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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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31
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32 /* Here is a comment from Ken'ichi HANDA <handa@etl.go.jp>
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33 explaining the purpose of the Sextword syntax category:
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34
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35 Japanese words are not separated by spaces, which makes finding word
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36 boundaries very difficult. Theoretically it's impossible without
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37 using natural language processing techniques. But, by defining
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38 pseudo-words as below (much simplified for letting you understand it
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39 easily) for Japanese, we can have a convenient forward-word function
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40 for Japanese.
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41
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42 A Japanese word is a sequence of characters that consists of
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43 zero or more Kanji characters followed by zero or more
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44 Hiragana characters.
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45
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46 Then, the problem is that now we can't say that a sequence of
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47 word-constituents makes up a WORD. For instance, both Hiragana "A"
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48 and Kanji "KAN" are word-constituents but the sequence of these two
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49 letters can't be a single word.
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50
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51 So, we introduced Sextword for Japanese letters. A character of
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52 Sextword is a word-constituent but a word boundary may exist between
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53 two such characters. */
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54
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55 /* Mule 2.4 doesn't seem to have Sextword - I'm removing it -- mrb */
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56 /* Recovered by tomo */
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57
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58 Lisp_Object Qsyntax_table_p;
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59
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60 int words_include_escapes;
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61
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62 int parse_sexp_ignore_comments;
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63
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64 /* The following two variables are provided to tell additional information
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65 to the regex routines. We do it this way rather than change the
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66 arguments to re_search_2() in an attempt to maintain some call
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67 compatibility with other versions of the regex code. */
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68
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69 /* Tell the regex routines not to QUIT. Normally there is a QUIT
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70 each iteration in re_search_2(). */
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71 int no_quit_in_re_search;
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72
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73 /* Tell the regex routines which buffer to access for SYNTAX() lookups
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74 and the like. */
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75 struct buffer *regex_emacs_buffer;
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76
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442
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77 /* Tell the regex routines whether buffer is used or not. */
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78 int regex_emacs_buffer_p;
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79
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428
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80 Lisp_Object Vstandard_syntax_table;
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81
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82 Lisp_Object Vsyntax_designator_chars_string;
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83
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84 /* This is the internal form of the parse state used in parse-partial-sexp. */
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85
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86 struct lisp_parse_state
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87 {
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88 int depth; /* Depth at end of parsing */
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89 Emchar instring; /* -1 if not within string, else desired terminator */
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90 int incomment; /* Nonzero if within a comment at end of parsing */
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91 int comstyle; /* comment style a=0, or b=1 */
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92 int quoted; /* Nonzero if just after an escape char at end of
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93 parsing */
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94 Bufpos thislevelstart;/* Char number of most recent start-of-expression
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95 at current level */
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96 Bufpos prevlevelstart;/* Char number of start of containing expression */
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97 Bufpos location; /* Char number at which parsing stopped */
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98 int mindepth; /* Minimum depth seen while scanning */
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99 Bufpos comstart; /* Position just after last comment starter */
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100 };
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101
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102 /* These variables are a cache for finding the start of a defun.
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103 find_start_pos is the place for which the defun start was found.
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104 find_start_value is the defun start position found for it.
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105 find_start_buffer is the buffer it was found in.
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106 find_start_begv is the BEGV value when it was found.
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107 find_start_modiff is the value of MODIFF when it was found. */
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108
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109 static Bufpos find_start_pos;
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110 static Bufpos find_start_value;
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111 static struct buffer *find_start_buffer;
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112 static Bufpos find_start_begv;
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113 static int find_start_modiff;
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114
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115 /* Find a defun-start that is the last one before POS (or nearly the last).
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116 We record what we find, so that another call in the same area
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117 can return the same value right away. */
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118
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119 static Bufpos
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120 find_defun_start (struct buffer *buf, Bufpos pos)
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121 {
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122 Bufpos tem;
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440
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123 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
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428
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124
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125 /* Use previous finding, if it's valid and applies to this inquiry. */
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126 if (buf == find_start_buffer
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127 /* Reuse the defun-start even if POS is a little farther on.
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128 POS might be in the next defun, but that's ok.
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129 Our value may not be the best possible, but will still be usable. */
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130 && pos <= find_start_pos + 1000
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131 && pos >= find_start_value
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132 && BUF_BEGV (buf) == find_start_begv
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133 && BUF_MODIFF (buf) == find_start_modiff)
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134 return find_start_value;
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135
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136 /* Back up to start of line. */
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137 tem = find_next_newline (buf, pos, -1);
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138
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139 while (tem > BUF_BEGV (buf))
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140 {
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141 /* Open-paren at start of line means we found our defun-start. */
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142 if (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, tem)) == Sopen)
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143 break;
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144 /* Move to beg of previous line. */
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145 tem = find_next_newline (buf, tem, -2);
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146 }
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147
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148 /* Record what we found, for the next try. */
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149 find_start_value = tem;
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150 find_start_buffer = buf;
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151 find_start_modiff = BUF_MODIFF (buf);
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152 find_start_begv = BUF_BEGV (buf);
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153 find_start_pos = pos;
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154
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155 return find_start_value;
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156 }
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157
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158 DEFUN ("syntax-table-p", Fsyntax_table_p, 1, 1, 0, /*
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444
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159 Return t if OBJECT is a syntax table.
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428
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160 Any vector of 256 elements will do.
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161 */
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444
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162 (object))
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428
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163 {
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444
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164 return (CHAR_TABLEP (object)
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165 && XCHAR_TABLE_TYPE (object) == CHAR_TABLE_TYPE_SYNTAX)
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428
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166 ? Qt : Qnil;
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167 }
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168
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169 static Lisp_Object
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170 check_syntax_table (Lisp_Object obj, Lisp_Object default_)
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171 {
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172 if (NILP (obj))
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173 obj = default_;
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174 while (NILP (Fsyntax_table_p (obj)))
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175 obj = wrong_type_argument (Qsyntax_table_p, obj);
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176 return obj;
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177 }
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178
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179 DEFUN ("syntax-table", Fsyntax_table, 0, 1, 0, /*
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180 Return the current syntax table.
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181 This is the one specified by the current buffer, or by BUFFER if it
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182 is non-nil.
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183 */
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184 (buffer))
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185 {
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186 return decode_buffer (buffer, 0)->syntax_table;
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187 }
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188
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189 DEFUN ("standard-syntax-table", Fstandard_syntax_table, 0, 0, 0, /*
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190 Return the standard syntax table.
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191 This is the one used for new buffers.
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192 */
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193 ())
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194 {
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195 return Vstandard_syntax_table;
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196 }
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197
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198 DEFUN ("copy-syntax-table", Fcopy_syntax_table, 0, 1, 0, /*
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444
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199 Return a new syntax table which is a copy of SYNTAX-TABLE.
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200 SYNTAX-TABLE defaults to the standard syntax table.
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428
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201 */
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444
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202 (syntax_table))
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428
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203 {
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204 if (NILP (Vstandard_syntax_table))
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205 return Fmake_char_table (Qsyntax);
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206
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444
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207 syntax_table = check_syntax_table (syntax_table, Vstandard_syntax_table);
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208 return Fcopy_char_table (syntax_table);
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428
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209 }
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210
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211 DEFUN ("set-syntax-table", Fset_syntax_table, 1, 2, 0, /*
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444
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212 Select SYNTAX-TABLE as the new syntax table for BUFFER.
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428
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213 BUFFER defaults to the current buffer if omitted.
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214 */
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444
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215 (syntax_table, buffer))
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428
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216 {
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217 struct buffer *buf = decode_buffer (buffer, 0);
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444
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218 syntax_table = check_syntax_table (syntax_table, Qnil);
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219 buf->syntax_table = syntax_table;
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220 buf->mirror_syntax_table = XCHAR_TABLE (syntax_table)->mirror_table;
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428
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221 /* Indicate that this buffer now has a specified syntax table. */
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222 buf->local_var_flags |= XINT (buffer_local_flags.syntax_table);
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444
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223 return syntax_table;
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428
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224 }
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225
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226 /* Convert a letter which signifies a syntax code
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227 into the code it signifies.
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228 This is used by modify-syntax-entry, and other things. */
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229
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442
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230 const unsigned char syntax_spec_code[0400] =
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428
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231 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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232 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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233 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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234 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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235 (char) Swhitespace, 0377, (char) Sstring, 0377,
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236 (char) Smath, 0377, 0377, (char) Squote,
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237 (char) Sopen, (char) Sclose, 0377, 0377,
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238 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote,
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239 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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240 0377, 0377, 0377, 0377,
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241 (char) Scomment, 0377, (char) Sendcomment, 0377,
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242 (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */
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243 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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244 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
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245 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol,
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246 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */
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247 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
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248 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
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249 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377
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250 };
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251
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442
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252 const unsigned char syntax_code_spec[] = " .w_()'\"$\\/<>@";
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428
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253
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254 DEFUN ("syntax-designator-chars", Fsyntax_designator_chars, 0, 0, 0, /*
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255 Return a string of the recognized syntax designator chars.
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256 The chars are ordered by their internal syntax codes, which are
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257 numbered starting at 0.
