2023-09-11 17:49:30 -04:00
|
|
|
import struct
|
|
|
|
|
from enum import IntEnum
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class GGUFValueType(IntEnum):
|
|
|
|
|
UINT8 = 0
|
|
|
|
|
INT8 = 1
|
|
|
|
|
UINT16 = 2
|
|
|
|
|
INT16 = 3
|
|
|
|
|
UINT32 = 4
|
|
|
|
|
INT32 = 5
|
|
|
|
|
FLOAT32 = 6
|
|
|
|
|
BOOL = 7
|
|
|
|
|
STRING = 8
|
|
|
|
|
ARRAY = 9
|
|
|
|
|
UINT64 = 10
|
|
|
|
|
INT64 = 11
|
|
|
|
|
FLOAT64 = 12
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
_simple_value_packing = {
|
|
|
|
|
GGUFValueType.UINT8: "<B",
|
|
|
|
|
GGUFValueType.INT8: "<b",
|
|
|
|
|
GGUFValueType.UINT16: "<H",
|
|
|
|
|
GGUFValueType.INT16: "<h",
|
|
|
|
|
GGUFValueType.UINT32: "<I",
|
|
|
|
|
GGUFValueType.INT32: "<i",
|
|
|
|
|
GGUFValueType.FLOAT32: "<f",
|
|
|
|
|
GGUFValueType.UINT64: "<Q",
|
|
|
|
|
GGUFValueType.INT64: "<q",
|
|
|
|
|
GGUFValueType.FLOAT64: "<d",
|
|
|
|
|
GGUFValueType.BOOL: "?",
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
value_type_info = {
|
|
|
|
|
GGUFValueType.UINT8: 1,
|
|
|
|
|
GGUFValueType.INT8: 1,
|
|
|
|
|
GGUFValueType.UINT16: 2,
|
|
|
|
|
GGUFValueType.INT16: 2,
|
|
|
|
|
GGUFValueType.UINT32: 4,
|
|
|
|
|
GGUFValueType.INT32: 4,
|
|
|
|
|
GGUFValueType.FLOAT32: 4,
|
|
|
|
|
GGUFValueType.UINT64: 8,
|
|
|
|
|
GGUFValueType.INT64: 8,
|
|
|
|
|
GGUFValueType.FLOAT64: 8,
|
|
|
|
|
GGUFValueType.BOOL: 1,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def get_single(value_type, file):
|
|
|
|
|
if value_type == GGUFValueType.STRING:
|
|
|
|
|
value_length = struct.unpack("<Q", file.read(8))[0]
|
2023-09-11 18:49:15 -04:00
|
|
|
value = file.read(value_length)
|
|
|
|
|
try:
|
|
|
|
|
value = value.decode('utf-8')
|
|
|
|
|
except:
|
|
|
|
|
pass
|
2023-09-11 17:49:30 -04:00
|
|
|
else:
|
|
|
|
|
type_str = _simple_value_packing.get(value_type)
|
|
|
|
|
bytes_length = value_type_info.get(value_type)
|
|
|
|
|
value = struct.unpack(type_str, file.read(bytes_length))[0]
|
|
|
|
|
|
|
|
|
|
return value
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def load_metadata(fname):
|
|
|
|
|
metadata = {}
|
|
|
|
|
with open(fname, 'rb') as file:
|
|
|
|
|
GGUF_MAGIC = struct.unpack("<I", file.read(4))[0]
|
|
|
|
|
GGUF_VERSION = struct.unpack("<I", file.read(4))[0]
|
|
|
|
|
ti_data_count = struct.unpack("<Q", file.read(8))[0]
|
|
|
|
|
kv_data_count = struct.unpack("<Q", file.read(8))[0]
|
2023-09-12 16:02:42 -04:00
|
|
|
|
|
|
|
|
if GGUF_VERSION == 1:
|
|
|
|
|
raise Exception('You are using an outdated GGUF, please download a new one.')
|
2023-09-11 17:49:30 -04:00
|
|
|
|
|
|
|
|
for i in range(kv_data_count):
|
|
|
|
|
key_length = struct.unpack("<Q", file.read(8))[0]
|
|
|
|
|
key = file.read(key_length)
|
|
|
|
|
|
|
|
|
|
value_type = GGUFValueType(struct.unpack("<I", file.read(4))[0])
|
|
|
|
|
if value_type == GGUFValueType.ARRAY:
|
|
|
|
|
ltype = GGUFValueType(struct.unpack("<I", file.read(4))[0])
|
|
|
|
|
length = struct.unpack("<Q", file.read(8))[0]
|
|
|
|
|
for j in range(length):
|
|
|
|
|
_ = get_single(ltype, file)
|
|
|
|
|
else:
|
|
|
|
|
value = get_single(value_type, file)
|
|
|
|
|
metadata[key.decode()] = value
|
|
|
|
|
|
|
|
|
|
return metadata
|
