t_packable.cpp

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/*****************************************************************************\
*                                                                             *
*  Name   : test_packable                                                     *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1996-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include <basis/chaos.h>
#include <basis/function.h>
#include <basis/guards.h>
#include <basis/istring.h>
#include <basis/packable.h>
#include <mathematics/float_plus.h>
#include <opsystem/application_shell.h>
#include <data_struct/static_memory_gremlin.h>

#include <math.h>

using namespace basis;

HOOPLE_STARTUP_CODE;

#define DIE(group, message) \
  deadly_error("test_packable", group " test group", message)

#define TRY_ON(type, value, group) { \
  byte_array temp_array; \
  attach(temp_array, type(value)); \
  type output; \
/*log(istring(istring::SPRINTF, "parms are: type=%s value=%s group=%s", #type, #value, #group));*/ \
  if (!detach(temp_array, output)) \
    DIE(group, "couldn't unpack " #type); \
  if (output != type(value)) \
    DIE(group, #type " value didn't match " #value); \
  if (temp_array.length()) \
    DIE(group, #type " detach of " #value " had data left"); \
}

#define TRY_ON_OBSCURE(type, value, group) { \
  byte_array temp_array; \
  obscure_attach(temp_array, type(value)); \
  type output; \
/*log(istring(istring::SPRINTF, "parms are: type=%s value=%s group=%s", #type, #value, #group));*/ \
  if (!obscure_detach(temp_array, output)) \
    DIE(group, "couldn't obscure unpack " #type); \
  if (output != type(value)) \
    DIE(group, #type " value didn't obscure match " #value); \
  if (temp_array.length()) \
    DIE(group, #type " obscure detach of " #value " had data left"); \
}

#define TRY_ON_F(type, value, group) { \
  byte_array temp_array; \
  attach(temp_array, type(value)); \
  type output; \
/*log(istring(istring::SPRINTF, "parms are: type=%s value=%s group=%s", #type, #value, #group));*/ \
  if (!detach(temp_array, output)) \
    DIE(group, "couldn't unpack " #type); \
/*  float_plus<type> a(output); \
  float_plus<type> b(value); */ \
  /*double diff = maximum(output, value) - minimum(output, value);*/ \
  int exponent_1, exponent_2; \
  double mantissa_1 = frexp(output, &exponent_1); \
  double mantissa_2 = frexp(output, &exponent_2); \
  if ( (mantissa_1 != mantissa_2) || (exponent_1 != exponent_2) ) { \
    isprintf error_msg(#type " value didn't match " #value ", %f vs. %f", value, output); \
    DIE(group, error_msg); \
  } \
  if (temp_array.length()) \
    DIE(group, #type " detach of " #value " had data left"); \
}

class test_packable : public application_shell
{
public:
  test_packable() : application_shell("test_packable") {}
  ~test_packable() {}

  IMPLEMENT_CLASS_NAME("test_packable");

  int execute();
};


int test_packable::execute()
{
  {
    #define TEST "first"
    TRY_ON(int, 2383, TEST);
    TRY_ON(int, -18281, TEST);
    TRY_ON(long, 337628, TEST);
    TRY_ON(long, -987887, TEST);
    TRY_ON(short, 12983, TEST);
    TRY_ON(short, -32700, TEST);
    TRY_ON(u_int, 2988384, TEST);
    TRY_ON(u_int, 92982984, TEST);
    TRY_ON(u_long, 388745, TEST);
    TRY_ON(u_long, 993787, TEST);
    TRY_ON(u_short, 12983, TEST);
    TRY_ON(u_short, 48377, TEST);
    TRY_ON_OBSCURE(int, -23948377, TEST);
    TRY_ON_OBSCURE(int, 28938, TEST);
    #undef TEST
  }
  {
    #define TEST "second"
    TRY_ON(int, 0, TEST);
    TRY_ON(int, MAXINT, TEST);
    TRY_ON(int, MININT, TEST);
    TRY_ON(byte, 0, TEST);
    TRY_ON(byte, MAXBYTE, TEST);
    TRY_ON(byte, MINBYTE, TEST);
    TRY_ON(char, 0, TEST);
    TRY_ON(char, MAXCHAR, TEST);
    TRY_ON(char, MINCHAR, TEST);
    TRY_ON(long, 0, TEST);
    TRY_ON(long, MAXLONG, TEST);
    TRY_ON(long, MINLONG, TEST);
    TRY_ON(short, 0, TEST);
    TRY_ON(short, MAXSHORT, TEST);
    TRY_ON(short, MINSHORT, TEST);
    u_long max_u_long = MAXLONG | MINLONG;
    TRY_ON(u_int, 0, TEST);
    TRY_ON(u_int, max_u_long, TEST);
    TRY_ON(u_int, max_u_long - 1, TEST);
    TRY_ON(u_int, max_u_long - 2, TEST);
    TRY_ON(u_int, max_u_long - 3, TEST);
    TRY_ON(u_long, 0, TEST);
    TRY_ON(u_long, max_u_long, TEST);
    TRY_ON(u_long, max_u_long - 1, TEST);
    TRY_ON(u_long, max_u_long - 2, TEST);
    TRY_ON(u_long, max_u_long - 3, TEST);
    u_short max_u_short = MAXSHORT | MINSHORT;
    TRY_ON(u_short, 0, TEST);
    TRY_ON(u_short, max_u_short, TEST);
    TRY_ON(u_short, max_u_short - 1, TEST);
    TRY_ON(u_short, max_u_short - 2, TEST);
    TRY_ON(u_short, max_u_short - 3, TEST);
    #undef TEST
  }
  {
    #define TEST "third"
    // new bit for floating point packing.
    TRY_ON_F(double, 0.0, TEST);
    TRY_ON_F(double, 1.0, TEST);
    TRY_ON_F(double, -1.0, TEST);
    TRY_ON_F(double, 1.1, TEST);
    TRY_ON_F(double, -1.1, TEST);
    TRY_ON_F(double, 1983.293, TEST);
    TRY_ON_F(double, -1983.293, TEST);
    TRY_ON_F(double, 984.293e20, TEST);
    TRY_ON_F(double, -984.293e31, TEST);

