/*
     ccp4_general_f.c: Fortran API to ccp4_general.c.
     Copyright (C) 2001  CCLRC, Martyn Winn et al

     This library is free software: you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public License
     version 3, modified in accordance with the provisions of the 
     license to address the requirements of UK law.
 
     You should have received a copy of the modified GNU Lesser General 
     Public License along with this library.  If not, copies may be 
     downloaded from http://www.ccp4.ac.uk/ccp4license.php
 
     This program 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.
*/

/** @file ccp4_general_f.c
 *  Fortran API to ccp4_general.c.
 *  Created Oct. 2001 by Martyn Winn
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "ccp4_errno.h"
#include "ccp4_fortran.h"
#include "ccp4_parser.h"
#include "ccp4_program.h"
#include "ccp4_utils.h"
#include "ccp4_general.h"
#include "cmtzlib.h"
#include "csymlib.h"
/* rcsid[] = "$Id$" */

/** Free all memory malloc'd from static pointers in Fortran interface.
 * To be called before program exit. The function can be
 * registered with atexit.
 */
void ccp4f_mem_tidy(void) {
  MtzMemTidy();
  ccp4spg_mem_tidy();
}

/* MVS was defaulting to assigning GETARG to be returning an int and it aint*/
#ifdef _MSC_VER
#if (CALL_LIKE_MVS==2)
 void CCP4H_INIT();
 void CCP4H_SUMMARY_BEG();
 void CCP4H_SUMMARY_END();
 void CCP4H_PRE_BEG();
#else
 int __stdcall IARGC();
 void __stdcall GETARG(int *i,char *arg,int arg_len);
 void __stdcall CCP4H_INIT();
 void __stdcall CCP4H_SUMMARY_BEG();
 void __stdcall CCP4H_SUMMARY_END();
 void __stdcall CCP4H_PRE_BEG();
#endif
#endif

#ifdef GFORTRAN
extern int _gfortran_iargc(void);
extern void _gfortran_getarg(int *i,char *arg,int arg_len);
#endif

FORTRAN_SUBR ( CCPFYP, ccpfyp,
               (),
               (),
               ())
{ int argc, i, ierr, arg_len=500, debug=0;
  char **argv=NULL, arg[500];

  /* turn on line buffering for stdout from C (don't think this affects
     Fortran side). This ensures we get library messages, but will slow
     things down. Is this what we want? */
  /*if(ccp4_utils_outbuf())
    ccp4_utils_print("OUTBUF:Can't turn off output buffering"); */
  /* Turn off any buffering on input. This allows mized C and Fortran
     reading of stdin */
  FORTRAN_CALL(OUTBUF,outbuf,(),(),());
  if(ccp4_utils_noinpbuf())
    ccp4_utils_print("NOINPBUF:Can't turn off input buffering");

  if (debug) 
    printf(" Entering CCPFYP \n");

/* couldn't find a C equivalent to this. In any case, since
   these functions are for Fortran programs, this may be
   the only way?? */
/*
   Note: for GFORTRAN iargc and getarg are intrinsics
   which do not follow the postpended underscore convention
   */
  /* IARGC doesn't include argv[0] */
#ifdef GFORTRAN
  argc = _gfortran_iargc() +1;
#else
  argc = FORTRAN_CALL (IARGC, iargc, (), (), ()) + 1;
#endif
  argv = (char **) ccp4_utils_malloc(argc*sizeof(char *));
  if (debug) 
    printf("Allocating memory for %d command line arguments \n",argc);
  memset(arg, ' ', arg_len); /* necessary for ccp4_FtoCString */
  for (i = 0; i < argc; ++i) {
#ifdef GFORTRAN
    _gfortran_getarg_i4(&i,arg,arg_len);
#else
    FORTRAN_CALL (GETARG, getarg, (&i,arg,arg_len), (&i,arg), (&i,arg,arg_len));
#endif
    argv[i] = ccp4_FtoCString(arg,arg_len);
    if (debug) 
      printf("CCPFYP: command line argument %d %s\n",i,argv[i]);
  }

  /* Do the preprocessing and return the error status */
  ierr = ccp4fyp(argc, argv);

