#+TITLE: Verificarlo CI
#+SETUPFILE: ../tools/theme.setup
#+INCLUDE: ../tools/lib.org

* Headers                                                          :noexport:

  #+begin_src c :tangle (eval h_private_func)
#ifndef QMCKL_VERIFICARLO_HPT
#define QMCKL_VERIFICARLO_HPT

#include <stdbool.h>


#ifdef VFC_CI
#include <vfc_probes.h>
extern vfc_probes * probes;
#endif


  #+end_src

  #+begin_src c :tangle (eval c)
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>

#ifdef VFC_CI
#include <vfc_probes.h>
vfc_probes probes;
#else

/* Disable GCC warnings with unused variables */
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

#endif

  #+end_src

* Verificarlo probes

This file contains utility functions to enable the Verificarlo
Continuous Integration system (~VFC_CI~).

It is a wrapper to Verificarlo's ~vfc_probes~ system. The goal of QMCkl
probes is to simplify the use of ~vfc_probes~, and to provide functions that
can be called either with or without ~VFC_CI~ support by using ~#ifndef~
statements :

- when ~VFC_CI~ is disabled, the functions will either return ~false~
  (no error) or perform a check based on a reference value

- when ~VFC_CI~ is enabled, the functions will simply encapsulate
calls to ~vfc_probe~.

Moreover, one does not have to worry about the life cycle of the probes
structure, as it is automatically created, dumped and freed by this wrapper.

~VFC_CI~ support can be enabled by using the following configure command :

  #+begin_src bash
QMCKL_DEVEL=1 ./configure --prefix=$PWD/_install --enable-silent-rules \
  --enable-maintainer-mode CC=verificarlo-f FC=verificarlo-f --host=x86_64
  #+end_src

Finally, this wrapper also comes with a Fortran interface (in its dedicated
file).

To learn more about Verificarlo CI :
https://github.com/verificarlo/verificarlo/blob/master/doc/06-Postprocessing.md#verificarlo-ci


** Automatically initialize the ~vfc_probe~ object if ~VFC_CI~ is defined

  #+begin_src c :tangle (eval h_private_func)
void qmckl_init_probes();
  #+end_src

  #+begin_src c :tangle (eval c)
void qmckl_init_probes(){
#ifdef VFC_CI
	probes = vfc_init_probes();
#endif
}
  #+end_src

** Standard probe, without check

 - if ~VFC_CI~ is defined, place a standard probe
 - if ~VFC_CI~ is undefined, return ~false~ (no error)

  #+begin_src c :tangle (eval h_private_func)
bool qmckl_probe(
    char * testName,
    char * varName,
    double value
);
  #+end_src

  #+begin_src c :tangle (eval c)
bool qmckl_probe(
    char * testName,
    char * varName,
    double value)
{
#ifdef VFC_CI
    return vfc_probe(&probes, testName, varName, value);
#else
	return false;
#endif
}
  #+end_src

** Probe with absolute check

 - if ~VFC_CI~ is defined, place a probe with an absolute check
 - if ~VFC_CI~ is undefined, perform an absolute check based on target value
   and accuracy

  #+begin_src c :tangle (eval h_private_func)
bool qmckl_probe_check(
    char * testName,
    char * varName,
    double value,
    double expectedValue,
    double accuracyTarget
);
  #+end_src

  #+begin_src c :tangle (eval c)
bool qmckl_probe_check(
    char * testName,
    char * varName,
    double value,
    double expectedValue,
    double accuracyTarget)
{
#ifdef VFC_CI
    return vfc_probe_check(&probes, testName, varName, value, accuracyTarget);
#else
    return !(fabs(value - expectedValue) < accuracyTarget);
#endif
}
  #+end_src

** Probe with relative check

 - if ~VFC_CI~ is defined, place a probe with a relative check
 - if ~VFC_CI~ is undefined, perform a relative check based on target value
   and accuracy

  #+begin_src c :tangle (eval h_private_func)
bool qmckl_probe_check_relative(
    char * testName,
    char * varName,
    double value,
    double expectedValue,
    double accuracyTarget
);
  #+end_src

