modzlibd: Decompress part of "zlib" module, based on miniz tinfl.c .

py/builtin.h

@@ -89,3 +89,4 @@ extern struct _dummy_t mp_sys_stderr_obj;
 
 // extmod modules
 extern const mp_obj_module_t mp_module_uctypes;
+extern const mp_obj_module_t mp_module_zlibd;

py/builtintables.c

@@ -196,6 +196,9 @@ STATIC const mp_map_elem_t mp_builtin_module_table[] = {
 #if MICROPY_PY_UCTYPES
     { MP_OBJ_NEW_QSTR(MP_QSTR_uctypes), (mp_obj_t)&mp_module_uctypes },
 #endif
+#if MICROPY_PY_ZLIBD
+    { MP_OBJ_NEW_QSTR(MP_QSTR_zlibd), (mp_obj_t)&mp_module_zlibd },
+#endif
 
     // extra builtin modules as defined by a port
     MICROPY_PORT_BUILTIN_MODULES

py/mpconfig.h

@@ -368,10 +368,15 @@ typedef double mp_float_t;
 
 
 // Extended modules
+
 #ifndef MICROPY_PY_UCTYPES
 #define MICROPY_PY_UCTYPES (0)
 #endif
 
+#ifndef MICROPY_PY_ZLIBD
+#define MICROPY_PY_ZLIBD (0)
+#endif
+
 /*****************************************************************************/
 /* Hooks for a port to add builtins                                          */
 

py/py.mk

@@ -104,7 +104,8 @@ PY_O_BASENAME = \
 	smallint.o \
 	pfenv.o \
 	pfenv_printf.o \
-	../extmod/moductypes.o
+	../extmod/moductypes.o \
+	../extmod/modzlibd.o \
 
 # prepend the build destination prefix to the py object files
 PY_O = $(addprefix $(PY_BUILD)/, $(PY_O_BASENAME))

py/qstrdefs.h

@@ -450,3 +450,8 @@ Q(getter)
 Q(setter)
 Q(deleter)
 #endif
+
+#if MICROPY_PY_ZLIBD
+Q(zlibd)
+Q(decompress)
+#endif