File Coverage

pp-logzero.c

Criterion	Covered	Total	%
statement	19	28	67.8
branch	20	88	22.7
condition			n/a
subroutine			n/a
pod			n/a
total	39	116	33.6

#line 453 "lib/PDL/PP.pm"
/*
 * THIS FILE WAS GENERATED BY PDL::PP from HMM.pd! Do not modify!
 */

#define PDL_FREE_CODE(trans, destroy, comp_free_code, ntpriv_free_code) \
    if (destroy) { \
	comp_free_code \
    } \
    if ((trans)->dims_redone) { \
	ntpriv_free_code \
    }

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "pdl.h"
#include "pdlcore.h"
#define PDL PDL_HMM
extern Core* PDL; /* Structure hold core C functions */
#line 23 "pp-logzero.c"

#include

/*#define DEBUG_ALPHA*/
/*#define DEBUG_BETA*/
/*#define DEBUG_VITERBI*/


/* logadd(x,y) = log(exp(x)+exp(y))
 *   + Code from Manning & Schütze (1997), Sec. 9.4, page 337
 *
 * LOG_BIG = log(1E31)
 */
#define LOG_BIG    71.3801378828154
#define LOG_ZERO  -1E+38
#define LOG_ONE    0
#define LOG_NONE   1
static inline double logadd1(double x, double y) {
  if      (y-x > LOG_BIG) return y;
  else if (x-y > LOG_BIG) return x;
  /*else        return min(x,y) + log(exp(x-min(x,y)) + exp(y-min(x,y))); */
  else if (x
  else          return y        + log(exp(x-y)        + 1);
}
static inline double logadd0(double x, double y) {
  return log(exp(x)+exp(y));
}

/* logdiff(x,y) = log(exp(x)-exp(y))
 *   + adapted from above
 *   + always returns positive (i.e. symmetric difference)
 */
static inline double logdiff1(double x, double y) {
  if      (y-x > LOG_BIG) { return y; }
  else if (x-y > LOG_BIG) { return x; }
  /*else        { return max(x,y) + log(exp(max(x,y)-max(x,y)) - exp(min(x,y)-max(x,y))); } */
  /*                   = max(x,y) + log( 1 - exp(min(x,y)-max(x,y))); } */
  else if (x>y) { return x        + log( 1 - exp(y-x)); }
  else          { return y        + log( 1 - exp(x-y)); }
}
static inline double logdiff0(double x, double y) {
  return log(x>y ? (exp(x)-exp(y)) : (exp(y)-exp(x)));
}

/*
#define logadd(x,y) logadd0(x,y)
#define logdiff(x,y) logdiff0(x,y)
*/

#define logadd(x,y) logadd1(x,y)
#define logdiff(x,y) logdiff1(x,y)


