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