1 /* Handle modules, which amounts to loading and saving symbols and
2 their attendant structures.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Andy Vaught
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
23 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
24 sequence of atoms, which can be left or right parenthesis, names,
25 integers or strings. Parenthesis are always matched which allows
26 us to skip over sections at high speed without having to know
27 anything about the internal structure of the lists. A "name" is
28 usually a fortran 95 identifier, but can also start with '@' in
29 order to reference a hidden symbol.
31 The first line of a module is an informational message about what
32 created the module, the file it came from and when it was created.
33 The second line is a warning for people not to edit the module.
34 The rest of the module looks like:
36 ( ( <Interface info for UPLUS> )
37 ( <Interface info for UMINUS> )
40 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
43 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
46 ( ( <common name> <symbol> <saved flag>)
52 ( <Symbol Number (in no particular order)>
54 <Module name of symbol>
55 ( <symbol information> )
64 In general, symbols refer to other symbols by their symbol number,
65 which are zero based. Symbols are written to the module in no
73 #include "parse.h" /* FIXME */
76 #define MODULE_EXTENSION ".mod"
78 /* Don't put any single quote (') in MOD_VERSION,
79 if yout want it to be recognized. */
80 #define MOD_VERSION "2"
83 /* Structure that describes a position within a module file. */
92 /* Structure for list of symbols of intrinsic modules. */
105 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
109 /* The fixup structure lists pointers to pointers that have to
110 be updated when a pointer value becomes known. */
112 typedef struct fixup_t
115 struct fixup_t *next;
120 /* Structure for holding extra info needed for pointers being read. */
136 typedef struct pointer_info
138 BBT_HEADER (pointer_info);
142 /* The first component of each member of the union is the pointer
149 void *pointer; /* Member for doing pointer searches. */
154 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
155 enum gfc_rsym_state state;
156 int ns, referenced, renamed;
159 gfc_symtree *symtree;
160 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
167 enum gfc_wsym_state state;
176 #define gfc_get_pointer_info() XCNEW (pointer_info)
179 /* Local variables */
181 /* The FILE for the module we're reading or writing. */
182 static FILE *module_fp;
184 /* MD5 context structure. */
185 static struct md5_ctx ctx;
187 /* The name of the module we're reading (USE'ing) or writing. */
188 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
190 /* The way the module we're reading was specified. */
191 static bool specified_nonint, specified_int;
193 static int module_line, module_column, only_flag;
195 { IO_INPUT, IO_OUTPUT }
198 static gfc_use_rename *gfc_rename_list;
199 static pointer_info *pi_root;
200 static int symbol_number; /* Counter for assigning symbol numbers */
202 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
203 static bool in_load_equiv;
205 static locus use_locus;
209 /*****************************************************************/
211 /* Pointer/integer conversion. Pointers between structures are stored
212 as integers in the module file. The next couple of subroutines
213 handle this translation for reading and writing. */
215 /* Recursively free the tree of pointer structures. */
218 free_pi_tree (pointer_info *p)
223 if (p->fixup != NULL)
224 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
226 free_pi_tree (p->left);
227 free_pi_tree (p->right);
233 /* Compare pointers when searching by pointer. Used when writing a
237 compare_pointers (void *_sn1, void *_sn2)
239 pointer_info *sn1, *sn2;
241 sn1 = (pointer_info *) _sn1;
242 sn2 = (pointer_info *) _sn2;
244 if (sn1->u.pointer < sn2->u.pointer)
246 if (sn1->u.pointer > sn2->u.pointer)
253 /* Compare integers when searching by integer. Used when reading a
257 compare_integers (void *_sn1, void *_sn2)
259 pointer_info *sn1, *sn2;
261 sn1 = (pointer_info *) _sn1;
262 sn2 = (pointer_info *) _sn2;
264 if (sn1->integer < sn2->integer)
266 if (sn1->integer > sn2->integer)
273 /* Initialize the pointer_info tree. */
282 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
284 /* Pointer 0 is the NULL pointer. */
285 p = gfc_get_pointer_info ();
290 gfc_insert_bbt (&pi_root, p, compare);
292 /* Pointer 1 is the current namespace. */
293 p = gfc_get_pointer_info ();
294 p->u.pointer = gfc_current_ns;
296 p->type = P_NAMESPACE;
298 gfc_insert_bbt (&pi_root, p, compare);
304 /* During module writing, call here with a pointer to something,
305 returning the pointer_info node. */
307 static pointer_info *
308 find_pointer (void *gp)
315 if (p->u.pointer == gp)
317 p = (gp < p->u.pointer) ? p->left : p->right;
324 /* Given a pointer while writing, returns the pointer_info tree node,
325 creating it if it doesn't exist. */
327 static pointer_info *
328 get_pointer (void *gp)
332 p = find_pointer (gp);
336 /* Pointer doesn't have an integer. Give it one. */
337 p = gfc_get_pointer_info ();
340 p->integer = symbol_number++;
342 gfc_insert_bbt (&pi_root, p, compare_pointers);
348 /* Given an integer during reading, find it in the pointer_info tree,
349 creating the node if not found. */
351 static pointer_info *
352 get_integer (int integer)
362 c = compare_integers (&t, p);
366 p = (c < 0) ? p->left : p->right;
372 p = gfc_get_pointer_info ();
373 p->integer = integer;
376 gfc_insert_bbt (&pi_root, p, compare_integers);
382 /* Recursive function to find a pointer within a tree by brute force. */
384 static pointer_info *
385 fp2 (pointer_info *p, const void *target)
392 if (p->u.pointer == target)
395 q = fp2 (p->left, target);
399 return fp2 (p->right, target);
403 /* During reading, find a pointer_info node from the pointer value.
404 This amounts to a brute-force search. */
406 static pointer_info *
407 find_pointer2 (void *p)
409 return fp2 (pi_root, p);
413 /* Resolve any fixups using a known pointer. */
416 resolve_fixups (fixup_t *f, void *gp)
429 /* Call here during module reading when we know what pointer to
430 associate with an integer. Any fixups that exist are resolved at
434 associate_integer_pointer (pointer_info *p, void *gp)
436 if (p->u.pointer != NULL)
437 gfc_internal_error ("associate_integer_pointer(): Already associated");
441 resolve_fixups (p->fixup, gp);
447 /* During module reading, given an integer and a pointer to a pointer,
448 either store the pointer from an already-known value or create a
449 fixup structure in order to store things later. Returns zero if
450 the reference has been actually stored, or nonzero if the reference
451 must be fixed later (i.e., associate_integer_pointer must be called
452 sometime later. Returns the pointer_info structure. */
454 static pointer_info *
455 add_fixup (int integer, void *gp)
461 p = get_integer (integer);
463 if (p->integer == 0 || p->u.pointer != NULL)
466 *cp = (char *) p->u.pointer;
475 f->pointer = (void **) gp;
482 /*****************************************************************/
484 /* Parser related subroutines */
486 /* Free the rename list left behind by a USE statement. */
491 gfc_use_rename *next;
493 for (; gfc_rename_list; gfc_rename_list = next)
495 next = gfc_rename_list->next;
496 gfc_free (gfc_rename_list);
501 /* Match a USE statement. */
506 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
507 gfc_use_rename *tail = NULL, *new_use;
508 interface_type type, type2;
512 specified_int = false;
513 specified_nonint = false;
515 if (gfc_match (" , ") == MATCH_YES)
517 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
519 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
520 "nature in USE statement at %C") == FAILURE)
523 if (strcmp (module_nature, "intrinsic") == 0)
524 specified_int = true;
527 if (strcmp (module_nature, "non_intrinsic") == 0)
528 specified_nonint = true;
531 gfc_error ("Module nature in USE statement at %C shall "
532 "be either INTRINSIC or NON_INTRINSIC");
539 /* Help output a better error message than "Unclassifiable
541 gfc_match (" %n", module_nature);
542 if (strcmp (module_nature, "intrinsic") == 0
543 || strcmp (module_nature, "non_intrinsic") == 0)
544 gfc_error ("\"::\" was expected after module nature at %C "
545 "but was not found");
551 m = gfc_match (" ::");
552 if (m == MATCH_YES &&
553 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
554 "\"USE :: module\" at %C") == FAILURE)
559 m = gfc_match ("% ");
565 use_locus = gfc_current_locus;
567 m = gfc_match_name (module_name);
574 if (gfc_match_eos () == MATCH_YES)
576 if (gfc_match_char (',') != MATCH_YES)
579 if (gfc_match (" only :") == MATCH_YES)
582 if (gfc_match_eos () == MATCH_YES)
587 /* Get a new rename struct and add it to the rename list. */
588 new_use = gfc_get_use_rename ();
589 new_use->where = gfc_current_locus;
592 if (gfc_rename_list == NULL)
593 gfc_rename_list = new_use;
595 tail->next = new_use;
598 /* See what kind of interface we're dealing with. Assume it is
600 new_use->op = INTRINSIC_NONE;
601 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
606 case INTERFACE_NAMELESS:
607 gfc_error ("Missing generic specification in USE statement at %C");
610 case INTERFACE_USER_OP:
611 case INTERFACE_GENERIC:
612 m = gfc_match (" =>");
614 if (type == INTERFACE_USER_OP && m == MATCH_YES
615 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
616 "operators in USE statements at %C")
620 if (type == INTERFACE_USER_OP)
621 new_use->op = INTRINSIC_USER;
626 strcpy (new_use->use_name, name);
629 strcpy (new_use->local_name, name);
630 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
635 if (m == MATCH_ERROR)
643 strcpy (new_use->local_name, name);
645 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
650 if (m == MATCH_ERROR)
654 if (strcmp (new_use->use_name, module_name) == 0
655 || strcmp (new_use->local_name, module_name) == 0)
657 gfc_error ("The name '%s' at %C has already been used as "
658 "an external module name.", module_name);
663 case INTERFACE_INTRINSIC_OP:
671 if (gfc_match_eos () == MATCH_YES)
673 if (gfc_match_char (',') != MATCH_YES)
680 gfc_syntax_error (ST_USE);
688 /* Given a name and a number, inst, return the inst name
689 under which to load this symbol. Returns NULL if this
690 symbol shouldn't be loaded. If inst is zero, returns
691 the number of instances of this name. If interface is
692 true, a user-defined operator is sought, otherwise only
693 non-operators are sought. */
696 find_use_name_n (const char *name, int *inst, bool interface)
702 for (u = gfc_rename_list; u; u = u->next)
704 if (strcmp (u->use_name, name) != 0
705 || (u->op == INTRINSIC_USER && !interface)
706 || (u->op != INTRINSIC_USER && interface))
719 return only_flag ? NULL : name;
723 return (u->local_name[0] != '\0') ? u->local_name : name;
727 /* Given a name, return the name under which to load this symbol.
728 Returns NULL if this symbol shouldn't be loaded. */
731 find_use_name (const char *name, bool interface)
734 return find_use_name_n (name, &i, interface);
738 /* Given a real name, return the number of use names associated with it. */
741 number_use_names (const char *name, bool interface)
745 c = find_use_name_n (name, &i, interface);
750 /* Try to find the operator in the current list. */
752 static gfc_use_rename *
753 find_use_operator (gfc_intrinsic_op op)
757 for (u = gfc_rename_list; u; u = u->next)
765 /*****************************************************************/
767 /* The next couple of subroutines maintain a tree used to avoid a
768 brute-force search for a combination of true name and module name.
769 While symtree names, the name that a particular symbol is known by
770 can changed with USE statements, we still have to keep track of the
771 true names to generate the correct reference, and also avoid
772 loading the same real symbol twice in a program unit.
