1 /* Handle modules, which amounts to loading and saving symbols and
2 their attendant structures.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Andy Vaught
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
23 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
24 sequence of atoms, which can be left or right parenthesis, names,
25 integers or strings. Parenthesis are always matched which allows
26 us to skip over sections at high speed without having to know
27 anything about the internal structure of the lists. A "name" is
28 usually a fortran 95 identifier, but can also start with '@' in
29 order to reference a hidden symbol.
31 The first line of a module is an informational message about what
32 created the module, the file it came from and when it was created.
33 The second line is a warning for people not to edit the module.
34 The rest of the module looks like:
36 ( ( <Interface info for UPLUS> )
37 ( <Interface info for UMINUS> )
40 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
43 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
46 ( ( <common name> <symbol> <saved flag>)
52 ( <Symbol Number (in no particular order)>
54 <Module name of symbol>
55 ( <symbol information> )
64 In general, symbols refer to other symbols by their symbol number,
65 which are zero based. Symbols are written to the module in no
73 #include "parse.h" /* FIXME */
76 #define MODULE_EXTENSION ".mod"
78 /* Don't put any single quote (') in MOD_VERSION,
79 if yout want it to be recognized. */
80 #define MOD_VERSION "4"
83 /* Structure that describes a position within a module file. */
92 /* Structure for list of symbols of intrinsic modules. */
105 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
109 /* The fixup structure lists pointers to pointers that have to
110 be updated when a pointer value becomes known. */
112 typedef struct fixup_t
115 struct fixup_t *next;
120 /* Structure for holding extra info needed for pointers being read. */
136 typedef struct pointer_info
138 BBT_HEADER (pointer_info);
142 /* The first component of each member of the union is the pointer
149 void *pointer; /* Member for doing pointer searches. */
154 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
155 enum gfc_rsym_state state;
156 int ns, referenced, renamed;
159 gfc_symtree *symtree;
160 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
167 enum gfc_wsym_state state;
176 #define gfc_get_pointer_info() XCNEW (pointer_info)
179 /* Local variables */
181 /* The FILE for the module we're reading or writing. */
182 static FILE *module_fp;
184 /* MD5 context structure. */
185 static struct md5_ctx ctx;
187 /* The name of the module we're reading (USE'ing) or writing. */
188 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
190 /* The way the module we're reading was specified. */
191 static bool specified_nonint, specified_int;
193 static int module_line, module_column, only_flag;
195 { IO_INPUT, IO_OUTPUT }
198 static gfc_use_rename *gfc_rename_list;
199 static pointer_info *pi_root;
200 static int symbol_number; /* Counter for assigning symbol numbers */
202 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
203 static bool in_load_equiv;
205 static locus use_locus;
209 /*****************************************************************/
211 /* Pointer/integer conversion. Pointers between structures are stored
212 as integers in the module file. The next couple of subroutines
213 handle this translation for reading and writing. */
215 /* Recursively free the tree of pointer structures. */
218 free_pi_tree (pointer_info *p)
223 if (p->fixup != NULL)
224 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
226 free_pi_tree (p->left);
227 free_pi_tree (p->right);
233 /* Compare pointers when searching by pointer. Used when writing a
237 compare_pointers (void *_sn1, void *_sn2)
239 pointer_info *sn1, *sn2;
241 sn1 = (pointer_info *) _sn1;
242 sn2 = (pointer_info *) _sn2;
244 if (sn1->u.pointer < sn2->u.pointer)
246 if (sn1->u.pointer > sn2->u.pointer)
253 /* Compare integers when searching by integer. Used when reading a
257 compare_integers (void *_sn1, void *_sn2)
259 pointer_info *sn1, *sn2;
261 sn1 = (pointer_info *) _sn1;
262 sn2 = (pointer_info *) _sn2;
264 if (sn1->integer < sn2->integer)
266 if (sn1->integer > sn2->integer)
273 /* Initialize the pointer_info tree. */
282 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
284 /* Pointer 0 is the NULL pointer. */
285 p = gfc_get_pointer_info ();
290 gfc_insert_bbt (&pi_root, p, compare);
292 /* Pointer 1 is the current namespace. */
293 p = gfc_get_pointer_info ();
294 p->u.pointer = gfc_current_ns;
296 p->type = P_NAMESPACE;
298 gfc_insert_bbt (&pi_root, p, compare);
304 /* During module writing, call here with a pointer to something,
305 returning the pointer_info node. */
307 static pointer_info *
308 find_pointer (void *gp)
315 if (p->u.pointer == gp)
317 p = (gp < p->u.pointer) ? p->left : p->right;
324 /* Given a pointer while writing, returns the pointer_info tree node,
325 creating it if it doesn't exist. */
327 static pointer_info *
328 get_pointer (void *gp)
332 p = find_pointer (gp);
336 /* Pointer doesn't have an integer. Give it one. */
337 p = gfc_get_pointer_info ();
340 p->integer = symbol_number++;
342 gfc_insert_bbt (&pi_root, p, compare_pointers);
348 /* Given an integer during reading, find it in the pointer_info tree,
349 creating the node if not found. */
351 static pointer_info *
352 get_integer (int integer)
362 c = compare_integers (&t, p);
366 p = (c < 0) ? p->left : p->right;
372 p = gfc_get_pointer_info ();
373 p->integer = integer;
376 gfc_insert_bbt (&pi_root, p, compare_integers);
382 /* Recursive function to find a pointer within a tree by brute force. */
384 static pointer_info *
385 fp2 (pointer_info *p, const void *target)
392 if (p->u.pointer == target)
395 q = fp2 (p->left, target);
399 return fp2 (p->right, target);
403 /* During reading, find a pointer_info node from the pointer value.
404 This amounts to a brute-force search. */
406 static pointer_info *
407 find_pointer2 (void *p)
409 return fp2 (pi_root, p);
413 /* Resolve any fixups using a known pointer. */
416 resolve_fixups (fixup_t *f, void *gp)
429 /* Call here during module reading when we know what pointer to
430 associate with an integer. Any fixups that exist are resolved at
434 associate_integer_pointer (pointer_info *p, void *gp)
436 if (p->u.pointer != NULL)
437 gfc_internal_error ("associate_integer_pointer(): Already associated");
441 resolve_fixups (p->fixup, gp);
447 /* During module reading, given an integer and a pointer to a pointer,
448 either store the pointer from an already-known value or create a
449 fixup structure in order to store things later. Returns zero if
450 the reference has been actually stored, or nonzero if the reference
451 must be fixed later (i.e., associate_integer_pointer must be called
452 sometime later. Returns the pointer_info structure. */
454 static pointer_info *
455 add_fixup (int integer, void *gp)
461 p = get_integer (integer);
463 if (p->integer == 0 || p->u.pointer != NULL)
466 *cp = (char *) p->u.pointer;
475 f->pointer = (void **) gp;
482 /*****************************************************************/
484 /* Parser related subroutines */
486 /* Free the rename list left behind by a USE statement. */
491 gfc_use_rename *next;
493 for (; gfc_rename_list; gfc_rename_list = next)
495 next = gfc_rename_list->next;
496 gfc_free (gfc_rename_list);
501 /* Match a USE statement. */
506 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
507 gfc_use_rename *tail = NULL, *new_use;
508 interface_type type, type2;
512 specified_int = false;
513 specified_nonint = false;
515 if (gfc_match (" , ") == MATCH_YES)
517 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
519 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
520 "nature in USE statement at %C") == FAILURE)
523 if (strcmp (module_nature, "intrinsic") == 0)
524 specified_int = true;
527 if (strcmp (module_nature, "non_intrinsic") == 0)
528 specified_nonint = true;
531 gfc_error ("Module nature in USE statement at %C shall "
532 "be either INTRINSIC or NON_INTRINSIC");
539 /* Help output a better error message than "Unclassifiable
541 gfc_match (" %n", module_nature);
542 if (strcmp (module_nature, "intrinsic") == 0
543 || strcmp (module_nature, "non_intrinsic") == 0)
544 gfc_error ("\"::\" was expected after module nature at %C "
545 "but was not found");
551 m = gfc_match (" ::");
552 if (m == MATCH_YES &&
553 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
554 "\"USE :: module\" at %C") == FAILURE)
559 m = gfc_match ("% ");
565 use_locus = gfc_current_locus;
567 m = gfc_match_name (module_name);
574 if (gfc_match_eos () == MATCH_YES)
576 if (gfc_match_char (',') != MATCH_YES)
579 if (gfc_match (" only :") == MATCH_YES)
582 if (gfc_match_eos () == MATCH_YES)
587 /* Get a new rename struct and add it to the rename list. */
588 new_use = gfc_get_use_rename ();
589 new_use->where = gfc_current_locus;
592 if (gfc_rename_list == NULL)
593 gfc_rename_list = new_use;
595 tail->next = new_use;
598 /* See what kind of interface we're dealing with. Assume it is
600 new_use->op = INTRINSIC_NONE;
601 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
606 case INTERFACE_NAMELESS:
607 gfc_error ("Missing generic specification in USE statement at %C");
610 case INTERFACE_USER_OP:
611 case INTERFACE_GENERIC:
612 m = gfc_match (" =>");
614 if (type == INTERFACE_USER_OP && m == MATCH_YES
615 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
616 "operators in USE statements at %C")
620 if (type == INTERFACE_USER_OP)
621 new_use->op = INTRINSIC_USER;
626 strcpy (new_use->use_name, name);
629 strcpy (new_use->local_name, name);
630 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
635 if (m == MATCH_ERROR)
643 strcpy (new_use->local_name, name);
645 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
650 if (m == MATCH_ERROR)
654 if (strcmp (new_use->use_name, module_name) == 0
655 || strcmp (new_use->local_name, module_name) == 0)
657 gfc_error ("The name '%s' at %C has already been used as "
658 "an external module name.", module_name);
663 case INTERFACE_INTRINSIC_OP:
671 if (gfc_match_eos () == MATCH_YES)
673 if (gfc_match_char (',') != MATCH_YES)
680 gfc_syntax_error (ST_USE);
688 /* Given a name and a number, inst, return the inst name
689 under which to load this symbol. Returns NULL if this
690 symbol shouldn't be loaded. If inst is zero, returns
691 the number of instances of this name. If interface is
692 true, a user-defined operator is sought, otherwise only
693 non-operators are sought. */
696 find_use_name_n (const char *name, int *inst, bool interface)
702 for (u = gfc_rename_list; u; u = u->next)
704 if (strcmp (u->use_name, name) != 0
705 || (u->op == INTRINSIC_USER && !interface)
706 || (u->op != INTRINSIC_USER && interface))
719 return only_flag ? NULL : name;
723 return (u->local_name[0] != '\0') ? u->local_name : name;
727 /* Given a name, return the name under which to load this symbol.
