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
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"
79 /* Structure that describes a position within a module file. */
88 /* Structure for list of symbols of intrinsic modules. */
101 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
105 /* The fixup structure lists pointers to pointers that have to
106 be updated when a pointer value becomes known. */
108 typedef struct fixup_t
111 struct fixup_t *next;
116 /* Structure for holding extra info needed for pointers being read. */
118 typedef struct pointer_info
120 BBT_HEADER (pointer_info);
124 /* The first component of each member of the union is the pointer
131 void *pointer; /* Member for doing pointer searches. */
136 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
138 { UNUSED, NEEDED, USED }
140 int ns, referenced, renamed;
143 gfc_symtree *symtree;
144 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
152 { UNREFERENCED = 0, NEEDS_WRITE, WRITTEN }
162 #define gfc_get_pointer_info() XCNEW (pointer_info)
165 /* Local variables */
167 /* The FILE for the module we're reading or writing. */
168 static FILE *module_fp;
170 /* MD5 context structure. */
171 static struct md5_ctx ctx;
173 /* The name of the module we're reading (USE'ing) or writing. */
174 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
176 /* The way the module we're reading was specified. */
177 static bool specified_nonint, specified_int;
179 static int module_line, module_column, only_flag;
181 { IO_INPUT, IO_OUTPUT }
184 static gfc_use_rename *gfc_rename_list;
185 static pointer_info *pi_root;
186 static int symbol_number; /* Counter for assigning symbol numbers */
188 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
189 static bool in_load_equiv;
191 static locus use_locus;
195 /*****************************************************************/
197 /* Pointer/integer conversion. Pointers between structures are stored
198 as integers in the module file. The next couple of subroutines
199 handle this translation for reading and writing. */
201 /* Recursively free the tree of pointer structures. */
204 free_pi_tree (pointer_info *p)
209 if (p->fixup != NULL)
210 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
212 free_pi_tree (p->left);
213 free_pi_tree (p->right);
219 /* Compare pointers when searching by pointer. Used when writing a
223 compare_pointers (void *_sn1, void *_sn2)
225 pointer_info *sn1, *sn2;
227 sn1 = (pointer_info *) _sn1;
228 sn2 = (pointer_info *) _sn2;
230 if (sn1->u.pointer < sn2->u.pointer)
232 if (sn1->u.pointer > sn2->u.pointer)
239 /* Compare integers when searching by integer. Used when reading a
243 compare_integers (void *_sn1, void *_sn2)
245 pointer_info *sn1, *sn2;
247 sn1 = (pointer_info *) _sn1;
248 sn2 = (pointer_info *) _sn2;
250 if (sn1->integer < sn2->integer)
252 if (sn1->integer > sn2->integer)
259 /* Initialize the pointer_info tree. */
268 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
270 /* Pointer 0 is the NULL pointer. */
271 p = gfc_get_pointer_info ();
276 gfc_insert_bbt (&pi_root, p, compare);
278 /* Pointer 1 is the current namespace. */
279 p = gfc_get_pointer_info ();
280 p->u.pointer = gfc_current_ns;
282 p->type = P_NAMESPACE;
284 gfc_insert_bbt (&pi_root, p, compare);
290 /* During module writing, call here with a pointer to something,
291 returning the pointer_info node. */
293 static pointer_info *
294 find_pointer (void *gp)
301 if (p->u.pointer == gp)
303 p = (gp < p->u.pointer) ? p->left : p->right;
310 /* Given a pointer while writing, returns the pointer_info tree node,
311 creating it if it doesn't exist. */
313 static pointer_info *
314 get_pointer (void *gp)
318 p = find_pointer (gp);
322 /* Pointer doesn't have an integer. Give it one. */
323 p = gfc_get_pointer_info ();
326 p->integer = symbol_number++;
328 gfc_insert_bbt (&pi_root, p, compare_pointers);
334 /* Given an integer during reading, find it in the pointer_info tree,
335 creating the node if not found. */
337 static pointer_info *
338 get_integer (int integer)
348 c = compare_integers (&t, p);
352 p = (c < 0) ? p->left : p->right;
358 p = gfc_get_pointer_info ();
359 p->integer = integer;
362 gfc_insert_bbt (&pi_root, p, compare_integers);
368 /* Recursive function to find a pointer within a tree by brute force. */
370 static pointer_info *
371 fp2 (pointer_info *p, const void *target)
378 if (p->u.pointer == target)
381 q = fp2 (p->left, target);
385 return fp2 (p->right, target);
389 /* During reading, find a pointer_info node from the pointer value.
390 This amounts to a brute-force search. */
392 static pointer_info *
393 find_pointer2 (void *p)
395 return fp2 (pi_root, p);
399 /* Resolve any fixups using a known pointer. */
402 resolve_fixups (fixup_t *f, void *gp)
415 /* Call here during module reading when we know what pointer to
416 associate with an integer. Any fixups that exist are resolved at
420 associate_integer_pointer (pointer_info *p, void *gp)
422 if (p->u.pointer != NULL)
423 gfc_internal_error ("associate_integer_pointer(): Already associated");
427 resolve_fixups (p->fixup, gp);
433 /* During module reading, given an integer and a pointer to a pointer,
434 either store the pointer from an already-known value or create a
435 fixup structure in order to store things later. Returns zero if
436 the reference has been actually stored, or nonzero if the reference
437 must be fixed later (i.e., associate_integer_pointer must be called
438 sometime later. Returns the pointer_info structure. */
440 static pointer_info *
441 add_fixup (int integer, void *gp)
447 p = get_integer (integer);
449 if (p->integer == 0 || p->u.pointer != NULL)
452 *cp = (char *) p->u.pointer;
461 f->pointer = (void **) gp;
468 /*****************************************************************/
470 /* Parser related subroutines */
472 /* Free the rename list left behind by a USE statement. */
477 gfc_use_rename *next;
479 for (; gfc_rename_list; gfc_rename_list = next)
481 next = gfc_rename_list->next;
482 gfc_free (gfc_rename_list);
487 /* Match a USE statement. */
492 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
493 gfc_use_rename *tail = NULL, *new_use;
494 interface_type type, type2;
498 specified_int = false;
499 specified_nonint = false;
501 if (gfc_match (" , ") == MATCH_YES)
503 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
505 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
506 "nature in USE statement at %C") == FAILURE)
509 if (strcmp (module_nature, "intrinsic") == 0)
510 specified_int = true;
513 if (strcmp (module_nature, "non_intrinsic") == 0)
514 specified_nonint = true;
517 gfc_error ("Module nature in USE statement at %C shall "
518 "be either INTRINSIC or NON_INTRINSIC");
525 /* Help output a better error message than "Unclassifiable
527 gfc_match (" %n", module_nature);
528 if (strcmp (module_nature, "intrinsic") == 0
529 || strcmp (module_nature, "non_intrinsic") == 0)
530 gfc_error ("\"::\" was expected after module nature at %C "
531 "but was not found");
537 m = gfc_match (" ::");
538 if (m == MATCH_YES &&
539 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
540 "\"USE :: module\" at %C") == FAILURE)
545 m = gfc_match ("% ");
551 use_locus = gfc_current_locus;
553 m = gfc_match_name (module_name);
560 if (gfc_match_eos () == MATCH_YES)
562 if (gfc_match_char (',') != MATCH_YES)
565 if (gfc_match (" only :") == MATCH_YES)
568 if (gfc_match_eos () == MATCH_YES)
573 /* Get a new rename struct and add it to the rename list. */
574 new_use = gfc_get_use_rename ();
575 new_use->where = gfc_current_locus;
578 if (gfc_rename_list == NULL)
579 gfc_rename_list = new_use;
581 tail->next = new_use;
584 /* See what kind of interface we're dealing with. Assume it is
586 new_use->op = INTRINSIC_NONE;
587 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
592 case INTERFACE_NAMELESS:
593 gfc_error ("Missing generic specification in USE statement at %C");
596 case INTERFACE_USER_OP:
597 case INTERFACE_GENERIC:
598 m = gfc_match (" =>");
600 if (type == INTERFACE_USER_OP && m == MATCH_YES
601 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
602 "operators in USE statements at %C")
606 if (type == INTERFACE_USER_OP)
607 new_use->op = INTRINSIC_USER;
612 strcpy (new_use->use_name, name);
615 strcpy (new_use->local_name, name);
616 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
621 if (m == MATCH_ERROR)
629 strcpy (new_use->local_name, name);
631 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
636 if (m == MATCH_ERROR)
640 if (strcmp (new_use->use_name, module_name) == 0
641 || strcmp (new_use->local_name, module_name) == 0)
643 gfc_error ("The name '%s' at %C has already been used as "
644 "an external module name.", module_name);
649 case INTERFACE_INTRINSIC_OP:
657 if (gfc_match_eos () == MATCH_YES)
659 if (gfc_match_char (',') != MATCH_YES)
666 gfc_syntax_error (ST_USE);
674 /* Given a name and a number, inst, return the inst name
675 under which to load this symbol. Returns NULL if this
676 symbol shouldn't be loaded. If inst is zero, returns
677 the number of instances of this name. If interface is
678 true, a user-defined operator is sought, otherwise only
679 non-operators are sought. */
682 find_use_name_n (const char *name, int *inst, bool interface)
688 for (u = gfc_rename_list; u; u = u->next)
690 if (strcmp (u->use_name, name) != 0
691 || (u->op == INTRINSIC_USER && !interface)
692 || (u->op != INTRINSIC_USER && interface))
705 return only_flag ? NULL : name;
709 return (u->local_name[0] != '\0') ? u->local_name : name;
713 /* Given a name, return the name under which to load this symbol.
714 Returns NULL if this symbol shouldn't be loaded. */
717 find_use_name (const char *name, bool interface)
720 return find_use_name_n (name, &i, interface);
724 /* Given a real name, return the number of use names associated with it. */
727 number_use_names (const char *name, bool interface)
731 c = find_use_name_n (name, &i, interface);
736 /* Try to find the operator in the current list. */
738 static gfc_use_rename *
739 find_use_operator (gfc_intrinsic_op op)
743 for (u = gfc_rename_list; u; u = u->next)
751 /*****************************************************************/
753 /* The next couple of subroutines maintain a tree used to avoid a
754 brute-force search for a combination of true name and module name.
755 While symtree names, the name that a particular symbol is known by
756 can changed with USE statements, we still have to keep track of the
757 true names to generate the correct reference, and also avoid
758 loading the same real symbol twice in a program unit.
