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,
5 Free Software Foundation, Inc.
6 Contributed by Andy Vaught
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
25 sequence of atoms, which can be left or right parenthesis, names,
26 integers or strings. Parenthesis are always matched which allows
27 us to skip over sections at high speed without having to know
28 anything about the internal structure of the lists. A "name" is
29 usually a fortran 95 identifier, but can also start with '@' in
30 order to reference a hidden symbol.
32 The first line of a module is an informational message about what
33 created the module, the file it came from and when it was created.
34 The second line is a warning for people not to edit the module.
35 The rest of the module looks like:
37 ( ( <Interface info for UPLUS> )
38 ( <Interface info for UMINUS> )
41 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
44 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
47 ( ( <common name> <symbol> <saved flag>)
53 ( <Symbol Number (in no particular order)>
55 <Module name of symbol>
56 ( <symbol information> )
65 In general, symbols refer to other symbols by their symbol number,
66 which are zero based. Symbols are written to the module in no
74 #include "parse.h" /* FIXME */
77 #define MODULE_EXTENSION ".mod"
79 /* Don't put any single quote (') in MOD_VERSION,
80 if yout want it to be recognized. */
81 #define MOD_VERSION "5"
84 /* Structure that describes a position within a module file. */
93 /* Structure for list of symbols of intrinsic modules. */
106 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
110 /* The fixup structure lists pointers to pointers that have to
111 be updated when a pointer value becomes known. */
113 typedef struct fixup_t
116 struct fixup_t *next;
121 /* Structure for holding extra info needed for pointers being read. */
137 typedef struct pointer_info
139 BBT_HEADER (pointer_info);
143 /* The first component of each member of the union is the pointer
150 void *pointer; /* Member for doing pointer searches. */
155 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
156 enum gfc_rsym_state state;
157 int ns, referenced, renamed;
160 gfc_symtree *symtree;
161 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
168 enum gfc_wsym_state state;
177 #define gfc_get_pointer_info() XCNEW (pointer_info)
180 /* Local variables */
182 /* The FILE for the module we're reading or writing. */
183 static FILE *module_fp;
185 /* MD5 context structure. */
186 static struct md5_ctx ctx;
188 /* The name of the module we're reading (USE'ing) or writing. */
189 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
191 /* The way the module we're reading was specified. */
192 static bool specified_nonint, specified_int;
194 static int module_line, module_column, only_flag;
196 { IO_INPUT, IO_OUTPUT }
199 static gfc_use_rename *gfc_rename_list;
200 static pointer_info *pi_root;
201 static int symbol_number; /* Counter for assigning symbol numbers */
203 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
204 static bool in_load_equiv;
206 static locus use_locus;
210 /*****************************************************************/
212 /* Pointer/integer conversion. Pointers between structures are stored
213 as integers in the module file. The next couple of subroutines
214 handle this translation for reading and writing. */
216 /* Recursively free the tree of pointer structures. */
219 free_pi_tree (pointer_info *p)
224 if (p->fixup != NULL)
225 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
227 free_pi_tree (p->left);
228 free_pi_tree (p->right);
234 /* Compare pointers when searching by pointer. Used when writing a
238 compare_pointers (void *_sn1, void *_sn2)
240 pointer_info *sn1, *sn2;
242 sn1 = (pointer_info *) _sn1;
243 sn2 = (pointer_info *) _sn2;
245 if (sn1->u.pointer < sn2->u.pointer)
247 if (sn1->u.pointer > sn2->u.pointer)
254 /* Compare integers when searching by integer. Used when reading a
258 compare_integers (void *_sn1, void *_sn2)
260 pointer_info *sn1, *sn2;
262 sn1 = (pointer_info *) _sn1;
263 sn2 = (pointer_info *) _sn2;
265 if (sn1->integer < sn2->integer)
267 if (sn1->integer > sn2->integer)
274 /* Initialize the pointer_info tree. */
283 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
285 /* Pointer 0 is the NULL pointer. */
286 p = gfc_get_pointer_info ();
291 gfc_insert_bbt (&pi_root, p, compare);
293 /* Pointer 1 is the current namespace. */
294 p = gfc_get_pointer_info ();
295 p->u.pointer = gfc_current_ns;
297 p->type = P_NAMESPACE;
299 gfc_insert_bbt (&pi_root, p, compare);
305 /* During module writing, call here with a pointer to something,
306 returning the pointer_info node. */
308 static pointer_info *
309 find_pointer (void *gp)
316 if (p->u.pointer == gp)
318 p = (gp < p->u.pointer) ? p->left : p->right;
325 /* Given a pointer while writing, returns the pointer_info tree node,
326 creating it if it doesn't exist. */
328 static pointer_info *
329 get_pointer (void *gp)
333 p = find_pointer (gp);
337 /* Pointer doesn't have an integer. Give it one. */
338 p = gfc_get_pointer_info ();
341 p->integer = symbol_number++;
343 gfc_insert_bbt (&pi_root, p, compare_pointers);
349 /* Given an integer during reading, find it in the pointer_info tree,
350 creating the node if not found. */
352 static pointer_info *
353 get_integer (int integer)
363 c = compare_integers (&t, p);
367 p = (c < 0) ? p->left : p->right;
373 p = gfc_get_pointer_info ();
374 p->integer = integer;
377 gfc_insert_bbt (&pi_root, p, compare_integers);
383 /* Recursive function to find a pointer within a tree by brute force. */
385 static pointer_info *
386 fp2 (pointer_info *p, const void *target)
393 if (p->u.pointer == target)
396 q = fp2 (p->left, target);
400 return fp2 (p->right, target);
404 /* During reading, find a pointer_info node from the pointer value.
405 This amounts to a brute-force search. */
407 static pointer_info *
408 find_pointer2 (void *p)
410 return fp2 (pi_root, p);
414 /* Resolve any fixups using a known pointer. */
417 resolve_fixups (fixup_t *f, void *gp)
430 /* Call here during module reading when we know what pointer to
431 associate with an integer. Any fixups that exist are resolved at
435 associate_integer_pointer (pointer_info *p, void *gp)
437 if (p->u.pointer != NULL)
438 gfc_internal_error ("associate_integer_pointer(): Already associated");
442 resolve_fixups (p->fixup, gp);
448 /* During module reading, given an integer and a pointer to a pointer,
449 either store the pointer from an already-known value or create a
450 fixup structure in order to store things later. Returns zero if
451 the reference has been actually stored, or nonzero if the reference
452 must be fixed later (i.e., associate_integer_pointer must be called
453 sometime later. Returns the pointer_info structure. */
455 static pointer_info *
456 add_fixup (int integer, void *gp)
462 p = get_integer (integer);
464 if (p->integer == 0 || p->u.pointer != NULL)
467 *cp = (char *) p->u.pointer;
476 f->pointer = (void **) gp;
483 /*****************************************************************/
485 /* Parser related subroutines */
487 /* Free the rename list left behind by a USE statement. */
492 gfc_use_rename *next;
494 for (; gfc_rename_list; gfc_rename_list = next)
496 next = gfc_rename_list->next;
497 gfc_free (gfc_rename_list);
502 /* Match a USE statement. */
507 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
508 gfc_use_rename *tail = NULL, *new_use;
509 interface_type type, type2;
513 specified_int = false;
514 specified_nonint = false;
516 if (gfc_match (" , ") == MATCH_YES)
518 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
520 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
521 "nature in USE statement at %C") == FAILURE)
524 if (strcmp (module_nature, "intrinsic") == 0)
525 specified_int = true;
528 if (strcmp (module_nature, "non_intrinsic") == 0)
529 specified_nonint = true;
532 gfc_error ("Module nature in USE statement at %C shall "
533 "be either INTRINSIC or NON_INTRINSIC");
540 /* Help output a better error message than "Unclassifiable
542 gfc_match (" %n", module_nature);
543 if (strcmp (module_nature, "intrinsic") == 0
544 || strcmp (module_nature, "non_intrinsic") == 0)
545 gfc_error ("\"::\" was expected after module nature at %C "
546 "but was not found");
552 m = gfc_match (" ::");
553 if (m == MATCH_YES &&
554 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
555 "\"USE :: module\" at %C") == FAILURE)
560 m = gfc_match ("% ");
566 use_locus = gfc_current_locus;
568 m = gfc_match_name (module_name);
575 if (gfc_match_eos () == MATCH_YES)
577 if (gfc_match_char (',') != MATCH_YES)
580 if (gfc_match (" only :") == MATCH_YES)
583 if (gfc_match_eos () == MATCH_YES)
588 /* Get a new rename struct and add it to the rename list. */
589 new_use = gfc_get_use_rename ();
590 new_use->where = gfc_current_locus;
593 if (gfc_rename_list == NULL)
594 gfc_rename_list = new_use;
596 tail->next = new_use;
599 /* See what kind of interface we're dealing with. Assume it is
601 new_use->op = INTRINSIC_NONE;
602 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
607 case INTERFACE_NAMELESS:
608 gfc_error ("Missing generic specification in USE statement at %C");
611 case INTERFACE_USER_OP:
612 case INTERFACE_GENERIC:
613 m = gfc_match (" =>");
615 if (type == INTERFACE_USER_OP && m == MATCH_YES
616 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
617 "operators in USE statements at %C")
621 if (type == INTERFACE_USER_OP)
622 new_use->op = INTRINSIC_USER;
627 strcpy (new_use->use_name, name);
630 strcpy (new_use->local_name, name);
631 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
636 if (m == MATCH_ERROR)
644 strcpy (new_use->local_name, name);
646 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
651 if (m == MATCH_ERROR)
655 if (strcmp (new_use->use_name, module_name) == 0
656 || strcmp (new_use->local_name, module_name) == 0)
658 gfc_error ("The name '%s' at %C has already been used as "
659 "an external module name.", module_name);
664 case INTERFACE_INTRINSIC_OP:
672 if (gfc_match_eos () == MATCH_YES)
674 if (gfc_match_char (',') != MATCH_YES)
681 gfc_syntax_error (ST_USE);
689 /* Given a name and a number, inst, return the inst name
690 under which to load this symbol. Returns NULL if this
691 symbol shouldn't be loaded. If inst is zero, returns
692 the number of instances of this name. If interface is
693 true, a user-defined operator is sought, otherwise only
694 non-operators are sought. */
697 find_use_name_n (const char *name, int *inst, bool interface)
703 for (u = gfc_rename_list; u; u = u->next)
705 if (strcmp (u->use_name, name) != 0
706 || (u->op == INTRINSIC_USER && !interface)
707 || (u->op != INTRINSIC_USER && interface))
720 return only_flag ? NULL : name;
724 return (u->local_name[0] != '\0') ? u->local_name : name;
728 /* Given a name, return the name under which to load this symbol.
