pack-bitmap: extract read_bitmap()
function
The pack-bitmap machinery uses the `read_bitmap_1()` function to read a bitmap from within the mmap'd region corresponding to the .bitmap file. As as side-effect of calling this function, `read_bitmap_1()` increments the `index->map_pos` variable to reflect the number of bytes read. Extract the core of this routine to a separate function (that operates over a `const unsigned char *`, a `size_t` and a `size_t *` pointer) instead of a `struct bitmap_index *` pointer. This function (called `read_bitmap()`) is part of the pack-bitmap.h API so that it can be used within the upcoming portion of the implementation in pseduo-merge.ch. Rewrite the existing function, `read_bitmap_1()`, in terms of its more generic counterpart. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Junio C Hamano

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79621f3e41
@ -160,4 +160,6 @@ int bitmap_is_preferred_refname(struct repository *r, const char *refname);
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int verify_bitmap_files(struct repository *r);
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struct ewah_bitmap *read_bitmap(const unsigned char *map,
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size_t map_size, size_t *map_pos);
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#endif
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