760 When we start reading, the true name tree is built and maintained
761 as symbols are read. The tree is searched as we load new symbols
762 to see if it already exists someplace in the namespace. */
764 typedef struct true_name
766 BBT_HEADER (true_name);
771 static true_name *true_name_root;
774 /* Compare two true_name structures. */
777 compare_true_names (void *_t1, void *_t2)
782 t1 = (true_name *) _t1;
783 t2 = (true_name *) _t2;
785 c = ((t1->sym->module > t2->sym->module)
786 - (t1->sym->module < t2->sym->module));
790 return strcmp (t1->sym->name, t2->sym->name);
794 /* Given a true name, search the true name tree to see if it exists
795 within the main namespace. */
798 find_true_name (const char *name, const char *module)
804 sym.name = gfc_get_string (name);
806 sym.module = gfc_get_string (module);
814 c = compare_true_names ((void *) (&t), (void *) p);
818 p = (c < 0) ? p->left : p->right;
825 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
828 add_true_name (gfc_symbol *sym)
832 t = XCNEW (true_name);
835 gfc_insert_bbt (&true_name_root, t, compare_true_names);
839 /* Recursive function to build the initial true name tree by
840 recursively traversing the current namespace. */
843 build_tnt (gfc_symtree *st)
848 build_tnt (st->left);
849 build_tnt (st->right);
851 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
854 add_true_name (st->n.sym);
858 /* Initialize the true name tree with the current namespace. */
861 init_true_name_tree (void)
863 true_name_root = NULL;
864 build_tnt (gfc_current_ns->sym_root);
868 /* Recursively free a true name tree node. */
871 free_true_name (true_name *t)
875 free_true_name (t->left);
876 free_true_name (t->right);
882 /*****************************************************************/
884 /* Module reading and writing. */
888 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
892 static atom_type last_atom;
895 /* The name buffer must be at least as long as a symbol name. Right
896 now it's not clear how we're going to store numeric constants--
897 probably as a hexadecimal string, since this will allow the exact
898 number to be preserved (this can't be done by a decimal
899 representation). Worry about that later. TODO! */
901 #define MAX_ATOM_SIZE 100
904 static char *atom_string, atom_name[MAX_ATOM_SIZE];
907 /* Report problems with a module. Error reporting is not very
908 elaborate, since this sorts of errors shouldn't really happen.
909 This subroutine never returns. */
911 static void bad_module (const char *) ATTRIBUTE_NORETURN;
914 bad_module (const char *msgid)
921 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
922 module_name, module_line, module_column, msgid);
925 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
926 module_name, module_line, module_column, msgid);
929 gfc_fatal_error ("Module %s at line %d column %d: %s",
930 module_name, module_line, module_column, msgid);
936 /* Set the module's input pointer. */
939 set_module_locus (module_locus *m)
941 module_column = m->column;
942 module_line = m->line;
943 fsetpos (module_fp, &m->pos);
947 /* Get the module's input pointer so that we can restore it later. */
950 get_module_locus (module_locus *m)
952 m->column = module_column;
953 m->line = module_line;
954 fgetpos (module_fp, &m->pos);
958 /* Get the next character in the module, updating our reckoning of
966 c = getc (module_fp);
969 bad_module ("Unexpected EOF");
982 /* Parse a string constant. The delimiter is guaranteed to be a
992 get_module_locus (&start);
996 /* See how long the string is. */
1001 bad_module ("Unexpected end of module in string constant");
1019 set_module_locus (&start);
1021 atom_string = p = XCNEWVEC (char, len + 1);
1023 for (; len > 0; len--)
1027 module_char (); /* Guaranteed to be another \'. */
1031 module_char (); /* Terminating \'. */
1032 *p = '\0'; /* C-style string for debug purposes. */
1036 /* Parse a small integer. */
1039 parse_integer (int c)
1047 get_module_locus (&m);
1053 atom_int = 10 * atom_int + c - '0';
1054 if (atom_int > 99999999)
1055 bad_module ("Integer overflow");
1058 set_module_locus (&m);
1076 get_module_locus (&m);
1081 if (!ISALNUM (c) && c != '_' && c != '-')
1085 if (++len > GFC_MAX_SYMBOL_LEN)
1086 bad_module ("Name too long");
1091 fseek (module_fp, -1, SEEK_CUR);
1092 module_column = m.column + len - 1;
1099 /* Read the next atom in the module's input stream. */
1110 while (c == ' ' || c == '\r' || c == '\n');
1135 return ATOM_INTEGER;
1193 bad_module ("Bad name");
1200 /* Peek at the next atom on the input. */
1208 get_module_locus (&m);
1211 if (a == ATOM_STRING)
1212 gfc_free (atom_string);
1214 set_module_locus (&m);
1219 /* Read the next atom from the input, requiring that it be a
1223 require_atom (atom_type type)
1229 get_module_locus (&m);
1237 p = _("Expected name");
1240 p = _("Expected left parenthesis");
1243 p = _("Expected right parenthesis");
1246 p = _("Expected integer");
1249 p = _("Expected string");
1252 gfc_internal_error ("require_atom(): bad atom type required");
1255 set_module_locus (&m);
1261 /* Given a pointer to an mstring array, require that the current input
1262 be one of the strings in the array. We return the enum value. */
1265 find_enum (const mstring *m)
1269 i = gfc_string2code (m, atom_name);
1273 bad_module ("find_enum(): Enum not found");
1279 /**************** Module output subroutines ***************************/
1281 /* Output a character to a module file. */
1284 write_char (char out)
1286 if (putc (out, module_fp) == EOF)
1287 gfc_fatal_error ("Error writing modules file: %s", strerror (errno));
1289 /* Add this to our MD5. */
1290 md5_process_bytes (&out, sizeof (out), &ctx);
1302 /* Write an atom to a module. The line wrapping isn't perfect, but it
1303 should work most of the time. This isn't that big of a deal, since
1304 the file really isn't meant to be read by people anyway. */
1307 write_atom (atom_type atom, const void *v)
1317 p = (const char *) v;
1329 i = *((const int *) v);
1331 gfc_internal_error ("write_atom(): Writing negative integer");
1333 sprintf (buffer, "%d", i);
1338 gfc_internal_error ("write_atom(): Trying to write dab atom");
1342 if(p == NULL || *p == '\0')
1347 if (atom != ATOM_RPAREN)
1349 if (module_column + len > 72)
1354 if (last_atom != ATOM_LPAREN && module_column != 1)
1359 if (atom == ATOM_STRING)
1362 while (p != NULL && *p)
1364 if (atom == ATOM_STRING && *p == '\'')
1369 if (atom == ATOM_STRING)
1377 /***************** Mid-level I/O subroutines *****************/
1379 /* These subroutines let their caller read or write atoms without
1380 caring about which of the two is actually happening. This lets a
1381 subroutine concentrate on the actual format of the data being
1384 static void mio_expr (gfc_expr **);
1385 pointer_info *mio_symbol_ref (gfc_symbol **);
1386 pointer_info *mio_interface_rest (gfc_interface **);
1387 static void mio_symtree_ref (gfc_symtree **);
1389 /* Read or write an enumerated value. On writing, we return the input
1390 value for the convenience of callers. We avoid using an integer
1391 pointer because enums are sometimes inside bitfields. */
1394 mio_name (int t, const mstring *m)
1396 if (iomode == IO_OUTPUT)
1397 write_atom (ATOM_NAME, gfc_code2string (m, t));
1400 require_atom (ATOM_NAME);
1407 /* Specialization of mio_name. */
1409 #define DECL_MIO_NAME(TYPE) \
1410 static inline TYPE \
1411 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1413 return (TYPE) mio_name ((int) t, m); \
1415 #define MIO_NAME(TYPE) mio_name_##TYPE
1420 if (iomode == IO_OUTPUT)
1421 write_atom (ATOM_LPAREN, NULL);
1423 require_atom (ATOM_LPAREN);
1430 if (iomode == IO_OUTPUT)
1431 write_atom (ATOM_RPAREN, NULL);
1433 require_atom (ATOM_RPAREN);
1438 mio_integer (int *ip)
1440 if (iomode == IO_OUTPUT)
1441 write_atom (ATOM_INTEGER, ip);
1444 require_atom (ATOM_INTEGER);
1450 /* Read or write a character pointer that points to a string on the heap. */
1453 mio_allocated_string (const char *s)
1455 if (iomode == IO_OUTPUT)
1457 write_atom (ATOM_STRING, s);
1462 require_atom (ATOM_STRING);
1468 /* Functions for quoting and unquoting strings. */
1471 quote_string (const gfc_char_t *s, const size_t slength)
1473 const gfc_char_t *p;
1477 /* Calculate the length we'll need: a backslash takes two ("\\"),
1478 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1479 for (p = s, i = 0; i < slength; p++, i++)
1483 else if (!gfc_wide_is_printable (*p))
1489 q = res = XCNEWVEC (char, len + 1);
1490 for (p = s, i = 0; i < slength; p++, i++)
1493 *q++ = '\\', *q++ = '\\';
1494 else if (!gfc_wide_is_printable (*p))
1496 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1497 (unsigned HOST_WIDE_INT) *p);
1501 *q++ = (unsigned char) *p;
1509 unquote_string (const char *s)
1515 for (p = s, len = 0; *p; p++, len++)
1522 else if (p[1] == 'U')
1523 p += 9; /* That is a "\U????????". */
1525 gfc_internal_error ("unquote_string(): got bad string");
1528 res = gfc_get_wide_string (len + 1);
1529 for (i = 0, p = s; i < len; i++, p++)
1534 res[i] = (unsigned char) *p;
1535 else if (p[1] == '\\')
1537 res[i] = (unsigned char) '\\';
1542 /* We read the 8-digits hexadecimal constant that follows. */
1547 gcc_assert (p[1] == 'U');
1548 for (j = 0; j < 8; j++)
1551 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1565 /* Read or write a character pointer that points to a wide string on the
1566 heap, performing quoting/unquoting of nonprintable characters using the
1567 form \U???????? (where each ? is a hexadecimal digit).