  /* Calls to ccp4_FtoCString allocate memory for argv[..]
     which needs to be explicitly freed before leaving this
     function */
  for (i = 0; i < argc; i++) {
    if (argv[i]) {
      free(argv[i]);
    }
  }
  /* Also need to free argv itself */
  if (argv) free(argv);

  /* Now act on any errors from ccp4fyp */
  if (ierr) {
    /* Pass the error status and last error message to ccperror */
    ccperror(ierr,(char*) ccp4_strerror(ccp4_errno));
  }

  /* initialise html/summary stuff 
     Note, command line switches dealt with in ccp4fyp */
  FORTRAN_CALL (CCP4H_INIT, ccp4h_init, (), (), ());

  if (debug) 
    printf(" Leaving CCPFYP \n");
  return;
}

/* pass html and summary flags to C level */
FORTRAN_SUBR ( CCP4H_INIT_CLIB, ccp4h_init_clib,
               (int *ihtml, int *isumm),
               (int *ihtml, int *isumm),
               (int *ihtml, int *isumm))
{
  html_log_output(*ihtml);
  summary_output(*isumm);
}

FORTRAN_SUBR ( CCPUPC, ccpupc,
               (fpstr string, int string_len),
               (fpstr string),
               (fpstr string, int string_len))
{
  char *string2, *string3;

  string2 = ccp4_FtoCString(FTN_STR(string), FTN_LEN(string));
  if (!string2) return;
  string3 = (char *) ccp4_utils_malloc((strlen(string2)+1)*sizeof(char));
  strtoupper(string3, string2);
  string3[strlen(string3)] = '\0';

  ccp4_CtoFString(FTN_STR(string), FTN_LEN(string), string3);

  free((char *) string2);
  free((char *) string3);
}

FORTRAN_SUBR ( CCPLWC, ccplwc,
               (fpstr string, int string_len),
               (fpstr string),
               (fpstr string, int string_len))
{
  char *string2, *string3;

  string2 = ccp4_FtoCString(FTN_STR(string), FTN_LEN(string));
  if (!string2) return;
  string3 = (char *) ccp4_utils_malloc((strlen(string2)+1)*sizeof(char));
  strtolower(string3, string2);
  string3[strlen(string3)] = '\0';

  ccp4_CtoFString(FTN_STR(string), FTN_LEN(string), string3);

  free((char *) string2);
  free((char *) string3);
}

#define TMP_LENGTH 128 /* this is defined outside the subroutine 
                          as some complers didn't like it insde. */

FORTRAN_SUBR ( CCPERR, ccperr,
               (const int *istat, const fpstr errstr, int errstr_len),
               (const int *istat, const fpstr errstr),
               (const int *istat, const fpstr errstr, int errstr_len))
{ 
  int length;
  char tmp_errstr[TMP_LENGTH];

  length = (FTN_LEN(errstr) < TMP_LENGTH-1) ? FTN_LEN(errstr) : TMP_LENGTH-1 ; 
  strncpy(tmp_errstr,errstr,length);
  tmp_errstr[length]='\0';

  /* work around a buglet: gfortran-4.1.2 glibc-2.7-2 (2.6.23.1-37.fc8 x86_64 SMP)
     Flush stdout using a Fortran call before printing further. C. Flensburg 20071029. */
#ifdef GFORTRAN
  FORTRAN_CALL (CCP4_FFLUSH_STDOUT, ccp4_fflush_stdout, (), (), ());
#endif

  if (abs(*istat) <= 2)
    FORTRAN_CALL (CCP4H_SUMMARY_BEG, ccp4h_summary_beg, (), (), ());

  if (*istat==0 || *istat==1) ccp4f_mem_tidy();

  ccperror(*istat, tmp_errstr);

  /* in fact, doesn't return if istat 0 or 1 */
  if (abs(*istat) <= 2)
    FORTRAN_CALL (CCP4H_SUMMARY_END, ccp4h_summary_end, (), (), ());
}