774 When we start reading, the true name tree is built and maintained
775 as symbols are read. The tree is searched as we load new symbols
776 to see if it already exists someplace in the namespace. */
778 typedef struct true_name
780 BBT_HEADER (true_name);
785 static true_name *true_name_root;
788 /* Compare two true_name structures. */
791 compare_true_names (void *_t1, void *_t2)
796 t1 = (true_name *) _t1;
797 t2 = (true_name *) _t2;
799 c = ((t1->sym->module > t2->sym->module)
800 - (t1->sym->module < t2->sym->module));
804 return strcmp (t1->sym->name, t2->sym->name);
808 /* Given a true name, search the true name tree to see if it exists
809 within the main namespace. */
812 find_true_name (const char *name, const char *module)
818 sym.name = gfc_get_string (name);
820 sym.module = gfc_get_string (module);
828 c = compare_true_names ((void *) (&t), (void *) p);
832 p = (c < 0) ? p->left : p->right;
839 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
842 add_true_name (gfc_symbol *sym)
846 t = XCNEW (true_name);
849 gfc_insert_bbt (&true_name_root, t, compare_true_names);
853 /* Recursive function to build the initial true name tree by
854 recursively traversing the current namespace. */
857 build_tnt (gfc_symtree *st)
862 build_tnt (st->left);
863 build_tnt (st->right);
865 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
868 add_true_name (st->n.sym);
872 /* Initialize the true name tree with the current namespace. */
875 init_true_name_tree (void)
877 true_name_root = NULL;
878 build_tnt (gfc_current_ns->sym_root);
882 /* Recursively free a true name tree node. */
885 free_true_name (true_name *t)
889 free_true_name (t->left);
890 free_true_name (t->right);
896 /*****************************************************************/
898 /* Module reading and writing. */
902 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
906 static atom_type last_atom;
909 /* The name buffer must be at least as long as a symbol name. Right
910 now it's not clear how we're going to store numeric constants--
911 probably as a hexadecimal string, since this will allow the exact
912 number to be preserved (this can't be done by a decimal
913 representation). Worry about that later. TODO! */
915 #define MAX_ATOM_SIZE 100
918 static char *atom_string, atom_name[MAX_ATOM_SIZE];
921 /* Report problems with a module. Error reporting is not very
922 elaborate, since this sorts of errors shouldn't really happen.
923 This subroutine never returns. */
925 static void bad_module (const char *) ATTRIBUTE_NORETURN;
928 bad_module (const char *msgid)
935 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
936 module_name, module_line, module_column, msgid);
939 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
940 module_name, module_line, module_column, msgid);
943 gfc_fatal_error ("Module %s at line %d column %d: %s",
944 module_name, module_line, module_column, msgid);
950 /* Set the module's input pointer. */
953 set_module_locus (module_locus *m)
955 module_column = m->column;
956 module_line = m->line;
957 fsetpos (module_fp, &m->pos);
961 /* Get the module's input pointer so that we can restore it later. */
964 get_module_locus (module_locus *m)
966 m->column = module_column;
967 m->line = module_line;
968 fgetpos (module_fp, &m->pos);
972 /* Get the next character in the module, updating our reckoning of
980 c = getc (module_fp);
983 bad_module ("Unexpected EOF");
996 /* Parse a string constant. The delimiter is guaranteed to be a
1006 get_module_locus (&start);
1010 /* See how long the string is. */
1015 bad_module ("Unexpected end of module in string constant");
1033 set_module_locus (&start);
1035 atom_string = p = XCNEWVEC (char, len + 1);
1037 for (; len > 0; len--)
1041 module_char (); /* Guaranteed to be another \'. */
1045 module_char (); /* Terminating \'. */
1046 *p = '\0'; /* C-style string for debug purposes. */
1050 /* Parse a small integer. */
1053 parse_integer (int c)
1061 get_module_locus (&m);
1067 atom_int = 10 * atom_int + c - '0';
1068 if (atom_int > 99999999)
1069 bad_module ("Integer overflow");
1072 set_module_locus (&m);
1090 get_module_locus (&m);
1095 if (!ISALNUM (c) && c != '_' && c != '-')
1099 if (++len > GFC_MAX_SYMBOL_LEN)
1100 bad_module ("Name too long");
1105 fseek (module_fp, -1, SEEK_CUR);
1106 module_column = m.column + len - 1;
1113 /* Read the next atom in the module's input stream. */
1124 while (c == ' ' || c == '\r' || c == '\n');
1149 return ATOM_INTEGER;
1207 bad_module ("Bad name");
1214 /* Peek at the next atom on the input. */
1222 get_module_locus (&m);
1225 if (a == ATOM_STRING)
1226 gfc_free (atom_string);
1228 set_module_locus (&m);
1233 /* Read the next atom from the input, requiring that it be a
1237 require_atom (atom_type type)
1243 get_module_locus (&m);
1251 p = _("Expected name");
1254 p = _("Expected left parenthesis");
1257 p = _("Expected right parenthesis");
1260 p = _("Expected integer");
1263 p = _("Expected string");
1266 gfc_internal_error ("require_atom(): bad atom type required");
1269 set_module_locus (&m);
1275 /* Given a pointer to an mstring array, require that the current input
1276 be one of the strings in the array. We return the enum value. */
1279 find_enum (const mstring *m)
1283 i = gfc_string2code (m, atom_name);
1287 bad_module ("find_enum(): Enum not found");
1293 /**************** Module output subroutines ***************************/
1295 /* Output a character to a module file. */
1298 write_char (char out)
1300 if (putc (out, module_fp) == EOF)
1301 gfc_fatal_error ("Error writing modules file: %s", strerror (errno));
1303 /* Add this to our MD5. */
1304 md5_process_bytes (&out, sizeof (out), &ctx);
1316 /* Write an atom to a module. The line wrapping isn't perfect, but it
1317 should work most of the time. This isn't that big of a deal, since
1318 the file really isn't meant to be read by people anyway. */
1321 write_atom (atom_type atom, const void *v)
1331 p = (const char *) v;
1343 i = *((const int *) v);
1345 gfc_internal_error ("write_atom(): Writing negative integer");
1347 sprintf (buffer, "%d", i);
1352 gfc_internal_error ("write_atom(): Trying to write dab atom");
1356 if(p == NULL || *p == '\0')
1361 if (atom != ATOM_RPAREN)
1363 if (module_column + len > 72)
1368 if (last_atom != ATOM_LPAREN && module_column != 1)
1373 if (atom == ATOM_STRING)
1376 while (p != NULL && *p)
1378 if (atom == ATOM_STRING && *p == '\'')
1383 if (atom == ATOM_STRING)
1391 /***************** Mid-level I/O subroutines *****************/
1393 /* These subroutines let their caller read or write atoms without
1394 caring about which of the two is actually happening. This lets a
1395 subroutine concentrate on the actual format of the data being
1398 static void mio_expr (gfc_expr **);
1399 pointer_info *mio_symbol_ref (gfc_symbol **);
1400 pointer_info *mio_interface_rest (gfc_interface **);
1401 static void mio_symtree_ref (gfc_symtree **);
1403 /* Read or write an enumerated value. On writing, we return the input
1404 value for the convenience of callers. We avoid using an integer
1405 pointer because enums are sometimes inside bitfields. */
1408 mio_name (int t, const mstring *m)
1410 if (iomode == IO_OUTPUT)
1411 write_atom (ATOM_NAME, gfc_code2string (m, t));
1414 require_atom (ATOM_NAME);
1421 /* Specialization of mio_name. */
1423 #define DECL_MIO_NAME(TYPE) \
1424 static inline TYPE \
1425 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1427 return (TYPE) mio_name ((int) t, m); \
1429 #define MIO_NAME(TYPE) mio_name_##TYPE
1434 if (iomode == IO_OUTPUT)
1435 write_atom (ATOM_LPAREN, NULL);
1437 require_atom (ATOM_LPAREN);
1444 if (iomode == IO_OUTPUT)
1445 write_atom (ATOM_RPAREN, NULL);
1447 require_atom (ATOM_RPAREN);
1452 mio_integer (int *ip)
1454 if (iomode == IO_OUTPUT)
1455 write_atom (ATOM_INTEGER, ip);
1458 require_atom (ATOM_INTEGER);
1464 /* Read or write a character pointer that points to a string on the heap. */
1467 mio_allocated_string (const char *s)
1469 if (iomode == IO_OUTPUT)
1471 write_atom (ATOM_STRING, s);
1476 require_atom (ATOM_STRING);
1482 /* Functions for quoting and unquoting strings. */
1485 quote_string (const gfc_char_t *s, const size_t slength)
1487 const gfc_char_t *p;
1491 /* Calculate the length we'll need: a backslash takes two ("\\"),
1492 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1493 for (p = s, i = 0; i < slength; p++, i++)
1497 else if (!gfc_wide_is_printable (*p))
1503 q = res = XCNEWVEC (char, len + 1);
1504 for (p = s, i = 0; i < slength; p++, i++)
1507 *q++ = '\\', *q++ = '\\';
1508 else if (!gfc_wide_is_printable (*p))
1510 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1511 (unsigned HOST_WIDE_INT) *p);
1515 *q++ = (unsigned char) *p;
1523 unquote_string (const char *s)
1529 for (p = s, len = 0; *p; p++, len++)
1536 else if (p[1] == 'U')
1537 p += 9; /* That is a "\U????????". */
1539 gfc_internal_error ("unquote_string(): got bad string");
1542 res = gfc_get_wide_string (len + 1);
1543 for (i = 0, p = s; i < len; i++, p++)
1548 res[i] = (unsigned char) *p;
1549 else if (p[1] == '\\')
1551 res[i] = (unsigned char) '\\';
1556 /* We read the 8-digits hexadecimal constant that follows. */
1561 gcc_assert (p[1] == 'U');
1562 for (j = 0; j < 8; j++)
1565 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1579 /* Read or write a character pointer that points to a wide string on the
1580 heap, performing quoting/unquoting of nonprintable characters using the
1581 form \U???????? (where each ? is a hexadecimal digit).