1568 Length is the length of the string, only known and used in output mode. */
1570 static const gfc_char_t *
1571 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1573 if (iomode == IO_OUTPUT)
1575 char *quoted = quote_string (s, length);
1576 write_atom (ATOM_STRING, quoted);
1582 gfc_char_t *unquoted;
1584 require_atom (ATOM_STRING);
1585 unquoted = unquote_string (atom_string);
1586 gfc_free (atom_string);
1592 /* Read or write a string that is in static memory. */
1595 mio_pool_string (const char **stringp)
1597 /* TODO: one could write the string only once, and refer to it via a
1600 /* As a special case we have to deal with a NULL string. This
1601 happens for the 'module' member of 'gfc_symbol's that are not in a
1602 module. We read / write these as the empty string. */
1603 if (iomode == IO_OUTPUT)
1605 const char *p = *stringp == NULL ? "" : *stringp;
1606 write_atom (ATOM_STRING, p);
1610 require_atom (ATOM_STRING);
1611 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1612 gfc_free (atom_string);
1617 /* Read or write a string that is inside of some already-allocated
1621 mio_internal_string (char *string)
1623 if (iomode == IO_OUTPUT)
1624 write_atom (ATOM_STRING, string);
1627 require_atom (ATOM_STRING);
1628 strcpy (string, atom_string);
1629 gfc_free (atom_string);
1635 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1636 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1637 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1638 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1639 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE, AB_ALLOC_COMP,
1640 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1641 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1642 AB_EXTENSION, AB_PROCEDURE, AB_PROC_POINTER
1646 static const mstring attr_bits[] =
1648 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1649 minit ("DIMENSION", AB_DIMENSION),
1650 minit ("EXTERNAL", AB_EXTERNAL),
1651 minit ("INTRINSIC", AB_INTRINSIC),
1652 minit ("OPTIONAL", AB_OPTIONAL),
1653 minit ("POINTER", AB_POINTER),
1654 minit ("VOLATILE", AB_VOLATILE),
1655 minit ("TARGET", AB_TARGET),
1656 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1657 minit ("DUMMY", AB_DUMMY),
1658 minit ("RESULT", AB_RESULT),
1659 minit ("DATA", AB_DATA),
1660 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1661 minit ("IN_COMMON", AB_IN_COMMON),
1662 minit ("FUNCTION", AB_FUNCTION),
1663 minit ("SUBROUTINE", AB_SUBROUTINE),
1664 minit ("SEQUENCE", AB_SEQUENCE),
1665 minit ("ELEMENTAL", AB_ELEMENTAL),
1666 minit ("PURE", AB_PURE),
1667 minit ("RECURSIVE", AB_RECURSIVE),
1668 minit ("GENERIC", AB_GENERIC),
1669 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1670 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1671 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1672 minit ("IS_BIND_C", AB_IS_BIND_C),
1673 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1674 minit ("IS_ISO_C", AB_IS_ISO_C),
1675 minit ("VALUE", AB_VALUE),
1676 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1677 minit ("POINTER_COMP", AB_POINTER_COMP),
1678 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1679 minit ("ZERO_COMP", AB_ZERO_COMP),
1680 minit ("PROTECTED", AB_PROTECTED),
1681 minit ("ABSTRACT", AB_ABSTRACT),
1682 minit ("EXTENSION", AB_EXTENSION),
1683 minit ("PROCEDURE", AB_PROCEDURE),
1684 minit ("PROC_POINTER", AB_PROC_POINTER),
1688 /* For binding attributes. */
1689 static const mstring binding_passing[] =
1692 minit ("NOPASS", 1),
1695 static const mstring binding_overriding[] =
1697 minit ("OVERRIDABLE", 0),
1698 minit ("NON_OVERRIDABLE", 1),
1701 static const mstring binding_generic[] =
1703 minit ("SPECIFIC", 0),
1704 minit ("GENERIC", 1),
1709 /* Specialization of mio_name. */
1710 DECL_MIO_NAME (ab_attribute)
1711 DECL_MIO_NAME (ar_type)
1712 DECL_MIO_NAME (array_type)
1714 DECL_MIO_NAME (expr_t)
1715 DECL_MIO_NAME (gfc_access)
1716 DECL_MIO_NAME (gfc_intrinsic_op)
1717 DECL_MIO_NAME (ifsrc)
1718 DECL_MIO_NAME (save_state)
1719 DECL_MIO_NAME (procedure_type)
1720 DECL_MIO_NAME (ref_type)
1721 DECL_MIO_NAME (sym_flavor)
1722 DECL_MIO_NAME (sym_intent)
1723 #undef DECL_MIO_NAME
1725 /* Symbol attributes are stored in list with the first three elements
1726 being the enumerated fields, while the remaining elements (if any)
1727 indicate the individual attribute bits. The access field is not
1728 saved-- it controls what symbols are exported when a module is
1732 mio_symbol_attribute (symbol_attribute *attr)
1738 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1739 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1740 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1741 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1742 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1744 if (iomode == IO_OUTPUT)
1746 if (attr->allocatable)
1747 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1748 if (attr->dimension)
1749 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1751 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1752 if (attr->intrinsic)
1753 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1755 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1757 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1758 if (attr->is_protected)
1759 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1761 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1762 if (attr->volatile_)
1763 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1765 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1766 if (attr->threadprivate)
1767 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1769 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1771 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1772 /* We deliberately don't preserve the "entry" flag. */
1775 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1776 if (attr->in_namelist)
1777 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1778 if (attr->in_common)
1779 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1782 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1783 if (attr->subroutine)
1784 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1786 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1788 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1791 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1792 if (attr->elemental)
1793 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1795 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1796 if (attr->recursive)
1797 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1798 if (attr->always_explicit)
1799 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1800 if (attr->cray_pointer)
1801 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1802 if (attr->cray_pointee)
1803 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1804 if (attr->is_bind_c)
1805 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1806 if (attr->is_c_interop)
1807 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1809 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1810 if (attr->alloc_comp)
1811 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1812 if (attr->pointer_comp)
1813 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1814 if (attr->private_comp)
1815 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1816 if (attr->zero_comp)
1817 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1818 if (attr->extension)
1819 MIO_NAME (ab_attribute) (AB_EXTENSION, attr_bits);
1820 if (attr->procedure)
1821 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1822 if (attr->proc_pointer)
1823 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1833 if (t == ATOM_RPAREN)
1836 bad_module ("Expected attribute bit name");
1838 switch ((ab_attribute) find_enum (attr_bits))
1840 case AB_ALLOCATABLE:
1841 attr->allocatable = 1;
1844 attr->dimension = 1;
1850 attr->intrinsic = 1;
1859 attr->is_protected = 1;
1865 attr->volatile_ = 1;
1870 case AB_THREADPRIVATE:
1871 attr->threadprivate = 1;
1882 case AB_IN_NAMELIST:
1883 attr->in_namelist = 1;
1886 attr->in_common = 1;
1892 attr->subroutine = 1;
1904 attr->elemental = 1;
1910 attr->recursive = 1;
1912 case AB_ALWAYS_EXPLICIT:
1913 attr->always_explicit = 1;
1915 case AB_CRAY_POINTER:
1916 attr->cray_pointer = 1;
1918 case AB_CRAY_POINTEE:
1919 attr->cray_pointee = 1;
1922 attr->is_bind_c = 1;
1924 case AB_IS_C_INTEROP:
1925 attr->is_c_interop = 1;
1931 attr->alloc_comp = 1;
1933 case AB_POINTER_COMP:
1934 attr->pointer_comp = 1;
1936 case AB_PRIVATE_COMP:
1937 attr->private_comp = 1;
1940 attr->zero_comp = 1;
1943 attr->extension = 1;
1946 attr->procedure = 1;
1948 case AB_PROC_POINTER:
1949 attr->proc_pointer = 1;
1957 static const mstring bt_types[] = {
1958 minit ("INTEGER", BT_INTEGER),
1959 minit ("REAL", BT_REAL),
1960 minit ("COMPLEX", BT_COMPLEX),
1961 minit ("LOGICAL", BT_LOGICAL),
1962 minit ("CHARACTER", BT_CHARACTER),
1963 minit ("DERIVED", BT_DERIVED),
1964 minit ("PROCEDURE", BT_PROCEDURE),
1965 minit ("UNKNOWN", BT_UNKNOWN),
1966 minit ("VOID", BT_VOID),
1972 mio_charlen (gfc_charlen **clp)
1978 if (iomode == IO_OUTPUT)
1982 mio_expr (&cl->length);
1986 if (peek_atom () != ATOM_RPAREN)
1988 cl = gfc_get_charlen ();
1989 mio_expr (&cl->length);
1993 cl->next = gfc_current_ns->cl_list;
1994 gfc_current_ns->cl_list = cl;
2002 /* See if a name is a generated name. */
2005 check_unique_name (const char *name)
2007 return *name == '@';
2012 mio_typespec (gfc_typespec *ts)
2016 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2018 if (ts->type != BT_DERIVED)
2019 mio_integer (&ts->kind);
2021 mio_symbol_ref (&ts->derived);
2023 /* Add info for C interop and is_iso_c. */
2024 mio_integer (&ts->is_c_interop);
2025 mio_integer (&ts->is_iso_c);
2027 /* If the typespec is for an identifier either from iso_c_binding, or
2028 a constant that was initialized to an identifier from it, use the
2029 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2031 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2033 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2035 if (ts->type != BT_CHARACTER)
2037 /* ts->cl is only valid for BT_CHARACTER. */
2042 mio_charlen (&ts->cl);
2048 static const mstring array_spec_types[] = {
2049 minit ("EXPLICIT", AS_EXPLICIT),
2050 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2051 minit ("DEFERRED", AS_DEFERRED),
2052 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2058 mio_array_spec (gfc_array_spec **asp)
2065 if (iomode == IO_OUTPUT)
2073 if (peek_atom () == ATOM_RPAREN)
2079 *asp = as = gfc_get_array_spec ();
2082 mio_integer (&as->rank);
2083 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2085 for (i = 0; i < as->rank; i++)
2087 mio_expr (&as->lower[i]);
2088 mio_expr (&as->upper[i]);
2096 /* Given a pointer to an array reference structure (which lives in a
2097 gfc_ref structure), find the corresponding array specification
2098 structure. Storing the pointer in the ref structure doesn't quite
2099 work when loading from a module. Generating code for an array
2100 reference also needs more information than just the array spec. */
2102 static const mstring array_ref_types[] = {
2103 minit ("FULL", AR_FULL),
2104 minit ("ELEMENT", AR_ELEMENT),
2105 minit ("SECTION", AR_SECTION),
2111 mio_array_ref (gfc_array_ref *ar)
2116 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2117 mio_integer (&ar->dimen);
2125 for (i = 0; i < ar->dimen; i++)
2126 mio_expr (&ar->start[i]);
2131 for (i = 0; i < ar->dimen; i++)
2133 mio_expr (&ar->start[i]);
2134 mio_expr (&ar->end[i]);
2135 mio_expr (&ar->stride[i]);
2141 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2144 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2145 we can't call mio_integer directly. Instead loop over each element
2146 and cast it to/from an integer. */
2147 if (iomode == IO_OUTPUT)
2149 for (i = 0; i < ar->dimen; i++)
2151 int tmp = (int)ar->dimen_type[i];
2152 write_atom (ATOM_INTEGER, &tmp);
2157 for (i = 0; i < ar->dimen; i++)
2159 require_atom (ATOM_INTEGER);
2160 ar->dimen_type[i] = atom_int;
2164 if (iomode == IO_INPUT)
2166 ar->where = gfc_current_locus;
2168 for (i = 0; i < ar->dimen; i++)
2169 ar->c_where[i] = gfc_current_locus;
2176 /* Saves or restores a pointer. The pointer is converted back and
2177 forth from an integer. We return the pointer_info pointer so that
2178 the caller can take additional action based on the pointer type. */
2180 static pointer_info *
2181 mio_pointer_ref (void *gp)
2185 if (iomode == IO_OUTPUT)
2187 p = get_pointer (*((char **) gp));
2188 write_atom (ATOM_INTEGER, &p->integer);
2192 require_atom (ATOM_INTEGER);
2193 p = add_fixup (atom_int, gp);
2200 /* Save and load references to components that occur within
2201 expressions. We have to describe these references by a number and
