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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 DEFUN ("forward-word", Fforward_word, 1, 2, "_p", /*
|
|
|
447 Move point forward COUNT words (backward if COUNT is negative).
|
|
|
448 Normally returns t.
|
|
|
449 If an edge of the buffer is reached, point is left there
|
|
|
450 and nil is returned.
|
|
|
451
|
|
|
452 Optional argument BUFFER defaults to the current buffer.
|
|
|
453 */
|
|
|
454 (count, buffer))
|
|
|
455 {
|
|
|
456 Bufpos val;
|
|
|
457 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
458 CHECK_INT (count);
|
|
|
459
|
|
|
460 if (!(val = scan_words (buf, BUF_PT (buf), XINT (count))))
|
|
|
461 {
|
|
|
462 BUF_SET_PT (buf, XINT (count) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf));
|
|
|
463 return Qnil;
|
|
|
464 }
|
|
|
465 BUF_SET_PT (buf, val);
|
|
|
466 return Qt;
|
|
|
467 }
|
|
|
468
|
|
|
469 static void scan_sexps_forward (struct buffer *buf,
|
|
|
470 struct lisp_parse_state *,
|
|
|
471 Bufpos from, Bufpos end,
|
|
|
472 int targetdepth, int stopbefore,
|
|
|
473 Lisp_Object oldstate,
|
|
|
474 int commentstop);
|
|
|
475
|
|
|
476 static int
|
|
|
477 find_start_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
478 {
|
|
|
479 Emchar c;
|
|
|
480 enum syntaxcode code;
|
|
440
|
481 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
482
|
|
|
483 /* Look back, counting the parity of string-quotes,
|
|
|
484 and recording the comment-starters seen.
|
|
|
485 When we reach a safe place, assume that's not in a string;
|
|
|
486 then step the main scan to the earliest comment-starter seen
|
|
|
487 an even number of string quotes away from the safe place.
|
|
|
488
|
|
|
489 OFROM[I] is position of the earliest comment-starter seen
|
|
|
490 which is I+2X quotes from the comment-end.
|
|
|
491 PARITY is current parity of quotes from the comment end. */
|
|
|
492 int parity = 0;
|
|
|
493 Emchar my_stringend = 0;
|
|
|
494 int string_lossage = 0;
|
|
|
495 Bufpos comment_end = from;
|
|
|
496 Bufpos comstart_pos = 0;
|
|
|
497 int comstart_parity = 0;
|
|
|
498 int styles_match_p = 0;
|
|
|
499
|
|
|
500 /* At beginning of range to scan, we're outside of strings;
|
|
|
501 that determines quote parity to the comment-end. */
|
|
|
502 while (from != stop)
|
|
|
503 {
|
|
|
504 /* Move back and examine a character. */
|
|
|
505 from--;
|
|
|
506
|
|
|
507 c = BUF_FETCH_CHAR (buf, from);
|
|
|
508 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
509
|
|
|
510 /* is this a 1-char comment end sequence? if so, try
|
|
|
511 to see if style matches previously extracted mask */
|
|
|
512 if (code == Sendcomment)
|
|
|
513 {
|
|
|
514 styles_match_p = SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask);
|
|
|
515 }
|
|
|
516
|
|
|
517 /* otherwise, is this a 2-char comment end sequence? */
|
|
|
518 else if (from >= stop
|
|
|
519 && SYNTAX_END_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
|
520 {
|
|
|
521 code = Sendcomment;
|
|
|
522 styles_match_p =
|
|
|
523 SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
|
524 BUF_FETCH_CHAR (buf, from+1),
|
|
|
525 mask);
|
|
|
526 }
|
|
|
527
|
|
|
528 /* or are we looking at a 1-char comment start sequence
|
|
|
529 of the style matching mask? */
|
|
|
530 else if (code == Scomment
|
|
|
531 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
|
532 {
|
|
|
533 styles_match_p = 1;
|
|
|
534 }
|
|
|
535
|
|
|
536 /* or possibly, a 2-char comment start sequence */
|
|
|
537 else if (from >= stop
|
|
|
538 && SYNTAX_STYLES_MATCH_START_P (mirrortab, c,
|
|
|
539 BUF_FETCH_CHAR (buf, from+1),
|
|
|
540 mask))
|
|
|
541 {
|
|
|
542 code = Scomment;
|
|
|
543 styles_match_p = 1;
|
|
|
544 }
|
|
|
545
|
|
|
546 /* Ignore escaped characters. */
|
|
|
547 if (char_quoted (buf, from))
|
|
|
548 continue;
|
|
|
549
|
|
|
550 /* Track parity of quotes. */
|
|
|
551 if (code == Sstring)
|
|
|
552 {
|
|
|
553 parity ^= 1;
|
|
|
554 if (my_stringend == 0)
|
|
|
555 my_stringend = c;
|
|
|
556 /* If we have two kinds of string delimiters.
|
|
|
557 There's no way to grok this scanning backwards. */
|
|
|
558 else if (my_stringend != c)
|
|
|
559 string_lossage = 1;
|
|
|
560 }
|
|
|
561
|
|
|
562 /* Record comment-starters according to that
|
|
|
563 quote-parity to the comment-end. */
|
|
|
564 if (code == Scomment && styles_match_p)
|
|
|
565 {
|
|
|
566 comstart_parity = parity;
|
|
|
567 comstart_pos = from;
|
|
|
568 }
|
|
|
569
|
|
|
570 /* If we find another earlier comment-ender,
|
|
|
571 any comment-starts earlier than that don't count
|
|
|
572 (because they go with the earlier comment-ender). */
|
|
|
573 if (code == Sendcomment && styles_match_p)
|
|
|
574 break;
|
|
|
575
|
|
|
576 /* Assume a defun-start point is outside of strings. */
|
|
|
577 if (code == Sopen
|
|
|
578 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n'))
|
|
|
579 break;
|
|
|
580 }
|
|
|
581
|
|
|
582 if (comstart_pos == 0)
|
|
|
583 from = comment_end;
|
|
|
584 /* If the earliest comment starter
|
|
|
585 is followed by uniform paired string quotes or none,
|
|
|
586 we know it can't be inside a string
|
|
|
587 since if it were then the comment ender would be inside one.
|
|
|
588 So it does start a comment. Skip back to it. */
|
|
|
589 else if (comstart_parity == 0 && !string_lossage)
|
|
|
590 from = comstart_pos;
|
|
|
591 else
|
|
|
592 {
|
|
|
593 /* We had two kinds of string delimiters mixed up
|
|
|
594 together. Decode this going forwards.
