diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/dtoc/fdt.py | 104 |
1 files changed, 53 insertions, 51 deletions
diff --git a/tools/dtoc/fdt.py b/tools/dtoc/fdt.py index 9518a287a2..35453fbed9 100644 --- a/tools/dtoc/fdt.py +++ b/tools/dtoc/fdt.py @@ -29,6 +29,57 @@ def CheckErr(errnum, msg): raise ValueError('Error %d: %s: %s' % (errnum, libfdt.fdt_strerror(errnum), msg)) + +def BytesToValue(bytes): + """Converts a string of bytes into a type and value + + Args: + A string containing bytes + + Return: + A tuple: + Type of data + Data, either a single element or a list of elements. Each element + is one of: + TYPE_STRING: string value from the property + TYPE_INT: a byte-swapped integer stored as a 4-byte string + TYPE_BYTE: a byte stored as a single-byte string + """ + bytes = str(bytes) + size = len(bytes) + strings = bytes.split('\0') + is_string = True + count = len(strings) - 1 + if count > 0 and not strings[-1]: + for string in strings[:-1]: + if not string: + is_string = False + break + for ch in string: + if ch < ' ' or ch > '~': + is_string = False + break + else: + is_string = False + if is_string: + if count == 1: + return TYPE_STRING, strings[0] + else: + return TYPE_STRING, strings[:-1] + if size % 4: + if size == 1: + return TYPE_BYTE, bytes[0] + else: + return TYPE_BYTE, list(bytes) + val = [] + for i in range(0, size, 4): + val.append(bytes[i:i + 4]) + if size == 4: + return TYPE_INT, val[0] + else: + return TYPE_INT, val + + class Prop: """A device tree property @@ -49,7 +100,7 @@ class Prop: self.type = TYPE_BOOL self.value = True return - self.type, self.value = self.BytesToValue(bytes) + self.type, self.value = BytesToValue(bytes) def RefreshOffset(self, poffset): self._offset = poffset @@ -88,55 +139,6 @@ class Prop: while len(self.value) < len(newprop.value): self.value.append(val) - def BytesToValue(self, bytes): - """Converts a string of bytes into a type and value - - Args: - A string containing bytes - - Return: - A tuple: - Type of data - Data, either a single element or a list of elements. Each element - is one of: - TYPE_STRING: string value from the property - TYPE_INT: a byte-swapped integer stored as a 4-byte string - TYPE_BYTE: a byte stored as a single-byte string - """ - bytes = str(bytes) - size = len(bytes) - strings = bytes.split('\0') - is_string = True - count = len(strings) - 1 - if count > 0 and not strings[-1]: - for string in strings[:-1]: - if not string: - is_string = False - break - for ch in string: - if ch < ' ' or ch > '~': - is_string = False - break - else: - is_string = False - if is_string: - if count == 1: - return TYPE_STRING, strings[0] - else: - return TYPE_STRING, strings[:-1] - if size % 4: - if size == 1: - return TYPE_BYTE, bytes[0] - else: - return TYPE_BYTE, list(bytes) - val = [] - for i in range(0, size, 4): - val.append(bytes[i:i + 4]) - if size == 4: - return TYPE_INT, val[0] - else: - return TYPE_INT, val - @classmethod def GetEmpty(self, type): """Get an empty / zero value of the given type @@ -183,7 +185,7 @@ class Prop: bytes: New property value to set """ self.bytes = str(bytes) - self.type, self.value = self.BytesToValue(bytes) + self.type, self.value = BytesToValue(bytes) self.dirty = True def Sync(self, auto_resize=False): |