From 5eb3bb05f7219f4b3a875df6840d8307b8ac2943 Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Wed, 6 Apr 2016 21:58:23 +0200
Subject: [PATCH] Start adding streams/interface_stream.c

---
 Makefile.common                               |  2 +
 griffin/griffin.c                             |  2 +
 .../include/streams/interface_stream.h        | 56 +++++++++++++++
 libretro-common/streams/interface_stream.c    | 72 +++++++++++++++++++
 4 files changed, 132 insertions(+)
 create mode 100644 libretro-common/include/streams/interface_stream.h
 create mode 100644 libretro-common/streams/interface_stream.c

diff --git a/Makefile.common b/Makefile.common
index f1afbd1f8f..ea1bcf7452 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -133,6 +133,8 @@ OBJ += frontend/frontend.o \
        libretro-common/lists/dir_list.o \
        libretro-common/file/retro_dirent.o \
        libretro-common/streams/file_stream.o \
+		 libretro-common/streams/interface_stream.o \
+		 libretro-common/streams/memory_stream.o \
        libretro-common/file/retro_stat.o \
        libretro-common/lists/string_list.o \
        libretro-common/string/stdstring.o \
diff --git a/griffin/griffin.c b/griffin/griffin.c
index 85ff5f5176..e6615ffef4 100644
--- a/griffin/griffin.c
+++ b/griffin/griffin.c
@@ -643,6 +643,8 @@ FILE
 #include "../libretro-common/lists/file_list.c"
 #include "../libretro-common/file/retro_dirent.c"
 #include "../libretro-common/streams/file_stream.c"
+#include "../libretro-common/streams/interface_stream.c"
+#include "../libretro-common/streams/memory_stream.c"
 #include "../libretro-common/file/retro_stat.c"
 #include "../list_special.c"
 #include "../libretro-common/string/stdstring.c"
diff --git a/libretro-common/include/streams/interface_stream.h b/libretro-common/include/streams/interface_stream.h
new file mode 100644
index 0000000000..3c106df27e
--- /dev/null
+++ b/libretro-common/include/streams/interface_stream.h
@@ -0,0 +1,56 @@
+/* Copyright  (C) 2010-2015 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (memory_stream.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_SDK_INTERFACE_STREAM_H
+#define _LIBRETRO_SDK_INTERFACE_STREAM_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <boolean.h>
+
+enum intfstream_type
+{
+   INTFSTREAM_FILE = 0,
+   INTFSTREAM_MEMORY
+};
+
+typedef struct intfstream_internal intfstream_internal_t;
+
+typedef struct intfstream intfstream_t;
+
+typedef struct intfstream_info
+{
+   struct
+   {
+      uint8_t *data;
+      unsigned size;
+   } buf;
+   enum intfstream_type type;
+} intfstream_info_t;
+
+void *intfstream_init(intfstream_info_t *info);
+
+bool intfstream_resize(intfstream_internal_t *intf,
+      intfstream_info_t *info);
+
+#endif
diff --git a/libretro-common/streams/interface_stream.c b/libretro-common/streams/interface_stream.c
new file mode 100644
index 0000000000..b183e2cc58
--- /dev/null
+++ b/libretro-common/streams/interface_stream.c
@@ -0,0 +1,72 @@
+#include <stdlib.h>
+
+#include <streams/interface_stream.h>
+#include <streams/file_stream.h>
+#include <streams/memory_stream.h>
+
+struct intfstream_internal
+{
+   enum intfstream_type type;
+
+   struct
+   {
+      struct
+      {
+         uint8_t *data;
+         unsigned size;
+      } buf;
+   } memory;
+};
+
+bool intfstream_resize(intfstream_internal_t *intf, intfstream_info_t *info)
+{
+   if (!intf || !info)
+      return false;
+
+   switch (intf->type)
+   {
+      case INTFSTREAM_FILE:
+         break;
+      case INTFSTREAM_MEMORY:
+         intf->memory.buf.data = info->buf.data;
+         intf->memory.buf.size = info->buf.size;
+
+         memstream_set_buffer(intf->memory.buf.data,
+               intf->memory.buf.size);
+         break;
+   }
+
+   return true;
+}
+
+void *intfstream_init(intfstream_info_t *info)
+{
+   intfstream_internal_t *intf = NULL;
+   if (!info)
+      goto error;
+
+   intf = (intfstream_internal_t*)calloc(1, sizeof(*intf));
+
+   if (!intf)
+      goto error;
+
+   intf->type = info->type;
+
+   switch (intf->type)
+   {
+      case INTFSTREAM_FILE:
+         break;
+      case INTFSTREAM_MEMORY:
+         if (!intfstream_resize(intf, info))
+            goto error;
+         break;
+   }
+
+   return intf;
+
+error:
+   if (intf)
+      free(intf);
+   return NULL;
+}
+