|
|
|
595 Scan fwd from the previous comment ender
|
|
|
596 to the one in question; this records where we
|
|
|
597 last passed a comment starter. */
|
|
|
598
|
|
|
599 struct lisp_parse_state state;
|
|
|
600 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end),
|
|
|
601 comment_end - 1, -10000, 0, Qnil, 0);
|
|
|
602 if (state.incomment)
|
|
|
603 from = state.comstart;
|
|
|
604 else
|
|
|
605 /* We can't grok this as a comment; scan it normally. */
|
|
|
606 from = comment_end;
|
|
|
607 }
|
|
|
608 return from;
|
|
|
609 }
|
|
|
610
|
|
|
611 static Bufpos
|
|
|
612 find_end_of_comment (struct buffer *buf, Bufpos from, Bufpos stop, int mask)
|
|
|
613 {
|
|
|
614 int c;
|
|
440
|
615 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
616
|
|
|
617 while (1)
|
|
|
618 {
|
|
|
619 if (from == stop)
|
|
|
620 {
|
|
|
621 return -1;
|
|
|
622 }
|
|
|
623 c = BUF_FETCH_CHAR (buf, from);
|
|
|
624 if (SYNTAX_UNSAFE (mirrortab, c) == Sendcomment
|
|
|
625 && SYNTAX_STYLES_MATCH_1CHAR_P (mirrortab, c, mask))
|
|
|
626 /* we have encountered a comment end of the same style
|
|
|
627 as the comment sequence which began this comment
|
|
|
628 section */
|
|
|
629 break;
|
|
|
630
|
|
|
631 from++;
|
|
|
632 if (from < stop
|
|
|
633 && SYNTAX_STYLES_MATCH_END_P (mirrortab, c,
|
|
|
634 BUF_FETCH_CHAR (buf, from), mask))
|
|
|
635 /* we have encountered a comment end of the same style
|
|
|
636 as the comment sequence which began this comment
|
|
|
637 section */
|
|
|
638 { from++; break; }
|
|
|
639 }
|
|
|
640 return from;
|
|
|
641 }
|
|
|
642
|
|
|
643
|
|
|
644 /* #### between FSF 19.23 and 19.28 there are some changes to the logic
|
|
|
645 in this function (and minor changes to find_start_of_comment(),
|
|
|
646 above, which is part of Fforward_comment() in FSF). Attempts to port
|
|
|
647 that logic made this function break, so I'm leaving it out. If anyone
|
|
|
648 ever complains about this function not working properly, take a look
|
|
|
649 at those changes. --ben */
|
|
|
650
|
|
|
651 DEFUN ("forward-comment", Fforward_comment, 1, 2, 0, /*
|
|
444
|
652 Move forward across up to COUNT comments, or backwards if COUNT is negative.
|
|
428
|
653 Stop scanning if we find something other than a comment or whitespace.
|
|
|
654 Set point to where scanning stops.
|
|
444
|
655 If COUNT comments are found as expected, with nothing except whitespace
|
|
428
|
656 between them, return t; otherwise return nil.
|
|
|
657 Point is set in either case.
|
|
|
658 Optional argument BUFFER defaults to the current buffer.
|
|
|
659 */
|
|
444
|
660 (count, buffer))
|
|
428
|
661 {
|
|
|
662 Bufpos from;
|
|
|
663 Bufpos stop;
|
|
|
664 Emchar c;
|
|
|
665 enum syntaxcode code;
|
|
444
|
666 EMACS_INT n;
|
|
428
|
667 struct buffer *buf = decode_buffer (buffer, 0);
|
|
440
|
668 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
669
|
|
444
|
670 CHECK_INT (count);
|
|
|
671 n = XINT (count);
|
|
428
|
672
|
|
|
673 from = BUF_PT (buf);
|
|
|
674
|
|
444
|
675 while (n > 0)
|
|
428
|
676 {
|
|
|
677 QUIT;
|
|
|
678
|
|
|
679 stop = BUF_ZV (buf);
|
|
|
680 while (from < stop)
|
|
|
681 {
|
|
|
682 int mask = 0; /* mask for finding matching comment style */
|
|
|
683
|
|
|
684 if (char_quoted (buf, from))
|
|
|
685 {
|
|
|
686 from++;
|
|
|
687 continue;
|
|
|
688 }
|
|
|
689
|
|
|
690 c = BUF_FETCH_CHAR (buf, from);
|
|
|
691 code = SYNTAX (mirrortab, c);
|
|
|
692
|
|
|
693 if (code == Scomment)
|
|
|
694 {
|
|
|
695 /* we have encountered a single character comment start
|
|
|
696 sequence, and we are ignoring all text inside comments.
|
|
|
697 we must record the comment style this character begins
|
|
|
698 so that later, only a comment end of the same style actually
|
|
|
699 ends the comment section */
|
|
|
700 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
701 }
|
|
|
702
|
|
|
703 else if (from < stop
|
|
|
704 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from+1)))
|
|
|
705 {
|
|
|
706 /* we have encountered a 2char comment start sequence and we
|
|
|
707 are ignoring all text inside comments. we must record
|
|
|
708 the comment style this sequence begins so that later,
|
|
|
709 only a comment end of the same style actually ends
|
|
|
710 the comment section */
|
|
|
711 code = Scomment;
|
|
|
712 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
|
713 BUF_FETCH_CHAR (buf, from+1));
|
|
|
714 from++;
|
|
|
715 }
|
|
|
716
|
|
|
717 if (code == Scomment)
|
|
|
718 {
|
|
|
719 Bufpos newfrom;
|
|
|
720
|
|
|
721 newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
722 if (newfrom < 0)
|
|
|
723 {
|
|
|
724 /* we stopped because from==stop */
|
|
|
725 BUF_SET_PT (buf, stop);
|
|
|
726 return Qnil;
|
|
|
727 }
|
|
|
728 from = newfrom;
|
|
|
729
|
|
|
730 /* We have skipped one comment. */
|
|
|
731 break;
|
|
|
732 }
|
|
|
733 else if (code != Swhitespace
|
|
|
734 && code != Sendcomment
|
|
|
735 && code != Scomment )
|
|
|
736 {
|
|
|
737 BUF_SET_PT (buf, from);
|
|
|
738 return Qnil;
|
|
|
739 }
|
|
|
740 from++;
|
|
|
741 }
|
|
|
742
|
|
|
743 /* End of comment reached */
|
|
444
|
744 n--;
|
|
428
|
745 }
|
|
|
746
|
|
444
|
747 while (n < 0)
|
|
428
|
748 {
|
|
|
749 QUIT;
|
|
|
750
|
|
|
751 stop = BUF_BEGV (buf);
|
|
|
752 while (from > stop)
|
|
|
753 {
|
|
|
754 int mask = 0; /* mask for finding matching comment style */
|
|
|
755
|
|
|
756 from--;
|
|
|
757 if (char_quoted (buf, from))
|
|
|
758 {
|
|
|
759 from--;
|
|
|
760 continue;
|
|
|
761 }
|
|
|
762
|
|
|
763 c = BUF_FETCH_CHAR (buf, from);
|
|
|
764 code = SYNTAX (mirrortab, c);
|
|
|
765
|
|
|
766 if (code == Sendcomment)
|
|
|
767 {
|
|
|
