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1 ;;; c-mode.el --- C code editing commands for Emacs
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2 ;; Copyright (C) 1985, 86, 87, 92, 94, 95 Free Software Foundation, Inc.
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3
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4 ;; Maintainer: FSF
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5 ;; Keywords: c
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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22
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23 ;;; Synched up with: FSF 19.30.
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24
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25 ;;; Commentary:
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26
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27 ;; A smart editing mode for C code. It knows a lot about C syntax and tries
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28 ;; to position the cursor according to C layout conventions. You can
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29 ;; change the details of the layout style with option variables. Load it
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30 ;; and do M-x describe-mode for details.
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31
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32 ;;; Code:
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33
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34 (defvar c-mode-abbrev-table nil
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35 "Abbrev table in use in C mode.")
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36 (define-abbrev-table 'c-mode-abbrev-table ())
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37
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38 (defvar c-mode-map ()
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39 "Keymap used in C mode.")
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40 ;; XEmacs change: if cc-mode is loaded, then override its keymap.
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41 ;; otherwise things will be really screwed up.
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42 (if (or (null c-mode-map) (featurep 'cc-mode))
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43 (progn
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44 (setq c-mode-map (make-sparse-keymap))
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45 (set-keymap-name c-mode-map 'c-mode-map)
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46 (define-key c-mode-map "{" 'electric-c-brace)
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47 (define-key c-mode-map "}" 'electric-c-brace)
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48 (define-key c-mode-map ";" 'electric-c-semi)
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49 (define-key c-mode-map "#" 'electric-c-sharp-sign)
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50 (define-key c-mode-map ":" 'electric-c-terminator)
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51 (define-key c-mode-map "\e{" 'c-insert-braces)
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52 ;; Commented out electric square brackets because nobody likes them.
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53 ;;(define-key c-mode-map "[" 'c-insert-brackets)
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54 (define-key c-mode-map "\e\C-h" 'mark-c-function)
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55 (define-key c-mode-map "\e\C-q" 'indent-c-exp)
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56 (define-key c-mode-map "\ea" 'c-beginning-of-statement)
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57 (define-key c-mode-map "\ee" 'c-end-of-statement)
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58 (define-key c-mode-map "\C-c\C-n" 'c-forward-conditional)
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59 (define-key c-mode-map "\C-c\C-p" 'c-backward-conditional)
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60 (define-key c-mode-map "\C-c\C-u" 'c-up-conditional)
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61 (define-key c-mode-map "\177" 'backward-delete-char-untabify)
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62 (define-key c-mode-map "\t" 'c-indent-command)))
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63
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64 (defvar c-mode-popup-menu
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65 (purecopy '("C Menu"
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66 ["Comment Out Region" comment-region (region-exists-p)]
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67 ["Macro Expand Region" c-macro-expand (region-exists-p)]
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68 ["Backslashify" c-backslash-region (region-exists-p)]
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69 "---"
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70 ["Indent Expression" indent-c-exp t]
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71 ["Indent Line" c-indent-command t]
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72 ["Fill Comment Paragraph" c-fill-paragraph t]
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73 "---"
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74 ["Highlight Conditionals" cpp-highlight-buffer t]
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75 ["Up Conditional" c-up-conditional t]
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76 ["Backward Conditional" c-backward-conditional t]
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77 ["Forward Conditional" c-forward-conditional t]
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78 "---"
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79 ["Backward Statement" c-beginning-of-statement t]
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80 ["Forward Statement" c-end-of-statement t]
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81 )))
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82
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83 (defvar c-mode-menubar-menu
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84 (purecopy (cons "C" (cdr c-mode-popup-menu))))
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85
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86 ;; cmacexp is lame because it uses no preprocessor symbols.
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87 ;; It isn't very extensible either -- hardcodes /lib/cpp.
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88 (autoload 'c-macro-expand "cmacexp"
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89 "Display the result of expanding all C macros occurring in the region.
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90 The expansion is entirely correct because it uses the C preprocessor."
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91 t)
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92
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93 (defvar c-mode-syntax-table nil
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94 "Syntax table in use in C-mode buffers.")
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95
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96 (if c-mode-syntax-table
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97 ()
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98 (setq c-mode-syntax-table (make-syntax-table))
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99 (modify-syntax-entry ?\\ "\\" c-mode-syntax-table)
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100 (modify-syntax-entry ?/ ". 14" c-mode-syntax-table)
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101 (modify-syntax-entry ?* ". 23" c-mode-syntax-table)
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102 (modify-syntax-entry ?+ "." c-mode-syntax-table)
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103 (modify-syntax-entry ?- "." c-mode-syntax-table)
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104 (modify-syntax-entry ?= "." c-mode-syntax-table)
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105 (modify-syntax-entry ?% "." c-mode-syntax-table)
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106 (modify-syntax-entry ?< "." c-mode-syntax-table)
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107 (modify-syntax-entry ?> "." c-mode-syntax-table)
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108 (modify-syntax-entry ?& "." c-mode-syntax-table)
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109 (modify-syntax-entry ?| "." c-mode-syntax-table)
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110 (modify-syntax-entry ?\' "\"" c-mode-syntax-table))
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111
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112 (defvar c-indent-level 2
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113 "*Indentation of C statements with respect to containing block.")
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114 (defvar c-brace-imaginary-offset 0
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115 "*Imagined indentation of a C open brace that actually follows a statement.")
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116 (defvar c-brace-offset 0
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117 "*Extra indentation for braces, compared with other text in same context.")
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118 (defvar c-argdecl-indent 5
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119 "*Indentation level of declarations of C function arguments.")
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120 (defvar c-label-offset -2
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121 "*Offset of C label lines and case statements relative to usual indentation.")
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122 (defvar c-continued-statement-offset 2
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123 "*Extra indent for lines not starting new statements.")
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124 (defvar c-continued-brace-offset 0
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125 "*Extra indent for substatements that start with open-braces.
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126 This is in addition to `c-continued-statement-offset'.")
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127 (defconst c-style-alist
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128 '(("GNU"
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129 (c-indent-level . 2)
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130 (c-argdecl-indent . 5)
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131 (c-brace-offset . 0)
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132 (c-continued-brace-offset . 0)
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133 (c-label-offset . -2)
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134 (c-continued-statement-offset . 2))
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135 ("K&R"
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136 (c-indent-level . 5)
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137 (c-argdecl-indent . 0)
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138 (c-brace-offset . 0)
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139 (c-continued-brace-offset . -5)
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140 (c-label-offset . -5)
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141 (c-continued-statement-offset . 5))
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142 ("BSD"
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143 (c-indent-level . 4)
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144 (c-argdecl-indent . 4)
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145 (c-brace-offset . 0)
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146 (c-continued-brace-offset . -4)
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147 (c-label-offset . -4)
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148 (c-continued-statement-offset . 4))
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149 ("C++"
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150 (c-indent-level . 4)
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151 (c-argdecl-indent . 0)
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152 (c-brace-offset . 0)
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153 (c-continued-brace-offset . -4)
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154 (c-label-offset . -4)
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155 (c-continued-statement-offset . 4)
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156 (c-auto-newline . t))
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157 ("Whitesmith"
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158 (c-indent-level . 4)
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159 (c-argdecl-indent . 4)
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160 (c-brace-offset . 0)
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161 (c-continued-brace-offset . 0)
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162 (c-label-offset . -4)
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163 (c-continued-statement-offset . 4))))
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164
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165 (defvar c-auto-newline nil
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166 "*Non-nil means automatically newline before and after braces,
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167 and after colons and semicolons, inserted in C code.
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168 If you do not want a leading newline before braces then use:
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169 (define-key c-mode-map \"{\" 'electric-c-semi)")
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170
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171 (defvar c-tab-always-indent t
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172 "*Non-nil means TAB in C mode should always reindent the current line,
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173 regardless of where in the line point is when the TAB command is used.")
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174
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175 ;;; Regular expression used internally to recognize labels in switch
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176 ;;; statements.
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177 (defvar c-switch-label-regexp (purecopy "case[ \t'/(]\\|default[ \t]*:"))
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178
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179 ;;; This is actually the expression for C++ mode, but it's used for C too.
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180 ;(defvar c-imenu-generic-expression
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181 ; (`
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182 ; ((nil
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183 ; (,
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184 ; (concat
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185 ; "^" ; beginning of line is required
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186 ; "\\(template[ \t]*<[^>]+>[ \t]*\\)?" ; there may be a "template <...>"
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187 ; "\\([a-zA-Z0-9_:]+[ \t]+\\)?" ; type specs; there can be no
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188 ; "\\([a-zA-Z0-9_:]+[ \t]+\\)?" ; more than 3 tokens, right?
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189 ;
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190 ; "\\(" ; last type spec including */&
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191 ; "[a-zA-Z0-9_:]+"
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192 ; "\\([ \t]*[*&]+[ \t]*\\|[ \t]+\\)" ; either pointer/ref sign or whitespace
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193 ; "\\)?" ; if there is a last type spec
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194 ; "\\(" ; name; take that into the imenu entry
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195 ; "[a-zA-Z0-9_:~]+" ; member function, ctor or dtor...
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196 ; ; (may not contain * because then
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197 ; ; "a::operator char*" would become "char*"!)
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198 ; "\\|"
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199 ; "\\([a-zA-Z0-9_:~]*::\\)?operator"
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200 ; "[^a-zA-Z1-9_][^(]*" ; ...or operator
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201 ; " \\)"
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202 ; "[ \t]*([^)]*)[ \t\n]*[^ ;]" ; require something other than a ; after
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203 ; ; the (...) to avoid prototypes. Can't
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204 ; ; catch cases with () inside the parentheses
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205 ; ; surrounding the parameters
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206 ; ; (like "int foo(int a=bar()) {...}"
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207 ;
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208 ; )) 6)
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209 ; ("Class"
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210 ; (, (concat
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211 ; "^" ; beginning of line is required
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212 ; "\\(template[ \t]*<[^>]+>[ \t]*\\)?" ; there may be a "template <...>"
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213 ; "class[ \t]+"
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214 ; "\\([a-zA-Z0-9_]+\\)" ; this is the string we want to get
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215 ; "[ \t]*[:{]"
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216 ; )) 2)
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217 ;;; Example of generic expression for finding prototypes, structs, unions, enums.
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218 ;;; Uncomment if you want to find these too. It will be a bit slower gathering
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219 ;;; the indexes.
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220 ;; ("Prototypes"
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221 ;; (,
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222 ;; (concat
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223 ;; "^" ; beginning of line is required
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224 ;; "\\(template[ \t]*<[^>]+>[ \t]*\\)?" ; there may be a "template <...>"
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225 ;; "\\([a-zA-Z0-9_:]+[ \t]+\\)?" ; type specs; there can be no
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226 ;; "\\([a-zA-Z0-9_:]+[ \t]+\\)?" ; more than 3 tokens, right?
