/*
 * Check: a unit test framework for C
 * Copyright (C) 2001, 2002 Arien Malec
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "../lib/libcompat.h"

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <math.h>

#include "check.h"
#include "check_error.h"
#include "check_list.h"
#include "check_impl.h"
#include "check_msg.h"

#ifndef DEFAULT_TIMEOUT
#define DEFAULT_TIMEOUT 4
#endif

int check_major_version = CHECK_MAJOR_VERSION;
int check_minor_version = CHECK_MINOR_VERSION;
int check_micro_version = CHECK_MICRO_VERSION;

static int non_pass (int val);
static Fixture *fixture_create (SFun fun, int ischecked);
static void tcase_add_fixture (TCase *tc, SFun setup, SFun teardown,
			       int ischecked);
static void tr_init (TestResult *tr);
static void suite_free (Suite *s);
static void tcase_free (TCase *tc);

Suite *suite_create (const char *name)
{
  Suite *s;
  s = emalloc (sizeof(Suite)); /* freed in suite_free */
  if (name == NULL)
    s->name = "";
  else
    s->name = name;
  s->tclst = check_list_create();
  return s;
}

int suite_tcase (Suite *s, const char *tcname)
{
  List *l;
  TCase *tc;

  if (s == NULL)
    return 0;

  l = s->tclst;
  for (check_list_front (l); !check_list_at_end (l); check_list_advance (l)) {
    tc = check_list_val (l);
    if (strcmp (tcname, tc->name) == 0)
      return 1;
  }

  return 0;
}

static void suite_free (Suite *s)
{
  List *l;
  if (s == NULL)
    return;
  l = s->tclst;
  for (check_list_front(l); !check_list_at_end(l); check_list_advance (l)) {
    tcase_free (check_list_val(l));
  }
  check_list_free (s->tclst);
  free(s);
}

TCase *tcase_create (const char *name)
{
  char *env;
  double timeout_sec = DEFAULT_TIMEOUT;
  
  TCase *tc = emalloc (sizeof(TCase)); /*freed in tcase_free */
  if (name == NULL)
    tc->name = "";
  else
    tc->name = name;

  env = getenv("CK_DEFAULT_TIMEOUT");
  if (env != NULL) {
    char * endptr = NULL;
    double tmp = strtod(env, &endptr);
    if (tmp >= 0 && endptr != env && (*endptr) == '\0') {
      timeout_sec = tmp;
    }
  }

  env = getenv("CK_TIMEOUT_MULTIPLIER");
  if (env != NULL) {
    char * endptr = NULL;
    double tmp = strtod(env, &endptr);
    if (tmp >= 0 && endptr != env && (*endptr) == '\0') {
      timeout_sec = timeout_sec * tmp;
    }
  }  

  tc->timeout.tv_sec   = (time_t)floor(timeout_sec);
  tc->timeout.tv_nsec  = (long)((timeout_sec-floor(timeout_sec)) * (double)NANOS_PER_SECONDS);
  
  tc->tflst = check_list_create();
  tc->unch_sflst = check_list_create();
  tc->ch_sflst = check_list_create();
  tc->unch_tflst = check_list_create();
  tc->ch_tflst = check_list_create();

  return tc;
}


static void tcase_free (TCase *tc)
{
  check_list_apply (tc->tflst, free);
  check_list_apply (tc->unch_sflst, free);
  check_list_apply (tc->ch_sflst, free);
  check_list_apply (tc->unch_tflst, free);
  check_list_apply (tc->ch_tflst, free);
  check_list_free(tc->tflst);
  check_list_free(tc->unch_sflst);
  check_list_free(tc->ch_sflst);
  check_list_free(tc->unch_tflst);
  check_list_free(tc->ch_tflst);
  
  free(tc);
}

void suite_add_tcase (Suite *s, TCase *tc)
{
  if (s == NULL || tc == NULL)
    return;
  check_list_add_end (s->tclst, tc);
}

void _tcase_add_test (TCase *tc, TFun fn, const char *name, int _signal, int allowed_exit_value, int start, int end)
{
  TF * tf;
  if (tc == NULL || fn == NULL || name == NULL)
    return;
  tf = emalloc (sizeof(TF)); /* freed in tcase_free */
  tf->fn = fn;
  tf->loop_start = start;
  tf->loop_end = end;
  tf->signal = _signal; /* 0 means no signal expected */
  tf->allowed_exit_value = allowed_exit_value; /* 0 is default successful exit */
  tf->name = name;
  check_list_add_end (tc->tflst, tf);
}