729 Returns NULL if this symbol shouldn't be loaded. */
732 find_use_name (const char *name, bool interface)
735 return find_use_name_n (name, &i, interface);
739 /* Given a real name, return the number of use names associated with it. */
742 number_use_names (const char *name, bool interface)
745 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 gfc_intrinsic_op value. */
1467 mio_intrinsic_op (gfc_intrinsic_op* op)
1469 /* FIXME: Would be nicer to do this via the operators symbolic name. */
1470 if (iomode == IO_OUTPUT)
1472 int converted = (int) *op;
1473 write_atom (ATOM_INTEGER, &converted);
1477 require_atom (ATOM_INTEGER);
1478 *op = (gfc_intrinsic_op) atom_int;
1483 /* Read or write a character pointer that points to a string on the heap. */
1486 mio_allocated_string (const char *s)
1488 if (iomode == IO_OUTPUT)
1490 write_atom (ATOM_STRING, s);
1495 require_atom (ATOM_STRING);
1501 /* Functions for quoting and unquoting strings. */
1504 quote_string (const gfc_char_t *s, const size_t slength)
1506 const gfc_char_t *p;
1510 /* Calculate the length we'll need: a backslash takes two ("\\"),
1511 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1512 for (p = s, i = 0; i < slength; p++, i++)
1516 else if (!gfc_wide_is_printable (*p))
1522 q = res = XCNEWVEC (char, len + 1);
1523 for (p = s, i = 0; i < slength; p++, i++)
1526 *q++ = '\\', *q++ = '\\';
1527 else if (!gfc_wide_is_printable (*p))
1529 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1530 (unsigned HOST_WIDE_INT) *p);
1534 *q++ = (unsigned char) *p;
1542 unquote_string (const char *s)
1548 for (p = s, len = 0; *p; p++, len++)
1555 else if (p[1] == 'U')
1556 p += 9; /* That is a "\U????????". */
1558 gfc_internal_error ("unquote_string(): got bad string");
1561 res = gfc_get_wide_string (len + 1);
1562 for (i = 0, p = s; i < len; i++, p++)
1567 res[i] = (unsigned char) *p;
1568 else if (p[1] == '\\')
1570 res[i] = (unsigned char) '\\';
1575 /* We read the 8-digits hexadecimal constant that follows. */
1580 gcc_assert (p[1] == 'U');
1581 for (j = 0; j < 8; j++)
1584 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1598 /* Read or write a character pointer that points to a wide string on the
1599 heap, performing quoting/unquoting of nonprintable characters using the
1600 form \U???????? (where each ? is a hexadecimal digit).
1601 Length is the length of the string, only known and used in output mode. */
1603 static const gfc_char_t *
1604 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1606 if (iomode == IO_OUTPUT)
1608 char *quoted = quote_string (s, length);
1609 write_atom (ATOM_STRING, quoted);
1615 gfc_char_t *unquoted;
1617 require_atom (ATOM_STRING);
1618 unquoted = unquote_string (atom_string);
1619 gfc_free (atom_string);
1625 /* Read or write a string that is in static memory. */
1628 mio_pool_string (const char **stringp)
1630 /* TODO: one could write the string only once, and refer to it via a
1633 /* As a special case we have to deal with a NULL string. This
1634 happens for the 'module' member of 'gfc_symbol's that are not in a
1635 module. We read / write these as the empty string. */
1636 if (iomode == IO_OUTPUT)
1638 const char *p = *stringp == NULL ? "" : *stringp;
1639 write_atom (ATOM_STRING, p);
1643 require_atom (ATOM_STRING);
1644 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1645 gfc_free (atom_string);
1650 /* Read or write a string that is inside of some already-allocated
1654 mio_internal_string (char *string)
1656 if (iomode == IO_OUTPUT)
1657 write_atom (ATOM_STRING, string);
1660 require_atom (ATOM_STRING);
1661 strcpy (string, atom_string);
1662 gfc_free (atom_string);
1668 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1669 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1670 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1671 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1672 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE, AB_ALLOC_COMP,
1673 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1674 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1675 AB_IS_CLASS, AB_PROCEDURE, AB_PROC_POINTER, AB_ASYNCHRONOUS, AB_CODIMENSION,
1680 static const mstring attr_bits[] =
1682 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1683 minit ("ASYNCHRONOUS", AB_ASYNCHRONOUS),
1684 minit ("DIMENSION", AB_DIMENSION),
1685 minit ("CODIMENSION", AB_CODIMENSION),
1686 minit ("EXTERNAL", AB_EXTERNAL),
1687 minit ("INTRINSIC", AB_INTRINSIC),
1688 minit ("OPTIONAL", AB_OPTIONAL),
1689 minit ("POINTER", AB_POINTER),
1690 minit ("VOLATILE", AB_VOLATILE),
1691 minit ("TARGET", AB_TARGET),
1692 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1693 minit ("DUMMY", AB_DUMMY),
1694 minit ("RESULT", AB_RESULT),
1695 minit ("DATA", AB_DATA),
1696 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1697 minit ("IN_COMMON", AB_IN_COMMON),
1698 minit ("FUNCTION", AB_FUNCTION),
1699 minit ("SUBROUTINE", AB_SUBROUTINE),
1700 minit ("SEQUENCE", AB_SEQUENCE),
1701 minit ("ELEMENTAL", AB_ELEMENTAL),
1702 minit ("PURE", AB_PURE),
1703 minit ("RECURSIVE", AB_RECURSIVE),
1704 minit ("GENERIC", AB_GENERIC),
1705 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1706 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1707 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1708 minit ("IS_BIND_C", AB_IS_BIND_C),
1709 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1710 minit ("IS_ISO_C", AB_IS_ISO_C),
1711 minit ("VALUE", AB_VALUE),
1712 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1713 minit ("COARRAY_COMP", AB_COARRAY_COMP),
1714 minit ("POINTER_COMP", AB_POINTER_COMP),
1715 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1716 minit ("ZERO_COMP", AB_ZERO_COMP),
1717 minit ("PROTECTED", AB_PROTECTED),
1718 minit ("ABSTRACT", AB_ABSTRACT),
1719 minit ("IS_CLASS", AB_IS_CLASS),
1720 minit ("PROCEDURE", AB_PROCEDURE),
1721 minit ("PROC_POINTER", AB_PROC_POINTER),
1725 /* For binding attributes. */
1726 static const mstring binding_passing[] =
1729 minit ("NOPASS", 1),
1732 static const mstring binding_overriding[] =
1734 minit ("OVERRIDABLE", 0),
1735 minit ("NON_OVERRIDABLE", 1),
1736 minit ("DEFERRED", 2),
1739 static const mstring binding_generic[] =
1741 minit ("SPECIFIC", 0),
1742 minit ("GENERIC", 1),
1745 static const mstring binding_ppc[] =
1747 minit ("NO_PPC", 0),
1752 /* Specialization of mio_name. */
1753 DECL_MIO_NAME (ab_attribute)
1754 DECL_MIO_NAME (ar_type)
1755 DECL_MIO_NAME (array_type)
1757 DECL_MIO_NAME (expr_t)
1758 DECL_MIO_NAME (gfc_access)
1759 DECL_MIO_NAME (gfc_intrinsic_op)
1760 DECL_MIO_NAME (ifsrc)
1761 DECL_MIO_NAME (save_state)
1762 DECL_MIO_NAME (procedure_type)
1763 DECL_MIO_NAME (ref_type)
1764 DECL_MIO_NAME (sym_flavor)
1765 DECL_MIO_NAME (sym_intent)
1766 #undef DECL_MIO_NAME
1768 /* Symbol attributes are stored in list with the first three elements
1769 being the enumerated fields, while the remaining elements (if any)
1770 indicate the individual attribute bits. The access field is not
1771 saved-- it controls what symbols are exported when a module is
1775 mio_symbol_attribute (symbol_attribute *attr)
1778 unsigned ext_attr,extension_level;
1782 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1783 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1784 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1785 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1786 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1788 ext_attr = attr->ext_attr;
1789 mio_integer ((int *) &ext_attr);
1790 attr->ext_attr = ext_attr;
1792 extension_level = attr->extension;
1793 mio_integer ((int *) &extension_level);
1794 attr->extension = extension_level;
1796 if (iomode == IO_OUTPUT)
1798 if (attr->allocatable)
1799 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1800 if (attr->asynchronous)
1801 MIO_NAME (ab_attribute) (AB_ASYNCHRONOUS, attr_bits);
1802 if (attr->dimension)
1803 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1804 if (attr->codimension)
1805 MIO_NAME (ab_attribute) (AB_CODIMENSION, attr_bits);
1807 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1808 if (attr->intrinsic)
1809 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1811 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1813 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1814 if (attr->is_protected)
1815 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1817 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1818 if (attr->volatile_)
1819 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1821 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1822 if (attr->threadprivate)
1823 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1825 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1827 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1828 /* We deliberately don't preserve the "entry" flag. */
1831 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1832 if (attr->in_namelist)
1833 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1834 if (attr->in_common)
1835 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1838 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1839 if (attr->subroutine)
1840 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1842 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1844 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1847 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1848 if (attr->elemental)
1849 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1851 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1852 if (attr->recursive)
1853 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1854 if (attr->always_explicit)
1855 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1856 if (attr->cray_pointer)
1857 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1858 if (attr->cray_pointee)
1859 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1860 if (attr->is_bind_c)
1861 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1862 if (attr->is_c_interop)