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227 ;
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228 ;; "\\(" ; last type spec including */&
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229 ;; "[a-zA-Z0-9_:]+"
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230 ;; "\\([ \t]*[*&]+[ \t]*\\|[ \t]+\\)" ; either pointer/ref sign or whitespace
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231 ;; "\\)?" ; if there is a last type spec
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232 ;; "\\(" ; name; take that into the imenu entry
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233 ;; "[a-zA-Z0-9_:~]+" ; member function, ctor or dtor...
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234 ;; ; (may not contain * because then
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235 ;; ; "a::operator char*" would become "char*"!)
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236 ;; "\\|"
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237 ;; "\\([a-zA-Z0-9_:~]*::\\)?operator"
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238 ;; "[^a-zA-Z1-9_][^(]*" ; ...or operator
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239 ;; " \\)"
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240 ;; "[ \t]*([^)]*)[ \t\n]*;" ; require ';' after
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241 ;; ; the (...) Can't
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242 ;; ; catch cases with () inside the parentheses
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243 ;; ; surrounding the parameters
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244 ;; ; (like "int foo(int a=bar());"
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245 ;; )) 6)
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246 ;; ("Struct"
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247 ;; (, (concat
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248 ;; "^" ; beginning of line is required
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249 ;; "\\(static[ \t]+\\)?" ; there may be static or const.
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250 ;; "\\(const[ \t]+\\)?"
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251 ;; "struct[ \t]+"
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252 ;; "\\([a-zA-Z0-9_]+\\)" ; this is the string we want to get
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253 ;; "[ \t]*[{]"
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254 ;; )) 3)
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255 ;; ("Enum"
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256 ;; (, (concat
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257 ;; "^" ; beginning of line is required
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258 ;; "\\(static[ \t]+\\)?" ; there may be static or const.
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259 ;; "\\(const[ \t]+\\)?"
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260 ;; "enum[ \t]+"
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261 ;; "\\([a-zA-Z0-9_]+\\)" ; this is the string we want to get
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262 ;; "[ \t]*[{]"
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263 ;; )) 3)
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264 ;; ("Union"
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265 ;; (, (concat
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266 ;; "^" ; beginning of line is required
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267 ;; "\\(static[ \t]+\\)?" ; there may be static or const.
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268 ;; "\\(const[ \t]+\\)?"
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269 ;; "union[ \t]+"
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270 ;; "\\([a-zA-Z0-9_]+\\)" ; this is the string we want to get
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271 ;; "[ \t]*[{]"
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272 ;; )) 3)
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273 ; ))
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274 ; "Imenu generic expression for C mode. See `imenu-generic-expression'.")
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275
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276 (defun c-mode ()
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277 "Major mode for editing C code.
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278 Expression and list commands understand all C brackets.
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279 Tab indents for C code.
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280 Comments are delimited with /* ... */.
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281 Paragraphs are separated by blank lines only.
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282 Delete converts tabs to spaces as it moves back.
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283 \\{c-mode-map}
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284 Variables controlling indentation style:
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285 c-tab-always-indent
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286 Non-nil means TAB in C mode should always reindent the current line,
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287 regardless of where in the line point is when the TAB command is used.
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288 c-auto-newline
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289 Non-nil means automatically newline before and after braces,
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290 and after colons and semicolons, inserted in C code.
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291 c-indent-level
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292 Indentation of C statements within surrounding block.
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293 The surrounding block's indentation is the indentation
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294 of the line on which the open-brace appears.
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295 c-continued-statement-offset
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296 Extra indentation given to a substatement, such as the
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297 then-clause of an if or body of a while.
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298 c-continued-brace-offset
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299 Extra indentation given to a brace that starts a substatement.
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300 This is in addition to c-continued-statement-offset.
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301 c-brace-offset
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302 Extra indentation for line if it starts with an open brace.
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303 c-brace-imaginary-offset
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304 An open brace following other text is treated as if it were
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305 this far to the right of the start of its line.
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306 c-argdecl-indent
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307 Indentation level of declarations of C function arguments.
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308 c-label-offset
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309 Extra indentation for line that is a label, or case or default.
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310
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311 Settings for K&R and BSD indentation styles are
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312 c-indent-level 5 8
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313 c-continued-statement-offset 5 8
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314 c-brace-offset -5 -8
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315 c-argdecl-indent 0 8
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316 c-label-offset -5 -8
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317
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318 Turning on C mode calls the value of the variable c-mode-hook with no args,
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319 if that value is non-nil."
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320 (interactive)
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321 (kill-all-local-variables)
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322 (use-local-map c-mode-map)
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323 (setq major-mode 'c-mode)
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324 (setq mode-popup-menu c-mode-popup-menu)
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325 (setq mode-name "C")
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326 (setq local-abbrev-table c-mode-abbrev-table)
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327 (set-syntax-table c-mode-syntax-table)
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328 (make-local-variable 'paragraph-start)
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329 (setq paragraph-start (concat "$\\|" page-delimiter))
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330 (make-local-variable 'paragraph-separate)
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331 (setq paragraph-separate paragraph-start)
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332 (make-local-variable 'paragraph-ignore-fill-prefix)
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333 (setq paragraph-ignore-fill-prefix t)
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334 (make-local-variable 'fill-paragraph-function)
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335 (setq fill-paragraph-function 'c-fill-paragraph)
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336 (make-local-variable 'indent-line-function)
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337 (setq indent-line-function 'c-indent-line)
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338 (make-local-variable 'indent-region-function)
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339 (setq indent-region-function 'c-indent-region)
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340 (make-local-variable 'require-final-newline)
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341 (setq require-final-newline t)
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342 (make-local-variable 'outline-regexp)
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343 (setq outline-regexp "[^#\n\^M]")
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344 (make-local-variable 'outline-level)
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345 (setq outline-level 'c-outline-level)
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346 (make-local-variable 'comment-start)
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347 (setq comment-start "/* ")
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348 (make-local-variable 'comment-end)
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349 (setq comment-end " */")
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350 (make-local-variable 'comment-column)
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351 (setq comment-column 32)
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352 (make-local-variable 'comment-start-skip)
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353 (setq comment-start-skip "/\\*+ *")
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354 (make-local-variable 'comment-indent-function)
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355 (setq comment-indent-function 'c-comment-indent)
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356 (make-local-variable 'comment-multi-line)
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357 (setq comment-multi-line t)
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358 (make-local-variable 'parse-sexp-ignore-comments)
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359 (setq parse-sexp-ignore-comments t)
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360 (if (featurep 'menubar)
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361 (progn
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362 ;; make a local copy of the menubar, so our modes don't
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363 ;; change the global menubar
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364 (set-buffer-menubar current-menubar)
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365 (add-submenu nil c-mode-menubar-menu)))
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366 ; (make-local-variable 'imenu-generic-expression)
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367 ; (setq imenu-generic-expression c-imenu-generic-expression)
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368 (run-hooks 'c-mode-hook))
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369
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370 (defun c-outline-level ()
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371 (save-excursion
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372 (skip-chars-forward "\t ")
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373 (current-column)))
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374 ^L
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375 ;; This is used by indent-for-comment
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376 ;; to decide how much to indent a comment in C code
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377 ;; based on its context.
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378 (defun c-comment-indent ()
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379 (if (looking-at "^/\\*")
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380 0 ;Existing comment at bol stays there.
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381 (let ((opoint (point)))
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382 (save-excursion
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383 (beginning-of-line)
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384 (cond ((looking-at "[ \t]*}[ \t]*\\($\\|/\\*\\)")
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385 ;; A comment following a solitary close-brace
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386 ;; should have only one space.
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387 (search-forward "}")
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388 (1+ (current-column)))
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389 ((or (looking-at "^#[ \t]*endif[ \t]*")
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390 (looking-at "^#[ \t]*else[ \t]*"))
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391 7) ;2 spaces after #endif
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392 ((progn
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393 (goto-char opoint)
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394 (skip-chars-backward " \t")
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395 (and (= comment-column 0) (bolp)))
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396 ;; If comment-column is 0, and nothing but space
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397 ;; before the comment, align it at 0 rather than 1.
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398 0)
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399 (t
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400 (max (1+ (current-column)) ;Else indent at comment column
|
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401 comment-column))))))) ; except leave at least one space.
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402
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|
403 (defun c-fill-paragraph (&optional arg)
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404 "Like \\[fill-paragraph] but handle C comments.
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405 If any of the current line is a comment or within a comment,
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406 fill the comment or the paragraph of it that point is in,
|
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407 preserving the comment indentation or line-starting decorations."
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408 (interactive "P")
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|
409 (let* (comment-start-place
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410 (first-line
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411 ;; Check for obvious entry to comment.
|
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|
412 (save-excursion
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413 (beginning-of-line)
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414 (skip-chars-forward " \t\n")
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|
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415 (and (looking-at comment-start-skip)
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|
416 (setq comment-start-place (point))))))
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|
417 (if (and (eq major-mode 'c++-mode)
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|
418 (save-excursion
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419 (beginning-of-line)
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|
420 (looking-at ".*//")))
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|
421 (let (fill-prefix
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422 (paragraph-start
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|
423 ;; Lines containing just a comment start or just an end
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|
|
424 ;; should not be filled into paragraphs they are next to.
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|
|
425 (concat
|
|
|
426 paragraph-start
|
|
|
427 "\\|[ \t]*/\\*[ \t]*$\\|[ \t]*\\*/[ \t]*$\\|[ \t/*]*$"))
|
|
|
428 (paragraph-separate
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|
|
429 (concat
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|
|
430 paragraph-separate
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|
|
431 "\\|[ \t]*/\\*[ \t]*$\\|[ \t]*\\*/[ \t]*$\\|[ \t/*]*$")))
|
|
|
432 (save-excursion
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|
|
433 (beginning-of-line)
|
|
|
434 ;; Move up to first line of this comment.
|
|
|
435 (while (and (not (bobp)) (looking-at "[ \t]*//"))
|
|
|
436 (forward-line -1))
|
|
|
437 (if (not (looking-at ".*//"))
|
|
|
438 (forward-line 1))
|
|
|
439 ;; Find the comment start in this line.