728 Returns NULL if this symbol shouldn't be loaded. */
731 find_use_name (const char *name, bool interface)
734 return find_use_name_n (name, &i, interface);
738 /* Given a real name, return the number of use names associated with it. */
741 number_use_names (const char *name, bool interface)
744 find_use_name_n (name, &i, interface);
749 /* Try to find the operator in the current list. */
751 static gfc_use_rename *
752 find_use_operator (gfc_intrinsic_op op)
756 for (u = gfc_rename_list; u; u = u->next)
764 /*****************************************************************/
766 /* The next couple of subroutines maintain a tree used to avoid a
767 brute-force search for a combination of true name and module name.
768 While symtree names, the name that a particular symbol is known by
769 can changed with USE statements, we still have to keep track of the
770 true names to generate the correct reference, and also avoid
771 loading the same real symbol twice in a program unit.
773 When we start reading, the true name tree is built and maintained
774 as symbols are read. The tree is searched as we load new symbols
775 to see if it already exists someplace in the namespace. */
777 typedef struct true_name
779 BBT_HEADER (true_name);
784 static true_name *true_name_root;
787 /* Compare two true_name structures. */
790 compare_true_names (void *_t1, void *_t2)
795 t1 = (true_name *) _t1;
796 t2 = (true_name *) _t2;
798 c = ((t1->sym->module > t2->sym->module)
799 - (t1->sym->module < t2->sym->module));
803 return strcmp (t1->sym->name, t2->sym->name);
807 /* Given a true name, search the true name tree to see if it exists
808 within the main namespace. */
811 find_true_name (const char *name, const char *module)
817 sym.name = gfc_get_string (name);
819 sym.module = gfc_get_string (module);
827 c = compare_true_names ((void *) (&t), (void *) p);
831 p = (c < 0) ? p->left : p->right;
838 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
841 add_true_name (gfc_symbol *sym)
845 t = XCNEW (true_name);
848 gfc_insert_bbt (&true_name_root, t, compare_true_names);
852 /* Recursive function to build the initial true name tree by
853 recursively traversing the current namespace. */
856 build_tnt (gfc_symtree *st)
861 build_tnt (st->left);
862 build_tnt (st->right);
864 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
867 add_true_name (st->n.sym);
871 /* Initialize the true name tree with the current namespace. */
874 init_true_name_tree (void)
876 true_name_root = NULL;
877 build_tnt (gfc_current_ns->sym_root);
881 /* Recursively free a true name tree node. */
884 free_true_name (true_name *t)
888 free_true_name (t->left);
889 free_true_name (t->right);
895 /*****************************************************************/
897 /* Module reading and writing. */
901 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
905 static atom_type last_atom;
908 /* The name buffer must be at least as long as a symbol name. Right
909 now it's not clear how we're going to store numeric constants--
910 probably as a hexadecimal string, since this will allow the exact
911 number to be preserved (this can't be done by a decimal
912 representation). Worry about that later. TODO! */
914 #define MAX_ATOM_SIZE 100
917 static char *atom_string, atom_name[MAX_ATOM_SIZE];
920 /* Report problems with a module. Error reporting is not very
921 elaborate, since this sorts of errors shouldn't really happen.
922 This subroutine never returns. */
924 static void bad_module (const char *) ATTRIBUTE_NORETURN;
927 bad_module (const char *msgid)
934 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
935 module_name, module_line, module_column, msgid);
938 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
939 module_name, module_line, module_column, msgid);
942 gfc_fatal_error ("Module %s at line %d column %d: %s",
943 module_name, module_line, module_column, msgid);
949 /* Set the module's input pointer. */
952 set_module_locus (module_locus *m)
954 module_column = m->column;
955 module_line = m->line;
956 fsetpos (module_fp, &m->pos);
960 /* Get the module's input pointer so that we can restore it later. */
963 get_module_locus (module_locus *m)
965 m->column = module_column;
966 m->line = module_line;
967 fgetpos (module_fp, &m->pos);
971 /* Get the next character in the module, updating our reckoning of
979 c = getc (module_fp);
982 bad_module ("Unexpected EOF");
995 /* Parse a string constant. The delimiter is guaranteed to be a
1005 get_module_locus (&start);
1009 /* See how long the string is. */
1014 bad_module ("Unexpected end of module in string constant");
1032 set_module_locus (&start);
1034 atom_string = p = XCNEWVEC (char, len + 1);
1036 for (; len > 0; len--)
1040 module_char (); /* Guaranteed to be another \'. */
1044 module_char (); /* Terminating \'. */
1045 *p = '\0'; /* C-style string for debug purposes. */
1049 /* Parse a small integer. */
1052 parse_integer (int c)
1060 get_module_locus (&m);
1066 atom_int = 10 * atom_int + c - '0';
1067 if (atom_int > 99999999)
1068 bad_module ("Integer overflow");
1071 set_module_locus (&m);
1089 get_module_locus (&m);
1094 if (!ISALNUM (c) && c != '_' && c != '-')
1098 if (++len > GFC_MAX_SYMBOL_LEN)
1099 bad_module ("Name too long");
1104 fseek (module_fp, -1, SEEK_CUR);
1105 module_column = m.column + len - 1;
1112 /* Read the next atom in the module's input stream. */
1123 while (c == ' ' || c == '\r' || c == '\n');
1148 return ATOM_INTEGER;
1206 bad_module ("Bad name");
1213 /* Peek at the next atom on the input. */
1221 get_module_locus (&m);
1224 if (a == ATOM_STRING)
1225 gfc_free (atom_string);
1227 set_module_locus (&m);
1232 /* Read the next atom from the input, requiring that it be a
1236 require_atom (atom_type type)
1242 get_module_locus (&m);
1250 p = _("Expected name");
1253 p = _("Expected left parenthesis");
1256 p = _("Expected right parenthesis");
1259 p = _("Expected integer");
1262 p = _("Expected string");
1265 gfc_internal_error ("require_atom(): bad atom type required");
1268 set_module_locus (&m);
1274 /* Given a pointer to an mstring array, require that the current input
1275 be one of the strings in the array. We return the enum value. */
1278 find_enum (const mstring *m)
1282 i = gfc_string2code (m, atom_name);
1286 bad_module ("find_enum(): Enum not found");
1292 /**************** Module output subroutines ***************************/
1294 /* Output a character to a module file. */
1297 write_char (char out)
1299 if (putc (out, module_fp) == EOF)
1300 gfc_fatal_error ("Error writing modules file: %s", strerror (errno));
1302 /* Add this to our MD5. */
1303 md5_process_bytes (&out, sizeof (out), &ctx);
1315 /* Write an atom to a module. The line wrapping isn't perfect, but it
1316 should work most of the time. This isn't that big of a deal, since
1317 the file really isn't meant to be read by people anyway. */
1320 write_atom (atom_type atom, const void *v)
1330 p = (const char *) v;
1342 i = *((const int *) v);
1344 gfc_internal_error ("write_atom(): Writing negative integer");
1346 sprintf (buffer, "%d", i);
1351 gfc_internal_error ("write_atom(): Trying to write dab atom");
1355 if(p == NULL || *p == '\0')
1360 if (atom != ATOM_RPAREN)
1362 if (module_column + len > 72)
1367 if (last_atom != ATOM_LPAREN && module_column != 1)
1372 if (atom == ATOM_STRING)
1375 while (p != NULL && *p)
1377 if (atom == ATOM_STRING && *p == '\'')
1382 if (atom == ATOM_STRING)
1390 /***************** Mid-level I/O subroutines *****************/
1392 /* These subroutines let their caller read or write atoms without
1393 caring about which of the two is actually happening. This lets a
1394 subroutine concentrate on the actual format of the data being
1397 static void mio_expr (gfc_expr **);
1398 pointer_info *mio_symbol_ref (gfc_symbol **);
1399 pointer_info *mio_interface_rest (gfc_interface **);
1400 static void mio_symtree_ref (gfc_symtree **);
1402 /* Read or write an enumerated value. On writing, we return the input
1403 value for the convenience of callers. We avoid using an integer
1404 pointer because enums are sometimes inside bitfields. */
1407 mio_name (int t, const mstring *m)
1409 if (iomode == IO_OUTPUT)
1410 write_atom (ATOM_NAME, gfc_code2string (m, t));
1413 require_atom (ATOM_NAME);
1420 /* Specialization of mio_name. */
1422 #define DECL_MIO_NAME(TYPE) \
1423 static inline TYPE \
1424 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1426 return (TYPE) mio_name ((int) t, m); \