2202 by name. The number is necessary for forward references during
2203 reading, and the name is necessary if the symbol already exists in
2204 the namespace and is not loaded again. */
2207 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2209 char name[GFC_MAX_SYMBOL_LEN + 1];
2213 p = mio_pointer_ref (cp);
2214 if (p->type == P_UNKNOWN)
2215 p->type = P_COMPONENT;
2217 if (iomode == IO_OUTPUT)
2218 mio_pool_string (&(*cp)->name);
2221 mio_internal_string (name);
2223 /* It can happen that a component reference can be read before the
2224 associated derived type symbol has been loaded. Return now and
2225 wait for a later iteration of load_needed. */
2229 if (sym->components != NULL && p->u.pointer == NULL)
2231 /* Symbol already loaded, so search by name. */
2232 for (q = sym->components; q; q = q->next)
2233 if (strcmp (q->name, name) == 0)
2237 gfc_internal_error ("mio_component_ref(): Component not found");
2239 associate_integer_pointer (p, q);
2242 /* Make sure this symbol will eventually be loaded. */
2243 p = find_pointer2 (sym);
2244 if (p->u.rsym.state == UNUSED)
2245 p->u.rsym.state = NEEDED;
2251 mio_component (gfc_component *c)
2258 if (iomode == IO_OUTPUT)
2260 p = get_pointer (c);
2261 mio_integer (&p->integer);
2266 p = get_integer (n);
2267 associate_integer_pointer (p, c);
2270 if (p->type == P_UNKNOWN)
2271 p->type = P_COMPONENT;
2273 mio_pool_string (&c->name);
2274 mio_typespec (&c->ts);
2275 mio_array_spec (&c->as);
2277 mio_symbol_attribute (&c->attr);
2278 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2280 mio_expr (&c->initializer);
2286 mio_component_list (gfc_component **cp)
2288 gfc_component *c, *tail;
2292 if (iomode == IO_OUTPUT)
2294 for (c = *cp; c; c = c->next)
2304 if (peek_atom () == ATOM_RPAREN)
2307 c = gfc_get_component ();
2324 mio_actual_arg (gfc_actual_arglist *a)
2327 mio_pool_string (&a->name);
2328 mio_expr (&a->expr);
2334 mio_actual_arglist (gfc_actual_arglist **ap)
2336 gfc_actual_arglist *a, *tail;
2340 if (iomode == IO_OUTPUT)
2342 for (a = *ap; a; a = a->next)
2352 if (peek_atom () != ATOM_LPAREN)
2355 a = gfc_get_actual_arglist ();
2371 /* Read and write formal argument lists. */
2374 mio_formal_arglist (gfc_symbol *sym)
2376 gfc_formal_arglist *f, *tail;
2380 if (iomode == IO_OUTPUT)
2382 for (f = sym->formal; f; f = f->next)
2383 mio_symbol_ref (&f->sym);
2387 sym->formal = tail = NULL;
2389 while (peek_atom () != ATOM_RPAREN)
2391 f = gfc_get_formal_arglist ();
2392 mio_symbol_ref (&f->sym);
2394 if (sym->formal == NULL)
2407 /* Save or restore a reference to a symbol node. */
2410 mio_symbol_ref (gfc_symbol **symp)
2414 p = mio_pointer_ref (symp);
2415 if (p->type == P_UNKNOWN)
2418 if (iomode == IO_OUTPUT)
2420 if (p->u.wsym.state == UNREFERENCED)
2421 p->u.wsym.state = NEEDS_WRITE;
2425 if (p->u.rsym.state == UNUSED)
2426 p->u.rsym.state = NEEDED;
2432 /* Save or restore a reference to a symtree node. */
2435 mio_symtree_ref (gfc_symtree **stp)
2440 if (iomode == IO_OUTPUT)
2441 mio_symbol_ref (&(*stp)->n.sym);
2444 require_atom (ATOM_INTEGER);
2445 p = get_integer (atom_int);
2447 /* An unused equivalence member; make a symbol and a symtree
2449 if (in_load_equiv && p->u.rsym.symtree == NULL)
2451 /* Since this is not used, it must have a unique name. */
2452 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2454 /* Make the symbol. */
2455 if (p->u.rsym.sym == NULL)
2457 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2459 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2462 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2463 p->u.rsym.symtree->n.sym->refs++;
2464 p->u.rsym.referenced = 1;
2466 /* If the symbol is PRIVATE and in COMMON, load_commons will
2467 generate a fixup symbol, which must be associated. */
2469 resolve_fixups (p->fixup, p->u.rsym.sym);
2473 if (p->type == P_UNKNOWN)
2476 if (p->u.rsym.state == UNUSED)
2477 p->u.rsym.state = NEEDED;
2479 if (p->u.rsym.symtree != NULL)
2481 *stp = p->u.rsym.symtree;
2485 f = XCNEW (fixup_t);
2487 f->next = p->u.rsym.stfixup;
2488 p->u.rsym.stfixup = f;
2490 f->pointer = (void **) stp;
2497 mio_iterator (gfc_iterator **ip)
2503 if (iomode == IO_OUTPUT)
2510 if (peek_atom () == ATOM_RPAREN)
2516 *ip = gfc_get_iterator ();
2521 mio_expr (&iter->var);
2522 mio_expr (&iter->start);
2523 mio_expr (&iter->end);
2524 mio_expr (&iter->step);
2532 mio_constructor (gfc_constructor **cp)
2534 gfc_constructor *c, *tail;
2538 if (iomode == IO_OUTPUT)
2540 for (c = *cp; c; c = c->next)
2543 mio_expr (&c->expr);
2544 mio_iterator (&c->iterator);
2553 while (peek_atom () != ATOM_RPAREN)
2555 c = gfc_get_constructor ();
2565 mio_expr (&c->expr);
2566 mio_iterator (&c->iterator);
2575 static const mstring ref_types[] = {
2576 minit ("ARRAY", REF_ARRAY),
2577 minit ("COMPONENT", REF_COMPONENT),
2578 minit ("SUBSTRING", REF_SUBSTRING),
2584 mio_ref (gfc_ref **rp)
2591 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2596 mio_array_ref (&r->u.ar);
2600 mio_symbol_ref (&r->u.c.sym);
2601 mio_component_ref (&r->u.c.component, r->u.c.sym);
2605 mio_expr (&r->u.ss.start);
2606 mio_expr (&r->u.ss.end);
2607 mio_charlen (&r->u.ss.length);
2616 mio_ref_list (gfc_ref **rp)
2618 gfc_ref *ref, *head, *tail;
2622 if (iomode == IO_OUTPUT)
2624 for (ref = *rp; ref; ref = ref->next)
2631 while (peek_atom () != ATOM_RPAREN)
2634 head = tail = gfc_get_ref ();
2637 tail->next = gfc_get_ref ();
2651 /* Read and write an integer value. */
2654 mio_gmp_integer (mpz_t *integer)
2658 if (iomode == IO_INPUT)
2660 if (parse_atom () != ATOM_STRING)
2661 bad_module ("Expected integer string");
2663 mpz_init (*integer);
2664 if (mpz_set_str (*integer, atom_string, 10))
2665 bad_module ("Error converting integer");
2667 gfc_free (atom_string);
2671 p = mpz_get_str (NULL, 10, *integer);
2672 write_atom (ATOM_STRING, p);
2679 mio_gmp_real (mpfr_t *real)
2684 if (iomode == IO_INPUT)
2686 if (parse_atom () != ATOM_STRING)
2687 bad_module ("Expected real string");
2690 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2691 gfc_free (atom_string);
2695 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2697 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2699 write_atom (ATOM_STRING, p);
2704 atom_string = XCNEWVEC (char, strlen (p) + 20);
2706 sprintf (atom_string, "0.%s@%ld", p, exponent);
2708 /* Fix negative numbers. */
2709 if (atom_string[2] == '-')
2711 atom_string[0] = '-';
2712 atom_string[1] = '0';
2713 atom_string[2] = '.';
2716 write_atom (ATOM_STRING, atom_string);
2718 gfc_free (atom_string);
2724 /* Save and restore the shape of an array constructor. */
2727 mio_shape (mpz_t **pshape, int rank)
2733 /* A NULL shape is represented by (). */
2736 if (iomode == IO_OUTPUT)
2748 if (t == ATOM_RPAREN)
2755 shape = gfc_get_shape (rank);
2759 for (n = 0; n < rank; n++)
2760 mio_gmp_integer (&shape[n]);
2766 static const mstring expr_types[] = {
2767 minit ("OP", EXPR_OP),
2768 minit ("FUNCTION", EXPR_FUNCTION),
2769 minit ("CONSTANT", EXPR_CONSTANT),
2770 minit ("VARIABLE", EXPR_VARIABLE),
2771 minit ("SUBSTRING", EXPR_SUBSTRING),
2772 minit ("STRUCTURE", EXPR_STRUCTURE),
2773 minit ("ARRAY", EXPR_ARRAY),
2774 minit ("NULL", EXPR_NULL),
2775 minit ("COMPCALL", EXPR_COMPCALL),
2779 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2780 generic operators, not in expressions. INTRINSIC_USER is also
2781 replaced by the correct function name by the time we see it. */
2783 static const mstring intrinsics[] =
2785 minit ("UPLUS", INTRINSIC_UPLUS),
2786 minit ("UMINUS", INTRINSIC_UMINUS),
2787 minit ("PLUS", INTRINSIC_PLUS),
2788 minit ("MINUS", INTRINSIC_MINUS),
2789 minit ("TIMES", INTRINSIC_TIMES),
2790 minit ("DIVIDE", INTRINSIC_DIVIDE),
2791 minit ("POWER", INTRINSIC_POWER),
2792 minit ("CONCAT", INTRINSIC_CONCAT),
2793 minit ("AND", INTRINSIC_AND),
2794 minit ("OR", INTRINSIC_OR),
2795 minit ("EQV", INTRINSIC_EQV),
2796 minit ("NEQV", INTRINSIC_NEQV),
2797 minit ("EQ_SIGN", INTRINSIC_EQ),
2798 minit ("EQ", INTRINSIC_EQ_OS),
2799 minit ("NE_SIGN", INTRINSIC_NE),
2800 minit ("NE", INTRINSIC_NE_OS),
2801 minit ("GT_SIGN", INTRINSIC_GT),
2802 minit ("GT", INTRINSIC_GT_OS),
2803 minit ("GE_SIGN", INTRINSIC_GE),
2804 minit ("GE", INTRINSIC_GE_OS),
2805 minit ("LT_SIGN", INTRINSIC_LT),
2806 minit ("LT", INTRINSIC_LT_OS),
2807 minit ("LE_SIGN", INTRINSIC_LE),
2808 minit ("LE", INTRINSIC_LE_OS),
2809 minit ("NOT", INTRINSIC_NOT),
2810 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2815 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2818 fix_mio_expr (gfc_expr *e)
2820 gfc_symtree *ns_st = NULL;
2823 if (iomode != IO_OUTPUT)
2828 /* If this is a symtree for a symbol that came from a contained module
2829 namespace, it has a unique name and we should look in the current
2830 namespace to see if the required, non-contained symbol is available
2831 yet. If so, the latter should be written. */
2832 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2833 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2834 e->symtree->n.sym->name);
2836 /* On the other hand, if the existing symbol is the module name or the
2837 new symbol is a dummy argument, do not do the promotion. */
2838 if (ns_st && ns_st->n.sym
2839 && ns_st->n.sym->attr.flavor != FL_MODULE
2840 && !e->symtree->n.sym->attr.dummy)
2843 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2845 /* In some circumstances, a function used in an initialization
2846 expression, in one use associated module, can fail to be
2847 coupled to its symtree when used in a specification
2848 expression in another module. */
2849 fname = e->value.function.esym ? e->value.function.esym->name
2850 : e->value.function.isym->name;
2851 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2856 /* Read and write expressions. The form "()" is allowed to indicate a
2860 mio_expr (gfc_expr **ep)
2868 if (iomode == IO_OUTPUT)
2877 MIO_NAME (expr_t) (e->expr_type, expr_types);
2882 if (t == ATOM_RPAREN)
2889 bad_module ("Expected expression type");
2891 e = *ep = gfc_get_expr ();
2892 e->where = gfc_current_locus;
2893 e->expr_type = (expr_t) find_enum (expr_types);
2896 mio_typespec (&e->ts);
2897 mio_integer (&e->rank);
2901 switch (e->expr_type)
2905 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
2907 switch (e->value.op.op)
2909 case INTRINSIC_UPLUS:
2910 case INTRINSIC_UMINUS:
2912 case INTRINSIC_PARENTHESES:
2913 mio_expr (&e->value.op.op1);
2916 case INTRINSIC_PLUS:
2917 case INTRINSIC_MINUS:
2918 case INTRINSIC_TIMES:
2919 case INTRINSIC_DIVIDE:
2920 case INTRINSIC_POWER:
2921 case INTRINSIC_CONCAT:
2925 case INTRINSIC_NEQV:
2927 case INTRINSIC_EQ_OS:
2929 case INTRINSIC_NE_OS:
2931 case INTRINSIC_GT_OS:
2933 case INTRINSIC_GE_OS:
2935 case INTRINSIC_LT_OS:
2937 case INTRINSIC_LE_OS:
2938 mio_expr (&e->value.op.op1);
2939 mio_expr (&e->value.op.op2);
2943 bad_module ("Bad operator");
2949 mio_symtree_ref (&e->symtree);
2950 mio_actual_arglist (&e->value.function.actual);
2952 if (iomode == IO_OUTPUT)
2954 e->value.function.name
2955 = mio_allocated_string (e->value.function.name);
2956 flag = e->value.function.esym != NULL;
2957 mio_integer (&flag);
2959 mio_symbol_ref (&e->value.function.esym);
2961 write_atom (ATOM_STRING, e->value.function.isym->name);
2965 require_atom (ATOM_STRING);
2966 e->value.function.name = gfc_get_string (atom_string);
2967 gfc_free (atom_string);
2969 mio_integer (&flag);
2971 mio_symbol_ref (&e->value.function.esym);
2974 require_atom (ATOM_STRING);
2975 e->value.function.isym = gfc_find_function (atom_string);
2976 gfc_free (atom_string);
2983 mio_symtree_ref (&e->symtree);
2984 mio_ref_list (&e->ref);
2987 case EXPR_SUBSTRING:
2988 e->value.character.string
2989 = CONST_CAST (gfc_char_t *,
2990 mio_allocated_wide_string (e->value.character.string,
2991 e->value.character.length));
2992 mio_ref_list (&e->ref);
2995 case EXPR_STRUCTURE:
2997 mio_constructor (&e->value.constructor);
2998 mio_shape (&e->shape, e->rank);
3005 mio_gmp_integer (&e->value.integer);
3009 gfc_set_model_kind (e->ts.kind);
3010 mio_gmp_real (&e->value.real);
3014 gfc_set_model_kind (e->ts.kind);
3015 mio_gmp_real (&e->value.complex.r);
3016 mio_gmp_real (&e->value.complex.i);
3020 mio_integer (&e->value.logical);
3024 mio_integer (&e->value.character.length);
3025 e->value.character.string
3026 = CONST_CAST (gfc_char_t *,
3027 mio_allocated_wide_string (e->value.character.string,
3028 e->value.character.length));
3032 bad_module ("Bad type in constant expression");
3049 /* Read and write namelists. */
3052 mio_namelist (gfc_symbol *sym)
3054 gfc_namelist *n, *m;
3055 const char *check_name;
3059 if (iomode == IO_OUTPUT)
3061 for (n = sym->namelist; n; n = n->next)
3062 mio_symbol_ref (&n->sym);
3066 /* This departure from the standard is flagged as an error.
