modstruct: Rename module to "ustruct", to allow full Python-level impl.

py/builtin.h

@@ -87,7 +87,7 @@ extern const mp_obj_module_t mp_module_io;
 extern const mp_obj_module_t mp_module_math;
 extern const mp_obj_module_t mp_module_cmath;
 extern const mp_obj_module_t mp_module_micropython;
-extern const mp_obj_module_t mp_module_struct;
+extern const mp_obj_module_t mp_module_ustruct;
 extern const mp_obj_module_t mp_module_sys;
 extern const mp_obj_module_t mp_module_gc;
 

py/modstruct.c

@@ -197,7 +197,7 @@ STATIC mp_obj_t struct_pack(mp_uint_t n_args, const mp_obj_t *args) {
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(struct_pack_obj, 1, MP_OBJ_FUN_ARGS_MAX, struct_pack);
 
 STATIC const mp_map_elem_t mp_module_struct_globals_table[] = {
-    { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_struct) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_ustruct) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_calcsize), (mp_obj_t)&struct_calcsize_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_pack), (mp_obj_t)&struct_pack_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_unpack), (mp_obj_t)&struct_unpack_obj },
@@ -205,9 +205,9 @@ STATIC const mp_map_elem_t mp_module_struct_globals_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(mp_module_struct_globals, mp_module_struct_globals_table);
 
-const mp_obj_module_t mp_module_struct = {
+const mp_obj_module_t mp_module_ustruct = {
     .base = { &mp_type_module },
-    .name = MP_QSTR_struct,
+    .name = MP_QSTR_ustruct,
     .globals = (mp_obj_dict_t*)&mp_module_struct_globals,
 };
 

py/objmodule.c

@@ -142,7 +142,7 @@ STATIC const mp_map_elem_t mp_builtin_module_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR__collections), (mp_obj_t)&mp_module_collections },
 #endif
 #if MICROPY_PY_STRUCT
-    { MP_OBJ_NEW_QSTR(MP_QSTR_struct), (mp_obj_t)&mp_module_struct },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ustruct), (mp_obj_t)&mp_module_ustruct },
 #endif
 
 #if MICROPY_PY_BUILTINS_FLOAT

py/qstrdefs.h

@@ -461,7 +461,7 @@ Q(print_exception)
 #endif
 
 #if MICROPY_PY_STRUCT
-Q(struct)
+Q(ustruct)
 Q(pack)
 Q(unpack)
 Q(calcsize)
@@ -469,6 +469,7 @@ Q(calcsize)
 
 #if MICROPY_PY_UCTYPES
 Q(uctypes)
+Q(struct)
 Q(sizeof)
 Q(addressof)
 Q(bytes_at)

stmhal/mpconfigport.h

@@ -126,6 +126,7 @@ extern const struct _mp_obj_module_t mp_module_network;
     { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&mp_module_utime }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_select), (mp_obj_t)&mp_module_uselect }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_socket), (mp_obj_t)&mp_module_usocket }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_struct), (mp_obj_t)&mp_module_ustruct }, \
 
 // extra constants
 #define MICROPY_PORT_CONSTANTS \

tests/basics/struct1.py

-import struct
+try:
+    import ustruct as struct
+except:
+    import struct
 print(struct.calcsize("<bI"))
 print(struct.unpack("<bI", b"\x80\0\0\x01\0"))
 print(struct.calcsize(">bI"))

tests/float/float2int.py

 # check cases converting float to int, relying only on single precision float
 
-import struct
+try:
+    import ustruct as struct
+except:
+    import struct
 
 # work out configuration values
 is_64bit = struct.calcsize("P") == 8

tests/float/float2int_doubleprec.py

 # check cases converting float to int, requiring double precision float
 
-import struct
+try:
+    import ustruct as struct
+except:
+    import struct
 
 # work out configuration values
 is_64bit = struct.calcsize("P") == 8

tests/float/float_struct.py

 # test struct package with floats
 
-import struct
+try:
+    import ustruct as struct
+except:
+    import struct
 
 i = 1. + 1/2
 # TODO: it looks like '=' format modifier is not yet supported