#!/bin/sh

QMKSPEC=$1
VERBOSE=$2
SRCDIR=$3
OUTDIR=$4

# debuggery
[ "$VERBOSE" = "yes" ] && echo "Determining floating point  word-order... ($*)"

# build and run a test program
test -d "$OUTDIR/config.tests/unix/doubleformat" || mkdir -p "$OUTDIR/config.tests/unix/doubleformat"
"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" "$SRCDIR/config.tests/unix/doubleformat/doubleformattest.pro" -o "$OUTDIR/config.tests/unix/doubleformat/Makefile" >/dev/null 2>&1
cd "$OUTDIR/config.tests/unix/doubleformat"

DOUBLEFORMAT="UNKNOWN"
[ "$VERBOSE" = "yes" ] && $MAKE || $MAKE >/dev/null 2>&1

if [ -f ./doubleformattest ]; then
    : # nop
else
    [ "$VERBOSE" = "yes" ] && echo "Unknown floating point format!"
    exit 2
fi

# LE: strings | grep 0123ABCD0123ABCD
# BE: strings | grep DCBA3210DCBA3210
# 
# LE arm-swapped-dword-order: strings | grep ABCD0123ABCD0123
# BE arm-swapped-dword-order: strings | grep 3210DCBA3210DCBA (untested)


if strings ./doubleformattest | grep "0123ABCD0123ABCD" >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "     Normal little endian format"
    DOUBLEFORMAT="LITTLE"
elif strings ./doubleformattest | grep "ABCD0123ABCD0123" >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "     Swapped little endian format"
    DOUBLEFORMAT="LITTLESWAPPED"
elif strings ./doubleformattest | grep "DCBA3210DCBA3210" >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "     Normal big endian format"
    DOUBLEFORMAT="BIG"
elif strings ./doubleformattest | grep "3210DCBA3210DCBA" >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "     Swapped big endian format"
    DOUBLEFORMAT="BIGSWAPPED"
fi

# done
if [ "$DOUBLEFORMAT" = "LITTLE" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using little endian."
    exit 10
elif [ "$DOUBLEFORMAT" = "BIG" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using big endian."
    exit 11
elif [ "$DOUBLEFORMAT" = "LITTLESWAPPED" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using swapped little endian."
    exit 12
elif [ "$DOUBLEFORMAT" = "BIGSWAPPED" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using swapped big endian."
    exit 13
else
    [ "$VERBOSE" = "yes" ] && echo "Unknown floating point format!"
    exit 99
fi