cannam@127: /*
cannam@127:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@127:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@127:  *
cannam@127:  * This program is free software; you can redistribute it and/or modify
cannam@127:  * it under the terms of the GNU General Public License as published by
cannam@127:  * the Free Software Foundation; either version 2 of the License, or
cannam@127:  * (at your option) any later version.
cannam@127:  *
cannam@127:  * This program is distributed in the hope that it will be useful,
cannam@127:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@127:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@127:  * GNU General Public License for more details.
cannam@127:  *
cannam@127:  * You should have received a copy of the GNU General Public License
cannam@127:  * along with this program; if not, write to the Free Software
cannam@127:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@127:  *
cannam@127:  */
cannam@127: 
cannam@127: #include "api.h"
cannam@127: #include "dft.h"
cannam@127: #include "rdft.h"
cannam@127: 
cannam@127: #include "x77.h"
cannam@127: 
cannam@127: /* if F77_FUNC is not defined, then we don't know how to mangle identifiers
cannam@127:    for the Fortran linker, and we must omit the f77 API. */
cannam@127: #if defined(F77_FUNC) || defined(WINDOWS_F77_MANGLING)
cannam@127: 
cannam@127: /*-----------------------------------------------------------------------*/
cannam@127: /* some internal functions used by the f77 api */
cannam@127: 
cannam@127: /* in fortran, the natural array ordering is column-major, which
cannam@127:    corresponds to reversing the dimensions relative to C's row-major */
cannam@127: static int *reverse_n(int rnk, const int *n)
cannam@127: {
cannam@127:      int *nrev;
cannam@127:      int i;
cannam@127:      A(FINITE_RNK(rnk));
cannam@127:      nrev = (int *) MALLOC(sizeof(int) * (unsigned)rnk, PROBLEMS);
cannam@127:      for (i = 0; i < rnk; ++i)
cannam@127:           nrev[rnk - i - 1] = n[i];
cannam@127:      return nrev;
cannam@127: }
cannam@127: 
cannam@127: /* f77 doesn't have data structures, so we have to pass iodims as
cannam@127:    parallel arrays */
cannam@127: static X(iodim) *make_dims(int rnk, const int *n,
cannam@127: 			   const int *is, const int *os)
cannam@127: {
cannam@127:      X(iodim) *dims;
cannam@127:      int i;
cannam@127:      A(FINITE_RNK(rnk));
cannam@127:      dims = (X(iodim) *) MALLOC(sizeof(X(iodim)) * (unsigned)rnk, PROBLEMS);
cannam@127:      for (i = 0; i < rnk; ++i) {
cannam@127:           dims[i].n = n[i];
cannam@127:           dims[i].is = is[i];
cannam@127:           dims[i].os = os[i];
cannam@127:      }
cannam@127:      return dims;
cannam@127: }
cannam@127: 
cannam@127: typedef struct {
cannam@127:      void (*f77_write_char)(char *, void *);
cannam@127:      void *data;
cannam@127: } write_char_data;
cannam@127: 
cannam@127: static void write_char(char c, void *d)
cannam@127: {
cannam@127:      write_char_data *ad = (write_char_data *) d;
cannam@127:      ad->f77_write_char(&c, ad->data);
cannam@127: }
cannam@127: 
cannam@127: typedef struct {
cannam@127:      void (*f77_read_char)(int *, void *);
cannam@127:      void *data;
cannam@127: } read_char_data;
cannam@127: 
cannam@127: static int read_char(void *d)
cannam@127: {
cannam@127:      read_char_data *ed = (read_char_data *) d;
