/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsCRT.h"

#include "nsString.h"

#include "plstr.h"

#include <stdlib.h>

#include "gtest/gtest.h"

namespace TestCRT {

// The return from strcmp etc is only defined to be postive, zero or

// negative. The magnitude of a non-zero return is irrelevant.

int sign(int val) {

  if (val == 0) {

    return 0;

  } else {

    if (val > 0) {

      return 1;

    } else {

      return -1;

    }

  }

}

// Verify that nsCRT versions of string comparison routines get the

// same answers as the native non-unicode versions. We only pass in

// iso-latin-1 strings, so the comparison must be valid.

static void Check(const char* s1, const char* s2, size_t n)

{

  bool longerThanN = strlen(s1) > n || strlen(s2) > n;

  int clib = PL_strcmp(s1, s2);

  int clib_n = PL_strncmp(s1, s2, n);

  if (!longerThanN) {

    EXPECT_EQ(sign(clib), sign(clib_n));

  }

  nsAutoString t1,t2;

  CopyASCIItoUTF16(mozilla::MakeStringSpan(s1), t1);

  CopyASCIItoUTF16(mozilla::MakeStringSpan(s2), t2);

  const char16_t* us1 = t1.get();

  const char16_t* us2 = t2.get();

  int u2, u2_n;

  u2 = nsCRT::strcmp(us1, us2);

  EXPECT_EQ(sign(clib), sign(u2));

  u2 = NS_strcmp(us1, us2);

  u2_n = NS_strncmp(us1, us2, n);

  EXPECT_EQ(sign(clib), sign(u2));

  EXPECT_EQ(sign(clib_n), sign(u2_n));

}

struct Test {

  const char* s1;

  const char* s2;

  size_t n;

};

static Test tests[] = {

  { "foo", "foo", 3 },

  { "foo", "fo", 3 },

  { "foo", "bar", 3 },

  { "foo", "ba", 3 },

  { "foo", "zap", 3 },

  { "foo", "za", 3 },

  { "bar", "foo", 3 },

  { "bar", "fo", 3 },

  { "bar", "foo", 3 },

  { "bar", "fo", 3 },

  { "foo", "foobar", 3 },

  { "foobar", "foo", 3 },

  { "foobar", "foozap", 3 },

  { "foozap", "foobar", 3 },

};

#define NUM_TESTS int((sizeof(tests) / sizeof(tests[0])))

TEST(CRT, main)

{

  TestCRT::Test* tp = tests;

  for (int i = 0; i < NUM_TESTS; i++, tp++) {

    Check(tp->s1, tp->s2, tp->n);

  }

}

} // namespace TestCRT