#!/bin/csh -f
#
# makes the "database.h" (1st argument, $1) file from "database.h.in"
# (2nd argument, $2), setting various mask operation definitions
# according to the number of words implied by the value of TT_MAXTYPES

# The following mess grabs the value of TT_MAXTYPES from database.h.in
#
set maxtypes=`sed -n -e '/^#define[[:space:]]*TT_MAXTYPES/s/#define[[:space:]]*TT_MAXTYPES[[:space:]]*//p' < $1 | sed -e 's/\/\*[[:print:]]*\*\/[[:space:]]*//g' `
#
# Alternative method works with outdated versions of sed/ed.
#
if ($maxtypes == "") then
   set maxtypes=`sed -n -e '/^#define[ 	]*TT_MAXTYPES/s/#define[ 	]*TT_MAXTYPES[ 	]*//p' < $1 | sed -e 's/\/\*.*\*\/[ 	]*//g' `
endif
#
# If we can't generate database.h correctly, nothing is going to compile.
#
if ($maxtypes == "") then
   echo "Bad sed script in scripts/makedbh:  Cannot generate database/database.h!"
   exit
endif

# Find derived values from bits per word
# Note that bits-per-word should be determined from the compiler, but
# 32 bits per word has always been hardwired into magic.
#
set bpw = 32

# @ wordmask=$bpw - 1
# set wordshift=`echo "c=l($bpw); d=l(2); scale=0; c/d" | bc -l`
# @ maskwords=$maxtypes + $bpw - 1
# @ maskwords/=$bpw

@ maskwords=$maxtypes + $bpw - 1
@ maskwords/=$bpw


# Generate the main part of the database.h file from database.h.in
cat $1 > $2

# Generate a list of integers from 0 to the value of "maskwords" - 1
set count=""
@ maskwords--
while (${maskwords} >= 0)
   set count=`echo ${count} ${maskwords}`
   @ maskwords--
end

# NOTE: echo -n is not POSIX, not portable to newer Bourne-shells, so use printf
# NOTE:  Some OSes are known to buffer printf and echo independently, so do not
# intermix "echo" and "printf" or output may have lines out of order.

printf "#define TTMaskZero(m) ( \\\n" >> $2
foreach i (${count})
   printf "	(m)->tt_words[$i] = 0" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskIsZero(m) ( \\\n" >> $2
foreach i (${count})
   printf "	(m)->tt_words[$i] == 0" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf " && \\\n" >> $2
   endif
end

printf "#define TTMaskEqual(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	(m)->tt_words[$i] == (n)->tt_words[$i]" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf " && \\\n" >> $2
   endif
end

printf "#define TTMaskIntersect(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] & (n)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf " || \\\n" >> $2
   endif
end

printf "#define TTMaskCom(m) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] = ~(m)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskCom2(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] = ~(n)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskSetMask(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] |= (n)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskSetMask3(m, n, o) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] |= (n)->tt_words[$i] | (o)->tt_words[$i])" \
	>> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskAndMask(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] &= (n)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskAndMask3(m, n, o) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] = (n)->tt_words[$i] & (o)->tt_words[$i])" \
	>> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskClearMask(m, n) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] &= ~(n)->tt_words[$i])" >> $2
   if ($i == 0) then
      printf ")\n" >> $2
      printf "\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "#define TTMaskClearMask3(m, n, o) ( \\\n" >> $2
foreach i (${count})
   printf "	((m)->tt_words[$i] = (n)->tt_words[$i] & ~(o)->tt_words[$i])" \
	>> $2
   if ($i == 0) then
      printf ")\n" >> $2
   else
      printf ", \\\n" >> $2
   endif
end

printf "\n" >> $2
printf "#endif /* _DATABASE_H */\n" >> $2