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