1 files changed, 90 insertions, 0 deletions
diff --git a/sscanf.c b/sscanf.c
new file mode 100644
index 0000000..a692b50
--- /dev/null
+++ b/sscanf.c
@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+
+#define TEST(r, f, x, m) ( \
+((r) = (f)) == (x) || \
+(printf(__FILE__ ":%d: %s failed (" m ")\n", __LINE__, #f, r, x), err++, 0) )
+
+#define TEST_S(s, x, m) ( \
+!strcmp((s),(x)) || \
+(printf(__FILE__ ":%d: [%s] != [%s] (%s)\n", __LINE__, s, x, m), err++, 0) )
+
+#define TEST_F(x) ( \
+TEST(i, sscanf(# x, "%lf", &d), 1, "got %d fields, expected %d"), \
+TEST(t, d, (double)x, "%g != %g") )
+
+int test_sscanf(void)
+{
+	int i;
+	int err=0;
+	char a[100], b[100], *s;
+	int x, y, z, u, v;
+	double d, t;
+	long lo[10];
+
+	TEST(i, sscanf("hello, world\n", "%s %s", a, b), 2, "only %d fields, expected %d");
+	TEST_S(a, "hello,", "");
+	TEST_S(b, "world", "");
+
+	TEST(i, sscanf("hello, world\n", "%[hel]%s", a, b), 2, "only %d fields, expected %d");
+	TEST_S(a, "hell", "");
+	TEST_S(b, "o,", "");
+
+	TEST(i, sscanf("hello, world\n", "%[hel] %s", a, b), 2, "only %d fields, expected %d");
+	TEST_S(a, "hell", "");
+	TEST_S(b, "o,", "");
+
+	a[8] = 'X';
+	a[9] = 0;
+	TEST(i, sscanf("hello, world\n", "%8c%8c", a, b), 1, "%d fields, expected %d");
+	TEST_S(a, "hello, wX", "");
+
+	TEST(i, sscanf("56789 0123 56a72", "%2d%d%*d %[0123456789]\n", &x, &y, a), 3, "only %d fields, expected %d");
+	TEST(i, x, 56, "%d != %d");
+	TEST(i, y, 789, "%d != %d");
+	TEST_S(a, "56", "");
+
+	TEST(i, sscanf("011 0x100 11 0x100 100", "%i %i %o %x %x\n", &x, &y, &z, &u, &v), 5, "only %d fields, expected %d");
+	TEST(i, x, 9, "%d != %d");
+	TEST(i, y, 256, "%d != %d");
+	TEST(i, z, 9, "%d != %d");
+	TEST(i, u, 256, "%d != %d");
+	TEST(i, v, 256, "%d != %d");
+
+	TEST(i, sscanf("20 xyz", "%d %d\n", &x, &y), 1, "only %d fields, expected %d");
+	TEST(i, x, 20, "%d != %d");
+
+	TEST(i, sscanf("xyz", "%d\n", &x, &y), 0, "got %d fields, expected no match (%d)");
+
+	TEST(i, sscanf("", "%d\n", &x, &y), -1, "got %d fields, expected input failure (%d)");
+
+	TEST(i, sscanf(" 12345 6", "%2d%d%d", &x, &y, &z), 3, "only %d fields, expected %d");
+	TEST(i, x, 12, "%d != %d");
+	TEST(i, y, 345, "%d != %d");
+	TEST(i, z, 6, "%d != %d");
+
+	TEST(i, sscanf(" 0x12 0x34", "%5i%2i", &x, &y), 1, "got %d fields, expected %d");
+	TEST(i, x, 0x12, "%d != %d");
+
+	TEST_F(123);
+	TEST_F(123.0);
+	TEST_F(123.0e+0);
+	TEST_F(123.0e+4);
+	TEST_F(1.234e1234);
+	TEST_F(1.234e-1234);
+	TEST_F(1.234e56789);
+	TEST_F(1.234e-56789);
+	TEST_F(-0.5);
+	TEST_F(0.1);
+	TEST_F(0.2);
+	TEST_F(0.1e-10);
+	TEST_F(0x1234p56);
+
+	TEST(i, sscanf("10e", "%lf", &d), 0, "got %d fields, expected no match (%d)");
+	TEST(i, sscanf("", "%lf\n", &d), -1, "got %d fields, expected input failure (%d)");
+
+
+	return err;
+}