 int mask = 0; /* mask for finding matching comment style */
|
|
|
947
|
|
|
948 from--;
|
|
|
949 quoted = char_quoted (buf, from);
|
|
|
950 if (quoted)
|
|
|
951 from--;
|
|
|
952
|
|
|
953 c = BUF_FETCH_CHAR (buf, from);
|
|
70
|
954 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
0
|
955
|
|
|
956 if (code == Sendcomment && parse_sexp_ignore_comments)
|
|
|
957 {
|
|
|
958 /* we have found a single char end comment. we must record
|
|
|
959 the comment style encountered so that later, we can match
|
|
|
960 only the proper comment begin sequence of the same style */
|
|
70
|
961 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
0
|
962 }
|
|
|
963
|
|
|
964 else if (from > stop
|
|
70
|
965 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from-1), c)
|
|
0
|
966 && !char_quoted (buf, from - 1)
|
|
|
967 && parse_sexp_ignore_comments)
|
|
|
968 {
|
|
|
969 /* we must record the comment style encountered so that
|
|
|
970 later, we can match only the proper comment begin
|
|
|
971 sequence of the same style */
|
|
|
972 code = Sendcomment;
|
|
70
|
973 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
0
|
974 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
975 c);
|
|
|
976 from--;
|
|
|
977 }
|
|
|
978
|
|
70
|
979 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
0
|
980 continue;
|
|
|
981
|
|
|
982 switch (((quoted) ? Sword : code))
|
|
|
983 {
|
|
|
984 case Sword:
|
|
|
985 case Ssymbol:
|
|
|
986 if (depth || !sexpflag) break;
|
|
185
|
987 /* This word counts as a sexp; count object finished after
|
|
0
|
988 passing it. */
|
|
|
989 while (from > stop)
|
|
|
990 {
|
|
|
991 enum syntaxcode syncode;
|
|
|
992 quoted = char_quoted (buf, from - 1);
|
|
185
|
993
|
|
0
|
994 if (quoted)
|
|
|
995 from--;
|
|
|
996 if (! (quoted
|
|
|
997 || (syncode =
|
|
70
|
998 SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
0
|
999 == Sword
|
|
|
1000 || syncode == Ssymbol
|
|
|
1001 || syncode == Squote))
|
|
|
1002 goto done2;
|
|
|
1003 from--;
|
|
|
1004 }
|
|
|
1005 goto done2;
|
|
|
1006
|
|
|
1007 case Smath:
|
|
|
1008 if (!sexpflag)
|
|
|
1009 break;
|
|
|
1010 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1011 from--;
|
|
|
1012 if (mathexit)
|
|
|
1013 {
|
|
|
1014 mathexit = 0;
|
|
|
1015 goto open2;
|
|
|
1016 }
|
|
|
1017 mathexit = 1;
|
|
|
1018
|
|
|
1019 case Sclose:
|
|
|
1020 if (!++depth) goto done2;
|
|
|
1021 break;
|
|
|
1022
|
|
|
1023 case Sopen:
|
|
|
1024 open2:
|
|
|
1025 if (!--depth) goto done2;
|
|
|
1026 if (depth < min_depth)
|
|
|
1027 {
|
|
|
1028 if (no_error)
|
|
|
1029 return Qnil;
|
|
|
1030 error ("Containing expression ends prematurely");
|
|
|
1031 }
|
|
|
1032 break;
|
|
|
1033
|
|
|
1034 case Sendcomment:
|
|
|
1035 if (parse_sexp_ignore_comments)
|
|
|
1036 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
1037 break;
|
|
|
1038
|
|
|
1039 case Sstring:
|
|
|
1040 {
|
|
|
1041 /* XEmacs change: call syntax_match() on character */
|
|
|
1042 Emchar ch = BUF_FETCH_CHAR (buf, from);
|
|
70
|
1043 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
0
|
1044 Emchar stringterm;
|
|
|
1045
|
|
|
1046 if (CHARP (stermobj))
|
|
|
1047 stringterm = XCHAR (stermobj);
|
|
|
1048 else
|
|
|
1049 stringterm = ch;
|
|
|
1050
|
|
|
1051 while (1)
|
|
|
1052 {
|
|
|
1053 if (from == stop) goto lose;
|
|
|
1054 if (!char_quoted (buf, from - 1)
|
|
|
1055 && stringterm == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1056 break;
|
|
|
1057 from--;
|
|
|
1058 }
|
|
|
1059 from--;
|
|
|
1060 if (!depth && sexpflag) goto done2;
|
|
|
1061 break;
|
|
|
1062 }
|
|
|
1063 }
|
|
|
1064 }
|
|
|
1065
|
|
|
1066 /* Reached start of buffer. Error if within object,
|
|
|
1067 return nil if between */
|
|
|
1068 if (depth) goto lose;
|
|
|
1069
|
|
|
1070 return Qnil;
|
|
|
1071
|
|
|
1072 done2:
|
|
|
1073 count++;
|
|
|
1074 }
|
|
|
1075
|
|
|
1076
|
|
|
1077 return (make_int (from));
|
|
|
1078
|
|
|
1079 lose:
|
|
|
1080 if (!no_error)
|
|
|
1081 error ("Unbalanced parentheses");
|
|
|
1082 return Qnil;
|
|
|
1083 }
|
|
|
1084
|
|
|
1085 int
|
|
|