1582 Length is the length of the string, only known and used in output mode. */
1584 static const gfc_char_t *
1585 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1587 if (iomode == IO_OUTPUT)
1589 char *quoted = quote_string (s, length);
1590 write_atom (ATOM_STRING, quoted);
1596 gfc_char_t *unquoted;
1598 require_atom (ATOM_STRING);
1599 unquoted = unquote_string (atom_string);
1600 gfc_free (atom_string);
1606 /* Read or write a string that is in static memory. */
1609 mio_pool_string (const char **stringp)
1611 /* TODO: one could write the string only once, and refer to it via a
1614 /* As a special case we have to deal with a NULL string. This
1615 happens for the 'module' member of 'gfc_symbol's that are not in a
1616 module. We read / write these as the empty string. */
1617 if (iomode == IO_OUTPUT)
1619 const char *p = *stringp == NULL ? "" : *stringp;
1620 write_atom (ATOM_STRING, p);
1624 require_atom (ATOM_STRING);
1625 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1626 gfc_free (atom_string);
1631 /* Read or write a string that is inside of some already-allocated
1635 mio_internal_string (char *string)
1637 if (iomode == IO_OUTPUT)
1638 write_atom (ATOM_STRING, string);
1641 require_atom (ATOM_STRING);
1642 strcpy (string, atom_string);
1643 gfc_free (atom_string);
1649 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1650 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1651 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1652 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1653 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE, AB_ALLOC_COMP,
1654 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1655 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1656 AB_EXTENSION, AB_PROCEDURE, AB_PROC_POINTER
1660 static const mstring attr_bits[] =
1662 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1663 minit ("DIMENSION", AB_DIMENSION),
1664 minit ("EXTERNAL", AB_EXTERNAL),
1665 minit ("INTRINSIC", AB_INTRINSIC),
1666 minit ("OPTIONAL", AB_OPTIONAL),
1667 minit ("POINTER", AB_POINTER),
1668 minit ("VOLATILE", AB_VOLATILE),
1669 minit ("TARGET", AB_TARGET),
1670 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1671 minit ("DUMMY", AB_DUMMY),
1672 minit ("RESULT", AB_RESULT),
1673 minit ("DATA", AB_DATA),
1674 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1675 minit ("IN_COMMON", AB_IN_COMMON),
1676 minit ("FUNCTION", AB_FUNCTION),
1677 minit ("SUBROUTINE", AB_SUBROUTINE),
1678 minit ("SEQUENCE", AB_SEQUENCE),
1679 minit ("ELEMENTAL", AB_ELEMENTAL),
1680 minit ("PURE", AB_PURE),
1681 minit ("RECURSIVE", AB_RECURSIVE),
1682 minit ("GENERIC", AB_GENERIC),
1683 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1684 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1685 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1686 minit ("IS_BIND_C", AB_IS_BIND_C),
1687 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1688 minit ("IS_ISO_C", AB_IS_ISO_C),
1689 minit ("VALUE", AB_VALUE),
1690 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1691 minit ("POINTER_COMP", AB_POINTER_COMP),
1692 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1693 minit ("ZERO_COMP", AB_ZERO_COMP),
1694 minit ("PROTECTED", AB_PROTECTED),
1695 minit ("ABSTRACT", AB_ABSTRACT),
1696 minit ("EXTENSION", AB_EXTENSION),
1697 minit ("PROCEDURE", AB_PROCEDURE),
1698 minit ("PROC_POINTER", AB_PROC_POINTER),
1702 /* For binding attributes. */
1703 static const mstring binding_passing[] =
1706 minit ("NOPASS", 1),
1709 static const mstring binding_overriding[] =
1711 minit ("OVERRIDABLE", 0),
1712 minit ("NON_OVERRIDABLE", 1),
1713 minit ("DEFERRED", 2),
1716 static const mstring binding_generic[] =
1718 minit ("SPECIFIC", 0),
1719 minit ("GENERIC", 1),
1722 static const mstring binding_ppc[] =
1724 minit ("NO_PPC", 0),
1729 /* Specialization of mio_name. */
1730 DECL_MIO_NAME (ab_attribute)
1731 DECL_MIO_NAME (ar_type)
1732 DECL_MIO_NAME (array_type)
1734 DECL_MIO_NAME (expr_t)
1735 DECL_MIO_NAME (gfc_access)
1736 DECL_MIO_NAME (gfc_intrinsic_op)
1737 DECL_MIO_NAME (ifsrc)
1738 DECL_MIO_NAME (save_state)
1739 DECL_MIO_NAME (procedure_type)
1740 DECL_MIO_NAME (ref_type)
1741 DECL_MIO_NAME (sym_flavor)
1742 DECL_MIO_NAME (sym_intent)
1743 #undef DECL_MIO_NAME
1745 /* Symbol attributes are stored in list with the first three elements
1746 being the enumerated fields, while the remaining elements (if any)
1747 indicate the individual attribute bits. The access field is not
1748 saved-- it controls what symbols are exported when a module is
1752 mio_symbol_attribute (symbol_attribute *attr)
1759 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1760 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1761 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1762 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1763 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1764 ext_attr = attr->ext_attr;
1765 mio_integer ((int *) &ext_attr);
1766 attr->ext_attr = ext_attr;
1768 if (iomode == IO_OUTPUT)
1770 if (attr->allocatable)
1771 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1772 if (attr->dimension)
1773 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1775 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1776 if (attr->intrinsic)
1777 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1779 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1781 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1782 if (attr->is_protected)
1783 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1785 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1786 if (attr->volatile_)
1787 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1789 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1790 if (attr->threadprivate)
1791 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1793 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1795 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1796 /* We deliberately don't preserve the "entry" flag. */
1799 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1800 if (attr->in_namelist)
1801 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1802 if (attr->in_common)
1803 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1806 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1807 if (attr->subroutine)
1808 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1810 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1812 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1815 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1816 if (attr->elemental)
1817 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1819 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1820 if (attr->recursive)
1821 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1822 if (attr->always_explicit)
1823 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1824 if (attr->cray_pointer)
1825 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1826 if (attr->cray_pointee)
1827 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1828 if (attr->is_bind_c)
1829 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1830 if (attr->is_c_interop)
1831 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1833 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1834 if (attr->alloc_comp)
1835 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1836 if (attr->pointer_comp)
1837 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1838 if (attr->private_comp)
1839 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1840 if (attr->zero_comp)
1841 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1842 if (attr->extension)
1843 MIO_NAME (ab_attribute) (AB_EXTENSION, attr_bits);
1844 if (attr->procedure)
1845 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1846 if (attr->proc_pointer)
1847 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1857 if (t == ATOM_RPAREN)
1860 bad_module ("Expected attribute bit name");
1862 switch ((ab_attribute) find_enum (attr_bits))
1864 case AB_ALLOCATABLE:
1865 attr->allocatable = 1;
1868 attr->dimension = 1;
1874 attr->intrinsic = 1;
1883 attr->is_protected = 1;
1889 attr->volatile_ = 1;
1894 case AB_THREADPRIVATE:
1895 attr->threadprivate = 1;
1906 case AB_IN_NAMELIST:
1907 attr->in_namelist = 1;
1910 attr->in_common = 1;
1916 attr->subroutine = 1;
1928 attr->elemental = 1;
1934 attr->recursive = 1;
1936 case AB_ALWAYS_EXPLICIT:
1937 attr->always_explicit = 1;
1939 case AB_CRAY_POINTER:
1940 attr->cray_pointer = 1;
1942 case AB_CRAY_POINTEE:
1943 attr->cray_pointee = 1;
1946 attr->is_bind_c = 1;
1948 case AB_IS_C_INTEROP:
1949 attr->is_c_interop = 1;
1955 attr->alloc_comp = 1;
1957 case AB_POINTER_COMP:
1958 attr->pointer_comp = 1;
1960 case AB_PRIVATE_COMP:
1961 attr->private_comp = 1;
1964 attr->zero_comp = 1;
1967 attr->extension = 1;
1970 attr->procedure = 1;
1972 case AB_PROC_POINTER:
1973 attr->proc_pointer = 1;
1981 static const mstring bt_types[] = {
1982 minit ("INTEGER", BT_INTEGER),
1983 minit ("REAL", BT_REAL),
1984 minit ("COMPLEX", BT_COMPLEX),
1985 minit ("LOGICAL", BT_LOGICAL),
1986 minit ("CHARACTER", BT_CHARACTER),
1987 minit ("DERIVED", BT_DERIVED),
1988 minit ("PROCEDURE", BT_PROCEDURE),
1989 minit ("UNKNOWN", BT_UNKNOWN),
1990 minit ("VOID", BT_VOID),
1996 mio_charlen (gfc_charlen **clp)
2002 if (iomode == IO_OUTPUT)
2006 mio_expr (&cl->length);
2010 if (peek_atom () != ATOM_RPAREN)
2012 cl = gfc_new_charlen (gfc_current_ns);
2013 mio_expr (&cl->length);
2022 /* See if a name is a generated name. */
2025 check_unique_name (const char *name)
2027 return *name == '@';
2032 mio_typespec (gfc_typespec *ts)
2036 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2038 if (ts->type != BT_DERIVED)
2039 mio_integer (&ts->kind);
2041 mio_symbol_ref (&ts->u.derived);
2043 /* Add info for C interop and is_iso_c. */
2044 mio_integer (&ts->is_c_interop);
2045 mio_integer (&ts->is_iso_c);
2047 /* If the typespec is for an identifier either from iso_c_binding, or
2048 a constant that was initialized to an identifier from it, use the
2049 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2051 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2053 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2055 if (ts->type != BT_CHARACTER)
2057 /* ts->u.cl is only valid for BT_CHARACTER. */
2062 mio_charlen (&ts->u.cl);
2068 static const mstring array_spec_types[] = {
2069 minit ("EXPLICIT", AS_EXPLICIT),
2070 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2071 minit ("DEFERRED", AS_DEFERRED),
2072 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2078 mio_array_spec (gfc_array_spec **asp)
2085 if (iomode == IO_OUTPUT)
2093 if (peek_atom () == ATOM_RPAREN)
2099 *asp = as = gfc_get_array_spec ();
2102 mio_integer (&as->rank);
2103 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2105 for (i = 0; i < as->rank; i++)
2107 mio_expr (&as->lower[i]);
