gcc/fortran/libgfortran.h

   1 /* Header file to the Fortran front-end and runtime library
   2    Copyright (C) 2007-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* Flags to specify which standard/extension contains a feature.
  22    Note that no features were obsoleted nor deleted in F2003.
  23    Please remember to keep those definitions in sync with
  24    gfortran.texi.  */
  25 /* For now, use F2015 = GFC_STD_GNU.  */
  26 #define GFC_STD_F2015           (1<<5)  /* PLACEHOLDER for Fortran 2015.  */
  27 #define GFC_STD_F2008_TS        (1<<9)  /* POST-F2008 technical reports.  */
  28 #define GFC_STD_F2008_OBS       (1<<8)  /* Obsolescent in F2008.  */
  29 #define GFC_STD_F2008           (1<<7)  /* New in F2008.  */
  30 #define GFC_STD_LEGACY          (1<<6)  /* Backward compatibility.  */
  31 #define GFC_STD_GNU             (1<<5)  /* GNU Fortran extension.  */
  32 #define GFC_STD_F2003           (1<<4)  /* New in F2003.  */
  33 #define GFC_STD_F95             (1<<3)  /* New in F95.  */
  34 #define GFC_STD_F95_DEL         (1<<2)  /* Deleted in F95.  */
  35 #define GFC_STD_F95_OBS         (1<<1)  /* Obsolescent in F95.  */
  36 #define GFC_STD_F77             (1<<0)  /* Included in F77, but not deleted or
  37                                            obsolescent in later standards.  */
  38
  39
  40 /* Bitmasks for the various FPE that can be enabled.  These need to be straight integers
  41    e.g., 8 instead of (1<<3), because they will be included in Fortran source.  */
  42 #define GFC_FPE_INVALID      1
  43 #define GFC_FPE_DENORMAL     2
  44 #define GFC_FPE_ZERO         4
  45 #define GFC_FPE_OVERFLOW     8
  46 #define GFC_FPE_UNDERFLOW   16
  47 #define GFC_FPE_INEXACT     32
  48
  49 /* Defines for floating-point rounding modes.  */
  50 #define GFC_FPE_DOWNWARD   1
  51 #define GFC_FPE_TONEAREST  2
  52 #define GFC_FPE_TOWARDZERO 3
  53 #define GFC_FPE_UPWARD     4
  54
  55 /* Size of the buffer required to store FPU state for any target.
  56    In particular, this has to be larger than fenv_t on all glibc targets.
  57    Currently, the winner is x86_64 with 32 bytes.  */
  58 #define GFC_FPE_STATE_BUFFER_SIZE 32
  59
  60 /* Bitmasks for the various runtime checks that can be enabled.  */
  61 #define GFC_RTCHECK_BOUNDS      (1<<0)
  62 #define GFC_RTCHECK_ARRAY_TEMPS (1<<1)
  63 #define GFC_RTCHECK_RECURSION   (1<<2)
  64 #define GFC_RTCHECK_DO          (1<<3)
  65 #define GFC_RTCHECK_POINTER     (1<<4)
  66 #define GFC_RTCHECK_MEM         (1<<5)
  67 #define GFC_RTCHECK_ALL        (GFC_RTCHECK_BOUNDS | GFC_RTCHECK_ARRAY_TEMPS \
  68                                 | GFC_RTCHECK_RECURSION | GFC_RTCHECK_DO \
  69                                 | GFC_RTCHECK_POINTER | GFC_RTCHECK_MEM)
  70
  71 /* Special unit numbers used to convey certain conditions.  Numbers -4
  72    thru -9 available.  NEWUNIT values start at -10.  */
  73 #define GFC_INTERNAL_UNIT  -1    /* KIND=1 Internal Unit.  */
  74 #define GFC_INTERNAL_UNIT4 -2    /* KIND=4 Internal Unit.  */
  75 #define GFC_INVALID_UNIT   -3
