[WIP] scripted-diff: Avoid name collisions in CChainState #15795

-BEGIN VERIFY SCRIPT-
SRC=("chainActive" "mapBlockIndex" "mapBlocksUnlinked" "pindexBestInvalid")
DST=("m_chain"     "m_block_index" "m_blocks_unlinked" "index_best_invalid")

 # Hand picked line ranges of CChainState member functions
 # Found with `git grep -n -p -W  'CChainState::'  | grep --extended-regexp ':[0-9]+:'   | sed --regexp-extended 's/src.validation.cpp.([0-9]+).*/\1/g' | tr '\n' ' '`
MEMBER_FUN_BEGIN=(1296 1562 1773 2266 2386 2445 2500 2515 2636 2738 2770 2859 2897 2934 3327 3449 3776 3796 4043 4063 4133 4134 4169 4281 4338 4490)
 # Found with `git grep -n -p -W  'CChainState::'  | grep --extended-regexp '\-[0-9]+\-}'| sed --regexp-extended 's/src.validation.cpp.([0-9]+).*/\1/g' | tr '\n' ' '`
MEMBER_FUN_END=(  1304 1617 2055 2310 2439 2497 2509 2596 2732 2765 2853 2891 2931 2978 3406 3526 3794 3844 4061 4127 4131 4167 4260 4285 4361 4672)

for i in ${!DST[*]}
do
 echo "Replace ${SRC[$i]} with ${DST[$i]} ..."
 sed -i -r -e "1,165{s/(    .+ \*?)${SRC[$i]}/\1${DST[$i]}/g}"   src/validation.cpp
 sed -i -e "s/g_chainstate.${SRC[$i]}/g_chainstate.${DST[$i]}/g" src/validation.cpp

 for j in ${!MEMBER_FUN_BEGIN[*]}
 do
  echo " ... from line ${MEMBER_FUN_BEGIN[$j]} to ${MEMBER_FUN_BEGIN[$j]}"
  sed -i -e "${MEMBER_FUN_BEGIN[$j]},${MEMBER_FUN_END[$j]}{s/\<${SRC[$i]}\>/${DST[$i]}/g}"  src/validation.cpp
 done
done
-END VERIFY SCRIPT-