FORTRAN_SUBR ( QPRINT, qprint,
               (const int *iflag, const fpstr msg, int msg_len),
               (const int *iflag, const fpstr msg),
               (const int *iflag, const fpstr msg, int msg_len))
{ 
  char *tmp_msg;

  tmp_msg = ccp4_FtoCString(FTN_STR(msg), FTN_LEN(msg));
  ccp4printf(*iflag,"%s\n",tmp_msg); 

  free((char *) tmp_msg);
}

/* switched back to ccplib.f 
FORTRAN_FUN ( int, LENSTR, lenstr,
               (fpstr string, int string_len),
               (fpstr string),
               (fpstr string, int string_len))
{
  return ( (int) ccp4_utils_flength (FTN_STR(string), FTN_LEN(string)) );
}
*/

/** Fortran wrapper to integer data function.
 * @param imonth Month (1-12).
 * @param iday Day (1-31).
 * @param iyear Year (4 digit).
 */
#if ! defined (_MSC_VER) 
FORTRAN_SUBR ( UIDATE, uidate,
               (int *imonth, int *iday, int *iyear),
               (int *imonth, int *iday, int *iyear),
               (int *imonth, int *iday, int *iyear))
{ 
  int iarray[3];

  ccp4_utils_idate (iarray);
  *imonth = iarray[1];
  *iday = iarray[0];
  *iyear = iarray[2];
}
#endif

/** Fortran wrapper to string data function.
 * @param caldat Date string in format dd/mm/yy.
 */
FORTRAN_SUBR ( CCPDAT, ccpdat,
               (fpstr caldat, int caldat_len),
               (fpstr caldat),
               (fpstr caldat, int caldat_len))
{ 
  char date[11];

  ccp4_utils_date(date);
  /* convert 4-digit year to old-style 2-digit year */
  date[6] = date[8];
  date[7] = date[9];
  date[8] = '\0';
  ccp4_CtoFString(FTN_STR(caldat),FTN_LEN(caldat),date);
}

FORTRAN_SUBR ( CCPTIM, ccptim,
               (int *iflag, float *cpu, float *elaps),
               (int *iflag, float *cpu, float *elaps),
               (int *iflag, float *cpu, float *elaps))
{ 
  static int tim0;
  static float tlast;
  float tarray[2];

  if (*iflag == 0) {
    *elaps = 0.0;
    tim0 = time(NULL);
    *cpu = tlast = ccp4_utils_etime(tarray);
  } else {
    *elaps = time(NULL) - (float) tim0;
    *cpu = ccp4_utils_etime(tarray) - tlast;
  }

}
#if ! defined (_MSC_VER)
FORTRAN_SUBR ( UTIME, utime,
               (fpstr ctime, int ctime_len),
               (fpstr ctime),
               (fpstr ctime, int ctime_len))
{ 
  char time[9];

  ccp4_CtoFString(FTN_STR(ctime),FTN_LEN(ctime),ccp4_utils_time(time));

}


FORTRAN_SUBR ( UCPUTM, ucputm,
               (float *sec), (float *sec), (float *sec))
{
  static float tlast;
  float tarray[2];

  if (*sec == 0.0) {
    *sec = tlast = ccp4_utils_etime(tarray);
  } else {
    *sec = ccp4_utils_etime(tarray) - tlast;
  }

}
#endif

FORTRAN_SUBR ( CCP4_VERSION, ccp4_version,
               (const fpstr version, int version_len),
               (const fpstr version),
               (const fpstr version, int version_len))
{ 
  ccp4_CtoFString(FTN_STR(version), FTN_LEN(version), CCP4_VERSION_NO); 
}

FORTRAN_SUBR ( CCP4_PROG_VERSION, ccp4_prog_version,
               (const fpstr version, int *iflag, int version_len),
               (const fpstr version, int *iflag),
               (const fpstr version, int version_len, int *iflag))
{ 
  char *tmp_vers;

  if (*iflag) {
    ccp4_CtoFString(FTN_STR(version), FTN_LEN(version), ccp4_prog_vers(NULL)); 
  } else {
    tmp_vers = ccp4_FtoCString(FTN_STR(version), FTN_LEN(version));   
    ccp4_prog_vers(tmp_vers);
    free((char *) tmp_vers);
  }
}