1863 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1865 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1866 if (attr->alloc_comp)
1867 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1868 if (attr->pointer_comp)
1869 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1870 if (attr->private_comp)
1871 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1872 if (attr->coarray_comp)
1873 MIO_NAME (ab_attribute) (AB_COARRAY_COMP, attr_bits);
1874 if (attr->zero_comp)
1875 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1877 MIO_NAME (ab_attribute) (AB_IS_CLASS, attr_bits);
1878 if (attr->procedure)
1879 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1880 if (attr->proc_pointer)
1881 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1891 if (t == ATOM_RPAREN)
1894 bad_module ("Expected attribute bit name");
1896 switch ((ab_attribute) find_enum (attr_bits))
1898 case AB_ALLOCATABLE:
1899 attr->allocatable = 1;
1901 case AB_ASYNCHRONOUS:
1902 attr->asynchronous = 1;
1905 attr->dimension = 1;
1907 case AB_CODIMENSION:
1908 attr->codimension = 1;
1914 attr->intrinsic = 1;
1923 attr->is_protected = 1;
1929 attr->volatile_ = 1;
1934 case AB_THREADPRIVATE:
1935 attr->threadprivate = 1;
1946 case AB_IN_NAMELIST:
1947 attr->in_namelist = 1;
1950 attr->in_common = 1;
1956 attr->subroutine = 1;
1968 attr->elemental = 1;
1974 attr->recursive = 1;
1976 case AB_ALWAYS_EXPLICIT:
1977 attr->always_explicit = 1;
1979 case AB_CRAY_POINTER:
1980 attr->cray_pointer = 1;
1982 case AB_CRAY_POINTEE:
1983 attr->cray_pointee = 1;
1986 attr->is_bind_c = 1;
1988 case AB_IS_C_INTEROP:
1989 attr->is_c_interop = 1;
1995 attr->alloc_comp = 1;
1997 case AB_COARRAY_COMP:
1998 attr->coarray_comp = 1;
2000 case AB_POINTER_COMP:
2001 attr->pointer_comp = 1;
2003 case AB_PRIVATE_COMP:
2004 attr->private_comp = 1;
2007 attr->zero_comp = 1;
2013 attr->procedure = 1;
2015 case AB_PROC_POINTER:
2016 attr->proc_pointer = 1;
2024 static const mstring bt_types[] = {
2025 minit ("INTEGER", BT_INTEGER),
2026 minit ("REAL", BT_REAL),
2027 minit ("COMPLEX", BT_COMPLEX),
2028 minit ("LOGICAL", BT_LOGICAL),
2029 minit ("CHARACTER", BT_CHARACTER),
2030 minit ("DERIVED", BT_DERIVED),
2031 minit ("CLASS", BT_CLASS),
2032 minit ("PROCEDURE", BT_PROCEDURE),
2033 minit ("UNKNOWN", BT_UNKNOWN),
2034 minit ("VOID", BT_VOID),
2040 mio_charlen (gfc_charlen **clp)
2046 if (iomode == IO_OUTPUT)
2050 mio_expr (&cl->length);
2054 if (peek_atom () != ATOM_RPAREN)
2056 cl = gfc_new_charlen (gfc_current_ns, NULL);
2057 mio_expr (&cl->length);
2066 /* See if a name is a generated name. */
2069 check_unique_name (const char *name)
2071 return *name == '@';
2076 mio_typespec (gfc_typespec *ts)
2080 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2082 if (ts->type != BT_DERIVED && ts->type != BT_CLASS)
2083 mio_integer (&ts->kind);
2085 mio_symbol_ref (&ts->u.derived);
2087 /* Add info for C interop and is_iso_c. */
2088 mio_integer (&ts->is_c_interop);
2089 mio_integer (&ts->is_iso_c);
2091 /* If the typespec is for an identifier either from iso_c_binding, or
2092 a constant that was initialized to an identifier from it, use the
2093 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2095 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2097 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2099 if (ts->type != BT_CHARACTER)
2101 /* ts->u.cl is only valid for BT_CHARACTER. */
2106 mio_charlen (&ts->u.cl);
2112 static const mstring array_spec_types[] = {
2113 minit ("EXPLICIT", AS_EXPLICIT),
2114 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2115 minit ("DEFERRED", AS_DEFERRED),
2116 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2122 mio_array_spec (gfc_array_spec **asp)
2129 if (iomode == IO_OUTPUT)
2137 if (peek_atom () == ATOM_RPAREN)
2143 *asp = as = gfc_get_array_spec ();
2146 mio_integer (&as->rank);
2147 mio_integer (&as->corank);
2148 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2150 for (i = 0; i < as->rank + as->corank; i++)
2152 mio_expr (&as->lower[i]);
2153 mio_expr (&as->upper[i]);
2161 /* Given a pointer to an array reference structure (which lives in a
2162 gfc_ref structure), find the corresponding array specification
2163 structure. Storing the pointer in the ref structure doesn't quite
2164 work when loading from a module. Generating code for an array
2165 reference also needs more information than just the array spec. */
2167 static const mstring array_ref_types[] = {
2168 minit ("FULL", AR_FULL),
2169 minit ("ELEMENT", AR_ELEMENT),
2170 minit ("SECTION", AR_SECTION),
2176 mio_array_ref (gfc_array_ref *ar)
2181 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2182 mio_integer (&ar->dimen);
2190 for (i = 0; i < ar->dimen; i++)
2191 mio_expr (&ar->start[i]);
2196 for (i = 0; i < ar->dimen; i++)
2198 mio_expr (&ar->start[i]);
2199 mio_expr (&ar->end[i]);
2200 mio_expr (&ar->stride[i]);
2206 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2209 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2210 we can't call mio_integer directly. Instead loop over each element
2211 and cast it to/from an integer. */
2212 if (iomode == IO_OUTPUT)
2214 for (i = 0; i < ar->dimen; i++)
2216 int tmp = (int)ar->dimen_type[i];
2217 write_atom (ATOM_INTEGER, &tmp);
2222 for (i = 0; i < ar->dimen; i++)
2224 require_atom (ATOM_INTEGER);
2225 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2229 if (iomode == IO_INPUT)
2231 ar->where = gfc_current_locus;
2233 for (i = 0; i < ar->dimen; i++)
2234 ar->c_where[i] = gfc_current_locus;
2241 /* Saves or restores a pointer. The pointer is converted back and
2242 forth from an integer. We return the pointer_info pointer so that
2243 the caller can take additional action based on the pointer type. */
2245 static pointer_info *
2246 mio_pointer_ref (void *gp)
2250 if (iomode == IO_OUTPUT)
2252 p = get_pointer (*((char **) gp));
2253 write_atom (ATOM_INTEGER, &p->integer);
2257 require_atom (ATOM_INTEGER);
2258 p = add_fixup (atom_int, gp);
2265 /* Save and load references to components that occur within
2266 expressions. We have to describe these references by a number and
2267 by name. The number is necessary for forward references during
2268 reading, and the name is necessary if the symbol already exists in
2269 the namespace and is not loaded again. */
2272 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2274 char name[GFC_MAX_SYMBOL_LEN + 1];
2278 p = mio_pointer_ref (cp);
2279 if (p->type == P_UNKNOWN)
2280 p->type = P_COMPONENT;
2282 if (iomode == IO_OUTPUT)
2283 mio_pool_string (&(*cp)->name);
2286 mio_internal_string (name);
2288 /* It can happen that a component reference can be read before the
2289 associated derived type symbol has been loaded. Return now and
2290 wait for a later iteration of load_needed. */
2294 if (sym->components != NULL && p->u.pointer == NULL)
2296 /* Symbol already loaded, so search by name. */
2297 for (q = sym->components; q; q = q->next)
2298 if (strcmp (q->name, name) == 0)
2302 gfc_internal_error ("mio_component_ref(): Component not found");
2304 associate_integer_pointer (p, q);
2307 /* Make sure this symbol will eventually be loaded. */
2308 p = find_pointer2 (sym);
2309 if (p->u.rsym.state == UNUSED)
2310 p->u.rsym.state = NEEDED;
2315 static void mio_namespace_ref (gfc_namespace **nsp);
2316 static void mio_formal_arglist (gfc_formal_arglist **formal);
2317 static void mio_typebound_proc (gfc_typebound_proc** proc);
2320 mio_component (gfc_component *c)
2324 gfc_formal_arglist *formal;
2328 if (iomode == IO_OUTPUT)
2330 p = get_pointer (c);
2331 mio_integer (&p->integer);
2336 p = get_integer (n);
2337 associate_integer_pointer (p, c);
2340 if (p->type == P_UNKNOWN)
2341 p->type = P_COMPONENT;
2343 mio_pool_string (&c->name);
2344 mio_typespec (&c->ts);
2345 mio_array_spec (&c->as);
2347 mio_symbol_attribute (&c->attr);
2348 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2350 mio_expr (&c->initializer);
2352 if (c->attr.proc_pointer)
2354 if (iomode == IO_OUTPUT)
2357 while (formal && !formal->sym)
2358 formal = formal->next;
2361 mio_namespace_ref (&formal->sym->ns);
2363 mio_namespace_ref (&c->formal_ns);
2367 mio_namespace_ref (&c->formal_ns);
2368 /* TODO: if (c->formal_ns)
2370 c->formal_ns->proc_name = c;
2375 mio_formal_arglist (&c->formal);
2377 mio_typebound_proc (&c->tb);
2385 mio_component_list (gfc_component **cp)
2387 gfc_component *c, *tail;
2391 if (iomode == IO_OUTPUT)
2393 for (c = *cp; c; c = c->next)
2403 if (peek_atom () == ATOM_RPAREN)
2406 c = gfc_get_component ();
2423 mio_actual_arg (gfc_actual_arglist *a)
2426 mio_pool_string (&a->name);
2427 mio_expr (&a->expr);
2433 mio_actual_arglist (gfc_actual_arglist **ap)
2435 gfc_actual_arglist *a, *tail;
2439 if (iomode == IO_OUTPUT)
2441 for (a = *ap; a; a = a->next)
2451 if (peek_atom () != ATOM_LPAREN)
2454 a = gfc_get_actual_arglist ();
2470 /* Read and write formal argument lists. */
2473 mio_formal_arglist (gfc_formal_arglist **formal)
2475 gfc_formal_arglist *f, *tail;
2479 if (iomode == IO_OUTPUT)
2481 for (f = *formal; f; f = f->next)
2482 mio_symbol_ref (&f->sym);
2486 *formal = tail = NULL;
2488 while (peek_atom () != ATOM_RPAREN)
2490 f = gfc_get_formal_arglist ();
2491 mio_symbol_ref (&f->sym);
2493 if (*formal == NULL)
2506 /* Save or restore a reference to a symbol node. */
2509 mio_symbol_ref (gfc_symbol **symp)
2513 p = mio_pointer_ref (symp);
2514 if (p->type == P_UNKNOWN)
2517 if (iomode == IO_OUTPUT)
2519 if (p->u.wsym.state == UNREFERENCED)
2520 p->u.wsym.state = NEEDS_WRITE;
2524 if (p->u.rsym.state == UNUSED)
2525 p->u.rsym.state = NEEDED;
2531 /* Save or restore a reference to a symtree node. */
2534 mio_symtree_ref (gfc_symtree **stp)
2539 if (iomode == IO_OUTPUT)
2540 mio_symbol_ref (&(*stp)->n.sym);
2543 require_atom (ATOM_INTEGER);
2544 p = get_integer (atom_int);
2546 /* An unused equivalence member; make a symbol and a symtree
2548 if (in_load_equiv && p->u.rsym.symtree == NULL)