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258 */
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259 ())
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260 {
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261 return Vsyntax_designator_chars_string;
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262 }
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263
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264 DEFUN ("char-syntax", Fchar_syntax, 1, 2, 0, /*
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444
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265 Return the syntax code of CHARACTER, described by a character.
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266 For example, if CHARACTER is a word constituent,
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267 the character `?w' is returned.
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428
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268 The characters that correspond to various syntax codes
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269 are listed in the documentation of `modify-syntax-entry'.
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444
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270 Optional second argument SYNTAX-TABLE defaults to the current buffer's
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428
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271 syntax table.
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272 */
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444
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273 (character, syntax_table))
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428
|
274 {
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440
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275 Lisp_Char_Table *mirrortab;
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428
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276
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444
|
277 if (NILP (character))
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428
|
278 {
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444
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279 character = make_char ('\000');
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428
|
280 }
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444
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281 CHECK_CHAR_COERCE_INT (character);
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282 syntax_table = check_syntax_table (syntax_table, current_buffer->syntax_table);
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283 mirrortab = XCHAR_TABLE (XCHAR_TABLE (syntax_table)->mirror_table);
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284 return make_char (syntax_code_spec[(int) SYNTAX (mirrortab, XCHAR (character))]);
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428
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285 }
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286
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287 #ifdef MULE
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288
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289 enum syntaxcode
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290 charset_syntax (struct buffer *buf, Lisp_Object charset, int *multi_p_out)
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291 {
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292 *multi_p_out = 1;
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293 /* #### get this right */
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294 return Spunct;
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295 }
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296
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297 #endif
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298
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299 Lisp_Object
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444
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300 syntax_match (Lisp_Object syntax_table, Emchar ch)
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428
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301 {
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444
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302 Lisp_Object code = XCHAR_TABLE_VALUE_UNSAFE (syntax_table, ch);
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428
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303 Lisp_Object code2 = code;
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304
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305 if (CONSP (code))
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306 code2 = XCAR (code);
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307 if (SYNTAX_FROM_CODE (XINT (code2)) == Sinherit)
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442
|
308 code = XCHAR_TABLE_VALUE_UNSAFE (Vstandard_syntax_table, ch);
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428
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309
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310 return CONSP (code) ? XCDR (code) : Qnil;
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311 }
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312
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313 DEFUN ("matching-paren", Fmatching_paren, 1, 2, 0, /*
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444
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314 Return the matching parenthesis of CHARACTER, or nil if none.
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315 Optional second argument SYNTAX-TABLE defaults to the current buffer's
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428
|
316 syntax table.
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|
|
317 */
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444
|
318 (character, syntax_table))
|
|
428
|
319 {
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|
440
|
320 Lisp_Char_Table *mirrortab;
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428
|
321 int code;
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322
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444
|
323 CHECK_CHAR_COERCE_INT (character);
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324 syntax_table = check_syntax_table (syntax_table, current_buffer->syntax_table);
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325 mirrortab = XCHAR_TABLE (XCHAR_TABLE (syntax_table)->mirror_table);
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326 code = SYNTAX (mirrortab, XCHAR (character));
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428
|
327 if (code == Sopen || code == Sclose || code == Sstring)
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|
444
|
328 return syntax_match (syntax_table, XCHAR (character));
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|
428
|
329 return Qnil;
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|
|
330 }
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331
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332
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333
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|
|
334 #ifdef MULE
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335 /* Return 1 if there is a word boundary between two word-constituent
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|
336 characters C1 and C2 if they appear in this order, else return 0.
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|
337 There is no word boundary between two word-constituent ASCII
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|
338 characters. */
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|
339 #define WORD_BOUNDARY_P(c1, c2) \
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|
|
340 (!(CHAR_ASCII_P (c1) && CHAR_ASCII_P (c2)) \
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|
|
341 && word_boundary_p (c1, c2))
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342
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|
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343 extern int word_boundary_p (Emchar c1, Emchar c2);
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|
|
344 #endif
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345
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|
|
346 /* Return the position across COUNT words from FROM.
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|
347 If that many words cannot be found before the end of the buffer, return 0.
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|
|
348 COUNT negative means scan backward and stop at word beginning. */
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|
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349
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|
|
350 Bufpos
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|
|
351 scan_words (struct buffer *buf, Bufpos from, int count)
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|
|
352 {
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|
|
353 Bufpos limit = count > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
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|
440
|
354 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
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|
428
|
355 Emchar ch0, ch1;
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|
|
356 enum syntaxcode code;
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|
|
357
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|
|
358 /* #### is it really worth it to hand expand both cases? JV */
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|
|
359 while (count > 0)
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|
|
360 {
|
|
|
361 QUIT;
|
|
|
362
|
|
|
363 while (1)
|
|
|
364 {
|
|
|
365 if (from == limit)
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|
|
366 return 0;
|
|
|
367
|
|
|
368 ch0 = BUF_FETCH_CHAR (buf, from);
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|
|
369 code = SYNTAX_UNSAFE (mirrortab, ch0);
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|
|
370
|
|
442
|
371 from++;
|
|
428
|
372 if (words_include_escapes
|
|
|
373 && (code == Sescape || code == Scharquote))
|
|
|
374 break;
|
|
|
375 if (code == Sword)
|
|
|
376 break;
|
|
|
377 }
|
|
|
378
|
|
|
379 QUIT;
|
|
|
380
|
|
|
381 while (from != limit)
|
|
|
382 {
|
|
|
383 ch1 = BUF_FETCH_CHAR (buf, from);
|
|
|
384 code = SYNTAX_UNSAFE (mirrortab, ch1);
|
|
|
385 if (!(words_include_escapes
|
|
|
386 && (code == Sescape || code == Scharquote)))
|
|
|
387 if (code != Sword
|
|
|
388 #ifdef MULE
|
|
|
389 || WORD_BOUNDARY_P (ch0, ch1)
|
|
434
|
390 #endif
|
|
428
|
391 )
|
|
|
392 break;
|
|
|
393 #ifdef MULE
|
|
|
394 ch0 = ch1;
|
|
434
|
395 #endif
|
|
428
|
396 from++;
|
|
|
397 }
|
|
|
398 count--;
|
|
|
399 }
|
|
|
400
|
|
|
401 while (count < 0)
|
|
|
402 {
|
|
|
403 QUIT;
|
|
|
404
|
|
|
405 while (1)
|
|
|
406 {
|
|
|
407 if (from == limit)
|
|
|
408 return 0;
|
|
|
409
|
|
|
410 ch1 = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
411 code = SYNTAX_UNSAFE (mirrortab, ch1);
|
|
442
|
412
|
|
|
413 from--;
|
|
428
|
414 if (words_include_escapes
|
|
|
415 && (code == Sescape || code == Scharquote))
|
|
|
416 break;
|
|
|
417 if (code == Sword)
|
|
|
418 break;
|
|
|
419 }
|
|
|
420
|
|
|
421 QUIT;
|
|
|
422
|
|
|
423 while (from != limit)
|
|
|
424 {
|
|
|
425 ch0 = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
426 code = SYNTAX_UNSAFE (mirrortab, ch0);
|
|
|
427 if (!(words_include_escapes
|
|
|
428 && (code == Sescape || code == Scharquote)))
|
|
|
429 if (code != Sword
|
|
|
430 #ifdef MULE
|
|
|
431 || WORD_BOUNDARY_P (ch0, ch1)
|
|
|
432 #endif
|
|
|
433 )
|
|
|
434 break;
|
|
|
435 #ifdef MULE
|
|
|
436 ch1 = ch0;
|
|
|
437 #endif
|
|
|
438 from--;
|
|
|
439 }
|
|
|
440 count++;
|
|
|
441 }
|
|
|
442
|
|
|
443 return from;
|
|
|
444 }
|
|
|
445
|
|
446
|
446 DEFUN ("forward-word", Fforward_word, 0, 2, "_p", /*
|
|
428
|
447 Move point forward COUNT words (backward if COUNT is negative).
|
|
446
|
448 Normally t is returned, but if an edge of the buffer is reached,
|
|
|
449 point is left there and nil is returned.
|
|
428
|
450
|
|
446
|
451 COUNT defaults to 1, and BUFFER defaults to the current buffer.
|
|
428
|
452 */
|
|
|
453 (count, buffer))
|
|
|
454 {
|
|
|
455 Bufpos val;
|
|
|
456 struct buffer *buf = decode_buffer (buffer, 0);
|
|
446
|
457 EMACS_INT n;
|
|
|
458
|
|
|
459 if (NILP (count))
|
|
|
460 n = 1;
|
|
|
461 else
|
|
|
462 {
|
|
|
463 CHECK_INT (count);
|
|
|
464 n = XINT (count);
|
|
|
465 }
|
|
428
|
466
|
|
446
|
467 val = scan_words (buf, BUF_PT (buf), n);
|
|
|
468 if (val)
|
|
428
|
469 {
|
|
446
|
470 BUF_SET_PT (buf, val);
|
|
|
471 return Qt;
|
|
|
472 }
|
|
|
473 else
|
|
|
474 {
|
|
|
475 BUF_SET_PT (buf, n > 0 ? BUF_ZV (buf) : BUF_BEGV (buf));
|
|
428
|
476 return Qnil;
|
|
|
477 }
|
|
|
478 }
|
|
|
479
|
|
|
480 static void scan_sexps_forward (struct buffer *buf,
|
|
|
481 struct lisp_parse_state *,
|
|
|
482 Bufpos from, Bufpos end,
|
|
|
483 int targetdepth, int stopbefore,
|
|
|
484 Lisp_Object oldstate,
|
|
|
485 int commentstop);
|
|
|
486
|
|
|
487 static int
|
|
|
488 find_start_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
489 {
|
|
|
490 Emchar c;
|
|
|
491 enum syntaxcode code;
|
|
440
|
492 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
493
|
|
|
494 /* Look back, counting the parity of string-quotes,
|
|
|
495 and recording the comment-starters seen.