1428 #define MIO_NAME(TYPE) mio_name_##TYPE
1433 if (iomode == IO_OUTPUT)
1434 write_atom (ATOM_LPAREN, NULL);
1436 require_atom (ATOM_LPAREN);
1443 if (iomode == IO_OUTPUT)
1444 write_atom (ATOM_RPAREN, NULL);
1446 require_atom (ATOM_RPAREN);
1451 mio_integer (int *ip)
1453 if (iomode == IO_OUTPUT)
1454 write_atom (ATOM_INTEGER, ip);
1457 require_atom (ATOM_INTEGER);
1463 /* Read or write a gfc_intrinsic_op value. */
1466 mio_intrinsic_op (gfc_intrinsic_op* op)
1468 /* FIXME: Would be nicer to do this via the operators symbolic name. */
1469 if (iomode == IO_OUTPUT)
1471 int converted = (int) *op;
1472 write_atom (ATOM_INTEGER, &converted);
1476 require_atom (ATOM_INTEGER);
1477 *op = (gfc_intrinsic_op) atom_int;
1482 /* Read or write a character pointer that points to a string on the heap. */
1485 mio_allocated_string (const char *s)
1487 if (iomode == IO_OUTPUT)
1489 write_atom (ATOM_STRING, s);
1494 require_atom (ATOM_STRING);
1500 /* Functions for quoting and unquoting strings. */
1503 quote_string (const gfc_char_t *s, const size_t slength)
1505 const gfc_char_t *p;
1509 /* Calculate the length we'll need: a backslash takes two ("\\"),
1510 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1511 for (p = s, i = 0; i < slength; p++, i++)
1515 else if (!gfc_wide_is_printable (*p))
1521 q = res = XCNEWVEC (char, len + 1);
1522 for (p = s, i = 0; i < slength; p++, i++)
1525 *q++ = '\\', *q++ = '\\';
1526 else if (!gfc_wide_is_printable (*p))
1528 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1529 (unsigned HOST_WIDE_INT) *p);
1533 *q++ = (unsigned char) *p;
1541 unquote_string (const char *s)
1547 for (p = s, len = 0; *p; p++, len++)
1554 else if (p[1] == 'U')
1555 p += 9; /* That is a "\U????????". */
1557 gfc_internal_error ("unquote_string(): got bad string");
1560 res = gfc_get_wide_string (len + 1);
1561 for (i = 0, p = s; i < len; i++, p++)
1566 res[i] = (unsigned char) *p;
1567 else if (p[1] == '\\')
1569 res[i] = (unsigned char) '\\';
1574 /* We read the 8-digits hexadecimal constant that follows. */
1579 gcc_assert (p[1] == 'U');
1580 for (j = 0; j < 8; j++)
1583 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1597 /* Read or write a character pointer that points to a wide string on the
1598 heap, performing quoting/unquoting of nonprintable characters using the
1599 form \U???????? (where each ? is a hexadecimal digit).
1600 Length is the length of the string, only known and used in output mode. */
1602 static const gfc_char_t *
1603 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1605 if (iomode == IO_OUTPUT)
1607 char *quoted = quote_string (s, length);
1608 write_atom (ATOM_STRING, quoted);
1614 gfc_char_t *unquoted;
1616 require_atom (ATOM_STRING);
1617 unquoted = unquote_string (atom_string);
1618 gfc_free (atom_string);
1624 /* Read or write a string that is in static memory. */
1627 mio_pool_string (const char **stringp)
1629 /* TODO: one could write the string only once, and refer to it via a
1632 /* As a special case we have to deal with a NULL string. This
1633 happens for the 'module' member of 'gfc_symbol's that are not in a
1634 module. We read / write these as the empty string. */
1635 if (iomode == IO_OUTPUT)
1637 const char *p = *stringp == NULL ? "" : *stringp;
1638 write_atom (ATOM_STRING, p);
1642 require_atom (ATOM_STRING);
1643 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1644 gfc_free (atom_string);
1649 /* Read or write a string that is inside of some already-allocated
1653 mio_internal_string (char *string)
1655 if (iomode == IO_OUTPUT)
1656 write_atom (ATOM_STRING, string);
1659 require_atom (ATOM_STRING);
1660 strcpy (string, atom_string);
1661 gfc_free (atom_string);
1667 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1668 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1669 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1670 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1671 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE, AB_ALLOC_COMP,
1672 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1673 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1674 AB_IS_CLASS, AB_PROCEDURE, AB_PROC_POINTER
1678 static const mstring attr_bits[] =
1680 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1681 minit ("DIMENSION", AB_DIMENSION),
1682 minit ("EXTERNAL", AB_EXTERNAL),
1683 minit ("INTRINSIC", AB_INTRINSIC),
1684 minit ("OPTIONAL", AB_OPTIONAL),
1685 minit ("POINTER", AB_POINTER),
1686 minit ("VOLATILE", AB_VOLATILE),
1687 minit ("TARGET", AB_TARGET),
1688 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1689 minit ("DUMMY", AB_DUMMY),
1690 minit ("RESULT", AB_RESULT),
1691 minit ("DATA", AB_DATA),
1692 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1693 minit ("IN_COMMON", AB_IN_COMMON),
1694 minit ("FUNCTION", AB_FUNCTION),
1695 minit ("SUBROUTINE", AB_SUBROUTINE),
1696 minit ("SEQUENCE", AB_SEQUENCE),
1697 minit ("ELEMENTAL", AB_ELEMENTAL),
1698 minit ("PURE", AB_PURE),
1699 minit ("RECURSIVE", AB_RECURSIVE),
1700 minit ("GENERIC", AB_GENERIC),
1701 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1702 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1703 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1704 minit ("IS_BIND_C", AB_IS_BIND_C),
1705 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1706 minit ("IS_ISO_C", AB_IS_ISO_C),
1707 minit ("VALUE", AB_VALUE),
1708 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1709 minit ("POINTER_COMP", AB_POINTER_COMP),
1710 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1711 minit ("ZERO_COMP", AB_ZERO_COMP),
1712 minit ("PROTECTED", AB_PROTECTED),
1713 minit ("ABSTRACT", AB_ABSTRACT),
1714 minit ("IS_CLASS", AB_IS_CLASS),
1715 minit ("PROCEDURE", AB_PROCEDURE),
1716 minit ("PROC_POINTER", AB_PROC_POINTER),
1720 /* For binding attributes. */
1721 static const mstring binding_passing[] =
1724 minit ("NOPASS", 1),
1727 static const mstring binding_overriding[] =
1729 minit ("OVERRIDABLE", 0),
1730 minit ("NON_OVERRIDABLE", 1),
1731 minit ("DEFERRED", 2),
1734 static const mstring binding_generic[] =
1736 minit ("SPECIFIC", 0),
1737 minit ("GENERIC", 1),
1740 static const mstring binding_ppc[] =
1742 minit ("NO_PPC", 0),
1747 /* Specialization of mio_name. */
1748 DECL_MIO_NAME (ab_attribute)
1749 DECL_MIO_NAME (ar_type)
1750 DECL_MIO_NAME (array_type)
1752 DECL_MIO_NAME (expr_t)
1753 DECL_MIO_NAME (gfc_access)
1754 DECL_MIO_NAME (gfc_intrinsic_op)
1755 DECL_MIO_NAME (ifsrc)
1756 DECL_MIO_NAME (save_state)
1757 DECL_MIO_NAME (procedure_type)
1758 DECL_MIO_NAME (ref_type)
1759 DECL_MIO_NAME (sym_flavor)
1760 DECL_MIO_NAME (sym_intent)
1761 #undef DECL_MIO_NAME
1763 /* Symbol attributes are stored in list with the first three elements
1764 being the enumerated fields, while the remaining elements (if any)
1765 indicate the individual attribute bits. The access field is not
1766 saved-- it controls what symbols are exported when a module is
1770 mio_symbol_attribute (symbol_attribute *attr)
1773 unsigned ext_attr,extension_level;
1777 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1778 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1779 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1780 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1781 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1783 ext_attr = attr->ext_attr;
1784 mio_integer ((int *) &ext_attr);
1785 attr->ext_attr = ext_attr;
1787 extension_level = attr->extension;
1788 mio_integer ((int *) &extension_level);
1789 attr->extension = extension_level;
1791 if (iomode == IO_OUTPUT)
1793 if (attr->allocatable)
1794 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1795 if (attr->dimension)
1796 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1798 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1799 if (attr->intrinsic)
1800 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1802 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1804 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1805 if (attr->is_protected)
1806 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1808 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1809 if (attr->volatile_)
1810 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1812 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1813 if (attr->threadprivate)
1814 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1816 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1818 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1819 /* We deliberately don't preserve the "entry" flag. */