3067 It does, in fact, work correctly. TODO: Allow it
3069 if (sym->attr.flavor == FL_NAMELIST)
3071 check_name = find_use_name (sym->name, false);
3072 if (check_name && strcmp (check_name, sym->name) != 0)
3073 gfc_error ("Namelist %s cannot be renamed by USE "
3074 "association to %s", sym->name, check_name);
3078 while (peek_atom () != ATOM_RPAREN)
3080 n = gfc_get_namelist ();
3081 mio_symbol_ref (&n->sym);
3083 if (sym->namelist == NULL)
3090 sym->namelist_tail = m;
3097 /* Save/restore lists of gfc_interface structures. When loading an
3098 interface, we are really appending to the existing list of
3099 interfaces. Checking for duplicate and ambiguous interfaces has to
3100 be done later when all symbols have been loaded. */
3103 mio_interface_rest (gfc_interface **ip)
3105 gfc_interface *tail, *p;
3106 pointer_info *pi = NULL;
3108 if (iomode == IO_OUTPUT)
3111 for (p = *ip; p; p = p->next)
3112 mio_symbol_ref (&p->sym);
3127 if (peek_atom () == ATOM_RPAREN)
3130 p = gfc_get_interface ();
3131 p->where = gfc_current_locus;
3132 pi = mio_symbol_ref (&p->sym);
3148 /* Save/restore a nameless operator interface. */
3151 mio_interface (gfc_interface **ip)
3154 mio_interface_rest (ip);
3158 /* Save/restore a named operator interface. */
3161 mio_symbol_interface (const char **name, const char **module,
3165 mio_pool_string (name);
3166 mio_pool_string (module);
3167 mio_interface_rest (ip);
3172 mio_namespace_ref (gfc_namespace **nsp)
3177 p = mio_pointer_ref (nsp);
3179 if (p->type == P_UNKNOWN)
3180 p->type = P_NAMESPACE;
3182 if (iomode == IO_INPUT && p->integer != 0)
3184 ns = (gfc_namespace *) p->u.pointer;
3187 ns = gfc_get_namespace (NULL, 0);
3188 associate_integer_pointer (p, ns);
3196 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3198 static gfc_namespace* current_f2k_derived;
3201 mio_typebound_proc (gfc_typebound_proc** proc)
3205 if (iomode == IO_INPUT)
3207 *proc = gfc_get_typebound_proc ();
3208 (*proc)->where = gfc_current_locus;
3214 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3216 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3217 (*proc)->non_overridable = mio_name ((*proc)->non_overridable,
3218 binding_overriding);
3219 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3221 if (iomode == IO_INPUT)
3222 (*proc)->pass_arg = NULL;
3224 flag = (int) (*proc)->pass_arg_num;
3225 mio_integer (&flag);
3226 (*proc)->pass_arg_num = (unsigned) flag;
3228 if ((*proc)->is_generic)
3234 if (iomode == IO_OUTPUT)
3235 for (g = (*proc)->u.generic; g; g = g->next)
3236 mio_allocated_string (g->specific_st->name);
3239 (*proc)->u.generic = NULL;
3240 while (peek_atom () != ATOM_RPAREN)
3242 g = gfc_get_tbp_generic ();
3245 require_atom (ATOM_STRING);
3246 gfc_get_sym_tree (atom_string, current_f2k_derived,
3248 gfc_free (atom_string);
3250 g->next = (*proc)->u.generic;
3251 (*proc)->u.generic = g;
3258 mio_symtree_ref (&(*proc)->u.specific);
3264 mio_typebound_symtree (gfc_symtree* st)
3266 if (iomode == IO_OUTPUT && !st->typebound)
3269 if (iomode == IO_OUTPUT)
3272 mio_allocated_string (st->name);
3274 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3276 mio_typebound_proc (&st->typebound);
3281 mio_finalizer (gfc_finalizer **f)
3283 if (iomode == IO_OUTPUT)
3286 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3287 mio_symtree_ref (&(*f)->proc_tree);
3291 *f = gfc_get_finalizer ();
3292 (*f)->where = gfc_current_locus; /* Value should not matter. */
3295 mio_symtree_ref (&(*f)->proc_tree);
3296 (*f)->proc_sym = NULL;
3301 mio_f2k_derived (gfc_namespace *f2k)
3303 current_f2k_derived = f2k;
3305 /* Handle the list of finalizer procedures. */
3307 if (iomode == IO_OUTPUT)
3310 for (f = f2k->finalizers; f; f = f->next)
3315 f2k->finalizers = NULL;
3316 while (peek_atom () != ATOM_RPAREN)
3319 mio_finalizer (&cur);
3320 cur->next = f2k->finalizers;
3321 f2k->finalizers = cur;
3326 /* Handle type-bound procedures. */
3328 if (iomode == IO_OUTPUT)
3329 gfc_traverse_symtree (f2k->sym_root, &mio_typebound_symtree);
3332 while (peek_atom () == ATOM_LPAREN)
3338 require_atom (ATOM_STRING);
3339 gfc_get_sym_tree (atom_string, f2k, &st);
3340 gfc_free (atom_string);
3342 mio_typebound_symtree (st);
3349 mio_full_f2k_derived (gfc_symbol *sym)
3353 if (iomode == IO_OUTPUT)
3355 if (sym->f2k_derived)
3356 mio_f2k_derived (sym->f2k_derived);
3360 if (peek_atom () != ATOM_RPAREN)
3362 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3363 mio_f2k_derived (sym->f2k_derived);
3366 gcc_assert (!sym->f2k_derived);
3373 /* Unlike most other routines, the address of the symbol node is already
3374 fixed on input and the name/module has already been filled in. */
3377 mio_symbol (gfc_symbol *sym)
3379 int intmod = INTMOD_NONE;
3381 gfc_formal_arglist *formal;
3385 mio_symbol_attribute (&sym->attr);
3386 mio_typespec (&sym->ts);
3388 /* Contained procedures don't have formal namespaces. Instead we output the
3389 procedure namespace. The will contain the formal arguments. */
3390 if (iomode == IO_OUTPUT)
3392 formal = sym->formal;
3393 while (formal && !formal->sym)
3394 formal = formal->next;
3397 mio_namespace_ref (&formal->sym->ns);
3399 mio_namespace_ref (&sym->formal_ns);
3403 mio_namespace_ref (&sym->formal_ns);
3406 sym->formal_ns->proc_name = sym;
3411 /* Save/restore common block links. */
3412 mio_symbol_ref (&sym->common_next);
3414 mio_formal_arglist (sym);
3416 if (sym->attr.flavor == FL_PARAMETER)
3417 mio_expr (&sym->value);
3419 mio_array_spec (&sym->as);
3421 mio_symbol_ref (&sym->result);
3423 if (sym->attr.cray_pointee)
3424 mio_symbol_ref (&sym->cp_pointer);
3426 /* Note that components are always saved, even if they are supposed
3427 to be private. Component access is checked during searching. */
3429 mio_component_list (&sym->components);
3431 if (sym->components != NULL)
3432 sym->component_access
3433 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3435 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3436 mio_full_f2k_derived (sym);
3440 /* Add the fields that say whether this is from an intrinsic module,
3441 and if so, what symbol it is within the module. */
3442 /* mio_integer (&(sym->from_intmod)); */
3443 if (iomode == IO_OUTPUT)
3445 intmod = sym->from_intmod;
3446 mio_integer (&intmod);
3450 mio_integer (&intmod);
3451 sym->from_intmod = intmod;
3454 mio_integer (&(sym->intmod_sym_id));
3460 /************************* Top level subroutines *************************/
3462 /* Given a root symtree node and a symbol, try to find a symtree that
3463 references the symbol that is not a unique name. */
3465 static gfc_symtree *
3466 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3468 gfc_symtree *s = NULL;
3473 s = find_symtree_for_symbol (st->right, sym);
3476 s = find_symtree_for_symbol (st->left, sym);
3480 if (st->n.sym == sym && !check_unique_name (st->name))
3487 /* A recursive function to look for a specific symbol by name and by
3488 module. Whilst several symtrees might point to one symbol, its
3489 is sufficient for the purposes here than one exist. Note that
3490 generic interfaces are distinguished as are symbols that have been
3491 renamed in another module. */
3492 static gfc_symtree *
3493 find_symbol (gfc_symtree *st, const char *name,
3494 const char *module, int generic)
3497 gfc_symtree *retval, *s;
3499 if (st == NULL || st->n.sym == NULL)
3502 c = strcmp (name, st->n.sym->name);
3503 if (c == 0 && st->n.sym->module
3504 && strcmp (module, st->n.sym->module) == 0
3505 && !check_unique_name (st->name))
3507 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3509 /* Detect symbols that are renamed by use association in another
3510 module by the absence of a symtree and null attr.use_rename,
3511 since the latter is not transmitted in the module file. */
3512 if (((!generic && !st->n.sym->attr.generic)
3513 || (generic && st->n.sym->attr.generic))
3514 && !(s == NULL && !st->n.sym->attr.use_rename))
3518 retval = find_symbol (st->left, name, module, generic);
3521 retval = find_symbol (st->right, name, module, generic);
3527 /* Skip a list between balanced left and right parens. */
3537 switch (parse_atom ())
3548 gfc_free (atom_string);
3560 /* Load operator interfaces from the module. Interfaces are unusual
3561 in that they attach themselves to existing symbols. */
3564 load_operator_interfaces (void)
3567 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3569 pointer_info *pi = NULL;