|
|
|
496 When we reach a safe place, assume that's not in a string;
|
|
|
497 then step the main scan to the earliest comment-starter seen
|
|
|
498 an even number of string quotes away from the safe place.
|
|
|
499
|
|
|
500 OFROM[I] is position of the earliest comment-starter seen
|
|
|
501 which is I+2X quotes from the comment-end.
|
|
|
502 PARITY is current parity of quotes from the comment end. */
|
|
|
503 int parity = 0;
|
|
|
504 Emchar my_stringend = 0;
|
|
|
505 int string_lossage = 0;
|
|
|
506 Bufpos comment_end = from;
|
|
|
507 Bufpos comstart_pos = 0;
|
|
|
508 int comstart_parity = 0;
|
|
|
509 int styles_match_p = 0;
|
|
|
510
|
|
|
511 /* At beginning of range to scan, we're outside of strings;
|
|
|
512 that determines quote parity to the comment-end. */
|
|
|
513 while (from != stop)
|
|
|
514 {
|
|
|
515 /* Move back and examine a character. */
|
|
|
516 from--;
|
|
|
517
|
|
|
518 c = BUF_FETCH_CHAR (buf, from);
|
|
|
519 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
520
|
|
|
521 /* is this a 1-char comment end sequence? if so, try
|
|
|
522 to see if style matches previously extracted mask */
|
|
|
523 if (code == Sendcomment)
|
|
|
524 {
|
|
|
525 styles_match_p = SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask);
|
|
|
526 }
|
|
|
527
|
|
|
528 /* otherwise, is this a 2-char comment end sequence? */
|
|
|
529 else if (from >= stop
|
|
|
530 && SYNTAX_END_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
|
531 {
|
|
|
532 code = Sendcomment;
|
|
|
533 styles_match_p =
|
|
|
534 SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
|
535 BUF_FETCH_CHAR (buf, from+1),
|
|
|
536 mask);
|
|
|
537 }
|
|
|
538
|
|
|
539 /* or are we looking at a 1-char comment start sequence
|
|
|
540 of the style matching mask? */
|
|
|
541 else if (code == Scomment
|
|
|
542 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
|
543 {
|
|
|
544 styles_match_p = 1;
|
|
|
545 }
|
|
|
546
|
|
|
547 /* or possibly, a 2-char comment start sequence */
|
|
|
548 else if (from >= stop
|
|
|
549 && SYNTAX_STYLES_MATCH_START_P (mirrortab, c,
|
|
|
550 BUF_FETCH_CHAR (buf, from+1),
|
|
|
551 mask))
|
|
|
552 {
|
|
|
553 code = Scomment;
|
|
|
554 styles_match_p = 1;
|
|
|
555 }
|
|
|
556
|
|
|
557 /* Ignore escaped characters. */
|
|
|
558 if (char_quoted (buf, from))
|
|
|
559 continue;
|
|
|
560
|
|
|
561 /* Track parity of quotes. */
|
|
|
562 if (code == Sstring)
|
|
|
563 {
|
|
|
564 parity ^= 1;
|
|
|
565 if (my_stringend == 0)
|
|
|
566 my_stringend = c;
|
|
|
567 /* If we have two kinds of string delimiters.
|
|
|
568 There's no way to grok this scanning backwards. */
|
|
|
569 else if (my_stringend != c)
|
|
|
570 string_lossage = 1;
|
|
|
571 }
|
|
|
572
|
|
|
573 /* Record comment-starters according to that
|
|
|
574 quote-parity to the comment-end. */
|
|
|
575 if (code == Scomment && styles_match_p)
|
|
|
576 {
|
|
|
577 comstart_parity = parity;
|
|
|
578 comstart_pos = from;
|
|
|
579 }
|
|
|
580
|
|
|
581 /* If we find another earlier comment-ender,
|
|
|
582 any comment-starts earlier than that don't count
|
|
|
583 (because they go with the earlier comment-ender). */
|
|
|
584 if (code == Sendcomment && styles_match_p)
|
|
|
585 break;
|
|
|
586
|
|
|
587 /* Assume a defun-start point is outside of strings. */
|
|
|
588 if (code == Sopen
|
|
|
589 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n'))
|
|
|
590 break;
|
|
|
591 }
|
|
|
592
|
|
|
593 if (comstart_pos == 0)
|
|
|
594 from = comment_end;
|
|
|
595 /* If the earliest comment starter
|
|
|
596 is followed by uniform paired string quotes or none,
|
|
|
597 we know it can't be inside a string
|
|
|
598 since if it were then the comment ender would be inside one.
|
|
|
599 So it does start a comment. Skip back to it. */
|
|
|
600 else if (comstart_parity == 0 && !string_lossage)
|
|
|
601 from = comstart_pos;
|
|
|
602 else
|
|
|
603 {
|
|
|
604 /* We had two kinds of string delimiters mixed up
|
|
|
605 together. Decode this going forwards.
|
|
|
606 Scan fwd from the previous comment ender
|
|
|
607 to the one in question; this records where we
|
|
|
608 last passed a comment starter. */
|
|
|
609
|
|
|
610 struct lisp_parse_state state;
|
|
|
611 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end),
|
|
|
612 comment_end - 1, -10000, 0, Qnil, 0);
|
|
|
613 if (state.incomment)
|
|
|
614 from = state.comstart;
|
|
|
615 else
|
|
|
616 /* We can't grok this as a comment; scan it normally. */
|
|
|
617 from = comment_end;
|
|
|
618 }
|
|
|
619 return from;
|
|
|
620 }
|
|
|
621
|
|
|
622 static Bufpos
|
|
|
623 find_end_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
624 {
|
|
|
625 int c;
|
|
440
|
626 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
627
|
|
|
628 while (1)
|
|
|
629 {
|
|
|
630 if (from == stop)
|
|
|
631 {
|
|
|
632 return -1;
|
|
|
633 }
|
|
|
634 c = BUF_FETCH_CHAR (buf, from);
|
|
|
635 if (SYNTAX_UNSAFE (mirrortab, c) == Sendcomment
|
|
|
636 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
|
637 /* we have encountered a comment end of the same style
|
|
|
638 as the comment sequence which began this comment
|
|
|
639 section */
|
|
|
640 break;
|
|
|
641
|
|
|
642 from++;
|
|
|
643 if (from < stop
|
|
|
644 && SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
|
645 BUF_FETCH_CHAR (buf, from), mask))
|
|
|
646 /* we have encountered a comment end of the same style
|
|
|
647 as the comment sequence which began this comment
|
|
|
648 section */
|
|
|
649 { from++; break; }
|
|
|
650 }
|
|
|
651 return from;
|
|
|
652 }
|
|
|
653
|
|
|
654
|
|
|
655 /* #### between FSF 19.23 and 19.28 there are some changes to the logic
|
|
|
656 in this function (and minor changes to find_start_of_comment(),
|
|
|
657 above, which is part of Fforward_comment() in FSF). Attempts to port
|
|
|
658 that logic made this function break, so I'm leaving it out. If anyone
|
|
|
659 ever complains about this function not working properly, take a look
|
|
|
660 at those changes. --ben */
|
|
|
661
|
|
446
|
662 DEFUN ("forward-comment", Fforward_comment, 0, 2, 0, /*
|
|
444
|
663 Move forward across up to COUNT comments, or backwards if COUNT is negative.
|
|
428
|
664 Stop scanning if we find something other than a comment or whitespace.
|
|
|
665 Set point to where scanning stops.
|
|
444
|
666 If COUNT comments are found as expected, with nothing except whitespace
|
|
428
|
667 between them, return t; otherwise return nil.
