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1 ;;; modula2.el --- Modula-2 editing support package
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2 ;; Keywords: languages
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3
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4 ; Author Mick Jordan
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5 ; amended Peter Robinson
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6 ; ported to GNU Michael Schmidt
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7 ;;;From: "Michael Schmidt" <michael@pbinfo.UUCP>
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8 ;;;Modified by Tom Perrine <Perrin@LOGICON.ARPA> (TEP)
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9
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10
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11 ;;; Added by TEP
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12 (defvar m2-mode-syntax-table nil
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13 "Syntax table in use in Modula-2-mode buffers.")
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14
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15 (defvar m2-compile-command "m2c"
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16 "Command to compile Modula-2 programs")
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17
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18 (defvar m2-link-command "m2l"
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19 "Command to link Modula-2 programs")
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20
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21 (defvar m2-link-name nil
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22 "Name of the executable.")
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23
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24
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25 (if m2-mode-syntax-table
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26 ()
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27 (let ((table (make-syntax-table)))
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28 (modify-syntax-entry ?\\ "\\" table)
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29 (modify-syntax-entry ?\( ". 1" table)
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30 (modify-syntax-entry ?\) ". 4" table)
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31 (modify-syntax-entry ?* ". 23" table)
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32 (modify-syntax-entry ?+ "." table)
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33 (modify-syntax-entry ?- "." table)
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34 (modify-syntax-entry ?= "." table)
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35 (modify-syntax-entry ?% "." table)
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36 (modify-syntax-entry ?< "." table)
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37 (modify-syntax-entry ?> "." table)
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38 (modify-syntax-entry ?\' "\"" table)
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39 (setq m2-mode-syntax-table table)))
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40
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41 ;;; Added by TEP
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42 (defvar m2-mode-map nil
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43 "Keymap used in Modula-2 mode.")
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44
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45 (if m2-mode-map ()
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46 (let ((map (make-sparse-keymap)))
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47 (define-key map "\^i" 'm2-tab)
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48 (define-key map "\C-cb" 'm2-begin)
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49 (define-key map "\C-cc" 'm2-case)
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50 (define-key map "\C-cd" 'm2-definition)
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51 (define-key map "\C-ce" 'm2-else)
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52 (define-key map "\C-cf" 'm2-for)
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53 (define-key map "\C-ch" 'm2-header)
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54 (define-key map "\C-ci" 'm2-if)
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55 (define-key map "\C-cm" 'm2-module)
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56 (define-key map "\C-cl" 'm2-loop)
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57 (define-key map "\C-co" 'm2-or)
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58 (define-key map "\C-cp" 'm2-procedure)
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59 (define-key map "\C-c\C-w" 'm2-with)
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60 (define-key map "\C-cr" 'm2-record)
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61 (define-key map "\C-cs" 'm2-stdio)
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62 (define-key map "\C-ct" 'm2-type)
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63 (define-key map "\C-cu" 'm2-until)
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64 (define-key map "\C-cv" 'm2-var)
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65 (define-key map "\C-cw" 'm2-while)
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66 (define-key map "\C-cx" 'm2-export)
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67 (define-key map "\C-cy" 'm2-import)
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68 (define-key map "\C-c{" 'm2-begin-comment)
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69 (define-key map "\C-c}" 'm2-end-comment)
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70 (define-key map "\C-j" 'm2-newline)
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71 (define-key map "\C-c\C-z" 'suspend-emacs)
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72 (define-key map "\C-c\C-v" 'm2-visit)
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73 (define-key map "\C-c\C-t" 'm2-toggle)
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74 (define-key map "\C-c\C-l" 'm2-link)
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75 (define-key map "\C-c\C-c" 'm2-compile)
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76 (setq m2-mode-map map)))
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77
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78 (defvar m2-indent 5 "*This variable gives the indentation in Modula-2-Mode")
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79
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80 ;;;###autoload
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81 (defun modula-2-mode ()
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82 "This is a mode intended to support program development in Modula-2.
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83 All control constructs of Modula-2 can be reached by typing
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84 Control-C followed by the first character of the construct.
