/* Common declarations for all of libgfor.
   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   Contributed by Paul Brook <paul@nowt.org>, and
   Andy Vaught <andy@xena.eas.asu.edu>

This file is part of the GNU Fortran 95 runtime library (libgfortran).

Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

Libgfortran 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.

You should have received a copy of the GNU Lesser General Public
License along with libgfor; see the file COPYING.LIB.  If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* As a special exception, if you link this library with other files,
   some of which are compiled with GCC, to produce an executable,
   this library does not by itself cause the resulting executable
   to be covered by the GNU General Public License.
   This exception does not however invalidate any other reasons why
   the executable file might be covered by the GNU General Public License.  */


#ifndef LIBGFOR_H
#define LIBGFOR_H

#include <math.h>
#include <stddef.h>

#ifndef M_PI
#define M_PI 3.14159265358979323846264338327
#endif

#include "config.h"
#include "c99_protos.h"

#if HAVE_COMPLEX_H
# include <complex.h>
#else
#define complex __complex__
#endif

#if HAVE_IEEEFP_H
#include <ieeefp.h>
#endif

#if HAVE_STDINT_H
#include <stdint.h>
#endif

#if HAVE_INTTYPES_H
#include <inttypes.h>
#endif

#if !defined(HAVE_STDINT_H) && !defined(HAVE_INTTYPES_H) && defined(TARGET_ILP32)
typedef char int8_t;
typedef short int16_t;
typedef int int32_t;
typedef long long int64_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long long uint64_t;
#endif

#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
typedef off_t gfc_offset;

#ifndef NULL
#define NULL (void *) 0
#endif

#ifndef __GNUC__
#define __attribute__(x)
#endif

/* For a library, a standard prefix is a requirement in order to partition
   the namespace.  IPREFIX is for symbols intended to be internal to the
   library.  */
#define PREFIX(x)	_gfortran_ ## x
#define IPREFIX(x)	_gfortrani_ ## x

/* Magic to rename a symbol at the compiler level.  You continue to refer
   to the symbol as OLD in the source, but it'll be named NEW in the asm.  */
#define sym_rename(old, new) sym_rename1(old, __USER_LABEL_PREFIX__, new)
#define sym_rename1(old, ulp, new) sym_rename2(old, ulp, new)
#define sym_rename2(old, ulp, new) extern __typeof(old) old __asm__(#ulp #new)

/* There are several classifications of routines:

     (1) Symbols used only within the library,
     (2) Symbols to be exported from the library,
     (3) Symbols to be exported from the library, but
	 also used inside the library.

   By telling the compiler about these different classifications we can
   tightly control the interface seen by the user, and get better code
   from the compiler at the same time.

   One of the following should be used immediately after the declaration
   of each symbol:

     internal_proto	Marks a symbol used only within the library,
			and adds IPREFIX to the assembly-level symbol
			name.  The later is important for maintaining
			the namespace partition for the static library.

     export_proto	Marks a symbol to be exported, and adds PREFIX
			to the assembly-level symbol name.

     export_proto_np	Marks a symbol to be exported without adding PREFIX.

     iexport_proto	Marks a function to be exported, but with the 
			understanding that it can be used inside as well.

     iexport_data_proto	Similarly, marks a data symbol to be exported.
			Unfortunately, some systems can't play the hidden
			symbol renaming trick on data symbols, thanks to
			the horribleness of COPY relocations.

   If iexport_proto or iexport_data_proto is used, you must also use
   iexport or iexport_data after the *definition* of the symbol.  */

#if defined(HAVE_ATTRIBUTE_VISIBILITY)
# define internal_proto(x) \
	sym_rename(x, IPREFIX (x)) __attribute__((__visibility__("hidden")))
#else
# define internal_proto(x)	sym_rename(x, IPREFIX(x))
#endif

