Skip to content

try decompress with unknown size, -buflen is guess size #89

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

try decompress with unknown size, -buflen is guess size #89

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 16 additions & 3 deletions lzomodule.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -329,9 +329,18 @@ decompress(PyObject *dummy, PyObject *args, PyObject *kwds)
goto header_error;
}
else {
if (buflen < 0) return PyErr_Format(LzoError, "Argument buflen required for headerless decompression");
out_len = buflen;
in_len = len;
if (buflen < 0){
if (-buflen > len){ // try decompress with unknown size, -buflen is guess size
out_len = -buflen;
in_len = len;
}else{
return PyErr_Format(LzoError, "Argument buflen required for headerless decompression");
}
}
else{
out_len = buflen;
in_len = len;
}
}

/* init for different algorithms*/
Expand Down Expand Up @@ -393,6 +402,10 @@ decompress(PyObject *dummy, PyObject *args, PyObject *kwds)
err = (*decompress_ptr)(in, in_len, out, &new_len, NULL);
Py_END_ALLOW_THREADS

if (buflen < 0 && new_len > 0){ // reutrn try it's best size
_PyString_Resize(&result_str, new_len);
return result_str;
}
if (err != LZO_E_OK || (header && new_len != out_len) )
{
Py_DECREF(result_str);
Expand Down