2108 mio_expr (&as->upper[i]);
2116 /* Given a pointer to an array reference structure (which lives in a
2117 gfc_ref structure), find the corresponding array specification
2118 structure. Storing the pointer in the ref structure doesn't quite
2119 work when loading from a module. Generating code for an array
2120 reference also needs more information than just the array spec. */
2122 static const mstring array_ref_types[] = {
2123 minit ("FULL", AR_FULL),
2124 minit ("ELEMENT", AR_ELEMENT),
2125 minit ("SECTION", AR_SECTION),
2131 mio_array_ref (gfc_array_ref *ar)
2136 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2137 mio_integer (&ar->dimen);
2145 for (i = 0; i < ar->dimen; i++)
2146 mio_expr (&ar->start[i]);
2151 for (i = 0; i < ar->dimen; i++)
2153 mio_expr (&ar->start[i]);
2154 mio_expr (&ar->end[i]);
2155 mio_expr (&ar->stride[i]);
2161 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2164 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2165 we can't call mio_integer directly. Instead loop over each element
2166 and cast it to/from an integer. */
2167 if (iomode == IO_OUTPUT)
2169 for (i = 0; i < ar->dimen; i++)
2171 int tmp = (int)ar->dimen_type[i];
2172 write_atom (ATOM_INTEGER, &tmp);
2177 for (i = 0; i < ar->dimen; i++)
2179 require_atom (ATOM_INTEGER);
2180 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2184 if (iomode == IO_INPUT)
2186 ar->where = gfc_current_locus;
2188 for (i = 0; i < ar->dimen; i++)
2189 ar->c_where[i] = gfc_current_locus;
2196 /* Saves or restores a pointer. The pointer is converted back and
2197 forth from an integer. We return the pointer_info pointer so that
2198 the caller can take additional action based on the pointer type. */
2200 static pointer_info *
2201 mio_pointer_ref (void *gp)
2205 if (iomode == IO_OUTPUT)
2207 p = get_pointer (*((char **) gp));
2208 write_atom (ATOM_INTEGER, &p->integer);
2212 require_atom (ATOM_INTEGER);
2213 p = add_fixup (atom_int, gp);
2220 /* Save and load references to components that occur within
2221 expressions. We have to describe these references by a number and
2222 by name. The number is necessary for forward references during
2223 reading, and the name is necessary if the symbol already exists in
2224 the namespace and is not loaded again. */
2227 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2229 char name[GFC_MAX_SYMBOL_LEN + 1];
2233 p = mio_pointer_ref (cp);
2234 if (p->type == P_UNKNOWN)
2235 p->type = P_COMPONENT;
2237 if (iomode == IO_OUTPUT)
2238 mio_pool_string (&(*cp)->name);
2241 mio_internal_string (name);
2243 /* It can happen that a component reference can be read before the
2244 associated derived type symbol has been loaded. Return now and
2245 wait for a later iteration of load_needed. */
2249 if (sym->components != NULL && p->u.pointer == NULL)
2251 /* Symbol already loaded, so search by name. */
2252 for (q = sym->components; q; q = q->next)
2253 if (strcmp (q->name, name) == 0)
2257 gfc_internal_error ("mio_component_ref(): Component not found");
2259 associate_integer_pointer (p, q);
2262 /* Make sure this symbol will eventually be loaded. */
2263 p = find_pointer2 (sym);
2264 if (p->u.rsym.state == UNUSED)
2265 p->u.rsym.state = NEEDED;
2270 static void mio_namespace_ref (gfc_namespace **nsp);
2271 static void mio_formal_arglist (gfc_formal_arglist **formal);
2272 static void mio_typebound_proc (gfc_typebound_proc** proc);
2275 mio_component (gfc_component *c)
2279 gfc_formal_arglist *formal;
2283 if (iomode == IO_OUTPUT)
2285 p = get_pointer (c);
2286 mio_integer (&p->integer);
2291 p = get_integer (n);
2292 associate_integer_pointer (p, c);
2295 if (p->type == P_UNKNOWN)
2296 p->type = P_COMPONENT;
2298 mio_pool_string (&c->name);
2299 mio_typespec (&c->ts);
2300 mio_array_spec (&c->as);
2302 mio_symbol_attribute (&c->attr);
2303 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2305 mio_expr (&c->initializer);
2307 if (c->attr.proc_pointer)
2309 if (iomode == IO_OUTPUT)
2312 while (formal && !formal->sym)
2313 formal = formal->next;
2316 mio_namespace_ref (&formal->sym->ns);
2318 mio_namespace_ref (&c->formal_ns);
2322 mio_namespace_ref (&c->formal_ns);
2323 /* TODO: if (c->formal_ns)
2325 c->formal_ns->proc_name = c;
2330 mio_formal_arglist (&c->formal);
2332 mio_typebound_proc (&c->tb);
2340 mio_component_list (gfc_component **cp)
2342 gfc_component *c, *tail;
2346 if (iomode == IO_OUTPUT)
2348 for (c = *cp; c; c = c->next)
2358 if (peek_atom () == ATOM_RPAREN)
2361 c = gfc_get_component ();
2378 mio_actual_arg (gfc_actual_arglist *a)
2381 mio_pool_string (&a->name);
2382 mio_expr (&a->expr);
2388 mio_actual_arglist (gfc_actual_arglist **ap)
2390 gfc_actual_arglist *a, *tail;
2394 if (iomode == IO_OUTPUT)
2396 for (a = *ap; a; a = a->next)
2406 if (peek_atom () != ATOM_LPAREN)
2409 a = gfc_get_actual_arglist ();
2425 /* Read and write formal argument lists. */
2428 mio_formal_arglist (gfc_formal_arglist **formal)
2430 gfc_formal_arglist *f, *tail;
2434 if (iomode == IO_OUTPUT)
2436 for (f = *formal; f; f = f->next)
2437 mio_symbol_ref (&f->sym);
2441 *formal = tail = NULL;
2443 while (peek_atom () != ATOM_RPAREN)
2445 f = gfc_get_formal_arglist ();
2446 mio_symbol_ref (&f->sym);
2448 if (*formal == NULL)
2461 /* Save or restore a reference to a symbol node. */
2464 mio_symbol_ref (gfc_symbol **symp)
2468 p = mio_pointer_ref (symp);
2469 if (p->type == P_UNKNOWN)
2472 if (iomode == IO_OUTPUT)
2474 if (p->u.wsym.state == UNREFERENCED)
2475 p->u.wsym.state = NEEDS_WRITE;
2479 if (p->u.rsym.state == UNUSED)
2480 p->u.rsym.state = NEEDED;
2486 /* Save or restore a reference to a symtree node. */
2489 mio_symtree_ref (gfc_symtree **stp)
2494 if (iomode == IO_OUTPUT)
2495 mio_symbol_ref (&(*stp)->n.sym);
2498 require_atom (ATOM_INTEGER);
2499 p = get_integer (atom_int);
2501 /* An unused equivalence member; make a symbol and a symtree
2503 if (in_load_equiv && p->u.rsym.symtree == NULL)
2505 /* Since this is not used, it must have a unique name. */
2506 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2508 /* Make the symbol. */
2509 if (p->u.rsym.sym == NULL)
2511 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2513 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2516 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2517 p->u.rsym.symtree->n.sym->refs++;
2518 p->u.rsym.referenced = 1;
2520 /* If the symbol is PRIVATE and in COMMON, load_commons will
2521 generate a fixup symbol, which must be associated. */
2523 resolve_fixups (p->fixup, p->u.rsym.sym);
2527 if (p->type == P_UNKNOWN)
2530 if (p->u.rsym.state == UNUSED)
2531 p->u.rsym.state = NEEDED;
2533 if (p->u.rsym.symtree != NULL)
2535 *stp = p->u.rsym.symtree;
2539 f = XCNEW (fixup_t);
2541 f->next = p->u.rsym.stfixup;
2542 p->u.rsym.stfixup = f;
2544 f->pointer = (void **) stp;
2551 mio_iterator (gfc_iterator **ip)
2557 if (iomode == IO_OUTPUT)
2564 if (peek_atom () == ATOM_RPAREN)
2570 *ip = gfc_get_iterator ();
2575 mio_expr (&iter->var);
2576 mio_expr (&iter->start);
2577 mio_expr (&iter->end);
2578 mio_expr (&iter->step);
2586 mio_constructor (gfc_constructor **cp)
2588 gfc_constructor *c, *tail;
2592 if (iomode == IO_OUTPUT)
2594 for (c = *cp; c; c = c->next)
2597 mio_expr (&c->expr);
2598 mio_iterator (&c->iterator);
2607 while (peek_atom () != ATOM_RPAREN)
2609 c = gfc_get_constructor ();
2619 mio_expr (&c->expr);
2620 mio_iterator (&c->iterator);
2629 static const mstring ref_types[] = {
2630 minit ("ARRAY", REF_ARRAY),
2631 minit ("COMPONENT", REF_COMPONENT),
2632 minit ("SUBSTRING", REF_SUBSTRING),
2638 mio_ref (gfc_ref **rp)
2645 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2650 mio_array_ref (&r->u.ar);
2654 mio_symbol_ref (&r->u.c.sym);
2655 mio_component_ref (&r->u.c.component, r->u.c.sym);
2659 mio_expr (&r->u.ss.start);
2660 mio_expr (&r->u.ss.end);
2661 mio_charlen (&r->u.ss.length);
2670 mio_ref_list (gfc_ref **rp)
2672 gfc_ref *ref, *head, *tail;
2676 if (iomode == IO_OUTPUT)
2678 for (ref = *rp; ref; ref = ref->next)
2685 while (peek_atom () != ATOM_RPAREN)
2688 head = tail = gfc_get_ref ();
2691 tail->next = gfc_get_ref ();
2705 /* Read and write an integer value. */
2708 mio_gmp_integer (mpz_t *integer)
2712 if (iomode == IO_INPUT)
2714 if (parse_atom () != ATOM_STRING)
2715 bad_module ("Expected integer string");
2717 mpz_init (*integer);
2718 if (mpz_set_str (*integer, atom_string, 10))
2719 bad_module ("Error converting integer");
2721 gfc_free (atom_string);
2725 p = mpz_get_str (NULL, 10, *integer);
2726 write_atom (ATOM_STRING, p);
2733 mio_gmp_real (mpfr_t *real)
2738 if (iomode == IO_INPUT)
2740 if (parse_atom () != ATOM_STRING)
2741 bad_module ("Expected real string");
2744 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2745 gfc_free (atom_string);
2749 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2751 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2753 write_atom (ATOM_STRING, p);
2758 atom_string = XCNEWVEC (char, strlen (p) + 20);
2760 sprintf (atom_string, "0.%s@%ld", p, exponent);
2762 /* Fix negative numbers. */
2763 if (atom_string[2] == '-')
2765 atom_string[0] = '-';
2766 atom_string[1] = '0';
2767 atom_string[2] = '.';
2770 write_atom (ATOM_STRING, atom_string);
2772 gfc_free (atom_string);
2778 /* Save and restore the shape of an array constructor. */
2781 mio_shape (mpz_t **pshape, int rank)
2787 /* A NULL shape is represented by (). */
2790 if (iomode == IO_OUTPUT)
2802 if (t == ATOM_RPAREN)
2809 shape = gfc_get_shape (rank);
2813 for (n = 0; n < rank; n++)
2814 mio_gmp_integer (&shape[n]);
2820 static const mstring expr_types[] = {
2821 minit ("OP", EXPR_OP),
2822 minit ("FUNCTION", EXPR_FUNCTION),
2823 minit ("CONSTANT", EXPR_CONSTANT),
2824 minit ("VARIABLE", EXPR_VARIABLE),
2825 minit ("SUBSTRING", EXPR_SUBSTRING),
2826 minit ("STRUCTURE", EXPR_STRUCTURE),
2827 minit ("ARRAY", EXPR_ARRAY),
2828 minit ("NULL", EXPR_NULL),
2829 minit ("COMPCALL", EXPR_COMPCALL),
2833 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2834 generic operators, not in expressions. INTRINSIC_USER is also
2835 replaced by the correct function name by the time we see it. */
2837 static const mstring intrinsics[] =
2839 minit ("UPLUS", INTRINSIC_UPLUS),
2840 minit ("UMINUS", INTRINSIC_UMINUS),
2841 minit ("PLUS", INTRINSIC_PLUS),
2842 minit ("MINUS", INTRINSIC_MINUS),
2843 minit ("TIMES", INTRINSIC_TIMES),
2844 minit ("DIVIDE", INTRINSIC_DIVIDE),
2845 minit ("POWER", INTRINSIC_POWER),
2846 minit ("CONCAT", INTRINSIC_CONCAT),
2847 minit ("AND", INTRINSIC_AND),
2848 minit ("OR", INTRINSIC_OR),
2849 minit ("EQV", INTRINSIC_EQV),
2850 minit ("NEQV", INTRINSIC_NEQV),
2851 minit ("EQ_SIGN", INTRINSIC_EQ),
2852 minit ("EQ", INTRINSIC_EQ_OS),
2853 minit ("NE_SIGN", INTRINSIC_NE),
2854 minit ("NE", INTRINSIC_NE_OS),
2855 minit ("GT_SIGN", INTRINSIC_GT),
2856 minit ("GT", INTRINSIC_GT_OS),
2857 minit ("GE_SIGN", INTRINSIC_GE),