  #+begin_src c :tangle (eval c)
bool qmckl_probe_check_relative (
    char * testName,
    char * varName,
    double value,
    double expectedValue,
    double accuracyTarget)
{
#ifdef VFC_CI
    return vfc_probe_check_relative(&probes, testName, varName, value, accuracyTarget);
#else
    return !(fabs(value - expectedValue) / fabs(expectedValue) < accuracyTarget);
#endif
}
  #+end_src

** Automatically delete and dump the vfc_probe object if ~VFC_CI~ is defined

  #+begin_src c :tangle (eval h_private_func)
void qmckl_dump_probes();
  #+end_src

  #+begin_src c :tangle (eval c)
void qmckl_dump_probes(){
#ifdef VFC_CI
    vfc_dump_probes(&probes);
#endif
}
  #+end_src

* Fortran wrappers

  #+begin_src c :tangle (eval h_private_func)
bool qmckl_probe_f(
    char * testName,
    char * varName,
    double * value
);

bool qmckl_probe_check_f(
    char * testName,
    char * varName,
    double * value,
    double * expectedValue,
    double * accuracyTarget
);


bool qmckl_probe_check_relative_f(
    char * testName,
    char * varName,
    double * value,
    double * expectedValue,
    double * accuracyTarget
);
  #+end_src

  #+begin_src c :tangle (eval c)
bool qmckl_probe_f(
    char * testName,
    char * varName,
    double * value)
{
    return qmckl_probe(testName, varName, *value);
}


bool qmckl_probe_check_f(
    char * testName,
    char * varName,
    double * value,
    double * expectedValue,
    double * accuracyTarget)
{
    return qmckl_probe_check(
        testName, varName,
        ,*value, *expectedValue, *accuracyTarget
    );
}


bool qmckl_probe_check_relative_f(
    char * testName,
    char * varName,
    double * value,
    double * expectedValue,
    double * accuracyTarget)
{
    return qmckl_probe_check_relative(
        testName, varName,
        ,*value, *expectedValue, *accuracyTarget
    );
}
  #+end_src

  #+begin_src f90 :tangle (eval f)
module qmckl_verificarlo_f
  interface
     logical(c_bool) function qmckl_probe &
          (testName, varName, val) &
          bind(C, name="qmckl_probe_f")

       use, intrinsic :: iso_c_binding
       import
       implicit none

       character(C_CHAR), dimension(*) :: testName
       character(C_CHAR), dimension(*) :: varName

       real(C_DOUBLE) :: val
     end function qmckl_probe

     logical(c_bool) function qmckl_probe_check &
          (testName, varName, val, expectedValue, accuracyTarget) &
          bind(C, name="qmckl_probe_check_f")

       use, intrinsic :: iso_c_binding
       import
       implicit none

       character(C_CHAR), dimension(*) :: testName
       character(C_CHAR), dimension(*) :: varName

       real(C_DOUBLE) :: val
       real(C_DOUBLE) :: expectedValue
       real(C_DOUBLE) :: accuracyTarget
     end function qmckl_probe_check

     logical(c_bool) function qmckl_probe_check_relative &
          (testName, varName, val, expectedValue, accuracyTarget) &
          bind(C, name="qmckl_probe_check_relative_f")

       use, intrinsic :: iso_c_binding
       import
       implicit none

       character(C_CHAR), dimension(*) :: testName
       character(C_CHAR), dimension(*) :: varName

       real(C_DOUBLE) :: val
       real(C_DOUBLE) :: expectedValue
       real(C_DOUBLE) :: accuracyTarget
     end function qmckl_probe_check_relative
  end interface
end module qmckl_verificarlo_f
  #+end_src

* End of files                                                     :noexport:

  #+begin_src c :tangle (eval c)
#ifndef VFC_CI
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
#endif
  #+end_src

  #+begin_src c :comments link :tangle (eval h_private_func)
#endif
  #+end_src