adafruit · dhalbert · Apr 6, 2022 · Feb 19, 2022 · Feb 20, 2022 · Feb 20, 2022
diff --git a/docs/library/zlib.rst b/docs/library/zlib.rst
@@ -5,6 +5,7 @@
 
 .. module:: zlib
    :synopsis: zlib decompression
+   :noindex:
 
 |see_cpython_module| :mod:`cpython:zlib`.
 
@@ -26,6 +27,7 @@ Functions
    CPython and is ignored.
 
 .. class:: DecompIO(stream, wbits=0, /)
+   :noindex:
 
    Create a ``stream`` wrapper which allows transparent decompression of
    compressed data in another *stream*. This allows to process compressed

diff --git a/lib/uzlib/uzlib.h b/lib/uzlib/uzlib.h
@@ -83,6 +83,8 @@ typedef struct {
 } TINF_TREE;
 
 struct uzlib_uncomp {
+    /* Point to the CircuitPython object that owns this decompression stream */
+    void *self;
     /* Pointer to the next byte in the input buffer */
     const unsigned char *source;
     /* Pointer to the next byte past the input buffer (source_limit = source + len) */

diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
@@ -3019,7 +3019,7 @@ msgstr ""
 msgid "complex values not supported"
 msgstr ""
 
-#: extmod/moduzlib.c
+#: extmod/moduzlib.c shared-module/zlib/DecompIO.c
 msgid "compression header"
 msgstr ""
 

diff --git a/ports/atmel-samd/boards/cp_sapling_m0_spiflash/mpconfigboard.mk b/ports/atmel-samd/boards/cp_sapling_m0_spiflash/mpconfigboard.mk
@@ -13,3 +13,4 @@ EXTERNAL_FLASH_DEVICES = AT25DF081A
 
 CIRCUITPY_AUDIOIO = 0
 CIRCUITPY_AUDIOBUSIO = 0
+CIRCUITPY_ZLIB = 0
diff --git a/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk b/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk
@@ -16,6 +16,7 @@ CIRCUITPY_PARALLELDISPLAY = 0
 CIRCUITPY_SDCARDIO = 0
 CIRCUITPY_SHARPDISPLAY = 0
 CIRCUITPY_TRACEBACK = 0
+CIRCUITPY_ZLIB=0
 
 # Include these Python libraries in firmware.
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_Requests

diff --git a/ports/atmel-samd/mpconfigport.mk b/ports/atmel-samd/mpconfigport.mk
@@ -46,6 +46,7 @@ CIRCUITPY_SYNTHIO ?= 0
 CIRCUITPY_TOUCHIO_USE_NATIVE ?= 1
 CIRCUITPY_ULAB = 0
 CIRCUITPY_VECTORIO = 0
+CIRCUITPY_ZLIB = 0
 
 # TODO: In CircuitPython 8.0, turn this back on, after `busio.OneWire` is removed.
 # We'd like a smoother transition, but we can't afford the space to have both

diff --git a/ports/nrf/boards/bluemicro833/mpconfigboard.mk b/ports/nrf/boards/bluemicro833/mpconfigboard.mk
@@ -42,6 +42,7 @@ CIRCUITPY_TRACEBACK = 0
 CIRCUITPY_ULAB = 0
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_VECTORIO = 0
+CIRCUITPY_ZLIB = 0
 
 MICROPY_PY_ASYNC_AWAIT = 0
 

diff --git a/ports/nrf/boards/pca10100/mpconfigboard.mk b/ports/nrf/boards/pca10100/mpconfigboard.mk
@@ -32,6 +32,7 @@ CIRCUITPY_SYNTHIO = 0
 CIRCUITPY_ULAB = 0
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_VECTORIO = 0
+CIRCUITPY_ZLIB = 0
 
 MICROPY_PY_ASYNC_AWAIT = 0
 

diff --git a/ports/nrf/boards/simmel/mpconfigboard.mk b/ports/nrf/boards/simmel/mpconfigboard.mk
@@ -42,6 +42,7 @@ CIRCUITPY_ULAB = 0
 CIRCUITPY_USB_CDC = 0
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_WATCHDOG = 1
+CIRCUITPY_ZLIB = 0
 