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|
|
440 (re-search-forward "[ \t]*//[ \t]*")
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|
|
441 ;; Set the fill-prefix to be what all lines except the first
|
|
|
442 ;; should start with.
|
|
|
443 (let ((endcol (current-column)))
|
|
|
444 (skip-chars-backward " \t")
|
|
|
445 (setq fill-prefix
|
|
|
446 (concat (make-string (- (current-column) 2) ?\ )
|
|
|
447 "//"
|
|
|
448 (make-string (- endcol (current-column)) ?\ ))))
|
|
|
449 (save-restriction
|
|
|
450 ;; Narrow down to just the lines of this comment.
|
|
|
451 (narrow-to-region (point)
|
|
|
452 (save-excursion
|
|
|
453 (forward-line 1)
|
|
|
454 (while (looking-at "[ \t]*//")
|
|
|
455 (forward-line 1))
|
|
|
456 (point)))
|
|
|
457 (insert fill-prefix)
|
|
|
458 (fill-paragraph arg)
|
|
|
459 (delete-region (point-min)
|
|
|
460 (+ (point-min) (length fill-prefix))))))
|
|
|
461 (if (or first-line
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|
|
462 ;; t if we enter a comment between start of function and this line.
|
|
|
463 (eq (calculate-c-indent) t)
|
|
|
464 ;; t if this line contains a comment starter.
|
|
|
465 (setq first-line
|
|
|
466 (save-excursion
|
|
|
467 (beginning-of-line)
|
|
|
468 (prog1
|
|
|
469 (re-search-forward comment-start-skip
|
|
|
470 (save-excursion (end-of-line)
|
|
|
471 (point))
|
|
|
472 t)
|
|
|
473 (setq comment-start-place (point))))))
|
|
|
474 ;; Inside a comment: fill one comment paragraph.
|
|
|
475 (let ((fill-prefix
|
|
|
476 ;; The prefix for each line of this paragraph
|
|
|
477 ;; is the appropriate part of the start of this line,
|
|
|
478 ;; up to the column at which text should be indented.
|
|
|
479 (save-excursion
|
|
|
480 (beginning-of-line)
|
|
|
481 (if (looking-at "[ \t]*/\\*.*\\*/")
|
|
|
482 (progn (re-search-forward comment-start-skip)
|
|
|
483 (make-string (current-column) ?\ ))
|
|
|
484 (if first-line (forward-line 1))
|
|
|
485
|
|
|
486 (let ((line-width (progn (end-of-line) (current-column))))
|
|
|
487 (beginning-of-line)
|
|
|
488 (prog1
|
|
|
489 (buffer-substring
|
|
|
490 (point)
|
|
|
491
|
|
|
492 ;; How shall we decide where the end of the
|
|
|
493 ;; fill-prefix is?
|
|
|
494 ;; calculate-c-indent-within-comment bases its value
|
|
|
495 ;; on the indentation of previous lines; if they're
|
|
|
496 ;; indented specially, it could return a column
|
|
|
497 ;; that's well into the current line's text. So
|
|
|
498 ;; we'll take at most that many space, tab, or *
|
|
|
499 ;; characters, and use that as our fill prefix.
|
|
|
500 (let ((max-prefix-end
|
|
|
501 (progn
|
|
|
502 (move-to-column
|
|
|
503 (calculate-c-indent-within-comment t)
|
|
|
504 t)
|
|
|
505 (point))))
|
|
|
506 (beginning-of-line)
|
|
|
507 (skip-chars-forward " \t*" max-prefix-end)
|
|
|
508 ;; Don't include part of comment terminator
|
|
|
509 ;; in the fill-prefix.
|
|
|
510 (and (eq (following-char) ?/)
|
|
|
511 (eq (preceding-char) ?*)
|
|
|
512 (backward-char 1))
|
|
|
513 (point)))
|
|
|
514
|
|
|
515 ;; If the comment is only one line followed by a blank
|
|
|
516 ;; line, calling move-to-column above may have added
|
|
|
517 ;; some spaces and tabs to the end of the line; the
|
|
|
518 ;; fill-paragraph function will then delete it and the
|
|
|
519 ;; newline following it, so we'll lose a blank line
|
|
|
520 ;; when we shouldn't. So delete anything
|
|
|
521 ;; move-to-column added to the end of the line. We
|
|
|
522 ;; record the line width instead of the position of the
|
|
|
523 ;; old line end because move-to-column might break a
|
|
|
524 ;; tab into spaces, and the new characters introduced
|
|
|
525 ;; there shouldn't be deleted.
|
|
|
526
|
|
|
527 ;; If you can see a better way to do this, please make
|
|
|
528 ;; the change. This seems very messy to me.
|
|
|
529 (delete-region (progn (move-to-column line-width)
|
|
|
530 (point))
|
|
|
531 (progn (end-of-line) (point))))))))
|
|
|
532 (paragraph-start
|
|
|
533 ;; Lines containing just a comment start or just an end
|
|
|
534 ;; should not be filled into paragraphs they are next to.
|
|
|
535 (concat paragraph-start
|
|
|
536 ;; This:
|
|
|
537 ;; "\\|[ \t]*/\\*[ \t]*$"
|
|
|
538 ;; "\\|[ \t]*\\*/[ \t]*$"
|
|
|
539 ;; "\\|[ \t/*]*$"
|
|
|
540 ;; is just this:
|
|
|
541 "\\|[ \t/*]*$"))
|
|
|
542 (paragraph-separate
|
|
|
543 (concat paragraph-separate
|
|
|
544 ;; This:
|
|
|
545 ;; "\\|[ \t]*/\\*[ \t]*$"
|
|
|
546 ;; "\\|[ \t]*\\*/[ \t]*$"
|
|
|
547 ;; "\\|[ \t/*]*$"
|
|
|
548 ;; is just this:
|
|
|
549 "\\|[ \t/*]*$"))
|
|
|
550 (chars-to-delete 0))
|
|
|
551 (save-restriction
|
|
|
552 ;; Don't fill the comment together with the code following it.
|
|
|
553 ;; So temporarily exclude everything before the comment start,
|
|
|
554 ;; and everything after the line where the comment ends.
|
|
|
555 ;; If comment-start-place is non-nil, the comment starter is there.
|
|
|
556 ;; Otherwise, point is inside the comment.
|
|
|
557 (narrow-to-region (save-excursion
|
|
|
558 (if comment-start-place
|
|
|
559 (goto-char comment-start-place)
|
|
|
560 (search-backward "/*"))
|
|
|
561 ;; Protect text before the comment start
|
|
|
562 ;; by excluding it. Add spaces to bring back
|
|
|
563 ;; proper indentation of that point.
|
|
|
564 (let ((column (current-column)))
|
|
|
565 (prog1 (point)
|
|
|
566 (setq chars-to-delete column)
|
|
|
567 (insert-char ?\ column))))
|
|
|
568 (save-excursion
|
|
|
569 (if comment-start-place
|
|
|
570 (goto-char (+ comment-start-place 2)))
|
|
|
571 (search-forward "*/" nil 'move)
|
|
|
572 (forward-line 1)
|
|
|
573 (point)))
|
|
|
574 (save-excursion
|
|
|
575 (goto-char (point-max))
|
|
|
576 (forward-line -1)
|
|
|
577 ;; And comment terminator was on a separate line before,
|
|
|
578 ;; keep it that way.
|
|
|
579 ;; This also avoids another problem:
|
|
|
580 ;; if the fill-prefix ends in a *, it could eat up
|
|
|
581 ;; the * of the comment terminator.
|
|
|
582 (if (looking-at "[ \t]*\\*/")
|
|
|
583 (narrow-to-region (point-min) (point))))
|
|
|
584 (fill-paragraph arg)
|
|
|
585 (save-excursion
|
|
|
586 ;; Delete the chars we inserted to avoid clobbering
|
|
|
587 ;; the stuff before the comment start.
|
|
|
588 (goto-char (point-min))
|
|
|
589 (if (> chars-to-delete 0)
|
|
|
590 (delete-region (point) (+ (point) chars-to-delete)))
|
|
|
591 ;; Find the comment ender (should be on last line of buffer,
|
|
|
592 ;; given the narrowing) and don't leave it on its own line.
|
|
|
593 ;; Do this with a fill command, so as to preserve sentence
|
|
|
594 ;; boundaries.
|
|
|
595 (goto-char (point-max))
|
|
|
596 (forward-line -1)
|
|
|
597 (search-forward "*/" nil 'move)
|
|
|
598 (beginning-of-line)
|
|
|
599 (if (looking-at "[ \t]*\\*/")
|
|
|
600 (let ((fill-column (+ fill-column 9999)))
|
|
|
601 (forward-line -1)
|
|
|
602 (fill-region-as-paragraph (point) (point-max)))))))
|
|
|
603 ;; Outside of comments: do ordinary filling.
|
|
|
604 (fill-paragraph arg)))
|
|
|
605 t))
|
|
|
606
|
|
|
607 (defun electric-c-brace (arg)
|
|
|
608 "Insert character and correct line's indentation."
|
|
|
609 (interactive "P")
|
|
|
610 (let ((insertpos nil))
|
|
|
611 (if (and (not arg)
|
|
|
612 (eolp)
|
|
|
613 (or (save-excursion
|
|
|
614 (skip-chars-backward " \t")
|
|
|
615 (bolp))
|
|
|
616 (if c-auto-newline (progn (c-indent-line) (newline) t) nil)))
|
|
|
617 (progn
|
|
|
618 (insert last-command-char)
|
|
|
619 (c-indent-line)
|
|
|
620 (if c-auto-newline
|
|
|
621 (progn
|
|
|
622 (newline)
|
|
|
623 ;; (newline) may have done auto-fill
|
|
|
624 (setq insertpos (- (point) 2))
|
|
|
625 (c-indent-line)))
|
|
|
626 (save-excursion
|
|
|
627 (if insertpos (goto-char (1+ insertpos)))
|
|
|
628 (delete-char -1))))
|
|
|
629 (if insertpos
|
|
|
630 (save-excursion
|
|
|
631 (goto-char insertpos)
|
|
|
632 (self-insert-command (prefix-numeric-value arg)))
|
|
|
633 (self-insert-command (prefix-numeric-value arg)))))
|
|
|
634
|
|
|
635 (defun c-insert-brackets ()
|
|
|
636 (interactive)
|
|
|
637 (insert ?[)
|
|
|
638 (save-excursion
|
|
|
639 (insert ?])))
|
|
|
640
|
|
|
641 (defun c-insert-braces ()
|
|
|
642 (interactive)
|
|
|
643 (setq last-command-char ?{)
|
|
|
644 (electric-c-brace 1)
|
|
|
645 (newline)
|
|
|
646 (c-indent-line)
|
|
|
647 (save-excursion
|
|
|
648 (newline)
|
|
|
649 (insert ?})
|
|
|
650 (c-indent-line)))
|
|
|
651
|
|
|
652 (defun electric-c-sharp-sign (arg)
|
|
|
653 "Insert character and correct line's indentation."
|
|
|
654 (interactive "P")
|
|
|
655 (if (save-excursion
|
|
|
656 (skip-chars-backward " \t")
|
|
|
657 (bolp))
|
|
|
658 (let ((c-auto-newline nil))
|
|
|
659 (electric-c-terminator arg))
|
|
|
660 (self-insert-command (prefix-numeric-value arg))))
|
|
|
661
|
|
|
662 (defun electric-c-semi (arg)
|
|
|
663 "Insert character and correct line's indentation."
|
|
|
664 (interactive "P")
|
|
|
665 (if c-auto-newline
|
|
|
666 (electric-c-terminator arg)
|
|
|
667 (self-insert-command (prefix-numeric-value arg))))
|
|
|
668
|
|
|
669 (defun electric-c-terminator (arg)
|
|
|
670 "Insert character and correct line's indentation."
|
|
|
671 (interactive "P")
|
|
|
672 (let (insertpos (end (point)))
|
|
|
673 (if (and (not arg) (eolp)
|
|
|
674 (not (save-excursion
|
|
|
675 (beginning-of-line)
|
|
|
676 (skip-chars-forward " \t")
|
|
|
677 (or (= (following-char) ?#)
|
|
|
678 ;; Colon is special only after a label, or case ....