3574 while (peek_atom () != ATOM_RPAREN)
3578 mio_internal_string (name);
3579 mio_internal_string (module);
3581 n = number_use_names (name, true);
3584 for (i = 1; i <= n; i++)
3586 /* Decide if we need to load this one or not. */
3587 p = find_use_name_n (name, &i, true);
3591 while (parse_atom () != ATOM_RPAREN);
3597 uop = gfc_get_uop (p);
3598 pi = mio_interface_rest (&uop->op);
3602 if (gfc_find_uop (p, NULL))
3604 uop = gfc_get_uop (p);
3605 uop->op = gfc_get_interface ();
3606 uop->op->where = gfc_current_locus;
3607 add_fixup (pi->integer, &uop->op->sym);
3616 /* Load interfaces from the module. Interfaces are unusual in that
3617 they attach themselves to existing symbols. */
3620 load_generic_interfaces (void)
3623 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3625 gfc_interface *generic = NULL;
3630 while (peek_atom () != ATOM_RPAREN)
3634 mio_internal_string (name);
3635 mio_internal_string (module);
3637 n = number_use_names (name, false);
3638 renamed = n ? 1 : 0;
3641 for (i = 1; i <= n; i++)
3644 /* Decide if we need to load this one or not. */
3645 p = find_use_name_n (name, &i, false);
3647 st = find_symbol (gfc_current_ns->sym_root,
3648 name, module_name, 1);
3650 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3652 /* Skip the specific names for these cases. */
3653 while (i == 1 && parse_atom () != ATOM_RPAREN);
3658 /* If the symbol exists already and is being USEd without being
3659 in an ONLY clause, do not load a new symtree(11.3.2). */
3660 if (!only_flag && st)
3665 /* Make the symbol inaccessible if it has been added by a USE
3666 statement without an ONLY(11.3.2). */
3668 && !st->n.sym->attr.use_only
3669 && !st->n.sym->attr.use_rename
3670 && strcmp (st->n.sym->module, module_name) == 0)
3673 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3674 st = gfc_get_unique_symtree (gfc_current_ns);
3681 if (strcmp (st->name, p) != 0)
3683 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3689 /* Since we haven't found a valid generic interface, we had
3693 gfc_get_symbol (p, NULL, &sym);
3694 sym->name = gfc_get_string (name);
3695 sym->module = gfc_get_string (module_name);
3696 sym->attr.flavor = FL_PROCEDURE;
3697 sym->attr.generic = 1;
3698 sym->attr.use_assoc = 1;
3703 /* Unless sym is a generic interface, this reference
3706 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3710 if (st && !sym->attr.generic
3712 && strcmp(module, sym->module))
3716 sym->attr.use_only = only_flag;
3717 sym->attr.use_rename = renamed;
3721 mio_interface_rest (&sym->generic);
3722 generic = sym->generic;
3724 else if (!sym->generic)
3726 sym->generic = generic;
3727 sym->attr.generic_copy = 1;
3736 /* Load common blocks. */
3741 char name[GFC_MAX_SYMBOL_LEN + 1];
3746 while (peek_atom () != ATOM_RPAREN)
3750 mio_internal_string (name);
3752 p = gfc_get_common (name, 1);
3754 mio_symbol_ref (&p->head);
3755 mio_integer (&flags);
3759 p->threadprivate = 1;
3762 /* Get whether this was a bind(c) common or not. */
3763 mio_integer (&p->is_bind_c);
3764 /* Get the binding label. */
3765 mio_internal_string (p->binding_label);
3774 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3775 so that unused variables are not loaded and so that the expression can
3781 gfc_equiv *head, *tail, *end, *eq;
3785 in_load_equiv = true;
3787 end = gfc_current_ns->equiv;
3788 while (end != NULL && end->next != NULL)
3791 while (peek_atom () != ATOM_RPAREN) {
3795 while(peek_atom () != ATOM_RPAREN)
3798 head = tail = gfc_get_equiv ();
3801 tail->eq = gfc_get_equiv ();
3805 mio_pool_string (&tail->module);
3806 mio_expr (&tail->expr);
3809 /* Unused equivalence members have a unique name. In addition, it
3810 must be checked that the symbol is that from the module. */
3812 for (eq = head; eq; eq = eq->eq)
3814 if (eq->expr->symtree->n.sym->module
3815 && strcmp (module_name, eq->expr->symtree->n.sym->module) == 0
3816 && !check_unique_name (eq->expr->symtree->name))
3825 for (eq = head; eq; eq = head)
3828 gfc_free_expr (eq->expr);
3834 gfc_current_ns->equiv = head;
3845 in_load_equiv = false;
3849 /* Recursive function to traverse the pointer_info tree and load a
3850 needed symbol. We return nonzero if we load a symbol and stop the
3851 traversal, because the act of loading can alter the tree. */
3854 load_needed (pointer_info *p)
3865 rv |= load_needed (p->left);
3866 rv |= load_needed (p->right);
3868 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
3871 p->u.rsym.state = USED;
3873 set_module_locus (&p->u.rsym.where);
3875 sym = p->u.rsym.sym;
3878 q = get_integer (p->u.rsym.ns);
3880 ns = (gfc_namespace *) q->u.pointer;
3883 /* Create an interface namespace if necessary. These are
3884 the namespaces that hold the formal parameters of module
3887 ns = gfc_get_namespace (NULL, 0);
3888 associate_integer_pointer (q, ns);
3891 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
3892 doesn't go pear-shaped if the symbol is used. */
3894 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
3897 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
3898 sym->module = gfc_get_string (p->u.rsym.module);
3899 strcpy (sym->binding_label, p->u.rsym.binding_label);
3901 associate_integer_pointer (p, sym);
3905 sym->attr.use_assoc = 1;
3907 sym->attr.use_only = 1;
3908 if (p->u.rsym.renamed)
3909 sym->attr.use_rename = 1;
3915 /* Recursive function for cleaning up things after a module has been read. */
3918 read_cleanup (pointer_info *p)
3926 read_cleanup (p->left);
3927 read_cleanup (p->right);
3929 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
3931 /* Add hidden symbols to the symtree. */
3932 q = get_integer (p->u.rsym.ns);
3933 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
3935 st->n.sym = p->u.rsym.sym;
3938 /* Fixup any symtree references. */
3939 p->u.rsym.symtree = st;
3940 resolve_fixups (p->u.rsym.stfixup, st);
3941 p->u.rsym.stfixup = NULL;
3944 /* Free unused symbols. */
3945 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
3946 gfc_free_symbol (p->u.rsym.sym);
3950 /* It is not quite enough to check for ambiguity in the symbols by
3951 the loaded symbol and the new symbol not being identical. */
3953 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
3957 symbol_attribute attr;
3959 rsym = info->u.rsym.sym;
3963 /* If the existing symbol is generic from a different module and
3964 the new symbol is generic there can be no ambiguity. */
3965 if (st_sym->attr.generic
3967 && strcmp (st_sym->module, module_name))
3969 /* The new symbol's attributes have not yet been read. Since
3970 we need attr.generic, read it directly. */
3971 get_module_locus (&locus);
3972 set_module_locus (&info->u.rsym.where);
3975 mio_symbol_attribute (&attr);
3976 set_module_locus (&locus);
3985 /* Read a module file. */
3990 module_locus operator_interfaces, user_operators;
3992 char name[GFC_MAX_SYMBOL_LEN + 1];
3994 int ambiguous, j, nuse, symbol;
3995 pointer_info *info, *q;
4000 get_module_locus (&operator_interfaces); /* Skip these for now. */
4003 get_module_locus (&user_operators);
4007 /* Skip commons and equivalences for now. */
4013 /* Create the fixup nodes for all the symbols. */
4015 while (peek_atom () != ATOM_RPAREN)
4017 require_atom (ATOM_INTEGER);
4018 info = get_integer (atom_int);
4020 info->type = P_SYMBOL;
4021 info->u.rsym.state = UNUSED;
4023 mio_internal_string (info->u.rsym.true_name);
4024 mio_internal_string (info->u.rsym.module);
4025 mio_internal_string (info->u.rsym.binding_label);
4028 require_atom (ATOM_INTEGER);
4029 info->u.rsym.ns = atom_int;
4031 get_module_locus (&info->u.rsym.where);
4034 /* See if the symbol has already been loaded by a previous module.
4035 If so, we reference the existing symbol and prevent it from
4036 being loaded again. This should not happen if the symbol being
4037 read is an index for an assumed shape dummy array (ns != 1). */
4039 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4042 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4045 info->u.rsym.state = USED;
4046 info->u.rsym.sym = sym;
4048 /* Some symbols do not have a namespace (eg. formal arguments),
4049 so the automatic "unique symtree" mechanism must be suppressed
4050 by marking them as referenced. */
4051 q = get_integer (info->u.rsym.ns);
4052 if (q->u.pointer == NULL)
4054 info->u.rsym.referenced = 1;
4058 /* If possible recycle the symtree that references the symbol.