FORTRAN_SUBR ( CCPVRS, ccpvrs,
               (const int *ilp, const fpstr prog, const fpstr vdate,
                                int prog_len, int vdate_len),
               (const int *ilp, const fpstr prog, const fpstr vdate),
               (const int *ilp, const fpstr prog, int prog_len,
		                const fpstr vdate, int vdate_len))

{ 
  char *tmp_prog;

  FORTRAN_CALL (CCP4H_SUMMARY_BEG, ccp4h_summary_beg, (), (), ());
  FORTRAN_CALL (CCP4H_PRE_BEG, ccp4h_pre_beg, (), (), ());

  tmp_prog = ccp4_FtoCString(FTN_STR(prog), FTN_LEN(prog));
  ccp4ProgramName(tmp_prog);
  ccp4_banner();

  FORTRAN_CALL (CCP4H_SUMMARY_END, ccp4h_summary_end, (), (), ());

  free((char *) tmp_prog);
}

FORTRAN_SUBR ( CCPRCS, ccprcs,
               (const int *ilp, const fpstr prog, const fpstr rcsdat,
                                int prog_len, int rcsdat_len),
               (const int *ilp, const fpstr prog, const fpstr rcsdat),
               (const int *ilp, const fpstr prog, int prog_len,
		                const fpstr rcsdat, int rcsdat_len))

{ 
  char *tmp_prog,*tmp_rcsdat;

  tmp_prog = ccp4_FtoCString(FTN_STR(prog), FTN_LEN(prog));
  tmp_rcsdat = ccp4_FtoCString(FTN_STR(rcsdat), FTN_LEN(rcsdat));

  FORTRAN_CALL (CCP4H_SUMMARY_BEG, ccp4h_summary_beg, (), (), ());
  FORTRAN_CALL (CCP4H_PRE_BEG, ccp4h_pre_beg, (), (), ());

  ccp4ProgramName(tmp_prog);
  ccp4RCSDate(tmp_rcsdat);
  ccp4_banner();

  FORTRAN_CALL (CCP4H_SUMMARY_END, ccp4h_summary_end, (), (), ());

  free((char *) tmp_prog);
}

FORTRAN_SUBR ( CCPPNM, ccppnm,
               (const fpstr pnm, int pnm_len),
               (const fpstr pnm, int pnm_len),
               (const fpstr pnm, int pnm_len))

{ 
  ccp4_CtoFString(FTN_STR(pnm), FTN_LEN(pnm), ccp4ProgramName(NULL)); 
}

FORTRAN_FUN ( ftn_logical, CCPEXS, ccpexs,
               (const fpstr name, int name_len),
               (const fpstr name),
               (const fpstr name, int name_len))
{
  char *string, *string1;

  string = ccp4_FtoCString(FTN_STR(name), FTN_LEN(name));
  string1 = (char *) getenv(string);
  if (string1) {
    string = (char *) ccp4_utils_realloc(string,strlen(string1)+1);
    strcpy(string,string1);
  }

  return ( ccpexists(string) ? FORTRAN_LOGICAL_TRUE : FORTRAN_LOGICAL_FALSE );
}

FORTRAN_FUN ( ftn_logical, CCPLIC, ccplic,
               (const fpstr name, int name_len),
               (const fpstr name),
               (const fpstr name, int name_len))
{
  char *string;

  string = ccp4_FtoCString(FTN_STR(name), FTN_LEN(name));

  return ( ccp4_licence_exists(string) ? FORTRAN_LOGICAL_TRUE : FORTRAN_LOGICAL_FALSE );
}

/** Print timing information to stdout
 * wraps ccp4ProgramTime
 */
FORTRAN_SUBR (GETELAPSED, getelapsed,(void) , (void) , (void))
{
  ccp4ProgramTime(0);
}

/* wrapper for ccp4VerbosityLevel */
FORTRAN_FUN ( int, CCP4VERBOSITYLEVEL, ccp4verbositylevel,
              (int *level),
              (int *level),
              (int *level))
{
  return ( ccp4VerbosityLevel(*level) );
}