Python binary object reader/writer
Project description
Byter
Python reader/writer for binary objects
Usage Example
with open(fpath, "rb") as data:
has_data = read_bool(data)
year = read_short(data)
month = read_short(data)
width = read_float(data)
height = read_float(data)
text = read_string(data, 70)
array = read_array(data, size, 'unsigned_short')
print("has_data:", has_data)
print("year:", year)
print("month:", month)
print("width:", width)
print("height:", height)
print("text": text)
print("array:")
>> has_data: True
year: 2019
month: 9
width: 1280.0
height: 1024.0
text: "Hello World!"
array: [13, 4, 16]
Types allowed to read/write
C Type | Python type | Size in bytes |
---|---|---|
char | string of length 1 | 1 |
signed char | integer | 1 |
unsigned char | integer | 1 |
bool | boolean | 1 |
short | integer | 2 |
unsigned short | integer | 2 |
int | integer | 4 |
unsigned int | integer | 4 |
long | integer | 4 |
unsigned long | integer | 4 |
long long | integer | 8 |
unsigned long long | integer | 8 |
float | float | 4 |
double | float | 8 |
char[] | string |
Methodes allowed
For each C type from the table in the previous section, there is a read_
and a write_
function that performs a reading/writing of a specified number of bytes from the binary object. For example,
a = read_unsigned_long(data)
will read 4 consequent bytes from the binary source data
.
However, to read an array of chars (string) the method is
s = read_string(data, s_len)
It is also possible to read an array of bytes using the following method:
arr = read_array(data, size, 'unsigned_short')
This will read a sequence of length size
of unsigned ints, size * 4
bytes in total.
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