1822 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1823 if (attr->in_namelist)
1824 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1825 if (attr->in_common)
1826 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1829 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1830 if (attr->subroutine)
1831 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1833 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1835 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1838 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1839 if (attr->elemental)
1840 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1842 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1843 if (attr->recursive)
1844 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1845 if (attr->always_explicit)
1846 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1847 if (attr->cray_pointer)
1848 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1849 if (attr->cray_pointee)
1850 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1851 if (attr->is_bind_c)
1852 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1853 if (attr->is_c_interop)
1854 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1856 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1857 if (attr->alloc_comp)
1858 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1859 if (attr->pointer_comp)
1860 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1861 if (attr->private_comp)
1862 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1863 if (attr->zero_comp)
1864 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1866 MIO_NAME (ab_attribute) (AB_IS_CLASS, attr_bits);
1867 if (attr->procedure)
1868 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1869 if (attr->proc_pointer)
1870 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1880 if (t == ATOM_RPAREN)
1883 bad_module ("Expected attribute bit name");
1885 switch ((ab_attribute) find_enum (attr_bits))
1887 case AB_ALLOCATABLE:
1888 attr->allocatable = 1;
1891 attr->dimension = 1;
1897 attr->intrinsic = 1;
1906 attr->is_protected = 1;
1912 attr->volatile_ = 1;
1917 case AB_THREADPRIVATE:
1918 attr->threadprivate = 1;
1929 case AB_IN_NAMELIST:
1930 attr->in_namelist = 1;
1933 attr->in_common = 1;
1939 attr->subroutine = 1;
1951 attr->elemental = 1;
1957 attr->recursive = 1;
1959 case AB_ALWAYS_EXPLICIT:
1960 attr->always_explicit = 1;
1962 case AB_CRAY_POINTER:
1963 attr->cray_pointer = 1;
1965 case AB_CRAY_POINTEE:
1966 attr->cray_pointee = 1;
1969 attr->is_bind_c = 1;
1971 case AB_IS_C_INTEROP:
1972 attr->is_c_interop = 1;
1978 attr->alloc_comp = 1;
1980 case AB_POINTER_COMP:
1981 attr->pointer_comp = 1;
1983 case AB_PRIVATE_COMP:
1984 attr->private_comp = 1;
1987 attr->zero_comp = 1;
1993 attr->procedure = 1;
1995 case AB_PROC_POINTER:
1996 attr->proc_pointer = 1;
2004 static const mstring bt_types[] = {
2005 minit ("INTEGER", BT_INTEGER),
2006 minit ("REAL", BT_REAL),
2007 minit ("COMPLEX", BT_COMPLEX),
2008 minit ("LOGICAL", BT_LOGICAL),
2009 minit ("CHARACTER", BT_CHARACTER),
2010 minit ("DERIVED", BT_DERIVED),
2011 minit ("CLASS", BT_CLASS),
2012 minit ("PROCEDURE", BT_PROCEDURE),
2013 minit ("UNKNOWN", BT_UNKNOWN),
2014 minit ("VOID", BT_VOID),
2020 mio_charlen (gfc_charlen **clp)
2026 if (iomode == IO_OUTPUT)
2030 mio_expr (&cl->length);
2034 if (peek_atom () != ATOM_RPAREN)
2036 cl = gfc_new_charlen (gfc_current_ns, NULL);
2037 mio_expr (&cl->length);
2046 /* See if a name is a generated name. */
2049 check_unique_name (const char *name)
2051 return *name == '@';
2056 mio_typespec (gfc_typespec *ts)
2060 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2062 if (ts->type != BT_DERIVED && ts->type != BT_CLASS)
2063 mio_integer (&ts->kind);
2065 mio_symbol_ref (&ts->u.derived);
2067 /* Add info for C interop and is_iso_c. */
2068 mio_integer (&ts->is_c_interop);
2069 mio_integer (&ts->is_iso_c);
2071 /* If the typespec is for an identifier either from iso_c_binding, or
2072 a constant that was initialized to an identifier from it, use the
2073 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2075 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2077 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2079 if (ts->type != BT_CHARACTER)
2081 /* ts->u.cl is only valid for BT_CHARACTER. */
2086 mio_charlen (&ts->u.cl);
2092 static const mstring array_spec_types[] = {
2093 minit ("EXPLICIT", AS_EXPLICIT),
2094 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2095 minit ("DEFERRED", AS_DEFERRED),
2096 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2102 mio_array_spec (gfc_array_spec **asp)
2109 if (iomode == IO_OUTPUT)
2117 if (peek_atom () == ATOM_RPAREN)
2123 *asp = as = gfc_get_array_spec ();
2126 mio_integer (&as->rank);
2127 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2129 for (i = 0; i < as->rank; i++)
2131 mio_expr (&as->lower[i]);
2132 mio_expr (&as->upper[i]);
2140 /* Given a pointer to an array reference structure (which lives in a
2141 gfc_ref structure), find the corresponding array specification
2142 structure. Storing the pointer in the ref structure doesn't quite
2143 work when loading from a module. Generating code for an array
2144 reference also needs more information than just the array spec. */
2146 static const mstring array_ref_types[] = {
2147 minit ("FULL", AR_FULL),
2148 minit ("ELEMENT", AR_ELEMENT),
2149 minit ("SECTION", AR_SECTION),
2155 mio_array_ref (gfc_array_ref *ar)
2160 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2161 mio_integer (&ar->dimen);
2169 for (i = 0; i < ar->dimen; i++)
2170 mio_expr (&ar->start[i]);
2175 for (i = 0; i < ar->dimen; i++)
2177 mio_expr (&ar->start[i]);
2178 mio_expr (&ar->end[i]);
2179 mio_expr (&ar->stride[i]);
2185 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2188 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2189 we can't call mio_integer directly. Instead loop over each element
2190 and cast it to/from an integer. */
2191 if (iomode == IO_OUTPUT)
2193 for (i = 0; i < ar->dimen; i++)
2195 int tmp = (int)ar->dimen_type[i];
2196 write_atom (ATOM_INTEGER, &tmp);
2201 for (i = 0; i < ar->dimen; i++)
2203 require_atom (ATOM_INTEGER);
2204 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2208 if (iomode == IO_INPUT)
2210 ar->where = gfc_current_locus;
2212 for (i = 0; i < ar->dimen; i++)
2213 ar->c_where[i] = gfc_current_locus;
2220 /* Saves or restores a pointer. The pointer is converted back and
2221 forth from an integer. We return the pointer_info pointer so that
2222 the caller can take additional action based on the pointer type. */
2224 static pointer_info *
2225 mio_pointer_ref (void *gp)
2229 if (iomode == IO_OUTPUT)
2231 p = get_pointer (*((char **) gp));
2232 write_atom (ATOM_INTEGER, &p->integer);
2236 require_atom (ATOM_INTEGER);
2237 p = add_fixup (atom_int, gp);
2244 /* Save and load references to components that occur within
2245 expressions. We have to describe these references by a number and
2246 by name. The number is necessary for forward references during
2247 reading, and the name is necessary if the symbol already exists in
2248 the namespace and is not loaded again. */
2251 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2253 char name[GFC_MAX_SYMBOL_LEN + 1];
2257 p = mio_pointer_ref (cp);
2258 if (p->type == P_UNKNOWN)
2259 p->type = P_COMPONENT;
2261 if (iomode == IO_OUTPUT)
2262 mio_pool_string (&(*cp)->name);
2265 mio_internal_string (name);
2267 /* It can happen that a component reference can be read before the
2268 associated derived type symbol has been loaded. Return now and
2269 wait for a later iteration of load_needed. */
2273 if (sym->components != NULL && p->u.pointer == NULL)
2275 /* Symbol already loaded, so search by name. */
2276 for (q = sym->components; q; q = q->next)
2277 if (strcmp (q->name, name) == 0)
2281 gfc_internal_error ("mio_component_ref(): Component not found");
2283 associate_integer_pointer (p, q);
2286 /* Make sure this symbol will eventually be loaded. */
2287 p = find_pointer2 (sym);
2288 if (p->u.rsym.state == UNUSED)
2289 p->u.rsym.state = NEEDED;
2294 static void mio_namespace_ref (gfc_namespace **nsp);
2295 static void mio_formal_arglist (gfc_formal_arglist **formal);
2296 static void mio_typebound_proc (gfc_typebound_proc** proc);
2299 mio_component (gfc_component *c)
2303 gfc_formal_arglist *formal;
2307 if (iomode == IO_OUTPUT)
2309 p = get_pointer (c);
2310 mio_integer (&p->integer);