2550 /* Since this is not used, it must have a unique name. */
2551 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2553 /* Make the symbol. */
2554 if (p->u.rsym.sym == NULL)
2556 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2558 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2561 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2562 p->u.rsym.symtree->n.sym->refs++;
2563 p->u.rsym.referenced = 1;
2565 /* If the symbol is PRIVATE and in COMMON, load_commons will
2566 generate a fixup symbol, which must be associated. */
2568 resolve_fixups (p->fixup, p->u.rsym.sym);
2572 if (p->type == P_UNKNOWN)
2575 if (p->u.rsym.state == UNUSED)
2576 p->u.rsym.state = NEEDED;
2578 if (p->u.rsym.symtree != NULL)
2580 *stp = p->u.rsym.symtree;
2584 f = XCNEW (fixup_t);
2586 f->next = p->u.rsym.stfixup;
2587 p->u.rsym.stfixup = f;
2589 f->pointer = (void **) stp;
2596 mio_iterator (gfc_iterator **ip)
2602 if (iomode == IO_OUTPUT)
2609 if (peek_atom () == ATOM_RPAREN)
2615 *ip = gfc_get_iterator ();
2620 mio_expr (&iter->var);
2621 mio_expr (&iter->start);
2622 mio_expr (&iter->end);
2623 mio_expr (&iter->step);
2631 mio_constructor (gfc_constructor **cp)
2633 gfc_constructor *c, *tail;
2637 if (iomode == IO_OUTPUT)
2639 for (c = *cp; c; c = c->next)
2642 mio_expr (&c->expr);
2643 mio_iterator (&c->iterator);
2652 while (peek_atom () != ATOM_RPAREN)
2654 c = gfc_get_constructor ();
2664 mio_expr (&c->expr);
2665 mio_iterator (&c->iterator);
2674 static const mstring ref_types[] = {
2675 minit ("ARRAY", REF_ARRAY),
2676 minit ("COMPONENT", REF_COMPONENT),
2677 minit ("SUBSTRING", REF_SUBSTRING),
2683 mio_ref (gfc_ref **rp)
2690 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2695 mio_array_ref (&r->u.ar);
2699 mio_symbol_ref (&r->u.c.sym);
2700 mio_component_ref (&r->u.c.component, r->u.c.sym);
2704 mio_expr (&r->u.ss.start);
2705 mio_expr (&r->u.ss.end);
2706 mio_charlen (&r->u.ss.length);
2715 mio_ref_list (gfc_ref **rp)
2717 gfc_ref *ref, *head, *tail;
2721 if (iomode == IO_OUTPUT)
2723 for (ref = *rp; ref; ref = ref->next)
2730 while (peek_atom () != ATOM_RPAREN)
2733 head = tail = gfc_get_ref ();
2736 tail->next = gfc_get_ref ();
2750 /* Read and write an integer value. */
2753 mio_gmp_integer (mpz_t *integer)
2757 if (iomode == IO_INPUT)
2759 if (parse_atom () != ATOM_STRING)
2760 bad_module ("Expected integer string");
2762 mpz_init (*integer);
2763 if (mpz_set_str (*integer, atom_string, 10))
2764 bad_module ("Error converting integer");
2766 gfc_free (atom_string);
2770 p = mpz_get_str (NULL, 10, *integer);
2771 write_atom (ATOM_STRING, p);
2778 mio_gmp_real (mpfr_t *real)
2783 if (iomode == IO_INPUT)
2785 if (parse_atom () != ATOM_STRING)
2786 bad_module ("Expected real string");
2789 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2790 gfc_free (atom_string);
2794 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2796 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2798 write_atom (ATOM_STRING, p);
2803 atom_string = XCNEWVEC (char, strlen (p) + 20);
2805 sprintf (atom_string, "0.%s@%ld", p, exponent);
2807 /* Fix negative numbers. */
2808 if (atom_string[2] == '-')
2810 atom_string[0] = '-';
2811 atom_string[1] = '0';
2812 atom_string[2] = '.';
2815 write_atom (ATOM_STRING, atom_string);
2817 gfc_free (atom_string);
2823 /* Save and restore the shape of an array constructor. */
2826 mio_shape (mpz_t **pshape, int rank)
2832 /* A NULL shape is represented by (). */
2835 if (iomode == IO_OUTPUT)
2847 if (t == ATOM_RPAREN)
2854 shape = gfc_get_shape (rank);
2858 for (n = 0; n < rank; n++)
2859 mio_gmp_integer (&shape[n]);
2865 static const mstring expr_types[] = {
2866 minit ("OP", EXPR_OP),
2867 minit ("FUNCTION", EXPR_FUNCTION),
2868 minit ("CONSTANT", EXPR_CONSTANT),
2869 minit ("VARIABLE", EXPR_VARIABLE),
2870 minit ("SUBSTRING", EXPR_SUBSTRING),
2871 minit ("STRUCTURE", EXPR_STRUCTURE),
2872 minit ("ARRAY", EXPR_ARRAY),
2873 minit ("NULL", EXPR_NULL),
2874 minit ("COMPCALL", EXPR_COMPCALL),
2878 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2879 generic operators, not in expressions. INTRINSIC_USER is also
2880 replaced by the correct function name by the time we see it. */
2882 static const mstring intrinsics[] =
2884 minit ("UPLUS", INTRINSIC_UPLUS),
2885 minit ("UMINUS", INTRINSIC_UMINUS),
2886 minit ("PLUS", INTRINSIC_PLUS),
2887 minit ("MINUS", INTRINSIC_MINUS),
2888 minit ("TIMES", INTRINSIC_TIMES),
2889 minit ("DIVIDE", INTRINSIC_DIVIDE),
2890 minit ("POWER", INTRINSIC_POWER),
2891 minit ("CONCAT", INTRINSIC_CONCAT),
2892 minit ("AND", INTRINSIC_AND),
2893 minit ("OR", INTRINSIC_OR),
2894 minit ("EQV", INTRINSIC_EQV),
2895 minit ("NEQV", INTRINSIC_NEQV),
2896 minit ("EQ_SIGN", INTRINSIC_EQ),
2897 minit ("EQ", INTRINSIC_EQ_OS),
2898 minit ("NE_SIGN", INTRINSIC_NE),
2899 minit ("NE", INTRINSIC_NE_OS),
2900 minit ("GT_SIGN", INTRINSIC_GT),
2901 minit ("GT", INTRINSIC_GT_OS),
2902 minit ("GE_SIGN", INTRINSIC_GE),
2903 minit ("GE", INTRINSIC_GE_OS),
2904 minit ("LT_SIGN", INTRINSIC_LT),
2905 minit ("LT", INTRINSIC_LT_OS),
2906 minit ("LE_SIGN", INTRINSIC_LE),
2907 minit ("LE", INTRINSIC_LE_OS),
2908 minit ("NOT", INTRINSIC_NOT),
2909 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2914 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2917 fix_mio_expr (gfc_expr *e)
2919 gfc_symtree *ns_st = NULL;
2922 if (iomode != IO_OUTPUT)
2927 /* If this is a symtree for a symbol that came from a contained module
2928 namespace, it has a unique name and we should look in the current
2929 namespace to see if the required, non-contained symbol is available
2930 yet. If so, the latter should be written. */
2931 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2932 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2933 e->symtree->n.sym->name);
2935 /* On the other hand, if the existing symbol is the module name or the
2936 new symbol is a dummy argument, do not do the promotion. */
2937 if (ns_st && ns_st->n.sym
2938 && ns_st->n.sym->attr.flavor != FL_MODULE
2939 && !e->symtree->n.sym->attr.dummy)
2942 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2946 /* In some circumstances, a function used in an initialization
2947 expression, in one use associated module, can fail to be
2948 coupled to its symtree when used in a specification
2949 expression in another module. */
2950 fname = e->value.function.esym ? e->value.function.esym->name
2951 : e->value.function.isym->name;
2952 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2957 /* This is probably a reference to a private procedure from another
2958 module. To prevent a segfault, make a generic with no specific
2959 instances. If this module is used, without the required
2960 specific coming from somewhere, the appropriate error message
2962 gfc_get_symbol (fname, gfc_current_ns, &sym);
2963 sym->attr.flavor = FL_PROCEDURE;
2964 sym->attr.generic = 1;
2965 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2970 /* Read and write expressions. The form "()" is allowed to indicate a
2974 mio_expr (gfc_expr **ep)
2982 if (iomode == IO_OUTPUT)
2991 MIO_NAME (expr_t) (e->expr_type, expr_types);
2996 if (t == ATOM_RPAREN)
3003 bad_module ("Expected expression type");
3005 e = *ep = gfc_get_expr ();
3006 e->where = gfc_current_locus;
3007 e->expr_type = (expr_t) find_enum (expr_types);
3010 mio_typespec (&e->ts);
3011 mio_integer (&e->rank);
3015 switch (e->expr_type)
3019 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
3021 switch (e->value.op.op)
3023 case INTRINSIC_UPLUS:
3024 case INTRINSIC_UMINUS:
3026 case INTRINSIC_PARENTHESES:
3027 mio_expr (&e->value.op.op1);
3030 case INTRINSIC_PLUS:
3031 case INTRINSIC_MINUS:
3032 case INTRINSIC_TIMES:
3033 case INTRINSIC_DIVIDE:
3034 case INTRINSIC_POWER:
3035 case INTRINSIC_CONCAT:
3039 case INTRINSIC_NEQV:
3041 case INTRINSIC_EQ_OS:
3043 case INTRINSIC_NE_OS:
3045 case INTRINSIC_GT_OS:
3047 case INTRINSIC_GE_OS:
3049 case INTRINSIC_LT_OS:
3051 case INTRINSIC_LE_OS:
3052 mio_expr (&e->value.op.op1);
3053 mio_expr (&e->value.op.op2);
3057 bad_module ("Bad operator");
3063 mio_symtree_ref (&e->symtree);
3064 mio_actual_arglist (&e->value.function.actual);
3066 if (iomode == IO_OUTPUT)
3068 e->value.function.name
3069 = mio_allocated_string (e->value.function.name);
3070 flag = e->value.function.esym != NULL;
3071 mio_integer (&flag);
3073 mio_symbol_ref (&e->value.function.esym);
3075 write_atom (ATOM_STRING, e->value.function.isym->name);
3079 require_atom (ATOM_STRING);
3080 e->value.function.name = gfc_get_string (atom_string);
3081 gfc_free (atom_string);
3083 mio_integer (&flag);
3085 mio_symbol_ref (&e->value.function.esym);
3088 require_atom (ATOM_STRING);
3089 e->value.function.isym = gfc_find_function (atom_string);
3090 gfc_free (atom_string);
3097 mio_symtree_ref (&e->symtree);
3098 mio_ref_list (&e->ref);
3101 case EXPR_SUBSTRING:
3102 e->value.character.string
3103 = CONST_CAST (gfc_char_t *,
3104 mio_allocated_wide_string (e->value.character.string,
3105 e->value.character.length));
3106 mio_ref_list (&e->ref);
3109 case EXPR_STRUCTURE:
3111 mio_constructor (&e->value.constructor);
3112 mio_shape (&e->shape, e->rank);
3119 mio_gmp_integer (&e->value.integer);
3123 gfc_set_model_kind (e->ts.kind);
3124 mio_gmp_real (&e->value.real);
3128 gfc_set_model_kind (e->ts.kind);
3129 mio_gmp_real (&mpc_realref (e->value.complex));
3130 mio_gmp_real (&mpc_imagref (e->value.complex));
3134 mio_integer (&e->value.logical);
3138 mio_integer (&e->value.character.length);
3139 e->value.character.string
3140 = CONST_CAST (gfc_char_t *,
3141 mio_allocated_wide_string (e->value.character.string,
3142 e->value.character.length));
3146 bad_module ("Bad type in constant expression");
3164 /* Read and write namelists. */
3167 mio_namelist (gfc_symbol *sym)
3169 gfc_namelist *n, *m;
3170 const char *check_name;
3174 if (iomode == IO_OUTPUT)
3176 for (n = sym->namelist; n; n = n->next)
3177 mio_symbol_ref (&n->sym);
3181 /* This departure from the standard is flagged as an error.