|
|
|
668 Point is set in either case.
|
|
446
|
669 COUNT defaults to 1, and BUFFER defaults to the current buffer.
|
|
428
|
670 */
|
|
444
|
671 (count, buffer))
|
|
428
|
672 {
|
|
|
673 Bufpos from;
|
|
|
674 Bufpos stop;
|
|
|
675 Emchar c;
|
|
|
676 enum syntaxcode code;
|
|
444
|
677 EMACS_INT n;
|
|
428
|
678 struct buffer *buf = decode_buffer (buffer, 0);
|
|
440
|
679 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
680
|
|
446
|
681 if (NILP (count))
|
|
|
682 n = 1;
|
|
|
683 else
|
|
|
684 {
|
|
|
685 CHECK_INT (count);
|
|
|
686 n = XINT (count);
|
|
|
687 }
|
|
428
|
688
|
|
|
689 from = BUF_PT (buf);
|
|
|
690
|
|
444
|
691 while (n > 0)
|
|
428
|
692 {
|
|
|
693 QUIT;
|
|
|
694
|
|
|
695 stop = BUF_ZV (buf);
|
|
|
696 while (from < stop)
|
|
|
697 {
|
|
|
698 int mask = 0; /* mask for finding matching comment style */
|
|
|
699
|
|
|
700 if (char_quoted (buf, from))
|
|
|
701 {
|
|
|
702 from++;
|
|
|
703 continue;
|
|
|
704 }
|
|
|
705
|
|
|
706 c = BUF_FETCH_CHAR (buf, from);
|
|
|
707 code = SYNTAX (mirrortab, c);
|
|
|
708
|
|
|
709 if (code == Scomment)
|
|
|
710 {
|
|
|
711 /* we have encountered a single character comment start
|
|
|
712 sequence, and we are ignoring all text inside comments.
|
|
|
713 we must record the comment style this character begins
|
|
|
714 so that later, only a comment end of the same style actually
|
|
|
715 ends the comment section */
|
|
|
716 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
717 }
|
|
|
718
|
|
|
719 else if (from < stop
|
|
|
720 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
|
721 {
|
|
|
722 /* we have encountered a 2char comment start sequence and we
|
|
|
723 are ignoring all text inside comments. we must record
|
|
|
724 the comment style this sequence begins so that later,
|
|
|
725 only a comment end of the same style actually ends
|
|
|
726 the comment section */
|
|
|
727 code = Scomment;
|
|
|
728 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
|
729 BUF_FETCH_CHAR (buf, from+1));
|
|
|
730 from++;
|
|
|
731 }
|
|
|
732
|
|
|
733 if (code == Scomment)
|
|
|
734 {
|
|
|
735 Bufpos newfrom;
|
|
|
736
|
|
|
737 newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
738 if (newfrom < 0)
|
|
|
739 {
|
|
|
740 /* we stopped because from==stop */
|
|
|
741 BUF_SET_PT (buf, stop);
|
|
|
742 return Qnil;
|
|
|
743 }
|
|
|
744 from = newfrom;
|
|
|
745
|
|
|
746 /* We have skipped one comment. */
|
|
|
747 break;
|
|
|
748 }
|
|
|
749 else if (code != Swhitespace
|
|
|
750 && code != Sendcomment
|
|
|
751 && code != Scomment )
|
|
|
752 {
|
|
|
753 BUF_SET_PT (buf, from);
|
|
|
754 return Qnil;
|
|
|
755 }
|
|
|
756 from++;
|
|
|
757 }
|
|
|
758
|
|
|
759 /* End of comment reached */
|
|
444
|
760 n--;
|
|
428
|
761 }
|
|
|
762
|
|
444
|
763 while (n < 0)
|
|
428
|
764 {
|
|
|
765 QUIT;
|
|
|
766
|
|
|
767 stop = BUF_BEGV (buf);
|
|
|
768 while (from > stop)
|
|
|
769 {
|
|
|
770 int mask = 0; /* mask for finding matching comment style */
|
|
|
771
|
|
|
772 from--;
|
|
|
773 if (char_quoted (buf, from))
|
|
|
774 {
|
|
|
775 from--;
|
|
|
776 continue;
|
|
|
777 }
|
|
|
778
|
|
|
779 c = BUF_FETCH_CHAR (buf, from);
|
|
|
780 code = SYNTAX (mirrortab, c);
|
|
|
781
|
|
|
782 if (code == Sendcomment)
|
|
|
783 {
|
|
|
784 /* we have found a single char end comment. we must record
|
|
|
785 the comment style encountered so that later, we can match
|
|
|
786 only the proper comment begin sequence of the same style */
|
|
|
787 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
788 }
|
|
|
789
|
|
|
790 else if (from > stop
|
|
|
791 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from - 1), c)
|
|
|
792 && !char_quoted (buf, from - 1))
|
|
|
793 {
|
|
|
794 /* We must record the comment style encountered so that
|
|
|
795 later, we can match only the proper comment begin
|
|
|
796 sequence of the same style. */
|
|
|
797 code = Sendcomment;
|
|
|
798 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
|
799 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
800 c);
|
|
|
801 from--;
|
|
|
802 }
|
|
|
803
|
|
|
804 if (code == Sendcomment)
|
|
|
805 {
|
|
|
806 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
807 break;
|
|
|
808 }
|
|
|
809
|
|
|
810 else if (code != Swhitespace
|
|
|
811 && SYNTAX (mirrortab, c) != Scomment
|
|
|
812 && SYNTAX (mirrortab, c) != Sendcomment)
|
|
|
813 {
|
|
|
814 BUF_SET_PT (buf, from + 1);
|
|
|
815 return Qnil;
|
|
|
816 }
|
|
|
817 }
|
|
|
818
|
|
444
|
819 n++;
|
|
428
|
820 }
|
|
|
821
|
|
|
822 BUF_SET_PT (buf, from);
|
|
|
823 return Qt;
|
|
|
824 }
|
|
|
825
|
|
|
826
|
|
|
827 Lisp_Object
|
|
|
828 scan_lists (struct buffer *buf, Bufpos from, int count, int depth,
|
|
444
|
829 int sexpflag, int noerror)
|
|
428
|
830 {
|
|
|
831 Bufpos stop;
|
|
|
832 Emchar c;
|
|
|
833 int quoted;
|
|
|
834 int mathexit = 0;
|
|
|
835 enum syntaxcode code;
|
|
|
836 int min_depth = depth; /* Err out if depth gets less than this. */
|
|
|
837 Lisp_Object syntaxtab = buf->syntax_table;
|
|
440
|
838 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
839
|
|
|
840 if (depth > 0) min_depth = 0;
|
|
|
841
|
|
|
842 while (count > 0)
|
|
|
843 {
|
|
|
844 QUIT;
|
|
|
845
|
|
|
846 stop = BUF_ZV (buf);
|
|
|
847 while (from < stop)
|
|
|
848 {
|
|
|
849 int mask = 0; /* mask for finding matching comment style */
|
|
|
850
|
|
|
851 c = BUF_FETCH_CHAR (buf, from);
|
|
|
852 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
853 from++;
|
|
|
854
|
|
|
855 /* a 1-char comment start sequence */
|
|
|
856 if (code == Scomment && parse_sexp_ignore_comments)
|
|
|
857 {
|
|
|
858 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
859 }
|
|
|
860
|
|
|
861 /* else, a 2-char comment start sequence? */
|
|
|
862 else if (from < stop
|
|
|
863 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from))
|
|
|
864 && parse_sexp_ignore_comments)
|
|
|
865 {
|
|
|
866 /* we have encountered a comment start sequence and we
|
|
|
867 are ignoring all text inside comments. we must record
|
|
|
868 the comment style this sequence begins so that later,
|
|
|
869 only a comment end of the same style actually ends
|
|
|
870 the comment section */
|
|
|
871 code = Scomment;
|
|
|
872 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
|
873 BUF_FETCH_CHAR (buf, from));
|
|
|
874 from++;
|
|
|
875 }
|
|
|
876
|
|
|
877 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
|
878 continue;
|
|
|
879
|
|
|
880 switch (code)
|
|
|
881 {
|
|
|
882 case Sescape:
|
|
|
883 case Scharquote:
|
|
|
884 if (from == stop) goto lose;
|
|
|
885 from++;
|
|
|
886 /* treat following character as a word constituent */
|
|
|
887 case Sword:
|
|
|
888 case Ssymbol:
|
|
|
889 if (depth || !sexpflag) break;
|
|
|
890 /* This word counts as a sexp; return at end of it. */
|
|
|
891 while (from < stop)
|
|
|
892 {
|
|
|
893 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
894 {
|
|
|
895 case Scharquote:
|
|
|
896 case Sescape:
|
|
|
897 from++;
|
|
|
898 if (from == stop) goto lose;
|
|
|
899 break;
|
|
|
900 case Sword:
|
|
|
901 case Ssymbol:
|
|
|
902 case Squote:
|
|
|
903 break;
|
|
|
904 default:
|
|
|
905 goto done;
|
|
|
906 }
|
|
|
907 from++;
|
|
|
908 }
|
|
|
909 goto done;
|
|
|
910
|
|
|
911 case Scomment:
|
|
|
912 if (!parse_sexp_ignore_comments)
|
|
|
913 break;
|
|
|
914 {
|
|
|
915 Bufpos newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
916 if (newfrom < 0)
|
|
|
917 {
|
|
|
