gcc/fortran/misc.c

   1 /* Miscellaneous stuff that doesn't fit anywhere else.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4    Contributed by Andy Vaught
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "gfortran.h"
  25
  26 /* Get a block of memory.  Many callers assume that the memory we
  27    return is zeroed.  */
  28
  29 void *
  30 gfc_getmem (size_t n)
  31 {
  32   void *p;
  33
  34   if (n == 0)
  35     return NULL;
  36
  37   p = xmalloc (n);
  38   if (p == NULL)
  39     gfc_fatal_error ("Out of memory-- malloc() failed");
  40   memset (p, 0, n);
  41   return p;
  42 }
  43
  44
  45 void
  46 gfc_free (void *p)
  47 {
  48   /* The parentheses around free are needed in order to call not
  49      the redefined free of gfortran.h.  */
  50   if (p != NULL)
  51     (free) (p);
  52 }
  53
  54
  55 /* Get terminal width.  */
  56
  57 int
  58 gfc_terminal_width (void)
  59 {
  60   return 80;
  61 }
  62
  63
  64 /* Initialize a typespec to unknown.  */
  65
  66 void
  67 gfc_clear_ts (gfc_typespec *ts)
  68 {
  69   ts->type = BT_UNKNOWN;
  70   ts->derived = NULL;
  71   ts->kind = 0;
  72   ts->cl = NULL;
  73   ts->interface = NULL;
  74   /* flag that says if the type is C interoperable */
  75   ts->is_c_interop = 0;
  76   /* says what f90 type the C kind interops with */
  77   ts->f90_type = BT_UNKNOWN;
  78   /* flag that says whether it's from iso_c_binding or not */
  79   ts->is_iso_c = 0;
  80 }
  81
  82
  83 /* Open a file for reading.  */
  84
  85 FILE *
  86 gfc_open_file (const char *name)
  87 {
  88   struct stat statbuf;
  89
  90   if (!*name)
  91     return stdin;
  92
  93   if (stat (name, &statbuf) < 0)
  94     return NULL;
  95
  96   if (!S_ISREG (statbuf.st_mode))
  97     return NULL;
  98
  99   return fopen (name, "r");
 100 }
 101
 102
 103 /* Return a string for each type.  */
 104
 105 const char *
 106 gfc_basic_typename (bt type)
 107 {
 108   const char *p;
 109
 110   switch (type)
 111     {
 112     case BT_INTEGER:
 113       p = "INTEGER";
 114       break;
 115     case BT_REAL:
 116       p = "REAL";
 117       break;
 118     case BT_COMPLEX:
 119       p = "COMPLEX";
 120       break;
 121     case BT_LOGICAL:
 122       p = "LOGICAL";
 123       break;
 124     case BT_CHARACTER:
 125       p = "CHARACTER";
 126       break;
 127     case BT_HOLLERITH:
 128       p = "HOLLERITH";
 129       break;
 130     case BT_DERIVED:
 131       p = "DERIVED";
 132       break;
 133     case BT_PROCEDURE:
 134       p = "PROCEDURE";
 135       break;
 136     case BT_VOID:
 137       p = "VOID";
 138       break;
 139     case BT_UNKNOWN:
 140       p = "UNKNOWN";
 141       break;
 142     default:
 143       gfc_internal_error ("gfc_basic_typename(): Undefined type");
 144     }
 145
 146   return p;
 147 }
 148
 149
 150 /* Return a string describing the type and kind of a typespec.  Because
 151    we return alternating buffers, this subroutine can appear twice in
 152    the argument list of a single statement.  */
 153
 154 const char *
 155 gfc_typename (gfc_typespec *ts)
 156 {
 157   static char buffer1[GFC_MAX_SYMBOL_LEN + 7];  /* 7 for "TYPE()" + '\0'.  */
 158   static char buffer2[GFC_MAX_SYMBOL_LEN + 7];
 159   static int flag = 0;
 160   char *buffer;
 161
 162   buffer = flag ? buffer1 : buffer2;
 163   flag = !flag;
 164
 165   switch (ts->type)