1086 char_quoted (struct buffer *buf, Bufpos pos)
|
|
|
1087 {
|
|
|
1088 enum syntaxcode code;
|
|
|
1089 Bufpos beg = BUF_BEGV (buf);
|
|
|
1090 int quoted = 0;
|
|
70
|
1091 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
1092
|
|
|
1093 while (pos > beg
|
|
70
|
1094 && ((code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)))
|
|
0
|
1095 == Scharquote
|
|
|
1096 || code == Sescape))
|
|
|
1097 pos--, quoted = !quoted;
|
|
|
1098 return quoted;
|
|
|
1099 }
|
|
|
1100
|
|
20
|
1101 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /*
|
|
0
|
1102 Scan from character number FROM by COUNT lists.
|
|
|
1103 Returns the character number of the position thus found.
|
|
|
1104
|
|
|
1105 If DEPTH is nonzero, paren depth begins counting from that value,
|
|
|
1106 only places where the depth in parentheses becomes zero
|
|
|
1107 are candidates for stopping; COUNT such places are counted.
|
|
|
1108 Thus, a positive value for DEPTH means go out levels.
|
|
|
1109
|
|
|
1110 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1111
|
|
|
1112 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1113 and the depth is wrong, an error is signaled.
|
|
|
1114 If the depth is right but the count is not used up, nil is returned.
|
|
|
1115
|
|
|
1116 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1117 of in the current buffer.
|
|
|
1118
|
|
|
1119 If optional arg NOERROR is non-nil, scan-lists will return nil instead of
|
|
|
1120 signalling an error.
|
|
20
|
1121 */
|
|
|
1122 (from, count, depth, buffer, no_error))
|
|
0
|
1123 {
|
|
|
1124 struct buffer *buf;
|
|
|
1125
|
|
|
1126 CHECK_INT (from);
|
|
|
1127 CHECK_INT (count);
|
|
|
1128 CHECK_INT (depth);
|
|
|
1129 buf = decode_buffer (buffer, 0);
|
|
|
1130
|
|
|
1131 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0,
|
|
|
1132 !NILP (no_error));
|
|
|
1133 }
|
|
|
1134
|
|
20
|
1135 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /*
|
|
0
|
1136 Scan from character number FROM by COUNT balanced expressions.
|
|
|
1137 If COUNT is negative, scan backwards.
|
|
|
1138 Returns the character number of the position thus found.
|
|
|
1139
|
|
|
1140 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1141
|
|
|
1142 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1143 in the middle of a parenthetical grouping, an error is signaled.
|
|
|
1144 If the beginning or end is reached between groupings
|
|
|
1145 but before count is used up, nil is returned.
|
|
|
1146
|
|
|
1147 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1148 of in the current buffer.
|
|
|
1149
|
|
|
1150 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of
|
|
|
1151 signalling an error.
|
|
20
|
1152 */
|
|
|
1153 (from, count, buffer, no_error))
|
|
0
|
1154 {
|
|
|
1155 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1156 CHECK_INT (from);
|
|
|
1157 CHECK_INT (count);
|
|
|
1158
|
|
|
1159 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (no_error));
|
|
|
1160 }
|
|
|
1161
|
|
20
|
1162 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /*
|
|
0
|
1163 Move point backward over any number of chars with prefix syntax.
|
|
185
|
1164 This includes chars with "quote" or "prefix" syntax (' or p).
|
|
0
|
1165
|
|
|
1166 Optional arg BUFFER defaults to the current buffer.
|
|
20
|
1167 */
|
|
|
1168 (buffer))
|
|
0
|
1169 {
|
|
|
1170 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1171 Bufpos beg = BUF_BEGV (buf);
|
|
|
1172 Bufpos pos = BUF_PT (buf);
|
|
70
|
1173 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
1174
|
|
|
1175 while (pos > beg && !char_quoted (buf, pos - 1)
|
|
70
|
1176 && (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)) == Squote
|
|
|
1177 || SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1))))
|
|
0
|
1178 pos--;
|
|
|
1179
|
|
|
1180 BUF_SET_PT (buf, pos);
|
|
|
1181
|
|
|
1182 return Qnil;
|
|
|
1183 }
|
|
|
1184
|
|
|
1185 /* Parse forward from FROM to END,
|
|
|
1186 assuming that FROM has state OLDSTATE (nil means FROM is start of function),
|
|
|
1187 and return a description of the state of the parse at END.