918 /* we stopped because from == stop in search forward */
|
|
|
919 from = stop;
|
|
|
920 if (depth == 0)
|
|
|
921 goto done;
|
|
|
922 goto lose;
|
|
|
923 }
|
|
|
924 from = newfrom;
|
|
|
925 }
|
|
|
926 break;
|
|
|
927
|
|
|
928 case Smath:
|
|
|
929 if (!sexpflag)
|
|
|
930 break;
|
|
|
931 if (from != stop && c == BUF_FETCH_CHAR (buf, from))
|
|
|
932 from++;
|
|
|
933 if (mathexit)
|
|
|
934 {
|
|
|
935 mathexit = 0;
|
|
|
936 goto close1;
|
|
|
937 }
|
|
|
938 mathexit = 1;
|
|
|
939
|
|
|
940 case Sopen:
|
|
|
941 if (!++depth) goto done;
|
|
|
942 break;
|
|
|
943
|
|
|
944 case Sclose:
|
|
|
945 close1:
|
|
|
946 if (!--depth) goto done;
|
|
|
947 if (depth < min_depth)
|
|
|
948 {
|
|
444
|
949 if (noerror)
|
|
428
|
950 return Qnil;
|
|
|
951 error ("Containing expression ends prematurely");
|
|
|
952 }
|
|
|
953 break;
|
|
|
954
|
|
|
955 case Sstring:
|
|
|
956 {
|
|
|
957 /* XEmacs change: call syntax_match on character */
|
|
|
958 Emchar ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
959 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
960 Emchar stringterm;
|
|
|
961
|
|
|
962 if (CHARP (stermobj))
|
|
|
963 stringterm = XCHAR (stermobj);
|
|
|
964 else
|
|
|
965 stringterm = ch;
|
|
|
966
|
|
|
967 while (1)
|
|
|
968 {
|
|
|
969 if (from >= stop)
|
|
|
970 goto lose;
|
|
|
971 if (BUF_FETCH_CHAR (buf, from) == stringterm)
|
|
|
972 break;
|
|
|
973 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
974 {
|
|
|
975 case Scharquote:
|
|
|
976 case Sescape:
|
|
|
977 from++;
|
|
|
978 break;
|
|
|
979 default:
|
|
|
980 break;
|
|
|
981 }
|
|
|
982 from++;
|
|
|
983 }
|
|
|
984 from++;
|
|
|
985 if (!depth && sexpflag) goto done;
|
|
|
986 break;
|
|
|
987 }
|
|
|
988
|
|
|
989 default:
|
|
|
990 break;
|
|
|
991 }
|
|
|
992 }
|
|
|
993
|
|
|
994 /* Reached end of buffer. Error if within object,
|
|
|
995 return nil if between */
|
|
|
996 if (depth) goto lose;
|
|
|
997
|
|
|
998 return Qnil;
|
|
|
999
|
|
|
1000 /* End of object reached */
|
|
|
1001 done:
|
|
|
1002 count--;
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 while (count < 0)
|
|
|
1006 {
|
|
|
1007 QUIT;
|
|
|
1008
|
|
|
1009 stop = BUF_BEGV (buf);
|
|
|
1010 while (from > stop)
|
|
|
1011 {
|
|
|
1012 int mask = 0; /* mask for finding matching comment style */
|
|
|
1013
|
|
|
1014 from--;
|
|
|
1015 quoted = char_quoted (buf, from);
|
|
|
1016 if (quoted)
|
|
|
1017 from--;
|
|
|
1018
|
|
|
1019 c = BUF_FETCH_CHAR (buf, from);
|
|
|
1020 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
1021
|
|
|
1022 if (code == Sendcomment && parse_sexp_ignore_comments)
|
|
|
1023 {
|
|
|
1024 /* we have found a single char end comment. we must record
|
|
|
1025 the comment style encountered so that later, we can match
|
|
|
1026 only the proper comment begin sequence of the same style */
|
|
|
1027 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 else if (from > stop
|
|
|
1031 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from-1), c)
|
|
|
1032 && !char_quoted (buf, from - 1)
|
|
|
1033 && parse_sexp_ignore_comments)
|
|
|
1034 {
|
|
|
1035 /* we must record the comment style encountered so that
|
|
|
1036 later, we can match only the proper comment begin
|
|
|
1037 sequence of the same style */
|
|
|
1038 code = Sendcomment;
|
|
|
1039 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
|
1040 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
1041 c);
|
|
|
1042 from--;
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
|
1046 continue;
|
|
|
1047
|
|
434
|
1048 switch (quoted ? Sword : code)
|
|
428
|
1049 {
|
|
|
1050 case Sword:
|
|
|
1051 case Ssymbol:
|
|
|
1052 if (depth || !sexpflag) break;
|
|
|
1053 /* This word counts as a sexp; count object finished after
|
|
|
1054 passing it. */
|
|
|
1055 while (from > stop)
|
|
|
1056 {
|
|
|
1057 enum syntaxcode syncode;
|
|
|
1058 quoted = char_quoted (buf, from - 1);
|
|
|
1059
|
|
|
1060 if (quoted)
|
|
|
1061 from--;
|
|
|
1062 if (! (quoted
|
|
|
1063 || (syncode =
|
|
|
1064 SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
|
1065 == Sword
|
|
|
1066 || syncode == Ssymbol
|
|
|
1067 || syncode == Squote))
|
|
|
1068 goto done2;
|
|
|
1069 from--;
|
|
|
1070 }
|
|
|
1071 goto done2;
|
|
|
1072
|
|
|
1073 case Smath:
|
|
|
1074 if (!sexpflag)
|
|
|
1075 break;
|
|
|
1076 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1077 from--;
|
|
|
1078 if (mathexit)
|
|
|
1079 {
|
|
|
1080 mathexit = 0;
|
|
|
1081 goto open2;
|
|
|
1082 }
|
|
|
1083 mathexit = 1;
|
|
|
1084
|
|
|
1085 case Sclose:
|
|
|
1086 if (!++depth) goto done2;
|
|
|
1087 break;
|
|
|
1088
|
|
|
1089 case Sopen:
|
|
|
1090 open2:
|
|
|
1091 if (!--depth) goto done2;
|
|
|
1092 if (depth < min_depth)
|
|
|
1093 {
|
|
444
|
1094 if (noerror)
|
|
428
|
1095 return Qnil;
|
|
|
1096 error ("Containing expression ends prematurely");
|
|
|
1097 }
|
|
|
1098 break;
|
|
|
1099
|
|
|
1100 case Sendcomment:
|
|
|
1101 if (parse_sexp_ignore_comments)
|
|
|
1102 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
1103 break;
|
|
|
1104
|
|
|
1105 case Sstring:
|
|
|
1106 {
|
|
|
1107 /* XEmacs change: call syntax_match() on character */
|
|
|
1108 Emchar ch = BUF_FETCH_CHAR (buf, from);
|
|
|
1109 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
1110 Emchar stringterm;
|
|
|
1111
|
|
|
1112 if (CHARP (stermobj))
|
|
|
1113 stringterm = XCHAR (stermobj);
|
|
|
1114 else
|
|
|
1115 stringterm = ch;
|
|
|
1116
|
|
|
1117 while (1)
|
|
|
1118 {
|
|
|
1119 if (from == stop) goto lose;
|
|
|
1120 if (!char_quoted (buf, from - 1)
|
|
|
1121 && stringterm == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1122 break;
|
|
|
1123 from--;
|
|
|
1124 }
|
|
|
1125 from--;
|
|
|
1126 if (!depth && sexpflag) goto done2;
|
|
|
1127 break;
|
|
|
1128 }
|
|
|
1129 }
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 /* Reached start of buffer. Error if within object,
|
|
|
1133 return nil if between */
|
|
|
1134 if (depth) goto lose;
|
|
|
1135
|
|
|
1136 return Qnil;
|
|
|
1137
|
|
|
1138 done2:
|
|
|
1139 count++;
|
|
|
1140 }
|
|
|
1141
|
|
|
1142
|
|
|
1143 return (make_int (from));
|
|
|
1144
|
|
|
1145 lose:
|
|
444
|
1146 if (!noerror)
|
|
428
|
1147 error ("Unbalanced parentheses");
|
|
|
1148 return Qnil;
|
|
|
1149 }
|
|
|
1150
|
|
|
1151 int
|
|
|
1152 char_quoted (struct buffer *buf, Bufpos pos)
|
|
|
1153 {
|
|
|
1154 enum syntaxcode code;
|
|
|
1155 Bufpos beg = BUF_BEGV (buf);
|
|
|
1156 int quoted = 0;
|
|
440
|
1157 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1158
|
|
|
1159 while (pos > beg
|
|
|
1160 && ((code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)))
|
|
|
1161 == Scharquote
|
|
|
1162 || code == Sescape))
|
|
|
1163 pos--, quoted = !quoted;
|
|
|
1164 return quoted;
|
|
|
1165 }
|
|
|
1166
|
|
|
1167 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /*
|
|
|
1168 Scan from character number FROM by COUNT lists.
|
|
|
1169 Returns the character number of the position thus found.
|
|
|
1170
|
|
|
1171 If DEPTH is nonzero, paren depth begins counting from that value,
|
|
|
1172 only places where the depth in parentheses becomes zero
|
|
|
1173 are candidates for stopping; COUNT such places are counted.
|
|
|
1174 Thus, a positive value for DEPTH means go out levels.
|
|
|
1175
|
|
|
1176 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1177
|
|
|
1178 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1179 and the depth is wrong, an error is signaled.