 166     {
 167     case BT_INTEGER:
 168       sprintf (buffer, "INTEGER(%d)", ts->kind);
 169       break;
 170     case BT_REAL:
 171       sprintf (buffer, "REAL(%d)", ts->kind);
 172       break;
 173     case BT_COMPLEX:
 174       sprintf (buffer, "COMPLEX(%d)", ts->kind);
 175       break;
 176     case BT_LOGICAL:
 177       sprintf (buffer, "LOGICAL(%d)", ts->kind);
 178       break;
 179     case BT_CHARACTER:
 180       sprintf (buffer, "CHARACTER(%d)", ts->kind);
 181       break;
 182     case BT_HOLLERITH:
 183       sprintf (buffer, "HOLLERITH");
 184       break;
 185     case BT_DERIVED:
 186       sprintf (buffer, "TYPE(%s)", ts->derived->name);
 187       break;
 188     case BT_PROCEDURE:
 189       strcpy (buffer, "PROCEDURE");
 190       break;
 191     case BT_UNKNOWN:
 192       strcpy (buffer, "UNKNOWN");
 193       break;
 194     default:
 195       gfc_internal_error ("gfc_typename(): Undefined type");
 196     }
 197
 198   return buffer;
 199 }
 200
 201
 202 /* Given an mstring array and a code, locate the code in the table,
 203    returning a pointer to the string.  */
 204
 205 const char *
 206 gfc_code2string (const mstring *m, int code)
 207 {
 208   while (m->string != NULL)
 209     {
 210       if (m->tag == code)
 211         return m->string;
 212       m++;
 213     }
 214
 215   gfc_internal_error ("gfc_code2string(): Bad code");
 216   /* Not reached */
 217 }
 218
 219
 220 /* Given an mstring array and a string, returns the value of the tag
 221    field.  Returns the final tag if no matches to the string are found.  */
 222
 223 int
 224 gfc_string2code (const mstring *m, const char *string)
 225 {
 226   for (; m->string != NULL; m++)
 227     if (strcmp (m->string, string) == 0)
 228       return m->tag;
 229
 230   return m->tag;
 231 }
 232
 233
 234 /* Convert an intent code to a string.  */
 235 /* TODO: move to gfortran.h as define.  */
 236
 237 const char *
 238 gfc_intent_string (sym_intent i)
 239 {
 240   return gfc_code2string (intents, i);
 241 }
 242
 243
 244 /***************** Initialization functions ****************/
 245
 246 /* Top level initialization.  */
 247
 248 void
 249 gfc_init_1 (void)
 250 {
 251   gfc_error_init_1 ();
 252   gfc_scanner_init_1 ();
 253   gfc_arith_init_1 ();
 254   gfc_intrinsic_init_1 ();
 255 }
 256
 257
 258 /* Per program unit initialization.  */
 259
 260 void
 261 gfc_init_2 (void)
 262 {
 263   gfc_symbol_init_2 ();
 264   gfc_module_init_2 ();
 265 }
 266
 267
 268 /******************* Destructor functions ******************/
 269
 270 /* Call all of the top level destructors.  */
 271
 272 void
 273 gfc_done_1 (void)
 274 {
 275   gfc_scanner_done_1 ();
 276   gfc_intrinsic_done_1 ();
 277   gfc_arith_done_1 ();
 278 }
 279
 280
 281 /* Per program unit destructors.  */
 282
 283 void
 284 gfc_done_2 (void)
 285 {
 286   gfc_symbol_done_2 ();
 287   gfc_module_done_2 ();
 288 }
 289
 290
 291 /* Returns the index into the table of C interoperable kinds where the
 292    kind with the given name (c_kind_name) was found.  */
 293
 294 int
 295 get_c_kind(const char *c_kind_name, CInteropKind_t kinds_table[])
 296 {
 297   int index = 0;
 298
 299   for (index = 0; index < ISOCBINDING_LAST; index++)
 300     if (strcmp (kinds_table[index].name, c_kind_name) == 0)
 301       return index;
 302
 303   return ISOCBINDING_INVALID;
 304 }