|
|
|
1188 If STOPBEFORE is nonzero, stop at the start of an atom.
|
|
|
1189 If COMMENTSTOP is nonzero, stop at the start of a comment. */
|
|
|
1190
|
|
|
1191 static void
|
|
|
1192 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr,
|
|
185
|
1193 Bufpos from, Bufpos end,
|
|
0
|
1194 int targetdepth, int stopbefore,
|
|
|
1195 Lisp_Object oldstate,
|
|
|
1196 int commentstop)
|
|
|
1197 {
|
|
|
1198 struct lisp_parse_state state;
|
|
|
1199
|
|
|
1200 enum syntaxcode code;
|
|
|
1201 struct level { int last, prev; };
|
|
|
1202 struct level levelstart[100];
|
|
|
1203 struct level *curlevel = levelstart;
|
|
|
1204 struct level *endlevel = levelstart + 100;
|
|
|
1205 int depth; /* Paren depth of current scanning location.
|
|
|
1206 level - levelstart equals this except
|
|
|
1207 when the depth becomes negative. */
|
|
|
1208 int mindepth; /* Lowest DEPTH value seen. */
|
|
|
1209 int start_quoted = 0; /* Nonzero means starting after a char quote */
|
|
|
1210 Lisp_Object tem;
|
|
|
1211 int mask; /* comment mask */
|
|
70
|
1212 Lisp_Object syntaxtab = buf->syntax_table;
|
|
|
1213 struct Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
0
|
1214
|
|
|
1215 if (NILP (oldstate))
|
|
|
1216 {
|
|
|
1217 depth = 0;
|
|
|
1218 state.instring = -1;
|
|
|
1219 state.incomment = 0;
|
|
|
1220 state.comstyle = 0; /* comment style a by default */
|
|
|
1221 mask = SYNTAX_COMMENT_STYLE_A;
|
|
|
1222 }
|
|
|
1223 else
|
|
|
1224 {
|
|
|
1225 tem = Fcar (oldstate); /* elt 0, depth */
|
|
|
1226 if (!NILP (tem))
|
|
|
1227 depth = XINT (tem);
|
|
|
1228 else
|
|
|
1229 depth = 0;
|
|
|
1230
|
|
|
1231 oldstate = Fcdr (oldstate);
|
|
|
1232 oldstate = Fcdr (oldstate);
|
|
|
1233 oldstate = Fcdr (oldstate);
|
|
|
1234 tem = Fcar (oldstate); /* elt 3, instring */
|
|
|
1235 state.instring = !NILP (tem) ? XINT (tem) : -1;
|
|
|
1236
|
|
|
1237 oldstate = Fcdr (oldstate); /* elt 4, incomment */
|
|
|
1238 tem = Fcar (oldstate);
|
|
|
1239 state.incomment = !NILP (tem);
|
|
|
1240
|
|
|
1241 oldstate = Fcdr (oldstate);
|
|
|
1242 tem = Fcar (oldstate); /* elt 5, follows-quote */
|
|
|
1243 start_quoted = !NILP (tem);
|
|
|
1244
|
|
|
1245 /* if the eighth element of the list is nil, we are in comment style
|
|
|
1246 a. if it is non-nil, we are in comment style b */
|
|
|
1247 oldstate = Fcdr (oldstate);
|
|
|
1248 oldstate = Fcdr (oldstate);
|
|
|
1249 oldstate = Fcdr (oldstate);
|
|
|
1250 tem = Fcar (oldstate); /* elt 8, comment style a */
|
|
|
1251 state.comstyle = !NILP (tem);
|
|
|
1252 mask = state.comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A;
|
|
|
1253 }
|
|
|
1254 state.quoted = 0;
|
|
|
1255 mindepth = depth;
|
|
|
1256
|
|
|
1257 curlevel->prev = -1;
|
|
|
1258 curlevel->last = -1;
|
|
|
1259
|
|
|
1260 /* Enter the loop at a place appropriate for initial state. */
|
|
|
1261
|
|
|
1262 if (state.incomment) goto startincomment;
|
|
|
1263 if (state.instring >= 0)
|
|
|
1264 {
|
|
|
1265 if (start_quoted) goto startquotedinstring;
|
|
|
1266 goto startinstring;
|
|
|
1267 }
|
|
|
1268 if (start_quoted) goto startquoted;
|
|
|
1269
|
|
|
1270 while (from < end)
|
|
|
1271 {
|
|
|
1272 QUIT;
|
|
|
1273
|
|
70
|
1274 code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from));
|
|
0
|
1275 from++;
|
|
|
1276
|
|
|
1277 if (code == Scomment)
|
|
|
1278 {
|
|
|