|
|
|
1180 If the depth is right but the count is not used up, nil is returned.
|
|
|
1181
|
|
|
1182 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1183 of in the current buffer.
|
|
|
1184
|
|
|
1185 If optional arg NOERROR is non-nil, scan-lists will return nil instead of
|
|
|
1186 signalling an error.
|
|
|
1187 */
|
|
444
|
1188 (from, count, depth, buffer, noerror))
|
|
428
|
1189 {
|
|
|
1190 struct buffer *buf;
|
|
|
1191
|
|
|
1192 CHECK_INT (from);
|
|
|
1193 CHECK_INT (count);
|
|
|
1194 CHECK_INT (depth);
|
|
|
1195 buf = decode_buffer (buffer, 0);
|
|
|
1196
|
|
|
1197 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0,
|
|
444
|
1198 !NILP (noerror));
|
|
428
|
1199 }
|
|
|
1200
|
|
|
1201 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /*
|
|
|
1202 Scan from character number FROM by COUNT balanced expressions.
|
|
|
1203 If COUNT is negative, scan backwards.
|
|
|
1204 Returns the character number of the position thus found.
|
|
|
1205
|
|
|
1206 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1207
|
|
|
1208 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1209 in the middle of a parenthetical grouping, an error is signaled.
|
|
|
1210 If the beginning or end is reached between groupings
|
|
|
1211 but before count is used up, nil is returned.
|
|
|
1212
|
|
|
1213 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1214 of in the current buffer.
|
|
|
1215
|
|
|
1216 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of
|
|
|
1217 signalling an error.
|
|
|
1218 */
|
|
444
|
1219 (from, count, buffer, noerror))
|
|
428
|
1220 {
|
|
|
1221 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1222 CHECK_INT (from);
|
|
|
1223 CHECK_INT (count);
|
|
|
1224
|
|
444
|
1225 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (noerror));
|
|
428
|
1226 }
|
|
|
1227
|
|
|
1228 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /*
|
|
|
1229 Move point backward over any number of chars with prefix syntax.
|
|
|
1230 This includes chars with "quote" or "prefix" syntax (' or p).
|
|
|
1231
|
|
|
1232 Optional arg BUFFER defaults to the current buffer.
|
|
|
1233 */
|
|
|
1234 (buffer))
|
|
|
1235 {
|
|
|
1236 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1237 Bufpos beg = BUF_BEGV (buf);
|
|
|
1238 Bufpos pos = BUF_PT (buf);
|
|
440
|
1239 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1240
|
|
|
1241 while (pos > beg && !char_quoted (buf, pos - 1)
|
|
|
1242 && (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)) == Squote
|
|
|
1243 || SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1))))
|
|
|
1244 pos--;
|
|
|
1245
|
|
|
1246 BUF_SET_PT (buf, pos);
|
|
|
1247
|
|
|
1248 return Qnil;
|
|
|
1249 }
|
|
|
1250
|
|
|
1251 /* Parse forward from FROM to END,
|
|
|
1252 assuming that FROM has state OLDSTATE (nil means FROM is start of function),
|
|
|
1253 and return a description of the state of the parse at END.
|
|
|
1254 If STOPBEFORE is nonzero, stop at the start of an atom.
|
|
|
1255 If COMMENTSTOP is nonzero, stop at the start of a comment. */
|
|
|
1256
|
|
|
1257 static void
|
|
|
1258 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr,
|
|
|
1259 Bufpos from, Bufpos end,
|
|
|
1260 int targetdepth, int stopbefore,
|
|
|
1261 Lisp_Object oldstate,
|
|
|
1262 int commentstop)
|
|
|
1263 {
|
|
|
1264 struct lisp_parse_state state;
|
|
|
1265
|
|
|
1266 enum syntaxcode code;
|
|
|
1267 struct level { int last, prev; };
|
|
|
1268 struct level levelstart[100];
|
|
|
1269 struct level *curlevel = levelstart;
|
|
|
1270 struct level *endlevel = levelstart + 100;
|
|
|
1271 int depth; /* Paren depth of current scanning location.
|
|
|
1272 level - levelstart equals this except
|
|
|
1273 when the depth becomes negative. */
|
|
|
1274 int mindepth; /* Lowest DEPTH value seen. */
|
|
|
1275 int start_quoted = 0; /* Nonzero means starting after a char quote */
|
|
|
1276 Lisp_Object tem;
|
|
|
1277 int mask; /* comment mask */
|
|
|
1278 Lisp_Object syntaxtab = buf->syntax_table;
|
|
440
|
1279 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1280
|
|
|
1281 if (NILP (oldstate))
|
|
|
1282 {
|
|
|
1283 depth = 0;
|
|
|
1284 state.instring = -1;
|
|
|
1285 state.incomment = 0;
|
|
|
1286 state.comstyle = 0; /* comment style a by default */
|
|
|
1287 mask = SYNTAX_COMMENT_STYLE_A;
|
|
|
1288 }
|
|
|
1289 else
|
|
|
1290 {
|
|
|
1291 tem = Fcar (oldstate); /* elt 0, depth */
|
|
|
1292 if (!NILP (tem))
|
|
|
1293 depth = XINT (tem);
|
|
|
1294 else
|
|
|
1295 depth = 0;
|
|
|
1296
|
|
|
1297 oldstate = Fcdr (oldstate);
|
|
|
1298 oldstate = Fcdr (oldstate);
|
|
|
1299 oldstate = Fcdr (oldstate);
|
|
|
1300 tem = Fcar (oldstate); /* elt 3, instring */
|
|
|
1301 state.instring = !NILP (tem) ? XINT (tem) : -1;
|
|
|
1302
|
|
|
1303 oldstate = Fcdr (oldstate); /* elt 4, incomment */
|
|
|
1304 tem = Fcar (oldstate);
|
|
|
1305 state.incomment = !NILP (tem);
|
|
|
1306
|
|
|
1307 oldstate = Fcdr (oldstate);
|
|
|
1308 tem = Fcar (oldstate); /* elt 5, follows-quote */
|
|
|
1309 start_quoted = !NILP (tem);
|
|
|
1310
|
|
|
1311 /* if the eighth element of the list is nil, we are in comment style
|
|
|
1312 a. if it is non-nil, we are in comment style b */
|
|
|
1313 oldstate = Fcdr (oldstate);
|
|
|
1314 oldstate = Fcdr (oldstate);
|
|
|
1315 oldstate = Fcdr (oldstate);
|
|
|
1316 tem = Fcar (oldstate); /* elt 8, comment style a */
|
|
|
1317 state.comstyle = !NILP (tem);
|
|
|
1318 mask = state.comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A;
|
|
|
1319 }
|
|
|
1320 state.quoted = 0;
|
|
|
1321 mindepth = depth;
|
|
|
1322
|
|
|
1323 curlevel->prev = -1;
|
|
|
1324 curlevel->last = -1;
|
|
|
1325
|
|
|
1326 /* Enter the loop at a place appropriate for initial state. */
|
|
|
1327
|
|
|
1328 if (state.incomment) goto startincomment;
|
|
|
1329 if (state.instring >= 0)
|
|
|
1330 {
|
|
|
1331 if (start_quoted) goto startquotedinstring;
|
|
|
1332 goto startinstring;
|
|
|
1333 }
|
|
|
1334 if (start_quoted) goto startquoted;
|
|
|
1335
|
|
|
1336 while (from < end)
|
|
|
1337 {
|
|
|
1338 QUIT;
|
|
|
1339
|
|
|
1340 code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from));
|
|
|
1341 from++;
|
|
|
1342
|
|
|
1343 if (code == Scomment)
|
|
|
1344 {
|
|
|
1345 /* record the comment style we have entered so that only the
|
|
|
1346 comment-ender sequence (or single char) of the same style
|
|
|
1347 actually terminates the comment section. */
|
|
|
1348 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab,
|
|
|
1349 BUF_FETCH_CHAR (buf, from-1));
|
|
|
1350 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1351 state.comstart = from - 1;
|
|
|
1352 }
|
|
|
1353
|
|
|
1354 else if (from < end &&
|
|
|
1355 SYNTAX_START_P (mirrortab, BUF_FETCH_CHAR (buf, from-1),
|
|
|
1356 BUF_FETCH_CHAR (buf, from)))
|
|
|
1357 {
|
|
|
1358 /* Record the comment style we have entered so that only
|
|
|
1359 the comment-end sequence of the same style actually
|
|
|
1360 terminates the comment section. */
|
|
|
1361 code = Scomment;
|
|
|
1362 mask = SYNTAX_COMMENT_MASK_START (mirrortab,
|
|
|
1363 BUF_FETCH_CHAR (buf, from-1),
|
|
|
1364 BUF_FETCH_CHAR (buf, from));
|
|
|
1365 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1366 state.comstart = from-1;
|
|
|
1367 from++;
|
|
|
1368 }
|
|
|
1369
|
|
|
1370 if (SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
|
1371 continue;
|
|
|
