gcc/fortran/misc.c

   1 /* Miscellaneous stuff that doesn't fit anywhere else.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   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 2, 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 COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "gfortran.h"
  26
  27 /* Get a block of memory.  Many callers assume that the memory we
  28    return is zeroed.  */
  29
  30 void *
  31 gfc_getmem (size_t n)
  32 {
  33   void *p;
  34
  35   if (n == 0)
  36     return NULL;
  37
  38   p = xmalloc (n);
  39   if (p == NULL)
  40     gfc_fatal_error ("Out of memory-- malloc() failed");
  41   memset (p, 0, n);
  42   return p;
  43 }
  44
  45
  46 /* gfortran.h defines free to something that triggers a syntax error,
  47    but we need free() here.  */
  48
  49 #define temp free
  50 #undef free
  51
  52 void
  53 gfc_free (void *p)
  54 {
  55   if (p != NULL)
  56     free (p);
  57 }
  58
  59 #define free temp
  60 #undef temp
  61
  62
  63 /* Get terminal width.  */
  64
  65 int
  66 gfc_terminal_width (void)
  67 {
  68   return 80;
  69 }
  70
  71
  72 /* Initialize a typespec to unknown.  */
  73
  74 void
  75 gfc_clear_ts (gfc_typespec *ts)
  76 {
  77   ts->type = BT_UNKNOWN;
  78   ts->kind = 0;
  79   ts->derived = NULL;
  80   ts->cl = NULL;
  81   /* flag that says if the type is C interoperable */
  82   ts->is_c_interop = 0;
  83   /* says what f90 type the C kind interops with */
  84   ts->f90_type = BT_UNKNOWN;
  85   /* flag that says whether it's from iso_c_binding or not */
  86   ts->is_iso_c = 0;
  87 }
  88
  89
  90 /* Open a file for reading.  */
  91
  92 FILE *
  93 gfc_open_file (const char *name)
  94 {
  95   struct stat statbuf;
  96
  97   if (!*name)
  98     return stdin;
  99
 100   if (stat (name, &statbuf) < 0)
 101     return NULL;
 102
 103   if (!S_ISREG (statbuf.st_mode))
 104     return NULL;
 105
 106   return fopen (name, "r");
 107 }
 108
 109
 110 /* Return a string for each type.  */
 111
 112 const char *
 113 gfc_basic_typename (bt type)
 114 {
 115   const char *p;
 116
 117   switch (type)
 118     {
 119     case BT_INTEGER:
 120       p = "INTEGER";
 121       break;
 122     case BT_REAL:
 123       p = "REAL";
 124       break;
 125     case BT_COMPLEX:
 126       p = "COMPLEX";
 127       break;
 128     case BT_LOGICAL:
 129       p = "LOGICAL";
 130       break;
 131     case BT_CHARACTER:
 132       p = "CHARACTER";
 133       break;
 134     case BT_HOLLERITH:
 135       p = "HOLLERITH";
 136       break;
 137     case BT_DERIVED:
 138       p = "DERIVED";
 139       break;
 140     case BT_PROCEDURE:
 141       p = "PROCEDURE";
 142       break;
 143     case BT_UNKNOWN:
 144       p = "UNKNOWN";
 145       break;
 146     default:
 147       gfc_internal_error ("gfc_basic_typename(): Undefined type");
 148     }
 149
 150   return p;
 151 }
 152
 153
 154 /* Return a string describing the type and kind of a typespec.  Because
 155    we return alternating buffers, this subroutine can appear twice in
 156    the argument list of a single statement.  */
 157
 158 const char *
 159 gfc_typename (gfc_typespec *ts)
 160 {
 161   static char buffer1[GFC_MAX_SYMBOL_LEN + 7];  /* 7 for "TYPE()" + '\0'.  */
 162   static char buffer2[GFC_MAX_SYMBOL_LEN + 7];
 163   static int flag = 0;
 164   char *buffer;
 165
 166   buffer = flag ? buffer1 : buffer2;