#if defined(HAVE_ATTRIBUTE_VISIBILITY) && defined(HAVE_ATTRIBUTE_ALIAS)
# define export_proto(x)	sym_rename(x, PREFIX(x))
# define export_proto_np(x)	extern char swallow_semicolon
# define iexport_proto(x)	internal_proto(x)
# define iexport(x)		iexport1(x, __USER_LABEL_PREFIX__, IPREFIX(x))
# define iexport1(x,p,y)	iexport2(x,p,y)
# define iexport2(x,p,y) \
	extern __typeof(x) PREFIX(x) __attribute__((__alias__(#p #y)))
/* ??? We're not currently building a dll, and it's wrong to add dllexport
   to objects going into a static library archive.  */
#elif 0 && defined(HAVE_ATTRIBUTE_DLLEXPORT)
# define export_proto_np(x)	extern __typeof(x) x __attribute__((dllexport))
# define export_proto(x)    sym_rename(x, PREFIX(x)) __attribute__((dllexport))
# define iexport_proto(x)	export_proto(x)
# define iexport(x)		extern char swallow_semicolon
#else
# define export_proto(x)	sym_rename(x, PREFIX(x))
# define export_proto_np(x)	extern char swallow_semicolon
# define iexport_proto(x)	export_proto(x)
# define iexport(x)		extern char swallow_semicolon
#endif

/* TODO: detect the case when we *can* hide the symbol.  */
#define iexport_data_proto(x)	export_proto(x)
#define iexport_data(x)		extern char swallow_semicolon

/* The only reliable way to get the offset of a field in a struct
   in a system independent way is via this macro.  */
#ifndef offsetof
#define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
#endif

/* The isfinite macro is only available with C99, but some non-C99
   systems still provide fpclassify, and there is a `finite' function
   in BSD.

   Also, isfinite is broken on Cygwin.

   When isfinite is not available, try to use one of the
   alternatives, or bail out.  */
#if (!defined(isfinite) || defined(__CYGWIN__))
#undef isfinite
static inline int
isfinite (double x)
{
#if defined(fpclassify)
  return (fpclassify(x) != FP_NAN && fpclassify(x) != FP_INFINITE);
#elif defined(HAVE_FINITE)
  return finite (x);
#else
#error "libgfortran needs isfinite, fpclassify, or finite"
#endif
}
#endif /* !defined(isfinite)  */

/* TODO: find the C99 version of these an move into above ifdef.  */
#define REALPART(z) (__real__(z))
#define IMAGPART(z) (__imag__(z))
#define COMPLEX_ASSIGN(z_, r_, i_) {__real__(z_) = (r_); __imag__(z_) = (i_);}

typedef int8_t GFC_INTEGER_1;
typedef int16_t GFC_INTEGER_2;
typedef int32_t GFC_INTEGER_4;
typedef int64_t GFC_INTEGER_8;
typedef uint8_t GFC_UINTEGER_1;
typedef uint16_t GFC_UINTEGER_2;
typedef uint32_t GFC_UINTEGER_4;
typedef uint64_t GFC_UINTEGER_8;
typedef GFC_INTEGER_4 GFC_LOGICAL_4;
typedef GFC_INTEGER_8 GFC_LOGICAL_8;
typedef float GFC_REAL_4;
typedef double GFC_REAL_8;
typedef complex float GFC_COMPLEX_4;
typedef complex double GFC_COMPLEX_8;

/* The following two definitions must be consistent with the types used
   by the compiler.  */
/* The type used of array indices, amongst other things.  */
typedef ssize_t index_type;
/* The type used for the lengths of character variables.  */
typedef GFC_INTEGER_4 gfc_charlen_type;

/* This will be 0 on little-endian machines and one on big-endian machines.  */
extern int l8_to_l4_offset;
internal_proto(l8_to_l4_offset);

#define GFOR_POINTER_L8_TO_L4(p8) \
  (l8_to_l4_offset + (GFC_LOGICAL_4 *)(p8))

#define GFC_INTEGER_4_HUGE \
  (GFC_INTEGER_4)((((GFC_UINTEGER_4)1) << 31) - 1)
#define GFC_INTEGER_8_HUGE \
  (GFC_INTEGER_8)((((GFC_UINTEGER_8)1) << 63) - 1)
#define GFC_REAL_4_HUGE FLT_MAX
#define GFC_REAL_8_HUGE DBL_MAX

#ifndef GFC_MAX_DIMENSIONS
#define GFC_MAX_DIMENSIONS 7
#endif

typedef struct descriptor_dimension
{
  index_type stride;
  index_type lbound;
  index_type ubound;
}
descriptor_dimension;