1279 /* record the comment style we have entered so that only the
|
|
|
1280 comment-ender sequence (or single char) of the same style
|
|
|
1281 actually terminates the comment section. */
|
|
70
|
1282 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab,
|
|
0
|
1283 BUF_FETCH_CHAR (buf, from-1));
|
|
|
1284 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1285 state.comstart = from - 1;
|
|
|
1286 }
|
|
185
|
1287
|
|
0
|
1288 else if (from < end &&
|
|
70
|
1289 SYNTAX_START_P (mirrortab, BUF_FETCH_CHAR (buf, from-1),
|
|
0
|
1290 BUF_FETCH_CHAR (buf, from)))
|
|
|
1291 {
|
|
|
1292 /* Record the comment style we have entered so that only
|
|
|
1293 the comment-end sequence of the same style actually
|
|
|
1294 terminates the comment section. */
|
|
|
1295 code = Scomment;
|
|
70
|
1296 mask = SYNTAX_COMMENT_MASK_START (mirrortab,
|
|
0
|
1297 BUF_FETCH_CHAR (buf, from-1),
|
|
|
1298 BUF_FETCH_CHAR (buf, from));
|
|
|
1299 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1300 state.comstart = from-1;
|
|
|
1301 from++;
|
|
|
1302 }
|
|
|
1303
|
|
70
|
1304 if (SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
0
|
1305 continue;
|
|
|
1306 switch (code)
|
|
|
1307 {
|
|
|
1308 case Sescape:
|
|
|
1309 case Scharquote:
|
|
|
1310 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1311 curlevel->last = from - 1;
|
|
|
1312 startquoted:
|
|
|
1313 if (from == end) goto endquoted;
|
|
|
1314 from++;
|
|
|
1315 goto symstarted;
|
|
|
1316 /* treat following character as a word constituent */
|
|
|
1317 case Sword:
|
|
|
1318 case Ssymbol:
|
|
|
1319 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1320 curlevel->last = from - 1;
|
|
|
1321 symstarted:
|
|
|
1322 while (from < end)
|
|
|
1323 {
|
|
70
|
1324 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
0
|
1325 {
|
|
|
1326 case Scharquote:
|
|
|
1327 case Sescape:
|
|
|
1328 from++;
|
|
|
1329 if (from == end) goto endquoted;
|
|
|
1330 break;
|
|
|
1331 case Sword:
|
|
|
1332 case Ssymbol:
|
|
|
1333 case Squote:
|
|
|
1334 break;
|
|
|
1335 default:
|
|
|
1336 goto symdone;
|
|
|
1337 }
|
|
|
1338 from++;
|
|
|
1339 }
|
|
|
1340 symdone:
|
|
|
1341 curlevel->prev = curlevel->last;
|
|
|
1342 break;
|
|
|
1343
|
|
|
1344 case Scomment:
|
|
|
1345 state.incomment = 1;
|
|
|
1346 startincomment:
|
|
|
1347 if (commentstop)
|
|
|
1348 goto done;
|
|
|
1349 {
|
|
|
1350 Bufpos newfrom = find_end_of_comment (buf, from, end, mask);
|
|
|
1351 if (newfrom < 0)
|
|
|
1352 {
|
|
|
1353 /* we terminated search because from == end */
|
|
|
1354 from = end;
|
|
|
1355 goto done;
|
|
|
1356 }
|
|
|
1357 from = newfrom;
|
|
|
1358 }
|
|
|
1359 state.incomment = 0;
|
|
|
1360 state.comstyle = 0; /* reset the comment style */
|
|
|
1361 mask = 0;
|
|
|
1362 break;
|
|
|
1363
|
|
|
1364 case Sopen:
|
|
|
1365 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1366 depth++;
|
|
|
1367 /* curlevel++->last ran into compiler bug on Apollo */
|
|
|
1368 curlevel->last = from - 1;
|
|
|
1369 if (++curlevel == endlevel)
|
|
|
1370 error ("Nesting too deep for parser");
|
|
|
1371 curlevel->prev = -1;
|
|
|
1372 curlevel->last = -1;
|
|
88
|
1373 if (targetdepth == depth) goto done;
|
|
0
|
1374 break;
|
|
|
1375
|
|
|
1376 case Sclose:
|
|
|
1377 depth--;
|
|
|
1378 if (depth < mindepth)
|
|
|
1379 mindepth = depth;
|
|
|
