From e5f78aecc18f98288d14f568b052c8a8b35c0eff Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 22 Dec 2018 10:41:59 -0500
Subject: cfgtest.sh: added cfgtest_type_size(), cfgtest_unit_type_size().

---
 sofort/cfgtest.sh | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/sofort/cfgtest.sh b/sofort/cfgtest.sh
index caa000a..7f1555b 100644
--- a/sofort/cfgtest.sh
+++ b/sofort/cfgtest.sh
@@ -208,6 +208,55 @@ cfgtest_decl_presence()
 }
 
 
+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 "$mb_internal_str"
+	fi
+
+	return 0
+}
+
+
 cfgtest_library_presence()
 {
 	printf 'int main(void){return 0;}'                \
@@ -253,3 +302,11 @@ cfgtest_unit_decl_presence()
 	cfgtest_decl_presence "$@" || return 1
 	return 0
 }
+
+
+cfgtest_unit_type_size()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_type_size "$@" || return 1
+	return 0
+}
-- 
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