From 42c78a216e751cfa2720c8276c9e9f2b81640e6b Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Sat, 8 Jul 2017 12:35:35 +0200
Subject: [PATCH] use DIV_ROUND_UP
Convert code that divides and rounds up to use DIV_ROUND_UP to make the
intent clearer and reduce the number of magic constants.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin/gc.c | 2 +-
builtin/grep.c | 2 +-
builtin/log.c | 2 +-
builtin/receive-pack.c | 2 +-
diff.c | 2 +-
ewah/ewah_bitmap.c | 4 ++--
imap-send.c | 2 +-
sha1_name.c | 5 ++---
shallow.c | 8 ++++----
9 files changed, 14 insertions(+), 15 deletions(-)
diff --git a/builtin/gc.c b/builtin/gc.c
index 91f7696a85..0477c2451f 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -148,7 +148,7 @@ static int too_many_loose_objects(void)
if (!dir)
return 0;
- auto_threshold = (gc_auto_threshold + 255) / 256;
+ auto_threshold = DIV_ROUND_UP(gc_auto_threshold, 256);
while ((ent = readdir(dir)) != NULL) {
if (strspn(ent->d_name, "0123456789abcdef") != 38 ||
ent->d_name[38] != '\0')
diff --git a/builtin/grep.c b/builtin/grep.c
index 254c1c7849..dc001da562 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -524,7 +524,7 @@ static void compile_submodule_options(const struct grep_opt *opt,
* submodule process has its own thread pool.
*/
argv_array_pushf(&submodule_options, "--threads=%d",
- (num_threads + 1) / 2);
+ DIV_ROUND_UP(num_threads, 2));
/* Add Pathspecs */
argv_array_push(&submodule_options, "--");
diff --git a/builtin/log.c b/builtin/log.c
index 57ce470f50..96c050b450 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1302,7 +1302,7 @@ static struct commit *get_base_commit(const char *base_commit,
if (rev_nr % 2)
rev[i] = rev[2 * i];
- rev_nr = (rev_nr + 1) / 2;
+ rev_nr = DIV_ROUND_UP(rev_nr, 2);
}
if (!in_merge_bases(base, rev[0]))
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index da9a3a2c9d..90d58c2fed 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1805,7 +1805,7 @@ static const char *unpack_with_sideband(struct shallow_info *si)
static void prepare_shallow_update(struct command *commands,
struct shallow_info *si)
{
- int i, j, k, bitmap_size = (si->ref->nr + 31) / 32;
+ int i, j, k, bitmap_size = DIV_ROUND_UP(si->ref->nr, 32);
ALLOC_ARRAY(si->used_shallow, si->shallow->nr);
assign_shallow_commits_to_refs(si, si->used_shallow, NULL);
diff --git a/diff.c b/diff.c
index 74283d9001..63ff66bf6d 100644
--- a/diff.c
+++ b/diff.c
@@ -2095,7 +2095,7 @@ static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *o
* bytes per "line".
* This is stupid and ugly, but very cheap...
*/
- damage = (damage + 63) / 64;
+ damage = DIV_ROUND_UP(damage, 64);
ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
dir.files[dir.nr].name = file->name;
dir.files[dir.nr].changed = damage;
diff --git a/ewah/ewah_bitmap.c b/ewah/ewah_bitmap.c
index 2dc9c82ecf..06c479f70a 100644
--- a/ewah/ewah_bitmap.c
+++ b/ewah/ewah_bitmap.c
@@ -210,8 +210,8 @@ size_t ewah_add(struct ewah_bitmap *self, eword_t word)
void ewah_set(struct ewah_bitmap *self, size_t i)
{
const size_t dist =
- (i + BITS_IN_EWORD) / BITS_IN_EWORD -
- (self->bit_size + BITS_IN_EWORD - 1) / BITS_IN_EWORD;
+ DIV_ROUND_UP(i + 1, BITS_IN_EWORD) -
+ DIV_ROUND_UP(self->bit_size, BITS_IN_EWORD);
assert(i >= self->bit_size);
diff --git a/imap-send.c b/imap-send.c
index 857591660f..37388f142d 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -861,7 +861,7 @@ static char hexchar(unsigned int b)
return b < 10 ? '0' + b : 'a' + (b - 10);
}
-#define ENCODED_SIZE(n) (4*((n+2)/3))
+#define ENCODED_SIZE(n) (4 * DIV_ROUND_UP((n), 3))
static char *cram(const char *challenge_64, const char *user, const char *pass)
{
int i, resp_len, encoded_len, decoded_len;
diff --git a/sha1_name.c b/sha1_name.c
index 5e2ec37b65..f7b6242914 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -479,10 +479,9 @@ int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len)
* We now know we have on the order of 2^len objects, which
* expects a collision at 2^(len/2). But we also care about hex
* chars, not bits, and there are 4 bits per hex. So all
- * together we need to divide by 2; but we also want to round
- * odd numbers up, hence adding one before dividing.
+ * together we need to divide by 2 and round up.
*/
- len = (len + 1) / 2;
+ len = DIV_ROUND_UP(len, 2);
/*
* For very small repos, we stick with our regular fallback.
*/
diff --git a/shallow.c b/shallow.c
index f9370961f9..1aee070c4d 100644
--- a/shallow.c
+++ b/shallow.c
@@ -443,7 +443,7 @@ struct paint_info {
static uint32_t *paint_alloc(struct paint_info *info)
{
- unsigned nr = (info->nr_bits + 31) / 32;
+ unsigned nr = DIV_ROUND_UP(info->nr_bits, 32);
unsigned size = nr * sizeof(uint32_t);
void *p;
if (!info->pool_count || size > info->end - info->free) {
@@ -471,7 +471,7 @@ static void paint_down(struct paint_info *info, const unsigned char *sha1,
{
unsigned int i, nr;
struct commit_list *head = NULL;
- int bitmap_nr = (info->nr_bits + 31) / 32;
+ int bitmap_nr = DIV_ROUND_UP(info->nr_bits, 32);
size_t bitmap_size = st_mult(sizeof(uint32_t), bitmap_nr);
struct commit *c = lookup_commit_reference_gently(sha1, 1);
uint32_t *tmp; /* to be freed before return */
@@ -611,7 +611,7 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
paint_down(&pi, ref->oid[i].hash, i);
if (used) {
- int bitmap_size = ((pi.nr_bits + 31) / 32) * sizeof(uint32_t);
+ int bitmap_size = DIV_ROUND_UP(pi.nr_bits, 32) * sizeof(uint32_t);
memset(used, 0, sizeof(*used) * info->shallow->nr);
for (i = 0; i < nr_shallow; i++) {
const struct commit *c = lookup_commit(oid[shallow[i]].hash);
@@ -672,7 +672,7 @@ static void post_assign_shallow(struct shallow_info *info,
struct commit *c;
uint32_t **bitmap;
int dst, i, j;
- int bitmap_nr = (info->ref->nr + 31) / 32;
+ int bitmap_nr = DIV_ROUND_UP(info->ref->nr, 32);
struct commit_array ca;
trace_printf_key(&trace_shallow, "shallow: post_assign_shallow\n");
--
2.48.1