#!/bin/bash

if [[ "$1" -eq 0 ]]; then 
    COMPILER=bin/c_compiler
elif [[ "$1" -eq 1 ]]; then
    COMPILER=bin/c_compiler
    make clean
    make -B ${COMPILER}
elif [[ "$1" -eq 2 ]]; then
    COMPILER=test_deliverable/c_compiler_ref.sh
fi

echo ""
echo "========================================"
echo " Testing compiler : ${COMPILER}"
echo ""

PASSED=0
CHECKED=0

mkdir -p working

for DRIVER in test_deliverable/testcases/*_driver.c ; do
    CHECKED=$(( CHECKED+1 ))
    NAME=$(basename $DRIVER _driver.c)
    TESTCODE=test_deliverable/testcases/$NAME.c
    
    printf "Test case %-15s :\t" $NAME
    
    # Compile driver with normal GCC
    mips-linux-gnu-gcc -c $DRIVER -o working/${NAME}_driver.o 2> working/${NAME}_driver.compile.stderr
    if [[ $? -ne 0 ]]; then
        printf "\e[1;31mError\e[0m : Couldn't compile driver program using GCC.\n"
        continue
    fi
    
    # Compile test function with compiler under test to assembly
    cat $TESTCODE | $COMPILER > working/$NAME.s  2> working/${NAME}.compile.stderr
    if [[ $? -ne 0 ]]; then
    	printf "\e[1;31mError\e[0m : Compiler returned error message.\n"
    	continue
    fi
    
    # Link driver object and assembly into executable
    mips-linux-gnu-gcc -static working/${NAME}.s working/${NAME}_driver.o -o working/${NAME}.elf 2> working/${NAME}.link.stderr
    if [[ $? -ne 0 ]]; then
	    printf "\e[1;31mError\e[0m : Linker returned error message.\n"
        continue
    fi
    
    # Run the actual executable
    qemu-mips working/${NAME}.elf > working/$NAME.elf.stdout
    RESULT=$?
    if [[ "$RESULT" -ne 0 ]]; then
        printf "\e[1;31mError\e[0m : Testcase returned $RESULT, but expected 0.\n"
	    continue
    fi

    printf "\e[1;32mPass\e[0m\n"
    PASSED=$(( PASSED+1 ))
done

echo "########################################"
echo " Passed ${PASSED} out of ${CHECKED}"
echo ""