1380 if (curlevel != levelstart)
|
|
|
1381 curlevel--;
|
|
|
1382 curlevel->prev = curlevel->last;
|
|
88
|
1383 if (targetdepth == depth) goto done;
|
|
0
|
1384 break;
|
|
|
1385
|
|
|
1386 case Sstring:
|
|
|
1387 {
|
|
|
1388 Emchar ch;
|
|
|
1389 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1390 curlevel->last = from - 1;
|
|
|
1391 /* XEmacs change: call syntax_match() on character */
|
|
|
1392 ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
1393 {
|
|
70
|
1394 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
0
|
1395
|
|
|
1396 if (CHARP (stermobj))
|
|
|
1397 state.instring = XCHAR (stermobj);
|
|
|
1398 else
|
|
|
1399 state.instring = ch;
|
|
|
1400 }
|
|
|
1401 }
|
|
|
1402 startinstring:
|
|
|
1403 while (1)
|
|
|
1404 {
|
|
|
1405 if (from >= end) goto done;
|
|
|
1406 if (BUF_FETCH_CHAR (buf, from) == state.instring) break;
|
|
70
|
1407 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
0
|
1408 {
|
|
|
1409 case Scharquote:
|
|
|
1410 case Sescape:
|
|
|
1411 {
|
|
|
1412 from++;
|
|
|
1413 startquotedinstring:
|
|
|
1414 if (from >= end) goto endquoted;
|
|
|
1415 break;
|
|
|
1416 }
|
|
|
1417 default:
|
|
|
1418 break;
|
|
|
1419 }
|
|
|
1420 from++;
|
|
|
1421 }
|
|
|
1422 state.instring = -1;
|
|
|
1423 curlevel->prev = curlevel->last;
|
|
|
1424 from++;
|
|
|
1425 break;
|
|
|
1426
|
|
|
1427 case Smath:
|
|
|
1428 break;
|
|
|
1429
|
|
|
1430 case Swhitespace:
|
|
|
1431 case Spunct:
|
|
|
1432 case Squote:
|
|
|
1433 case Sendcomment:
|
|
|
1434 case Sinherit:
|
|
|
1435 case Smax:
|
|
|
1436 break;
|
|
|
1437 }
|
|
|
1438 }
|
|
|
1439 goto done;
|
|
|
1440
|
|
|
1441 stop: /* Here if stopping before start of sexp. */
|
|
|
1442 from--; /* We have just fetched the char that starts it; */
|
|
|
1443 goto done; /* but return the position before it. */
|
|
|
1444
|
|
|
1445 endquoted:
|
|
|
1446 state.quoted = 1;
|
|
|
1447 done:
|
|
|
1448 state.depth = depth;
|
|
|
1449 state.mindepth = mindepth;
|
|
|
1450 state.thislevelstart = curlevel->prev;
|
|
|
1451 state.prevlevelstart
|
|
|
1452 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last;
|
|
|
1453 state.location = from;
|
|
|
1454
|
|
|
1455 *stateptr = state;
|
|
|
1456 }
|
|
|
1457
|
|
20
|
1458 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /*
|
|
0
|
1459 Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
|
|
|
1460 Parsing stops at TO or when certain criteria are met;
|
|
|
1461 point is set to where parsing stops.
|
|
|
1462 If fifth arg STATE is omitted or nil,
|
|
|
1463 parsing assumes that FROM is the beginning of a function.
|
|
|
1464 Value is a list of eight elements describing final state of parsing:
|
|
|
1465 0. depth in parens.
|
|
|
1466 1. character address of start of innermost containing list; nil if none.
|
|
|
1467 2. character address of start of last complete sexp terminated.
|
|
|
1468 3. non-nil if inside a string.
|
|
|
1469 (It is the character that will terminate the string.)
|
|
|
1470 4. t if inside a comment.
|
|
|
1471 5. t if following a quote character.
|
|
|
1472 6. the minimum paren-depth encountered during this scan.
|
|
|
1473 7. nil if in comment style a, or not in a comment; t if in comment style b
|
|
|
1474 If third arg TARGETDEPTH is non-nil, parsing stops if the depth
|
|
|
1475 in parentheses becomes equal to TARGETDEPTH.