1372 switch (code)
|
|
|
1373 {
|
|
|
1374 case Sescape:
|
|
|
1375 case Scharquote:
|
|
|
1376 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1377 curlevel->last = from - 1;
|
|
|
1378 startquoted:
|
|
|
1379 if (from == end) goto endquoted;
|
|
|
1380 from++;
|
|
|
1381 goto symstarted;
|
|
|
1382 /* treat following character as a word constituent */
|
|
|
1383 case Sword:
|
|
|
1384 case Ssymbol:
|
|
|
1385 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1386 curlevel->last = from - 1;
|
|
|
1387 symstarted:
|
|
|
1388 while (from < end)
|
|
|
1389 {
|
|
|
1390 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
1391 {
|
|
|
1392 case Scharquote:
|
|
|
1393 case Sescape:
|
|
|
1394 from++;
|
|
|
1395 if (from == end) goto endquoted;
|
|
|
1396 break;
|
|
|
1397 case Sword:
|
|
|
1398 case Ssymbol:
|
|
|
1399 case Squote:
|
|
|
1400 break;
|
|
|
1401 default:
|
|
|
1402 goto symdone;
|
|
|
1403 }
|
|
|
1404 from++;
|
|
|
1405 }
|
|
|
1406 symdone:
|
|
|
1407 curlevel->prev = curlevel->last;
|
|
|
1408 break;
|
|
|
1409
|
|
|
1410 case Scomment:
|
|
|
1411 state.incomment = 1;
|
|
|
1412 startincomment:
|
|
|
1413 if (commentstop)
|
|
|
1414 goto done;
|
|
|
1415 {
|
|
|
1416 Bufpos newfrom = find_end_of_comment (buf, from, end, mask);
|
|
|
1417 if (newfrom < 0)
|
|
|
1418 {
|
|
|
1419 /* we terminated search because from == end */
|
|
|
1420 from = end;
|
|
|
1421 goto done;
|
|
|
1422 }
|
|
|
1423 from = newfrom;
|
|
|
1424 }
|
|
|
1425 state.incomment = 0;
|
|
|
1426 state.comstyle = 0; /* reset the comment style */
|
|
|
1427 mask = 0;
|
|
|
1428 break;
|
|
|
1429
|
|
|
1430 case Sopen:
|
|
|
1431 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1432 depth++;
|
|
|
1433 /* curlevel++->last ran into compiler bug on Apollo */
|
|
|
1434 curlevel->last = from - 1;
|
|
|
1435 if (++curlevel == endlevel)
|
|
|
1436 error ("Nesting too deep for parser");
|
|
|
1437 curlevel->prev = -1;
|
|
|
1438 curlevel->last = -1;
|
|
|
1439 if (targetdepth == depth) goto done;
|
|
|
1440 break;
|
|
|
1441
|
|
|
1442 case Sclose:
|
|
|
1443 depth--;
|
|
|
1444 if (depth < mindepth)
|
|
|
1445 mindepth = depth;
|
|
|
1446 if (curlevel != levelstart)
|
|
|
1447 curlevel--;
|
|
|
1448 curlevel->prev = curlevel->last;
|
|
|
1449 if (targetdepth == depth) goto done;
|
|
|
1450 break;
|
|
|
1451
|
|
|
1452 case Sstring:
|
|
|
1453 {
|
|
|
1454 Emchar ch;
|
|
|
1455 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1456 curlevel->last = from - 1;
|
|
|
1457 /* XEmacs change: call syntax_match() on character */
|
|
|
1458 ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
1459 {
|
|
|
1460 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
1461
|
|
|
1462 if (CHARP (stermobj))
|
|
|
1463 state.instring = XCHAR (stermobj);
|
|
|
1464 else
|
|
|
1465 state.instring = ch;
|
|
|
1466 }
|
|
|
1467 }
|
|
|
1468 startinstring:
|
|
|
1469 while (1)
|
|
|
1470 {
|
|
|
1471 if (from >= end) goto done;
|
|
|
1472 if (BUF_FETCH_CHAR (buf, from) == state.instring) break;
|
|
|
1473 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
1474 {
|
|
|
1475 case Scharquote:
|
|
|
1476 case Sescape:
|
|
|
1477 {
|
|
|
1478 from++;
|
|
|
1479 startquotedinstring:
|
|
|
1480 if (from >= end) goto endquoted;
|
|
|
1481 break;
|
|
|
1482 }
|
|
|
1483 default:
|
|
|
1484 break;
|
|
|
1485 }
|
|
|
1486 from++;
|
|
|
1487 }
|
|
|
1488 state.instring = -1;
|
|
|
1489 curlevel->prev = curlevel->last;
|
|
|
1490 from++;
|
|
|
1491 break;
|
|
|
1492
|
|
|
1493 case Smath:
|
|
|
1494 break;
|
|
|
1495
|
|
|
1496 case Swhitespace:
|
|
|
1497 case Spunct:
|
|
|
1498 case Squote:
|
|
|
1499 case Sendcomment:
|
|
|
1500 case Sinherit:
|
|
|
1501 case Smax:
|
|
|
1502 break;
|
|
|
1503 }
|
|
|
1504 }
|
|
|
1505 goto done;
|
|
|
1506
|
|
|
1507 stop: /* Here if stopping before start of sexp. */
|
|
|
1508 from--; /* We have just fetched the char that starts it; */
|
|
|
1509 goto done; /* but return the position before it. */
|
|
|
1510
|
|
|
1511 endquoted:
|
|
|
1512 state.quoted = 1;
|
|
|
1513 done:
|
|
|
1514 state.depth = depth;
|
|
|
1515 state.mindepth = mindepth;
|
|
|
1516 state.thislevelstart = curlevel->prev;
|
|
|
1517 state.prevlevelstart
|
|
|
1518 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last;
|
|
|
1519 state.location = from;
|
|
|
1520
|
|
|
1521 *stateptr = state;
|
|
|
1522 }
|
|
|
1523
|
|
|
1524 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /*
|
|
|
1525 Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
|
|
|
1526 Parsing stops at TO or when certain criteria are met;
|
|
|
1527 point is set to where parsing stops.
|
|
444
|
1528 If fifth arg OLDSTATE is omitted or nil,
|
|
428
|
1529 parsing assumes that FROM is the beginning of a function.
|
|
|
1530 Value is a list of eight elements describing final state of parsing:
|
|
|
1531 0. depth in parens.
|
|
|
1532 1. character address of start of innermost containing list; nil if none.
|
|
|
1533 2. character address of start of last complete sexp terminated.
|
|
|
1534 3. non-nil if inside a string.
|
|
|
1535 (It is the character that will terminate the string.)
|
|
|
1536 4. t if inside a comment.
|
|
|
1537 5. t if following a quote character.
|
|
|
1538 6. the minimum paren-depth encountered during this scan.
|
|
|
1539 7. nil if in comment style a, or not in a comment; t if in comment style b
|
|
|
1540 If third arg TARGETDEPTH is non-nil, parsing stops if the depth
|
|
|
1541 in parentheses becomes equal to TARGETDEPTH.
|
|
|
1542 Fourth arg STOPBEFORE non-nil means stop when come to
|
|
|
1543 any character that starts a sexp.
|
|
444
|
1544 Fifth arg OLDSTATE is an eight-element list like what this function returns.
|
|
428
|
1545 It is used to initialize the state of the parse. Its second and third
|
|
|
1546 elements are ignored.
|
|
|
1547 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.
|
|
|
1548 */
|
|
|
1549 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer))
|
|
|
1550 {
|
|
|
1551 struct lisp_parse_state state;
|
|
|
1552 int target;
|
|
|
1553 Bufpos start, end;
|
|
|
1554 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1555 Lisp_Object val;
|
|
|
1556
|
|
|
1557 if (!NILP (targetdepth))
|
|
|
1558 {
|
|
|
1559 CHECK_INT (targetdepth);
|
|
|
1560 target = XINT (targetdepth);
|
|
|
1561 }
|
|
|
1562 else
|
|
|
1563 target = -100000; /* We won't reach this depth */
|
|
|
1564
|
|
|
1565 get_buffer_range_char (buf, from, to, &start, &end, 0);
|
|
|
1566 scan_sexps_forward (buf, &state, start, end,
|
|
|
1567 target, !NILP (stopbefore), oldstate,
|
|
|
1568 !NILP (commentstop));
|
|
|
1569
|
|
|
1570 BUF_SET_PT (buf, state.location);
|
|
|
1571
|
|
|
1572 /* reverse order */
|
|
|
1573 val = Qnil;
|
|
|
1574 val = Fcons (state.comstyle ? Qt : Qnil, val);
|
|
|
1575 val = Fcons (make_int (state.mindepth), val);
|
|
|
1576 val = Fcons (state.quoted ? Qt : Qnil, val);
|
|
|
1577 val = Fcons (state.incomment ? Qt : Qnil, val);
|
|
|
1578 val = Fcons (state.instring < 0 ? Qnil : make_int (state.instring), val);
|
|
|
1579 val = Fcons (state.thislevelstart < 0 ? Qnil : make_int (state.thislevelstart), val);
|
|
|
1580 val = Fcons (state.prevlevelstart < 0 ? Qnil : make_int (state.prevlevelstart), val);
|
|
|
1581 val = Fcons (make_int (state.depth), val);
|
|
|
1582
|
|
|
1583 return val;
|
|
|
1584 }
|
|
|
1585
|
|
|
1586
|
|
|
1587 /* Updating of the mirror syntax table.
