From a9baddd7d07b9fe15e212985a808a79773ec72e4 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 19 Mar 2011 22:26:06 -0400
Subject: initial check-in, taken from old libc svn repo with significant
 additions

---
 qsort.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 qsort.c

(limited to 'qsort.c')

diff --git a/qsort.c b/qsort.c
new file mode 100644
index 0000000..818426c
--- /dev/null
+++ b/qsort.c
@@ -0,0 +1,59 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+static int scmp(const void *a, const void *b)
+{
+	return strcmp(*(char **)a, *(char **)b);
+}
+
+static int icmp(const void *a, const void *b)
+{
+	return *(int*)a - *(int*)b;
+}
+
+#define FAIL(m) (printf(__FILE__ ":%d: %s failed\n", __LINE__, m), err++, 0)
+
+int test_qsort(void)
+{
+	int i;
+	int err=0;
+	/* 26 items -- even */
+	char *s[] = {
+		"Bob", "Alice", "John", "Ceres",
+		"Helga", "Drepper", "Emeralda", "Zoran",
+		"Momo", "Frank", "Pema", "Xavier",
+		"Yeva", "Gedun", "Irina", "Nono",
+		"Wiener", "Vincent", "Tsering", "Karnica",
+		"Lulu", "Quincy", "Osama", "Riley",
+		"Ursula", "Sam"
+	};
+	/* 23 items -- odd, prime */
+	int n[] = {
+		879045, 394, 99405644, 33434, 232323, 4334, 5454,
+		343, 45545, 454, 324, 22, 34344, 233, 45345, 343,
+		848405, 3434, 3434344, 3535, 93994, 2230404, 4334
+	};
+
+	qsort(s, sizeof(s)/sizeof(char *), sizeof(char *), scmp);
+	for (i=0; i<sizeof(s)/sizeof(char *)-1; i++) {
+		if (strcmp(s[i], s[i+1]) > 0) {
+			FAIL("string sort");
+			for (i=0; i<sizeof(s)/sizeof(char *); i++)
+				printf("\t%s\n", s[i]);
+			break;
+		}
+	}
+
+	qsort(n, sizeof(n)/sizeof(int), sizeof(int), icmp);
+	for (i=0; i<sizeof(n)/sizeof(int)-1; i++) {
+		if (n[i] > n[i+1]) {
+			FAIL("integer sort");
+			for (i=0; i<sizeof(n)/sizeof(int); i++)
+				printf("\t%d\n", n[i]);
+			break;
+		}
+	}
+
+	return err;
+}
-- 
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