static Fixture *fixture_create (SFun fun, int ischecked)
{
  Fixture *f;
  f = emalloc (sizeof(Fixture));
  f->fun = fun;
  f->ischecked = ischecked;

  return f;
}

void tcase_add_unchecked_fixture (TCase *tc, SFun setup, SFun teardown)
{
  tcase_add_fixture(tc,setup,teardown,0);
}

void tcase_add_checked_fixture (TCase *tc, SFun setup, SFun teardown)
{
#if defined(HAVE_FORK)
  tcase_add_fixture (tc,setup,teardown,1);
#else
  (void)tc;
  (void)setup;
  (void)teardown;
  eprintf("This version does not support checked fixtures, as fork is not supported", __FILE__, __LINE__);
#endif
}

static void tcase_add_fixture (TCase *tc, SFun setup, SFun teardown,
			       int ischecked)
{
  if (setup) {
    if (ischecked)
      check_list_add_end (tc->ch_sflst, fixture_create(setup, ischecked));
    else
      check_list_add_end (tc->unch_sflst, fixture_create(setup, ischecked));
  }

  /* Add teardowns at front so they are run in reverse order. */
  if (teardown) {
    if (ischecked)
      check_list_add_front (tc->ch_tflst, fixture_create(teardown, ischecked));
    else
      check_list_add_front (tc->unch_tflst, fixture_create(teardown, ischecked));  
  }
}

void tcase_set_timeout (TCase *tc, double timeout)
{
#if defined(HAVE_FORK)
  if (timeout >= 0) {
    char *env = getenv("CK_TIMEOUT_MULTIPLIER");
    if (env != NULL) {
      char * endptr = NULL;
      double tmp = strtod(env, &endptr);
      if (tmp >= 0 && endptr != env && (*endptr) == '\0') {
        timeout = timeout * tmp;
      }
    }
    
  tc->timeout.tv_sec   = (time_t)floor(timeout);
  tc->timeout.tv_nsec  = (long)((timeout-floor(timeout)) * (double)NANOS_PER_SECONDS);
  }
#else
  (void)tc;
  (void)timeout;
  eprintf("This version does not support timeouts, as fork is not supported", __FILE__, __LINE__);
#endif /* HAVE_FORK */
}

void tcase_fn_start (const char *fname CK_ATTRIBUTE_UNUSED, const char *file, int line)
{
  send_ctx_info (CK_CTX_TEST);
  send_loc_info (file, line);
}

void _mark_point (const char *file, int line)
{
  send_loc_info (file, line);
}

void _ck_assert_failed (const char *file,
                   int line, const char *expr, ...)
{
  const char *msg;
  va_list ap;
  char buf[BUFSIZ];

  send_loc_info (file, line);

  va_start(ap,expr);
  msg = (const char*)va_arg(ap, char *);
  if (msg == NULL)
    msg = expr;
  vsnprintf(buf, BUFSIZ, msg, ap);
  va_end(ap);
  send_failure_info (buf);
  if (cur_fork_status() == CK_FORK) {
  #if defined(HAVE_FORK) && HAVE_FORK==1
    exit(1);
  #endif /* HAVE_FORK */
  } else {
    longjmp(error_jmp_buffer, 1);
  }
}

SRunner *srunner_create (Suite *s)
{
  SRunner *sr = emalloc (sizeof(SRunner)); /* freed in srunner_free */
  sr->slst = check_list_create();
  if (s != NULL)
    check_list_add_end(sr->slst, s);
  sr->stats = emalloc (sizeof(TestStats)); /* freed in srunner_free */
  sr->stats->n_checked = sr->stats->n_failed = sr->stats->n_errors = 0;
  sr->resultlst = check_list_create();
  sr->log_fname = NULL;
  sr->xml_fname = NULL;
  sr->tap_fname = NULL;
  sr->loglst = NULL;