|
|
|
1476 Fourth arg STOPBEFORE non-nil means stop when come to
|
|
|
1477 any character that starts a sexp.
|
|
|
1478 Fifth arg STATE is an eight-element list like what this function returns.
|
|
|
1479 It is used to initialize the state of the parse. Its second and third
|
|
|
1480 elements are ignored.
|
|
|
1481 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.
|
|
20
|
1482 */
|
|
|
1483 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer))
|
|
0
|
1484 {
|
|
|
1485 struct lisp_parse_state state;
|
|
|
1486 int target;
|
|
|
1487 Bufpos start, end;
|
|
|
1488 struct buffer *buf = decode_buffer (buffer, 0);
|
|
272
|
1489 Lisp_Object val;
|
|
0
|
1490
|
|
|
1491 if (!NILP (targetdepth))
|
|
|
1492 {
|
|
|
1493 CHECK_INT (targetdepth);
|
|
|
1494 target = XINT (targetdepth);
|
|
|
1495 }
|
|
|
1496 else
|
|
|
1497 target = -100000; /* We won't reach this depth */
|
|
|
1498
|
|
|
1499 get_buffer_range_char (buf, from, to, &start, &end, 0);
|
|
|
1500 scan_sexps_forward (buf, &state, start, end,
|
|
|
1501 target, !NILP (stopbefore), oldstate,
|
|
|
1502 !NILP (commentstop));
|
|
|
1503
|
|
|
1504 BUF_SET_PT (buf, state.location);
|
|
|
1505
|
|
272
|
1506 /* reverse order */
|
|
|
1507 val = Qnil;
|
|
|
1508 val = Fcons (state.comstyle ? Qt : Qnil, val);
|
|
|
1509 val = Fcons (make_int (state.mindepth), val);
|
|
|
1510 val = Fcons (state.quoted ? Qt : Qnil, val);
|
|
|
1511 val = Fcons (state.incomment ? Qt : Qnil, val);
|
|
|
1512 val = Fcons (state.instring < 0 ? Qnil : make_int (state.instring), val);
|
|
|
1513 val = Fcons (state.thislevelstart < 0 ? Qnil : make_int (state.thislevelstart), val);
|
|
|
1514 val = Fcons (state.prevlevelstart < 0 ? Qnil : make_int (state.prevlevelstart), val);
|
|
|
1515 val = Fcons (make_int (state.depth), val);
|
|
0
|
1516
|
|
272
|
1517 return val;
|
|
0
|
1518 }
|
|
|
1519
|
|
70
|
1520
|
|
|
1521 /* Updating of the mirror syntax table.
|
|
|
1522
|
|
|
1523 Each syntax table has a corresponding mirror table in it.
|
|
|
1524 Whenever we make a change to a syntax table, we call
|
|
|
1525 update_syntax_table() on it.
|
|
|
1526
|
|
|
1527 #### We really only need to map over the changed range.
|
|
|
1528
|
|
|
1529 If we change the standard syntax table, we need to map over
|
|
|
1530 all tables because any of them could be inheriting from the
|
|
|
1531 standard syntax table.
|
|
|
1532
|
|
|
1533 When `set-syntax-table' is called, we set the buffer's mirror
|
|
|
1534 syntax table as well.
|
|
|
1535 */
|
|
|
1536
|
|
|
1537 struct cmst_arg
|
|
|
1538 {
|
|
|
1539 Lisp_Object mirrortab;
|
|
|
1540 int check_inherit;
|
|
|
1541 };
|
|
|
1542
|
|
|
1543 static int
|
|
|
1544 cmst_mapfun (struct chartab_range *range, Lisp_Object val, void *arg)
|
|
|
1545 {
|
|
|
1546 struct cmst_arg *closure = (struct cmst_arg *) arg;
|
|
|
1547
|
|
|
1548 if (CONSP (val))
|
|
|
1549 val = XCAR (val);
|
|
|
1550 if (SYNTAX_FROM_CODE (XINT (val)) == Sinherit
|
|
|
1551 && closure->check_inherit)
|
|
|
1552 {
|
|
|
1553 struct cmst_arg recursive;
|
|
|
1554
|
|
|
1555 recursive.mirrortab = closure->mirrortab;
|
|
|
1556 recursive.check_inherit = 0;
|
|
|
1557 map_char_table (XCHAR_TABLE (Vstandard_syntax_table), range,
|
|
|
1558 cmst_mapfun, &recursive);
|
|
|
1559 }
|
|
|
1560 else
|
|
|
1561 put_char_table (XCHAR_TABLE (closure->mirrortab), range, val);
|
|
|
1562 return 0;
|
|
|
1563 }
|
|
|
1564
|
|
|
1565 static void
|
|
|
1566 update_just_this_syntax_table (struct Lisp_Char_Table *ct)
|
|
|
1567 {
|
|
|
1568 struct chartab_range range;
|
|
|
1569 struct cmst_arg arg;
|
|
185
|
1570
|
|
70
|
1571 arg.mirrortab = ct->mirror_table;
|
|
|
1572 arg.check_inherit = (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1573 && ct != XCHAR_TABLE (Vstandard_syntax_table));
|
|
|
1574 range.type = CHARTAB_RANGE_ALL;
|
|
|
1575 map_char_table (ct, &range, cmst_mapfun, &arg);
|
|
|
1576 }
|
|
|
1577
|
|
|
1578 /* Called from chartab.c when a change is made to a syntax table.