768 /* we have found a single char end comment. we must record
|
|
|
769 the comment style encountered so that later, we can match
|
|
|
770 only the proper comment begin sequence of the same style */
|
|
|
771 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
772 }
|
|
|
773
|
|
|
774 else if (from > stop
|
|
|
775 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from - 1), c)
|
|
|
776 && !char_quoted (buf, from - 1))
|
|
|
777 {
|
|
|
778 /* We must record the comment style encountered so that
|
|
|
779 later, we can match only the proper comment begin
|
|
|
780 sequence of the same style. */
|
|
|
781 code = Sendcomment;
|
|
|
782 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
|
783 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
784 c);
|
|
|
785 from--;
|
|
|
786 }
|
|
|
787
|
|
|
788 if (code == Sendcomment)
|
|
|
789 {
|
|
|
790 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
791 break;
|
|
|
792 }
|
|
|
793
|
|
|
794 else if (code != Swhitespace
|
|
|
795 && SYNTAX (mirrortab, c) != Scomment
|
|
|
796 && SYNTAX (mirrortab, c) != Sendcomment)
|
|
|
797 {
|
|
|
798 BUF_SET_PT (buf, from + 1);
|
|
|
799 return Qnil;
|
|
|
800 }
|
|
|
801 }
|
|
|
802
|
|
444
|
803 n++;
|
|
428
|
804 }
|
|
|
805
|
|
|
806 BUF_SET_PT (buf, from);
|
|
|
807 return Qt;
|
|
|
808 }
|
|
|
809
|
|
|
810
|
|
|
811 Lisp_Object
|
|
|
812 scan_lists (struct buffer *buf, Bufpos from, int count, int depth,
|
|
444
|
813 int sexpflag, int noerror)
|
|
428
|
814 {
|
|
|
815 Bufpos stop;
|
|
|
816 Emchar c;
|
|
|
817 int quoted;
|
|
|
818 int mathexit = 0;
|
|
|
819 enum syntaxcode code;
|
|
|
820 int min_depth = depth; /* Err out if depth gets less than this. */
|
|
|
821 Lisp_Object syntaxtab = buf->syntax_table;
|
|
440
|
822 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
823
|
|
|
824 if (depth > 0) min_depth = 0;
|
|
|
825
|
|
|
826 while (count > 0)
|
|
|
827 {
|
|
|
828 QUIT;
|
|
|
829
|
|
|
830 stop = BUF_ZV (buf);
|
|
|
831 while (from < stop)
|
|
|
832 {
|
|
|
833 int mask = 0; /* mask for finding matching comment style */
|
|
|
834
|
|
|
835 c = BUF_FETCH_CHAR (buf, from);
|
|
|
836 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
837 from++;
|
|
|
838
|
|
|
839 /* a 1-char comment start sequence */
|
|
|
840 if (code == Scomment && parse_sexp_ignore_comments)
|
|
|
841 {
|
|
|
842 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
843 }
|
|
|
844
|
|
|
845 /* else, a 2-char comment start sequence? */
|
|
|
846 else if (from < stop
|
|
|
847 && SYNTAX_START_P (mirrortab, c, BUF_FETCH_CHAR (buf, from))
|
|
|
848 && parse_sexp_ignore_comments)
|
|
|
849 {
|
|
|
850 /* we have encountered a comment start sequence and we
|
|
|
851 are ignoring all text inside comments. we must record
|
|
|
852 the comment style this sequence begins so that later,
|
|
|
853 only a comment end of the same style actually ends
|
|
|
854 the comment section */
|
|
|
855 code = Scomment;
|
|
|
856 mask = SYNTAX_COMMENT_MASK_START (mirrortab, c,
|
|
|
857 BUF_FETCH_CHAR (buf, from));
|
|
|
858 from++;
|
|
|
859 }
|
|
|
860
|
|
|
861 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
|
862 continue;
|
|
|
863
|
|
|
864 switch (code)
|
|
|
865 {
|
|
|
866 case Sescape:
|
|
|
867 case Scharquote:
|
|
|
868 if (from == stop) goto lose;
|
|
|
869 from++;
|
|
|
870 /* treat following character as a word constituent */
|
|
|
871 case Sword:
|
|
|
872 case Ssymbol:
|
|
|
873 if (depth || !sexpflag) break;
|
|
|
874 /* This word counts as a sexp; return at end of it. */
|
|
|
875 while (from < stop)
|
|
|
876 {
|
|
|
877 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
878 {
|
|
|
879 case Scharquote:
|
|
|
880 case Sescape:
|
|
|
881 from++;
|
|
|
882 if (from == stop) goto lose;
|
|
|
883 break;
|
|
|
884 case Sword:
|
|
|
885 case Ssymbol:
|
|
|
886 case Squote:
|
|
|
887 break;
|
|
|
888 default:
|
|
|
889 goto done;
|
|
|
890 }
|
|
|
891 from++;
|
|
|
892 }
|
|
|
893 goto done;
|
|
|
894
|
|
|
895 case Scomment:
|
|
|
896 if (!parse_sexp_ignore_comments)
|
|
|
897 break;
|
|
|
898 {
|
|
|
899 Bufpos newfrom = find_end_of_comment (buf, from, stop, mask);
|
|
|
900 if (newfrom < 0)
|
|
|
901 {
|
|
|
902 /* we stopped because from == stop in search forward */
|
|
|
903 from = stop;
|
|
|
904 if (depth == 0)
|
|
|
905 goto done;
|
|
|
906 goto lose;
|
|
|
907 }
|
|
|
908 from = newfrom;
|
|
|
909 }
|
|
|
910 break;
|
|
|
911
|
|
|
912 case Smath:
|
|
|
913 if (!sexpflag)
|
|
|
914 break;
|
|
|
915 if (from != stop && c == BUF_FETCH_CHAR (buf, from))
|
|
|
916 from++;
|
|
|
917 if (mathexit)
|
|
|
918 {
|
|
|
919 mathexit = 0;
|
|
|
920 goto close1;
|
|
|
921 }
|
|
|
922 mathexit = 1;
|
|
|
923
|
|
|
924 case Sopen:
|
|
|
925 if (!++depth) goto done;
|
|
|
926 break;
|
|
|
927
|
|
|
928 case Sclose:
|
|
|
929 close1:
|
|
|
930 if (!--depth) goto done;
|
|
|
931 if (depth < min_depth)
|
|
|
932 {
|
|
444
|
933 if (noerror)
|
|
428
|
934 return Qnil;
|
|
|
935 error ("Containing expression ends prematurely");
|
|
|
936 }
|
|
|
937 break;
|
|
|
938
|
|
|
939 case Sstring:
|
|
|
940 {
|
|
|
941 /* XEmacs change: call syntax_match on character */
|
|
|
942 Emchar ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
943 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
944 Emchar stringterm;
|
|
|
945
|
|
|
946 if (CHARP (stermobj))
|
|
|
947 stringterm = XCHAR (stermobj);
|
|
|
948 else
|
|
|
949 stringterm = ch;
|
|
|
950
|
|
|
951 while (1)
|
|
|
952 {
|
|
|
953 if (from >= stop)
|
|
|
954 goto lose;
|
|
|
955 if (BUF_FETCH_CHAR (buf, from) == stringterm)
|
|
|
956 break;
|
|
|
957 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
958 {
|
|
|
959 case Scharquote:
|
|
|
960 case Sescape:
