+dnl PSI_TYPE_INDIRECTION(type, size, pointer_level_var, array_size_var)
+AC_DEFUN(PSI_TYPE_INDIRECTION, [
+ AC_MSG_CHECKING(indirection of $1)
+ m4_define([pointer_level], m4_len(m4_bpatsubst([PSI_VAR_TYPE($1)], [[^*]])))
+ m4_define([array_size], [m4_bregexp([PSI_VAR_TYPE($1)], [@<:@\([0-9]+\)@:>@], [\1])])
+
+ ifelse(array_size.$2,0., [
+ AC_MSG_ERROR([cannot compute dynamic array size of a non-struct member])
+ ], [
+ ifelse(pointer_level,0,[
+ m4_define([type_size],[$]AS_TR_SH([ac_cv_sizeof_]m4_bregexp(PSI_VAR_TYPE([$1]), [^\( \|\w\)+], [\&])))
+ ],[
+ m4_define([type_size],$ac_cv_sizeof_void_p)
+ ])
+ ])
+
+ m4_case(array_size,,[
+ $3=pointer_level
+ $4=0]
+ ,0,[
+ $3=m4_incr(pointer_level)
+ $4="`expr $2 / type_size`"
+ ], [
+ $3=m4_incr(pointer_level)
+ $4=array_size
+ ])
+
+ AC_MSG_RESULT([[$]$3, [$]$4])
+])
+