    const int MAX_FLOAT_ITERS = 100000;
    int iters = 0;
    while (iters++ < MAX_FLOAT_ITERS) {
      double dividend = randomizer().inclusive(1, MAXINT / 2);
      double divisor = randomizer().inclusive(1, MAXINT / 2);
      double multiplier = randomizer().inclusive(1, MAXINT / 2);
      double rand_float = (dividend / divisor) * multiplier;
      if (randomizer().inclusive(0, 1) == 1)
        rand_float = -1.0 * rand_float;
      TRY_ON_F(double, rand_float, "third--loop");
//log(isprintf("%f", rand_float));
    }
    #undef TEST
  }

  {
    #define TEST "fourth"
    // new test for char * packing.
    const char *tunnel_vision = "plants can make good friends.";
    const char *fresnel_lense = "chimney sweeps carry some soot.";
    const char *snoopy = "small white dog with black spots.";
    byte_array stored;
    int fregose = 38861;
    double perky_doodle = 3799.283e10;
    const char *emptyish = "";
    int jumboat = 998;
    // now stuff the array with some things.
    attach(stored, fregose);
    attach(stored, tunnel_vision);
    attach(stored, snoopy);
    attach(stored, perky_doodle);
    attach(stored, fresnel_lense);
    attach(stored, emptyish);
    attach(stored, jumboat);
    // time to restore those contents.
    istring tunnel_copy;
    istring fresnel_copy;
    istring snoopy_copy;
    int freg_copy;
    double perk_copy;
    istring emp_copy;
    int jum_copy;
    if (!detach(stored, freg_copy))
      DIE(TEST, "first int failed to unpack");
    if (!detach(stored, tunnel_copy))
      DIE(TEST, "first string failed to unpack");
    if (!detach(stored, snoopy_copy))
      DIE(TEST, "second string failed to unpack");
    if (!detach(stored, perk_copy))
      DIE(TEST, "first double failed to unpack");
    if (!detach(stored, fresnel_copy))
      DIE(TEST, "third string failed to unpack");
    if (!detach(stored, emp_copy))
      DIE(TEST, "fourth string failed to unpack");
    if (!detach(stored, jum_copy))
      DIE(TEST, "second int failed to unpack");
    // now test contents.
    if (freg_copy != fregose)
      DIE(TEST, "first int had wrong contents");
    if (tunnel_copy != tunnel_vision)
      DIE(TEST, "first string had wrong contents");
    if (snoopy_copy != snoopy)
      DIE(TEST, "second string had wrong contents");
    if (perk_copy != perky_doodle)
      DIE(TEST, "first double had wrong contents");
    if (fresnel_copy != fresnel_lense)
      DIE(TEST, "third string had wrong contents");
    if (emp_copy != emptyish)
      DIE(TEST, "fourth string had wrong contents");
    if (jum_copy != jumboat)
      DIE(TEST, "second int had wrong contents");
    if (stored.length())
      DIE(TEST, "array still had contents after detaching");
    

    #undef TEST
  }

  guards::alert_message("packable:: works for those functions tested.");
  return 0;
}


int main(int formal(argc), char *formal(argv)[])
{
  test_packable root_program;
  return root_program.execute();
}

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