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string-util: allow taking SIZE_MAX as size to shorten to

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This is useful for two reasons:

1. it addresses a potential overflow in a graceful way

2. Gives callers the ability to just pass SIZE_MAX for a NOP

Prompted by: #31341
This commit is contained in:
Lennart Poettering
2024-03-06 13:24:15 +00:00
committed by Luca Boccassi
parent 10d50d9eac
commit d49dc7bbe7
2 changed files with 8 additions and 0 deletions
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src/test/test-string-util.c
+5
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@@ -299,8 +299,13 @@ TEST(ascii_strlower) {
TEST(strshorten) {
char s[] = "foobar";
assert_se(strlen(strshorten(s, SIZE_MAX)) == 6);
assert_se(strlen(strshorten(s, SIZE_MAX-1)) == 6);
assert_se(strlen(strshorten(s, SIZE_MAX-2)) == 6);
assert_se(strlen(strshorten(s, 6)) == 6);
assert_se(strlen(strshorten(s, 7)) == 6);
assert_se(strlen(strshorten(s, 12)) == 6);
assert_se(strlen(strshorten(s, 5)) == 5);
assert_se(strlen(strshorten(s, 2)) == 2);
assert_se(strlen(strshorten(s, 0)) == 0);
}