/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/testlib/testlib.h"

TEST(strtoimax, testZero) {
  EXPECT_EQ(0, strtoimax("0", NULL, 0));
}

TEST(strtoimax, testDecimal) {
  EXPECT_EQ(-123, strtoimax("-123", NULL, 0));
}

TEST(strtoimax, testHex) {
  EXPECT_EQ(-255, strtoimax("-0xff", NULL, 0));
  EXPECT_EQ(255, strtoimax("0xff", NULL, 16));
}

TEST(strtoimax, testOctal) {
  EXPECT_EQ(-123, strtoimax("-0173", NULL, 0));
  EXPECT_EQ(123, strtoimax("0173", NULL, 8));
}

TEST(strtoimax, testBinary) {
  EXPECT_EQ(-42, strtoimax("-0b101010", NULL, 0));
  EXPECT_EQ(42, strtoimax("0b101010", NULL, 2));
}

TEST(strtoimax, testLimits) {
  EXPECT_EQ(
      ((uintmax_t)0xffffffffffffffff) << 64 | (uintmax_t)0xffffffffffffffff,
      strtoimax("-1", NULL, 0));
  EXPECT_EQ(
      ((uintmax_t)0x7fffffffffffffff) << 64 | (uintmax_t)0xffffffffffffffff,
      strtoimax("0x7fffffffffffffffffffffffffffffff", NULL, 0));
}

TEST(strtoimax, testOutsideLimit) {
  errno = 0;
  EXPECT_EQ(
      ((uintmax_t)0x7fffffffffffffff) << 64 | (uintmax_t)0xffffffffffffffff,
      strtoimax("0x80000000000000000000000000000000", NULL, 0));
  EXPECT_EQ(ERANGE, errno);
  errno = 0;
  EXPECT_EQ(((uintmax_t)0x8000000000000000) << 64 | 0x0000000000000000,
            strtoimax("-0x80000000000000000000000000000001", NULL, 0));
  EXPECT_EQ(ERANGE, errno);
}

TEST(strtoul, neghex) {
  errno = 0;
  ASSERT_EQ(-16, (long)strtoul("0xfffffffffffffff0", NULL, 0));
  EXPECT_EQ(0, errno);
}

TEST(strtol, testOutsideLimit) {
  errno = 0;
  EXPECT_EQ(0x7fffffffffffffff, strtol("0x8000000000000000", NULL, 0));
  EXPECT_EQ(ERANGE, errno);
  errno = 0;
  EXPECT_EQ(0x8000000000000000, strtol("-0x8000000000000001", NULL, 0));
  EXPECT_EQ(ERANGE, errno);
  errno = 0;
  EXPECT_EQ(0x8000000000000001, strtol("-9223372036854775807", NULL, 0));
  EXPECT_EQ(0, errno);
  errno = 0;
  EXPECT_EQ(0x8000000000000000, strtol("-9223372036854775808", NULL, 0));
  EXPECT_EQ(0, errno);
}