2858 minit ("GE", INTRINSIC_GE_OS),
2859 minit ("LT_SIGN", INTRINSIC_LT),
2860 minit ("LT", INTRINSIC_LT_OS),
2861 minit ("LE_SIGN", INTRINSIC_LE),
2862 minit ("LE", INTRINSIC_LE_OS),
2863 minit ("NOT", INTRINSIC_NOT),
2864 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2869 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2872 fix_mio_expr (gfc_expr *e)
2874 gfc_symtree *ns_st = NULL;
2877 if (iomode != IO_OUTPUT)
2882 /* If this is a symtree for a symbol that came from a contained module
2883 namespace, it has a unique name and we should look in the current
2884 namespace to see if the required, non-contained symbol is available
2885 yet. If so, the latter should be written. */
2886 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2887 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2888 e->symtree->n.sym->name);
2890 /* On the other hand, if the existing symbol is the module name or the
2891 new symbol is a dummy argument, do not do the promotion. */
2892 if (ns_st && ns_st->n.sym
2893 && ns_st->n.sym->attr.flavor != FL_MODULE
2894 && !e->symtree->n.sym->attr.dummy)
2897 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2899 /* In some circumstances, a function used in an initialization
2900 expression, in one use associated module, can fail to be
2901 coupled to its symtree when used in a specification
2902 expression in another module. */
2903 fname = e->value.function.esym ? e->value.function.esym->name
2904 : e->value.function.isym->name;
2905 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2910 /* Read and write expressions. The form "()" is allowed to indicate a
2914 mio_expr (gfc_expr **ep)
2922 if (iomode == IO_OUTPUT)
2931 MIO_NAME (expr_t) (e->expr_type, expr_types);
2936 if (t == ATOM_RPAREN)
2943 bad_module ("Expected expression type");
2945 e = *ep = gfc_get_expr ();
2946 e->where = gfc_current_locus;
2947 e->expr_type = (expr_t) find_enum (expr_types);
2950 mio_typespec (&e->ts);
2951 mio_integer (&e->rank);
2955 switch (e->expr_type)
2959 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
2961 switch (e->value.op.op)
2963 case INTRINSIC_UPLUS:
2964 case INTRINSIC_UMINUS:
2966 case INTRINSIC_PARENTHESES:
2967 mio_expr (&e->value.op.op1);
2970 case INTRINSIC_PLUS:
2971 case INTRINSIC_MINUS:
2972 case INTRINSIC_TIMES:
2973 case INTRINSIC_DIVIDE:
2974 case INTRINSIC_POWER:
2975 case INTRINSIC_CONCAT:
2979 case INTRINSIC_NEQV:
2981 case INTRINSIC_EQ_OS:
2983 case INTRINSIC_NE_OS:
2985 case INTRINSIC_GT_OS:
2987 case INTRINSIC_GE_OS:
2989 case INTRINSIC_LT_OS:
2991 case INTRINSIC_LE_OS:
2992 mio_expr (&e->value.op.op1);
2993 mio_expr (&e->value.op.op2);
2997 bad_module ("Bad operator");
3003 mio_symtree_ref (&e->symtree);
3004 mio_actual_arglist (&e->value.function.actual);
3006 if (iomode == IO_OUTPUT)
3008 e->value.function.name
3009 = mio_allocated_string (e->value.function.name);
3010 flag = e->value.function.esym != NULL;
3011 mio_integer (&flag);
3013 mio_symbol_ref (&e->value.function.esym);
3015 write_atom (ATOM_STRING, e->value.function.isym->name);
3019 require_atom (ATOM_STRING);
3020 e->value.function.name = gfc_get_string (atom_string);
3021 gfc_free (atom_string);
3023 mio_integer (&flag);
3025 mio_symbol_ref (&e->value.function.esym);
3028 require_atom (ATOM_STRING);
3029 e->value.function.isym = gfc_find_function (atom_string);
3030 gfc_free (atom_string);
3037 mio_symtree_ref (&e->symtree);
3038 mio_ref_list (&e->ref);
3041 case EXPR_SUBSTRING:
3042 e->value.character.string
3043 = CONST_CAST (gfc_char_t *,
3044 mio_allocated_wide_string (e->value.character.string,
3045 e->value.character.length));
3046 mio_ref_list (&e->ref);
3049 case EXPR_STRUCTURE:
3051 mio_constructor (&e->value.constructor);
3052 mio_shape (&e->shape, e->rank);
3059 mio_gmp_integer (&e->value.integer);
3063 gfc_set_model_kind (e->ts.kind);
3064 mio_gmp_real (&e->value.real);
3068 gfc_set_model_kind (e->ts.kind);
3069 mio_gmp_real (&mpc_realref (e->value.complex));
3070 mio_gmp_real (&mpc_imagref (e->value.complex));
3074 mio_integer (&e->value.logical);
3078 mio_integer (&e->value.character.length);
3079 e->value.character.string
3080 = CONST_CAST (gfc_char_t *,
3081 mio_allocated_wide_string (e->value.character.string,
3082 e->value.character.length));
3086 bad_module ("Bad type in constant expression");
3104 /* Read and write namelists. */
3107 mio_namelist (gfc_symbol *sym)
3109 gfc_namelist *n, *m;
3110 const char *check_name;
3114 if (iomode == IO_OUTPUT)
3116 for (n = sym->namelist; n; n = n->next)
3117 mio_symbol_ref (&n->sym);
3121 /* This departure from the standard is flagged as an error.
3122 It does, in fact, work correctly. TODO: Allow it
3124 if (sym->attr.flavor == FL_NAMELIST)
3126 check_name = find_use_name (sym->name, false);
3127 if (check_name && strcmp (check_name, sym->name) != 0)
3128 gfc_error ("Namelist %s cannot be renamed by USE "
3129 "association to %s", sym->name, check_name);
3133 while (peek_atom () != ATOM_RPAREN)
3135 n = gfc_get_namelist ();
3136 mio_symbol_ref (&n->sym);
3138 if (sym->namelist == NULL)
3145 sym->namelist_tail = m;
3152 /* Save/restore lists of gfc_interface structures. When loading an
3153 interface, we are really appending to the existing list of
3154 interfaces. Checking for duplicate and ambiguous interfaces has to
3155 be done later when all symbols have been loaded. */
3158 mio_interface_rest (gfc_interface **ip)
3160 gfc_interface *tail, *p;
3161 pointer_info *pi = NULL;
3163 if (iomode == IO_OUTPUT)
3166 for (p = *ip; p; p = p->next)
3167 mio_symbol_ref (&p->sym);
3182 if (peek_atom () == ATOM_RPAREN)
3185 p = gfc_get_interface ();
3186 p->where = gfc_current_locus;
3187 pi = mio_symbol_ref (&p->sym);
3203 /* Save/restore a nameless operator interface. */
3206 mio_interface (gfc_interface **ip)
3209 mio_interface_rest (ip);
3213 /* Save/restore a named operator interface. */
3216 mio_symbol_interface (const char **name, const char **module,
3220 mio_pool_string (name);
3221 mio_pool_string (module);
3222 mio_interface_rest (ip);
3227 mio_namespace_ref (gfc_namespace **nsp)
3232 p = mio_pointer_ref (nsp);
3234 if (p->type == P_UNKNOWN)
3235 p->type = P_NAMESPACE;
3237 if (iomode == IO_INPUT && p->integer != 0)
3239 ns = (gfc_namespace *) p->u.pointer;
3242 ns = gfc_get_namespace (NULL, 0);
3243 associate_integer_pointer (p, ns);
3251 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3253 static gfc_namespace* current_f2k_derived;
3256 mio_typebound_proc (gfc_typebound_proc** proc)
3259 int overriding_flag;
3261 if (iomode == IO_INPUT)
3263 *proc = gfc_get_typebound_proc ();
3264 (*proc)->where = gfc_current_locus;
3270 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3272 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3273 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3274 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3275 overriding_flag = mio_name (overriding_flag, binding_overriding);
3276 (*proc)->deferred = ((overriding_flag & 2) != 0);
3277 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3278 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3280 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3281 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3282 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3284 mio_pool_string (&((*proc)->pass_arg));
3286 flag = (int) (*proc)->pass_arg_num;
3287 mio_integer (&flag);
3288 (*proc)->pass_arg_num = (unsigned) flag;
3290 if ((*proc)->is_generic)
3296 if (iomode == IO_OUTPUT)
3297 for (g = (*proc)->u.generic; g; g = g->next)
3298 mio_allocated_string (g->specific_st->name);
3301 (*proc)->u.generic = NULL;
3302 while (peek_atom () != ATOM_RPAREN)
3304 gfc_symtree** sym_root;
3306 g = gfc_get_tbp_generic ();
3309 require_atom (ATOM_STRING);
3310 sym_root = ¤t_f2k_derived->tb_sym_root;
3311 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3312 gfc_free (atom_string);
3314 g->next = (*proc)->u.generic;
3315 (*proc)->u.generic = g;
3321 else if (!(*proc)->ppc)
3322 mio_symtree_ref (&(*proc)->u.specific);
3328 mio_typebound_symtree (gfc_symtree* st)
3330 if (iomode == IO_OUTPUT && !st->n.tb)
3333 if (iomode == IO_OUTPUT)
3336 mio_allocated_string (st->name);
3338 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3340 mio_typebound_proc (&st->n.tb);
3345 mio_finalizer (gfc_finalizer **f)
3347 if (iomode == IO_OUTPUT)
3350 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3351 mio_symtree_ref (&(*f)->proc_tree);
3355 *f = gfc_get_finalizer ();
3356 (*f)->where = gfc_current_locus; /* Value should not matter. */
3359 mio_symtree_ref (&(*f)->proc_tree);
3360 (*f)->proc_sym = NULL;
3365 mio_f2k_derived (gfc_namespace *f2k)
3367 current_f2k_derived = f2k;
3369 /* Handle the list of finalizer procedures. */
3371 if (iomode == IO_OUTPUT)
3374 for (f = f2k->finalizers; f; f = f->next)
3379 f2k->finalizers = NULL;
3380 while (peek_atom () != ATOM_RPAREN)
3382 gfc_finalizer *cur = NULL;
3383 mio_finalizer (&cur);
3384 cur->next = f2k->finalizers;
3385 f2k->finalizers = cur;
3390 /* Handle type-bound procedures. */
3392 if (iomode == IO_OUTPUT)
3393 gfc_traverse_symtree (f2k->tb_sym_root, &mio_typebound_symtree);
3396 while (peek_atom () == ATOM_LPAREN)
3402 require_atom (ATOM_STRING);
3403 st = gfc_get_tbp_symtree (&f2k->tb_sym_root, atom_string);
3404 gfc_free (atom_string);
3406 mio_typebound_symtree (st);
3413 mio_full_f2k_derived (gfc_symbol *sym)
3417 if (iomode == IO_OUTPUT)
3419 if (sym->f2k_derived)
3420 mio_f2k_derived (sym->f2k_derived);
3424 if (peek_atom () != ATOM_RPAREN)
3426 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3427 mio_f2k_derived (sym->f2k_derived);
3430 gcc_assert (!sym->f2k_derived);
3437 /* Unlike most other routines, the address of the symbol node is already
3438 fixed on input and the name/module has already been filled in. */
3441 mio_symbol (gfc_symbol *sym)
3443 int intmod = INTMOD_NONE;
3447 mio_symbol_attribute (&sym->attr);
3448 mio_typespec (&sym->ts);
3450 if (iomode == IO_OUTPUT)
3451 mio_namespace_ref (&sym->formal_ns);
3454 mio_namespace_ref (&sym->formal_ns);
3457 sym->formal_ns->proc_name = sym;
3462 /* Save/restore common block links. */
3463 mio_symbol_ref (&sym->common_next);
3465 mio_formal_arglist (&sym->formal);
3467 if (sym->attr.flavor == FL_PARAMETER)
3468 mio_expr (&sym->value);
3470 mio_array_spec (&sym->as);
3472 mio_symbol_ref (&sym->result);
3474 if (sym->attr.cray_pointee)
3475 mio_symbol_ref (&sym->cp_pointer);
3477 /* Note that components are always saved, even if they are supposed
3478 to be private. Component access is checked during searching. */
3480 mio_component_list (&sym->components);
3482 if (sym->components != NULL)
3483 sym->component_access
3484 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3486 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3487 mio_full_f2k_derived (sym);
