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

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

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

# by a single invocation of cfgtest_host_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 (host/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_host_section()

{

	mb_cfgtest_cc="$ccenv_host_cc"

	mb_cfgtest_cfgtype='host'

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

	cfgtest_comment 'host-specific tests'

}

cfgtest_native_section()

{

	mb_cfgtest_cc="$mb_native_cc"

	mb_cfgtest_cfgtype='native'

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

	cfgtest_comment 'native system tests'

}

cfgtest_prolog()

{

	cfgtest_line_dots='.......................'

	cfgtest_line_dots="${cfgtest_line_dots}${cfgtest_line_dots}"

	cfgtest_tool_desc=" == trying ${mb_cfgtest_cfgtype} ${1}: ${2}"

	cfgtest_tool_dlen="${#cfgtest_line_dots}"

	printf '\n%s\n' '________________________' >&3

	printf "cfgtest: probing for ${mb_cfgtest_cfgtype} ${1}: ${2}\n\n" >&3

	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s" \

		"${cfgtest_tool_desc}  ${mb_line_dots}"

}

cfgtest_epilog()

{

	cfgtest_line_dots='.......................'

	cfgtest_tool_dlen="$((${#cfgtest_line_dots} - ${#2}))"

	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s  %s.\n" \

		"${cfgtest_line_dots}" "${2}"

	if [ "${2}" = '-----' ]; then

		printf '\n\ncfgtest: %s is missing or cannot be found.\n' "${1}" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	elif [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: %s is not defined or cannot be used.\n' "${1}" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	fi

}

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 = 'host' ]; 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 = 'host' ]; 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()

{

	cfgtest_prolog 'header' "${1}"

	printf '%s -E -xc - \\\n' "$mb_cfgtest_cc"  >&3

	for cfgtest_cflag in $mb_cfgtest_cflags; do

		printf '\t%s \\\n' "$cfgtest_cflag" >&3

	done

	printf '\t%s\n\n' '--include='"${1}" >&3

	cfgtest_cmd=$(printf '%s -E -xc - %s %s'     \

		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \

		'--include='"${1}")

	$(printf '%s' "$cfgtest_cmd")    \

		< /dev/null               \

		> /dev/null 2>&3           \

	|| cfgtest_epilog 'header' '-----'  \

	|| return

	mb_internal_str=$(printf '%s%s' '-DHAVE_' "${1}"  \

			| 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

	printf 'cfgtest: %s header <%s> was found and may be included.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'header' "${1}"

}

cfgtest_header_absence()

{

	cfgtest_prolog 'header absence' "${1}"

	printf '%s -E -xc - \\\n' "$mb_cfgtest_cc"  >&3

	for cfgtest_cflag in $mb_cfgtest_cflags; do

		printf '\t%s \\\n' "$cfgtest_cflag" >&3

	done

	printf '\t%s\n\n' '--include='"${1}" >&3

	cfgtest_cmd=$(printf '%s -E -xc - %s %s'     \

		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \

		'--include='"${1}")

	$(printf '%s' "$cfgtest_cmd")  \

		< /dev/null             \

		> /dev/null 2>&3         \

	&& cfgtest_epilog 'header' "${1}" \

	&& 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

	printf 'cfgtest: %s header <%s> may not be included.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'header' '-----'

}

cfgtest_interface_presence()

{

	cfgtest_prolog 'interface' "${1}"

	mb_internal_cflags=

	for mb_header in $mb_cfgtest_headers; do

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

	done

	cfgtest_code_snippet=$(printf 'void * addr = &%;;' "${1}")

	printf 'printf %s "%s" \\\n' "'%s'" "$cfgtest_code_snippet" >&3

	printf '| %s -S -xc - -o -' "$mb_cfgtest_cc"  >&3

	for cfgtest_cflag in $mb_cfgtest_cflags; do

		printf ' \\\n\t%s' "$cfgtest_cflag" >&3

	done

	for cfgtest_cflag in $mb_internal_cflags; do

		printf ' \\\n\t%s' "$cfgtest_cflag" >&3

	done

	printf '\n\n' >&3

	cfgtest_cmd=$(printf '%s -S -xc - -o - %s %s'  \

		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \

		"$mb_internal_cflags")

	printf '%s' "$cfgtest_code_snippet"     \

		| $(printf '%s' "$cfgtest_cmd") \

                > /dev/null 2>&3                \

       || cfgtest_epilog 'interface' '(error)'  \

       || return

	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

	printf 'cfgtest: %s interface `%s'"'"' is available.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'interface' "${1}"

	return 0

}

cfgtest_decl_presence()

{

	cfgtest_prolog 'decl' "${1}"

	mb_internal_cflags=

	for mb_header in $mb_cfgtest_headers; do

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

	done

	cfgtest_code_snippet=$(printf 'void * any = (void *)(%s);' "${1}")

	printf 'printf %s "%s" \\\n' "'%s'" "$cfgtest_code_snippet" >&3

	printf '| %s -S -xc - -o -' "$mb_cfgtest_cc"  >&3

	for cfgtest_cflag in $mb_cfgtest_cflags; do

		printf ' \\\n\t%s' "$cfgtest_cflag" >&3

	done

	for cfgtest_cflag in $mb_internal_cflags; do

		printf ' \\\n\t%s' "$cfgtest_cflag" >&3

	done

	printf '\n\n' >&3

	cfgtest_cmd=$(printf '%s -S -xc - -o - %s %s' \

		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \

		"$mb_internal_cflags")

	printf '%s' "$cfgtest_code_snippet"     \

		| $(printf '%s' "$cfgtest_cmd") \

                > /dev/null 2>&3                \

       || cfgtest_epilog 'decl' '(error)'     \

       || return

	# 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

		cfgtest_epilog 'decl' '(defined)'

		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

	printf 'cfgtest: `%s'"'"' is defined for the %s system.\n' \

		"${1}" "$mb_cfgtest_cfgtype" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'decl' '(defined)'

	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

}