|
|
|
679 ;; So quickly rule out most other uses of colon
|
|
|
680 ;; and do no indentation for them.
|
|
|
681 (and (eq last-command-char ?:)
|
|
|
682 (not (looking-at c-switch-label-regexp))
|
|
|
683 (save-excursion
|
|
|
684 (skip-chars-forward "a-zA-Z0-9_$")
|
|
|
685 (skip-chars-forward " \t")
|
|
|
686 (< (point) end)))
|
|
|
687 (progn
|
|
|
688 (beginning-of-defun)
|
|
|
689 (let ((pps (parse-partial-sexp (point) end)))
|
|
|
690 (or (nth 3 pps) (nth 4 pps) (nth 5 pps))))))))
|
|
|
691 (progn
|
|
|
692 (insert last-command-char)
|
|
|
693 (c-indent-line)
|
|
|
694 (and c-auto-newline
|
|
|
695 (not (c-inside-parens-p))
|
|
|
696 (progn
|
|
|
697 (newline)
|
|
|
698 ;; (newline) may have done auto-fill
|
|
|
699 (setq insertpos (- (point) 2))
|
|
|
700 (c-indent-line)))
|
|
|
701 (save-excursion
|
|
|
702 (if insertpos (goto-char (1+ insertpos)))
|
|
|
703 (delete-char -1))))
|
|
|
704 (if insertpos
|
|
|
705 (save-excursion
|
|
|
706 (goto-char insertpos)
|
|
|
707 (self-insert-command (prefix-numeric-value arg)))
|
|
|
708 (self-insert-command (prefix-numeric-value arg)))))
|
|
|
709
|
|
|
710 (defun c-inside-parens-p ()
|
|
|
711 (condition-case ()
|
|
|
712 (save-excursion
|
|
|
713 (save-restriction
|
|
|
714 (narrow-to-region (point)
|
|
|
715 (progn (beginning-of-defun) (point)))
|
|
|
716 (goto-char (point-max))
|
|
|
717 (= (char-after (or (scan-lists (point) -1 1) (point-min))) ?\()))
|
|
|
718 (error nil)))
|
|
|
719
|
|
|
720 (defun c-indent-command (&optional whole-exp)
|
|
|
721 "Indent current line as C code, or in some cases insert a tab character.
|
|
|
722 If `c-tab-always-indent' is non-nil (the default), always indent current line.
|
|
|
723 Otherwise, indent the current line only if point is at the left margin
|
|
|
724 or in the line's indentation; otherwise insert a tab.
|
|
|
725
|
|
|
726 A numeric argument, regardless of its value, means indent rigidly all
|
|
|
727 the lines of the expression starting after point so that this line
|
|
|
728 becomes properly indented. The relative indentation among the lines
|
|
|
729 of the expression are preserved."
|
|
|
730 (interactive "P")
|
|
|
731 (if whole-exp
|
|
|
732 ;; If arg, always indent this line as C
|
|
|
733 ;; and shift remaining lines of expression the same amount.
|
|
|
734 (let ((shift-amt (c-indent-line))
|
|
|
735 beg end)
|
|
|
736 (save-excursion
|
|
|
737 (if c-tab-always-indent
|
|
|
738 (beginning-of-line))
|
|
|
739 ;; Find beginning of following line.
|
|
|
740 (save-excursion
|
|
|
741 (forward-line 1) (setq beg (point)))
|
|
|
742 ;; Find first beginning-of-sexp for sexp extending past this line.
|
|
|
743 (while (< (point) beg)
|
|
|
744 (forward-sexp 1)
|
|
|
745 (setq end (point))
|
|
|
746 (skip-chars-forward " \t\n")))
|
|
|
747 (if (> end beg)
|
|
|
748 (indent-code-rigidly beg end shift-amt "#")))
|
|
|
749 (if (and (not c-tab-always-indent)
|
|
|
750 (save-excursion
|
|
|
751 (skip-chars-backward " \t")
|
|
|
752 (not (bolp))))
|
|
|
753 (insert-tab)
|
|
|
754 (c-indent-line))))
|
|
|
755
|
|
|
756 (defun c-indent-line ()
|
|
|
757 "Indent current line as C code.
|
|
|
758 Return the amount the indentation changed by."
|
|
|
759 (let ((indent (calculate-c-indent nil))
|
|
|
760 beg shift-amt
|
|
|
761 (case-fold-search nil)
|
|
|
762 (pos (- (point-max) (point))))
|
|
|
763 (beginning-of-line)
|
|
|
764 (setq beg (point))
|
|
|
765 (cond ((eq indent nil)
|
|
|
766 (setq indent (current-indentation)))
|
|
|
767 ((eq indent t)
|
|
|
768 (setq indent (calculate-c-indent-within-comment)))
|
|
|
769 ((looking-at "[ \t]*#")
|
|
|
770 (setq indent 0))
|
|
|
771 (t
|
|
|
772 (skip-chars-forward " \t")
|
|
|
773 (if (listp indent) (setq indent (car indent)))
|
|
|
774 (cond ((or (looking-at c-switch-label-regexp)
|
|
|
775 (and (looking-at "[A-Za-z]")
|
|
|
776 (save-excursion
|
|
|
777 (forward-sexp 1)
|
|
|
778 (looking-at ":"))))
|
|
|
779 (setq indent (max 1 (+ indent c-label-offset))))
|
|
|
780 ((and (looking-at "else\\b")
|
|
|
781 (not (looking-at "else\\s_")))
|
|
|
782 (setq indent (save-excursion
|
|
|
783 (c-backward-to-start-of-if)
|
|
|
784 (current-indentation))))
|
|
|
785 ((and (looking-at "}[ \t]*else\\b")
|
|
|
786 (not (looking-at "}[ \t]*else\\s_")))
|
|
|
787 (setq indent (save-excursion
|
|
|
788 (forward-char)
|
|
|
789 (backward-sexp)
|
|
|
790 (c-backward-to-start-of-if)
|
|
|
791 (current-indentation))))
|
|
|
792 ((and (looking-at "while\\b")
|
|
|
793 (not (looking-at "while\\s_"))
|
|
|
794 (save-excursion
|
|
|
795 (c-backward-to-start-of-do)))
|
|
|
796 ;; This is a `while' that ends a do-while.
|
|
|
797 (setq indent (save-excursion
|
|
|
798 (c-backward-to-start-of-do)
|
|
|
799 (current-indentation))))
|
|
|
800 ((= (following-char) ?})
|
|
|
801 (setq indent (- indent c-indent-level)))
|
|
|
802 ((= (following-char) ?{)
|
|
|
803 (setq indent (+ indent c-brace-offset))))))
|
|
|
804 (skip-chars-forward " \t")
|
|
|
805 (setq shift-amt (- indent (current-column)))
|
|
|
806 (if (zerop shift-amt)
|
|
|
807 (if (> (- (point-max) pos) (point))
|
|
|
808 (goto-char (- (point-max) pos)))
|
|
|
809 (delete-region beg (point))
|
|
|
810 (indent-to indent)
|
|
|
811 ;; If initial point was within line's indentation,
|
|
|
812 ;; position after the indentation. Else stay at same point in text.
|
|
|
813 (if (> (- (point-max) pos) (point))
|
|
|
814 (goto-char (- (point-max) pos))))
|
|
|
815 shift-amt))
|
|
|
816
|
|
|
817 (defun calculate-c-indent (&optional parse-start)
|
|
|
818 "Return appropriate indentation for current line as C code.
|
|
|
819 In usual case returns an integer: the column to indent to.
|
|
|
820 Returns nil if line starts inside a string, t if in a comment."
|
|
|
821 (save-excursion
|
|
|
822 (beginning-of-line)
|
|
|
823 (let ((indent-point (point))
|
|
|
824 (case-fold-search nil)
|
|
|
825 state
|
|
|
826 containing-sexp)
|
|
|
827 (if parse-start
|
|
|
828 (goto-char parse-start)
|
|
|
829 (beginning-of-defun))
|
|
|
830 (while (< (point) indent-point)
|
|
|
831 (setq parse-start (point))
|
|
|
832 (setq state (parse-partial-sexp (point) indent-point 0))
|
|
|
833 (setq containing-sexp (car (cdr state))))
|
|
|
834 (cond ((or (nth 3 state) (nth 4 state))
|
|
|
835 ;; return nil or t if should not change this line
|
|
|
836 (nth 4 state))
|
|
|
837 ((null containing-sexp)
|
|
|
838 ;; Line is at top level. May be data or function definition,
|
|
|
839 ;; or may be function argument declaration.
|
|
|
840 ;; Indent like the previous top level line
|
|
|
841 ;; unless that ends in a closeparen without semicolon,
|
|
|
842 ;; in which case this line is the first argument decl.
|
|
|
843 (goto-char indent-point)
|
|
|
844 (skip-chars-forward " \t")
|
|
|
845 (if (= (following-char) ?{)
|
|
|
846 0 ; Unless it starts a function body
|
|
|
847 (c-backward-to-noncomment (or parse-start (point-min)))
|
|
|
848 ;; Look at previous line that's at column 0
|
|
|
849 ;; to determine whether we are in top-level decls
|
|
|
850 ;; or function's arg decls. Set basic-indent accordingly.
|
|
|
851 (let ((basic-indent
|
|
|
852 (save-excursion
|
|
|
853 (re-search-backward "^[^ \^L\t\n#]" nil 'move)
|
|
|
854 (let (comment lim)
|
|
|
855 ;; Recognize the DEFUN macro in Emacs.
|
|
|
856 (if (save-excursion
|
|
|
857 ;; Move down to the (putative) argnames line.
|
|
|
858 (while (and (not (eobp))
|
|
|
859 (not (looking-at " *[({}#/]")))
|
|
|
860 (forward-line 1))
|
|
|
861 ;; Go back to the DEFUN, if it is one.
|
|
|
862 (condition-case nil
|
|
|
863 (backward-sexp 1)
|
|
|
864 (error))
|
|
|
865 (beginning-of-line)
|
|
|
866 (looking-at "DEFUN\\b"))
|
|
|
867 c-argdecl-indent
|
|
|
868 (if (and (looking-at "\\sw\\|\\s_")
|
|
|
869 ;; This is careful to stop at the first
|
|
|
870 ;; paren if we have
|
|
|
871 ;; int foo Proto ((int, int));
|
|
|
872 (looking-at "[^\"\n=(]*(")
|
|
|
873 (progn
|
|
|
874 (goto-char (1- (match-end 0)))
|
|
|
875 ;; Skip any number of paren-groups.
|
|
|
876 ;; Consider typedef int (*fcn) (int);
|
|
|
877 (while (= (following-char) ?\()
|
|
|
878 (setq lim (point))
|
|
|
879 (condition-case nil
|
|
|
880 (forward-sexp 1)
|
|
|
881 (error))
|
|
|
882 (skip-chars-forward " \t\f"))
|
|
|
883 ;; Have we reached something
|
|
|
884 ;; that shows this isn't a function
|
|
|
885 ;; definition?