#line 1857 "lib/PDL/PP.pm"
pdl_error pdl_logzero_readdata(pdl_trans *__privtrans) {
  pdl_error PDL_err = {0, NULL, 0};
#line 80 "pp-logzero.c"
  if (!__privtrans->broadcast.incs) return PDL->make_error(PDL_EUSERERROR, "Error in logzero:" "broadcast.incs NULL");
  /* broadcastloop declarations */
  int __brcloopval;
  register PDL_Indx __tind0,__tind1; /* counters along dim */
  register PDL_Indx __tnpdls = __privtrans->broadcast.npdls;
  /* dims here are how many steps along those dims */
  register PDL_Indx __tinc0_a = PDL_BRC_INC(__privtrans->broadcast.incs,__tnpdls,0,0);
  register PDL_Indx __tinc1_a = PDL_BRC_INC(__privtrans->broadcast.incs,__tnpdls,0,1);
  #define PDL_BROADCASTLOOP_START_logzero_readdata PDL_BROADCASTLOOP_START( \
    readdata, \
    __privtrans->broadcast, \
    __privtrans->vtable, \
    a_datap += __offsp[0]; \
    , \
    (  ,a_datap += __tinc1_a - __tinc0_a * __tdims0 \
    ), \
    (  ,a_datap += __tinc0_a \
    ) \
  )
  #define PDL_BROADCASTLOOP_END_logzero_readdata PDL_BROADCASTLOOP_END( \
    __privtrans->broadcast, \
    a_datap -= __tinc1_a * __tdims1 + __offsp[0]; \
  )
  #ifndef PDL_DECLARE_PARAMS_logzero_1
  #define PDL_DECLARE_PARAMS_logzero_1(PDL_TYPE_OP,PDL_PPSYM_OP) \
    PDL_DECLARE_PARAMETER_BADVAL(PDL_TYPE_OP, a, (__privtrans->pdls[0]), 1, PDL_PPSYM_OP)
  #endif
  #define PDL_IF_BAD(t,f) f
  switch (__privtrans->__datatype) { /* Start generic switch */
    case PDL_F: {
      PDL_DECLARE_PARAMS_logzero_1(PDL_Float,F)
        {PDL_BROADCASTLOOP_START_logzero_readdata   (a_datap)[0] = LOG_ZERO; PDL_BROADCASTLOOP_END_logzero_readdata __privtrans->pdls[0]->state &= ~PDL_BADVAL;}
    } break;
    case PDL_D: {
      PDL_DECLARE_PARAMS_logzero_1(PDL_Double,D)
        {PDL_BROADCASTLOOP_START_logzero_readdata   (a_datap)[0] = LOG_ZERO; PDL_BROADCASTLOOP_END_logzero_readdata __privtrans->pdls[0]->state &= ~PDL_BADVAL;}
    } break;
    case PDL_LD: {
      PDL_DECLARE_PARAMS_logzero_1(PDL_LDouble,E)
        {PDL_BROADCASTLOOP_START_logzero_readdata   (a_datap)[0] = LOG_ZERO; PDL_BROADCASTLOOP_END_logzero_readdata __privtrans->pdls[0]->state &= ~PDL_BADVAL;}
    } break;
    default: return PDL->make_error(PDL_EUSERERROR, "PP INTERNAL ERROR in logzero: unhandled datatype(%d), only handles (FDE)! PLEASE MAKE A BUG REPORT\n", __privtrans->__datatype);
  }
  #undef PDL_IF_BAD
  return PDL_err;
}

static pdl_datatypes pdl_logzero_vtable_gentypes[] = { PDL_F, PDL_D, PDL_LD, -1 };
static PDL_Indx pdl_logzero_vtable_realdims[] = { 0 };
static char *pdl_logzero_vtable_parnames[] = { "a" };
static short pdl_logzero_vtable_parflags[] = {
  PDL_PARAM_ISCREAT|PDL_PARAM_ISOUT|PDL_PARAM_ISWRITE
};
static pdl_datatypes pdl_logzero_vtable_partypes[] = { -1 };
static PDL_Indx pdl_logzero_vtable_realdims_starts[] = { 0 };
static PDL_Indx pdl_logzero_vtable_realdims_ind_ids[] = { 0 };
static char *pdl_logzero_vtable_indnames[] = { "" };
pdl_transvtable pdl_logzero_vtable = {
  PDL_TRANS_DO_BROADCAST|PDL_TRANS_BADPROCESS, 0, pdl_logzero_vtable_gentypes, 0, 1, NULL /*CORE21*/,
  pdl_logzero_vtable_realdims, pdl_logzero_vtable_parnames,
  pdl_logzero_vtable_parflags, pdl_logzero_vtable_partypes,
  pdl_logzero_vtable_realdims_starts, pdl_logzero_vtable_realdims_ind_ids, 0,
  0, pdl_logzero_vtable_indnames,
  NULL, pdl_logzero_readdata, NULL,
  NULL,
  0,"PDL::HMM::logzero"
};


pdl_error pdl_run_logzero(pdl  *a) {
  pdl_error PDL_err = {0, NULL, 0};
  if (!PDL) return (pdl_error){PDL_EFATAL, "PDL core struct is NULL, can't continue",0};
  pdl_trans *__privtrans = PDL->create_trans(&pdl_logzero_vtable);
  if (!__privtrans) return PDL->make_error_simple(PDL_EFATAL, "Couldn't create trans");
  __privtrans->pdls[0] = a;
  PDL_RETERROR(PDL_err, PDL->type_coerce(__privtrans));
  PDL_RETERROR(PDL_err, PDL->make_trans_mutual(__privtrans));
  return PDL_err;
}