|
|
|
961 from++;
|
|
|
962 break;
|
|
|
963 default:
|
|
|
964 break;
|
|
|
965 }
|
|
|
966 from++;
|
|
|
967 }
|
|
|
968 from++;
|
|
|
969 if (!depth && sexpflag) goto done;
|
|
|
970 break;
|
|
|
971 }
|
|
|
972
|
|
|
973 default:
|
|
|
974 break;
|
|
|
975 }
|
|
|
976 }
|
|
|
977
|
|
|
978 /* Reached end of buffer. Error if within object,
|
|
|
979 return nil if between */
|
|
|
980 if (depth) goto lose;
|
|
|
981
|
|
|
982 return Qnil;
|
|
|
983
|
|
|
984 /* End of object reached */
|
|
|
985 done:
|
|
|
986 count--;
|
|
|
987 }
|
|
|
988
|
|
|
989 while (count < 0)
|
|
|
990 {
|
|
|
991 QUIT;
|
|
|
992
|
|
|
993 stop = BUF_BEGV (buf);
|
|
|
994 while (from > stop)
|
|
|
995 {
|
|
|
996 int mask = 0; /* mask for finding matching comment style */
|
|
|
997
|
|
|
998 from--;
|
|
|
999 quoted = char_quoted (buf, from);
|
|
|
1000 if (quoted)
|
|
|
1001 from--;
|
|
|
1002
|
|
|
1003 c = BUF_FETCH_CHAR (buf, from);
|
|
|
1004 code = SYNTAX_UNSAFE (mirrortab, c);
|
|
|
1005
|
|
|
1006 if (code == Sendcomment && parse_sexp_ignore_comments)
|
|
|
1007 {
|
|
|
1008 /* we have found a single char end comment. we must record
|
|
|
1009 the comment style encountered so that later, we can match
|
|
|
1010 only the proper comment begin sequence of the same style */
|
|
|
1011 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab, c);
|
|
|
1012 }
|
|
|
1013
|
|
|
1014 else if (from > stop
|
|
|
1015 && SYNTAX_END_P (mirrortab, BUF_FETCH_CHAR (buf, from-1), c)
|
|
|
1016 && !char_quoted (buf, from - 1)
|
|
|
1017 && parse_sexp_ignore_comments)
|
|
|
1018 {
|
|
|
1019 /* we must record the comment style encountered so that
|
|
|
1020 later, we can match only the proper comment begin
|
|
|
1021 sequence of the same style */
|
|
|
1022 code = Sendcomment;
|
|
|
1023 mask = SYNTAX_COMMENT_MASK_END (mirrortab,
|
|
|
1024 BUF_FETCH_CHAR (buf, from - 1),
|
|
|
1025 c);
|
|
|
1026 from--;
|
|
|
1027 }
|
|
|
1028
|
|
|
1029 if (SYNTAX_PREFIX_UNSAFE (mirrortab, c))
|
|
|
1030 continue;
|
|
|
1031
|
|
434
|
1032 switch (quoted ? Sword : code)
|
|
428
|
1033 {
|
|
|
1034 case Sword:
|
|
|
1035 case Ssymbol:
|
|
|
1036 if (depth || !sexpflag) break;
|
|
|
1037 /* This word counts as a sexp; count object finished after
|
|
|
1038 passing it. */
|
|
|
1039 while (from > stop)
|
|
|
1040 {
|
|
|
1041 enum syntaxcode syncode;
|
|
|
1042 quoted = char_quoted (buf, from - 1);
|
|
|
1043
|
|
|
1044 if (quoted)
|
|
|
1045 from--;
|
|
|
1046 if (! (quoted
|
|
|
1047 || (syncode =
|
|
|
1048 SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
|
1049 == Sword
|
|
|
1050 || syncode == Ssymbol
|
|
|
1051 || syncode == Squote))
|
|
|
1052 goto done2;
|
|
|
1053 from--;
|
|
|
1054 }
|
|
|
1055 goto done2;
|
|
|
1056
|
|
|
1057 case Smath:
|
|
|
1058 if (!sexpflag)
|
|
|
1059 break;
|
|
|
1060 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1061 from--;
|
|
|
1062 if (mathexit)
|
|
|
1063 {
|
|
|
1064 mathexit = 0;
|
|
|
1065 goto open2;
|
|
|
1066 }
|
|
|
1067 mathexit = 1;
|
|
|
1068
|
|
|
1069 case Sclose:
|
|
|
1070 if (!++depth) goto done2;
|
|
|
1071 break;
|
|
|
1072
|
|
|
1073 case Sopen:
|
|
|
1074 open2:
|
|
|
1075 if (!--depth) goto done2;
|
|
|
1076 if (depth < min_depth)
|
|
|
1077 {
|
|
444
|
1078 if (noerror)
|
|
428
|
1079 return Qnil;
|
|
|
1080 error ("Containing expression ends prematurely");
|
|
|
1081 }
|
|
|
1082 break;
|
|
|
1083
|
|
|
1084 case Sendcomment:
|
|
|
1085 if (parse_sexp_ignore_comments)
|
|
|
1086 from = find_start_of_comment (buf, from, stop, mask);
|
|
|
1087 break;
|
|
|
1088
|
|
|
1089 case Sstring:
|
|
|
1090 {
|
|
|
1091 /* XEmacs change: call syntax_match() on character */
|
|
|
1092 Emchar ch = BUF_FETCH_CHAR (buf, from);
|
|
|
1093 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
1094 Emchar stringterm;
|
|
|
1095
|
|
|
1096 if (CHARP (stermobj))
|
|
|
1097 stringterm = XCHAR (stermobj);
|
|
|
1098 else
|
|
|
1099 stringterm = ch;
|
|
|
1100
|
|
|
1101 while (1)
|
|
|
1102 {
|
|
|
1103 if (from == stop) goto lose;
|
|
|
1104 if (!char_quoted (buf, from - 1)
|
|
|
1105 && stringterm == BUF_FETCH_CHAR (buf, from - 1))
|
|
|
1106 break;
|
|
|
1107 from--;
|
|
|
1108 }
|
|
|
1109 from--;
|
|
|
1110 if (!depth && sexpflag) goto done2;
|
|
|
1111 break;
|
|
|
1112 }
|
|
|
1113 }
|
|
|
1114 }
|
|
|
1115
|
|
|
1116 /* Reached start of buffer. Error if within object,
|
|
|
1117 return nil if between */
|
|
|
1118 if (depth) goto lose;
|
|
|
1119
|
|
|
1120 return Qnil;
|
|
|
1121
|
|
|
1122 done2:
|
|
|
1123 count++;
|
|
|
1124 }
|
|
|
1125
|
|
|
1126
|
|
|
1127 return (make_int (from));
|
|
|
1128
|
|
|
1129 lose:
|
|
444
|
1130 if (!noerror)
|
|
428
|
1131 error ("Unbalanced parentheses");
|
|
|
1132 return Qnil;
|
|
|
1133 }
|
|
|
1134
|
|
|
1135 int
|
|
|
1136 char_quoted (struct buffer *buf, Bufpos pos)
|
|
|
1137 {
|
|
|
1138 enum syntaxcode code;
|
|
|
1139 Bufpos beg = BUF_BEGV (buf);
|
|
|
1140 int quoted = 0;
|
|
440
|
1141 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1142
|
|
|
1143 while (pos > beg
|
|
|
1144 && ((code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)))
|
|
|
1145 == Scharquote
|
|
|
1146 || code == Sescape))
|
|
|
1147 pos--, quoted = !quoted;
|
|
|
1148 return quoted;
|
|
|
1149 }
|
|
|
1150
|
|
|
1151 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /*
|
|
|
1152 Scan from character number FROM by COUNT lists.
|
|
|
1153 Returns the character number of the position thus found.
|
|
|
1154
|
|
|
1155 If DEPTH is nonzero, paren depth begins counting from that value,
|
|
|
1156 only places where the depth in parentheses becomes zero
|
|
|
1157 are candidates for stopping; COUNT such places are counted.
