annotate mercurial/bdiff.h @ 48052:d07d38ef6362

dirstate: Appease pytype

test-check-pytype.t was failing since 98c0408324e6:

   File "/home/simon/projects/hg/mercurial/dirstatemap.py", line 572, in
   addfile: unsupported operand type(s) for &: 'size: None' and
   'rangemask: int' [unsupported-operands]
       No attribute '__and__' on 'size: None' or '__rand__' on 'rangemask: int'
   File "/home/simon/projects/hg/mercurial/dirstatemap.py", line 573, in
   addfile: unsupported operand type(s) for &: 'mtime: None' and
   'rangemask: int' [unsupported-operands]
       No attribute '__and__' on 'mtime: None' or '__rand__' on 'rangemask: int'

`None` is the default value of the `size` and `mtime` parameters of the
`addfile` method. However, the relevant lines are only used in a code path
where those defaults are never used. These `size` and `mtime` are passed
to `DirstateItem.new_normal` which (in the C implementation) calls
`dirstate_item_new_normal` which uses:

    PyArg_ParseTuple(args, "iii", &mode, &size, &mtime)

So `None` values would cause an exception to be raised anyway.
The new `assert`s only move that exception earlier, and informs pytype
that we expect `None` to never happen in this code path.

Differential Revision: https://phab.mercurial-scm.org/D11500

#ifndef _HG_BDIFF_H_
#define _HG_BDIFF_H_

#include "compat.h"

struct bdiff_line {
	int hash, n, e;
	ssize_t len;
	const char *l;
};

struct bdiff_hunk;
struct bdiff_hunk {
	int a1, a2, b1, b2;
	struct bdiff_hunk *next;
};

int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr);
int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn,
               struct bdiff_hunk *base);
void bdiff_freehunks(struct bdiff_hunk *l);

#endif