Add intfstream_read/intfstream_write

libretro-common/include/streams/interface_stream.h

@@ -56,4 +56,10 @@ bool intfstream_resize(intfstream_internal_t *intf,
 bool intfstream_open(intfstream_internal_t *intf,
       const char *path, unsigned mode, ssize_t len);
 
+ssize_t intfstream_read(intfstream_internal_t *intf,
+      void *s, size_t len);
+
+ssize_t intfstream_write(intfstream_internal_t *intf,
+      const void *s, size_t len);
+
 #endif

libretro-common/streams/interface_stream.c

@@ -98,3 +98,34 @@ error:
    return NULL;
 }
 
+ssize_t intfstream_read(intfstream_internal_t *intf, void *s, size_t len)
+{
+   if (!intf)
+      return 0;
+
+   switch (intf->type)
+   {
+      case INTFSTREAM_FILE:
+         return filestream_read(intf->file.fp, s, len);
+      case INTFSTREAM_MEMORY:
+         return memstream_read(intf->memory.fp, s, len);
+   }
+
+   return 0;
+}
+
+ssize_t intfstream_write(intfstream_internal_t *intf, const void *s, size_t len)
+{
+   if (!intf)
+      return 0;
+
+   switch (intf->type)
+   {
+      case INTFSTREAM_FILE:
+         return filestream_write(intf->file.fp, s, len);
+      case INTFSTREAM_MEMORY:
+         return memstream_write(intf->memory.fp, s, len);
+   }
+
+   return 0;
+}