src/regex/mkh

   1 #! /bin/sh
   2 # mkh - pull headers out of C source
   3 PATH=/bin:/usr/bin ; export PATH
   4
   5 # egrep pattern to pick out marked lines
   6 egrep='^ =([    ]|$)'
   7
   8 # Sed program to process marked lines into lines for the header file.
   9 # The markers have already been removed.  Two things are done here:  removal
  10 # of backslashed newlines, and some fudging of comments.  The first is done
  11 # because -o needs to have prototypes on one line to strip them down.
  12 # Getting comments into the output is tricky; we turn C++-style // comments
  13 # into /* */ comments, after altering any existing */'s to avoid trouble.
  14 peel='  /\\$/N
  15         /\\\n[  ]*/s///g
  16         /\/\//s;\*/;* /;g
  17         /\/\//s;//\(.*\);/*\1 */;'
  18
  19 for a
  20 do
  21         case "$a" in
  22         -o)     # old (pre-function-prototype) compiler
  23                 # add code to comment out argument lists
  24                 peel="$peel
  25                         "'/^\([^#\/][^\/]*[a-zA-Z0-9_)]\)(\(.*\))/s;;\1(/*\2*/);'
  26                 shift
  27                 ;;
  28         -b)     # funny Berkeley __P macro
  29                 peel="$peel
  30                         "'/^\([^#\/][^\/]*[a-zA-Z0-9_)]\)(\(.*\))/s;;\1 __P((\2));'
  31                 shift
  32                 ;;
  33         -s)     # compiler doesn't like `static foo();'
  34                 # add code to get rid of the `static'
  35                 peel="$peel
  36                         "'/^static[     ][^\/]*[a-zA-Z0-9_)](.*)/s;static.;;'
  37                 shift
  38                 ;;
  39         -p)     # private declarations
  40                 egrep='^ ==([   ]|$)'
  41                 shift
  42                 ;;
  43         -i)     # wrap in #ifndef, argument is name
  44                 ifndef="$2"
  45                 shift ; shift
  46                 ;;
  47         *)      break
  48                 ;;
  49         esac
  50 done
  51
  52 if test " $ifndef" != " "
  53 then
  54         echo "#ifndef $ifndef"
  55         echo "#define   $ifndef /* never again */"
  56 fi
  57 echo "/* ========= begin header generated by $0 ========= */"
  58 echo '#ifdef __cplusplus'
  59 echo 'extern "C" {'
  60 echo '#endif'
  61 for f
  62 do
  63         echo
  64         echo "/* === $f === */"
  65         egrep "$egrep" $f | sed 's/^ ==*[       ]//;s/^ ==*$//' | sed "$peel"
  66         echo
  67 done
  68 echo '#ifdef __cplusplus'
  69 echo '}'
  70 echo '#endif'
  71 echo "/* ========= end header generated by $0 ========= */"
  72 if test " $ifndef" != " "
  73 then
  74         echo "#endif"
  75 fi
  76 exit 0