cfortran.h

Cfortran is useful for mixing language programing when you want call some C function in your FORTRAN

#ifdef sunFortran
#if defined(sun) || defined(__sun)
#include <math.h>     /* Sun's FLOATFUNCTIONTYPE, ASSIGNFLOAT, RETURNFLOAT.  */
#else
#include "math.h"     /* i.e. if crosscompiling assume user has file. */
#endif
/* At least starting with the default C compiler SC3.0.1 of SunOS 5.3,
 * FLOATFUNCTIONTYPE, ASSIGNFLOAT, RETURNFLOAT are not required and not in
 * <math.h>, since sun C no longer promotes C float return values to doubles.
 * Therefore, only use them if defined.
 * Even if gcc is being used, assume that it exhibits the Sun C compiler
 * behavior in order to be able to use *.o from the Sun C compiler.
 * i.e. If FLOATFUNCTIONTYPE, etc. are in math.h, they required by gcc.
 */
#endif

#ifndef apolloFortran
#define COMMON_BLOCK_DEF(DEFINITION, NAME) extern DEFINITION NAME
#define CF_NULL_PROTO
#else                                         /* HP doesn't understand #elif. */
/* Without ANSI prototyping, Apollo promotes float functions to double.    */
/* Note that VAX/VMS, IBM, Mips choke on 'type function(...);' prototypes. */
#define CF_NULL_PROTO ...
#ifndef __CF__APOLLO67
#define COMMON_BLOCK_DEF(DEFINITION, NAME) \
 DEFINITION NAME __attribute((__section(NAME)))
#else
#define COMMON_BLOCK_DEF(DEFINITION, NAME) \
 DEFINITION NAME #attribute[section(NAME)]
#endif
#endif

#ifdef __cplusplus
#undef  CF_NULL_PROTO
#define CF_NULL_PROTO  ...
#endif


#ifndef USE_NEW_DELETE
#ifdef __cplusplus
#define USE_NEW_DELETE 1
#else
#define USE_NEW_DELETE 0
#endif
#endif
#if USE_NEW_DELETE
#define _cf_malloc(N) new char[N]
#define _cf_free(P)   delete[] P
#else
#define _cf_malloc(N) (char *)malloc(N)
#define _cf_free(P)   free(P)
#endif

#ifdef mipsFortran
#define CF_DECLARE_GETARG         int f77argc; char **f77argv
#define CF_SET_GETARG(ARGC,ARGV)  f77argc = ARGC; f77argv = ARGV
#else
#define CF_DECLARE_GETARG
#define CF_SET_GETARG(ARGC,ARGV)
#endif

#ifdef OLD_VAXC                          /* Allow %CC-I-PARAMNOTUSED.         */
#pragma standard                         
#endif

#define AcfCOMMA ,
#define AcfCOLON ;

/*-------------------------------------------------------------------------*/

/*               UTILITIES USED WITHIN CFORTRAN.H                          */

#define _cfMIN(A,B) (A<B?A:B)

/* 970211 - XIX.145:
   firstindexlength  - better name is all_but_last_index_lengths
   secondindexlength - better name is         last_index_length
 */
#define  firstindexlength(A) (sizeof(A[0])==1 ? 1 : (sizeof(A) / sizeof(A[0])) )
#define secondindexlength(A) (sizeof(A[0])==1 ?      sizeof(A) : sizeof(A[0])  )

/* Behavior of FORTRAN LOGICAL. All machines' LOGICAL is same size as C's int.
Conversion is automatic except for arrays which require F2CLOGICALV/C2FLOGICALV.
f2c, MIPS f77 [DECstation, SGI], VAX Ultrix f77,
HP-UX f77                                        : as in C.
VAX/VMS FORTRAN, VAX Ultrix fort,
Absoft Unix Fortran, IBM RS/6000 xlf             : LS Bit = 0/1 = TRUE/FALSE.
Apollo                                           : neg.   = TRUE, else FALSE. 
[Apollo accepts -1 as TRUE for function values, but NOT all other neg. values.]
[DECFortran for Ultrix RISC is also called f77 but is the same as VAX/VMS.]   
[MIPS f77 treats .eqv./.neqv. as .eq./.ne. and hence requires LOGICAL_STRICT.]*/