3182 It does, in fact, work correctly. TODO: Allow it
3184 if (sym->attr.flavor == FL_NAMELIST)
3186 check_name = find_use_name (sym->name, false);
3187 if (check_name && strcmp (check_name, sym->name) != 0)
3188 gfc_error ("Namelist %s cannot be renamed by USE "
3189 "association to %s", sym->name, check_name);
3193 while (peek_atom () != ATOM_RPAREN)
3195 n = gfc_get_namelist ();
3196 mio_symbol_ref (&n->sym);
3198 if (sym->namelist == NULL)
3205 sym->namelist_tail = m;
3212 /* Save/restore lists of gfc_interface structures. When loading an
3213 interface, we are really appending to the existing list of
3214 interfaces. Checking for duplicate and ambiguous interfaces has to
3215 be done later when all symbols have been loaded. */
3218 mio_interface_rest (gfc_interface **ip)
3220 gfc_interface *tail, *p;
3221 pointer_info *pi = NULL;
3223 if (iomode == IO_OUTPUT)
3226 for (p = *ip; p; p = p->next)
3227 mio_symbol_ref (&p->sym);
3242 if (peek_atom () == ATOM_RPAREN)
3245 p = gfc_get_interface ();
3246 p->where = gfc_current_locus;
3247 pi = mio_symbol_ref (&p->sym);
3263 /* Save/restore a nameless operator interface. */
3266 mio_interface (gfc_interface **ip)
3269 mio_interface_rest (ip);
3273 /* Save/restore a named operator interface. */
3276 mio_symbol_interface (const char **name, const char **module,
3280 mio_pool_string (name);
3281 mio_pool_string (module);
3282 mio_interface_rest (ip);
3287 mio_namespace_ref (gfc_namespace **nsp)
3292 p = mio_pointer_ref (nsp);
3294 if (p->type == P_UNKNOWN)
3295 p->type = P_NAMESPACE;
3297 if (iomode == IO_INPUT && p->integer != 0)
3299 ns = (gfc_namespace *) p->u.pointer;
3302 ns = gfc_get_namespace (NULL, 0);
3303 associate_integer_pointer (p, ns);
3311 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3313 static gfc_namespace* current_f2k_derived;
3316 mio_typebound_proc (gfc_typebound_proc** proc)
3319 int overriding_flag;
3321 if (iomode == IO_INPUT)
3323 *proc = gfc_get_typebound_proc ();
3324 (*proc)->where = gfc_current_locus;
3330 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3332 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3333 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3334 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3335 overriding_flag = mio_name (overriding_flag, binding_overriding);
3336 (*proc)->deferred = ((overriding_flag & 2) != 0);
3337 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3338 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3340 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3341 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3342 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3344 mio_pool_string (&((*proc)->pass_arg));
3346 flag = (int) (*proc)->pass_arg_num;
3347 mio_integer (&flag);
3348 (*proc)->pass_arg_num = (unsigned) flag;
3350 if ((*proc)->is_generic)
3356 if (iomode == IO_OUTPUT)
3357 for (g = (*proc)->u.generic; g; g = g->next)
3358 mio_allocated_string (g->specific_st->name);
3361 (*proc)->u.generic = NULL;
3362 while (peek_atom () != ATOM_RPAREN)
3364 gfc_symtree** sym_root;
3366 g = gfc_get_tbp_generic ();
3369 require_atom (ATOM_STRING);
3370 sym_root = ¤t_f2k_derived->tb_sym_root;
3371 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3372 gfc_free (atom_string);
3374 g->next = (*proc)->u.generic;
3375 (*proc)->u.generic = g;
3381 else if (!(*proc)->ppc)
3382 mio_symtree_ref (&(*proc)->u.specific);
3387 /* Walker-callback function for this purpose. */
3389 mio_typebound_symtree (gfc_symtree* st)
3391 if (iomode == IO_OUTPUT && !st->n.tb)
3394 if (iomode == IO_OUTPUT)
3397 mio_allocated_string (st->name);
3399 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3401 mio_typebound_proc (&st->n.tb);
3405 /* IO a full symtree (in all depth). */
3407 mio_full_typebound_tree (gfc_symtree** root)
3411 if (iomode == IO_OUTPUT)
3412 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3415 while (peek_atom () == ATOM_LPAREN)
3421 require_atom (ATOM_STRING);
3422 st = gfc_get_tbp_symtree (root, atom_string);
3423 gfc_free (atom_string);
3425 mio_typebound_symtree (st);
3433 mio_finalizer (gfc_finalizer **f)
3435 if (iomode == IO_OUTPUT)
3438 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3439 mio_symtree_ref (&(*f)->proc_tree);
3443 *f = gfc_get_finalizer ();
3444 (*f)->where = gfc_current_locus; /* Value should not matter. */
3447 mio_symtree_ref (&(*f)->proc_tree);
3448 (*f)->proc_sym = NULL;
3453 mio_f2k_derived (gfc_namespace *f2k)
3455 current_f2k_derived = f2k;
3457 /* Handle the list of finalizer procedures. */
3459 if (iomode == IO_OUTPUT)
3462 for (f = f2k->finalizers; f; f = f->next)
3467 f2k->finalizers = NULL;
3468 while (peek_atom () != ATOM_RPAREN)
3470 gfc_finalizer *cur = NULL;
3471 mio_finalizer (&cur);
3472 cur->next = f2k->finalizers;
3473 f2k->finalizers = cur;
3478 /* Handle type-bound procedures. */
3479 mio_full_typebound_tree (&f2k->tb_sym_root);
3481 /* Type-bound user operators. */
3482 mio_full_typebound_tree (&f2k->tb_uop_root);
3484 /* Type-bound intrinsic operators. */
3486 if (iomode == IO_OUTPUT)
3489 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3491 gfc_intrinsic_op realop;
3493 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3497 realop = (gfc_intrinsic_op) op;
3498 mio_intrinsic_op (&realop);
3499 mio_typebound_proc (&f2k->tb_op[op]);
3504 while (peek_atom () != ATOM_RPAREN)
3506 gfc_intrinsic_op op = GFC_INTRINSIC_BEGIN; /* Silence GCC. */
3509 mio_intrinsic_op (&op);
3510 mio_typebound_proc (&f2k->tb_op[op]);
3517 mio_full_f2k_derived (gfc_symbol *sym)
3521 if (iomode == IO_OUTPUT)
3523 if (sym->f2k_derived)
3524 mio_f2k_derived (sym->f2k_derived);
3528 if (peek_atom () != ATOM_RPAREN)
3530 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3531 mio_f2k_derived (sym->f2k_derived);
3534 gcc_assert (!sym->f2k_derived);
3541 /* Unlike most other routines, the address of the symbol node is already
3542 fixed on input and the name/module has already been filled in. */
3545 mio_symbol (gfc_symbol *sym)
3547 int intmod = INTMOD_NONE;
3551 mio_symbol_attribute (&sym->attr);
3552 mio_typespec (&sym->ts);
3554 if (iomode == IO_OUTPUT)
3555 mio_namespace_ref (&sym->formal_ns);
3558 mio_namespace_ref (&sym->formal_ns);
3561 sym->formal_ns->proc_name = sym;
3566 /* Save/restore common block links. */
3567 mio_symbol_ref (&sym->common_next);
3569 mio_formal_arglist (&sym->formal);
3571 if (sym->attr.flavor == FL_PARAMETER)
3572 mio_expr (&sym->value);
3574 mio_array_spec (&sym->as);
3576 mio_symbol_ref (&sym->result);
3578 if (sym->attr.cray_pointee)
3579 mio_symbol_ref (&sym->cp_pointer);
3581 /* Note that components are always saved, even if they are supposed
3582 to be private. Component access is checked during searching. */
3584 mio_component_list (&sym->components);
3586 if (sym->components != NULL)
3587 sym->component_access
3588 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3590 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3591 mio_full_f2k_derived (sym);
3595 /* Add the fields that say whether this is from an intrinsic module,
3596 and if so, what symbol it is within the module. */
3597 /* mio_integer (&(sym->from_intmod)); */
3598 if (iomode == IO_OUTPUT)
3600 intmod = sym->from_intmod;
3601 mio_integer (&intmod);
3605 mio_integer (&intmod);
3606 sym->from_intmod = (intmod_id) intmod;
3609 mio_integer (&(sym->intmod_sym_id));
3611 if (sym->attr.flavor == FL_DERIVED)
3612 mio_integer (&(sym->hash_value));
3618 /************************* Top level subroutines *************************/
3620 /* Given a root symtree node and a symbol, try to find a symtree that
3621 references the symbol that is not a unique name. */
3623 static gfc_symtree *
3624 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3626 gfc_symtree *s = NULL;
3631 s = find_symtree_for_symbol (st->right, sym);
3634 s = find_symtree_for_symbol (st->left, sym);
3638 if (st->n.sym == sym && !check_unique_name (st->name))
3645 /* A recursive function to look for a specific symbol by name and by
3646 module. Whilst several symtrees might point to one symbol, its
3647 is sufficient for the purposes here than one exist. Note that
3648 generic interfaces are distinguished as are symbols that have been
3649 renamed in another module. */
3650 static gfc_symtree *
3651 find_symbol (gfc_symtree *st, const char *name,
3652 const char *module, int generic)
3655 gfc_symtree *retval, *s;
3657 if (st == NULL || st->n.sym == NULL)
3660 c = strcmp (name, st->n.sym->name);
3661 if (c == 0 && st->n.sym->module
3662 && strcmp (module, st->n.sym->module) == 0
3663 && !check_unique_name (st->name))
3665 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3667 /* Detect symbols that are renamed by use association in another
3668 module by the absence of a symtree and null attr.use_rename,
3669 since the latter is not transmitted in the module file. */
3670 if (((!generic && !st->n.sym->attr.generic)
3671 || (generic && st->n.sym->attr.generic))
3672 && !(s == NULL && !st->n.sym->attr.use_rename))
3676 retval = find_symbol (st->left, name, module, generic);
3679 retval = find_symbol (st->right, name, module, generic);
3685 /* Skip a list between balanced left and right parens. */
3695 switch (parse_atom ())
3706 gfc_free (atom_string);
3718 /* Load operator interfaces from the module. Interfaces are unusual
3719 in that they attach themselves to existing symbols. */
3722 load_operator_interfaces (void)
3725 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3727 pointer_info *pi = NULL;
3732 while (peek_atom () != ATOM_RPAREN)
3736 mio_internal_string (name);
3737 mio_internal_string (module);
3739 n = number_use_names (name, true);
3742 for (i = 1; i <= n; i++)
3744 /* Decide if we need to load this one or not. */
3745 p = find_use_name_n (name, &i, true);