|
|
|
1158 Thus, a positive value for DEPTH means go out levels.
|
|
|
1159
|
|
|
1160 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1161
|
|
|
1162 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1163 and the depth is wrong, an error is signaled.
|
|
|
1164 If the depth is right but the count is not used up, nil is returned.
|
|
|
1165
|
|
|
1166 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1167 of in the current buffer.
|
|
|
1168
|
|
|
1169 If optional arg NOERROR is non-nil, scan-lists will return nil instead of
|
|
|
1170 signalling an error.
|
|
|
1171 */
|
|
444
|
1172 (from, count, depth, buffer, noerror))
|
|
428
|
1173 {
|
|
|
1174 struct buffer *buf;
|
|
|
1175
|
|
|
1176 CHECK_INT (from);
|
|
|
1177 CHECK_INT (count);
|
|
|
1178 CHECK_INT (depth);
|
|
|
1179 buf = decode_buffer (buffer, 0);
|
|
|
1180
|
|
|
1181 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0,
|
|
444
|
1182 !NILP (noerror));
|
|
428
|
1183 }
|
|
|
1184
|
|
|
1185 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /*
|
|
|
1186 Scan from character number FROM by COUNT balanced expressions.
|
|
|
1187 If COUNT is negative, scan backwards.
|
|
|
1188 Returns the character number of the position thus found.
|
|
|
1189
|
|
|
1190 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
|
|
|
1191
|
|
|
1192 If the beginning or end of (the accessible part of) the buffer is reached
|
|
|
1193 in the middle of a parenthetical grouping, an error is signaled.
|
|
|
1194 If the beginning or end is reached between groupings
|
|
|
1195 but before count is used up, nil is returned.
|
|
|
1196
|
|
|
1197 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead
|
|
|
1198 of in the current buffer.
|
|
|
1199
|
|
|
1200 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of
|
|
|
1201 signalling an error.
|
|
|
1202 */
|
|
444
|
1203 (from, count, buffer, noerror))
|
|
428
|
1204 {
|
|
|
1205 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1206 CHECK_INT (from);
|
|
|
1207 CHECK_INT (count);
|
|
|
1208
|
|
444
|
1209 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (noerror));
|
|
428
|
1210 }
|
|
|
1211
|
|
|
1212 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /*
|
|
|
1213 Move point backward over any number of chars with prefix syntax.
|
|
|
1214 This includes chars with "quote" or "prefix" syntax (' or p).
|
|
|
1215
|
|
|
1216 Optional arg BUFFER defaults to the current buffer.
|
|
|
1217 */
|
|
|
1218 (buffer))
|
|
|
1219 {
|
|
|
1220 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1221 Bufpos beg = BUF_BEGV (buf);
|
|
|
1222 Bufpos pos = BUF_PT (buf);
|
|
440
|
1223 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1224
|
|
|
1225 while (pos > beg && !char_quoted (buf, pos - 1)
|
|
|
1226 && (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1)) == Squote
|
|
|
1227 || SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, pos - 1))))
|
|
|
1228 pos--;
|
|
|
1229
|
|
|
1230 BUF_SET_PT (buf, pos);
|
|
|
1231
|
|
|
1232 return Qnil;
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 /* Parse forward from FROM to END,
|
|
|
1236 assuming that FROM has state OLDSTATE (nil means FROM is start of function),
|
|
|
1237 and return a description of the state of the parse at END.
|
|
|
1238 If STOPBEFORE is nonzero, stop at the start of an atom.
|
|
|
1239 If COMMENTSTOP is nonzero, stop at the start of a comment. */
|
|
|
1240
|
|
|
1241 static void
|
|
|
1242 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr,
|
|
|
1243 Bufpos from, Bufpos end,
|
|
|
1244 int targetdepth, int stopbefore,
|
|
|
1245 Lisp_Object oldstate,
|
|
|
1246 int commentstop)
|
|
|
1247 {
|
|
|
1248 struct lisp_parse_state state;
|
|
|
1249
|
|
|
1250 enum syntaxcode code;
|
|
|
1251 struct level { int last, prev; };
|
|
|
1252 struct level levelstart[100];
|
|
|
1253 struct level *curlevel = levelstart;
|
|
|
1254 struct level *endlevel = levelstart + 100;
|
|
|
1255 int depth; /* Paren depth of current scanning location.
|
|
|
1256 level - levelstart equals this except
|
|
|
1257 when the depth becomes negative. */
|
|
|
1258 int mindepth; /* Lowest DEPTH value seen. */
|
|
|
1259 int start_quoted = 0; /* Nonzero means starting after a char quote */
|
|
|
1260 Lisp_Object tem;
|
|
|
1261 int mask; /* comment mask */
|
|
|
1262 Lisp_Object syntaxtab = buf->syntax_table;
|
|
440
|
1263 Lisp_Char_Table *mirrortab = XCHAR_TABLE (buf->mirror_syntax_table);
|
|
428
|
1264
|
|
|
1265 if (NILP (oldstate))
|
|
|
1266 {
|
|
|
1267 depth = 0;
|
|
|
1268 state.instring = -1;
|
|
|
1269 state.incomment = 0;
|
|
|
1270 state.comstyle = 0; /* comment style a by default */
|
|
|
1271 mask = SYNTAX_COMMENT_STYLE_A;
|
|
|
1272 }
|
|
|
1273 else
|
|
|
1274 {
|
|
|
1275 tem = Fcar (oldstate); /* elt 0, depth */
|
|
|
1276 if (!NILP (tem))
|
|
|
1277 depth = XINT (tem);
|
|
|
1278 else
|
|
|
1279 depth = 0;
|
|
|
1280
|
|
|
1281 oldstate = Fcdr (oldstate);
|
|
|
1282 oldstate = Fcdr (oldstate);
|
|
|
1283 oldstate = Fcdr (oldstate);
|
|
|
1284 tem = Fcar (oldstate); /* elt 3, instring */
|
|
|
1285 state.instring = !NILP (tem) ? XINT (tem) : -1;
|
|
|
1286
|
|
|
1287 oldstate = Fcdr (oldstate); /* elt 4, incomment */
|
|
|
1288 tem = Fcar (oldstate);
|
|
|
1289 state.incomment = !NILP (tem);
|
|
|
1290
|
|
|
1291 oldstate = Fcdr (oldstate);
|
|
|
1292 tem = Fcar (oldstate); /* elt 5, follows-quote */
|
|
|
1293 start_quoted = !NILP (tem);
|
|
|
1294
|
|
|
1295 /* if the eighth element of the list is nil, we are in comment style
|
|
|
1296 a. if it is non-nil, we are in comment style b */
|
|
|
1297 oldstate = Fcdr (oldstate);
|
|
|
1298 oldstate = Fcdr (oldstate);
|
|
|
1299 oldstate = Fcdr (oldstate);
|
|
|
1300 tem = Fcar (oldstate); /* elt 8, comment style a */
|
|
|
1301 state.comstyle = !NILP (tem);
|
|
|
1302 mask = state.comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A;
|
|
|
1303 }
|
|
|
1304 state.quoted = 0;
|
|
|
1305 mindepth = depth;
|
|
|
1306
|
|
|
1307 curlevel->prev = -1;
|
|
|
1308 curlevel->last = -1;
|
|
|
1309
|
|
|
1310 /* Enter the loop at a place appropriate for initial state. */
|
|
|
1311
|
|
|
1312 if (state.incomment) goto startincomment;
|
|
|
1313 if (state.instring >= 0)