 167   flag = !flag;
 168
 169   switch (ts->type)
 170     {
 171     case BT_INTEGER:
 172       sprintf (buffer, "INTEGER(%d)", ts->kind);
 173       break;
 174     case BT_REAL:
 175       sprintf (buffer, "REAL(%d)", ts->kind);
 176       break;
 177     case BT_COMPLEX:
 178       sprintf (buffer, "COMPLEX(%d)", ts->kind);
 179       break;
 180     case BT_LOGICAL:
 181       sprintf (buffer, "LOGICAL(%d)", ts->kind);
 182       break;
 183     case BT_CHARACTER:
 184       sprintf (buffer, "CHARACTER(%d)", ts->kind);
 185       break;
 186     case BT_HOLLERITH:
 187       sprintf (buffer, "HOLLERITH");
 188       break;
 189     case BT_DERIVED:
 190       sprintf (buffer, "TYPE(%s)", ts->derived->name);
 191       break;
 192     case BT_PROCEDURE:
 193       strcpy (buffer, "PROCEDURE");
 194       break;
 195     case BT_UNKNOWN:
 196       strcpy (buffer, "UNKNOWN");
 197       break;
 198     default:
 199       gfc_internal_error ("gfc_typename(): Undefined type");
 200     }
 201
 202   return buffer;
 203 }
 204
 205
 206 /* Given an mstring array and a code, locate the code in the table,
 207    returning a pointer to the string.  */
 208
 209 const char *
 210 gfc_code2string (const mstring *m, int code)
 211 {
 212   while (m->string != NULL)
 213     {
 214       if (m->tag == code)
 215         return m->string;
 216       m++;
 217     }
 218
 219   gfc_internal_error ("gfc_code2string(): Bad code");
 220   /* Not reached */
 221 }
 222
 223
 224 /* Given an mstring array and a string, returns the value of the tag
 225    field.  Returns the final tag if no matches to the string are found.  */
 226
 227 int
 228 gfc_string2code (const mstring *m, const char *string)
 229 {
 230   for (; m->string != NULL; m++)
 231     if (strcmp (m->string, string) == 0)
 232       return m->tag;
 233
 234   return m->tag;
 235 }
 236
 237
 238 /* Convert an intent code to a string.  */
 239 /* TODO: move to gfortran.h as define.  */
 240
 241 const char *
 242 gfc_intent_string (sym_intent i)
 243 {
 244   return gfc_code2string (intents, i);
 245 }
 246
 247
 248 /***************** Initialization functions ****************/
 249
 250 /* Top level initialization.  */
 251
 252 void
 253 gfc_init_1 (void)
 254 {
 255   gfc_error_init_1 ();
 256   gfc_scanner_init_1 ();
 257   gfc_arith_init_1 ();
 258   gfc_intrinsic_init_1 ();
 259 }
 260
 261
 262 /* Per program unit initialization.  */
 263
 264 void
 265 gfc_init_2 (void)
 266 {
 267   gfc_symbol_init_2 ();
 268   gfc_module_init_2 ();
 269 }
 270
 271
 272 /******************* Destructor functions ******************/
 273
 274 /* Call all of the top level destructors.  */
 275
 276 void
 277 gfc_done_1 (void)
 278 {
 279   gfc_scanner_done_1 ();
 280   gfc_intrinsic_done_1 ();
 281   gfc_arith_done_1 ();
 282 }
 283
 284
 285 /* Per program unit destructors.  */
 286
 287 void
 288 gfc_done_2 (void)
 289 {
 290   gfc_symbol_done_2 ();
 291   gfc_module_done_2 ();
 292 }
 293
 294
 295 /* Returns the index into the table of C interoperable kinds where the
 296    kind with the given name (c_kind_name) was found.  */
 297
 298 int
 299 get_c_kind(const char *c_kind_name, CInteropKind_t kinds_table[])
 300 {
 301   int index = 0;
 302
 303   for (index = 0; index < ISOCBINDING_LAST; index++)
 304     if (strcmp (kinds_table[index].name, c_kind_name) == 0)
 305       return index;
 306
 307   return ISOCBINDING_INVALID;
 308 }