On Sun, Jan 27, 2019 at 11:41:22AM -0800, sxe...@google.com wrote:
> From: Stefan Xenos <sxe...@gmail.com>
>
> Implement a "readonly_contains" function for oid_array that won't
> sort the array if it is unsorted. This can be used to test containment in
> the rare situations where the array order matters.
>
> The function has intentionally been given a name that is more cumbersome
> than the "lookup" function, which is what most callers will will want
> in most situations.
>
> Signed-off-by: Stefan Xenos <sxe...@google.com>
> ---
> sha1-array.c | 15 +++++++++++++++
> sha1-array.h | 2 ++
> t/helper/test-sha1-array.c | 6 ++++++
> t/t0064-sha1-array.sh | 22 ++++++++++++++++++++++
> 4 files changed, 45 insertions(+)
>
> diff --git a/sha1-array.c b/sha1-array.c
> index b94e0ec0f5..071fce7e90 100644
> --- a/sha1-array.c
> +++ b/sha1-array.c
> @@ -26,6 +26,21 @@ static const unsigned char *sha1_access(size_t index, void
> *table)
> return array[index].hash;
> }
>
> +int oid_array_readonly_contains(const struct oid_array* array,
> + const struct object_id* oid)
> +{
> + int i;
> + if (array->sorted) {
> + return sha1_pos(oid->hash, array->oid, array->nr, sha1_access)
> >= 0;
> + }
Style nit: unnecessary braces. According to CodingGuidelines we tend
not to use braces when the body of a loop or if statement is only a
single line.
> + for (i = 0; i < array->nr; i++) {
> + if (hashcmp(array->oid[i].hash, oid->hash) == 0) {
Please use oideq() instead.
> + return 1;
> + }
> + }
> + return 0;
> +}
> +
> int oid_array_lookup(struct oid_array *array, const struct object_id *oid)
> {
> if (!array->sorted)
> diff --git a/t/t0064-sha1-array.sh b/t/t0064-sha1-array.sh
> index 5dda570b9a..c1bac6fcdd 100755
> --- a/t/t0064-sha1-array.sh
> +++ b/t/t0064-sha1-array.sh
> @@ -32,6 +32,28 @@ test_expect_success 'ordered enumeration with duplicate
> suppression' '
> test_cmp expect actual
> '
>
> +test_expect_success 'readonly_contains finds existing' '
> + echo 1 > expect &&
> + echoid "" 88 44 aa 55 >> expect &&
Style nit: not space between redirection operator and filename.
> + {
> + echoid append 88 44 aa 55 &&
> + echoid readonly_contains 55 &&
> + echo for_each
> + } | test-tool sha1-array >actual &&
> + test_cmp expect actual
> +'
> +
> +test_expect_success 'readonly_contains non-existing query' '
> + echo 0 > expect &&
> + echoid "" 88 44 aa 55 >> expect &&
> + {
> + echoid append 88 44 aa 55 &&
> + echoid readonly_contains 33 &&
> + echo for_each
> + } | test-tool sha1-array >actual &&
> + test_cmp expect actual
> +'
> +
> test_expect_success 'lookup' '
> {
> echoid append 88 44 aa 55 &&
> --
> 2.20.1.495.gaa96b0ce6b-goog
>