|
|
|
1314 {
|
|
|
1315 if (start_quoted) goto startquotedinstring;
|
|
|
1316 goto startinstring;
|
|
|
1317 }
|
|
|
1318 if (start_quoted) goto startquoted;
|
|
|
1319
|
|
|
1320 while (from < end)
|
|
|
1321 {
|
|
|
1322 QUIT;
|
|
|
1323
|
|
|
1324 code = SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from));
|
|
|
1325 from++;
|
|
|
1326
|
|
|
1327 if (code == Scomment)
|
|
|
1328 {
|
|
|
1329 /* record the comment style we have entered so that only the
|
|
|
1330 comment-ender sequence (or single char) of the same style
|
|
|
1331 actually terminates the comment section. */
|
|
|
1332 mask = SYNTAX_COMMENT_1CHAR_MASK (mirrortab,
|
|
|
1333 BUF_FETCH_CHAR (buf, from-1));
|
|
|
1334 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1335 state.comstart = from - 1;
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 else if (from < end &&
|
|
|
1339 SYNTAX_START_P (mirrortab, BUF_FETCH_CHAR (buf, from-1),
|
|
|
1340 BUF_FETCH_CHAR (buf, from)))
|
|
|
1341 {
|
|
|
1342 /* Record the comment style we have entered so that only
|
|
|
1343 the comment-end sequence of the same style actually
|
|
|
1344 terminates the comment section. */
|
|
|
1345 code = Scomment;
|
|
|
1346 mask = SYNTAX_COMMENT_MASK_START (mirrortab,
|
|
|
1347 BUF_FETCH_CHAR (buf, from-1),
|
|
|
1348 BUF_FETCH_CHAR (buf, from));
|
|
|
1349 state.comstyle = (mask == SYNTAX_COMMENT_STYLE_B);
|
|
|
1350 state.comstart = from-1;
|
|
|
1351 from++;
|
|
|
1352 }
|
|
|
1353
|
|
|
1354 if (SYNTAX_PREFIX (mirrortab, BUF_FETCH_CHAR (buf, from - 1)))
|
|
|
1355 continue;
|
|
|
1356 switch (code)
|
|
|
1357 {
|
|
|
1358 case Sescape:
|
|
|
1359 case Scharquote:
|
|
|
1360 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1361 curlevel->last = from - 1;
|
|
|
1362 startquoted:
|
|
|
1363 if (from == end) goto endquoted;
|
|
|
1364 from++;
|
|
|
1365 goto symstarted;
|
|
|
1366 /* treat following character as a word constituent */
|
|
|
1367 case Sword:
|
|
|
1368 case Ssymbol:
|
|
|
1369 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1370 curlevel->last = from - 1;
|
|
|
1371 symstarted:
|
|
|
1372 while (from < end)
|
|
|
1373 {
|
|
|
1374 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
1375 {
|
|
|
1376 case Scharquote:
|
|
|
1377 case Sescape:
|
|
|
1378 from++;
|
|
|
1379 if (from == end) goto endquoted;
|
|
|
1380 break;
|
|
|
1381 case Sword:
|
|
|
1382 case Ssymbol:
|
|
|
1383 case Squote:
|
|
|
1384 break;
|
|
|
1385 default:
|
|
|
1386 goto symdone;
|
|
|
1387 }
|
|
|
1388 from++;
|
|
|
1389 }
|
|
|
1390 symdone:
|
|
|
1391 curlevel->prev = curlevel->last;
|
|
|
1392 break;
|
|
|
1393
|
|
|
1394 case Scomment:
|
|
|
1395 state.incomment = 1;
|
|
|
1396 startincomment:
|
|
|
1397 if (commentstop)
|
|
|
1398 goto done;
|
|
|
1399 {
|
|
|
1400 Bufpos newfrom = find_end_of_comment (buf, from, end, mask);
|
|
|
1401 if (newfrom < 0)
|
|
|
1402 {
|
|
|
1403 /* we terminated search because from == end */
|
|
|
1404 from = end;
|
|
|
1405 goto done;
|
|
|
1406 }
|
|
|
1407 from = newfrom;
|
|
|
1408 }
|
|
|
1409 state.incomment = 0;
|
|
|
1410 state.comstyle = 0; /* reset the comment style */
|
|
|
1411 mask = 0;
|
|
|
1412 break;
|
|
|
1413
|
|
|
1414 case Sopen:
|
|
|
1415 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1416 depth++;
|
|
|
1417 /* curlevel++->last ran into compiler bug on Apollo */
|
|
|
1418 curlevel->last = from - 1;
|
|
|
1419 if (++curlevel == endlevel)
|
|
|
1420 error ("Nesting too deep for parser");
|
|
|
1421 curlevel->prev = -1;
|
|
|
1422 curlevel->last = -1;
|
|
|
1423 if (targetdepth == depth) goto done;
|
|
|
1424 break;
|
|
|
1425
|
|
|
1426 case Sclose:
|
|
|
1427 depth--;
|
|
|
1428 if (depth < mindepth)
|
|
|
1429 mindepth = depth;
|
|
|
1430 if (curlevel != levelstart)
|
|
|
1431 curlevel--;
|
|
|
1432 curlevel->prev = curlevel->last;
|
|
|
1433 if (targetdepth == depth) goto done;
|
|
|
1434 break;
|
|
|
1435
|
|
|
1436 case Sstring:
|
|
|
1437 {
|
|
|
1438 Emchar ch;
|
|
|
1439 if (stopbefore) goto stop; /* this arg means stop at sexp start */
|
|
|
1440 curlevel->last = from - 1;
|
|
|
1441 /* XEmacs change: call syntax_match() on character */
|
|
|
1442 ch = BUF_FETCH_CHAR (buf, from - 1);
|
|
|
1443 {
|
|
|
1444 Lisp_Object stermobj = syntax_match (syntaxtab, ch);
|
|
|
1445
|
|
|
1446 if (CHARP (stermobj))
|
|
|
1447 state.instring = XCHAR (stermobj);
|
|
|
1448 else
|
|
|
1449 state.instring = ch;
|
|
|
1450 }
|
|
|
1451 }
|
|
|
1452 startinstring:
|
|
|
1453 while (1)
|
|
|
1454 {
|
|
|
1455 if (from >= end) goto done;
|
|
|
1456 if (BUF_FETCH_CHAR (buf, from) == state.instring) break;
|
|
|
1457 switch (SYNTAX (mirrortab, BUF_FETCH_CHAR (buf, from)))
|
|
|
1458 {
|
|
|
1459 case Scharquote:
|
|
|
1460 case Sescape:
|
|
|
1461 {
|
|
|
1462 from++;
|
|
|
1463 startquotedinstring:
|
|
|
1464 if (from >= end) goto endquoted;
|
|
|
1465 break;
|
|
|
1466 }
|
|
|
1467 default:
|
|
|
1468 break;
|
|
|
1469 }
|
|
|
1470 from++;
|
|
|
1471 }
|
|
|
1472 state.instring = -1;
|
|
|
1473 curlevel->prev = curlevel->last;
|
|
|
1474 from++;
|
|
|
1475 break;
|
|
|
1476
|
|
|
1477 case Smath:
|
|
|
1478 break;
|
|
|
1479
|
|
|
1480 case Swhitespace:
|
|
|
1481 case Spunct:
|
|
|
1482 case Squote:
|
|
|
1483 case Sendcomment:
|
|
|
1484 case Sinherit:
|
|
|
1485 case Smax:
|
|
|
1486 break;
|
|
|
1487 }
|
|
|
1488 }
|
|
|
1489 goto done;
|
|
|
1490
|
|
|
1491 stop: /* Here if stopping before start of sexp. */
|
|
|
1492 from--; /* We have just fetched the char that starts it; */
|
|
|
1493 goto done; /* but return the position before it. */
|
|
|
1494
|
|
|
1495 endquoted:
|
|
|
1496 state.quoted = 1;
|
|
|
1497 done:
|
|
|
1498 state.depth = depth;
|
|
|
1499 state.mindepth = mindepth;
|
|
|
1500 state.thislevelstart = curlevel->prev;
|
|
|
1501 state.prevlevelstart
|
|
|
1502 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last;
|
|
|
1503 state.location = from;
|
|
|
1504
|
|
|
1505 *stateptr = state;
|
|
|
1506 }
|
|
|
1507
|
|
|
1508 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /*
|
|
|
1509 Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
|
|
|
1510 Parsing stops at TO or when certain criteria are met;
|
|
|
1511 point is set to where parsing stops.