3749 while (parse_atom () != ATOM_RPAREN);
3755 uop = gfc_get_uop (p);
3756 pi = mio_interface_rest (&uop->op);
3760 if (gfc_find_uop (p, NULL))
3762 uop = gfc_get_uop (p);
3763 uop->op = gfc_get_interface ();
3764 uop->op->where = gfc_current_locus;
3765 add_fixup (pi->integer, &uop->op->sym);
3774 /* Load interfaces from the module. Interfaces are unusual in that
3775 they attach themselves to existing symbols. */
3778 load_generic_interfaces (void)
3781 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3783 gfc_interface *generic = NULL, *gen = NULL;
3785 bool ambiguous_set = false;
3789 while (peek_atom () != ATOM_RPAREN)
3793 mio_internal_string (name);
3794 mio_internal_string (module);
3796 n = number_use_names (name, false);
3797 renamed = n ? 1 : 0;
3800 for (i = 1; i <= n; i++)
3803 /* Decide if we need to load this one or not. */
3804 p = find_use_name_n (name, &i, false);
3806 st = find_symbol (gfc_current_ns->sym_root,
3807 name, module_name, 1);
3809 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3811 /* Skip the specific names for these cases. */
3812 while (i == 1 && parse_atom () != ATOM_RPAREN);
3817 /* If the symbol exists already and is being USEd without being
3818 in an ONLY clause, do not load a new symtree(11.3.2). */
3819 if (!only_flag && st)
3824 /* Make the symbol inaccessible if it has been added by a USE
3825 statement without an ONLY(11.3.2). */
3827 && !st->n.sym->attr.use_only
3828 && !st->n.sym->attr.use_rename
3829 && strcmp (st->n.sym->module, module_name) == 0)
3832 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3833 st = gfc_get_unique_symtree (gfc_current_ns);
3840 if (strcmp (st->name, p) != 0)
3842 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3848 /* Since we haven't found a valid generic interface, we had
3852 gfc_get_symbol (p, NULL, &sym);
3853 sym->name = gfc_get_string (name);
3854 sym->module = gfc_get_string (module_name);
3855 sym->attr.flavor = FL_PROCEDURE;
3856 sym->attr.generic = 1;
3857 sym->attr.use_assoc = 1;
3862 /* Unless sym is a generic interface, this reference
3865 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3869 if (st && !sym->attr.generic
3872 && strcmp(module, sym->module))
3874 ambiguous_set = true;
3879 sym->attr.use_only = only_flag;
3880 sym->attr.use_rename = renamed;
3884 mio_interface_rest (&sym->generic);
3885 generic = sym->generic;
3887 else if (!sym->generic)
3889 sym->generic = generic;
3890 sym->attr.generic_copy = 1;
3893 /* If a procedure that is not generic has generic interfaces
3894 that include itself, it is generic! We need to take care
3895 to retain symbols ambiguous that were already so. */
3896 if (sym->attr.use_assoc
3897 && !sym->attr.generic
3898 && sym->attr.flavor == FL_PROCEDURE)
3900 for (gen = generic; gen; gen = gen->next)
3902 if (gen->sym == sym)
3904 sym->attr.generic = 1;
3919 /* Load common blocks. */
3924 char name[GFC_MAX_SYMBOL_LEN + 1];
3929 while (peek_atom () != ATOM_RPAREN)
3933 mio_internal_string (name);
3935 p = gfc_get_common (name, 1);
3937 mio_symbol_ref (&p->head);
3938 mio_integer (&flags);
3942 p->threadprivate = 1;
3945 /* Get whether this was a bind(c) common or not. */
3946 mio_integer (&p->is_bind_c);
3947 /* Get the binding label. */
3948 mio_internal_string (p->binding_label);
3957 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3958 so that unused variables are not loaded and so that the expression can
3964 gfc_equiv *head, *tail, *end, *eq;
3968 in_load_equiv = true;
3970 end = gfc_current_ns->equiv;
3971 while (end != NULL && end->next != NULL)
3974 while (peek_atom () != ATOM_RPAREN) {
3978 while(peek_atom () != ATOM_RPAREN)
3981 head = tail = gfc_get_equiv ();
3984 tail->eq = gfc_get_equiv ();
3988 mio_pool_string (&tail->module);
3989 mio_expr (&tail->expr);
3992 /* Unused equivalence members have a unique name. In addition, it
3993 must be checked that the symbols are from the same module. */
3995 for (eq = head; eq; eq = eq->eq)
3997 if (eq->expr->symtree->n.sym->module
3998 && head->expr->symtree->n.sym->module
3999 && strcmp (head->expr->symtree->n.sym->module,
4000 eq->expr->symtree->n.sym->module) == 0
4001 && !check_unique_name (eq->expr->symtree->name))
4010 for (eq = head; eq; eq = head)
4013 gfc_free_expr (eq->expr);
4019 gfc_current_ns->equiv = head;
4030 in_load_equiv = false;
4034 /* This function loads the sym_root of f2k_derived with the extensions to
4035 the derived type. */
4037 load_derived_extensions (void)
4040 gfc_symbol *derived;
4044 char name[GFC_MAX_SYMBOL_LEN + 1];
4045 char module[GFC_MAX_SYMBOL_LEN + 1];
4049 while (peek_atom () != ATOM_RPAREN)
4052 mio_integer (&symbol);
4053 info = get_integer (symbol);
4054 derived = info->u.rsym.sym;
4056 /* This one is not being loaded. */
4057 if (!info || !derived)
4059 while (peek_atom () != ATOM_RPAREN)
4064 gcc_assert (derived->attr.flavor == FL_DERIVED);
4065 if (derived->f2k_derived == NULL)
4066 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4068 while (peek_atom () != ATOM_RPAREN)
4071 mio_internal_string (name);
4072 mio_internal_string (module);
4074 /* Only use one use name to find the symbol. */
4076 p = find_use_name_n (name, &j, false);
4079 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4081 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4084 /* Only use the real name in f2k_derived to ensure a single
4086 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4099 /* Recursive function to traverse the pointer_info tree and load a
4100 needed symbol. We return nonzero if we load a symbol and stop the
4101 traversal, because the act of loading can alter the tree. */
4104 load_needed (pointer_info *p)
4115 rv |= load_needed (p->left);
4116 rv |= load_needed (p->right);
4118 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4121 p->u.rsym.state = USED;
4123 set_module_locus (&p->u.rsym.where);
4125 sym = p->u.rsym.sym;
4128 q = get_integer (p->u.rsym.ns);
4130 ns = (gfc_namespace *) q->u.pointer;
4133 /* Create an interface namespace if necessary. These are
4134 the namespaces that hold the formal parameters of module
4137 ns = gfc_get_namespace (NULL, 0);
4138 associate_integer_pointer (q, ns);
4141 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4142 doesn't go pear-shaped if the symbol is used. */
4144 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4147 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4148 sym->module = gfc_get_string (p->u.rsym.module);
4149 strcpy (sym->binding_label, p->u.rsym.binding_label);
4151 associate_integer_pointer (p, sym);
4155 sym->attr.use_assoc = 1;
4157 sym->attr.use_only = 1;
4158 if (p->u.rsym.renamed)
4159 sym->attr.use_rename = 1;
4165 /* Recursive function for cleaning up things after a module has been read. */
4168 read_cleanup (pointer_info *p)
4176 read_cleanup (p->left);
4177 read_cleanup (p->right);
4179 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4181 /* Add hidden symbols to the symtree. */
4182 q = get_integer (p->u.rsym.ns);
4183 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
4185 st->n.sym = p->u.rsym.sym;
4188 /* Fixup any symtree references. */
4189 p->u.rsym.symtree = st;
4190 resolve_fixups (p->u.rsym.stfixup, st);
4191 p->u.rsym.stfixup = NULL;
4194 /* Free unused symbols. */
4195 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4196 gfc_free_symbol (p->u.rsym.sym);
4200 /* It is not quite enough to check for ambiguity in the symbols by
4201 the loaded symbol and the new symbol not being identical. */
4203 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4207 symbol_attribute attr;
4209 rsym = info->u.rsym.sym;
4213 /* If the existing symbol is generic from a different module and
4214 the new symbol is generic there can be no ambiguity. */
4215 if (st_sym->attr.generic
4217 && strcmp (st_sym->module, module_name))
4219 /* The new symbol's attributes have not yet been read. Since
4220 we need attr.generic, read it directly. */
4221 get_module_locus (&locus);
4222 set_module_locus (&info->u.rsym.where);
4225 mio_symbol_attribute (&attr);
4226 set_module_locus (&locus);
4235 /* Read a module file. */
4240 module_locus operator_interfaces, user_operators, extensions;
4242 char name[GFC_MAX_SYMBOL_LEN + 1];
4244 int ambiguous, j, nuse, symbol;
4245 pointer_info *info, *q;
4250 get_module_locus (&operator_interfaces); /* Skip these for now. */
4253 get_module_locus (&user_operators);
4257 /* Skip commons, equivalences and derived type extensions for now. */
4261 get_module_locus (&extensions);
4266 /* Create the fixup nodes for all the symbols. */
4268 while (peek_atom () != ATOM_RPAREN)
4270 require_atom (ATOM_INTEGER);
4271 info = get_integer (atom_int);
4273 info->type = P_SYMBOL;
4274 info->u.rsym.state = UNUSED;
4276 mio_internal_string (info->u.rsym.true_name);
4277 mio_internal_string (info->u.rsym.module);
4278 mio_internal_string (info->u.rsym.binding_label);
4281 require_atom (ATOM_INTEGER);
4282 info->u.rsym.ns = atom_int;
4284 get_module_locus (&info->u.rsym.where);
4287 /* See if the symbol has already been loaded by a previous module.
4288 If so, we reference the existing symbol and prevent it from
4289 being loaded again. This should not happen if the symbol being
4290 read is an index for an assumed shape dummy array (ns != 1). */
4292 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4295 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4298 info->u.rsym.state = USED;
4299 info->u.rsym.sym = sym;
4301 /* Some symbols do not have a namespace (eg. formal arguments),
4302 so the automatic "unique symtree" mechanism must be suppressed
4303 by marking them as referenced. */
4304 q = get_integer (info->u.rsym.ns);
4305 if (q->u.pointer == NULL)
4307 info->u.rsym.referenced = 1;
4311 /* If possible recycle the symtree that references the symbol.
