part: implement mlx3ds_assets_open/read/close()

include/mlx3ds_embeddedassets.h

@@ -15,6 +15,9 @@
 
 # include <string.h>
 
+/// @brief Socket to an asset. Equivalent to a file descriptor.
+typedef void	*t_assetsocket;
+
 /// @brief Represents a file embedded with the program.
 typedef struct s_embeddedasset
 {
@@ -32,6 +35,26 @@ typedef struct s_embeddedasset
 /// @return A reference to the asset. NULL if the asset doesn't exist.
 const t_embeddedasset	*mlx3ds_assets_get(const char *name);
 
-// TODO add mlx3ds_assets_open()
+/// @brief Create a t_assetsocket from an asset.
+///
+/// @param name Name of the asset to open.
+/// @return A socket to the asset. NULL if error.
+t_assetsocket			mlx3ds_assets_open(const char *name);
+
+/// @brief Reads up to 'count' bytes of the asset content and write it in 'buf'.
+///
+/// @param asset The asset to read.
+/// @param buf The buffer to write the content to.
+///            Its size must be at least 'count' bytes.
+/// @param count The number of bytes to read.
+/// @return The number of bytes actually read. Can be lower than 'count'.
+///         0 if EOF reached.
+size_t					mlx3ds_assets_read(
+							t_assetsocket asset, void *buf, size_t count);
+
+/// @brief Close the asset socket to avoid leaks.
+///
+/// @param asset Asset to close.
+void					mlx3ds_assets_close(t_assetsocket asset);
 
 #endif