#define GFC_ARRAY_DESCRIPTOR(r, type) \
struct {\
  type *data;\
  type *base;\
  index_type dtype;\
  descriptor_dimension dim[r];\
}

/* Commonly used array descriptor types.  */
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, void) gfc_array_void;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, char) gfc_array_char;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_INTEGER_4) gfc_array_i4;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_INTEGER_8) gfc_array_i8;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_REAL_4) gfc_array_r4;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_REAL_8) gfc_array_r8;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_COMPLEX_4) gfc_array_c4;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_COMPLEX_8) gfc_array_c8;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_LOGICAL_4) gfc_array_l4;
typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, GFC_LOGICAL_8) gfc_array_l8;

#define GFC_DTYPE_RANK_MASK 0x07
#define GFC_DTYPE_TYPE_SHIFT 3
#define GFC_DTYPE_TYPE_MASK 0x38
#define GFC_DTYPE_SIZE_SHIFT 6

enum
{
  GFC_DTYPE_UNKNOWN = 0,
  GFC_DTYPE_INTEGER,
  /* TODO: recognize logical types.  */
  GFC_DTYPE_LOGICAL,
  GFC_DTYPE_REAL,
  GFC_DTYPE_COMPLEX,
  GFC_DTYPE_DERIVED,
  GFC_DTYPE_CHARACTER
};

#define GFC_DESCRIPTOR_RANK(desc) ((desc)->dtype & GFC_DTYPE_RANK_MASK)
#define GFC_DESCRIPTOR_TYPE(desc) (((desc)->dtype & GFC_DTYPE_TYPE_MASK) \
                                   >> GFC_DTYPE_TYPE_SHIFT)
#define GFC_DESCRIPTOR_SIZE(desc) ((desc)->dtype >> GFC_DTYPE_SIZE_SHIFT)
#define GFC_DESCRIPTOR_DATA(desc) ((desc)->data)
#define GFC_DESCRIPTOR_DTYPE(desc) ((desc)->dtype)

/* Runtime library include.  */
#define stringize(x) expand_macro(x)
#define expand_macro(x) # x

/* Runtime options structure.  */

typedef struct
{
  int stdin_unit, stdout_unit, stderr_unit, optional_plus;
  int allocate_init_flag, allocate_init_value;
  int locus;

  int separator_len;
  const char *separator;

  int mem_check;
  int use_stderr, all_unbuffered, default_recl;

  int fpu_round, fpu_precision, fpu_invalid, fpu_denormal, fpu_zerodiv,
    fpu_overflow, fpu_underflow, fpu_precision_loss;

  int sighup, sigint;
}
options_t;


extern options_t options;
internal_proto(options);


/* Structure for statement options.  */

typedef struct
{
  const char *name;
  int value;
}
st_option;

/* Runtime errors.  The EOR and EOF errors are required to be negative.  */

typedef enum
{
  ERROR_FIRST = -3,		/* Marker for the first error.  */
  ERROR_EOR = -2,
  ERROR_END = -1,
  ERROR_OK = 0,			/* Indicates success, must be zero.  */
  ERROR_OS,			/* Operating system error, more info in errno.  */
  ERROR_OPTION_CONFLICT,
  ERROR_BAD_OPTION,
  ERROR_MISSING_OPTION,
  ERROR_ALREADY_OPEN,
  ERROR_BAD_UNIT,
  ERROR_FORMAT,
  ERROR_BAD_ACTION,
  ERROR_ENDFILE,
  ERROR_BAD_US,
  ERROR_READ_VALUE,
  ERROR_READ_OVERFLOW,
  ERROR_LAST			/* Not a real error, the last error # + 1.  */
}
error_codes;


/* The filename and line number don't go inside the globals structure.
   They are set by the rest of the program and must be linked to.  */

/* Location of the current library call (optional).  */
extern unsigned line;
iexport_data_proto(line);

extern char *filename;
iexport_data_proto(filename);

/* Avoid conflicting prototypes of alloca() in system headers by using 
   GCC's builtin alloca().  */
#define gfc_alloca(x)  __builtin_alloca(x)