3491 /* Add the fields that say whether this is from an intrinsic module,
3492 and if so, what symbol it is within the module. */
3493 /* mio_integer (&(sym->from_intmod)); */
3494 if (iomode == IO_OUTPUT)
3496 intmod = sym->from_intmod;
3497 mio_integer (&intmod);
3501 mio_integer (&intmod);
3502 sym->from_intmod = (intmod_id) intmod;
3505 mio_integer (&(sym->intmod_sym_id));
3511 /************************* Top level subroutines *************************/
3513 /* Given a root symtree node and a symbol, try to find a symtree that
3514 references the symbol that is not a unique name. */
3516 static gfc_symtree *
3517 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3519 gfc_symtree *s = NULL;
3524 s = find_symtree_for_symbol (st->right, sym);
3527 s = find_symtree_for_symbol (st->left, sym);
3531 if (st->n.sym == sym && !check_unique_name (st->name))
3538 /* A recursive function to look for a specific symbol by name and by
3539 module. Whilst several symtrees might point to one symbol, its
3540 is sufficient for the purposes here than one exist. Note that
3541 generic interfaces are distinguished as are symbols that have been
3542 renamed in another module. */
3543 static gfc_symtree *
3544 find_symbol (gfc_symtree *st, const char *name,
3545 const char *module, int generic)
3548 gfc_symtree *retval, *s;
3550 if (st == NULL || st->n.sym == NULL)
3553 c = strcmp (name, st->n.sym->name);
3554 if (c == 0 && st->n.sym->module
3555 && strcmp (module, st->n.sym->module) == 0
3556 && !check_unique_name (st->name))
3558 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3560 /* Detect symbols that are renamed by use association in another
3561 module by the absence of a symtree and null attr.use_rename,
3562 since the latter is not transmitted in the module file. */
3563 if (((!generic && !st->n.sym->attr.generic)
3564 || (generic && st->n.sym->attr.generic))
3565 && !(s == NULL && !st->n.sym->attr.use_rename))
3569 retval = find_symbol (st->left, name, module, generic);
3572 retval = find_symbol (st->right, name, module, generic);
3578 /* Skip a list between balanced left and right parens. */
3588 switch (parse_atom ())
3599 gfc_free (atom_string);
3611 /* Load operator interfaces from the module. Interfaces are unusual
3612 in that they attach themselves to existing symbols. */
3615 load_operator_interfaces (void)
3618 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3620 pointer_info *pi = NULL;
3625 while (peek_atom () != ATOM_RPAREN)
3629 mio_internal_string (name);
3630 mio_internal_string (module);
3632 n = number_use_names (name, true);
3635 for (i = 1; i <= n; i++)
3637 /* Decide if we need to load this one or not. */
3638 p = find_use_name_n (name, &i, true);
3642 while (parse_atom () != ATOM_RPAREN);
3648 uop = gfc_get_uop (p);
3649 pi = mio_interface_rest (&uop->op);
3653 if (gfc_find_uop (p, NULL))
3655 uop = gfc_get_uop (p);
3656 uop->op = gfc_get_interface ();
3657 uop->op->where = gfc_current_locus;
3658 add_fixup (pi->integer, &uop->op->sym);
3667 /* Load interfaces from the module. Interfaces are unusual in that
3668 they attach themselves to existing symbols. */
3671 load_generic_interfaces (void)
3674 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3676 gfc_interface *generic = NULL;
3681 while (peek_atom () != ATOM_RPAREN)
3685 mio_internal_string (name);
3686 mio_internal_string (module);
3688 n = number_use_names (name, false);
3689 renamed = n ? 1 : 0;
3692 for (i = 1; i <= n; i++)
3695 /* Decide if we need to load this one or not. */
3696 p = find_use_name_n (name, &i, false);
3698 st = find_symbol (gfc_current_ns->sym_root,
3699 name, module_name, 1);
3701 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3703 /* Skip the specific names for these cases. */
3704 while (i == 1 && parse_atom () != ATOM_RPAREN);
3709 /* If the symbol exists already and is being USEd without being
3710 in an ONLY clause, do not load a new symtree(11.3.2). */
3711 if (!only_flag && st)
3716 /* Make the symbol inaccessible if it has been added by a USE
3717 statement without an ONLY(11.3.2). */
3719 && !st->n.sym->attr.use_only
3720 && !st->n.sym->attr.use_rename
3721 && strcmp (st->n.sym->module, module_name) == 0)
3724 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3725 st = gfc_get_unique_symtree (gfc_current_ns);
3732 if (strcmp (st->name, p) != 0)
3734 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3740 /* Since we haven't found a valid generic interface, we had
3744 gfc_get_symbol (p, NULL, &sym);
3745 sym->name = gfc_get_string (name);
3746 sym->module = gfc_get_string (module_name);
3747 sym->attr.flavor = FL_PROCEDURE;
3748 sym->attr.generic = 1;
3749 sym->attr.use_assoc = 1;
3754 /* Unless sym is a generic interface, this reference
3757 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3761 if (st && !sym->attr.generic
3763 && strcmp(module, sym->module))
3767 sym->attr.use_only = only_flag;
3768 sym->attr.use_rename = renamed;
3772 mio_interface_rest (&sym->generic);
3773 generic = sym->generic;
3775 else if (!sym->generic)
3777 sym->generic = generic;
3778 sym->attr.generic_copy = 1;
3787 /* Load common blocks. */
3792 char name[GFC_MAX_SYMBOL_LEN + 1];
3797 while (peek_atom () != ATOM_RPAREN)
3801 mio_internal_string (name);
3803 p = gfc_get_common (name, 1);
3805 mio_symbol_ref (&p->head);
3806 mio_integer (&flags);
3810 p->threadprivate = 1;
3813 /* Get whether this was a bind(c) common or not. */
3814 mio_integer (&p->is_bind_c);
3815 /* Get the binding label. */
3816 mio_internal_string (p->binding_label);
3825 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3826 so that unused variables are not loaded and so that the expression can
3832 gfc_equiv *head, *tail, *end, *eq;
3836 in_load_equiv = true;
3838 end = gfc_current_ns->equiv;
3839 while (end != NULL && end->next != NULL)
3842 while (peek_atom () != ATOM_RPAREN) {
3846 while(peek_atom () != ATOM_RPAREN)
3849 head = tail = gfc_get_equiv ();
3852 tail->eq = gfc_get_equiv ();
3856 mio_pool_string (&tail->module);
3857 mio_expr (&tail->expr);
3860 /* Unused equivalence members have a unique name. In addition, it
3861 must be checked that the symbols are from the same module. */
3863 for (eq = head; eq; eq = eq->eq)
3865 if (eq->expr->symtree->n.sym->module
3866 && head->expr->symtree->n.sym->module
3867 && strcmp (head->expr->symtree->n.sym->module,
3868 eq->expr->symtree->n.sym->module) == 0
3869 && !check_unique_name (eq->expr->symtree->name))
3878 for (eq = head; eq; eq = head)
3881 gfc_free_expr (eq->expr);
3887 gfc_current_ns->equiv = head;
3898 in_load_equiv = false;
3902 /* Recursive function to traverse the pointer_info tree and load a
3903 needed symbol. We return nonzero if we load a symbol and stop the
3904 traversal, because the act of loading can alter the tree. */
3907 load_needed (pointer_info *p)
3918 rv |= load_needed (p->left);
3919 rv |= load_needed (p->right);
3921 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
3924 p->u.rsym.state = USED;
3926 set_module_locus (&p->u.rsym.where);
3928 sym = p->u.rsym.sym;
3931 q = get_integer (p->u.rsym.ns);
3933 ns = (gfc_namespace *) q->u.pointer;
3936 /* Create an interface namespace if necessary. These are
3937 the namespaces that hold the formal parameters of module
3940 ns = gfc_get_namespace (NULL, 0);
3941 associate_integer_pointer (q, ns);
3944 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
3945 doesn't go pear-shaped if the symbol is used. */
3947 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
3950 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
3951 sym->module = gfc_get_string (p->u.rsym.module);
3952 strcpy (sym->binding_label, p->u.rsym.binding_label);
3954 associate_integer_pointer (p, sym);
3958 sym->attr.use_assoc = 1;
3960 sym->attr.use_only = 1;
3961 if (p->u.rsym.renamed)
3962 sym->attr.use_rename = 1;
3968 /* Recursive function for cleaning up things after a module has been read. */
3971 read_cleanup (pointer_info *p)
3979 read_cleanup (p->left);
3980 read_cleanup (p->right);
3982 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
3984 /* Add hidden symbols to the symtree. */
3985 q = get_integer (p->u.rsym.ns);
3986 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
3988 st->n.sym = p->u.rsym.sym;
3991 /* Fixup any symtree references. */
3992 p->u.rsym.symtree = st;
3993 resolve_fixups (p->u.rsym.stfixup, st);
3994 p->u.rsym.stfixup = NULL;
3997 /* Free unused symbols. */
3998 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
3999 gfc_free_symbol (p->u.rsym.sym);
4003 /* It is not quite enough to check for ambiguity in the symbols by
4004 the loaded symbol and the new symbol not being identical. */
4006 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4010 symbol_attribute attr;
4012 rsym = info->u.rsym.sym;
4016 /* If the existing symbol is generic from a different module and
4017 the new symbol is generic there can be no ambiguity. */
4018 if (st_sym->attr.generic
4020 && strcmp (st_sym->module, module_name))
4022 /* The new symbol's attributes have not yet been read. Since
4023 we need attr.generic, read it directly. */
4024 get_module_locus (&locus);
4025 set_module_locus (&info->u.rsym.where);
4028 mio_symbol_attribute (&attr);
4029 set_module_locus (&locus);
4038 /* Read a module file. */
4043 module_locus operator_interfaces, user_operators;
4045 char name[GFC_MAX_SYMBOL_LEN + 1];
4047 int ambiguous, j, nuse, symbol;
4048 pointer_info *info, *q;
4053 get_module_locus (&operator_interfaces); /* Skip these for now. */
4056 get_module_locus (&user_operators);
4060 /* Skip commons and equivalences for now. */
4066 /* Create the fixup nodes for all the symbols. */
4068 while (peek_atom () != ATOM_RPAREN)
4070 require_atom (ATOM_INTEGER);
4071 info = get_integer (atom_int);
4073 info->type = P_SYMBOL;
4074 info->u.rsym.state = UNUSED;
4076 mio_internal_string (info->u.rsym.true_name);
4077 mio_internal_string (info->u.rsym.module);
4078 mio_internal_string (info->u.rsym.binding_label);
4081 require_atom (ATOM_INTEGER);
4082 info->u.rsym.ns = atom_int;
4084 get_module_locus (&info->u.rsym.where);
4087 /* See if the symbol has already been loaded by a previous module.
4088 If so, we reference the existing symbol and prevent it from
4089 being loaded again. This should not happen if the symbol being
4090 read is an index for an assumed shape dummy array (ns != 1). */
4092 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4095 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4098 info->u.rsym.state = USED;
4099 info->u.rsym.sym = sym;
4101 /* Some symbols do not have a namespace (eg. formal arguments),
4102 so the automatic "unique symtree" mechanism must be suppressed
4103 by marking them as referenced. */
4104 q = get_integer (info->u.rsym.ns);
4105 if (q->u.pointer == NULL)
4107 info->u.rsym.referenced = 1;
4111 /* If possible recycle the symtree that references the symbol.