|
|
444
|
1512 If fifth arg OLDSTATE is omitted or nil,
|
|
428
|
1513 parsing assumes that FROM is the beginning of a function.
|
|
|
1514 Value is a list of eight elements describing final state of parsing:
|
|
|
1515 0. depth in parens.
|
|
|
1516 1. character address of start of innermost containing list; nil if none.
|
|
|
1517 2. character address of start of last complete sexp terminated.
|
|
|
1518 3. non-nil if inside a string.
|
|
|
1519 (It is the character that will terminate the string.)
|
|
|
1520 4. t if inside a comment.
|
|
|
1521 5. t if following a quote character.
|
|
|
1522 6. the minimum paren-depth encountered during this scan.
|
|
|
1523 7. nil if in comment style a, or not in a comment; t if in comment style b
|
|
|
1524 If third arg TARGETDEPTH is non-nil, parsing stops if the depth
|
|
|
1525 in parentheses becomes equal to TARGETDEPTH.
|
|
|
1526 Fourth arg STOPBEFORE non-nil means stop when come to
|
|
|
1527 any character that starts a sexp.
|
|
444
|
1528 Fifth arg OLDSTATE is an eight-element list like what this function returns.
|
|
428
|
1529 It is used to initialize the state of the parse. Its second and third
|
|
|
1530 elements are ignored.
|
|
|
1531 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.
|
|
|
1532 */
|
|
|
1533 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer))
|
|
|
1534 {
|
|
|
1535 struct lisp_parse_state state;
|
|
|
1536 int target;
|
|
|
1537 Bufpos start, end;
|
|
|
1538 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1539 Lisp_Object val;
|
|
|
1540
|
|
|
1541 if (!NILP (targetdepth))
|
|
|
1542 {
|
|
|
1543 CHECK_INT (targetdepth);
|
|
|
1544 target = XINT (targetdepth);
|
|
|
1545 }
|
|
|
1546 else
|
|
|
1547 target = -100000; /* We won't reach this depth */
|
|
|
1548
|
|
|
1549 get_buffer_range_char (buf, from, to, &start, &end, 0);
|
|
|
1550 scan_sexps_forward (buf, &state, start, end,
|
|
|
1551 target, !NILP (stopbefore), oldstate,
|
|
|
1552 !NILP (commentstop));
|
|
|
1553
|
|
|
1554 BUF_SET_PT (buf, state.location);
|
|
|
1555
|
|
|
1556 /* reverse order */
|
|
|
1557 val = Qnil;
|
|
|
1558 val = Fcons (state.comstyle ? Qt : Qnil, val);
|
|
|
1559 val = Fcons (make_int (state.mindepth), val);
|
|
|
1560 val = Fcons (state.quoted ? Qt : Qnil, val);
|
|
|
1561 val = Fcons (state.incomment ? Qt : Qnil, val);
|
|
|
1562 val = Fcons (state.instring < 0 ? Qnil : make_int (state.instring), val);
|
|
|
1563 val = Fcons (state.thislevelstart < 0 ? Qnil : make_int (state.thislevelstart), val);
|
|
|
1564 val = Fcons (state.prevlevelstart < 0 ? Qnil : make_int (state.prevlevelstart), val);
|
|
|
1565 val = Fcons (make_int (state.depth), val);
|
|
|
1566
|
|
|
1567 return val;
|
|
|
1568 }
|
|
|
1569
|
|
|
1570
|
|
|
1571 /* Updating of the mirror syntax table.
|
|
|
1572
|
|
|
1573 Each syntax table has a corresponding mirror table in it.
|
|
|
1574 Whenever we make a change to a syntax table, we call
|
|
|
1575 update_syntax_table() on it.
|
|
|
1576
|
|
|
1577 #### We really only need to map over the changed range.
|
|
|
1578
|
|
|
1579 If we change the standard syntax table, we need to map over
|
|
|
1580 all tables because any of them could be inheriting from the
|
|
|
1581 standard syntax table.
|
|
|
1582
|
|
|
1583 When `set-syntax-table' is called, we set the buffer's mirror
|
|
|
1584 syntax table as well.
|
|
|
1585 */
|
|
|
1586
|
|
|
1587 struct cmst_arg
|
|
|
1588 {
|
|
|
1589 Lisp_Object mirrortab;
|
|
|
1590 int check_inherit;
|
|
|
1591 };
|
|
|
1592
|
|
|
1593 static int
|
|
|
1594 cmst_mapfun (struct chartab_range *range, Lisp_Object val, void *arg)
|
|
|
1595 {
|
|
|
1596 struct cmst_arg *closure = (struct cmst_arg *) arg;
|
|
|
1597
|
|
|
1598 if (CONSP (val))
|
|
|
1599 val = XCAR (val);
|
|
|
1600 if (SYNTAX_FROM_CODE (XINT (val)) == Sinherit
|
|
|
1601 && closure->check_inherit)
|
|
|
1602 {
|
|
|
1603 struct cmst_arg recursive;
|
|
|
1604
|
|
|
1605 recursive.mirrortab = closure->mirrortab;
|
|
|
1606 recursive.check_inherit = 0;
|
|
|
1607 map_char_table (XCHAR_TABLE (Vstandard_syntax_table), range,
|
|
|
1608 cmst_mapfun, &recursive);
|
|
|
1609 }
|
|
|
1610 else
|
|
|
1611 put_char_table (XCHAR_TABLE (closure->mirrortab), range, val);
|
|
|
1612 return 0;
|
|
|
1613 }
|
|
|
1614
|
|
|
1615 static void
|
|
440
|
1616 update_just_this_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
1617 {
|
|
|
1618 struct chartab_range range;
|
|
|
1619 struct cmst_arg arg;
|
|
|
1620
|
|
|
1621 arg.mirrortab = ct->mirror_table;
|
|
|
1622 arg.check_inherit = (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1623 && ct != XCHAR_TABLE (Vstandard_syntax_table));
|
|
|
1624 range.type = CHARTAB_RANGE_ALL;
|
|
|
1625 map_char_table (ct, &range, cmst_mapfun, &arg);
|
|
|
1626 }
|
|
|
1627
|
|
|
1628 /* Called from chartab.c when a change is made to a syntax table.
