# cfgtest.sh: sofort's config test framework,

# for use from within a project's custom cfgdefs.sh.

# in the common scenario, target-specific tests are preceded

# by a single invocation of cfgtest_target_section, whereas

# native (build) system tests are preceded by the invocation

# of cfgtest_native_section.

# cfgdefs fraework variables:

# mb_cfgtest_cc:      the compiler used for the current test

# mb_cfgtest_cflags:  the compiler flags used for the current test

# mb_cfgtest_cfgtype: the type of the current test (target/native)

# mb_cfgtest_makevar: the make variable affected by the current test

# mb_cfgtest_headers: headers for ad-hoc inclusion with the current test

cfgtest_newline()

{

	printf '\n' >> $mb_pwd/cfgdefs.mk

}

cfgtest_comment()

{

	mb_internal_str='#'

	for mb_internal_arg ; do

		mb_internal_str="$mb_internal_str $mb_internal_arg"

	done

	printf '%s\n' "$mb_internal_str" >> $mb_pwd/cfgdefs.mk

}

cfgtest_target_section()

{

	mb_cfgtest_cc=$(make -s -f "$mb_pwd/Makefile.tmp" .display-cc)

	mb_cfgtest_cflags=$(make -s -f "$mb_pwd/Makefile.tmp" .display-cflags)

	mb_cfgtest_cfgtype='target'

	cfgtest_comment 'target-specific tests'

}

cfgtest_native_section()

{

	mb_cfgtest_cc="$mb_native_cc"

	mb_cfgtest_cflags="$mb_native_cflags"

	mb_cfgtest_cfgtype='native'

	cfgtest_comment 'native system tests'

}

cfgtest_makevar_append()

{

	mb_internal_str='+='

	for mb_internal_arg ; do

		if ! [ -z "$mb_internal_arg" ]; then

			mb_internal_str="$mb_internal_str $mb_internal_arg"

		fi

	done

	printf '%-24s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" \

		>> $mb_pwd/cfgdefs.mk

	unset cfgtest_internal_unit_test

}

cfgtest_cflags_append()

{

	if [ $mb_cfgtest_cfgtype = 'target' ]; then

		mb_internal_makevar='CFLAGS_CONFIG'

	else

		mb_internal_makevar='NATIVE_CFLAGS'

	fi

	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar

	mb_cfgtest_makevar=$mb_internal_makevar

	cfgtest_makevar_append "$@"

	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved

}

cfgtest_ldflags_append()

{

	if [ $mb_cfgtest_cfgtype = 'target' ]; then

		mb_internal_makevar='LDFLAGS_CONFIG'

	else

		mb_internal_makevar='NATIVE_LDFLAGS'

	fi

	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar

	mb_cfgtest_makevar=$mb_internal_makevar

	cfgtest_makevar_append "$@"

	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved

}

cfgtest_header_presence()

{

	$mb_cfgtest_cc -E -xc -             \

			$mb_cfgtest_cflags  \

			--include="$@"      \

		< /dev/null                 \

		> /dev/null 2>/dev/null     \

	|| return

	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"    \

			| sed -e 's/\./_/g' -e 's@/@_@g'  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

}

cfgtest_header_absence()

{

	$mb_cfgtest_cc -E -xc -             \

			$mb_cfgtest_cflags  \

			--include="$@"      \

		< /dev/null                 \

		> /dev/null 2>/dev/null     \

	&& return

	mb_internal_str=$(printf '%s%s' '-DHAVE_NO_' "$@" \

			| sed -e 's/\./_/g' -e 's@/@_@g'  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

}

cfgtest_interface_presence()

{

	mb_internal_cflags=''

	for mb_header in $mb_cfgtest_headers; do

		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"

	done

	printf 'void * addr = &%;;' "$@"                  \

			| $mb_cfgtest_cc -S -xc - -o -    \

			  $mb_cfgtest_cflags              \

			  $mb_internal_cflags             \

                > /dev/null 2>/dev/null                   \

	|| return 1

	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"  \

			| sed -e 's/\./_/g'             \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	return 0