4112 If a symtree is not found and the module does not import one,
4113 a unique-name symtree is found by read_cleanup. */
4114 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4117 info->u.rsym.symtree = st;
4118 info->u.rsym.referenced = 1;
4124 /* Parse the symtree lists. This lets us mark which symbols need to
4125 be loaded. Renaming is also done at this point by replacing the
4130 while (peek_atom () != ATOM_RPAREN)
4132 mio_internal_string (name);
4133 mio_integer (&ambiguous);
4134 mio_integer (&symbol);
4136 info = get_integer (symbol);
4138 /* See how many use names there are. If none, go through the start
4139 of the loop at least once. */
4140 nuse = number_use_names (name, false);
4141 info->u.rsym.renamed = nuse ? 1 : 0;
4146 for (j = 1; j <= nuse; j++)
4148 /* Get the jth local name for this symbol. */
4149 p = find_use_name_n (name, &j, false);
4151 if (p == NULL && strcmp (name, module_name) == 0)
4154 /* Skip symtree nodes not in an ONLY clause, unless there
4155 is an existing symtree loaded from another USE statement. */
4158 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4160 info->u.rsym.symtree = st;
4164 /* If a symbol of the same name and module exists already,
4165 this symbol, which is not in an ONLY clause, must not be
4166 added to the namespace(11.3.2). Note that find_symbol
4167 only returns the first occurrence that it finds. */
4168 if (!only_flag && !info->u.rsym.renamed
4169 && strcmp (name, module_name) != 0
4170 && find_symbol (gfc_current_ns->sym_root, name,
4174 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4178 /* Check for ambiguous symbols. */
4179 if (check_for_ambiguous (st->n.sym, info))
4181 info->u.rsym.symtree = st;
4185 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4187 /* Delete the symtree if the symbol has been added by a USE
4188 statement without an ONLY(11.3.2). Remember that the rsym
4189 will be the same as the symbol found in the symtree, for
4191 if (st && (only_flag || info->u.rsym.renamed)
4192 && !st->n.sym->attr.use_only
4193 && !st->n.sym->attr.use_rename
4194 && info->u.rsym.sym == st->n.sym)
4195 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4197 /* Create a symtree node in the current namespace for this
4199 st = check_unique_name (p)
4200 ? gfc_get_unique_symtree (gfc_current_ns)
4201 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4202 st->ambiguous = ambiguous;
4204 sym = info->u.rsym.sym;
4206 /* Create a symbol node if it doesn't already exist. */
4209 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4211 sym = info->u.rsym.sym;
4212 sym->module = gfc_get_string (info->u.rsym.module);
4214 /* TODO: hmm, can we test this? Do we know it will be
4215 initialized to zeros? */
4216 if (info->u.rsym.binding_label[0] != '\0')
4217 strcpy (sym->binding_label, info->u.rsym.binding_label);
4223 if (strcmp (name, p) != 0)
4224 sym->attr.use_rename = 1;
4226 /* We need to set the only_flag here so that symbols from the
4227 same USE...ONLY but earlier are not deleted from the tree in
4228 the gfc_delete_symtree above. */
4229 sym->attr.use_only = only_flag;
4231 /* Store the symtree pointing to this symbol. */
4232 info->u.rsym.symtree = st;
4234 if (info->u.rsym.state == UNUSED)
4235 info->u.rsym.state = NEEDED;
4236 info->u.rsym.referenced = 1;
4243 /* Load intrinsic operator interfaces. */
4244 set_module_locus (&operator_interfaces);
4247 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4249 if (i == INTRINSIC_USER)
4254 u = find_use_operator ((gfc_intrinsic_op) i);
4265 mio_interface (&gfc_current_ns->op[i]);
4270 /* Load generic and user operator interfaces. These must follow the
4271 loading of symtree because otherwise symbols can be marked as
4274 set_module_locus (&user_operators);
4276 load_operator_interfaces ();
4277 load_generic_interfaces ();
4282 /* At this point, we read those symbols that are needed but haven't
4283 been loaded yet. If one symbol requires another, the other gets
4284 marked as NEEDED if its previous state was UNUSED. */
4286 while (load_needed (pi_root));
4288 /* Make sure all elements of the rename-list were found in the module. */
4290 for (u = gfc_rename_list; u; u = u->next)
4295 if (u->op == INTRINSIC_NONE)
4297 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4298 u->use_name, &u->where, module_name);
4302 if (u->op == INTRINSIC_USER)
4304 gfc_error ("User operator '%s' referenced at %L not found "
4305 "in module '%s'", u->use_name, &u->where, module_name);
4309 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4310 "in module '%s'", gfc_op2string (u->op), &u->where,
4314 gfc_check_interfaces (gfc_current_ns);
4316 /* Clean up symbol nodes that were never loaded, create references
4317 to hidden symbols. */
4319 read_cleanup (pi_root);
4323 /* Given an access type that is specific to an entity and the default
4324 access, return nonzero if the entity is publicly accessible. If the
4325 element is declared as PUBLIC, then it is public; if declared
4326 PRIVATE, then private, and otherwise it is public unless the default
4327 access in this context has been declared PRIVATE. */
4330 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4332 if (specific_access == ACCESS_PUBLIC)
4334 if (specific_access == ACCESS_PRIVATE)
4337 if (gfc_option.flag_module_private)
4338 return default_access == ACCESS_PUBLIC;
4340 return default_access != ACCESS_PRIVATE;
4344 /* A structure to remember which commons we've already written. */
4346 struct written_common
4348 BBT_HEADER(written_common);
4349 const char *name, *label;
4352 static struct written_common *written_commons = NULL;
4354 /* Comparison function used for balancing the binary tree. */
4357 compare_written_commons (void *a1, void *b1)
4359 const char *aname = ((struct written_common *) a1)->name;
4360 const char *alabel = ((struct written_common *) a1)->label;
4361 const char *bname = ((struct written_common *) b1)->name;
4362 const char *blabel = ((struct written_common *) b1)->label;
4363 int c = strcmp (aname, bname);
4365 return (c != 0 ? c : strcmp (alabel, blabel));
4368 /* Free a list of written commons. */
4371 free_written_common (struct written_common *w)
4377 free_written_common (w->left);
4379 free_written_common (w->right);
4384 /* Write a common block to the module -- recursive helper function. */
4387 write_common_0 (gfc_symtree *st, bool this_module)
4393 struct written_common *w;
4394 bool write_me = true;
4399 write_common_0 (st->left, this_module);
4401 /* We will write out the binding label, or the name if no label given. */
4402 name = st->n.common->name;
4404 label = p->is_bind_c ? p->binding_label : p->name;
4406 /* Check if we've already output this common. */
4407 w = written_commons;
4410 int c = strcmp (name, w->name);
4411 c = (c != 0 ? c : strcmp (label, w->label));
4415 w = (c < 0) ? w->left : w->right;
4418 if (this_module && p->use_assoc)
4423 /* Write the common to the module. */
4425 mio_pool_string (&name);
4427 mio_symbol_ref (&p->head);
4428 flags = p->saved ? 1 : 0;
4429 if (p->threadprivate)
4431 mio_integer (&flags);
4433 /* Write out whether the common block is bind(c) or not. */
4434 mio_integer (&(p->is_bind_c));
4436 mio_pool_string (&label);
4439 /* Record that we have written this common. */
4440 w = XCNEW (struct written_common);
4443 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4446 write_common_0 (st->right, this_module);
4450 /* Write a common, by initializing the list of written commons, calling
4451 the recursive function write_common_0() and cleaning up afterwards. */
4454 write_common (gfc_symtree *st)
4456 written_commons = NULL;
4457 write_common_0 (st, true);
4458 write_common_0 (st, false);
4459 free_written_common (written_commons);
4460 written_commons = NULL;
4464 /* Write the blank common block to the module. */
4467 write_blank_common (void)
4469 const char * name = BLANK_COMMON_NAME;
4471 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4472 this, but it hasn't been checked. Just making it so for now. */
4475 if (gfc_current_ns->blank_common.head == NULL)
4480 mio_pool_string (&name);
4482 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4483 saved = gfc_current_ns->blank_common.saved;
4484 mio_integer (&saved);
4486 /* Write out whether the common block is bind(c) or not. */
4487 mio_integer (&is_bind_c);
4489 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4490 it doesn't matter because the label isn't used. */
4491 mio_pool_string (&name);
4497 /* Write equivalences to the module. */
4506 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4510 for (e = eq; e; e = e->eq)
4512 if (e->module == NULL)
4513 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4514 mio_allocated_string (e->module);
4515 mio_expr (&e->expr);
4524 /* Write a symbol to the module. */
4527 write_symbol (int n, gfc_symbol *sym)
4531 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4532 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4535 mio_pool_string (&sym->name);
4537 mio_pool_string (&sym->module);
4538 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4540 label = sym->binding_label;
4541 mio_pool_string (&label);
4544 mio_pool_string (&sym->name);
4546 mio_pointer_ref (&sym->ns);
4553 /* Recursive traversal function to write the initial set of symbols to
4554 the module. We check to see if the symbol should be written
4555 according to the access specification. */
4558 write_symbol0 (gfc_symtree *st)
4562 bool dont_write = false;
4567 write_symbol0 (st->left);
4570 if (sym->module == NULL)
4571 sym->module = gfc_get_string (module_name);
4573 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4574 && !sym->attr.subroutine && !sym->attr.function)
4577 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4582 p = get_pointer (sym);
4583 if (p->type == P_UNKNOWN)
4586 if (p->u.wsym.state != WRITTEN)
4588 write_symbol (p->integer, sym);
4589 p->u.wsym.state = WRITTEN;
4593 write_symbol0 (st->right);
4597 /* Recursive traversal function to write the secondary set of symbols
4598 to the module file. These are symbols that were not public yet are
4599 needed by the public symbols or another dependent symbol. The act
4600 of writing a symbol can modify the pointer_info tree, so we cease
4601 traversal if we find a symbol to write. We return nonzero if a
4602 symbol was written and pass that information upwards. */
4605 write_symbol1 (pointer_info *p)
4612 result = write_symbol1 (p->left);
4614 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4616 p->u.wsym.state = WRITTEN;
4617 write_symbol (p->integer, p->u.wsym.sym);
4621 result |= write_symbol1 (p->right);
4626 /* Write operator interfaces associated with a symbol. */
4629 write_operator (gfc_user_op *uop)
4631 static char nullstring[] = "";
4632 const char *p = nullstring;
4635 || !gfc_check_access (uop->access, uop->ns->default_access))
4638 mio_symbol_interface (&uop->name, &p, &uop->op);
4642 /* Write generic interfaces from the namespace sym_root. */
4645 write_generic (gfc_symtree *st)
4652 write_generic (st->left);
4653 write_generic (st->right);
4656 if (!sym || check_unique_name (st->name))
4659 if (sym->generic == NULL
4660 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4663 if (sym->module == NULL)
4664 sym->module = gfc_get_string (module_name);
4666 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4671 write_symtree (gfc_symtree *st)
4678 /* A symbol in an interface body must not be visible in the
4680 if (sym->ns != gfc_current_ns
4681 && sym->ns->proc_name
4682 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4685 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4686 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4687 && !sym->attr.subroutine && !sym->attr.function))
4690 if (check_unique_name (st->name))
4693 p = find_pointer (sym);
4695 gfc_internal_error ("write_symtree(): Symbol not written");
4697 mio_pool_string (&st->name);
4698 mio_integer (&st->ambiguous);
4699 mio_integer (&p->integer);
4708 /* Write the operator interfaces. */
4711 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4713 if (i == INTRINSIC_USER)
4716 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4717 gfc_current_ns->default_access)
4718 ? &gfc_current_ns->op[i] : NULL);
4726 gfc_traverse_user_op (gfc_current_ns, write_operator);
4732 write_generic (gfc_current_ns->sym_root);
4738 write_blank_common ();
4739 write_common (gfc_current_ns->common_root);
4750 /* Write symbol information. First we traverse all symbols in the
4751 primary namespace, writing those that need to be written.
