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tools/nolibc: handle intmax_t/uintmax_t in printf

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In nolibc intmax_t and uintmax_t are always the same as
(unsigned) long long/uint64_t as 128bit numbers are not supported.
Even libcs that do support 128bit numbers often fix intmax_t to 64bit
as it is used in ABIs and any change would break those.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Thomas Weißschuh
2025-04-22 10:56:23 +02:00
committed by Thomas Weißschuh
parent 6d1724ec86
commit 4c99fbc6a0
2 changed files with 4 additions and 0 deletions
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tools/include/nolibc/stdio.h
+2
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@@ -286,6 +286,8 @@ int vfprintf(FILE *stream, const char *fmt, va_list args)
if (c == 'l') {
/* long format prefix, maintain the escape */
lpref++;
} else if (c == 'j') {
lpref = 2;
}
escape = 1;
goto do_escape;
tools/testing/selftests/nolibc/nolibc-test.c
+2
View File
@@ -1429,6 +1429,8 @@ static int run_vfprintf(int min, int max)
CASE_TEST(char); EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
CASE_TEST(hex); EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
CASE_TEST(pointer); EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
CASE_TEST(uintmax_t); EXPECT_VFPRINTF(20, "18446744073709551615", "%ju", 0xffffffffffffffffULL); break;
CASE_TEST(intmax_t); EXPECT_VFPRINTF(20, "-9223372036854775807", "%jd", 0x8000000000000001LL); break;
CASE_TEST(scanf); EXPECT_ZR(1, test_scanf()); break;
case __LINE__:
return ret; /* must be last */