Function apply_binary_fragment

apply.c:3230–3268

}

static int apply_binary_fragment(struct apply_state *state,
				 struct image *img,
				 struct patch *patch)
{
	struct fragment *fragment = patch->fragments;
	size_t len;
	void *dst;

	if (!fragment)
		return error(_("missing binary patch data for '%s'"),
			     patch->new_name ?
			     patch->new_name :
			     patch->old_name);

	/* Binary patch is irreversible without the optional second hunk */
	if (state->apply_in_reverse) {
		if (!fragment->next)
			return error(_("cannot reverse-apply a binary patch "
				       "without the reverse hunk to '%s'"),
				     patch->new_name
				     ? patch->new_name : patch->old_name);
		fragment = fragment->next;
	}
	switch (fragment->binary_patch_method) {
	case BINARY_DELTA_DEFLATED:
		dst = patch_delta(img->buf.buf, img->buf.len, fragment->patch,
				  fragment->size, &len);
		if (!dst)
			return -1;
		image_clear(img);
		strbuf_attach(&img->buf, dst, len, len + 1);
		return 0;
	case BINARY_LITERAL_DEFLATED:
		image_clear(img);
		strbuf_add(&img->buf, fragment->patch, fragment->size);
		return 0;
	}
	return -1;
}

/*
 * Replace "img" with the result of applying the binary patch.