2315 p = get_integer (n);
2316 associate_integer_pointer (p, c);
2319 if (p->type == P_UNKNOWN)
2320 p->type = P_COMPONENT;
2322 mio_pool_string (&c->name);
2323 mio_typespec (&c->ts);
2324 mio_array_spec (&c->as);
2326 mio_symbol_attribute (&c->attr);
2327 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2329 mio_expr (&c->initializer);
2331 if (c->attr.proc_pointer)
2333 if (iomode == IO_OUTPUT)
2336 while (formal && !formal->sym)
2337 formal = formal->next;
2340 mio_namespace_ref (&formal->sym->ns);
2342 mio_namespace_ref (&c->formal_ns);
2346 mio_namespace_ref (&c->formal_ns);
2347 /* TODO: if (c->formal_ns)
2349 c->formal_ns->proc_name = c;
2354 mio_formal_arglist (&c->formal);
2356 mio_typebound_proc (&c->tb);
2364 mio_component_list (gfc_component **cp)
2366 gfc_component *c, *tail;
2370 if (iomode == IO_OUTPUT)
2372 for (c = *cp; c; c = c->next)
2382 if (peek_atom () == ATOM_RPAREN)
2385 c = gfc_get_component ();
2402 mio_actual_arg (gfc_actual_arglist *a)
2405 mio_pool_string (&a->name);
2406 mio_expr (&a->expr);
2412 mio_actual_arglist (gfc_actual_arglist **ap)
2414 gfc_actual_arglist *a, *tail;
2418 if (iomode == IO_OUTPUT)
2420 for (a = *ap; a; a = a->next)
2430 if (peek_atom () != ATOM_LPAREN)
2433 a = gfc_get_actual_arglist ();
2449 /* Read and write formal argument lists. */
2452 mio_formal_arglist (gfc_formal_arglist **formal)
2454 gfc_formal_arglist *f, *tail;
2458 if (iomode == IO_OUTPUT)
2460 for (f = *formal; f; f = f->next)
2461 mio_symbol_ref (&f->sym);
2465 *formal = tail = NULL;
2467 while (peek_atom () != ATOM_RPAREN)
2469 f = gfc_get_formal_arglist ();
2470 mio_symbol_ref (&f->sym);
2472 if (*formal == NULL)
2485 /* Save or restore a reference to a symbol node. */
2488 mio_symbol_ref (gfc_symbol **symp)
2492 p = mio_pointer_ref (symp);
2493 if (p->type == P_UNKNOWN)
2496 if (iomode == IO_OUTPUT)
2498 if (p->u.wsym.state == UNREFERENCED)
2499 p->u.wsym.state = NEEDS_WRITE;
2503 if (p->u.rsym.state == UNUSED)
2504 p->u.rsym.state = NEEDED;
2510 /* Save or restore a reference to a symtree node. */
2513 mio_symtree_ref (gfc_symtree **stp)
2518 if (iomode == IO_OUTPUT)
2519 mio_symbol_ref (&(*stp)->n.sym);
2522 require_atom (ATOM_INTEGER);
2523 p = get_integer (atom_int);
2525 /* An unused equivalence member; make a symbol and a symtree
2527 if (in_load_equiv && p->u.rsym.symtree == NULL)
2529 /* Since this is not used, it must have a unique name. */
2530 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2532 /* Make the symbol. */
2533 if (p->u.rsym.sym == NULL)
2535 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2537 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2540 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2541 p->u.rsym.symtree->n.sym->refs++;
2542 p->u.rsym.referenced = 1;
2544 /* If the symbol is PRIVATE and in COMMON, load_commons will
2545 generate a fixup symbol, which must be associated. */
2547 resolve_fixups (p->fixup, p->u.rsym.sym);
2551 if (p->type == P_UNKNOWN)
2554 if (p->u.rsym.state == UNUSED)
2555 p->u.rsym.state = NEEDED;
2557 if (p->u.rsym.symtree != NULL)
2559 *stp = p->u.rsym.symtree;
2563 f = XCNEW (fixup_t);
2565 f->next = p->u.rsym.stfixup;
2566 p->u.rsym.stfixup = f;
2568 f->pointer = (void **) stp;
2575 mio_iterator (gfc_iterator **ip)
2581 if (iomode == IO_OUTPUT)
2588 if (peek_atom () == ATOM_RPAREN)
2594 *ip = gfc_get_iterator ();
2599 mio_expr (&iter->var);
2600 mio_expr (&iter->start);
2601 mio_expr (&iter->end);
2602 mio_expr (&iter->step);
2610 mio_constructor (gfc_constructor **cp)
2612 gfc_constructor *c, *tail;
2616 if (iomode == IO_OUTPUT)
2618 for (c = *cp; c; c = c->next)
2621 mio_expr (&c->expr);
2622 mio_iterator (&c->iterator);
2631 while (peek_atom () != ATOM_RPAREN)
2633 c = gfc_get_constructor ();
2643 mio_expr (&c->expr);
2644 mio_iterator (&c->iterator);
2653 static const mstring ref_types[] = {
2654 minit ("ARRAY", REF_ARRAY),
2655 minit ("COMPONENT", REF_COMPONENT),
2656 minit ("SUBSTRING", REF_SUBSTRING),
2662 mio_ref (gfc_ref **rp)
2669 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2674 mio_array_ref (&r->u.ar);
2678 mio_symbol_ref (&r->u.c.sym);
2679 mio_component_ref (&r->u.c.component, r->u.c.sym);
2683 mio_expr (&r->u.ss.start);
2684 mio_expr (&r->u.ss.end);
2685 mio_charlen (&r->u.ss.length);
2694 mio_ref_list (gfc_ref **rp)
2696 gfc_ref *ref, *head, *tail;
2700 if (iomode == IO_OUTPUT)
2702 for (ref = *rp; ref; ref = ref->next)
2709 while (peek_atom () != ATOM_RPAREN)
2712 head = tail = gfc_get_ref ();
2715 tail->next = gfc_get_ref ();
2729 /* Read and write an integer value. */
2732 mio_gmp_integer (mpz_t *integer)
2736 if (iomode == IO_INPUT)
2738 if (parse_atom () != ATOM_STRING)
2739 bad_module ("Expected integer string");
2741 mpz_init (*integer);
2742 if (mpz_set_str (*integer, atom_string, 10))
2743 bad_module ("Error converting integer");
2745 gfc_free (atom_string);
2749 p = mpz_get_str (NULL, 10, *integer);
2750 write_atom (ATOM_STRING, p);
2757 mio_gmp_real (mpfr_t *real)
2762 if (iomode == IO_INPUT)
2764 if (parse_atom () != ATOM_STRING)
2765 bad_module ("Expected real string");
2768 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2769 gfc_free (atom_string);
2773 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2775 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2777 write_atom (ATOM_STRING, p);
2782 atom_string = XCNEWVEC (char, strlen (p) + 20);
2784 sprintf (atom_string, "0.%s@%ld", p, exponent);
2786 /* Fix negative numbers. */
2787 if (atom_string[2] == '-')
2789 atom_string[0] = '-';
2790 atom_string[1] = '0';
2791 atom_string[2] = '.';
2794 write_atom (ATOM_STRING, atom_string);
2796 gfc_free (atom_string);
2802 /* Save and restore the shape of an array constructor. */
2805 mio_shape (mpz_t **pshape, int rank)
2811 /* A NULL shape is represented by (). */
2814 if (iomode == IO_OUTPUT)
2826 if (t == ATOM_RPAREN)
2833 shape = gfc_get_shape (rank);
2837 for (n = 0; n < rank; n++)
2838 mio_gmp_integer (&shape[n]);
2844 static const mstring expr_types[] = {
2845 minit ("OP", EXPR_OP),
2846 minit ("FUNCTION", EXPR_FUNCTION),
2847 minit ("CONSTANT", EXPR_CONSTANT),
2848 minit ("VARIABLE", EXPR_VARIABLE),
2849 minit ("SUBSTRING", EXPR_SUBSTRING),
2850 minit ("STRUCTURE", EXPR_STRUCTURE),
2851 minit ("ARRAY", EXPR_ARRAY),
2852 minit ("NULL", EXPR_NULL),
2853 minit ("COMPCALL", EXPR_COMPCALL),
2857 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2858 generic operators, not in expressions. INTRINSIC_USER is also
2859 replaced by the correct function name by the time we see it. */
2861 static const mstring intrinsics[] =
2863 minit ("UPLUS", INTRINSIC_UPLUS),
2864 minit ("UMINUS", INTRINSIC_UMINUS),
2865 minit ("PLUS", INTRINSIC_PLUS),
2866 minit ("MINUS", INTRINSIC_MINUS),
2867 minit ("TIMES", INTRINSIC_TIMES),
2868 minit ("DIVIDE", INTRINSIC_DIVIDE),
2869 minit ("POWER", INTRINSIC_POWER),
2870 minit ("CONCAT", INTRINSIC_CONCAT),
2871 minit ("AND", INTRINSIC_AND),
2872 minit ("OR", INTRINSIC_OR),
2873 minit ("EQV", INTRINSIC_EQV),
2874 minit ("NEQV", INTRINSIC_NEQV),
2875 minit ("EQ_SIGN", INTRINSIC_EQ),
2876 minit ("EQ", INTRINSIC_EQ_OS),
2877 minit ("NE_SIGN", INTRINSIC_NE),
2878 minit ("NE", INTRINSIC_NE_OS),
2879 minit ("GT_SIGN", INTRINSIC_GT),
2880 minit ("GT", INTRINSIC_GT_OS),
2881 minit ("GE_SIGN", INTRINSIC_GE),
2882 minit ("GE", INTRINSIC_GE_OS),
2883 minit ("LT_SIGN", INTRINSIC_LT),
2884 minit ("LT", INTRINSIC_LT_OS),
2885 minit ("LE_SIGN", INTRINSIC_LE),
2886 minit ("LE", INTRINSIC_LE_OS),
2887 minit ("NOT", INTRINSIC_NOT),
2888 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2893 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2896 fix_mio_expr (gfc_expr *e)
2898 gfc_symtree *ns_st = NULL;
2901 if (iomode != IO_OUTPUT)
2906 /* If this is a symtree for a symbol that came from a contained module
2907 namespace, it has a unique name and we should look in the current
2908 namespace to see if the required, non-contained symbol is available
2909 yet. If so, the latter should be written. */
2910 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2911 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2912 e->symtree->n.sym->name);
2914 /* On the other hand, if the existing symbol is the module name or the
2915 new symbol is a dummy argument, do not do the promotion. */
2916 if (ns_st && ns_st->n.sym
2917 && ns_st->n.sym->attr.flavor != FL_MODULE
2918 && !e->symtree->n.sym->attr.dummy)
2921 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2923 /* In some circumstances, a function used in an initialization
