1 files changed, 118 insertions, 0 deletions
diff --git a/usr/klibc/tests/testvsnp.c b/usr/klibc/tests/testvsnp.c
new file mode 100644
index 0000000..7120bda
--- /dev/null
+++ b/usr/klibc/tests/testvsnp.c
@@ -0,0 +1,118 @@
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+int main(void)
+{
+	int r, i;
+	char buffer[512];
+
+	r = snprintf(buffer, 512, "Hello, %d", 37);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'d", 37373737);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'x", 0xdeadbeef);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#X", 0xdeadbeef);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#llo", 0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	/* Make sure overflow works correctly */
+	memset(buffer, '\xff', 512);
+	r = snprintf(buffer, 16, "Hello, %'#llo", 0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+	for (i = 16; i < 512; i++)
+		assert(buffer[i] == '\xff');
+
+	r = snprintf(buffer, 512, "Hello, %'#40.20llo", 0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#-40.20llo", 0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#*.*llo", 40, 20,
+		     0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#*.*llo", -40, 20,
+		     0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#*.*llo", -40, -20,
+		     0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %'#*.*llx", -40, -20,
+		     0123456701234567ULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %p", &buffer);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %P", &buffer);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %20p", &buffer);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %-20p", &buffer);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 512, "Hello, %-20p", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 20, "Hello, %'-20p", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 15, "Hello, %'-20p", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 3, "Hello, %'-20p", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	/* This shouldn't change buffer in any way! */
+	r = snprintf(buffer, 0, "Hello, %'-20p", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	for (i = -30; i <= 30; i++) {
+		r = snprintf(buffer, 40, "Hello, %'*p", i, NULL);
+		printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer),
+		       r);
+	}
+
+	r = snprintf(buffer, 40, "Hello, %'-20s", "String");
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'20s", "String");
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'020s", "String");
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'-20s", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'20s", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'020s", NULL);
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'-20c", '*');
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'20c", '*');
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	r = snprintf(buffer, 40, "Hello, %'020c", '*');
+	printf("buffer = \"%s\" (%d), r = %d\n", buffer, strlen(buffer), r);
+
+	return 0;
+}