diff options
Diffstat (limited to 'numpy/lib/format.py')
| -rw-r--r-- | numpy/lib/format.py | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/numpy/lib/format.py b/numpy/lib/format.py index 4f96ff4bc..a0405b310 100644 --- a/numpy/lib/format.py +++ b/numpy/lib/format.py @@ -314,21 +314,19 @@ def _write_array_header(fp, d, version=None): header = header + ' '*topad + '\n' header = asbytes(_filter_header(header)) - if len(header) >= (256*256) and version == (1, 0): - raise ValueError("header does not fit inside %s bytes required by the" - " 1.0 format" % (256*256)) - if len(header) < (256*256): - header_len_str = struct.pack('<H', len(header)) + hlen = len(header) + if hlen < 256*256 and version in (None, (1, 0)): version = (1, 0) - elif len(header) < (2**32): - header_len_str = struct.pack('<I', len(header)) + header_prefix = magic(1, 0) + struct.pack('<H', hlen) + elif hlen < 2**32 and version in (None, (2, 0)): version = (2, 0) + header_prefix = magic(2, 0) + struct.pack('<I', hlen) else: - raise ValueError("header does not fit inside 4 GiB required by " - "the 2.0 format") + msg = "Header length %s too big for version=%s" + msg %= (hlen, version) + raise ValueError(msg) - fp.write(magic(*version)) - fp.write(header_len_str) + fp.write(header_prefix) fp.write(header) return version |