2924 expression, in one use associated module, can fail to be
2925 coupled to its symtree when used in a specification
2926 expression in another module. */
2927 fname = e->value.function.esym ? e->value.function.esym->name
2928 : e->value.function.isym->name;
2929 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2934 /* Read and write expressions. The form "()" is allowed to indicate a
2938 mio_expr (gfc_expr **ep)
2946 if (iomode == IO_OUTPUT)
2955 MIO_NAME (expr_t) (e->expr_type, expr_types);
2960 if (t == ATOM_RPAREN)
2967 bad_module ("Expected expression type");
2969 e = *ep = gfc_get_expr ();
2970 e->where = gfc_current_locus;
2971 e->expr_type = (expr_t) find_enum (expr_types);
2974 mio_typespec (&e->ts);
2975 mio_integer (&e->rank);
2979 switch (e->expr_type)
2983 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
2985 switch (e->value.op.op)
2987 case INTRINSIC_UPLUS:
2988 case INTRINSIC_UMINUS:
2990 case INTRINSIC_PARENTHESES:
2991 mio_expr (&e->value.op.op1);
2994 case INTRINSIC_PLUS:
2995 case INTRINSIC_MINUS:
2996 case INTRINSIC_TIMES:
2997 case INTRINSIC_DIVIDE:
2998 case INTRINSIC_POWER:
2999 case INTRINSIC_CONCAT:
3003 case INTRINSIC_NEQV:
3005 case INTRINSIC_EQ_OS:
3007 case INTRINSIC_NE_OS:
3009 case INTRINSIC_GT_OS:
3011 case INTRINSIC_GE_OS:
3013 case INTRINSIC_LT_OS:
3015 case INTRINSIC_LE_OS:
3016 mio_expr (&e->value.op.op1);
3017 mio_expr (&e->value.op.op2);
3021 bad_module ("Bad operator");
3027 mio_symtree_ref (&e->symtree);
3028 mio_actual_arglist (&e->value.function.actual);
3030 if (iomode == IO_OUTPUT)
3032 e->value.function.name
3033 = mio_allocated_string (e->value.function.name);
3034 flag = e->value.function.esym != NULL;
3035 mio_integer (&flag);
3037 mio_symbol_ref (&e->value.function.esym);
3039 write_atom (ATOM_STRING, e->value.function.isym->name);
3043 require_atom (ATOM_STRING);
3044 e->value.function.name = gfc_get_string (atom_string);
3045 gfc_free (atom_string);
3047 mio_integer (&flag);
3049 mio_symbol_ref (&e->value.function.esym);
3052 require_atom (ATOM_STRING);
3053 e->value.function.isym = gfc_find_function (atom_string);
3054 gfc_free (atom_string);
3061 mio_symtree_ref (&e->symtree);
3062 mio_ref_list (&e->ref);
3065 case EXPR_SUBSTRING:
3066 e->value.character.string
3067 = CONST_CAST (gfc_char_t *,
3068 mio_allocated_wide_string (e->value.character.string,
3069 e->value.character.length));
3070 mio_ref_list (&e->ref);
3073 case EXPR_STRUCTURE:
3075 mio_constructor (&e->value.constructor);
3076 mio_shape (&e->shape, e->rank);
3083 mio_gmp_integer (&e->value.integer);
3087 gfc_set_model_kind (e->ts.kind);
3088 mio_gmp_real (&e->value.real);
3092 gfc_set_model_kind (e->ts.kind);
3093 mio_gmp_real (&mpc_realref (e->value.complex));
3094 mio_gmp_real (&mpc_imagref (e->value.complex));
3098 mio_integer (&e->value.logical);
3102 mio_integer (&e->value.character.length);
3103 e->value.character.string
3104 = CONST_CAST (gfc_char_t *,
3105 mio_allocated_wide_string (e->value.character.string,
3106 e->value.character.length));
3110 bad_module ("Bad type in constant expression");
3128 /* Read and write namelists. */
3131 mio_namelist (gfc_symbol *sym)
3133 gfc_namelist *n, *m;
3134 const char *check_name;
3138 if (iomode == IO_OUTPUT)
3140 for (n = sym->namelist; n; n = n->next)
3141 mio_symbol_ref (&n->sym);
3145 /* This departure from the standard is flagged as an error.
3146 It does, in fact, work correctly. TODO: Allow it
3148 if (sym->attr.flavor == FL_NAMELIST)
3150 check_name = find_use_name (sym->name, false);
3151 if (check_name && strcmp (check_name, sym->name) != 0)
3152 gfc_error ("Namelist %s cannot be renamed by USE "
3153 "association to %s", sym->name, check_name);
3157 while (peek_atom () != ATOM_RPAREN)
3159 n = gfc_get_namelist ();
3160 mio_symbol_ref (&n->sym);
3162 if (sym->namelist == NULL)
3169 sym->namelist_tail = m;
3176 /* Save/restore lists of gfc_interface structures. When loading an
3177 interface, we are really appending to the existing list of
3178 interfaces. Checking for duplicate and ambiguous interfaces has to
3179 be done later when all symbols have been loaded. */
3182 mio_interface_rest (gfc_interface **ip)
3184 gfc_interface *tail, *p;
3185 pointer_info *pi = NULL;
3187 if (iomode == IO_OUTPUT)
3190 for (p = *ip; p; p = p->next)
3191 mio_symbol_ref (&p->sym);
3206 if (peek_atom () == ATOM_RPAREN)
3209 p = gfc_get_interface ();
3210 p->where = gfc_current_locus;
3211 pi = mio_symbol_ref (&p->sym);
3227 /* Save/restore a nameless operator interface. */
3230 mio_interface (gfc_interface **ip)
3233 mio_interface_rest (ip);
3237 /* Save/restore a named operator interface. */
3240 mio_symbol_interface (const char **name, const char **module,
3244 mio_pool_string (name);
3245 mio_pool_string (module);
3246 mio_interface_rest (ip);
3251 mio_namespace_ref (gfc_namespace **nsp)
3256 p = mio_pointer_ref (nsp);
3258 if (p->type == P_UNKNOWN)
3259 p->type = P_NAMESPACE;
3261 if (iomode == IO_INPUT && p->integer != 0)
3263 ns = (gfc_namespace *) p->u.pointer;
3266 ns = gfc_get_namespace (NULL, 0);
3267 associate_integer_pointer (p, ns);
3275 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3277 static gfc_namespace* current_f2k_derived;
3280 mio_typebound_proc (gfc_typebound_proc** proc)
3283 int overriding_flag;
3285 if (iomode == IO_INPUT)
3287 *proc = gfc_get_typebound_proc ();
3288 (*proc)->where = gfc_current_locus;
3294 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3296 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3297 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3298 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3299 overriding_flag = mio_name (overriding_flag, binding_overriding);
3300 (*proc)->deferred = ((overriding_flag & 2) != 0);
3301 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3302 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3304 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3305 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3306 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3308 mio_pool_string (&((*proc)->pass_arg));
3310 flag = (int) (*proc)->pass_arg_num;
3311 mio_integer (&flag);
3312 (*proc)->pass_arg_num = (unsigned) flag;
3314 if ((*proc)->is_generic)
3320 if (iomode == IO_OUTPUT)
3321 for (g = (*proc)->u.generic; g; g = g->next)
3322 mio_allocated_string (g->specific_st->name);
3325 (*proc)->u.generic = NULL;
3326 while (peek_atom () != ATOM_RPAREN)
3328 gfc_symtree** sym_root;
3330 g = gfc_get_tbp_generic ();
3333 require_atom (ATOM_STRING);
3334 sym_root = ¤t_f2k_derived->tb_sym_root;
3335 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3336 gfc_free (atom_string);
3338 g->next = (*proc)->u.generic;
3339 (*proc)->u.generic = g;
3345 else if (!(*proc)->ppc)
3346 mio_symtree_ref (&(*proc)->u.specific);
3351 /* Walker-callback function for this purpose. */
3353 mio_typebound_symtree (gfc_symtree* st)
3355 if (iomode == IO_OUTPUT && !st->n.tb)
3358 if (iomode == IO_OUTPUT)
3361 mio_allocated_string (st->name);
3363 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3365 mio_typebound_proc (&st->n.tb);
3369 /* IO a full symtree (in all depth). */
3371 mio_full_typebound_tree (gfc_symtree** root)
3375 if (iomode == IO_OUTPUT)
3376 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3379 while (peek_atom () == ATOM_LPAREN)
3385 require_atom (ATOM_STRING);
3386 st = gfc_get_tbp_symtree (root, atom_string);
3387 gfc_free (atom_string);
3389 mio_typebound_symtree (st);
3397 mio_finalizer (gfc_finalizer **f)
3399 if (iomode == IO_OUTPUT)
3402 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3403 mio_symtree_ref (&(*f)->proc_tree);
3407 *f = gfc_get_finalizer ();
3408 (*f)->where = gfc_current_locus; /* Value should not matter. */
3411 mio_symtree_ref (&(*f)->proc_tree);
3412 (*f)->proc_sym = NULL;
3417 mio_f2k_derived (gfc_namespace *f2k)
3419 current_f2k_derived = f2k;
3421 /* Handle the list of finalizer procedures. */
3423 if (iomode == IO_OUTPUT)
3426 for (f = f2k->finalizers; f; f = f->next)
3431 f2k->finalizers = NULL;
3432 while (peek_atom () != ATOM_RPAREN)
3434 gfc_finalizer *cur = NULL;
3435 mio_finalizer (&cur);
3436 cur->next = f2k->finalizers;
3437 f2k->finalizers = cur;
3442 /* Handle type-bound procedures. */
3443 mio_full_typebound_tree (&f2k->tb_sym_root);
3445 /* Type-bound user operators. */
3446 mio_full_typebound_tree (&f2k->tb_uop_root);
3448 /* Type-bound intrinsic operators. */
3450 if (iomode == IO_OUTPUT)