#if defined(HAVE_FORK)
  sr->fstat = CK_FORK_GETENV;
#else
  /*
   * Overriding the default of running tests in fork mode,
   * as this system does not have fork()
   */
  sr->fstat = CK_NOFORK;
#endif /* HAVE_FORK */

  return sr;
}

void srunner_add_suite (SRunner *sr, Suite *s)
{
  if (s == NULL)
    return;

  check_list_add_end(sr->slst, s);
}

void srunner_free (SRunner *sr)
{
  List *l;
  TestResult *tr;
  if (sr == NULL)
    return;
  
  free (sr->stats);
  l = sr->slst;
  for (check_list_front(l); !check_list_at_end(l); check_list_advance(l)) {
    suite_free(check_list_val(l));
  }
  check_list_free(sr->slst);

  l = sr->resultlst;
  for (check_list_front(l); !check_list_at_end(l); check_list_advance(l)) {
    tr = check_list_val(l);
    tr_free(tr);
  }
  check_list_free (sr->resultlst);

  free (sr);
}

int srunner_ntests_failed (SRunner *sr)
{
  return sr->stats->n_failed + sr->stats->n_errors;
}

int srunner_ntests_run (SRunner *sr)
{
  return sr->stats->n_checked;
}

TestResult **srunner_failures (SRunner *sr)
{
  int i = 0;
  TestResult **trarray;
  List *rlst;
  trarray = malloc (sizeof(trarray[0]) * srunner_ntests_failed (sr));

  rlst = sr->resultlst;
  for (check_list_front(rlst); !check_list_at_end(rlst); check_list_advance(rlst)) {
    TestResult *tr = check_list_val(rlst);
    if (non_pass(tr->rtype))
      trarray[i++] = tr;
    
  }
  return trarray;
}

TestResult **srunner_results (SRunner *sr)
{
  int i = 0;
  TestResult **trarray;
  List *rlst;

  trarray = malloc (sizeof(trarray[0]) * srunner_ntests_run (sr));

  rlst = sr->resultlst;
  for (check_list_front(rlst); !check_list_at_end(rlst); check_list_advance(rlst)) {
    trarray[i++] = check_list_val(rlst);
  }
  return trarray;
}

static int non_pass (int val)
{
  return val != CK_PASS;
}

TestResult *tr_create(void)
{
  TestResult *tr;

  tr = emalloc (sizeof(TestResult));
  tr_init (tr);
  return tr;
}

static void tr_init (TestResult *tr)
{
  tr->ctx = CK_CTX_INVALID;
  tr->line = -1;
  tr->rtype = CK_TEST_RESULT_INVALID;
  tr->msg = NULL;
  tr->file = NULL;
  tr->tcname = NULL;
  tr->tname = NULL;
  tr->duration = -1;
}

void tr_free(TestResult *tr)
{
  free(tr->file);
  free(tr->msg);
  free(tr);
}


const char *tr_msg (TestResult *tr)
{
  return tr->msg;
}

int tr_lno (TestResult *tr)
{
  return tr->line;
}

const char *tr_lfile (TestResult *tr)
{
  return tr->file;
}

int tr_rtype (TestResult *tr)
{
  return tr->rtype;
}

enum ck_result_ctx tr_ctx (TestResult *tr)
{
  return tr->ctx;
}

const char *tr_tcname (TestResult *tr)
{
  return tr->tcname;
}

static int _fstat = CK_FORK;

void set_fork_status (enum fork_status fstat)
{
  if (fstat == CK_FORK || fstat == CK_NOFORK || fstat == CK_FORK_GETENV)
    _fstat = fstat;
  else
    eprintf ("Bad status in set_fork_status", __FILE__, __LINE__);
}

enum fork_status cur_fork_status (void)
{
  return _fstat;
}

/**
 * Not all systems support the same clockid_t's. This call checks
 * if the CLOCK_MONOTONIC clockid_t is valid. If so, that is returned,
 * otherwise, CLOCK_REALTIME is returned.
 *
 * The clockid_t that was found to work on the first call is
 * cached for subsequent calls.
 */
clockid_t check_get_clockid()
{
	static clockid_t clockid = -1;

	if(clockid == -1)
	{
/*
 * Only check if we have librt available. Otherwise, the clockid
 * will be ignored anyway, as the clock_gettime() and
 * timer_create() functions will be re-implemented in libcompat.
 * Worse, if librt and alarm() are unavailable, this check
 * will result in an assert(0).
 */
#ifdef HAVE_LIBRT
		timer_t timerid;
		if(timer_create(CLOCK_MONOTONIC, NULL, &timerid) == 0)
		{
			timer_delete(timerid);
			clockid = CLOCK_MONOTONIC;
		}
		else
		{
			clockid = CLOCK_REALTIME;
		}
#else
	clockid = CLOCK_MONOTONIC;
#endif
	}

	return clockid;
}
