pkg/tinyvcdiff: add package

CODEOWNERS

@@ -108,6 +108,7 @@
 /pkg/openthread/                            @Hyungsin @jia200x
 /pkg/semtech-loramac/                       @aabadie @jia200x
 /pkg/tinydtls/                              @rfuentess @leandrolanzieri
+/pkg/tinyvcdiff/                            @jue89
 /pkg/u8g2/                                  @basilfx
 /pkg/ucglib/                                @basilfx
 /pkg/wakaama/                               @leandrolanzieri

pkg/Kconfig

@@ -64,6 +64,7 @@ rsource "tiny-asn1/Kconfig"
 rsource "tinycbor/Kconfig"
 rsource "tinycrypt/Kconfig"
 rsource "tinydtls/Kconfig"
+rsource "tinyvcdiff/Kconfig"
 rsource "tlsf/Kconfig"
 rsource "tweetnacl/Kconfig"
 rsource "u8g2/Kconfig"

pkg/tinyvcdiff/Kconfig

@@ -0,0 +1,22 @@
+# Copyright (c) 2022 Juergen Fitschen
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+menuconfig PACKAGE_TINYVCDIFF
+    bool "Tiny VCDIFF"
+    depends on TEST_KCONFIG
+
+if PACKAGE_TINYVCDIFF
+
+config TINYVCDIFF_BUFFER_SIZE
+    int "Buffer size"
+    default 128
+    help
+        For VCDIFF copy and run instruction the library requires a buffer.
+        The best performance is achieved for sizes of typical page sizes of
+        the underlying MTD or VFS backend. But a size of just 1 byte would
+        work, too.
+
+endif # PACKAGE_TINYVCDIFF

pkg/tinyvcdiff/Makefile

@@ -0,0 +1,9 @@
+PKG_NAME=tinyvcdiff
+PKG_URL=https://github.com/jue89/tiny-vcdiff.git
+PKG_VERSION=e1a679f36d0212f2b84057a70c72f6e9deda45b3
+PKG_LICENSE=MIT
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+all:
+	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src -f $(CURDIR)/$(PKG_NAME).mk

pkg/tinyvcdiff/Makefile.include

@@ -0,0 +1,10 @@
+# Buffer size for vcdiff
+CONFIG_TINYVCDIFF_BUFFER_SIZE ?= 128
+CFLAGS += -DVCDIFF_BUFFER_SIZE=$(CONFIG_TINYVCDIFF_BUFFER_SIZE)
+
+# Disable debugging if DEVELHELP is turned off
+ifneq ($(DEVELHELP),1)
+  CFLAGS += -DVCDIFF_NDEBUG
+endif
+
+INCLUDES += -I$(PKGDIRBASE)/tinyvcdiff/include

pkg/tinyvcdiff/doc.txt

@@ -0,0 +1,58 @@
+/**
+ * @defgroup pkg_tinyvcdiff   Tiny VCDIFF
+ * @ingroup  pkg
+ * @brief    Decoder for interleaved VCDIFF deltas
+ *
+ * # Introduction
+ *
+ * tiny-vcdiff is a decoder for binary delta files that have been generated by
+ * [open-vcdiff](https://github.com/google/open-vcdiff) in the interleaved format.
+ *
+ * # Usage
+ *
+ * Every delta requires a source (the known data) and a target (the reconstructed
+ * data). This implementation provides backends for the @ref drivers_mtd and
+ * @ref sys_vfs storage drivers.
+ *
+ * # Example
+ *
+ * The example down below uses a @ref drivers_mtd device as known source data and
+ * writes the resulting target data into a @ref sys_vfs file.
+ *
+ * ```c
+ * #include "vcdiff.h"
+ * #include "vcdiff_mtd.h"
+ * #include "vcdiff_vfs.h"
+ *
+ * int apply_delta (const uint8_t *data, size_t data_len,
+ *                  mtd_dev_t *source_mtd,
+ *                  int traget_fd)
+ * {
+ *     int rc;
+ *     vcdiff_t vcdiff;
+ *     vcdiff_init(&vcdiff);
+ *
+ *     /* make sure source_mtd is already powered on */
+ *     vcdiff_mtd_t source = VCDIFF_MTD_INIT(source_mtd);
+ *     vcdiff_set_source_driver(&vcdiff, &vcdiff_mtd_driver, &source);
+ *
+ *     /* make sure the vfs file is already opened for writing */
+ *     vcdiff_vfs_t target = VCDIFF_VFS_INIT(fd_target);
+ *     vcdiff_set_target_driver(&vcdiff, &vcdiff_vfs_driver, &target);
+ *
+ *     rc = vcdiff_apply_delta(&vcdiff, data, data_len);
+ *     if (rc != 0) {
+ *         return rc;
+ *     }
+ *
+ *     rc = vcdiff_finish(&vcdiff);
+ *     return rc;
+ * }
+ * ```
+ *
+ * # License
+ *
+ * Licensed under MIT.
+ *
+ * @see      https://github.com/jue89/tiny-vcdiff.git
+ */

pkg/tinyvcdiff/tinyvcdiff.mk

@@ -0,0 +1,3 @@
+MODULE = tinyvcdiff
+
+include $(RIOTBASE)/Makefile.base