|
|
|
886 (and (< (point) indent-point)
|
|
|
887 (not (memq (following-char)
|
|
|
888 '(?\, ?\;)))))
|
|
|
889 ;; Make sure the "function decl" we found
|
|
|
890 ;; is not inside a comment.
|
|
|
891 (progn
|
|
|
892 ;; Move back to the `(' starting arglist
|
|
|
893 (goto-char lim)
|
|
|
894 (beginning-of-line)
|
|
|
895 (while (and (not comment)
|
|
|
896 (search-forward "/*" lim t))
|
|
|
897 (setq comment
|
|
|
898 (not (search-forward "*/" lim t))))
|
|
|
899 (not comment)))
|
|
|
900 c-argdecl-indent 0))))))
|
|
|
901 basic-indent)))
|
|
|
902
|
|
|
903 ;; ;; Now add a little if this is a continuation line.
|
|
|
904 ;; (+ basic-indent (if (or (bobp)
|
|
|
905 ;; (memq (preceding-char) '(?\) ?\; ?\}))
|
|
|
906 ;; ;; Line with zero indentation
|
|
|
907 ;; ;; is probably the return-type
|
|
|
908 ;; ;; of a function definition,
|
|
|
909 ;; ;; so following line is function name.
|
|
|
910 ;; (= (current-indentation) 0))
|
|
|
911 ;; 0 c-continued-statement-offset))
|
|
|
912
|
|
|
913 ((/= (char-after containing-sexp) ?{)
|
|
|
914 ;; line is expression, not statement:
|
|
|
915 ;; indent to just after the surrounding open.
|
|
|
916 (goto-char (1+ containing-sexp))
|
|
|
917 (current-column))
|
|
|
918 (t
|
|
|
919 ;; Statement level. Is it a continuation or a new statement?
|
|
|
920 ;; Find previous non-comment character.
|
|
|
921 (goto-char indent-point)
|
|
|
922 (c-backward-to-noncomment containing-sexp)
|
|
|
923 ;; Back up over label lines, since they don't
|
|
|
924 ;; affect whether our line is a continuation.
|
|
|
925 (while (or (eq (preceding-char) ?\,)
|
|
|
926 (and (eq (preceding-char) ?:)
|
|
|
927 (or (eq (char-after (- (point) 2)) ?\')
|
|
|
928 (memq (char-syntax (char-after (- (point) 2)))
|
|
|
929 '(?w ?_)))))
|
|
|
930 (if (eq (preceding-char) ?\,)
|
|
|
931 (progn (forward-char -1)
|
|
|
932 (c-backward-to-start-of-continued-exp containing-sexp)))
|
|
|
933 (beginning-of-line)
|
|
|
934 (c-backward-to-noncomment containing-sexp))
|
|
|
935 ;; Check for a preprocessor statement or its continuation lines.
|
|
|
936 ;; Move back to end of previous non-preprocessor line,
|
|
|
937 ;; or possibly beginning of buffer.
|
|
|
938 (let ((found (point)) stop)
|
|
|
939 (while (not stop)
|
|
|
940 (beginning-of-line)
|
|
|
941 (cond ((bobp)
|
|
|
942 (setq found (point)
|
|
|
943 stop t))
|
|
|
944 ((save-excursion (forward-char -1)
|
|
|
945 (= (preceding-char) ?\\))
|
|
|
946 (forward-char -1))
|
|
|
947 ;; This line is not preceded by a backslash.
|
|
|
948 ;; So either it starts a preprocessor command
|
|
|
949 ;; or any following continuation lines
|
|
|
950 ;; should not be skipped.
|
|
|
951 ((= (following-char) ?#)
|
|
|
952 (forward-char -1)
|
|
|
953 (setq found (point)))
|
|
|
954 (t (setq stop t))))
|
|
|
955 (goto-char found))
|
|
|
956 ;; Now we get the answer.
|
|
|
957 (if (and (not (memq (preceding-char) '(0 ?\, ?\; ?\} ?\{)))
|
|
|
958 ;; But don't treat a line with a close-brace
|
|
|
959 ;; as a continuation. It is probably the
|
|
|
960 ;; end of an enum type declaration.
|
|
|
961 (save-excursion
|
|
|
962 (goto-char indent-point)
|
|
|
963 (skip-chars-forward " \t")
|
|
|
964 (not (= (following-char) ?}))))
|
|
|
965 ;; This line is continuation of preceding line's statement;
|
|
|
966 ;; indent c-continued-statement-offset more than the
|
|
|
967 ;; previous line of the statement.
|
|
|
968 (progn
|
|
|
969 (c-backward-to-start-of-continued-exp containing-sexp)
|
|
|
970 (+ c-continued-statement-offset (current-column)
|
|
|
971 (if (save-excursion (goto-char indent-point)
|
|
|
972 (skip-chars-forward " \t")
|
|
|
973 (eq (following-char) ?{))
|
|
|
974 c-continued-brace-offset 0)))
|
|
|
975 ;; This line starts a new statement.
|
|
|
976 ;; Position following last unclosed open.
|
|
|
977 (goto-char containing-sexp)
|
|
|
978 ;; Is line first statement after an open-brace?
|
|
|
979 (or
|
|
|
980 ;; If no, find that first statement and indent like it.
|
|
|
981 (save-excursion
|
|
|
982 (forward-char 1)
|
|
|
983 (let ((colon-line-end 0))
|
|
|
984 (while (progn (skip-chars-forward " \t\n")
|
|
|
985 (looking-at "#\\|/\\*\\|case[ \t\n'/(].*:\\|[a-zA-Z0-9_$]*:"))
|
|
|
986 ;; Skip over comments and labels following openbrace.
|
|
|
987 (cond ((= (following-char) ?\#)
|
|
|
988 (forward-line 1))
|
|
|
989 ((= (following-char) ?\/)
|
|
|
990 (forward-char 2)
|
|
|
991 (search-forward "*/" nil 'move))
|
|
|
992 ;; case or label:
|
|
|
993 (t
|
|
|
994 (save-excursion (end-of-line)
|
|
|
995 (setq colon-line-end (point)))
|
|
|
996 (search-forward ":"))))
|
|
|
997 ;; The first following code counts
|
|
|
998 ;; if it is before the line we want to indent.
|
|
|
999 (and (< (point) indent-point)
|
|
|
1000 (-
|
|
|
1001 (if (> colon-line-end (point))
|
|
|
1002 (- (current-indentation) c-label-offset)
|
|
|
1003 (current-column))
|
|
|
1004 ;; If prev stmt starts with open-brace, that
|
|
|
1005 ;; open brace was offset by c-brace-offset.
|
|
|
1006 ;; Compensate to get the column where
|
|
|
1007 ;; an ordinary statement would start.
|
|
|
1008 (if (= (following-char) ?\{) c-brace-offset 0)))))
|
|
|
1009 ;; If no previous statement,
|
|
|
1010 ;; indent it relative to line brace is on.
|
|
|
1011 (calculate-c-indent-after-brace))))))))
|
|
|
1012
|
|
|
1013 (defun calculate-c-indent-after-brace ()
|
|
|
1014 "Return the proper C indent for the first line after an open-brace.
|
|
|
1015 This function is called with point before the brace."
|
|
|
1016 ;; For open brace in column zero, don't let statement
|
|
|
1017 ;; start there too. If c-indent-level is zero,
|
|
|
1018 ;; use c-brace-offset + c-continued-statement-offset instead.
|
|
|
1019 ;; For open-braces not the first thing in a line,
|
|
|
1020 ;; add in c-brace-imaginary-offset.
|
|
|
1021 (+ (if (and (bolp) (zerop c-indent-level))
|
|
|
1022 (+ c-brace-offset c-continued-statement-offset)
|
|
|
1023 c-indent-level)
|
|
|
1024 ;; Move back over whitespace before the openbrace.
|
|
|
1025 ;; If openbrace is not first nonwhite thing on the line,
|
|
|
1026 ;; add the c-brace-imaginary-offset.
|
|
|
1027 (progn (skip-chars-backward " \t")
|
|
|
1028 (if (bolp) 0 c-brace-imaginary-offset))
|
|
|
1029 ;; If the openbrace is preceded by a parenthesized exp,
|
|
|
1030 ;; move to the beginning of that;
|
|
|
1031 ;; possibly a different line
|
|
|
1032 (progn
|
|
|
1033 (if (eq (preceding-char) ?\))
|
|
|
1034 (forward-sexp -1))
|
|
|
1035 ;; Get initial indentation of the line we are on.
|
|
|
1036 (current-indentation))))
|
|
|
1037
|
|
|
1038 (defun calculate-c-indent-within-comment (&optional after-star)
|
|
|
1039 "Return the indentation amount for line inside a block comment.
|
|
|
1040 Optional arg AFTER-STAR means, if lines in the comment have a leading star,
|
|
|
1041 return the indentation of the text that would follow this star."
|
|
|
1042 (let (end star-start)
|
|
|
1043 (save-excursion
|
|
|
1044 (beginning-of-line)
|
|
|
1045 (skip-chars-forward " \t")
|
|
|
1046 (setq star-start (= (following-char) ?\*))
|
|
|
1047 (skip-chars-backward " \t\n")
|
|
|
1048 (setq end (point))
|
|
|
1049 (beginning-of-line)
|
|
|
1050 (skip-chars-forward " \t")
|
|
|
1051 (if after-star
|
|
|
1052 (and (looking-at "\\*")
|
|
|
1053 (re-search-forward "\\*[ \t]*")))
|
|
|
1054 (and (re-search-forward "/\\*[ \t]*" end t)
|
|
|
1055 star-start
|
|
|
1056 (not after-star)
|
|
|
1057 (goto-char (1+ (match-beginning 0))))
|
|
|
1058 (if (and (looking-at "[ \t]*$") (= (preceding-char) ?\*))
|
|
|
1059 (1+ (current-column))
|
|
|
1060 (current-column)))))
|
|
|
1061
|
|
|
1062
|
|
|
1063 (defun c-backward-to-noncomment (lim)
|
|
|
1064 (let (opoint stop)
|
|
|
1065 (while (not stop)
|
|
|
1066 (skip-chars-backward " \t\n\f" lim)
|
|
|
1067 (setq opoint (point))
|
|
|
1068 (if (and (>= (point) (+ 2 lim))
|
|
|
1069 (save-excursion
|
|
|
1070 (forward-char -2)
|
|
|
1071 (looking-at "\\*/")))
|
|
|
1072 (search-backward "/*" lim 'move)
|
|
|
1073 (setq stop (or (<= (point) lim)
|
|
|
1074 (save-excursion
|
|
|
1075 (while (progn
|
|
|
1076 (beginning-of-line)
|
|
|
1077 (eq ?\\ (char-after (- (point) 2))))
|
|
|
1078 (forward-char -1)
|
|
|
1079 (beginning-of-line))
|
|
|
1080 (skip-chars-forward " \t")
|
|
|
1081 (not (looking-at "#")))))
|
|
|
1082 (or stop (beginning-of-line))))))
|
|
|
1083
|
|
|
1084 (defun c-backward-to-start-of-continued-exp (lim)
|
|
|
1085 (if (memq (preceding-char) '(?\) ?\"))
|
|
|
1086 (forward-sexp -1))
|
|
|
1087 (beginning-of-line)
|
|
|
1088 (if (<= (point) lim)
|
|
|
1089 (goto-char (1+ lim)))
|
|
|
1090 (skip-chars-forward " \t"))
|
|
|
1091
|
|
|
1092 (defun c-backward-to-start-of-if (&optional limit)
|
|
|
1093 "Move to the start of the last \"unbalanced\" `if'."