  76
  77 /* Possible values for the CONVERT I/O specifier.  */
  78 /* Keep in sync with GFC_FLAG_CONVERT_* in gcc/flags.h.  */
  79 typedef enum
  80 {
  81   GFC_CONVERT_NONE = -1,
  82   GFC_CONVERT_NATIVE = 0,
  83   GFC_CONVERT_SWAP,
  84   GFC_CONVERT_BIG,
  85   GFC_CONVERT_LITTLE
  86 }
  87 unit_convert;
  88
  89
  90 /* Runtime errors.  */
  91 typedef enum
  92 {
  93   LIBERROR_FIRST = -3,          /* Marker for the first error.  */
  94   LIBERROR_EOR = -2,            /* End of record, must be negative.  */
  95   LIBERROR_END = -1,            /* End of file, must be negative.  */
  96   LIBERROR_OK = 0,              /* Indicates success, must be zero.  */
  97   LIBERROR_OS = 5000,           /* OS error, more info in errno.  */
  98   LIBERROR_OPTION_CONFLICT,
  99   LIBERROR_BAD_OPTION,
 100   LIBERROR_MISSING_OPTION,
 101   LIBERROR_ALREADY_OPEN,
 102   LIBERROR_BAD_UNIT,
 103   LIBERROR_FORMAT,
 104   LIBERROR_BAD_ACTION,
 105   LIBERROR_ENDFILE,
 106   LIBERROR_BAD_US,
 107   LIBERROR_READ_VALUE,
 108   LIBERROR_READ_OVERFLOW,
 109   LIBERROR_INTERNAL,
 110   LIBERROR_INTERNAL_UNIT,
 111   LIBERROR_ALLOCATION,
 112   LIBERROR_DIRECT_EOR,
 113   LIBERROR_SHORT_RECORD,
 114   LIBERROR_CORRUPT_FILE,
 115   LIBERROR_INQUIRE_INTERNAL_UNIT, /* Must be different from STAT_STOPPED_IMAGE.  */
 116   LIBERROR_LAST                 /* Not a real error, the last error # + 1.  */
 117 }
 118 libgfortran_error_codes;
 119
 120 /* Must kept in sync with libgfortran/caf/libcaf.h.  */
 121 typedef enum
 122 {
 123   GFC_STAT_UNLOCKED = 0,
 124   GFC_STAT_LOCKED,
 125   GFC_STAT_LOCKED_OTHER_IMAGE,
 126   GFC_STAT_STOPPED_IMAGE = 6000, /* See LIBERROR_INQUIRE_INTERNAL_UNIT above. */
 127   GFC_STAT_FAILED_IMAGE  = 6001
 128 }
 129 libgfortran_stat_codes;
 130
 131 typedef enum
 132 {
 133   GFC_CAF_ATOMIC_ADD = 1,
 134   GFC_CAF_ATOMIC_AND,
 135   GFC_CAF_ATOMIC_OR,
 136   GFC_CAF_ATOMIC_XOR
 137 } libcaf_atomic_codes;
 138
 139
 140 /* For CO_REDUCE.  */
 141 #define GFC_CAF_BYREF      (1<<0)
 142 #define GFC_CAF_HIDDENLEN  (1<<1)
 143 #define GFC_CAF_ARG_VALUE  (1<<2)
 144 #define GFC_CAF_ARG_DESC   (1<<3)
 145
 146
 147 /* Default unit number for preconnected standard input and output.  */
 148 #define GFC_STDIN_UNIT_NUMBER 5
 149 #define GFC_STDOUT_UNIT_NUMBER 6
 150 #define GFC_STDERR_UNIT_NUMBER 0
 151
 152
 153 /* FIXME: Increase to 15 for Fortran 2008. Also needs changes to
 154    GFC_DTYPE_RANK_MASK. See PR 36825.  */
 155 #define GFC_MAX_DIMENSIONS 7
 156
 157 #define GFC_DTYPE_RANK_MASK 0x07
 158 #define GFC_DTYPE_TYPE_SHIFT 3
 159 #define GFC_DTYPE_TYPE_MASK 0x38
 160 #define GFC_DTYPE_SIZE_SHIFT 6
 161
 162 /* Basic types.  BT_VOID is used by ISO C Binding so funcs like c_f_pointer
 163    can take any arg with the pointer attribute as a param.  These are also
 164    used in the run-time library for IO.  */
 165 typedef enum
 166 { BT_UNKNOWN = 0, BT_INTEGER, BT_LOGICAL, BT_REAL, BT_COMPLEX,
 167   BT_DERIVED, BT_CHARACTER, BT_CLASS, BT_PROCEDURE, BT_HOLLERITH, BT_VOID,
 168   BT_ASSUMED, BT_UNION
 169 }
 170 bt;