3453 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3455 gfc_intrinsic_op realop;
3457 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3461 realop = (gfc_intrinsic_op) op;
3462 mio_intrinsic_op (&realop);
3463 mio_typebound_proc (&f2k->tb_op[op]);
3468 while (peek_atom () != ATOM_RPAREN)
3470 gfc_intrinsic_op op = 0; /* Silence GCC. */
3473 mio_intrinsic_op (&op);
3474 mio_typebound_proc (&f2k->tb_op[op]);
3481 mio_full_f2k_derived (gfc_symbol *sym)
3485 if (iomode == IO_OUTPUT)
3487 if (sym->f2k_derived)
3488 mio_f2k_derived (sym->f2k_derived);
3492 if (peek_atom () != ATOM_RPAREN)
3494 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3495 mio_f2k_derived (sym->f2k_derived);
3498 gcc_assert (!sym->f2k_derived);
3505 /* Unlike most other routines, the address of the symbol node is already
3506 fixed on input and the name/module has already been filled in. */
3509 mio_symbol (gfc_symbol *sym)
3511 int intmod = INTMOD_NONE;
3515 mio_symbol_attribute (&sym->attr);
3516 mio_typespec (&sym->ts);
3518 if (iomode == IO_OUTPUT)
3519 mio_namespace_ref (&sym->formal_ns);
3522 mio_namespace_ref (&sym->formal_ns);
3525 sym->formal_ns->proc_name = sym;
3530 /* Save/restore common block links. */
3531 mio_symbol_ref (&sym->common_next);
3533 mio_formal_arglist (&sym->formal);
3535 if (sym->attr.flavor == FL_PARAMETER)
3536 mio_expr (&sym->value);
3538 mio_array_spec (&sym->as);
3540 mio_symbol_ref (&sym->result);
3542 if (sym->attr.cray_pointee)
3543 mio_symbol_ref (&sym->cp_pointer);
3545 /* Note that components are always saved, even if they are supposed
3546 to be private. Component access is checked during searching. */
3548 mio_component_list (&sym->components);
3550 if (sym->components != NULL)
3551 sym->component_access
3552 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3554 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3555 mio_full_f2k_derived (sym);
3559 /* Add the fields that say whether this is from an intrinsic module,
3560 and if so, what symbol it is within the module. */
3561 /* mio_integer (&(sym->from_intmod)); */
3562 if (iomode == IO_OUTPUT)
3564 intmod = sym->from_intmod;
3565 mio_integer (&intmod);
3569 mio_integer (&intmod);
3570 sym->from_intmod = (intmod_id) intmod;
3573 mio_integer (&(sym->intmod_sym_id));
3575 if (sym->attr.flavor == FL_DERIVED)
3576 mio_integer (&(sym->hash_value));
3582 /************************* Top level subroutines *************************/
3584 /* Given a root symtree node and a symbol, try to find a symtree that
3585 references the symbol that is not a unique name. */
3587 static gfc_symtree *
3588 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3590 gfc_symtree *s = NULL;
3595 s = find_symtree_for_symbol (st->right, sym);
3598 s = find_symtree_for_symbol (st->left, sym);
3602 if (st->n.sym == sym && !check_unique_name (st->name))
3609 /* A recursive function to look for a specific symbol by name and by
3610 module. Whilst several symtrees might point to one symbol, its
3611 is sufficient for the purposes here than one exist. Note that
3612 generic interfaces are distinguished as are symbols that have been
3613 renamed in another module. */
3614 static gfc_symtree *
3615 find_symbol (gfc_symtree *st, const char *name,
3616 const char *module, int generic)
3619 gfc_symtree *retval, *s;
3621 if (st == NULL || st->n.sym == NULL)
3624 c = strcmp (name, st->n.sym->name);
3625 if (c == 0 && st->n.sym->module
3626 && strcmp (module, st->n.sym->module) == 0
3627 && !check_unique_name (st->name))
3629 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3631 /* Detect symbols that are renamed by use association in another
3632 module by the absence of a symtree and null attr.use_rename,
3633 since the latter is not transmitted in the module file. */
3634 if (((!generic && !st->n.sym->attr.generic)
3635 || (generic && st->n.sym->attr.generic))
3636 && !(s == NULL && !st->n.sym->attr.use_rename))
3640 retval = find_symbol (st->left, name, module, generic);
3643 retval = find_symbol (st->right, name, module, generic);
3649 /* Skip a list between balanced left and right parens. */
3659 switch (parse_atom ())
3670 gfc_free (atom_string);
3682 /* Load operator interfaces from the module. Interfaces are unusual
3683 in that they attach themselves to existing symbols. */
3686 load_operator_interfaces (void)
3689 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3691 pointer_info *pi = NULL;
3696 while (peek_atom () != ATOM_RPAREN)
3700 mio_internal_string (name);
3701 mio_internal_string (module);
3703 n = number_use_names (name, true);
3706 for (i = 1; i <= n; i++)
3708 /* Decide if we need to load this one or not. */
3709 p = find_use_name_n (name, &i, true);
3713 while (parse_atom () != ATOM_RPAREN);
3719 uop = gfc_get_uop (p);
3720 pi = mio_interface_rest (&uop->op);
3724 if (gfc_find_uop (p, NULL))
3726 uop = gfc_get_uop (p);
3727 uop->op = gfc_get_interface ();
3728 uop->op->where = gfc_current_locus;
3729 add_fixup (pi->integer, &uop->op->sym);
3738 /* Load interfaces from the module. Interfaces are unusual in that
3739 they attach themselves to existing symbols. */
3742 load_generic_interfaces (void)
3745 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3747 gfc_interface *generic = NULL;
3752 while (peek_atom () != ATOM_RPAREN)
3756 mio_internal_string (name);
3757 mio_internal_string (module);
3759 n = number_use_names (name, false);
3760 renamed = n ? 1 : 0;
3763 for (i = 1; i <= n; i++)
3766 /* Decide if we need to load this one or not. */
3767 p = find_use_name_n (name, &i, false);
3769 st = find_symbol (gfc_current_ns->sym_root,
3770 name, module_name, 1);
3772 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3774 /* Skip the specific names for these cases. */
3775 while (i == 1 && parse_atom () != ATOM_RPAREN);
3780 /* If the symbol exists already and is being USEd without being
3781 in an ONLY clause, do not load a new symtree(11.3.2). */
3782 if (!only_flag && st)
3787 /* Make the symbol inaccessible if it has been added by a USE
3788 statement without an ONLY(11.3.2). */
3790 && !st->n.sym->attr.use_only
3791 && !st->n.sym->attr.use_rename
3792 && strcmp (st->n.sym->module, module_name) == 0)
3795 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3796 st = gfc_get_unique_symtree (gfc_current_ns);
3803 if (strcmp (st->name, p) != 0)
3805 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3811 /* Since we haven't found a valid generic interface, we had
3815 gfc_get_symbol (p, NULL, &sym);
3816 sym->name = gfc_get_string (name);
3817 sym->module = gfc_get_string (module_name);
3818 sym->attr.flavor = FL_PROCEDURE;
3819 sym->attr.generic = 1;
3820 sym->attr.use_assoc = 1;
3825 /* Unless sym is a generic interface, this reference
3828 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3832 if (st && !sym->attr.generic
3834 && strcmp(module, sym->module))
3838 sym->attr.use_only = only_flag;
3839 sym->attr.use_rename = renamed;
3843 mio_interface_rest (&sym->generic);
3844 generic = sym->generic;
3846 else if (!sym->generic)
3848 sym->generic = generic;
3849 sym->attr.generic_copy = 1;
3858 /* Load common blocks. */
3863 char name[GFC_MAX_SYMBOL_LEN + 1];
3868 while (peek_atom () != ATOM_RPAREN)
3872 mio_internal_string (name);
3874 p = gfc_get_common (name, 1);
3876 mio_symbol_ref (&p->head);
3877 mio_integer (&flags);
3881 p->threadprivate = 1;
3884 /* Get whether this was a bind(c) common or not. */
3885 mio_integer (&p->is_bind_c);
3886 /* Get the binding label. */
3887 mio_internal_string (p->binding_label);
3896 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3897 so that unused variables are not loaded and so that the expression can
3903 gfc_equiv *head, *tail, *end, *eq;
3907 in_load_equiv = true;
3909 end = gfc_current_ns->equiv;
3910 while (end != NULL && end->next != NULL)
3913 while (peek_atom () != ATOM_RPAREN) {
3917 while(peek_atom () != ATOM_RPAREN)
3920 head = tail = gfc_get_equiv ();
3923 tail->eq = gfc_get_equiv ();
3927 mio_pool_string (&tail->module);
3928 mio_expr (&tail->expr);
3931 /* Unused equivalence members have a unique name. In addition, it
3932 must be checked that the symbols are from the same module. */
3934 for (eq = head; eq; eq = eq->eq)
3936 if (eq->expr->symtree->n.sym->module
3937 && head->expr->symtree->n.sym->module
3938 && strcmp (head->expr->symtree->n.sym->module,
3939 eq->expr->symtree->n.sym->module) == 0
3940 && !check_unique_name (eq->expr->symtree->name))
3949 for (eq = head; eq; eq = head)
3952 gfc_free_expr (eq->expr);