#if defined(NAGf90Fortran) || defined(f2cFortran) || defined(mipsFortran) || defined(PowerStationFortran) || defined(hpuxFortran800) || defined(AbsoftUNIXFortran) || defined(AbsoftProFortran) || defined(SXFortran)
/* SX/PowerStationFortran have 0 and 1 defined, others are neither T nor F.   */
/* hpuxFortran800 has 0 and 0x01000000 defined. Others are unknown.           */
#define LOGICAL_STRICT      /* Other Fortran have .eqv./.neqv. == .eq./.ne.   */
#endif

#define C2FLOGICALV(A,I) \
 do {int __i; for(__i=0;__i<I;__i++) A[__i]=C2FLOGICAL(A[__i]); } while (0)
#define F2CLOGICALV(A,I) \
 do {int __i; for(__i=0;__i<I;__i++) A[__i]=F2CLOGICAL(A[__i]); } while (0)

#if defined(apolloFortran)
#define C2FLOGICAL(L) ((L)?-1:(L)&~((unsigned)1<<sizeof(int)*8-1))
#define F2CLOGICAL(L) ((L)<0?(L):0) 
#else
#if defined(CRAYFortran)
#define C2FLOGICAL(L) _btol(L)
#define F2CLOGICAL(L) _ltob(&(L))     /* Strangely _ltob() expects a pointer. */
#else
#if defined(IBMR2Fortran) || defined(vmsFortran) || defined(DECFortran) || defined(AbsoftUNIXFortran)
/* How come no AbsoftProFortran ? */
#define C2FLOGICAL(L) ((L)?(L)|1:(L)&~(int)1)
#define F2CLOGICAL(L) ((L)&1?(L):0)
#else
#if defined(CONVEXFortran)
#define C2FLOGICAL(L) ((L) ? ~0 : 0 )
#define F2CLOGICAL(L) (L)
#else   /* others evaluate LOGICALs as for C. */
#define C2FLOGICAL(L) (L)
#define F2CLOGICAL(L) (L)
#ifndef LOGICAL_STRICT
#undef  C2FLOGICALV
#undef  F2CLOGICALV
#define C2FLOGICALV(A,I)
#define F2CLOGICALV(A,I)
#endif  /* LOGICAL_STRICT                     */
#endif  /* CONVEXFortran || All Others        */
#endif  /* IBMR2Fortran vmsFortran DECFortran AbsoftUNIXFortran */
#endif  /* CRAYFortran                        */
#endif  /* apolloFortran                      */

/* 970514 - In addition to CRAY, there may be other machines
            for which LOGICAL_STRICT makes no sense. */
#if defined(LOGICAL_STRICT) && !defined(CRAYFortran)
/* Force C2FLOGICAL to generate only the values for either .TRUE. or .FALSE.
   SX/PowerStationFortran only have 0 and 1 defined.
   Elsewhere, only needed if you want to do:
     logical lvariable
     if (lvariable .eq.  .true.) then       ! (1)
   instead of
     if (lvariable .eqv. .true.) then       ! (2)
   - (1) may not even be FORTRAN/77 and that Apollo's f77 and IBM's xlf
     refuse to compile (1), so you are probably well advised to stay away from 
     (1) and from LOGICAL_STRICT.
   - You pay a (slight) performance penalty for using LOGICAL_STRICT. */
#undef  C2FLOGICAL
#ifdef hpuxFortran800
#define C2FLOGICAL(L) ((L)?0x01000000:0)
#else
#if defined(apolloFortran) || defined(vmsFortran) || defined(DECFortran)
#define C2FLOGICAL(L) ((L)?-1:0) /* These machines use -1/0 for .true./.false.*/
#else
#define C2FLOGICAL(L) ((L)? 1:0) /* All others     use +1/0 for .true./.false.*/
#endif
#endif
#endif /* LOGICAL_STRICT */

/* Convert a vector of C strings into FORTRAN strings. */
#ifndef __CF__KnR
static char *c2fstrv(char* cstr, char *fstr, int elem_len, int sizeofcstr)
#else
static char *c2fstrv(      cstr,       fstr,     elem_len,     sizeofcstr)
                     char* cstr; char *fstr; int elem_len; int sizeofcstr;
#endif
{ int i,j;
/* elem_len includes \0 for C strings. Fortran strings don't have term. \0.
   Useful size of string must be the same in both languages. */
for (i=0; i<sizeofcstr/elem_len; i++) {
  for (j=1; j<elem_len && *cstr; j++) *fstr++ = *cstr++;
  cstr += 1+elem_len-j;
  for (; j<elem_len; j++) *fstr++ = ' ';
} /* 95109 - Seems to be returning the original fstr. */
return fstr-sizeofcstr+sizeofcstr/elem_len; }