4059 If a symtree is not found and the module does not import one,
4060 a unique-name symtree is found by read_cleanup. */
4061 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4064 info->u.rsym.symtree = st;
4065 info->u.rsym.referenced = 1;
4071 /* Parse the symtree lists. This lets us mark which symbols need to
4072 be loaded. Renaming is also done at this point by replacing the
4077 while (peek_atom () != ATOM_RPAREN)
4079 mio_internal_string (name);
4080 mio_integer (&ambiguous);
4081 mio_integer (&symbol);
4083 info = get_integer (symbol);
4085 /* See how many use names there are. If none, go through the start
4086 of the loop at least once. */
4087 nuse = number_use_names (name, false);
4088 info->u.rsym.renamed = nuse ? 1 : 0;
4093 for (j = 1; j <= nuse; j++)
4095 /* Get the jth local name for this symbol. */
4096 p = find_use_name_n (name, &j, false);
4098 if (p == NULL && strcmp (name, module_name) == 0)
4101 /* Skip symtree nodes not in an ONLY clause, unless there
4102 is an existing symtree loaded from another USE statement. */
4105 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4107 info->u.rsym.symtree = st;
4111 /* If a symbol of the same name and module exists already,
4112 this symbol, which is not in an ONLY clause, must not be
4113 added to the namespace(11.3.2). Note that find_symbol
4114 only returns the first occurrence that it finds. */
4115 if (!only_flag && !info->u.rsym.renamed
4116 && strcmp (name, module_name) != 0
4117 && find_symbol (gfc_current_ns->sym_root, name,
4121 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4125 /* Check for ambiguous symbols. */
4126 if (check_for_ambiguous (st->n.sym, info))
4128 info->u.rsym.symtree = st;
4132 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4134 /* Delete the symtree if the symbol has been added by a USE
4135 statement without an ONLY(11.3.2). Remember that the rsym
4136 will be the same as the symbol found in the symtree, for
4138 if (st && (only_flag || info->u.rsym.renamed)
4139 && !st->n.sym->attr.use_only
4140 && !st->n.sym->attr.use_rename
4141 && info->u.rsym.sym == st->n.sym)
4142 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4144 /* Create a symtree node in the current namespace for this
4146 st = check_unique_name (p)
4147 ? gfc_get_unique_symtree (gfc_current_ns)
4148 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4149 st->ambiguous = ambiguous;
4151 sym = info->u.rsym.sym;
4153 /* Create a symbol node if it doesn't already exist. */
4156 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4158 sym = info->u.rsym.sym;
4159 sym->module = gfc_get_string (info->u.rsym.module);
4161 /* TODO: hmm, can we test this? Do we know it will be
4162 initialized to zeros? */
4163 if (info->u.rsym.binding_label[0] != '\0')
4164 strcpy (sym->binding_label, info->u.rsym.binding_label);
4170 if (strcmp (name, p) != 0)
4171 sym->attr.use_rename = 1;
4173 /* We need to set the only_flag here so that symbols from the
4174 same USE...ONLY but earlier are not deleted from the tree in
4175 the gfc_delete_symtree above. */
4176 sym->attr.use_only = only_flag;
4178 /* Store the symtree pointing to this symbol. */
4179 info->u.rsym.symtree = st;
4181 if (info->u.rsym.state == UNUSED)
4182 info->u.rsym.state = NEEDED;
4183 info->u.rsym.referenced = 1;
4190 /* Load intrinsic operator interfaces. */
4191 set_module_locus (&operator_interfaces);
4194 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4196 if (i == INTRINSIC_USER)
4201 u = find_use_operator (i);
4212 mio_interface (&gfc_current_ns->op[i]);
4217 /* Load generic and user operator interfaces. These must follow the
4218 loading of symtree because otherwise symbols can be marked as
4221 set_module_locus (&user_operators);
4223 load_operator_interfaces ();
4224 load_generic_interfaces ();
4229 /* At this point, we read those symbols that are needed but haven't
4230 been loaded yet. If one symbol requires another, the other gets
4231 marked as NEEDED if its previous state was UNUSED. */
4233 while (load_needed (pi_root));
4235 /* Make sure all elements of the rename-list were found in the module. */
4237 for (u = gfc_rename_list; u; u = u->next)
4242 if (u->op == INTRINSIC_NONE)
4244 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4245 u->use_name, &u->where, module_name);
4249 if (u->op == INTRINSIC_USER)
4251 gfc_error ("User operator '%s' referenced at %L not found "
4252 "in module '%s'", u->use_name, &u->where, module_name);
4256 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4257 "in module '%s'", gfc_op2string (u->op), &u->where,
4261 gfc_check_interfaces (gfc_current_ns);
4263 /* Clean up symbol nodes that were never loaded, create references
4264 to hidden symbols. */
4266 read_cleanup (pi_root);
4270 /* Given an access type that is specific to an entity and the default
4271 access, return nonzero if the entity is publicly accessible. If the
4272 element is declared as PUBLIC, then it is public; if declared
4273 PRIVATE, then private, and otherwise it is public unless the default
4274 access in this context has been declared PRIVATE. */
4277 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4279 if (specific_access == ACCESS_PUBLIC)
4281 if (specific_access == ACCESS_PRIVATE)
4284 if (gfc_option.flag_module_private)
4285 return default_access == ACCESS_PUBLIC;
4287 return default_access != ACCESS_PRIVATE;
4291 /* A structure to remember which commons we've already written. */
4293 struct written_common
4295 BBT_HEADER(written_common);
4296 const char *name, *label;
4299 static struct written_common *written_commons = NULL;
4301 /* Comparison function used for balancing the binary tree. */
4304 compare_written_commons (void *a1, void *b1)
4306 const char *aname = ((struct written_common *) a1)->name;
4307 const char *alabel = ((struct written_common *) a1)->label;
4308 const char *bname = ((struct written_common *) b1)->name;
4309 const char *blabel = ((struct written_common *) b1)->label;
4310 int c = strcmp (aname, bname);
4312 return (c != 0 ? c : strcmp (alabel, blabel));
4315 /* Free a list of written commons. */
4318 free_written_common (struct written_common *w)
4324 free_written_common (w->left);
4326 free_written_common (w->right);
4331 /* Write a common block to the module -- recursive helper function. */
4334 write_common_0 (gfc_symtree *st)
4340 struct written_common *w;
4341 bool write_me = true;
4346 write_common_0 (st->left);
4348 /* We will write out the binding label, or the name if no label given. */
4349 name = st->n.common->name;
4351 label = p->is_bind_c ? p->binding_label : p->name;
4353 /* Check if we've already output this common. */
4354 w = written_commons;
4357 int c = strcmp (name, w->name);
4358 c = (c != 0 ? c : strcmp (label, w->label));
4362 w = (c < 0) ? w->left : w->right;
4367 /* Write the common to the module. */
4369 mio_pool_string (&name);
4371 mio_symbol_ref (&p->head);
4372 flags = p->saved ? 1 : 0;
4373 if (p->threadprivate)
4375 mio_integer (&flags);
4377 /* Write out whether the common block is bind(c) or not. */
4378 mio_integer (&(p->is_bind_c));
4380 mio_pool_string (&label);
4383 /* Record that we have written this common. */
4384 w = XCNEW (struct written_common);
4387 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4390 write_common_0 (st->right);
4394 /* Write a common, by initializing the list of written commons, calling
4395 the recursive function write_common_0() and cleaning up afterwards. */
4398 write_common (gfc_symtree *st)
4400 written_commons = NULL;
4401 write_common_0 (st);
4402 free_written_common (written_commons);
4403 written_commons = NULL;
4407 /* Write the blank common block to the module. */
4410 write_blank_common (void)
4412 const char * name = BLANK_COMMON_NAME;
4414 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4415 this, but it hasn't been checked. Just making it so for now. */
4418 if (gfc_current_ns->blank_common.head == NULL)
4423 mio_pool_string (&name);
4425 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4426 saved = gfc_current_ns->blank_common.saved;
4427 mio_integer (&saved);
4429 /* Write out whether the common block is bind(c) or not. */
4430 mio_integer (&is_bind_c);
4432 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4433 it doesn't matter because the label isn't used. */
4434 mio_pool_string (&name);
4440 /* Write equivalences to the module. */
4449 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4453 for (e = eq; e; e = e->eq)
4455 if (e->module == NULL)
4456 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4457 mio_allocated_string (e->module);
4458 mio_expr (&e->expr);
4467 /* Write a symbol to the module. */
4470 write_symbol (int n, gfc_symbol *sym)
4474 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4475 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4478 mio_pool_string (&sym->name);
4480 mio_pool_string (&sym->module);
4481 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4483 label = sym->binding_label;
4484 mio_pool_string (&label);
4487 mio_pool_string (&sym->name);
4489 mio_pointer_ref (&sym->ns);
4496 /* Recursive traversal function to write the initial set of symbols to
4497 the module. We check to see if the symbol should be written
4498 according to the access specification. */
4501 write_symbol0 (gfc_symtree *st)
4505 bool dont_write = false;
4510 write_symbol0 (st->left);
4513 if (sym->module == NULL)
4514 sym->module = gfc_get_string (module_name);
4516 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4517 && !sym->attr.subroutine && !sym->attr.function)
4520 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4525 p = get_pointer (sym);
4526 if (p->type == P_UNKNOWN)
4529 if (p->u.wsym.state != WRITTEN)
4531 write_symbol (p->integer, sym);
4532 p->u.wsym.state = WRITTEN;
4536 write_symbol0 (st->right);
4540 /* Recursive traversal function to write the secondary set of symbols
4541 to the module file. These are symbols that were not public yet are
4542 needed by the public symbols or another dependent symbol. The act
4543 of writing a symbol can modify the pointer_info tree, so we cease
4544 traversal if we find a symbol to write. We return nonzero if a
4545 symbol was written and pass that information upwards. */
4548 write_symbol1 (pointer_info *p)
4555 result = write_symbol1 (p->left);
4557 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4559 p->u.wsym.state = WRITTEN;
4560 write_symbol (p->integer, p->u.wsym.sym);
4564 result |= write_symbol1 (p->right);
4569 /* Write operator interfaces associated with a symbol. */
4572 write_operator (gfc_user_op *uop)
4574 static char nullstring[] = "";
4575 const char *p = nullstring;
4578 || !gfc_check_access (uop->access, uop->ns->default_access))
4581 mio_symbol_interface (&uop->name, &p, &uop->op);
4585 /* Write generic interfaces from the namespace sym_root. */
4588 write_generic (gfc_symtree *st)
4595 write_generic (st->left);
4596 write_generic (st->right);
4599 if (!sym || check_unique_name (st->name))
4602 if (sym->generic == NULL
4603 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4606 if (sym->module == NULL)
4607 sym->module = gfc_get_string (module_name);
4609 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4614 write_symtree (gfc_symtree *st)
4621 /* A symbol in an interface body must not be visible in the
4623 if (sym->ns != gfc_current_ns
4624 && sym->ns->proc_name
4625 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4628 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4629 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4630 && !sym->attr.subroutine && !sym->attr.function))
4633 if (check_unique_name (st->name))
4636 p = find_pointer (sym);
4638 gfc_internal_error ("write_symtree(): Symbol not written");
4640 mio_pool_string (&st->name);
4641 mio_integer (&st->ambiguous);
4642 mio_integer (&p->integer);
4651 /* Write the operator interfaces. */
4654 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4656 if (i == INTRINSIC_USER)
4659 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4660 gfc_current_ns->default_access)
4661 ? &gfc_current_ns->op[i] : NULL);
4669 gfc_traverse_user_op (gfc_current_ns, write_operator);
4675 write_generic (gfc_current_ns->sym_root);
4681 write_blank_common ();
4682 write_common (gfc_current_ns->common_root);
4693 /* Write symbol information. First we traverse all symbols in the
4694 primary namespace, writing those that need to be written.