}

cfgtest_decl_presence()

{

	mb_internal_cflags=''

	for mb_header in $mb_cfgtest_headers; do

		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"

	done

	printf 'void * any = (void *)%s;' "$@"            \

			| $mb_cfgtest_cc -S -xc - -o -    \

			  $mb_cfgtest_cflags              \

			  $mb_internal_cflags             \

                > /dev/null 2>/dev/null                   \

	|| return 1

	# does the argument solely consist of the macro or enum member name?

	mb_internal_str=$(printf '%s' "$@" | tr -d '[a-z][A-Z][0-9][_]')

	if [ -n "$mb_internal_str" ]; then

		return 0

	fi

	mb_internal_str=$(printf '%s%s' '-DHAVE_DECL_' "$@"  \

			| sed -e 's/\./_/g'                  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	return 0

}

cfgtest_type_size()

{

	mb_internal_cflags=''

	mb_internal_size=''

	mb_internal_test='char x[(sizeof(%s) == %s) ? 1 : -1];'

	for mb_header in $mb_cfgtest_headers; do

		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"

	done

	for mb_internal_guess in 8 4 2 1 16 32 64 128; do

		if [ -z $mb_internal_size ]; then

			mb_internal_type="$@"

			mb_internal_str=$(printf "$mb_internal_test"    \

				"$mb_internal_type"                     \

				"$mb_internal_guess")

			printf '%s' "$mb_internal_str"                  \

					| $mb_cfgtest_cc -S -xc - -o -  \

					  $mb_cfgtest_cflags            \

					  $mb_internal_cflags           \

				> /dev/null 2>/dev/null                 \

			&& mb_internal_size=$mb_internal_guess

		fi

	done

	# unrecognized type, or type size not within range

	if [ -z $mb_internal_size ]; then

		return 1

	fi

	# -DSIZEOF_TYPE=SIZE

	mb_internal_str=$(printf '%s%s=%s' '-DSIZEOF_'        \

				"$mb_internal_type"           \

				"$mb_internal_size"           \

			| sed -e 's/\ /_/g' -e 's/*/P/g'      \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	return 0

}

cfgtest_code_snippet()

{

	mb_internal_cflags=''

	mb_internal_test="$@"

	for mb_header in $mb_cfgtest_headers; do

		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"

	done

	printf '%s' "$mb_internal_test"                 \

			| $mb_cfgtest_cc -S -xc - -o -  \

			  $mb_cfgtest_cflags            \

			  $mb_internal_cflags           \

		> /dev/null 2>/dev/null                 \

	|| return 1

	return 0

}

cfgtest_library_presence()

{

	printf 'int main(void){return 0;}'                \

			| $mb_cfgtest_cc -o a.out -xc -   \

			  $mb_cfgtest_cflags              \

			  $@                              \

                > /dev/null 2>/dev/null                   \

	|| return 1

	rm -f a.out

	return 0

}

cfgtest_unit_header_presence()

{

	cfgtest_internal_unit_test='unit_test'

	cfgtest_header_presence "$@" || return 1

	return 0

}

cfgtest_unit_header_absence()

{

	cfgtest_internal_unit_test='unit_test'

	cfgtest_header_absence "$@" || return 1

	return 0

}

cfgtest_unit_interface_presence()

{

	cfgtest_internal_unit_test='unit_test'

	cfgtest_interface_presence "$@" || return 1

	return 0

}

cfgtest_unit_decl_presence()

{

	cfgtest_internal_unit_test='unit_test'

	cfgtest_decl_presence "$@" || return 1

	return 0

}

cfgtest_unit_type_size()

{

	cfgtest_internal_unit_test='unit_test'

	cfgtest_type_size "$@" || return 1

	return 0

}