|
|
|
1579 If this is the standard syntax table, we need to recompute
|
|
|
1580 *all* syntax tables (yuck). Otherwise we just recompute this
|
|
|
1581 one. */
|
|
|
1582
|
|
|
1583 void
|
|
|
1584 update_syntax_table (struct Lisp_Char_Table *ct)
|
|
|
1585 {
|
|
|
1586 /* Don't be stymied at startup. */
|
|
|
1587 if (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1588 && ct == XCHAR_TABLE (Vstandard_syntax_table))
|
|
|
1589 {
|
|
|
1590 Lisp_Object syntab;
|
|
|
1591
|
|
|
1592 for (syntab = Vall_syntax_tables; !NILP (syntab);
|
|
|
1593 syntab = XCHAR_TABLE (syntab)->next_table)
|
|
|
1594 update_just_this_syntax_table (XCHAR_TABLE (syntab));
|
|
|
1595 }
|
|
|
1596 else
|
|
|
1597 update_just_this_syntax_table (ct);
|
|
|
1598 }
|
|
|
1599
|
|
0
|
1600
|
|
|
1601 /************************************************************************/
|
|
|
1602 /* initialization */
|
|
|
1603 /************************************************************************/
|
|
|
1604
|
|
|
1605 void
|
|
|
1606 syms_of_syntax (void)
|
|
|
1607 {
|
|
|
1608 defsymbol (&Qsyntax_table_p, "syntax-table-p");
|
|
|
1609
|
|
20
|
1610 DEFSUBR (Fsyntax_table_p);
|
|
|
1611 DEFSUBR (Fsyntax_table);
|
|
|
1612 DEFSUBR (Fstandard_syntax_table);
|
|
|
1613 DEFSUBR (Fcopy_syntax_table);
|
|
|
1614 DEFSUBR (Fset_syntax_table);
|
|
|
1615 DEFSUBR (Fsyntax_designator_chars);
|
|
|
1616 DEFSUBR (Fchar_syntax);
|
|
|
1617 DEFSUBR (Fmatching_paren);
|
|
|
1618 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */
|
|
|
1619 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */
|
|
0
|
1620
|
|
20
|
1621 DEFSUBR (Fforward_word);
|
|
0
|
1622
|
|
20
|
1623 DEFSUBR (Fforward_comment);
|
|
|
1624 DEFSUBR (Fscan_lists);
|
|
|
1625 DEFSUBR (Fscan_sexps);
|
|
|
1626 DEFSUBR (Fbackward_prefix_chars);
|
|
|
1627 DEFSUBR (Fparse_partial_sexp);
|
|
0
|
1628 }
|
|
|
1629
|
|
|
1630 void
|
|
|
1631 vars_of_syntax (void)
|
|
|
1632 {
|
|
|
1633 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /*
|
|
|
1634 Non-nil means `forward-sexp', etc., should treat comments as whitespace.
|
|
|
1635 */ );
|
|
|
1636
|
|
|
1637 words_include_escapes = 0;
