X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=m4%2Fpsi_const.m4;h=6b86d11e0b529106cad7810b0a8e0820cee1a38e;hp=79373d36a1da6d5eb82206bd4acd05c9d5293d5d;hb=77a446cbcdce6558c00066e5f13e43e8b1b18ff7;hpb=b1720af16e5d7765e2effcd16e23f351c2f82e54

diff --git a/m4/psi_const.m4 b/m4/psi_const.m4
index 79373d3..6b86d11 100644
--- a/m4/psi_const.m4
+++ b/m4/psi_const.m4
@@ -1,12 +1,18 @@
-# add_str_const(name, value)
-add_str_const() {
-	cat >>$PSI_CONSTS <<<"	{PSI_T_STRING, \"string\", \"psi\\\\$1\", $2, PSI_T_QUOTED_STRING}, "
+# psi_add_str_const(name, value)
+# Add a pre-defined string constant to $PSI_CONSTS
+psi_add_str_const() {
+	grep -q "\"psi\\\\\\\\$1\"" $PSI_CONSTS || cat >>$PSI_CONSTS <<<"	{PSI_T_STRING, \"string\", \"psi\\\\$1\", $2, PSI_T_QUOTED_STRING}, "
 }
-# add_int_const(name, value)
-add_int_const() {
-	cat >>$PSI_CONSTS <<<"	{PSI_T_INT, \"int\", \"psi\\\\$1\", \"$2\", PSI_T_NUMBER}, "
+
+# psi_add_int_const(name, value)
+# Add a pre-defined int constant to $PSI_CONSTS
+psi_add_int_const() {
+	grep -q "\"psi\\\\\\\\$1\"" $PSI_CONSTS || cat >>$PSI_CONSTS <<<"	{PSI_T_INT, \"int\", \"psi\\\\$1\", \"$2\", PSI_T_NUMBER}, "
 }
+
 dnl PSI_CONST(const name, type)
+dnl Check the value of a str/int constant and add it to the list of pre-defined
+dnl constants.
 AC_DEFUN(PSI_CONST, [
 	AC_CACHE_CHECK(value of $1, psi_cv_const_$1, [
 		psi_const_val=
@@ -29,10 +35,10 @@ AC_DEFUN(PSI_CONST, [
 	then
 		case $2 in
 		str*)
-			add_str_const "$1" "$psi_cv_const_$1"
+			psi_add_str_const "$1" "$psi_cv_const_$1"
 			;;
 		int)
-			add_int_const "$1" "$psi_cv_const_$1"
+			psi_add_int_const "$1" "$psi_cv_const_$1"
 			;;
 		esac
 	fi