|
|
|
1629 If this is the standard syntax table, we need to recompute
|
|
|
1630 *all* syntax tables (yuck). Otherwise we just recompute this
|
|
|
1631 one. */
|
|
|
1632
|
|
|
1633 void
|
|
440
|
1634 update_syntax_table (Lisp_Char_Table *ct)
|
|
428
|
1635 {
|
|
|
1636 /* Don't be stymied at startup. */
|
|
|
1637 if (CHAR_TABLEP (Vstandard_syntax_table)
|
|
|
1638 && ct == XCHAR_TABLE (Vstandard_syntax_table))
|
|
|
1639 {
|
|
|
1640 Lisp_Object syntab;
|
|
|
1641
|
|
|
1642 for (syntab = Vall_syntax_tables; !NILP (syntab);
|
|
|
1643 syntab = XCHAR_TABLE (syntab)->next_table)
|
|
|
1644 update_just_this_syntax_table (XCHAR_TABLE (syntab));
|
|
|
1645 }
|
|
|
1646 else
|
|
|
1647 update_just_this_syntax_table (ct);
|
|
|
1648 }
|
|
|
1649
|
|
|
1650
|
|
|
1651 /************************************************************************/
|
|
|
1652 /* initialization */
|
|
|
1653 /************************************************************************/
|
|
|
1654
|
|
|
1655 void
|
|
|
1656 syms_of_syntax (void)
|
|
|
1657 {
|
|
|
1658 defsymbol (&Qsyntax_table_p, "syntax-table-p");
|
|
|
1659
|
|
|
1660 DEFSUBR (Fsyntax_table_p);
|
|
|
1661 DEFSUBR (Fsyntax_table);
|
|
|
1662 DEFSUBR (Fstandard_syntax_table);
|
|
|
1663 DEFSUBR (Fcopy_syntax_table);
|
|
|
1664 DEFSUBR (Fset_syntax_table);
|
|
|
1665 DEFSUBR (Fsyntax_designator_chars);
|
|
|
1666 DEFSUBR (Fchar_syntax);
|
|
|
1667 DEFSUBR (Fmatching_paren);
|
|
|
1668 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */
|
|
|
1669 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */
|
|
|
1670
|
|
|
1671 DEFSUBR (Fforward_word);
|
|
|
1672
|
|
|
1673 DEFSUBR (Fforward_comment);
|
|
|
1674 DEFSUBR (Fscan_lists);
|
|
|
1675 DEFSUBR (Fscan_sexps);
|
|
|
1676 DEFSUBR (Fbackward_prefix_chars);
|
|
|
1677 DEFSUBR (Fparse_partial_sexp);
|
|
|
1678 }
|
|
|
1679
|
|
|
1680 void
|
|
|
1681 vars_of_syntax (void)
|
|
|
1682 {
|
|
|
1683 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /*
|
|
|
1684 Non-nil means `forward-sexp', etc., should treat comments as whitespace.
|
|
|
1685 */ );
|
|
434
|
1686 parse_sexp_ignore_comments = 0;
|
|
428
|
1687
|
|
|
1688 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /*
|
|
|
1689 Non-nil means `forward-word', etc., should treat escape chars part of words.
|
|
|
1690 */ );
|
|
434
|
1691 words_include_escapes = 0;
|
|
428
|
1692
|
|
|
1693 no_quit_in_re_search = 0;
|
|
|
1694 }
|
|
|
1695
|
|
|
1696 static void
|
|
442
|
1697 define_standard_syntax (const char *p, enum syntaxcode syn)
|
|
428
|
1698 {
|
|
|
1699 for (; *p; p++)
|
|
|
1700 Fput_char_table (make_char (*p), make_int (syn), Vstandard_syntax_table);
|
|
|
1701 }
|
|
|
1702
|
|
|
1703 void
|
|
|
1704 complex_vars_of_syntax (void)
|
|
|
1705 {
|
|
|
1706 Emchar i;
|
|
442
|
1707 const char *p;
|
|
428
|
1708 /* Set this now, so first buffer creation can refer to it. */
|
|
|
1709 /* Make it nil before calling copy-syntax-table
|
|
|
1710 so that copy-syntax-table will know not to try to copy from garbage */
|
|
|
1711 Vstandard_syntax_table = Qnil;
|
|
|
1712 Vstandard_syntax_table = Fcopy_syntax_table (Qnil);
|
|
|
1713 staticpro (&Vstandard_syntax_table);
|
|
|
1714
|
|
|
1715 Vsyntax_designator_chars_string = make_string_nocopy (syntax_code_spec,
|
|
|
1716 Smax);
|
|
|
1717 staticpro (&Vsyntax_designator_chars_string);
|
|
|
1718
|
|
|
1719 fill_char_table (XCHAR_TABLE (Vstandard_syntax_table), make_int (Spunct));
|
|
|
1720
|
|
|
1721 for (i = 0; i <= 32; i++) /* Control 0 plus SPACE */
|
|
|
1722 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
1723 Vstandard_syntax_table);
|
|
|
1724 for (i = 127; i <= 159; i++) /* DEL plus Control 1 */
|
|
|
1725 Fput_char_table (make_char (i), make_int (Swhitespace),
|
|
|
1726 Vstandard_syntax_table);
|
|
|
1727
|
|
|
1728 define_standard_syntax ("abcdefghijklmnopqrstuvwxyz"
|
|
|
1729 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
1730 "0123456789"
|
|
|
1731 "$%", Sword);
|
|
|
1732 define_standard_syntax ("\"", Sstring);
|
|
|
1733 define_standard_syntax ("\\", Sescape);
|
|
|
1734 define_standard_syntax ("_-+*/&|<>=", Ssymbol);
|
|
|
1735 define_standard_syntax (".,;:?!#@~^'`", Spunct);
|
|
|
1736
|
|
|
1737 for (p = "()[]{}"; *p; p+=2)
|
|
|
1738 {
|
|
|
1739 Fput_char_table (make_char (p[0]),
|
|
|
1740 Fcons (make_int (Sopen), make_char (p[1])),
|
|
|
1741 Vstandard_syntax_table);
|
|
|
1742 Fput_char_table (make_char (p[1]),
|
|
|
1743 Fcons (make_int (Sclose), make_char (p[0])),
|
|
|
1744 Vstandard_syntax_table);
|
|
|
1745 }
|
|
|
1746 }
|