 # Enable micropython.native
 #CIRCUITPY_ENABLE_MPY_NATIVE = 1

diff --git a/ports/stm/boards/meowbit_v121/mpconfigboard.mk b/ports/stm/boards/meowbit_v121/mpconfigboard.mk
@@ -26,5 +26,6 @@ CIRCUITPY_BLEIO_HCI = 0
 CIRCUITPY_GIFIO = 0
 CIRCUITPY_ULAB = 0
 CIRCUITPY_STAGE = 1
+CIRCUITPY_ZLIB = 0
 
 FROZEN_MPY_DIRS += $(TOP)/frozen/circuitpython-stage/meowbit
diff --git a/ports/stm/boards/thunderpack_v11/mpconfigboard.mk b/ports/stm/boards/thunderpack_v11/mpconfigboard.mk
@@ -21,3 +21,4 @@ CIRCUITPY_BITMAPTOOLS = 0
 CIRCUITPY_BLEIO_HCI = 0
 CIRCUITPY_VECTORIO = 0
 CIRCUITPY_ULAB = 0
+CIRCUITPY_ZLIB = 0
diff --git a/ports/stm/boards/thunderpack_v12/mpconfigboard.mk b/ports/stm/boards/thunderpack_v12/mpconfigboard.mk
@@ -14,6 +14,7 @@ EXTERNAL_FLASH_DEVICES = GD25Q16C
 CIRCUITPY_NVM = 1
 CIRCUITPY_BITMAPTOOLS = 0
 CIRCUITPY_BLEIO_HCI = 0
+CIRCUITPY_ZLIB = 0
 
 MCU_SERIES = F4
 MCU_VARIANT = STM32F411xE

diff --git a/ports/unix/variants/coverage/mpconfigvariant.mk b/ports/unix/variants/coverage/mpconfigvariant.mk
@@ -36,6 +36,7 @@ SRC_BITMAP := \
 	shared-bindings/rainbowio/__init__.c \
 	shared-bindings/traceback/__init__.c \
 	shared-bindings/util.c \
+	shared-bindings/zlib/__init__.c \
 	shared-module/aesio/aes.c \
 	shared-module/aesio/__init__.c \
 	shared-module/bitmaptools/__init__.c \
@@ -44,7 +45,8 @@ SRC_BITMAP := \
 	shared-module/displayio/ColorConverter.c \
 	shared-module/displayio/ColorConverter.c \
 	shared-module/rainbowio/__init__.c \
-	shared-module/traceback/__init__.c
+	shared-module/traceback/__init__.c \
+	shared-module/zlib/__init__.c \
 
 $(info $(SRC_BITMAP))
 SRC_C += $(SRC_BITMAP)
@@ -55,7 +57,8 @@ CFLAGS += \
 	-DCIRCUITPY_DISPLAYIO_UNIX=1 \
 	-DCIRCUITPY_GIFIO=1 \
 	-DCIRCUITPY_RAINBOWIO=1 \
-	-DCIRCUITPY_TRACEBACK=1
+	-DCIRCUITPY_TRACEBACK=1 \
+	-DCIRCUITPY_ZLIB=1
 
 SRC_C += coverage.c
 SRC_CXX += coveragecpp.cpp
diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
@@ -331,6 +331,9 @@ endif
 ifeq ($(CIRCUITPY_USTACK),1)
 SRC_PATTERNS += ustack/%
 endif
+ifeq ($(CIRCUITPY_ZLIB),1)
+SRC_PATTERNS += zlib/%
+endif
 ifeq ($(CIRCUITPY_VIDEOCORE),1)
 SRC_PATTERNS += videocore/%
 endif
@@ -597,6 +600,7 @@ SRC_SHARED_MODULE_ALL = \
 	usb/core/__init__.c \
 	usb/core/Device.c \
 	ustack/__init__.c \
+	zlib/__init__.c \
 	vectorio/Circle.c \
 	vectorio/Polygon.c \
 	vectorio/Rectangle.c \
@@ -653,6 +657,17 @@ SRC_MOD += $(addprefix lib/protomatter/src/, \
 $(BUILD)/lib/protomatter/src/core.o: CFLAGS += -include "shared-module/rgbmatrix/allocator.h" -DCIRCUITPY -Wno-missing-braces -Wno-missing-prototypes
 endif
 