cannam@127:      int c;
cannam@127:      ed->f77_read_char(&c, ed->data);
cannam@127:      return (c < 0 ? EOF : c);
cannam@127: }
cannam@127: 
cannam@127: static X(r2r_kind) *ints2kinds(int rnk, const int *ik)
cannam@127: {
cannam@127:      if (!FINITE_RNK(rnk) || rnk == 0)
cannam@127: 	  return 0;
cannam@127:      else {
cannam@127: 	  int i;
cannam@127: 	  X(r2r_kind) *k;
cannam@127: 
cannam@127: 	  k = (X(r2r_kind) *) MALLOC(sizeof(X(r2r_kind)) * (unsigned)rnk, PROBLEMS);
cannam@127: 	  /* reverse order for Fortran -> C */
cannam@127: 	  for (i = 0; i < rnk; ++i)
cannam@127: 	       k[i] = (X(r2r_kind)) ik[rnk - 1 - i];
cannam@127: 	  return k;
cannam@127:      }
cannam@127: }
cannam@127: 
cannam@127: /*-----------------------------------------------------------------------*/
cannam@127: 
cannam@127: #define F77(a, A) F77x(x77(a), X77(A))
cannam@127: 
cannam@127: #ifndef WINDOWS_F77_MANGLING
cannam@127: 
cannam@127: #if defined(F77_FUNC)
cannam@127: #  define F77x(a, A) F77_FUNC(a, A)
cannam@127: #  include "f77funcs.h"
cannam@127: #endif
cannam@127: 
cannam@127: /* If identifiers with underscores are mangled differently than those
cannam@127:    without underscores, then we include *both* mangling versions.  The
cannam@127:    reason is that the only Fortran compiler that does such differing
cannam@127:    mangling is currently g77 (which adds an extra underscore to names
cannam@127:    with underscores), whereas other compilers running on the same
cannam@127:    machine are likely to use non-underscored mangling.  (I'm sick
cannam@127:    of users complaining that FFTW works with g77 but not with e.g.
cannam@127:    pgf77 or ifc on the same machine.)  Note that all FFTW identifiers
cannam@127:    contain underscores, and configure picks g77 by default. */
cannam@127: #if defined(F77_FUNC_) && !defined(F77_FUNC_EQUIV)
cannam@127: #  undef F77x
cannam@127: #  define F77x(a, A) F77_FUNC_(a, A)
cannam@127: #  include "f77funcs.h"
cannam@127: #endif
cannam@127: 
cannam@127: #else /* WINDOWS_F77_MANGLING */
cannam@127: 
cannam@127: /* Various mangling conventions common (?) under Windows. */
cannam@127: 
cannam@127: /* g77 */
cannam@127: #  define WINDOWS_F77_FUNC(a, A) a ## __
cannam@127: #  define F77x(a, A) WINDOWS_F77_FUNC(a, A)
cannam@127: #  include "f77funcs.h"
cannam@127: 
cannam@127: /* Intel, etc. */
cannam@127: #  undef WINDOWS_F77_FUNC
cannam@127: #  define WINDOWS_F77_FUNC(a, A) a ## _
cannam@127: #  include "f77funcs.h"
cannam@127: 
cannam@127: /* Digital/Compaq/HP Visual Fortran, Intel Fortran.  stdcall attribute
cannam@127:    is apparently required to adjust for calling conventions (callee
cannam@127:    pops stack in stdcall).  See also:
cannam@127:        http://msdn.microsoft.com/library/en-us/vccore98/html/_core_mixed.2d.language_programming.3a_.overview.asp
cannam@127: */
cannam@127: #  undef WINDOWS_F77_FUNC
cannam@127: #  if defined(__GNUC__)
cannam@127: #    define WINDOWS_F77_FUNC(a, A) __attribute__((stdcall)) A
cannam@127: #  elif defined(_MSC_VER) || defined(_ICC) || defined(_STDCALL_SUPPORTED)
cannam@127: #    define WINDOWS_F77_FUNC(a, A) __stdcall A
cannam@127: #  else
cannam@127: #    define WINDOWS_F77_FUNC(a, A) A /* oh well */
cannam@127: #  endif
cannam@127: #  include "f77funcs.h"
cannam@127: 
cannam@127: #endif /* WINDOWS_F77_MANGLING */
cannam@127: 
cannam@127: #endif				/* F77_FUNC */