|
|
|
1094 (or limit (setq limit (save-excursion (beginning-of-defun) (point))))
|
|
|
1095 (let ((if-level 1)
|
|
|
1096 (case-fold-search nil))
|
|
|
1097 (while (and (not (bobp)) (not (zerop if-level)))
|
|
|
1098 (backward-sexp 1)
|
|
|
1099 (cond ((and (looking-at "else\\b")
|
|
|
1100 (not (looking-at "else\\s_")))
|
|
|
1101 (setq if-level (1+ if-level)))
|
|
|
1102 ((and (looking-at "if\\b")
|
|
|
1103 (not (looking-at "if\\s_")))
|
|
|
1104 (setq if-level (1- if-level)))
|
|
|
1105 ((< (point) limit)
|
|
|
1106 (setq if-level 0)
|
|
|
1107 (goto-char limit))))))
|
|
|
1108
|
|
|
1109 (defun c-backward-to-start-of-do (&optional limit)
|
|
|
1110 "If point follows a `do' statement, move to beginning of it and return t.
|
|
|
1111 Otherwise return nil and don't move point."
|
|
|
1112 (or limit (setq limit (save-excursion (beginning-of-defun) (point))))
|
|
|
1113 (let ((first t)
|
|
|
1114 (startpos (point))
|
|
|
1115 (done nil))
|
|
|
1116 (while (not done)
|
|
|
1117 (let ((next-start (point)))
|
|
|
1118 (condition-case nil
|
|
|
1119 ;; Move back one token or one brace or paren group.
|
|
|
1120 (backward-sexp 1)
|
|
|
1121 ;; If we find an open-brace, we lose.
|
|
|
1122 (error (setq done 'fail)))
|
|
|
1123 (if done
|
|
|
1124 nil
|
|
|
1125 ;; If we reached a `do', we win.
|
|
|
1126 (if (looking-at "do\\b")
|
|
|
1127 (setq done 'succeed)
|
|
|
1128 ;; Otherwise, if we skipped a semicolon, we lose.
|
|
|
1129 ;; (Exception: we can skip one semicolon before getting
|
|
|
1130 ;; to a the last token of the statement, unless that token
|
|
|
1131 ;; is a close brace.)
|
|
|
1132 (if (save-excursion
|
|
|
1133 (forward-sexp 1)
|
|
|
1134 (or (and (not first) (= (preceding-char) ?}))
|
|
|
1135 (search-forward ";" next-start t
|
|
|
1136 (if (and first
|
|
|
1137 (/= (preceding-char) ?}))
|
|
|
1138 2 1))))
|
|
|
1139 (setq done 'fail)
|
|
|
1140 (setq first nil)
|
|
|
1141 ;; If we go too far back in the buffer, we lose.
|
|
|
1142 (if (< (point) limit)
|
|
|
1143 (setq done 'fail)))))))
|
|
|
1144 (if (eq done 'succeed)
|
|
|
1145 t
|
|
|
1146 (goto-char startpos)
|
|
|
1147 nil)))
|
|
|
1148
|
|
|
1149 (defun c-beginning-of-statement (count)
|
|
|
1150 "Go to the beginning of the innermost C statement.
|
|
|
1151 With prefix arg, go back N - 1 statements. If already at the beginning of a
|
|
|
1152 statement then go to the beginning of the preceding one.
|
|
|
1153 If within a string or comment, or next to a comment (only whitespace between),
|
|
|
1154 move by sentences instead of statements."
|
|
|
1155 (interactive "p")
|
|
|
1156 (let ((here (point)) state)
|
|
|
1157 (save-excursion
|
|
|
1158 (beginning-of-defun)
|
|
|
1159 (setq state (parse-partial-sexp (point) here nil nil)))
|
|
|
1160 (if (or (nth 3 state) (nth 4 state)
|
|
|
1161 (looking-at (concat "[ \t]*" comment-start-skip))
|
|
|
1162 (save-excursion (skip-chars-backward " \t")
|
|
|
1163 (goto-char (- (point) 2))
|
|
|
1164 (looking-at "\\*/")))
|
|
|
1165 (forward-sentence (- count))
|
|
|
1166 (while (> count 0)
|
|
|
1167 (c-beginning-of-statement-1)
|
|
|
1168 (setq count (1- count)))
|
|
|
1169 (while (< count 0)
|
|
|
1170 (c-end-of-statement-1)
|
|
|
1171 (setq count (1+ count))))))
|
|
|
1172
|
|
|
1173 (defun c-end-of-statement (count)
|
|
|
1174 "Go to the end of the innermost C statement.
|
|
|
1175 With prefix arg, go forward N - 1 statements.
|
|
|
1176 Move forward to end of the next statement if already at end.
|
|
|
1177 If within a string or comment, move by sentences instead of statements."
|
|
|
1178 (interactive "p")
|
|
|
1179 (c-beginning-of-statement (- count)))
|
|
|
1180
|
|
|
1181 (defun c-beginning-of-statement-1 ()
|
|
|
1182 (let ((last-begin (point))
|
|
|
1183 (first t))
|
|
|
1184 (condition-case ()
|
|
|
1185 (progn
|
|
|
1186 (while (and (not (bobp))
|
|
|
1187 (progn
|
|
|
1188 (backward-sexp 1)
|
|
|
1189 (or first
|
|
|
1190 (not (re-search-forward "[;{}]" last-begin t)))))
|
|
|
1191 (setq last-begin (point) first nil))
|
|
|
1192 (goto-char last-begin))
|
|
|
1193 (error (if first (backward-up-list 1) (goto-char last-begin))))))
|
|
|
1194
|
|
|
1195 (defun c-end-of-statement-1 ()
|
|
|
1196 (condition-case ()
|
|
|
1197 (progn
|
|
|
1198 (while (and (not (eobp))
|
|
|
1199 (let ((beg (point)))
|
|
|
1200 (forward-sexp 1)
|
|
|
1201 (let ((end (point)))
|
|
|
1202 (save-excursion
|
|
|
1203 (goto-char beg)
|
|
|
1204 (not (re-search-forward "[;{}]" end t)))))))
|
|
|
1205 (re-search-backward "[;}]")
|
|
|
1206 (forward-char 1))
|
|
|
1207 (error
|
|
|
1208 (let ((beg (point)))
|
|
|
1209 (backward-up-list -1)
|
|
|
1210 (let ((end (point)))
|
|
|
1211 (goto-char beg)
|
|
|
1212 (search-forward ";" end 'move))))))
|
|
|
1213
|
|
|
1214 (defun mark-c-function ()
|
|
|
1215 "Put mark at end of C function, point at beginning."
|
|
|
1216 (interactive)
|
|
|
1217 (push-mark (point))
|
|
|
1218 (end-of-defun)
|
|
|
1219 (push-mark (point) nil t)
|
|
|
1220 (beginning-of-defun)
|
|
|
1221 (backward-paragraph))
|
|
|
1222
|
|
|
1223 ;; Idea of ENDPOS is, indent each line, stopping when
|
|
|
1224 ;; ENDPOS is encountered. But it's too much of a pain to make that work.
|
|
|
1225 (defun indent-c-exp (&optional endpos)
|
|
|
1226 "Indent each line of the C grouping following point."
|
|
|
1227 (interactive)
|
|
|
1228 (let* ((indent-stack (list nil))
|
|
|
1229 (opoint (point)) ;; May be altered below.
|
|
|
1230 (contain-stack
|
|
|
1231 (list (if endpos
|
|
|
1232 (let (funbeg)
|
|
|
1233 ;; Find previous fcn-start.
|
|
|
1234 (save-excursion (forward-char 1)
|
|
|
1235 (beginning-of-defun)
|
|
|
1236 (setq funbeg (point)))
|
|
|
1237 (setq opoint funbeg)
|
|
|
1238 ;; Try to find containing open,
|
|
|
1239 ;; but don't scan past that fcn-start.
|
|
|
1240 (save-restriction
|
|
|
1241 (narrow-to-region funbeg (point))
|
|
|
1242 (condition-case nil
|
|
|
1243 (save-excursion
|
|
|
1244 (backward-up-list 1) (point))
|
|
|
1245 ;; We gave up: must be between fcns.
|
|
|
1246 ;; Set opoint to beg of prev fcn
|
|
|
1247 ;; since otherwise calculate-c-indent
|
|
|
1248 ;; will get wrong answers.
|
|
|
1249 (error
|
|
|
1250 ;;;#### Commented-out in XEmacs, present in FSFmacs
|
|
|
1251 ; (setq opoint funbeg)
|
|
|
1252 (point)))))
|
|
|
1253 (point))))
|
|
|
1254 (case-fold-search nil)
|
|
|
1255 restart outer-loop-done inner-loop-done state ostate
|
|
|
1256 this-indent last-sexp
|
|
|
1257 at-else at-brace at-while
|
|
|
1258 last-depth this-point
|
|
|
1259 (next-depth 0))
|
|
|
1260 ;; If the braces don't match, get an error right away.
|
|
|
1261 (save-excursion
|
|
|
1262 (forward-sexp 1))
|
|
|
1263 ;; Realign the comment on the first line, even though we don't reindent it.
|
|
|
1264 (save-excursion
|
|
|
1265 (let ((beg (point)))
|
|
|
1266 (and (re-search-forward
|
|
|
1267 comment-start-skip
|
|
|
1268 (save-excursion (end-of-line) (point)) t)
|
|
|
1269 ;; Make sure this isn't a comment alone on a line
|
|
|
1270 ;; (which should be indented like code instead).
|
|
|
1271 (save-excursion
|
|
|
1272 (goto-char (match-beginning 0))
|
|
|
1273 (skip-chars-backward " \t")
|
|
|
1274 (not (bolp)))
|
|
|
1275 ;; Make sure the comment starter we found
|
|
|
1276 ;; is not actually in a string or quoted.
|
|
|
1277 (let ((new-state
|
|
|
1278 (parse-partial-sexp beg (point)
|
|
|
1279 nil nil state)))
|
|
|
1280 (and (not (nth 3 new-state)) (not (nth 5 new-state))))
|
|
|
1281 (progn (indent-for-comment) (beginning-of-line)))))
|
|
|
1282 (save-excursion
|
|
|
1283 (setq outer-loop-done nil)
|
|
|
1284 (while (and (not (eobp))
|
|
|
1285 (if endpos
|
|
|
1286 (< (point) endpos)
|
|
|
1287 (not outer-loop-done)))
|
|
|
1288 (setq last-depth next-depth)
|
|
|
1289 ;; Compute how depth changes over this line
|
|
|
1290 ;; plus enough other lines to get to one that
|
|
|
1291 ;; does not end inside a comment or string.