+ifeq ($(CIRCUITPY_ZLIB),1)
+SRC_MOD += $(addprefix lib/uzlib/, \
+	tinflate.c \
+	tinfzlib.c \
+	tinfgzip.c \
+	adler32.c \
+	crc32.c \
+)
+$(BUILD)/lib/uzlib/tinflate.o: CFLAGS += -Wno-missing-braces -Wno-missing-prototypes
+endif
+
 # All possible sources are listed here, and are filtered by SRC_PATTERNS.
 SRC_SHARED_MODULE_INTERNAL = \
 $(filter $(SRC_PATTERNS), \

diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
@@ -450,6 +450,10 @@ CFLAGS += -DUSB_NUM_ENDPOINT_PAIRS=$(USB_NUM_ENDPOINT_PAIRS)
 CIRCUITPY_USTACK ?= 0
 CFLAGS += -DCIRCUITPY_USTACK=$(CIRCUITPY_USTACK)
 
+# for decompressing utlities
+CIRCUITPY_ZLIB ?= 1
+CFLAGS += -DCIRCUITPY_ZLIB=$(CIRCUITPY_ZLIB)
+
 # ulab numerics library
 CIRCUITPY_ULAB ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_ULAB=$(CIRCUITPY_ULAB)

diff --git a/shared-bindings/zlib/__init__.c b/shared-bindings/zlib/__init__.c
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Mark Komus
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+#include <assert.h>
+#include <string.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+#include "py/stream.h"
+#include "py/mperrno.h"
+#include "py/builtin.h"
+#include "py/objtuple.h"
+#include "py/binary.h"
+#include "py/parsenum.h"
+
+#include "shared-bindings/zlib/__init__.h"
+
+#include "supervisor/shared/translate.h"
+
+//| """zlib decompression functionality
+//|
+//| The `zlib` module allows limited functionality similar to the CPython zlib library.
+//| This module allows to decompress binary data compressed with DEFLATE algorithm
+//| (commonly used in zlib library and gzip archiver). Compression is not yet implemented."""
+//|
+
+//| def zlib_decompress(data: bytes, wbits: Optional[int] = 0, bufsize: Optional[int] = 0) -> bytes:
+//|     """Return decompressed *data* as bytes. *wbits* is DEFLATE dictionary window
+//|     size used during compression (8-15, the dictionary size is power of 2 of
+//|     that value). Additionally, if value is positive, *data* is assumed to be
+//|     zlib stream (with zlib header). Otherwise, if it's negative, it's assumed
+//|     to be raw DEFLATE stream.
+//|
+//|     The wbits parameter controls the size of the history buffer (or “window size”), and what header
+//|     and trailer format is expected.
+//|
+//|     Common wbits values:
+//|
+//|     * To decompress deflate format, use wbits = -15
+//|     * To decompress zlib format, use wbits = 15
+//|     * To decompress gzip format, use wbits = 31
+//|
+//|     :param bytes data: data to be decompressed
+//|     :param int wbits: DEFLATE dictionary window size used during compression. See above.
+//|     :param int bufsize: ignored for compatibility with CPython only
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t zlib_decompress(size_t n_args, const mp_obj_t *args) {
+    bool is_zlib = true;
+    if (n_args > 1 && MP_OBJ_SMALL_INT_VALUE(args[1]) < 0) {
+        is_zlib = false;
+    }
+
+    return common_hal_zlib_decompress(args[0], is_zlib);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(zlib_decompress_obj, 1, 3, zlib_decompress);
+
+STATIC const mp_rom_map_elem_t zlib_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_zlib) },
+    { MP_ROM_QSTR(MP_QSTR_decompress), MP_ROM_PTR(&zlib_decompress_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(zlib_globals, zlib_globals_table);
+
+const mp_obj_module_t zlib_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t *)&zlib_globals,
+};
+
+MP_REGISTER_MODULE(MP_QSTR_zlib, zlib_module, CIRCUITPY_ZLIB);
diff --git a/shared-bindings/zlib/__init__.h b/shared-bindings/zlib/__init__.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Mark Komus
+ *
+ * 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 MICROPY_INCLUDED_SHARED_BINDINGS_ZLIB___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ZLIB___INIT___H
+
+mp_obj_t common_hal_zlib_decompress(mp_obj_t data, bool is_zlib);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ZLIB___INIT___H
Original file line number	Diff line number	Diff line change
Expand Up		@@ -13,3 +13,4 @@ EXTERNAL_FLASH_DEVICES = AT25DF081A

		CIRCUITPY_AUDIOIO = 0
		CIRCUITPY_AUDIOBUSIO = 0
		CIRCUITPY_ZLIB = 0