4695 Sometimes writing one symbol will cause another to need to be
4696 written. A list of these symbols ends up on the write stack, and
4697 we end by popping the bottom of the stack and writing the symbol
4698 until the stack is empty. */
4702 write_symbol0 (gfc_current_ns->sym_root);
4703 while (write_symbol1 (pi_root))
4712 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
4717 /* Read a MD5 sum from the header of a module file. If the file cannot
4718 be opened, or we have any other error, we return -1. */
4721 read_md5_from_module_file (const char * filename, unsigned char md5[16])
4727 /* Open the file. */
4728 if ((file = fopen (filename, "r")) == NULL)
4731 /* Read two lines. */
4732 if (fgets (buf, sizeof (buf) - 1, file) == NULL
4733 || fgets (buf, sizeof (buf) - 1, file) == NULL)
4739 /* Close the file. */
4742 /* If the header is not what we expect, or is too short, bail out. */
4743 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
4746 /* Now, we have a real MD5, read it into the array. */
4747 for (n = 0; n < 16; n++)
4751 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
4761 /* Given module, dump it to disk. If there was an error while
4762 processing the module, dump_flag will be set to zero and we delete
4763 the module file, even if it was already there. */
4766 gfc_dump_module (const char *name, int dump_flag)
4769 char *filename, *filename_tmp, *p;
4772 unsigned char md5_new[16], md5_old[16];
4774 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
4775 if (gfc_option.module_dir != NULL)
4777 n += strlen (gfc_option.module_dir);
4778 filename = (char *) alloca (n);
4779 strcpy (filename, gfc_option.module_dir);
4780 strcat (filename, name);
4784 filename = (char *) alloca (n);
4785 strcpy (filename, name);
4787 strcat (filename, MODULE_EXTENSION);
4789 /* Name of the temporary file used to write the module. */
4790 filename_tmp = (char *) alloca (n + 1);
4791 strcpy (filename_tmp, filename);
4792 strcat (filename_tmp, "0");
4794 /* There was an error while processing the module. We delete the
4795 module file, even if it was already there. */
4802 /* Write the module to the temporary file. */
4803 module_fp = fopen (filename_tmp, "w");
4804 if (module_fp == NULL)
4805 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
4806 filename_tmp, strerror (errno));
4808 /* Write the header, including space reserved for the MD5 sum. */
4812 *strchr (p, '\n') = '\0';
4814 fprintf (module_fp, "GFORTRAN module created from %s on %s\nMD5:",
4815 gfc_source_file, p);
4816 fgetpos (module_fp, &md5_pos);
4817 fputs ("00000000000000000000000000000000 -- "
4818 "If you edit this, you'll get what you deserve.\n\n", module_fp);
4820 /* Initialize the MD5 context that will be used for output. */
4821 md5_init_ctx (&ctx);
4823 /* Write the module itself. */
4825 strcpy (module_name, name);
4831 free_pi_tree (pi_root);
4836 /* Write the MD5 sum to the header of the module file. */
4837 md5_finish_ctx (&ctx, md5_new);
4838 fsetpos (module_fp, &md5_pos);
4839 for (n = 0; n < 16; n++)
4840 fprintf (module_fp, "%02x", md5_new[n]);
4842 if (fclose (module_fp))
4843 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
4844 filename_tmp, strerror (errno));
4846 /* Read the MD5 from the header of the old module file and compare. */
4847 if (read_md5_from_module_file (filename, md5_old) != 0
4848 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
4850 /* Module file have changed, replace the old one. */
4852 rename (filename_tmp, filename);
4855 unlink (filename_tmp);
4860 sort_iso_c_rename_list (void)
4862 gfc_use_rename *tmp_list = NULL;
4863 gfc_use_rename *curr;
4864 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
4868 for (curr = gfc_rename_list; curr; curr = curr->next)
4870 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
4871 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
4873 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4874 "intrinsic module ISO_C_BINDING.", curr->use_name,
4878 /* Put it in the list. */
4879 kinds_used[c_kind] = curr;
4882 /* Make a new (sorted) rename list. */
4884 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
4887 if (i < ISOCBINDING_NUMBER)
4889 tmp_list = kinds_used[i];
4893 for (; i < ISOCBINDING_NUMBER; i++)
4894 if (kinds_used[i] != NULL)
4896 curr->next = kinds_used[i];
4902 gfc_rename_list = tmp_list;
4906 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
4907 the current namespace for all named constants, pointer types, and
4908 procedures in the module unless the only clause was used or a rename
4909 list was provided. */
4912 import_iso_c_binding_module (void)
4914 gfc_symbol *mod_sym = NULL;
4915 gfc_symtree *mod_symtree = NULL;
4916 const char *iso_c_module_name = "__iso_c_binding";
4921 /* Look only in the current namespace. */
4922 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
4924 if (mod_symtree == NULL)
4926 /* symtree doesn't already exist in current namespace. */
4927 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree);
4929 if (mod_symtree != NULL)
4930 mod_sym = mod_symtree->n.sym;
4932 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
4933 "create symbol for %s", iso_c_module_name);
4935 mod_sym->attr.flavor = FL_MODULE;
4936 mod_sym->attr.intrinsic = 1;
4937 mod_sym->module = gfc_get_string (iso_c_module_name);
4938 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
4941 /* Generate the symbols for the named constants representing
4942 the kinds for intrinsic data types. */
4945 /* Sort the rename list because there are dependencies between types
4946 and procedures (e.g., c_loc needs c_ptr). */
4947 sort_iso_c_rename_list ();
4949 for (u = gfc_rename_list; u; u = u->next)
4951 i = get_c_kind (u->use_name, c_interop_kinds_table);
4953 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
4955 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4956 "intrinsic module ISO_C_BINDING.", u->use_name,
4961 generate_isocbinding_symbol (iso_c_module_name, i, u->local_name);
4966 for (i = 0; i < ISOCBINDING_NUMBER; i++)
4969 for (u = gfc_rename_list; u; u = u->next)
4971 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
4973 local_name = u->local_name;
4978 generate_isocbinding_symbol (iso_c_module_name, i, local_name);
4981 for (u = gfc_rename_list; u; u = u->next)
4986 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
4987 "module ISO_C_BINDING", u->use_name, &u->where);
4993 /* Add an integer named constant from a given module. */
4996 create_int_parameter (const char *name, int value, const char *modname,
4997 intmod_id module, int id)
4999 gfc_symtree *tmp_symtree;
5002 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5003 if (tmp_symtree != NULL)
5005 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5008 gfc_error ("Symbol '%s' already declared", name);
5011 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree);
5012 sym = tmp_symtree->n.sym;
5014 sym->module = gfc_get_string (modname);
5015 sym->attr.flavor = FL_PARAMETER;
5016 sym->ts.type = BT_INTEGER;
5017 sym->ts.kind = gfc_default_integer_kind;
5018 sym->value = gfc_int_expr (value);
5019 sym->attr.use_assoc = 1;
5020 sym->from_intmod = module;
5021 sym->intmod_sym_id = id;
5025 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5028 use_iso_fortran_env_module (void)
5030 static char mod[] = "iso_fortran_env";
5031 const char *local_name;
5033 gfc_symbol *mod_sym;
5034 gfc_symtree *mod_symtree;
5037 intmod_sym symbol[] = {
5038 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5039 #include "iso-fortran-env.def"
5041 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5044 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5045 #include "iso-fortran-env.def"
5048 /* Generate the symbol for the module itself. */
5049 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5050 if (mod_symtree == NULL)
5052 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree);
5053 gcc_assert (mod_symtree);
5054 mod_sym = mod_symtree->n.sym;
5056 mod_sym->attr.flavor = FL_MODULE;
5057 mod_sym->attr.intrinsic = 1;
5058 mod_sym->module = gfc_get_string (mod);
5059 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5062 if (!mod_symtree->n.sym->attr.intrinsic)
5063 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5064 "non-intrinsic module name used previously", mod);
5066 /* Generate the symbols for the module integer named constants. */
5068 for (u = gfc_rename_list; u; u = u->next)
5070 for (i = 0; symbol[i].name; i++)
5071 if (strcmp (symbol[i].name, u->use_name) == 0)
5074 if (symbol[i].name == NULL)
5076 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5077 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
5082 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5083 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5084 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5085 "from intrinsic module ISO_FORTRAN_ENV at %L is "
5086 "incompatible with option %s", &u->where,
5087 gfc_option.flag_default_integer
5088 ? "-fdefault-integer-8" : "-fdefault-real-8");
5090 create_int_parameter (u->local_name[0] ? u->local_name
5092 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5097 for (i = 0; symbol[i].name; i++)
5100 for (u = gfc_rename_list; u; u = u->next)
5102 if (strcmp (symbol[i].name, u->use_name) == 0)
5104 local_name = u->local_name;
5110 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5111 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5112 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5113 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5114 "incompatible with option %s",
5115 gfc_option.flag_default_integer
5116 ? "-fdefault-integer-8" : "-fdefault-real-8");
5118 create_int_parameter (local_name ? local_name : symbol[i].name,
5119 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5123 for (u = gfc_rename_list; u; u = u->next)
5128 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5129 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5135 /* Process a USE directive. */
5138 gfc_use_module (void)
5143 gfc_symtree *mod_symtree;
5144 gfc_use_list *use_stmt;
5146 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5148 strcpy (filename, module_name);
5149 strcat (filename, MODULE_EXTENSION);
5151 /* First, try to find an non-intrinsic module, unless the USE statement
5152 specified that the module is intrinsic. */
5155 module_fp = gfc_open_included_file (filename, true, true);
5157 /* Then, see if it's an intrinsic one, unless the USE statement
5158 specified that the module is non-intrinsic. */
5159 if (module_fp == NULL && !specified_nonint)
5161 if (strcmp (module_name, "iso_fortran_env") == 0
5162 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5163 "intrinsic module at %C") != FAILURE)
5165 use_iso_fortran_env_module ();
5169 if (strcmp (module_name, "iso_c_binding") == 0
5170 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5171 "ISO_C_BINDING module at %C") != FAILURE)
5173 import_iso_c_binding_module();
5177 module_fp = gfc_open_intrinsic_module (filename);
5179 if (module_fp == NULL && specified_int)
5180 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5184 if (module_fp == NULL)
5185 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5186 filename, strerror (errno));
5188 /* Check that we haven't already USEd an intrinsic module with the
5191 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5192 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5193 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5194 "intrinsic module name used previously", module_name);
5201 /* Skip the first two lines of the module, after checking that this is
5202 a gfortran module file. */
5208 bad_module ("Unexpected end of module");
5211 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5212 || (start == 2 && strcmp (atom_name, " module") != 0))
5213 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5220 /* Make sure we're not reading the same module that we may be building. */
5221 for (p = gfc_state_stack; p; p = p->previous)
5222 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5223 gfc_fatal_error ("Can't USE the same module we're building!");
5226 init_true_name_tree ();
5230 free_true_name (true_name_root);
5231 true_name_root = NULL;
5233 free_pi_tree (pi_root);
5238 use_stmt = gfc_get_use_list ();
5239 use_stmt->module_name = gfc_get_string (module_name);
5240 use_stmt->only_flag = only_flag;
5241 use_stmt->rename = gfc_rename_list;
5242 use_stmt->where = use_locus;
5243 gfc_rename_list = NULL;
5244 use_stmt->next = gfc_current_ns->use_stmts;
5245 gfc_current_ns->use_stmts = use_stmt;
5250 gfc_free_use_stmts (gfc_use_list *use_stmts)
5253 for (; use_stmts; use_stmts = next)
5255 gfc_use_rename *next_rename;
5257 for (; use_stmts->rename; use_stmts->rename = next_rename)
5259 next_rename = use_stmts->rename->next;
5260 gfc_free (use_stmts->rename);
5262 next = use_stmts->next;
5263 gfc_free (use_stmts);
5269 gfc_module_init_2 (void)
5271 last_atom = ATOM_LPAREN;
5276 gfc_module_done_2 (void)