sshpeer: make pipe polling code more explicit
"hasbuffer" is a property on our special bufferedinputpipe class.
When reading this code, I thought it might have had something
special to do properties on built-in types. But "hasbuffer" doesn't
appear in the CPython code base for either 2.7 or 3.7, so the
answer is no.
Let's make the code more explicit about the fact that it deals with
our special bufferedinputpipe type.
Differential Revision: https://phab.mercurial-scm.org/D2382
/*
* bdiff.cc - fuzzer harness for bdiff.c
*
* Copyright 2018, Google Inc.
*
* This software may be used and distributed according to the terms of
* the GNU General Public License, incorporated herein by reference.
*/
#include <stdlib.h>
extern "C" {
#include "bdiff.h"
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
if (!Size) {
return 0;
}
// figure out a random point in [0, Size] to split our input.
size_t split = Data[0] / 255.0 * Size;
// left input to diff is data[1:split]
const uint8_t *left = Data + 1;
// which has len split-1
size_t left_size = split - 1;
// right starts at the next byte after left ends
const uint8_t *right = left + left_size;
size_t right_size = Size - split;
struct bdiff_line *a, *b;
int an = bdiff_splitlines((const char *)left, split - 1, &a);
int bn = bdiff_splitlines((const char *)right, right_size, &b);
struct bdiff_hunk l;
bdiff_diff(a, an, b, bn, &l);
free(a);
free(b);
bdiff_freehunks(l.next);
return 0; // Non-zero return values are reserved for future use.
}
#ifdef HG_FUZZER_INCLUDE_MAIN
int main(int argc, char **argv)
{
const char data[] = "asdf";
return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);
}
#endif
} // extern "C"