From eab7025e2227edd157966c197e0fd96edea2d325 Mon Sep 17 00:00:00 2001
From: tduehr <tduehr@gmail.com>
Date: Wed, 15 Jan 2014 16:17:11 -0600
Subject: make function calls with enum arguments JustWork

matches behavior of JRuby FFI
---
 ext/ffi_c/Call.c | 81 ++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 64 insertions(+), 17 deletions(-)

diff --git a/ext/ffi_c/Call.c b/ext/ffi_c/Call.c
index 679bfba..820d977 100644
--- a/ext/ffi_c/Call.c
+++ b/ext/ffi_c/Call.c
@@ -126,19 +126,30 @@ rbffi_SetupCallParams(int argc, VALUE* argv, int paramCount, Type** paramTypes,
         switch (paramType->nativeType) {
 
             case NATIVE_INT8:
-                param->s8 = NUM2INT(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->s8 = NUM2INT(value);
+                } else {
+                    param->s8 = NUM2INT(argv[argidx]);
+                }
+
                 ++argidx;
                 ADJ(param, INT8);
                 break;
 
-
             case NATIVE_INT16:
-                param->s16 = NUM2INT(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->s16 = NUM2INT(value);
+
+                } else {
+                    param->s16 = NUM2INT(argv[argidx]);
+                }
+
                 ++argidx;
                 ADJ(param, INT16);
                 break;
 
-
             case NATIVE_INT32:
                 if (unlikely(type == T_SYMBOL && enums != Qnil)) {
                     VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
@@ -152,7 +163,6 @@ rbffi_SetupCallParams(int argc, VALUE* argv, int paramCount, Type** paramTypes,
                 ADJ(param, INT32);
                 break;
 
-
             case NATIVE_BOOL:
                 if (type != T_TRUE && type != T_FALSE) {
                     rb_raise(rb_eTypeError, "wrong argument type  (expected a boolean parameter)");
@@ -161,49 +171,86 @@ rbffi_SetupCallParams(int argc, VALUE* argv, int paramCount, Type** paramTypes,
                 ADJ(param, INT8);
                 break;
 
-
             case NATIVE_UINT8:
-                param->u8 = NUM2UINT(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->u8 = NUM2UINT(value);
+                } else {
+                    param->u8 = NUM2UINT(argv[argidx]);
+                }
+
                 ADJ(param, INT8);
                 ++argidx;
                 break;
 
-
             case NATIVE_UINT16:
-                param->u16 = NUM2UINT(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->u16 = NUM2UINT(value);
+                } else {
+                    param->u16 = NUM2UINT(argv[argidx]);
+                }
+
                 ADJ(param, INT16);
                 ++argidx;
                 break;
 
-
             case NATIVE_UINT32:
-                param->u32 = NUM2UINT(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->u32 = NUM2UINT(value);
+                } else {
+                    param->u32 = NUM2UINT(argv[argidx]);
+                }
+
                 ADJ(param, INT32);
                 ++argidx;
                 break;
 
-
             case NATIVE_INT64:
-                param->i64 = NUM2LL(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->i64 = NUM2LL(value);
+                } else {
+                    param->i64 = NUM2LL(argv[argidx]);
+                }
+
                 ADJ(param, INT64);
                 ++argidx;
                 break;
 
-
             case NATIVE_UINT64:
-                param->u64 = NUM2ULL(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    param->u64 = NUM2ULL(value);
+                } else {
+                    param->u64 = NUM2ULL(argv[argidx]);
+                }
+
                 ADJ(param, INT64);
                 ++argidx;
                 break;
 
             case NATIVE_LONG:
-                *(ffi_sarg *) param = NUM2LONG(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    *(ffi_sarg *) param = NUM2LONG(value);
+                } else {
+                    *(ffi_sarg *) param = NUM2LONG(argv[argidx]);
+                }
+
                 ADJ(param, LONG);
                 ++argidx;
                 break;
 
             case NATIVE_ULONG:
-                *(ffi_arg *) param = NUM2ULONG(argv[argidx]);
+                if (unlikely(type == T_SYMBOL && enums != Qnil)) {
+                    VALUE value = rb_funcall(enums, id_map_symbol, 1, argv[argidx]);
+                    *(ffi_sarg *) param = NUM2ULONG(value);
+                } else {
+                    *(ffi_arg *) param = NUM2ULONG(argv[argidx]);
+                }
+
                 ADJ(param, LONG);
                 ++argidx;
                 break;
-- 
cgit v1.2.1