t/packtests64.c

   1 /*
   2  * Copyright © 2015, 2023 Nick Bowler
   3  *
   4  * Test application to verify 64-bit signed unpacking functions.
   5  *
   6  * License WTFPL2: Do What The Fuck You Want To Public License, version 2.
   7  * This is free software: you are free to do what the fuck you want to.
   8  * There is NO WARRANTY, to the extent permitted by law.
   9  */
  10
  11 #include "pack.h"
  12 #include "tap.h"
  13
  14 static const unsigned char zero[8];
  15 static const unsigned char minus_one[8] = {
  16         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
  17 };
  18
  19 static const unsigned char min[9] = {
  20         0x80, 0, 0, 0, 0, 0, 0, 0, 0x80
  21 };
  22
  23 static const unsigned char test_pattern[8] = {
  24         0xde, 0xad, 0xbe, 0xef, 0xf0, 0x0d, 0xca, 0xfe
  25 };
  26
  27 #define test(func, pattern, expected) do { \
  28         long long result__ = (func)(pattern); \
  29         if (!tap_result(result__ == (expected), "%s(%s)", #func, #expected)) { \
  30                 tap_diag("  expected: %lld", (long long)(expected)); \
  31                 tap_diag("  actual:   %lld", result__); \
  32         } \
  33 } while (0)
  34
  35 int main(void)
  36 {
  37 #if PACK_HAVE_64BIT
  38         tap_plan(8);
  39
  40         test(unpack_s64_be, zero,          0);
  41         test(unpack_s64_be, minus_one,    -1);
  42         test(unpack_s64_be, test_pattern, -2401053088584709378ll);
  43         test(unpack_s64_be, min,          -9223372036854775807ll-1);
  44
  45         test(unpack_s64_le, zero,          0);
  46         test(unpack_s64_le, minus_one,    -1);
  47         test(unpack_s64_le, test_pattern, -87241914314740258ll);
  48         test(unpack_s64_le, min+1,        -9223372036854775807ll-1);
  49 #else
  50         tap_skip_all("no 64-bit support");
  51 #endif
  52
  53         tap_done();
  54 }