|
|
|
1292 ;; Meanwhile, do appropriate indentation on comment lines.
|
|
|
1293 (setq inner-loop-done nil)
|
|
|
1294 (while (and (not inner-loop-done)
|
|
|
1295 (not (and (eobp) (setq outer-loop-done t))))
|
|
|
1296 (setq ostate state)
|
|
|
1297 (setq state (parse-partial-sexp (point) (progn (end-of-line) (point))
|
|
|
1298 nil nil state))
|
|
|
1299 (setq next-depth (car state))
|
|
|
1300 (if (and (car (cdr (cdr state)))
|
|
|
1301 (>= (car (cdr (cdr state))) 0))
|
|
|
1302 (setq last-sexp (car (cdr (cdr state)))))
|
|
|
1303 ;; If this line started within a comment, indent it as such.
|
|
|
1304 (if (or (nth 4 ostate) (nth 7 ostate))
|
|
|
1305 (c-indent-line))
|
|
|
1306 ;; If it ends outside of comments or strings, exit the inner loop.
|
|
|
1307 ;; Otherwise move on to next line.
|
|
|
1308 (if (or (nth 3 state) (nth 4 state) (nth 7 state))
|
|
|
1309 (forward-line 1)
|
|
|
1310 (setq inner-loop-done t)))
|
|
|
1311 (and endpos
|
|
|
1312 (while (< next-depth 0)
|
|
|
1313 (setq indent-stack (append indent-stack (list nil)))
|
|
|
1314 (setq contain-stack (append contain-stack (list nil)))
|
|
|
1315 (setq next-depth (1+ next-depth))
|
|
|
1316 (setq last-depth (1+ last-depth))
|
|
|
1317 (setcar (nthcdr 6 state) (1+ (nth 6 state)))))
|
|
|
1318 (setq outer-loop-done (and (not endpos) (<= next-depth 0)))
|
|
|
1319 (if outer-loop-done
|
|
|
1320 nil
|
|
|
1321 ;; If this line had ..))) (((.. in it, pop out of the levels
|
|
|
1322 ;; that ended anywhere in this line, even if the final depth
|
|
|
1323 ;; doesn't indicate that they ended.
|
|
|
1324 (while (> last-depth (nth 6 state))
|
|
|
1325 (setq indent-stack (cdr indent-stack)
|
|
|
1326 contain-stack (cdr contain-stack)
|
|
|
1327 last-depth (1- last-depth)))
|
|
|
1328 (if (/= last-depth next-depth)
|
|
|
1329 (setq last-sexp nil))
|
|
|
1330 ;; Add levels for any parens that were started in this line.
|
|
|
1331 (while (< last-depth next-depth)
|
|
|
1332 (setq indent-stack (cons nil indent-stack)
|
|
|
1333 contain-stack (cons nil contain-stack)
|
|
|
1334 last-depth (1+ last-depth)))
|
|
|
1335 (if (null (car contain-stack))
|
|
|
1336 (setcar contain-stack (or (car (cdr state))
|
|
|
1337 (save-excursion (forward-sexp -1)
|
|
|
1338 (point)))))
|
|
|
1339 (forward-line 1)
|
|
|
1340 (skip-chars-forward " \t")
|
|
|
1341 ;; Don't really reindent if the line is just whitespace,
|
|
|
1342 ;; or if it is past the endpos.
|
|
|
1343 ;; (The exit test in the outer while
|
|
|
1344 ;; does not exit until we have passed the first line
|
|
|
1345 ;; past the region.)
|
|
|
1346 (if (or (eolp) (and endpos (>= (point) endpos)))
|
|
|
1347 nil
|
|
|
1348 ;; Is this line in a new nesting level?
|
|
|
1349 ;; In other words, is this the first line that
|
|
|
1350 ;; starts in the new level?
|
|
|
1351 (if (and (car indent-stack)
|
|
|
1352 (>= (car indent-stack) 0))
|
|
|
1353 nil
|
|
|
1354 ;; Yes.
|
|
|
1355 ;; Compute the standard indent for this level.
|
|
|
1356 (let (val)
|
|
|
1357 (if (= (char-after (car contain-stack)) ?{)
|
|
|
1358 (save-excursion
|
|
|
1359 (goto-char (car contain-stack))
|
|
|
1360 (setq val (calculate-c-indent-after-brace)))
|
|
|
1361 (setq val (calculate-c-indent
|
|
|
1362 (if (car indent-stack)
|
|
|
1363 (- (car indent-stack))
|
|
|
1364 opoint))))
|
|
|
1365 ;; t means we are in a block comment and should
|
|
|
1366 ;; calculate accordingly.
|
|
|
1367 (if (eq val t)
|
|
|
1368 (setq val (calculate-c-indent-within-comment)))
|
|
|
1369 (setcar indent-stack val)))
|
|
|
1370 ;; Adjust indent of this individual line
|
|
|
1371 ;; based on its predecessor.
|
|
|
1372 ;; Handle continuation lines, if, else, while, and so on.
|
|
|
1373 (if (/= (char-after (car contain-stack)) ?{)
|
|
|
1374 (setq this-indent (car indent-stack))
|
|
|
1375 ;; Line is at statement level.
|
|
|
1376 ;; Is it a new statement? Is it an else?
|
|
|
1377 ;; Find last non-comment character before this line
|
|
|
1378 (save-excursion
|
|
|
1379 (setq this-point (point))
|
|
|
1380 (setq at-else (and (looking-at "else\\b")
|
|
|
1381 (not (looking-at "else\\s_"))))
|
|
|
1382 (setq at-brace (= (following-char) ?{))
|
|
|
1383 (setq at-while (and (looking-at "while\\b")
|
|
|
1384 (not (looking-at "while\\s_"))))
|
|
|
1385 (if (= (following-char) ?})
|
|
|
1386 (setq this-indent (car indent-stack))
|
|
|
1387 (c-backward-to-noncomment opoint)
|
|
|
1388 (if (not (memq (preceding-char) '(0 ?\, ?\; ?} ?: ?{)))
|
|
|
1389 ;; Preceding line did not end in comma or semi;
|
|
|
1390 ;; indent this line c-continued-statement-offset
|
|
|
1391 ;; more than previous.
|
|
|
1392 (progn
|
|
|
1393 (c-backward-to-start-of-continued-exp (car contain-stack))
|
|
|
1394 (setq this-indent
|
|
|
1395 (+ c-continued-statement-offset (current-column)
|
|
|
1396 (if at-brace c-continued-brace-offset 0))))
|
|
|
1397 ;; Preceding line ended in comma or semi;
|
|
|
1398 ;; use the standard indent for this level.
|
|
|
1399 (cond (at-else (progn (c-backward-to-start-of-if opoint)
|
|
|
1400 (setq this-indent
|
|
|
1401 (current-indentation))))
|
|
|
1402 ((and at-while (c-backward-to-start-of-do opoint))
|
|
|
1403 (setq this-indent (current-indentation)))
|
|
|
1404 ((eq (preceding-char) ?\,)
|
|
|
1405 (goto-char this-point)
|
|
|
1406 (setq this-indent (calculate-c-indent)))
|
|
|
1407 (t (setq this-indent (car indent-stack))))))))
|
|
|
1408 ;; Adjust line indentation according to its contents
|
|
|
1409 (if (or (looking-at c-switch-label-regexp)
|
|
|
1410 (and (looking-at "[A-Za-z]")
|
|
|
1411 (save-excursion
|
|
|
1412 (forward-sexp 1)
|
|
|
1413 (looking-at ":"))))
|
|
|
1414 (setq this-indent (max 1 (+ this-indent c-label-offset))))
|
|
|
1415 (if (= (following-char) ?})
|
|
|
1416 (setq this-indent (- this-indent c-indent-level)))
|
|
|
1417 (if (= (following-char) ?{)
|
|
|
1418 ;; Don't move an open-brace in column 0.
|
|
|
1419 ;; This is good when constructs such as
|
|
|
1420 ;; `extern "C" {' surround a function definition
|
|
|
1421 ;; that should be indented as usual.
|
|
|
1422 ;; It is also good for nested functions.
|
|
|
1423 ;; It is bad when an open-brace is indented at column 0
|
|
|
1424 ;; and you want to fix that, but we can't win 'em all.
|
|
|
1425 (if (zerop (current-column))
|
|
|
1426 (setq this-indent 0)
|
|
|
1427 (setq this-indent (+ this-indent c-brace-offset))))
|
|
|
1428 ;; Don't leave indentation in empty lines.
|
|
|
1429 (if (eolp) (setq this-indent 0))
|
|
|
1430 ;; Put chosen indentation into effect.
|
|
|
1431 (or (= (current-column) this-indent)
|
|
|
1432 (= (following-char) ?\#)
|
|
|
1433 (progn
|
|
|
1434 (delete-region (point) (progn (beginning-of-line) (point)))
|
|
|
1435 (indent-to this-indent)))
|
|
|
1436 ;; Indent any comment following the text.
|
|
|
1437 (or (looking-at comment-start-skip)
|
|
|
1438 (save-excursion
|
|
|
1439 (let ((beg (point)))
|
|
|
1440 (and (re-search-forward
|
|
|
1441 comment-start-skip
|
|
|
1442 (save-excursion (end-of-line) (point)) t)
|
|
|
1443 ;; Make sure the comment starter we found
|
|
|
1444 ;; is not actually in a string or quoted.
|
|
|
1445 (let ((new-state
|
|
|
1446 (parse-partial-sexp beg (point)
|
|
|
1447 nil nil state)))
|
|
|
1448 (and (not (nth 3 new-state))
|
|
|
1449 (not (nth 5 new-state))))
|
|
|
1450 (indent-for-comment)))))))))))
|
|
|
1451
|
|
|
1452 ;; Look at all comment-start strings in the current line after point.
|
|
|
1453 ;; Return t if one of them starts a real comment.
|
|
|
1454 ;; This is not used yet, because indent-for-comment
|
|
|
1455 ;; isn't smart enough to handle the cases this can find.
|
|
|
1456 (defun indent-c-find-real-comment ()
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1457 (let (win)
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1458 (while (and (not win)
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1459 (re-search-forward comment-start-skip
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1460 (save-excursion (end-of-line) (point))
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1461 t))
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1462 ;; Make sure the comment start is not quoted.
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1463 (let ((state-1
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1464 (parse-partial-sexp
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1465 (save-excursion (beginning-of-line) (point))
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1466 (point) nil nil state)))
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1467 (setq win (and (null (nth 3 state-1)) (null (nth 5 state-1))))))
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1468 win))
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1469
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1470 ;; Indent every line whose first char is between START and END inclusive.
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1471 (defun c-indent-region (start end)
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1472 (save-excursion
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1473 (goto-char start)
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1474 ;; Advance to first nonblank line.