|
|
|
1588
|
|
|
1589 Each syntax table has a corresponding mirror table in it.
|
|
|
1590 Whenever we make a change to a syntax table, we call
|
|
|
1591 update_syntax_table() on it.
|
|
|
1592
|
|
|
1593 #### We really only need to map over the changed range.
|
|
|
1594
|
|
|
1595 If we change the standard syntax table, we need to map over
|
|
|
1596 all tables because any of them could be inheriting from the
|
|
|
1597 standard syntax table.
|
|
|
1598
|
|
|
1599 When `set-syntax-table' is called, we set the buffer's mirror
|
|
|
1600 syntax table as well.
|
|
|
1601 */
|
|
|
1602
|
|
|
1603 struct cmst_arg
|
|
|
1604 {
|
|
|
1605 Lisp_Object mirrortab;
|
|
|
1606 int check_inherit;
|
|
|
1607 };
|
|
|
1608
|
|
|
1609 static int
|
|
|
1610 cmst_mapfun (struct chartab_range *range, Lisp_Object val, void *arg)
|
|
|
1611 {
|
|
|
1612 struct cmst_arg *closure = (struct cmst_arg *) arg;
|
|
|
1613
|
|
|
1614 if (CONSP (val))
|
|
|
1615 val = XCAR (val);
|
|
|
1616 if (SYNTAX_FROM_CODE (XINT (val)) == Sinherit
|
|
|
1617 && closure->check_inherit)
|
|
|
1618 {
|
|
|
1619 struct cmst_arg recursive;
|
|
|
1620
|
|
|
1621 recursive.mirrortab = closure->mirrortab;
|
|
|
1622 recursive.check_inherit = 0;
|
|
|
1623 map_char_table (XCHAR_TABLE (Vstandard_syntax_table), range,
|
|
|
1624 cmst_mapfun, &recursive);
|
|
|
1625 }
|
|
|
1626 else
|
|
|
1627 put_char_table (XCHAR_TABLE (closure->mirrortab), range, val);
|
|
|
1628 return 0;
|
|
|
1629 }
|
|
|
1630
|
|
|
1631 static void
|
|
440
|
1632 update_just_this_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
1633 {
|
|
|
1634 struct chartab_range range;
|
|
|
1635 struct cmst_arg arg;
|
|
|
1636
|
|
|
1637 arg.mirrortab = ct->mirror_table;
|
|
|
1638 arg.check_inherit = (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1639 && ct != XCHAR_TABLE (Vstandard_syntax_table));
|
|
|
1640 range.type = CHARTAB_RANGE_ALL;
|
|
|
1641 map_char_table (ct, &range, cmst_mapfun, &arg);
|
|
|
1642 }
|
|
|
1643
|
|
|
1644 /* Called from chartab.c when a change is made to a syntax table.
|
|
|
1645 If this is the standard syntax table, we need to recompute
|
|
|
1646 *all* syntax tables (yuck). Otherwise we just recompute this
|
|
|
1647 one. */
|
|
|
1648
|
|
|
1649 void
|
|
440
|
1650 update_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
1651 {
|
|
|
1652 /* Don't be stymied at startup. */
|
|
|
1653 if (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1654 && ct == XCHAR_TABLE (Vstandard_syntax_table))
|
|
|
1655 {
|
|
|
1656 Lisp_Object syntab;
|
|
|
1657
|
|
|
1658 for (syntab = Vall_syntax_tables; !NILP (syntab);
|
|
|
1659 syntab = XCHAR_TABLE (syntab)->next_table)
|
|
|
1660 update_just_this_syntax_table (XCHAR_TABLE (syntab));
|
|
|
1661 }
|
|
|
1662 else
|
|
|
1663 update_just_this_syntax_table (ct);
|
|
|
1664 }
|
|
|
1665
|
|
|
1666
|
|
|
1667 /************************************************************************/
|
|
|
1668 /* initialization */
|
|
|
1669 /************************************************************************/
|
|
|
1670
|
|
|
1671 void
|
|
|
1672 syms_of_syntax (void)
|
|
|
1673 {
|
|
|
1674 defsymbol (&Qsyntax_table_p, "syntax-table-p");
|
|
|
1675
|
|
|
1676 DEFSUBR (Fsyntax_table_p);
|
|
|
1677 DEFSUBR (Fsyntax_table);
|
|
|
1678 DEFSUBR (Fstandard_syntax_table);
|
|
|
1679 DEFSUBR (Fcopy_syntax_table);
|
|
|
1680 DEFSUBR (Fset_syntax_table);
|
|
|
1681 DEFSUBR (Fsyntax_designator_chars);
|
|
|
1682 DEFSUBR (Fchar_syntax);
|
|
|
1683 DEFSUBR (Fmatching_paren);
|
|
|
1684 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */
|
|
|
1685 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */
|
|
|
1686
|
|
|
1687 DEFSUBR (Fforward_word);
|
|
|
1688
|
|
|
1689 DEFSUBR (Fforward_comment);
|
|
|
1690 DEFSUBR (Fscan_lists);
|
|
|
1691 DEFSUBR (Fscan_sexps);
|
|
|
1692 DEFSUBR (Fbackward_prefix_chars);
|
|
|
1693 DEFSUBR (Fparse_partial_sexp);
|
|
|
1694 }
|
|
|
1695
|
|
|
1696 void
|
|
|
1697 vars_of_syntax (void)
|
|
|
1698 {
|
|
|
1699 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /*
|
|
|
1700 Non-nil means `forward-sexp', etc., should treat comments as whitespace.
|
|
|
1701 */ );
|
|
434
|
1702 parse_sexp_ignore_comments = 0;
|
|
428
|
1703
|
|
|
1704 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /*
|
|
|
1705 Non-nil means `forward-word', etc., should treat escape chars part of words.
|
|
|
1706 */ );
|
|
434
|
1707 words_include_escapes = 0;
|
|
428
|
1708
|
|
|
1709 no_quit_in_re_search = 0;
|
|
|
1710 }
|
|
|
1711
|
|
|
1712 static void
|
|
442
|
1713 define_standard_syntax (const char *p, enum syntaxcode syn)
|
|
428
|
1714 {
|
|
|
1715 for (; *p; p++)
|
|
|
1716 Fput_char_table (make_char (*p), make_int (syn), Vstandard_syntax_table);
|
|
|
1717 }
|
|
|
1718
|
|
|
1719 void
|
|
|
1720 complex_vars_of_syntax (void)
|
|
|
1721 {
|
|
|
1722 Emchar i;
|
|
442
|
1723 const char *p;
|
|
428
|
1724 /* Set this now, so first buffer creation can refer to it. */
|
|
|
1725 /* Make it nil before calling copy-syntax-table
|
|
|
1726 so that copy-syntax-table will know not to try to copy from garbage */
|
|
|
1727 Vstandard_syntax_table = Qnil;
|
|
|
1728 Vstandard_syntax_table = Fcopy_syntax_table (Qnil);
|
|
|
1729 staticpro (&Vstandard_syntax_table);
|
|
|
1730
|
|
|
1731 Vsyntax_designator_chars_string = make_string_nocopy (syntax_code_spec,
|
|
|
1732 Smax);
|
|
|
1733 staticpro (&Vsyntax_designator_chars_string);
|
|
|
1734
|
|
|
1735 fill_char_table (XCHAR_TABLE (Vstandard_syntax_table), make_int (Spunct));
|
|
|
1736
|
|
|
1737 for (i = 0; i <= 32; i++) /* Control 0 plus SPACE */
|
|
|
1738 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
1739 Vstandard_syntax_table);
|
|
|
1740 for (i = 127; i <= 159; i++) /* DEL plus Control 1 */
|
|
|
1741 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
1742 Vstandard_syntax_table);
|
|
|
1743
|
|
|
1744 define_standard_syntax ("abcdefghijklmnopqrstuvwxyz"
|
|
|
1745 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
1746 "0123456789"
|
|
|
1747 "$%", Sword);
|
|
|
1748 define_standard_syntax ("\"", Sstring);
|
|
|
1749 define_standard_syntax ("\\", Sescape);
|
|
|
1750 define_standard_syntax ("_-+*/&|<>=", Ssymbol);
|
|
|
1751 define_standard_syntax (".,;:?!#@~^'`", Spunct);
|
|
|
1752
|
|
|
1753 for (p = "()[]{}"; *p; p+=2)
|
|
|
1754 {
|
|
|
1755 Fput_char_table (make_char (p[0]),
|
|
|
1756 Fcons (make_int (Sopen), make_char (p[1])),
|
|
|
1757 Vstandard_syntax_table);
|
|
|
1758 Fput_char_table (make_char (p[1]),
|
|
|
1759 Fcons (make_int (Sclose), make_char (p[0])),
|
|
|
1760 Vstandard_syntax_table);
|
|
|
1761 }
|
|
|
1762 }
|
