[v4,16/16] t/helper: don't depend on implicit wraparound

Commit Message

Patrick Steinhardt Dec. 6, 2024, 10:27 a.m. UTC

In our test helpers we have two cases where we assign -1 to an `unsigned
long`. The intent is to essentially mean "unbounded output", which is
achieved via implicit wraparound of the value.

This pattern causes warnings with -Wsign-compare though. Adapt it and
instead use `ULONG_MAX` explicitly.

Signed-off-by: Patrick Steinhardt <[e-mail]>
---
 t/helper/test-csprng.c    | 5 +----
 t/helper/test-genrandom.c | 4 +---
 2 files changed, 2 insertions(+), 7 deletions(-)

Patch

diff --git a/t/helper/test-csprng.c b/t/helper/test-csprng.c
index ea9b9b656307d32bdc1f2e15a91793b1dda9c463..a4a0aca61773b0b30de618955e5a5b61bba2d0cc 100644
--- a/t/helper/test-csprng.c
+++ b/t/helper/test-csprng.c
@@ -1,9 +1,6 @@ 
-#define DISABLE_SIGN_COMPARE_WARNINGS
-
 #include "test-tool.h"
 #include "git-compat-util.h"
 
-
 int cmd__csprng(int argc, const char **argv)
 {
 	unsigned long count;
@@ -14,7 +11,7 @@  int cmd__csprng(int argc, const char **argv)
 		return 2;
 	}
 
-	count = (argc == 2) ? strtoul(argv[1], NULL, 0) : -1L;
+	count = (argc == 2) ? strtoul(argv[1], NULL, 0) : ULONG_MAX;
 
 	while (count) {
 		unsigned long chunk = count < sizeof(buf) ? count : sizeof(buf);
diff --git a/t/helper/test-genrandom.c b/t/helper/test-genrandom.c
index 5b51e6648d8e698b09f400efcf67a0708c226e9d..51b67f2f87469471a40288e369d9c784eb2ccba0 100644
--- a/t/helper/test-genrandom.c
+++ b/t/helper/test-genrandom.c
@@ -4,8 +4,6 @@ 
  * Copyright (C) 2007 by Nicolas Pitre, licensed under the GPL version 2.
  */
 
-#define DISABLE_SIGN_COMPARE_WARNINGS
-
 #include "test-tool.h"
 #include "git-compat-util.h"
 
@@ -24,7 +22,7 @@  int cmd__genrandom(int argc, const char **argv)
 		next = next * 11 + *c;
 	} while (*c++);
 
-	count = (argc == 3) ? strtoul(argv[2], NULL, 0) : -1L;
+	count = (argc == 3) ? strtoul(argv[2], NULL, 0) : ULONG_MAX;
 
 	while (count--) {
 		next = next * 1103515245 + 12345;