tools/yyacc

   1 #!/bin/sh
   2
   3 # yyacc - yacc wrapper
   4 #
   5 # Allows tokens to be written as `literal` and then automatically
   6 # substituted with #defined tokens.
   7 #
   8 # Usage:
   9 #       yyacc file.y filetab.h file.yy
  10 #
  11 # inputs:
  12 #       file.yy         yacc grammar with ` literals
  13 #
  14 # outputs:
  15 #       file.y          yacc grammar
  16 #       filetab.h       array of string <-> token mappings
  17 #
  18 # 03-13-93 - Documented and p moved in sed command (for some reason,
  19 #       s/x/y/p doesn't work).
  20 # 10-12-93 - Take basename as second argument.
  21 # 12-31-96 - reversed order of args to be compatible with GenFile rule
  22 # 03/19/02 (seiwald) - suffix symbols with _t to avoid conflicts
  23 #
  24
  25 outy=${1?}
  26 outh=${2?}
  27 in=${3?}
  28 out=`basename $in .yy`
  29
  30 T=/tmp/yy$$
  31 trap 'rm -f $T.*' 0
  32
  33 sed '
  34   : 1
  35   /`/{
  36     h
  37     s/[^`]*`\([^`]*\)`.*/\1/
  38     p
  39     g
  40     s/[^`]*`[^`]*`//
  41     b 1
  42   }
  43   d
  44 ' $in | sort -u | sed '
  45   h
  46   y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/
  47   s/:/_COLON/
  48   s/!/_BANG/
  49   s/&&/_AMPERAMPER/
  50   s/&/_AMPER/
  51   s/+/_PLUS/
  52   s/||/_BARBAR/
  53   s/|/_BAR/
  54   s/;/_SEMIC/
  55   s/-/_MINUS/
  56   s/</_LANGLE/
  57   s/>/_RANGLE/
  58   s/\./_PERIOD/
  59   s/?/_QUESTION/
  60   s/=/_EQUALS/
  61   s/,/_COMMA/
  62   s/\[/_LBRACKET/
  63   s/]/_RBRACKET/
  64   s/{/_LBRACE/
  65   s/}/_RBRACE/
  66   s/(/_LPAREN/
  67   s/)/_RPAREN/
  68   s/.*/&_t/
  69   G
  70   s/\n/ /
  71 ' > $T.1
  72
  73 sed '
  74   s:^\(.*\) \(.*\)$:s/`\2`/\1/g:
  75   s:\.:\\.:g
  76   s:\[:\\[:g
  77 ' $T.1 > $T.s
  78
  79 rm -f $outy $outh
  80
  81 (
  82   sed 's:^\(.*\) \(.*\)$:%token \1:' $T.1
  83   sed -f $T.s $in
  84 ) > $outy
  85
  86 (
  87   sed 's:^\(.*\) \(.*\)$: { "\2", \1 },:' $T.1
  88 ) > $outh