|
|
|
1638 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /*
|
|
|
1639 Non-nil means `forward-word', etc., should treat escape chars part of words.
|
|
|
1640 */ );
|
|
|
1641
|
|
|
1642 no_quit_in_re_search = 0;
|
|
|
1643 }
|
|
|
1644
|
|
|
1645 void
|
|
|
1646 complex_vars_of_syntax (void)
|
|
|
1647 {
|
|
|
1648 /* Set this now, so first buffer creation can refer to it. */
|
|
|
1649 /* Make it nil before calling copy-syntax-table
|
|
|
1650 so that copy-syntax-table will know not to try to copy from garbage */
|
|
|
1651 Vstandard_syntax_table = Qnil;
|
|
|
1652 Vstandard_syntax_table = Fcopy_syntax_table (Qnil);
|
|
|
1653 staticpro (&Vstandard_syntax_table);
|
|
|
1654
|
|
|
1655 Vsyntax_designator_chars_string = make_pure_string (syntax_code_spec,
|
|
|
1656 Smax, Qnil, 1);
|
|
|
1657 staticpro (&Vsyntax_designator_chars_string);
|
|
|
1658
|
|
70
|
1659 fill_char_table (XCHAR_TABLE (Vstandard_syntax_table),
|
|
|
1660 make_int (Spunct));
|
|
|
1661
|
|
0
|
1662 {
|
|
70
|
1663 Emchar i;
|
|
|
1664
|
|
|
1665 for (i = 0; i <= 32; i++)
|
|
|
1666 Fput_char_table (make_char (i), make_int ((int) Swhitespace),
|
|
|
1667 Vstandard_syntax_table);
|
|
|
1668 for (i = 127; i <= 159; i++)
|
|
|
1669 Fput_char_table (make_char (i), make_int ((int) Swhitespace),
|
|
|
1670 Vstandard_syntax_table);
|
|
|
1671
|
|
|
1672 for (i = 'a'; i <= 'z'; i++)
|
|
|
1673 Fput_char_table (make_char (i), make_int ((int) Sword),
|
|
|
1674 Vstandard_syntax_table);
|
|
|
1675 for (i = 'A'; i <= 'Z'; i++)
|
|
|
1676 Fput_char_table (make_char (i), make_int ((int) Sword),
|
|
|
1677 Vstandard_syntax_table);
|
|
|
1678 for (i = '0'; i <= '9'; i++)
|
|
|
1679 Fput_char_table (make_char (i), make_int ((int) Sword),
|
|
|
1680 Vstandard_syntax_table);
|
|
|
1681 Fput_char_table (make_char ('$'), make_int ((int) Sword),
|
|
|
1682 Vstandard_syntax_table);
|
|
|
1683 Fput_char_table (make_char ('%'), make_int ((int) Sword),
|
|
|
1684 Vstandard_syntax_table);
|
|
0
|
1685
|
|
70
|
1686 {
|
|
|
1687 Fput_char_table (make_char ('('), Fcons (make_int ((int) Sopen),
|
|
|
1688 make_char (')')),
|
|
|
1689 Vstandard_syntax_table);
|
|
|
1690 Fput_char_table (make_char (')'), Fcons (make_int ((int) Sclose),
|
|
|
1691 make_char ('(')),
|
|
|
1692 Vstandard_syntax_table);
|
|
|
1693 Fput_char_table (make_char ('['), Fcons (make_int ((int) Sopen),
|
|
|
1694 make_char (']')),
|
|
|
1695 Vstandard_syntax_table);
|
|
|
1696 Fput_char_table (make_char (']'), Fcons (make_int ((int) Sclose),
|
|
|
1697 make_char ('[')),
|
|
|
1698 Vstandard_syntax_table);
|
|
|
1699 Fput_char_table (make_char ('{'), Fcons (make_int ((int) Sopen),
|
|
|
1700 make_char ('}')),
|
|
|
1701 Vstandard_syntax_table);
|
|
|
1702 Fput_char_table (make_char ('}'), Fcons (make_int ((int) Sclose),
|
|
|
1703 make_char ('{')),
|
|
|
1704 Vstandard_syntax_table);
|
|
|
1705 }
|
|
|
1706
|
|
|
1707 Fput_char_table (make_char ('"'), make_int ((int) Sstring),
|
|
|
1708 Vstandard_syntax_table);
|
|
|
1709 Fput_char_table (make_char ('\\'), make_int ((int) Sescape),
|
|
|
1710 Vstandard_syntax_table);
|
|
185
|
1711
|
|
70
|
1712 {
|
|
|
1713 CONST char *p;
|
|
|
1714 for (p = "_-+*/&|<>="; *p; p++)
|
|
|
1715 Fput_char_table (make_char (*p), make_int ((int) Ssymbol),
|
|
|
1716 Vstandard_syntax_table);
|
|
|
1717
|
|
|
1718 for (p = ".,;:?!#@~^'`"; *p; p++)
|
|
|
1719 Fput_char_table (make_char (*p), make_int ((int) Spunct),
|
|
|
1720 Vstandard_syntax_table);
|
|
|
1721 }
|
|
0
|
1722 }
|
|
|
1723 }
|