4312 If a symtree is not found and the module does not import one,
4313 a unique-name symtree is found by read_cleanup. */
4314 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4317 info->u.rsym.symtree = st;
4318 info->u.rsym.referenced = 1;
4324 /* Parse the symtree lists. This lets us mark which symbols need to
4325 be loaded. Renaming is also done at this point by replacing the
4330 while (peek_atom () != ATOM_RPAREN)
4332 mio_internal_string (name);
4333 mio_integer (&ambiguous);
4334 mio_integer (&symbol);
4336 info = get_integer (symbol);
4338 /* See how many use names there are. If none, go through the start
4339 of the loop at least once. */
4340 nuse = number_use_names (name, false);
4341 info->u.rsym.renamed = nuse ? 1 : 0;
4346 for (j = 1; j <= nuse; j++)
4348 /* Get the jth local name for this symbol. */
4349 p = find_use_name_n (name, &j, false);
4351 if (p == NULL && strcmp (name, module_name) == 0)
4354 /* Skip symtree nodes not in an ONLY clause, unless there
4355 is an existing symtree loaded from another USE statement. */
4358 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4360 info->u.rsym.symtree = st;
4364 /* If a symbol of the same name and module exists already,
4365 this symbol, which is not in an ONLY clause, must not be
4366 added to the namespace(11.3.2). Note that find_symbol
4367 only returns the first occurrence that it finds. */
4368 if (!only_flag && !info->u.rsym.renamed
4369 && strcmp (name, module_name) != 0
4370 && find_symbol (gfc_current_ns->sym_root, name,
4374 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4378 /* Check for ambiguous symbols. */
4379 if (check_for_ambiguous (st->n.sym, info))
4381 info->u.rsym.symtree = st;
4385 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4387 /* Delete the symtree if the symbol has been added by a USE
4388 statement without an ONLY(11.3.2). Remember that the rsym
4389 will be the same as the symbol found in the symtree, for
4391 if (st && (only_flag || info->u.rsym.renamed)
4392 && !st->n.sym->attr.use_only
4393 && !st->n.sym->attr.use_rename
4394 && info->u.rsym.sym == st->n.sym)
4395 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4397 /* Create a symtree node in the current namespace for this
4399 st = check_unique_name (p)
4400 ? gfc_get_unique_symtree (gfc_current_ns)
4401 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4402 st->ambiguous = ambiguous;
4404 sym = info->u.rsym.sym;
4406 /* Create a symbol node if it doesn't already exist. */
4409 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4411 sym = info->u.rsym.sym;
4412 sym->module = gfc_get_string (info->u.rsym.module);
4414 /* TODO: hmm, can we test this? Do we know it will be
4415 initialized to zeros? */
4416 if (info->u.rsym.binding_label[0] != '\0')
4417 strcpy (sym->binding_label, info->u.rsym.binding_label);
4423 if (strcmp (name, p) != 0)
4424 sym->attr.use_rename = 1;
4426 /* We need to set the only_flag here so that symbols from the
4427 same USE...ONLY but earlier are not deleted from the tree in
4428 the gfc_delete_symtree above. */
4429 sym->attr.use_only = only_flag;
4431 /* Store the symtree pointing to this symbol. */
4432 info->u.rsym.symtree = st;
4434 if (info->u.rsym.state == UNUSED)
4435 info->u.rsym.state = NEEDED;
4436 info->u.rsym.referenced = 1;
4443 /* Load intrinsic operator interfaces. */
4444 set_module_locus (&operator_interfaces);
4447 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4449 if (i == INTRINSIC_USER)
4454 u = find_use_operator ((gfc_intrinsic_op) i);
4465 mio_interface (&gfc_current_ns->op[i]);
4470 /* Load generic and user operator interfaces. These must follow the
4471 loading of symtree because otherwise symbols can be marked as
4474 set_module_locus (&user_operators);
4476 load_operator_interfaces ();
4477 load_generic_interfaces ();
4482 /* At this point, we read those symbols that are needed but haven't
4483 been loaded yet. If one symbol requires another, the other gets
4484 marked as NEEDED if its previous state was UNUSED. */
4486 while (load_needed (pi_root));
4488 /* Make sure all elements of the rename-list were found in the module. */
4490 for (u = gfc_rename_list; u; u = u->next)
4495 if (u->op == INTRINSIC_NONE)
4497 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4498 u->use_name, &u->where, module_name);
4502 if (u->op == INTRINSIC_USER)
4504 gfc_error ("User operator '%s' referenced at %L not found "
4505 "in module '%s'", u->use_name, &u->where, module_name);
4509 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4510 "in module '%s'", gfc_op2string (u->op), &u->where,
4514 /* Now we should be in a position to fill f2k_derived with derived type
4515 extensions, since everything has been loaded. */
4516 set_module_locus (&extensions);
4517 load_derived_extensions ();
4519 /* Clean up symbol nodes that were never loaded, create references
4520 to hidden symbols. */
4522 read_cleanup (pi_root);
4526 /* Given an access type that is specific to an entity and the default
4527 access, return nonzero if the entity is publicly accessible. If the
4528 element is declared as PUBLIC, then it is public; if declared
4529 PRIVATE, then private, and otherwise it is public unless the default
4530 access in this context has been declared PRIVATE. */
4533 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4535 if (specific_access == ACCESS_PUBLIC)
4537 if (specific_access == ACCESS_PRIVATE)
4540 if (gfc_option.flag_module_private)
4541 return default_access == ACCESS_PUBLIC;
4543 return default_access != ACCESS_PRIVATE;
4547 /* A structure to remember which commons we've already written. */
4549 struct written_common
4551 BBT_HEADER(written_common);
4552 const char *name, *label;
4555 static struct written_common *written_commons = NULL;
4557 /* Comparison function used for balancing the binary tree. */
4560 compare_written_commons (void *a1, void *b1)
4562 const char *aname = ((struct written_common *) a1)->name;
4563 const char *alabel = ((struct written_common *) a1)->label;
4564 const char *bname = ((struct written_common *) b1)->name;
4565 const char *blabel = ((struct written_common *) b1)->label;
4566 int c = strcmp (aname, bname);
4568 return (c != 0 ? c : strcmp (alabel, blabel));
4571 /* Free a list of written commons. */
4574 free_written_common (struct written_common *w)
4580 free_written_common (w->left);
4582 free_written_common (w->right);
4587 /* Write a common block to the module -- recursive helper function. */
4590 write_common_0 (gfc_symtree *st, bool this_module)
4596 struct written_common *w;
4597 bool write_me = true;
4602 write_common_0 (st->left, this_module);
4604 /* We will write out the binding label, or the name if no label given. */
4605 name = st->n.common->name;
4607 label = p->is_bind_c ? p->binding_label : p->name;
4609 /* Check if we've already output this common. */
4610 w = written_commons;
4613 int c = strcmp (name, w->name);
4614 c = (c != 0 ? c : strcmp (label, w->label));
4618 w = (c < 0) ? w->left : w->right;
4621 if (this_module && p->use_assoc)
4626 /* Write the common to the module. */
4628 mio_pool_string (&name);
4630 mio_symbol_ref (&p->head);
4631 flags = p->saved ? 1 : 0;
4632 if (p->threadprivate)
4634 mio_integer (&flags);
4636 /* Write out whether the common block is bind(c) or not. */
4637 mio_integer (&(p->is_bind_c));
4639 mio_pool_string (&label);
4642 /* Record that we have written this common. */
4643 w = XCNEW (struct written_common);
4646 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4649 write_common_0 (st->right, this_module);
4653 /* Write a common, by initializing the list of written commons, calling
4654 the recursive function write_common_0() and cleaning up afterwards. */
4657 write_common (gfc_symtree *st)
4659 written_commons = NULL;
4660 write_common_0 (st, true);
4661 write_common_0 (st, false);
4662 free_written_common (written_commons);
4663 written_commons = NULL;
4667 /* Write the blank common block to the module. */
4670 write_blank_common (void)
4672 const char * name = BLANK_COMMON_NAME;
4674 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4675 this, but it hasn't been checked. Just making it so for now. */
4678 if (gfc_current_ns->blank_common.head == NULL)
4683 mio_pool_string (&name);
4685 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4686 saved = gfc_current_ns->blank_common.saved;
4687 mio_integer (&saved);
4689 /* Write out whether the common block is bind(c) or not. */
4690 mio_integer (&is_bind_c);
4692 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4693 it doesn't matter because the label isn't used. */
4694 mio_pool_string (&name);
4700 /* Write equivalences to the module. */
4709 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4713 for (e = eq; e; e = e->eq)
4715 if (e->module == NULL)
4716 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4717 mio_allocated_string (e->module);
4718 mio_expr (&e->expr);
4727 /* Write derived type extensions to the module. */
4730 write_dt_extensions (gfc_symtree *st)
4732 if (!gfc_check_access (st->n.sym->attr.access,
4733 st->n.sym->ns->default_access))
4737 mio_pool_string (&st->n.sym->name);
4738 if (st->n.sym->module != NULL)
4739 mio_pool_string (&st->n.sym->module);
4741 mio_internal_string (module_name);
4746 write_derived_extensions (gfc_symtree *st)
4748 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4749 && (st->n.sym->f2k_derived != NULL)
4750 && (st->n.sym->f2k_derived->sym_root != NULL)))
4754 mio_symbol_ref (&(st->n.sym));
4755 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4756 write_dt_extensions);
4761 /* Write a symbol to the module. */
4764 write_symbol (int n, gfc_symbol *sym)
4768 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4769 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4772 mio_pool_string (&sym->name);
4774 mio_pool_string (&sym->module);
4775 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4777 label = sym->binding_label;
4778 mio_pool_string (&label);
4781 mio_pool_string (&sym->name);
4783 mio_pointer_ref (&sym->ns);
4790 /* Recursive traversal function to write the initial set of symbols to
4791 the module. We check to see if the symbol should be written
4792 according to the access specification. */
4795 write_symbol0 (gfc_symtree *st)
4799 bool dont_write = false;
4804 write_symbol0 (st->left);
4807 if (sym->module == NULL)
4808 sym->module = gfc_get_string (module_name);
4810 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4811 && !sym->attr.subroutine && !sym->attr.function)
4814 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4819 p = get_pointer (sym);
4820 if (p->type == P_UNKNOWN)
4823 if (p->u.wsym.state != WRITTEN)
4825 write_symbol (p->integer, sym);
4826 p->u.wsym.state = WRITTEN;
4830 write_symbol0 (st->right);
4834 /* Recursive traversal function to write the secondary set of symbols
4835 to the module file. These are symbols that were not public yet are
4836 needed by the public symbols or another dependent symbol. The act
4837 of writing a symbol can modify the pointer_info tree, so we cease
4838 traversal if we find a symbol to write. We return nonzero if a
4839 symbol was written and pass that information upwards. */
4842 write_symbol1 (pointer_info *p)
4849 result = write_symbol1 (p->left);
4851 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4853 p->u.wsym.state = WRITTEN;
4854 write_symbol (p->integer, p->u.wsym.sym);
4858 result |= write_symbol1 (p->right);
4863 /* Write operator interfaces associated with a symbol. */
4866 write_operator (gfc_user_op *uop)
4868 static char nullstring[] = "";
4869 const char *p = nullstring;
4872 || !gfc_check_access (uop->access, uop->ns->default_access))
4875 mio_symbol_interface (&uop->name, &p, &uop->op);
4879 /* Write generic interfaces from the namespace sym_root. */
4882 write_generic (gfc_symtree *st)
4889 write_generic (st->left);
4890 write_generic (st->right);
4893 if (!sym || check_unique_name (st->name))
4896 if (sym->generic == NULL
4897 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4900 if (sym->module == NULL)
4901 sym->module = gfc_get_string (module_name);
4903 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4908 write_symtree (gfc_symtree *st)
4915 /* A symbol in an interface body must not be visible in the
4917 if (sym->ns != gfc_current_ns
4918 && sym->ns->proc_name
4919 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4922 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4923 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4924 && !sym->attr.subroutine && !sym->attr.function))
4927 if (check_unique_name (st->name))
4930 p = find_pointer (sym);
4932 gfc_internal_error ("write_symtree(): Symbol not written");
4934 mio_pool_string (&st->name);
4935 mio_integer (&st->ambiguous);
4936 mio_integer (&p->integer);
4945 /* Write the operator interfaces. */
4948 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4950 if (i == INTRINSIC_USER)
4953 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4954 gfc_current_ns->default_access)
4955 ? &gfc_current_ns->op[i] : NULL);
4963 gfc_traverse_user_op (gfc_current_ns, write_operator);
4969 write_generic (gfc_current_ns->sym_root);
4975 write_blank_common ();
4976 write_common (gfc_current_ns->common_root);
4988 gfc_traverse_symtree (gfc_current_ns->sym_root,
4989 write_derived_extensions);
4994 /* Write symbol information. First we traverse all symbols in the
4995 primary namespace, writing those that need to be written.