/* main.c */

extern void library_start (void);
internal_proto(library_start);

extern void library_end (void);
internal_proto(library_end);

extern void set_args (int, char **);
export_proto(set_args);

extern void get_args (int *, char ***);
internal_proto(get_args);

/* error.c */

extern char *gfc_itoa (int64_t);
internal_proto(gfc_itoa);

extern char *xtoa (uint64_t);
internal_proto(xtoa);

extern void os_error (const char *) __attribute__ ((noreturn));
internal_proto(os_error);

extern void show_locus (void);
internal_proto(show_locus);

extern void runtime_error (const char *) __attribute__ ((noreturn));
iexport_proto(runtime_error);

extern void internal_error (const char *) __attribute__ ((noreturn));
internal_proto(internal_error);

extern const char *get_oserror (void);
internal_proto(get_oserror);

extern void sys_exit (int) __attribute__ ((noreturn));
internal_proto(sys_exit);

extern int st_printf (const char *, ...)
  __attribute__ ((format (printf, 1, 2)));
internal_proto(st_printf);

extern void st_sprintf (char *, const char *, ...)
  __attribute__ ((format (printf, 2, 3)));
internal_proto(st_sprintf);

extern const char *translate_error (int);
internal_proto(translate_error);

extern void generate_error (int, const char *);
internal_proto(generate_error);

/* memory.c */

extern void *get_mem (size_t) __attribute__ ((malloc));
internal_proto(get_mem);

extern void free_mem (void *);
internal_proto(free_mem);

extern void *internal_malloc_size (size_t);
internal_proto(internal_malloc_size);

extern void internal_free (void *);
iexport_proto(internal_free);

/* environ.c */

extern int check_buffered (int);
internal_proto(check_buffered);

extern void init_variables (void);
internal_proto(init_variables);

extern void show_variables (void);
internal_proto(show_variables);

/* string.c */

extern int find_option (const char *, int, st_option *, const char *);
internal_proto(find_option);

extern int fstrlen (const char *, int);
internal_proto(fstrlen);

extern void fstrcpy (char *, int, const char *, int);
internal_proto(fstrcpy);

extern void cf_strcpy (char *, int, const char *);
internal_proto(cf_strcpy);

/* io.c */

extern void init_units (void);
internal_proto(init_units);

extern void close_units (void);
internal_proto(close_units);

/* stop.c */

extern void stop_numeric (GFC_INTEGER_4);
iexport_proto(stop_numeric);

/* reshape_packed.c */

extern void reshape_packed (char *, index_type, const char *, index_type,
			    const char *, index_type);
internal_proto(reshape_packed);

/* Repacking functions.  */

/* ??? These four aren't currently used by the compiler, though we
   certainly could do so.  */
GFC_INTEGER_4 *internal_pack_4 (gfc_array_i4 *);
internal_proto(internal_pack_4);

GFC_INTEGER_8 *internal_pack_8 (gfc_array_i8 *);
internal_proto(internal_pack_8);

extern void internal_unpack_4 (gfc_array_i4 *, const GFC_INTEGER_4 *);
internal_proto(internal_unpack_4);

extern void internal_unpack_8 (gfc_array_i8 *, const GFC_INTEGER_8 *);
internal_proto(internal_unpack_8);

/* string_intrinsics.c */

extern GFC_INTEGER_4 compare_string (GFC_INTEGER_4, const char *,
				     GFC_INTEGER_4, const char *);
iexport_proto(compare_string);

/* random.c */

extern void random_seed (GFC_INTEGER_4 * size, gfc_array_i4 * put,
			 gfc_array_i4 * get);
iexport_proto(random_seed);

/* normalize.c */

extern GFC_REAL_4 normalize_r4_i4 (GFC_UINTEGER_4, GFC_UINTEGER_4);
internal_proto(normalize_r4_i4);

extern GFC_REAL_8 normalize_r8_i8 (GFC_UINTEGER_8, GFC_UINTEGER_8);
internal_proto(normalize_r8_i8);

/* size.c */

typedef GFC_ARRAY_DESCRIPTOR (GFC_MAX_DIMENSIONS, void) array_t;

extern index_type size0 (const array_t * array); 
iexport_proto(size0);

#endif  /* LIBGFOR_H  */