/* Convert a vector of FORTRAN strings into C strings. */
#ifndef __CF__KnR
static char *f2cstrv(char *fstr, char* cstr, int elem_len, int sizeofcstr)
#else
static char *f2cstrv(      fstr,       cstr,     elem_len,     sizeofcstr)
                     char *fstr; char* cstr; int elem_len; int sizeofcstr; 
#endif
{ int i,j;
/* elem_len includes \0 for C strings. Fortran strings don't have term. \0.
   Useful size of string must be the same in both languages. */
cstr += sizeofcstr;
fstr += sizeofcstr - sizeofcstr/elem_len;
for (i=0; i<sizeofcstr/elem_len; i++) {
  *--cstr = '\0';
  for (j=1; j<elem_len; j++) *--cstr = *--fstr;
} return cstr; }

/* kill the trailing char t's in string s. */
#ifndef __CF__KnR
static char *kill_trailing(char *s, char t)
#else
static char *kill_trailing(      s,      t) char *s; char t;
#endif
{char *e; 
e = s + strlen(s);
if (e>s) {                           /* Need this to handle NULL string.*/
  while (e>s && *--e==t);            /* Don't follow t's past beginning. */
  e[*e==t?0:1] = '\0';               /* Handle s[0]=t correctly.       */
} return s; }

/* kill_trailingn(s,t,e) will kill the trailing t's in string s. e normally 
points to the terminating '\0' of s, but may actually point to anywhere in s.
s's new '\0' will be placed at e or earlier in order to remove any trailing t's.
If e<s string s is left unchanged. */ 
#ifndef __CF__KnR
static char *kill_trailingn(char *s, char t, char *e)
#else
static char *kill_trailingn(      s,      t,       e) char *s; char t; char *e;
#endif
{ 
if (e==s) *e = '\0';                 /* Kill the string makes sense here.*/
else if (e>s) {                      /* Watch out for neg. length string.*/
  while (e>s && *--e==t);            /* Don't follow t's past beginning. */
  e[*e==t?0:1] = '\0';               /* Handle s[0]=t correctly.       */
} return s; }

/* Note the following assumes that any element which has t's to be chopped off,
does indeed fill the entire element. */
#ifndef __CF__KnR
static char *vkill_trailing(char* cstr, int elem_len, int sizeofcstr, char t)
#else
static char *vkill_trailing(      cstr,     elem_len,     sizeofcstr,      t)
                            char* cstr; int elem_len; int sizeofcstr; char t;
#endif
{ int i;
for (i=0; i<sizeofcstr/elem_len; i++) /* elem_len includes \0 for C strings. */
  kill_trailingn(cstr+elem_len*i,t,cstr+elem_len*(i+1)-1);
return cstr; }

#ifdef vmsFortran
typedef struct dsc$descriptor_s fstring;
#define DSC$DESCRIPTOR_A(DIMCT)  		                               \
struct {                                                                       \
  unsigned short dsc$w_length;	        unsigned char	 dsc$b_dtype;	       \
  unsigned char	 dsc$b_class;	                 char	*dsc$a_pointer;	       \
           char	 dsc$b_scale;	        unsigned char	 dsc$b_digits;         \
  struct {                                                                     \
    unsigned		       : 3;	  unsigned dsc$v_fl_binscale : 1;      \
    unsigned dsc$v_fl_redim    : 1;       unsigned dsc$v_fl_column   : 1;      \
    unsigned dsc$v_fl_coeff    : 1;       unsigned dsc$v_fl_bounds   : 1;      \
  } dsc$b_aflags;	                                                       \
  unsigned char	 dsc$b_dimct;	        unsigned long	 dsc$l_arsize;	       \
           char	*dsc$a_a0;	                 long	 dsc$l_m [DIMCT];      \
  struct {                                                                     \
    long dsc$l_l;                         long dsc$l_u;                        \
  } dsc$bounds [DIMCT];                                                        \
}