4996 Sometimes writing one symbol will cause another to need to be
4997 written. A list of these symbols ends up on the write stack, and
4998 we end by popping the bottom of the stack and writing the symbol
4999 until the stack is empty. */
5003 write_symbol0 (gfc_current_ns->sym_root);
5004 while (write_symbol1 (pi_root))
5013 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
5018 /* Read a MD5 sum from the header of a module file. If the file cannot
5019 be opened, or we have any other error, we return -1. */
5022 read_md5_from_module_file (const char * filename, unsigned char md5[16])
5028 /* Open the file. */
5029 if ((file = fopen (filename, "r")) == NULL)
5032 /* Read the first line. */
5033 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5039 /* The file also needs to be overwritten if the version number changed. */
5040 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
5041 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
5047 /* Read a second line. */
5048 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5054 /* Close the file. */
5057 /* If the header is not what we expect, or is too short, bail out. */
5058 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5061 /* Now, we have a real MD5, read it into the array. */
5062 for (n = 0; n < 16; n++)
5066 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5076 /* Given module, dump it to disk. If there was an error while
5077 processing the module, dump_flag will be set to zero and we delete
5078 the module file, even if it was already there. */
5081 gfc_dump_module (const char *name, int dump_flag)
5084 char *filename, *filename_tmp, *p;
5087 unsigned char md5_new[16], md5_old[16];
5089 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5090 if (gfc_option.module_dir != NULL)
5092 n += strlen (gfc_option.module_dir);
5093 filename = (char *) alloca (n);
5094 strcpy (filename, gfc_option.module_dir);
5095 strcat (filename, name);
5099 filename = (char *) alloca (n);
5100 strcpy (filename, name);
5102 strcat (filename, MODULE_EXTENSION);
5104 /* Name of the temporary file used to write the module. */
5105 filename_tmp = (char *) alloca (n + 1);
5106 strcpy (filename_tmp, filename);
5107 strcat (filename_tmp, "0");
5109 /* There was an error while processing the module. We delete the
5110 module file, even if it was already there. */
5117 /* Write the module to the temporary file. */
5118 module_fp = fopen (filename_tmp, "w");
5119 if (module_fp == NULL)
5120 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5121 filename_tmp, strerror (errno));
5123 /* Write the header, including space reserved for the MD5 sum. */
5127 *strchr (p, '\n') = '\0';
5129 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5130 "MD5:", MOD_VERSION, gfc_source_file, p);
5131 fgetpos (module_fp, &md5_pos);
5132 fputs ("00000000000000000000000000000000 -- "
5133 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5135 /* Initialize the MD5 context that will be used for output. */
5136 md5_init_ctx (&ctx);
5138 /* Write the module itself. */
5140 strcpy (module_name, name);
5146 free_pi_tree (pi_root);
5151 /* Write the MD5 sum to the header of the module file. */
5152 md5_finish_ctx (&ctx, md5_new);
5153 fsetpos (module_fp, &md5_pos);
5154 for (n = 0; n < 16; n++)
5155 fprintf (module_fp, "%02x", md5_new[n]);
5157 if (fclose (module_fp))
5158 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5159 filename_tmp, strerror (errno));
5161 /* Read the MD5 from the header of the old module file and compare. */
5162 if (read_md5_from_module_file (filename, md5_old) != 0
5163 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5165 /* Module file have changed, replace the old one. */
5166 if (unlink (filename) && errno != ENOENT)
5167 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5169 if (rename (filename_tmp, filename))
5170 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5171 filename_tmp, filename, strerror (errno));
5175 if (unlink (filename_tmp))
5176 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5177 filename_tmp, strerror (errno));
5183 sort_iso_c_rename_list (void)
5185 gfc_use_rename *tmp_list = NULL;
5186 gfc_use_rename *curr;
5187 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
5191 for (curr = gfc_rename_list; curr; curr = curr->next)
5193 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
5194 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
5196 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5197 "intrinsic module ISO_C_BINDING.", curr->use_name,
5201 /* Put it in the list. */
5202 kinds_used[c_kind] = curr;
5205 /* Make a new (sorted) rename list. */
5207 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
5210 if (i < ISOCBINDING_NUMBER)
5212 tmp_list = kinds_used[i];
5216 for (; i < ISOCBINDING_NUMBER; i++)
5217 if (kinds_used[i] != NULL)
5219 curr->next = kinds_used[i];
5225 gfc_rename_list = tmp_list;
5229 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5230 the current namespace for all named constants, pointer types, and
5231 procedures in the module unless the only clause was used or a rename
5232 list was provided. */
5235 import_iso_c_binding_module (void)
5237 gfc_symbol *mod_sym = NULL;
5238 gfc_symtree *mod_symtree = NULL;
5239 const char *iso_c_module_name = "__iso_c_binding";
5244 /* Look only in the current namespace. */
5245 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5247 if (mod_symtree == NULL)
5249 /* symtree doesn't already exist in current namespace. */
5250 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5253 if (mod_symtree != NULL)
5254 mod_sym = mod_symtree->n.sym;
5256 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5257 "create symbol for %s", iso_c_module_name);
5259 mod_sym->attr.flavor = FL_MODULE;
5260 mod_sym->attr.intrinsic = 1;
5261 mod_sym->module = gfc_get_string (iso_c_module_name);
5262 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5265 /* Generate the symbols for the named constants representing
5266 the kinds for intrinsic data types. */
5269 /* Sort the rename list because there are dependencies between types
5270 and procedures (e.g., c_loc needs c_ptr). */
5271 sort_iso_c_rename_list ();
5273 for (u = gfc_rename_list; u; u = u->next)
5275 i = get_c_kind (u->use_name, c_interop_kinds_table);
5277 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
5279 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5280 "intrinsic module ISO_C_BINDING.", u->use_name,
5285 generate_isocbinding_symbol (iso_c_module_name,
5286 (iso_c_binding_symbol) i,
5292 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5295 for (u = gfc_rename_list; u; u = u->next)
5297 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5299 local_name = u->local_name;
5304 generate_isocbinding_symbol (iso_c_module_name,
5305 (iso_c_binding_symbol) i,
5309 for (u = gfc_rename_list; u; u = u->next)
5314 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5315 "module ISO_C_BINDING", u->use_name, &u->where);
5321 /* Add an integer named constant from a given module. */
5324 create_int_parameter (const char *name, int value, const char *modname,
5325 intmod_id module, int id)
5327 gfc_symtree *tmp_symtree;
5330 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5331 if (tmp_symtree != NULL)
5333 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5336 gfc_error ("Symbol '%s' already declared", name);
5339 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5340 sym = tmp_symtree->n.sym;
5342 sym->module = gfc_get_string (modname);
5343 sym->attr.flavor = FL_PARAMETER;
5344 sym->ts.type = BT_INTEGER;
5345 sym->ts.kind = gfc_default_integer_kind;
5346 sym->value = gfc_int_expr (value);
5347 sym->attr.use_assoc = 1;
5348 sym->from_intmod = module;
5349 sym->intmod_sym_id = id;
5353 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5356 use_iso_fortran_env_module (void)
5358 static char mod[] = "iso_fortran_env";
5359 const char *local_name;
5361 gfc_symbol *mod_sym;
5362 gfc_symtree *mod_symtree;
5365 intmod_sym symbol[] = {
5366 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5367 #include "iso-fortran-env.def"
5369 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5372 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5373 #include "iso-fortran-env.def"
5376 /* Generate the symbol for the module itself. */
5377 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5378 if (mod_symtree == NULL)
5380 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5381 gcc_assert (mod_symtree);
5382 mod_sym = mod_symtree->n.sym;
5384 mod_sym->attr.flavor = FL_MODULE;
5385 mod_sym->attr.intrinsic = 1;
5386 mod_sym->module = gfc_get_string (mod);
5387 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5390 if (!mod_symtree->n.sym->attr.intrinsic)
5391 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5392 "non-intrinsic module name used previously", mod);
5394 /* Generate the symbols for the module integer named constants. */
5396 for (u = gfc_rename_list; u; u = u->next)
5398 for (i = 0; symbol[i].name; i++)
5399 if (strcmp (symbol[i].name, u->use_name) == 0)
5402 if (symbol[i].name == NULL)
5404 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5405 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
5410 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5411 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5412 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5413 "from intrinsic module ISO_FORTRAN_ENV at %L is "
5414 "incompatible with option %s", &u->where,
5415 gfc_option.flag_default_integer
5416 ? "-fdefault-integer-8" : "-fdefault-real-8");
5418 if (gfc_notify_std (symbol[i].standard, "The symbol '%s', referrenced "
5419 "at %C, is not in the selected standard",
5420 symbol[i].name) == FAILURE)
5423 create_int_parameter (u->local_name[0] ? u->local_name
5425 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5430 for (i = 0; symbol[i].name; i++)
5434 for (u = gfc_rename_list; u; u = u->next)
5436 if (strcmp (symbol[i].name, u->use_name) == 0)
5438 local_name = u->local_name;
5444 if (u && gfc_notify_std (symbol[i].standard, "The symbol '%s', "
5445 "referrenced at %C, is not in the selected "
5446 "standard", symbol[i].name) == FAILURE)
5448 else if ((gfc_option.allow_std & symbol[i].standard) == 0)
5451 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5452 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5453 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5454 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5455 "incompatible with option %s",
5456 gfc_option.flag_default_integer
5457 ? "-fdefault-integer-8" : "-fdefault-real-8");
5459 create_int_parameter (local_name ? local_name : symbol[i].name,
5460 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5464 for (u = gfc_rename_list; u; u = u->next)
5469 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5470 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5476 /* Process a USE directive. */
5479 gfc_use_module (void)
5484 gfc_symtree *mod_symtree;
5485 gfc_use_list *use_stmt;
5487 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5489 strcpy (filename, module_name);
5490 strcat (filename, MODULE_EXTENSION);
5492 /* First, try to find an non-intrinsic module, unless the USE statement
5493 specified that the module is intrinsic. */
5496 module_fp = gfc_open_included_file (filename, true, true);
5498 /* Then, see if it's an intrinsic one, unless the USE statement
5499 specified that the module is non-intrinsic. */
5500 if (module_fp == NULL && !specified_nonint)
5502 if (strcmp (module_name, "iso_fortran_env") == 0
5503 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5504 "intrinsic module at %C") != FAILURE)
5506 use_iso_fortran_env_module ();
5510 if (strcmp (module_name, "iso_c_binding") == 0
5511 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5512 "ISO_C_BINDING module at %C") != FAILURE)
5514 import_iso_c_binding_module();
5518 module_fp = gfc_open_intrinsic_module (filename);
5520 if (module_fp == NULL && specified_int)
5521 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5525 if (module_fp == NULL)
5526 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5527 filename, strerror (errno));
5529 /* Check that we haven't already USEd an intrinsic module with the
5532 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5533 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5534 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5535 "intrinsic module name used previously", module_name);
5542 /* Skip the first two lines of the module, after checking that this is
5543 a gfortran module file. */
5549 bad_module ("Unexpected end of module");
5552 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5553 || (start == 2 && strcmp (atom_name, " module") != 0))
5554 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5558 if (strcmp (atom_name, " version") != 0
5559 || module_char () != ' '
5560 || parse_atom () != ATOM_STRING)
5561 gfc_fatal_error ("Parse error when checking module version"
5562 " for file '%s' opened at %C", filename);
5564 if (strcmp (atom_string, MOD_VERSION))
5566 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5567 "for file '%s' opened at %C", atom_string,
5568 MOD_VERSION, filename);
5576 /* Make sure we're not reading the same module that we may be building. */
5577 for (p = gfc_state_stack; p; p = p->previous)
5578 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5579 gfc_fatal_error ("Can't USE the same module we're building!");
5582 init_true_name_tree ();
5586 free_true_name (true_name_root);
5587 true_name_root = NULL;
5589 free_pi_tree (pi_root);
5594 use_stmt = gfc_get_use_list ();
5595 use_stmt->module_name = gfc_get_string (module_name);
5596 use_stmt->only_flag = only_flag;
5597 use_stmt->rename = gfc_rename_list;
5598 use_stmt->where = use_locus;
5599 gfc_rename_list = NULL;
5600 use_stmt->next = gfc_current_ns->use_stmts;
5601 gfc_current_ns->use_stmts = use_stmt;
5606 gfc_free_use_stmts (gfc_use_list *use_stmts)
5609 for (; use_stmts; use_stmts = next)
5611 gfc_use_rename *next_rename;
5613 for (; use_stmts->rename; use_stmts->rename = next_rename)
5615 next_rename = use_stmts->rename->next;
5616 gfc_free (use_stmts->rename);
5618 next = use_stmts->next;
5619 gfc_free (use_stmts);
5625 gfc_module_init_2 (void)
5627 last_atom = ATOM_LPAREN;
5632 gfc_module_done_2 (void)