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85 \\{m2-mode-map}
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86 Control-c b begin Control-c c case
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87 Control-c d definition Control-c e else
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88 Control-c f for Control-c h header
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89 Control-c i if Control-c m module
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90 Control-c l loop Control-c o or
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91 Control-c p procedure Control-c Control-w with
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92 Control-c r record Control-c s stdio
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93 Control-c t type Control-c u until
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94 Control-c v var Control-c w while
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95 Control-c x export Control-c y import
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96 Control-c { begin-comment Control-c } end-comment
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97 Control-c Control-z suspend-emacs Control-c Control-t toggle
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98 Control-c Control-c compile Control-x ` next-error
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99 Control-c Control-l link
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100
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101 m2-indent controls the number of spaces for each indentation.
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102 m2-compile-command holds the command to compile a Modula-2 program.
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103 m2-link-command holds the command to link a Modula-2 program."
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104 (interactive)
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105 (kill-all-local-variables)
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106 (use-local-map m2-mode-map)
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107 (setq major-mode 'modula-2-mode)
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108 (setq mode-name "Modula-2")
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109 (make-local-variable 'comment-column)
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110 (setq comment-column 41)
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111 (make-local-variable 'end-comment-column)
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112 (setq end-comment-column 75)
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113 (set-syntax-table m2-mode-syntax-table)
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114 (make-local-variable 'paragraph-start)
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115 (setq paragraph-start (concat "^$\\|" page-delimiter))
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116 (make-local-variable 'paragraph-separate)
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117 (setq paragraph-separate paragraph-start)
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118 (make-local-variable 'paragraph-ignore-fill-prefix)
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119 (setq paragraph-ignore-fill-prefix t)
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120 ; (make-local-variable 'indent-line-function)
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121 ; (setq indent-line-function 'c-indent-line)
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122 (make-local-variable 'require-final-newline)
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123 (setq require-final-newline t)
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124 (make-local-variable 'comment-start)
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125 (setq comment-start "(* ")
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126 (make-local-variable 'comment-end)
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127 (setq comment-end " *)")
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128 (make-local-variable 'comment-column)
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129 (setq comment-column 41)
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130 (make-local-variable 'comment-start-skip)
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131 (setq comment-start-skip "/\\*+ *")
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132 (make-local-variable 'comment-indent-hook)
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133 (setq comment-indent-hook 'c-comment-indent)
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134 (make-local-variable 'parse-sexp-ignore-comments)
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135 (setq parse-sexp-ignore-comments t)
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136 (run-hooks 'm2-mode-hook))
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137
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138 (defun m2-newline ()
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139 "Insert a newline and indent following line like previous line."
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140 (interactive)
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141 (let ((hpos (current-indentation)))
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142 (newline)
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143 (indent-to hpos)))
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144
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145 (defun m2-tab ()
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146 "Indent to next tab stop."
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147 (interactive)
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148 (indent-to (* (1+ (/ (current-indentation) m2-indent)) m2-indent)))
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149
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150 (defun m2-begin ()
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151 "Insert a BEGIN keyword and indent for the next line."
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152 (interactive)
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153 (insert "BEGIN")
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154 (m2-newline)
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155 (m2-tab))
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156
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157 (defun m2-case ()
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158 "Build skeleton CASE statment, prompting for the <expression>."
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159 (interactive)
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160 (let ((name (read-string "Case-Expression: ")))
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161 (insert "CASE " name " OF")
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162 (m2-newline)
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163 (m2-newline)
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164 (insert "END (* case " name " *);"))
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165 (end-of-line 0)
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166 (m2-tab))
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167
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168 (defun m2-definition ()
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169 "Build skeleton DEFINITION MODULE, prompting for the <module name>."
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170 (interactive)
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171 (insert "DEFINITION MODULE ")
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172 (let ((name (read-string "Name: ")))
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173 (insert name ";\n\n\n\nEND " name ".\n"))
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174 (previous-line 3))
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175
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176 (defun m2-else ()
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177 "Insert ELSE keyword and indent for next line."
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178 (interactive)
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179 (m2-newline)
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180 (backward-delete-char-untabify m2-indent ())
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181 (insert "ELSE")
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182 (m2-newline)
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183 (m2-tab))
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184
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185 (defun m2-for ()
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186 "Build skeleton FOR loop statment, prompting for the loop parameters."
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187 (interactive)
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188 (insert "FOR ")
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189 (let ((name (read-string "Loop Initialiser: ")) limit by)
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190 (insert name " TO ")
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191 (setq limit (read-string "Limit: "))
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192 (insert limit)
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193 (setq by (read-string "Step: "))
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194 (if (not (string-equal by ""))
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195 (insert " BY " by))
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196 (insert " DO")
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197 (m2-newline)
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198 (m2-newline)
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199 (insert "END (* for " name " to " limit " *);"))
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200 (end-of-line 0)
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201 (m2-tab))
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202
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203 (defun m2-header ()
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204 "Insert a comment block containing the module title, author, etc."