4752 Sometimes writing one symbol will cause another to need to be
4753 written. A list of these symbols ends up on the write stack, and
4754 we end by popping the bottom of the stack and writing the symbol
4755 until the stack is empty. */
4759 write_symbol0 (gfc_current_ns->sym_root);
4760 while (write_symbol1 (pi_root))
4769 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
4774 /* Read a MD5 sum from the header of a module file. If the file cannot
4775 be opened, or we have any other error, we return -1. */
4778 read_md5_from_module_file (const char * filename, unsigned char md5[16])
4784 /* Open the file. */
4785 if ((file = fopen (filename, "r")) == NULL)
4788 /* Read the first line. */
4789 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
4795 /* The file also needs to be overwritten if the version number changed. */
4796 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
4797 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
4803 /* Read a second line. */
4804 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
4810 /* Close the file. */
4813 /* If the header is not what we expect, or is too short, bail out. */
4814 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
4817 /* Now, we have a real MD5, read it into the array. */
4818 for (n = 0; n < 16; n++)
4822 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
4832 /* Given module, dump it to disk. If there was an error while
4833 processing the module, dump_flag will be set to zero and we delete
4834 the module file, even if it was already there. */
4837 gfc_dump_module (const char *name, int dump_flag)
4840 char *filename, *filename_tmp, *p;
4843 unsigned char md5_new[16], md5_old[16];
4845 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
4846 if (gfc_option.module_dir != NULL)
4848 n += strlen (gfc_option.module_dir);
4849 filename = (char *) alloca (n);
4850 strcpy (filename, gfc_option.module_dir);
4851 strcat (filename, name);
4855 filename = (char *) alloca (n);
4856 strcpy (filename, name);
4858 strcat (filename, MODULE_EXTENSION);
4860 /* Name of the temporary file used to write the module. */
4861 filename_tmp = (char *) alloca (n + 1);
4862 strcpy (filename_tmp, filename);
4863 strcat (filename_tmp, "0");
4865 /* There was an error while processing the module. We delete the
4866 module file, even if it was already there. */
4873 /* Write the module to the temporary file. */
4874 module_fp = fopen (filename_tmp, "w");
4875 if (module_fp == NULL)
4876 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
4877 filename_tmp, strerror (errno));
4879 /* Write the header, including space reserved for the MD5 sum. */
4883 *strchr (p, '\n') = '\0';
4885 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
4886 "MD5:", MOD_VERSION, gfc_source_file, p);
4887 fgetpos (module_fp, &md5_pos);
4888 fputs ("00000000000000000000000000000000 -- "
4889 "If you edit this, you'll get what you deserve.\n\n", module_fp);
4891 /* Initialize the MD5 context that will be used for output. */
4892 md5_init_ctx (&ctx);
4894 /* Write the module itself. */
4896 strcpy (module_name, name);
4902 free_pi_tree (pi_root);
4907 /* Write the MD5 sum to the header of the module file. */
4908 md5_finish_ctx (&ctx, md5_new);
4909 fsetpos (module_fp, &md5_pos);
4910 for (n = 0; n < 16; n++)
4911 fprintf (module_fp, "%02x", md5_new[n]);
4913 if (fclose (module_fp))
4914 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
4915 filename_tmp, strerror (errno));
4917 /* Read the MD5 from the header of the old module file and compare. */
4918 if (read_md5_from_module_file (filename, md5_old) != 0
4919 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
4921 /* Module file have changed, replace the old one. */
4922 if (unlink (filename) && errno != ENOENT)
4923 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
4925 if (rename (filename_tmp, filename))
4926 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
4927 filename_tmp, filename, strerror (errno));
4931 if (unlink (filename_tmp))
4932 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
4933 filename_tmp, strerror (errno));
4939 sort_iso_c_rename_list (void)
4941 gfc_use_rename *tmp_list = NULL;
4942 gfc_use_rename *curr;
4943 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
4947 for (curr = gfc_rename_list; curr; curr = curr->next)
4949 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
4950 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
4952 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4953 "intrinsic module ISO_C_BINDING.", curr->use_name,
4957 /* Put it in the list. */
4958 kinds_used[c_kind] = curr;
4961 /* Make a new (sorted) rename list. */
4963 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
4966 if (i < ISOCBINDING_NUMBER)
4968 tmp_list = kinds_used[i];
4972 for (; i < ISOCBINDING_NUMBER; i++)
4973 if (kinds_used[i] != NULL)
4975 curr->next = kinds_used[i];
4981 gfc_rename_list = tmp_list;
4985 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
4986 the current namespace for all named constants, pointer types, and
4987 procedures in the module unless the only clause was used or a rename
4988 list was provided. */
4991 import_iso_c_binding_module (void)
4993 gfc_symbol *mod_sym = NULL;
4994 gfc_symtree *mod_symtree = NULL;
4995 const char *iso_c_module_name = "__iso_c_binding";
5000 /* Look only in the current namespace. */
5001 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5003 if (mod_symtree == NULL)
5005 /* symtree doesn't already exist in current namespace. */
5006 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5009 if (mod_symtree != NULL)
5010 mod_sym = mod_symtree->n.sym;
5012 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5013 "create symbol for %s", iso_c_module_name);
5015 mod_sym->attr.flavor = FL_MODULE;
5016 mod_sym->attr.intrinsic = 1;
5017 mod_sym->module = gfc_get_string (iso_c_module_name);
5018 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5021 /* Generate the symbols for the named constants representing
5022 the kinds for intrinsic data types. */
5025 /* Sort the rename list because there are dependencies between types
5026 and procedures (e.g., c_loc needs c_ptr). */
5027 sort_iso_c_rename_list ();
5029 for (u = gfc_rename_list; u; u = u->next)
5031 i = get_c_kind (u->use_name, c_interop_kinds_table);
5033 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
5035 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5036 "intrinsic module ISO_C_BINDING.", u->use_name,
5041 generate_isocbinding_symbol (iso_c_module_name,
5042 (iso_c_binding_symbol) i,
5048 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5051 for (u = gfc_rename_list; u; u = u->next)
5053 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5055 local_name = u->local_name;
5060 generate_isocbinding_symbol (iso_c_module_name,
5061 (iso_c_binding_symbol) i,
5065 for (u = gfc_rename_list; u; u = u->next)
5070 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5071 "module ISO_C_BINDING", u->use_name, &u->where);
5077 /* Add an integer named constant from a given module. */
5080 create_int_parameter (const char *name, int value, const char *modname,
5081 intmod_id module, int id)
5083 gfc_symtree *tmp_symtree;
5086 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5087 if (tmp_symtree != NULL)
5089 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5092 gfc_error ("Symbol '%s' already declared", name);
5095 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5096 sym = tmp_symtree->n.sym;
5098 sym->module = gfc_get_string (modname);
5099 sym->attr.flavor = FL_PARAMETER;
5100 sym->ts.type = BT_INTEGER;
5101 sym->ts.kind = gfc_default_integer_kind;
5102 sym->value = gfc_int_expr (value);
5103 sym->attr.use_assoc = 1;
5104 sym->from_intmod = module;
5105 sym->intmod_sym_id = id;
5109 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5112 use_iso_fortran_env_module (void)
5114 static char mod[] = "iso_fortran_env";
5115 const char *local_name;
5117 gfc_symbol *mod_sym;
5118 gfc_symtree *mod_symtree;
5121 intmod_sym symbol[] = {
5122 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5123 #include "iso-fortran-env.def"
5125 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5128 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5129 #include "iso-fortran-env.def"
5132 /* Generate the symbol for the module itself. */
5133 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5134 if (mod_symtree == NULL)
5136 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5137 gcc_assert (mod_symtree);
5138 mod_sym = mod_symtree->n.sym;
5140 mod_sym->attr.flavor = FL_MODULE;
5141 mod_sym->attr.intrinsic = 1;
5142 mod_sym->module = gfc_get_string (mod);
5143 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5146 if (!mod_symtree->n.sym->attr.intrinsic)
5147 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5148 "non-intrinsic module name used previously", mod);
5150 /* Generate the symbols for the module integer named constants. */
5152 for (u = gfc_rename_list; u; u = u->next)
5154 for (i = 0; symbol[i].name; i++)
5155 if (strcmp (symbol[i].name, u->use_name) == 0)
5158 if (symbol[i].name == NULL)
5160 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5161 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
5166 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5167 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5168 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5169 "from intrinsic module ISO_FORTRAN_ENV at %L is "
5170 "incompatible with option %s", &u->where,
5171 gfc_option.flag_default_integer
5172 ? "-fdefault-integer-8" : "-fdefault-real-8");
5174 create_int_parameter (u->local_name[0] ? u->local_name
5176 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5181 for (i = 0; symbol[i].name; i++)
5184 for (u = gfc_rename_list; u; u = u->next)
5186 if (strcmp (symbol[i].name, u->use_name) == 0)
5188 local_name = u->local_name;
5194 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5195 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5196 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5197 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5198 "incompatible with option %s",
5199 gfc_option.flag_default_integer
5200 ? "-fdefault-integer-8" : "-fdefault-real-8");
5202 create_int_parameter (local_name ? local_name : symbol[i].name,
5203 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5207 for (u = gfc_rename_list; u; u = u->next)
5212 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5213 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5219 /* Process a USE directive. */
5222 gfc_use_module (void)
5227 gfc_symtree *mod_symtree;
5228 gfc_use_list *use_stmt;
5230 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5232 strcpy (filename, module_name);
5233 strcat (filename, MODULE_EXTENSION);
5235 /* First, try to find an non-intrinsic module, unless the USE statement
5236 specified that the module is intrinsic. */
5239 module_fp = gfc_open_included_file (filename, true, true);
5241 /* Then, see if it's an intrinsic one, unless the USE statement
5242 specified that the module is non-intrinsic. */
5243 if (module_fp == NULL && !specified_nonint)
5245 if (strcmp (module_name, "iso_fortran_env") == 0
5246 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5247 "intrinsic module at %C") != FAILURE)
5249 use_iso_fortran_env_module ();
5253 if (strcmp (module_name, "iso_c_binding") == 0
5254 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5255 "ISO_C_BINDING module at %C") != FAILURE)
5257 import_iso_c_binding_module();
5261 module_fp = gfc_open_intrinsic_module (filename);
5263 if (module_fp == NULL && specified_int)
5264 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5268 if (module_fp == NULL)
5269 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5270 filename, strerror (errno));
5272 /* Check that we haven't already USEd an intrinsic module with the
5275 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5276 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5277 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5278 "intrinsic module name used previously", module_name);
5285 /* Skip the first two lines of the module, after checking that this is
5286 a gfortran module file. */
5292 bad_module ("Unexpected end of module");
5295 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5296 || (start == 2 && strcmp (atom_name, " module") != 0))
5297 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5301 if (strcmp (atom_name, " version") != 0
5302 || module_char () != ' '
5303 || parse_atom () != ATOM_STRING)
5304 gfc_fatal_error ("Parse error when checking module version"
5305 " for file '%s' opened at %C", filename);
5307 if (strcmp (atom_string, MOD_VERSION))
5309 gfc_fatal_error ("Wrong module version '%s' (expected '"
5310 MOD_VERSION "') for file '%s' opened"
5311 " at %C", atom_string, filename);
5319 /* Make sure we're not reading the same module that we may be building. */
5320 for (p = gfc_state_stack; p; p = p->previous)
5321 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5322 gfc_fatal_error ("Can't USE the same module we're building!");
5325 init_true_name_tree ();
5329 free_true_name (true_name_root);
5330 true_name_root = NULL;
5332 free_pi_tree (pi_root);
5337 use_stmt = gfc_get_use_list ();
5338 use_stmt->module_name = gfc_get_string (module_name);
5339 use_stmt->only_flag = only_flag;
5340 use_stmt->rename = gfc_rename_list;
5341 use_stmt->where = use_locus;
5342 gfc_rename_list = NULL;
5343 use_stmt->next = gfc_current_ns->use_stmts;
5344 gfc_current_ns->use_stmts = use_stmt;
5349 gfc_free_use_stmts (gfc_use_list *use_stmts)
5352 for (; use_stmts; use_stmts = next)
5354 gfc_use_rename *next_rename;
5356 for (; use_stmts->rename; use_stmts->rename = next_rename)
5358 next_rename = use_stmts->rename->next;
5359 gfc_free (use_stmts->rename);
5361 next = use_stmts->next;
5362 gfc_free (use_stmts);
5368 gfc_module_init_2 (void)
5370 last_atom = ATOM_LPAREN;
5375 gfc_module_done_2 (void)