Merge pull request adafruit#837 from godlygeek/human_readable_oserror

dhalbert · web-flow · commit 54293397c573 · 2018-05-15T10:12:09.000-04:00
Human readable OSError messages
diff --git a/ports/atmel-samd/mpconfigport.h b/ports/atmel-samd/mpconfigport.h
@@ -188,6 +188,8 @@ extern const struct _mp_obj_module_t usb_hid_module;
     #define MICROPY_PY_BUILTINS_FROZENSET (1)
     #define MICROPY_PY_BUILTINS_STR_SPLITLINES (1)
     #define MICROPY_PY_BUILTINS_REVERSED (1)
+    #define MICROPY_PY_UERRNO (1)
+    #define MICROPY_PY_UERRNO_ERRORCODE (0)
     #define MICROPY_PY_URE (1)
     #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
     #define MICROPY_PY_FRAMEBUF         (1)
diff --git a/py/moduerrno.c b/py/moduerrno.c
@@ -100,6 +100,20 @@ const mp_obj_module_t mp_module_uerrno = {
 };
 
 qstr mp_errno_to_str(mp_obj_t errno_val) {
+    // For commonly encountered errors, return human readable strings
+    if (MP_OBJ_IS_SMALL_INT(errno_val)) {
+        switch (MP_OBJ_SMALL_INT_VALUE(errno_val)) {
+            case EPERM:  return MP_QSTR_Permission_space_denied;
+            case ENOENT: return MP_QSTR_No_space_such_space_file_slash_directory;
+            case EIO:    return MP_QSTR_Input_slash_output_space_error;
+            case EACCES: return MP_QSTR_Permission_space_denied;
+            case EEXIST: return MP_QSTR_File_space_exists;
+            case ENODEV: return MP_QSTR_Unsupported_space_operation;
+            case EINVAL: return MP_QSTR_Invalid_space_argument;
+        }
+    }
+
+    // Otherwise, return the Exxxx string for that error code
     #if MICROPY_PY_UERRNO_ERRORCODE
     // We have the errorcode dict so can do a lookup using the hash map
     mp_map_elem_t *elem = mp_map_lookup((mp_map_t*)&errorcode_dict.map, errno_val, MP_MAP_LOOKUP);
diff --git a/tests/basics/errno1.py b/tests/basics/errno1.py
@@ -11,7 +11,10 @@
 
 # check that errors are rendered in a nice way
 msg = str(OSError(uerrno.EIO))
-print(msg[:7], msg[-5:])
+print(msg[:7], msg[msg.find(']'):])
+
+msg = str(OSError(uerrno.ENOBUFS))
+print(msg[:7], msg[msg.find(']'):])
 
 # check that unknown errno is still rendered
 print(str(OSError(9999)))
diff --git a/tests/basics/errno1.py.exp b/tests/basics/errno1.py.exp
@@ -1,3 +1,4 @@
 <class 'int'>
-[Errno  ] EIO
+[Errno  ] Input/output error
+[Errno  ] ENOBUFS
 9999

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
`1`	`1`	`<class 'int'>`
`2`		`-[Errno ] EIO`
	`2`	`+[Errno ] Input/output error`
	`3`	`+[Errno ] ENOBUFS`
`3`	`4`	`9999`