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205 (interactive)
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206 (insert "(*\n Title: \t")
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207 (insert (read-string "Title: "))
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208 (insert "\n Created:\t")
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209 (insert (current-time-string))
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210 (insert "\n Author: \t")
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211 (insert (user-full-name))
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212 (insert (concat "\n\t\t<" (user-login-name) "@" (system-name) ">\n"))
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213 (insert "*)\n\n"))
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214
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215 (defun m2-if ()
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216 "Insert skeleton IF statment, prompting for <boolean-expression>."
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217 (interactive)
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218 (insert "IF ")
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219 (let ((thecondition (read-string "<boolean-expression>: ")))
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220 (insert thecondition " THEN")
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221 (m2-newline)
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222 (m2-newline)
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223 (insert "END (* if " thecondition " *);"))
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224 (end-of-line 0)
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225 (m2-tab))
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226
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227 (defun m2-loop ()
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228 "Build skeleton LOOP (with END)."
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229 (interactive)
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230 (insert "LOOP")
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231 (m2-newline)
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232 (m2-newline)
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233 (insert "END (* loop *);")
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234 (end-of-line 0)
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235 (m2-tab))
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236
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237 (defun m2-module ()
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238 "Build skeleton IMPLEMENTATION MODULE, prompting for <module-name>."
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239 (interactive)
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240 (insert "IMPLEMENTATION MODULE ")
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241 (let ((name (read-string "Name: ")))
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242 (insert name ";\n\n\n\nEND " name ".\n")
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243 (previous-line 3)
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244 (m2-header)
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245 (m2-type)
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246 (newline)
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247 (m2-var)
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248 (newline)
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249 (m2-begin)
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250 (m2-begin-comment)
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251 (insert " Module " name " Initialisation Code "))
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252 (m2-end-comment)
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253 (newline)
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254 (m2-tab))
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255
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256 (defun m2-or ()
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257 (interactive)
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258 (m2-newline)
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259 (backward-delete-char-untabify m2-indent)
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260 (insert "|")
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261 (m2-newline)
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262 (m2-tab))
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263
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264 (defun m2-procedure ()
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265 (interactive)
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266 (insert "PROCEDURE ")
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267 (let ((name (read-string "Name: " ))
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268 args)
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269 (insert name " (")
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270 (insert (read-string "Arguments: ") ")")
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271 (setq args (read-string "Result Type: "))
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272 (if (not (string-equal args ""))
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273 (insert " : " args))
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274 (insert ";")
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275 (m2-newline)
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276 (insert "BEGIN")
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277 (m2-newline)
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278 (m2-newline)
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279 (insert "END ")
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280 (insert name)
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281 (insert ";")
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282 (end-of-line 0)
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283 (m2-tab)))
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284
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285 (defun m2-with ()
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286 (interactive)
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287 (insert "WITH ")
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288 (let ((name (read-string "Record-Type: ")))
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289 (insert name)
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290 (insert " DO")
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291 (m2-newline)
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292 (m2-newline)
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293 (insert "END (* with " name " *);"))
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294 (end-of-line 0)
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295 (m2-tab))
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296
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297 (defun m2-record ()
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298 (interactive)
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299 (insert "RECORD")
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300 (m2-newline)
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301 (m2-newline)
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302 (insert "END (* record *);")
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303 (end-of-line 0)
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304 (m2-tab))
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305
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306 (defun m2-stdio ()
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307 (interactive)
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308 (insert "
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309 >FROM TextIO IMPORT
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310 WriteCHAR, ReadCHAR, WriteINTEGER, ReadINTEGER,
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311 WriteCARDINAL, ReadCARDINAL, WriteBOOLEAN, ReadBOOLEAN,
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312 WriteREAL, ReadREAL, WriteBITSET, ReadBITSET,
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313 WriteBasedCARDINAL, ReadBasedCARDINAL, WriteChars, ReadChars,
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314 WriteString, ReadString, WhiteSpace, EndOfLine;
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315
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316 >FROM SysStreams IMPORT sysIn, sysOut, sysErr;
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317
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318 "))
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319
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320 (defun m2-type ()
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321 (interactive)
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322 (insert "TYPE")
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323 (m2-newline)
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324 (m2-tab))
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325
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326 (defun m2-until ()
