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[RFC PATCH 1/5] builtin/grep.c: change todo_* variables to unsigned

From
Rasmus Villemoes <rv@rasmusvillemoes.dk>
Date
Feb 12, 2019, 22:26 UTC
Message-ID
<20190212222654.7432-2-rv@rasmusvillemoes.dk>
In-Reply-To
<20190212222654.7432-1-rv@rasmusvillemoes.dk>

In preparation for subsequent patches that make todo_* free-running instead of reducing them mod TODO_SIZE, change their type to unsigned to avoid undefined behaviour in case anybody ever greps more than 2 billion files.

Signed-off-by: Rasmus Villemoes <rv@rasmusvillemoes.dk>
---
 builtin/grep.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/builtin/grep.c b/builtin/grep.c
index 580fd38f41..6c1e90d43b 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -58,9 +58,9 @@ struct work_item {
  */
 #define TODO_SIZE 128
 static struct work_item todo[TODO_SIZE];
-static int todo_start;
-static int todo_end;
-static int todo_done;
+static unsigned int todo_start;
+static unsigned int todo_end;
+static unsigned int todo_done;
 
 /* Has all work items been added? */
 static int all_work_added;
@@ -132,7 +132,7 @@ static struct work_item *get_work(void)
 
 static void work_done(struct work_item *w)
 {
-	int old_done;
+	unsigned int old_done;
 
 	grep_lock();
 	w->done = 1;
-- 
2.20.1
Previous: Rasmus VillemoesNext: Rasmus Villemoes
Message 2 of 6 in “builtin/grep.c: fix a tiny logic flaw”
  1. 0/5 builtin/grep.c: fix a tiny logic flawRasmus Villemoes, Feb 12, 2019
  2. 1/5 builtin/grep.c: change todo_* variables to unsignedRasmus Villemoes, Feb 12, 2019
  3. 2/5 builtin/grep.c: refactor loop in work_done() slightlyRasmus Villemoes, Feb 12, 2019
  4. 4/5 builtin/grep.c: add todo_item helperRasmus Villemoes, Feb 12, 2019
  5. 5/5 builtin/grep.c: fix fence-post error in add_work()Rasmus Villemoes, Feb 12, 2019
  6. 3/5 builtin/grep.c: add shorthand for &todo[todo_end] in add_work()Rasmus Villemoes, Feb 12, 2019

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