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1475 (skip-chars-forward " \t\n")
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1476 (beginning-of-line)
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1477 (let ((endmark (copy-marker end))
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1478 (c-tab-always-indent t))
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1479 (while (and (bolp) (not (eobp)) (< (point) endmark))
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1480 ;; Indent one line as with TAB.
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1481 (let ((shift-amt (c-indent-line))
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1482 nextline sexpbeg sexpend)
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1483 (if (save-excursion (beginning-of-line) (looking-at "[ \t]*#"))
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1484 (forward-line 1)
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1485 (save-excursion
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1486 ;; Find beginning of following line.
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1487 (save-excursion
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1488 (forward-line 1) (setq nextline (point)))
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1489 ;; Find first beginning-of-sexp for sexp extending past this line.
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1490 (beginning-of-line)
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1491 (while (< (point) nextline)
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1492 (condition-case nil
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1493 (progn
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1494 (forward-sexp 1)
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1495 (setq sexpend (point-marker)))
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1496 (error (setq sexpend nil)
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1497 (goto-char nextline)))
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1498 (skip-chars-forward " \t\n"))
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|
1499 (if sexpend
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1500 (progn
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1501 ;; Make sure the sexp we found really starts on the
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|
1502 ;; current line and extends past it.
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1503 (goto-char sexpend)
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1504 (backward-sexp 1)
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|
1505 (setq sexpbeg (point)))))
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1506 ;; If that sexp ends within the region,
|
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1507 ;; indent it all at once, fast.
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1508 (if (and sexpend (> sexpend nextline) (<= sexpend endmark)
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1509 (< sexpbeg nextline))
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1510 (progn
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1511 (indent-c-exp)
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1512 (goto-char sexpend)))
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1513 ;; Move to following line and try again.
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1514 (and sexpend (set-marker sexpend nil))
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1515 (forward-line 1))))
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1516 (set-marker endmark nil))))
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1517
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|
1518 (defun set-c-style (style &optional global)
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|
1519 "Set C-mode variables to use one of several different indentation styles.
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|
1520 The arguments are a string representing the desired style
|
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1521 and a flag which, if non-nil, means to set the style globally.
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1522 \(Interactively, the flag comes from the prefix argument.)
|
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1523 Available styles are GNU, K&R, BSD and Whitesmith."
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|
1524 (interactive (list (let ((completion-ignore-case t))
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|
1525 (completing-read "Use which C indentation style? "
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|
|
1526 c-style-alist nil t))
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|
|
1527 current-prefix-arg))
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|
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1528 (let ((vars (cdr (assoc style c-style-alist))))
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|
|
1529 (or vars
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|
|
1530 (error "Invalid C indentation style `%s'" style))
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|
|
1531 (while vars
|
|
|
1532 (or global
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|
|
1533 (make-local-variable (car (car vars))))
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|
1534 (set (car (car vars)) (cdr (car vars)))
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|
1535 (setq vars (cdr vars)))))
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1536
|
|
|
1537 ;;; This page handles insertion and removal of backslashes for C macros.
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|
1538
|
|
|
1539 (defvar c-backslash-column 48
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|
|
1540 "*Minimum column for end-of-line backslashes of macro definitions.")
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1541
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1542 (defun c-backslash-region (from to delete-flag)
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|
1543 "Insert, align, or delete end-of-line backslashes on the lines in the region.
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1544 With no argument, inserts backslashes and aligns existing backslashes.
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1545 With an argument, deletes the backslashes.
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1546
|
|
|
1547 This function does not modify the last line of the region if the region ends
|
|
|
1548 right at the start of the following line; it does not modify blank lines
|
|
|
1549 at the start of the region. So you can put the region around an entire macro
|
|
|
1550 definition and conveniently use this command."
|
|
|
1551 (interactive "r\nP")
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|
|
1552 (save-excursion
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|
|
1553 (goto-char from)
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|
|
1554 (let ((column c-backslash-column)
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|
|
1555 (endmark (make-marker)))
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|
|
1556 (move-marker endmark to)
|
|
|
1557 ;; Compute the smallest column number past the ends of all the lines.
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|
|
1558 (if (not delete-flag)
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|
|
1559 (while (< (point) to)
|
|
|
1560 (end-of-line)
|
|
|
1561 (if (= (preceding-char) ?\\)
|
|
|
1562 (progn (forward-char -1)
|
|
|
1563 (skip-chars-backward " \t")))
|
|
|
1564 (setq column (max column (1+ (current-column))))
|
|
|
1565 (forward-line 1)))
|
|
|
1566 ;; Adjust upward to a tab column, if that doesn't push past the margin.
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|
|
1567 (if (> (% column tab-width) 0)
|
|
|
1568 (let ((adjusted (* (/ (+ column tab-width -1) tab-width) tab-width)))
|
|
|
1569 (if (< adjusted (window-width))
|
|
|
1570 (setq column adjusted))))
|
|
|
1571 ;; Don't modify blank lines at start of region.
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|
|
1572 (goto-char from)
|
|
|
1573 (while (and (< (point) endmark) (eolp))
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|
|
1574 (forward-line 1))
|
|
|
1575 ;; Add or remove backslashes on all the lines.
|
|
|
1576 (while (and (< (point) endmark)
|
|
|
1577 ;; Don't backslashify the last line
|
|
|
1578 ;; if the region ends right at the start of the next line.
|
|
|
1579 (save-excursion
|
|
|
1580 (forward-line 1)
|
|
|
1581 (< (point) endmark)))
|
|
|
1582 (if (not delete-flag)
|
|
|
1583 (c-append-backslash column)
|
|
|
1584 (c-delete-backslash))
|
|
|
1585 (forward-line 1))
|
|
|
1586 (move-marker endmark nil))))
|
|
|
1587
|
|
|
1588 (defun c-append-backslash (column)
|
|
|
1589 (end-of-line)
|
|
|
1590 ;; Note that "\\\\" is needed to get one backslash.
|
|
|
1591 (if (= (preceding-char) ?\\)
|
|
|
1592 (progn (forward-char -1)
|
|
|
1593 (delete-horizontal-space)
|
|
|
1594 (indent-to column))
|
|
|
1595 (indent-to column)
|
|
|
1596 (insert "\\")))
|
|
|
1597
|
|
|
1598 (defun c-delete-backslash ()
|
|
|
1599 (end-of-line)
|
|
|
1600 (or (bolp)
|
|
|
1601 (progn
|
|
|
1602 (forward-char -1)
|
|
|
1603 (if (looking-at "\\\\")
|
|
|
1604 (delete-region (1+ (point))
|
|
|
1605 (progn (skip-chars-backward " \t") (point)))))))
|
|
|
1606
|
|
|
1607 (defun c-up-conditional (count)
|
|
|
1608 "Move back to the containing preprocessor conditional, leaving mark behind.
|
|
|
1609 A prefix argument acts as a repeat count. With a negative argument,
|
|
|
1610 move forward to the end of the containing preprocessor conditional.
|
|
|
1611 When going backwards, `#elif' is treated like `#else' followed by `#if'.
|
|
|
1612 When going forwards, `#elif' is ignored."
|
|
|
1613 (interactive "p")
|
|
|
1614 (c-forward-conditional (- count) t))
|
|
|
1615
|
|
|
1616 (defun c-backward-conditional (count &optional up-flag)
|
|
|
1617 "Move back across a preprocessor conditional, leaving mark behind.
|
|
|
1618 A prefix argument acts as a repeat count. With a negative argument,
|
|
|
1619 move forward across a preprocessor conditional."
|
|
|
1620 (interactive "p")
|
|
|
1621 (c-forward-conditional (- count) up-flag))
|
|
|
1622
|
|
|
1623 (defun c-forward-conditional (count &optional up-flag)
|
|
|
1624 "Move forward across a preprocessor conditional, leaving mark behind.
|
|
|
1625 A prefix argument acts as a repeat count. With a negative argument,
|
|
|
1626 move backward across a preprocessor conditional."
|
|
|
1627 (interactive "p")
|
|
|
1628 (let* ((forward (> count 0))
|
|
|
1629 (increment (if forward -1 1))
|
|
|
1630 (search-function (if forward 're-search-forward 're-search-backward))
|
|
|
1631 (opoint (point))
|
|
|
1632 (new))
|
|
|
1633 (save-excursion
|
|
|
1634 (while (/= count 0)
|
|
|
1635 (let ((depth (if up-flag 0 -1)) found)
|
|
|
1636 (save-excursion
|
|
|
1637 ;; Find the "next" significant line in the proper direction.
|
|
|
1638 (while (and (not found)
|
|
|
1639 ;; Rather than searching for a # sign that comes
|
|
|
1640 ;; at the beginning of a line aside from whitespace,
|
|
|
1641 ;; search first for a string starting with # sign.
|
|
|
1642 ;; Then verify what precedes it.
|
|
|
1643 ;; This is faster on account of the fastmap feature of
|
|
|
1644 ;; the regexp matcher.
|
|
|
1645 (funcall search-function
|
|
|
1646 "#[ \t]*\\(if\\|elif\\|endif\\)"
|
|
|
1647 nil t))
|
|
|
1648 (beginning-of-line)
|
|
|
1649 ;; Now verify it is really a preproc line.
|
|
|
1650 (if (looking-at "^[ \t]*#[ \t]*\\(if\\|elif\\|endif\\)")
|
|
|
1651 (let ((prev depth))
|
|
|
1652 ;; Update depth according to what we found.
|
|
|
1653 (beginning-of-line)
|
|
|
1654 (cond ((looking-at "[ \t]*#[ \t]*endif")
|
|
|
1655 (setq depth (+ depth increment)))
|
|
|
1656 ((looking-at "[ \t]*#[ \t]*elif")
|
|
|
1657 (if (and forward (= depth 0))
|
|
|
1658 (setq found (point))))
|
|
|
1659 (t (setq depth (- depth increment))))
|
|
|
1660 ;; If we are trying to move across, and we find
|
|
|
1661 ;; an end before we find a beginning, get an error.
|
|
|
1662 (if (and (< prev 0) (< depth prev))
|
|
|
1663 (error (if forward
|
|
|
1664 "No following conditional at this level"
|
|
|
1665 "No previous conditional at this level")))
|
|
|
1666 ;; When searching forward, start from next line
|
|
|
1667 ;; so that we don't find the same line again.
|
|
|
1668 (if forward (forward-line 1))
|
|
|
1669 ;; If this line exits a level of conditional, exit inner loop.
|
|
|
1670 (if (< depth 0)
|
|
|
1671 (setq found (point))))
|
|
|
1672 ;; If the line is not really a conditional, skip past it.
|
|
|
1673 (if forward (end-of-line)))))
|
|
|
1674 (or found
|
|
|
1675 (error "No containing preprocessor conditional"))
|
|
|
1676 (goto-char (setq new found)))
|
|
|
1677 (setq count (+ count increment))))
|
|
|
1678 (push-mark)
|
|
|
1679 (goto-char new)))
|
|
|
1680
|
|
|
1681 ;;; c-mode.el ends here
|