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327 (interactive)
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328 (insert "REPEAT")
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329 (m2-newline)
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330 (m2-newline)
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331 (insert "UNTIL ")
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332 (insert (read-string "<boolean-expression>: ") ";")
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333 (end-of-line 0)
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334 (m2-tab))
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335
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336 (defun m2-var ()
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337 (interactive)
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338 (m2-newline)
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339 (insert "VAR")
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340 (m2-newline)
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341 (m2-tab))
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342
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343 (defun m2-while ()
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344 (interactive)
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345 (insert "WHILE ")
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346 (let ((name (read-string "<boolean-expression>: ")))
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347 (insert name " DO" )
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348 (m2-newline)
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349 (m2-newline)
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350 (insert "END (* while " name " *);"))
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351 (end-of-line 0)
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352 (m2-tab))
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353
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354 (defun m2-export ()
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355 (interactive)
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356 (insert "EXPORT QUALIFIED "))
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357
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358 (defun m2-import ()
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359 (interactive)
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360 (insert "FROM ")
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361 (insert (read-string "Module: "))
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362 (insert " IMPORT "))
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363
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364 (defun m2-begin-comment ()
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365 (interactive)
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366 (if (not (bolp))
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367 (indent-to comment-column 0))
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368 (insert "(* "))
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369
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370 (defun m2-end-comment ()
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371 (interactive)
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372 (if (not (bolp))
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373 (indent-to end-comment-column))
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374 (insert "*)"))
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375
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376 (defun m2-compile ()
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377 (interactive)
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378 (setq modulename (buffer-name))
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379 (compile (concat m2-compile-command " " modulename)))
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380
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381 (defun m2-link ()
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382 (interactive)
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383 (setq modulename (buffer-name))
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384 (if m2-link-name
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385 (compile (concat m2-link-command " " m2-link-name))
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386 (compile (concat m2-link-command " "
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387 (setq m2-link-name (read-string "Name of executable: "
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388 modulename))))))
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389
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390 (defun execute-monitor-command (command)
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391 (let* ((shell shell-file-name)
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392 (csh (equal (file-name-nondirectory shell) "csh")))
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393 (call-process shell nil t t "-cf" (concat "exec " command))))
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394
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395 (defun m2-visit ()
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396 (interactive)
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397 (let ((deffile nil)
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398 (modfile nil)
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399 modulename)
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400 (save-excursion
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401 (setq modulename
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402 (read-string "Module name: "))
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403 (switch-to-buffer "*Command Execution*")
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404 (execute-monitor-command (concat "m2whereis " modulename))
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405 (goto-char (point-min))
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406 (condition-case ()
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407 (progn (re-search-forward "\\(.*\\.def\\) *$")
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408 (setq deffile (buffer-substring (match-beginning 1)
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409 (match-end 1))))
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410 (search-failed ()))
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411 (condition-case ()
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412 (progn (re-search-forward "\\(.*\\.mod\\) *$")
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413 (setq modfile (buffer-substring (match-beginning 1)
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414 (match-end 1))))
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415 (search-failed ()))
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416 (if (not (or deffile modfile))
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417 (error "I can find neither definition nor implementation of %s"
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418 modulename)))
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419 (cond (deffile
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420 (find-file deffile)
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421 (if modfile
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422 (save-excursion
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423 (find-file modfile))))
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424 (modfile
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425 (find-file modfile)))))
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426
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427 (defun m2-toggle ()
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428 "Toggle between .mod and .def files for the module."
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429 (interactive)
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430 (cond ((string-equal (substring (buffer-name) -4) ".def")
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431 (find-file-other-window
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432 (concat (substring (buffer-name) 0 -4) ".mod")))
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433 ((string-equal (substring (buffer-name) -4) ".mod")
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434 (find-file-other-window
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435 (concat (substring (buffer-name) 0 -4) ".def")))
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436 ((string-equal (substring (buffer-name) -3) ".mi")
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437 (find-file-other-window
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438 (concat (substring (buffer-name) 0 -3) ".md")))
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439 ((string-equal (substring (buffer-name) -3) ".md")
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440 (find-file-other-window
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441 (concat (substring (buffer-name) 0 -3) ".mi")))))
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