3958 gfc_current_ns->equiv = head;
3969 in_load_equiv = false;
3973 /* This function loads the sym_root of f2k_derived with the extensions to
3974 the derived type. */
3976 load_derived_extensions (void)
3979 gfc_symbol *derived;
3983 char name[GFC_MAX_SYMBOL_LEN + 1];
3984 char module[GFC_MAX_SYMBOL_LEN + 1];
3988 while (peek_atom () != ATOM_RPAREN)
3991 mio_integer (&symbol);
3992 info = get_integer (symbol);
3993 derived = info->u.rsym.sym;
3995 /* This one is not being loaded. */
3996 if (!info || !derived)
3998 while (peek_atom () != ATOM_RPAREN)
4003 gcc_assert (derived->attr.flavor == FL_DERIVED);
4004 if (derived->f2k_derived == NULL)
4005 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4007 while (peek_atom () != ATOM_RPAREN)
4010 mio_internal_string (name);
4011 mio_internal_string (module);
4013 /* Only use one use name to find the symbol. */
4015 p = find_use_name_n (name, &j, false);
4018 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4020 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4023 /* Only use the real name in f2k_derived to ensure a single
4025 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4038 /* Recursive function to traverse the pointer_info tree and load a
4039 needed symbol. We return nonzero if we load a symbol and stop the
4040 traversal, because the act of loading can alter the tree. */
4043 load_needed (pointer_info *p)
4054 rv |= load_needed (p->left);
4055 rv |= load_needed (p->right);
4057 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4060 p->u.rsym.state = USED;
4062 set_module_locus (&p->u.rsym.where);
4064 sym = p->u.rsym.sym;
4067 q = get_integer (p->u.rsym.ns);
4069 ns = (gfc_namespace *) q->u.pointer;
4072 /* Create an interface namespace if necessary. These are
4073 the namespaces that hold the formal parameters of module
4076 ns = gfc_get_namespace (NULL, 0);
4077 associate_integer_pointer (q, ns);
4080 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4081 doesn't go pear-shaped if the symbol is used. */
4083 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4086 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4087 sym->module = gfc_get_string (p->u.rsym.module);
4088 strcpy (sym->binding_label, p->u.rsym.binding_label);
4090 associate_integer_pointer (p, sym);
4094 sym->attr.use_assoc = 1;
4096 sym->attr.use_only = 1;
4097 if (p->u.rsym.renamed)
4098 sym->attr.use_rename = 1;
4104 /* Recursive function for cleaning up things after a module has been read. */
4107 read_cleanup (pointer_info *p)
4115 read_cleanup (p->left);
4116 read_cleanup (p->right);
4118 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4120 /* Add hidden symbols to the symtree. */
4121 q = get_integer (p->u.rsym.ns);
4122 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
4124 st->n.sym = p->u.rsym.sym;
4127 /* Fixup any symtree references. */
4128 p->u.rsym.symtree = st;
4129 resolve_fixups (p->u.rsym.stfixup, st);
4130 p->u.rsym.stfixup = NULL;
4133 /* Free unused symbols. */
4134 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4135 gfc_free_symbol (p->u.rsym.sym);
4139 /* It is not quite enough to check for ambiguity in the symbols by
4140 the loaded symbol and the new symbol not being identical. */
4142 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4146 symbol_attribute attr;
4148 rsym = info->u.rsym.sym;
4152 /* If the existing symbol is generic from a different module and
4153 the new symbol is generic there can be no ambiguity. */
4154 if (st_sym->attr.generic
4156 && strcmp (st_sym->module, module_name))
4158 /* The new symbol's attributes have not yet been read. Since
4159 we need attr.generic, read it directly. */
4160 get_module_locus (&locus);
4161 set_module_locus (&info->u.rsym.where);
4164 mio_symbol_attribute (&attr);
4165 set_module_locus (&locus);
4174 /* Read a module file. */
4179 module_locus operator_interfaces, user_operators, extensions;
4181 char name[GFC_MAX_SYMBOL_LEN + 1];
4183 int ambiguous, j, nuse, symbol;
4184 pointer_info *info, *q;
4189 get_module_locus (&operator_interfaces); /* Skip these for now. */
4192 get_module_locus (&user_operators);
4196 /* Skip commons, equivalences and derived type extensions for now. */
4200 get_module_locus (&extensions);
4205 /* Create the fixup nodes for all the symbols. */
4207 while (peek_atom () != ATOM_RPAREN)
4209 require_atom (ATOM_INTEGER);
4210 info = get_integer (atom_int);
4212 info->type = P_SYMBOL;
4213 info->u.rsym.state = UNUSED;
4215 mio_internal_string (info->u.rsym.true_name);
4216 mio_internal_string (info->u.rsym.module);
4217 mio_internal_string (info->u.rsym.binding_label);
4220 require_atom (ATOM_INTEGER);
4221 info->u.rsym.ns = atom_int;
4223 get_module_locus (&info->u.rsym.where);
4226 /* See if the symbol has already been loaded by a previous module.
4227 If so, we reference the existing symbol and prevent it from
4228 being loaded again. This should not happen if the symbol being
4229 read is an index for an assumed shape dummy array (ns != 1). */
4231 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4234 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4237 info->u.rsym.state = USED;
4238 info->u.rsym.sym = sym;
4240 /* Some symbols do not have a namespace (eg. formal arguments),
4241 so the automatic "unique symtree" mechanism must be suppressed
4242 by marking them as referenced. */
4243 q = get_integer (info->u.rsym.ns);
4244 if (q->u.pointer == NULL)
4246 info->u.rsym.referenced = 1;
4250 /* If possible recycle the symtree that references the symbol.
4251 If a symtree is not found and the module does not import one,
4252 a unique-name symtree is found by read_cleanup. */
4253 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4256 info->u.rsym.symtree = st;
4257 info->u.rsym.referenced = 1;
4263 /* Parse the symtree lists. This lets us mark which symbols need to
4264 be loaded. Renaming is also done at this point by replacing the
4269 while (peek_atom () != ATOM_RPAREN)
4271 mio_internal_string (name);
4272 mio_integer (&ambiguous);
4273 mio_integer (&symbol);
4275 info = get_integer (symbol);
4277 /* See how many use names there are. If none, go through the start
4278 of the loop at least once. */
4279 nuse = number_use_names (name, false);
4280 info->u.rsym.renamed = nuse ? 1 : 0;
4285 for (j = 1; j <= nuse; j++)
4287 /* Get the jth local name for this symbol. */
4288 p = find_use_name_n (name, &j, false);
4290 if (p == NULL && strcmp (name, module_name) == 0)
4293 /* Skip symtree nodes not in an ONLY clause, unless there
4294 is an existing symtree loaded from another USE statement. */
4297 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4299 info->u.rsym.symtree = st;
4303 /* If a symbol of the same name and module exists already,
4304 this symbol, which is not in an ONLY clause, must not be
4305 added to the namespace(11.3.2). Note that find_symbol
4306 only returns the first occurrence that it finds. */
4307 if (!only_flag && !info->u.rsym.renamed
4308 && strcmp (name, module_name) != 0
4309 && find_symbol (gfc_current_ns->sym_root, name,
4313 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4317 /* Check for ambiguous symbols. */
4318 if (check_for_ambiguous (st->n.sym, info))
4320 info->u.rsym.symtree = st;
4324 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4326 /* Delete the symtree if the symbol has been added by a USE
4327 statement without an ONLY(11.3.2). Remember that the rsym
4328 will be the same as the symbol found in the symtree, for
4330 if (st && (only_flag || info->u.rsym.renamed)
4331 && !st->n.sym->attr.use_only
4332 && !st->n.sym->attr.use_rename
4333 && info->u.rsym.sym == st->n.sym)
4334 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4336 /* Create a symtree node in the current namespace for this
4338 st = check_unique_name (p)
4339 ? gfc_get_unique_symtree (gfc_current_ns)
4340 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4341 st->ambiguous = ambiguous;
4343 sym = info->u.rsym.sym;
4345 /* Create a symbol node if it doesn't already exist. */
4348 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4350 sym = info->u.rsym.sym;
4351 sym->module = gfc_get_string (info->u.rsym.module);
4353 /* TODO: hmm, can we test this? Do we know it will be
4354 initialized to zeros? */
4355 if (info->u.rsym.binding_label[0] != '\0')
4356 strcpy (sym->binding_label, info->u.rsym.binding_label);
4362 if (strcmp (name, p) != 0)
4363 sym->attr.use_rename = 1;
4365 /* We need to set the only_flag here so that symbols from the
4366 same USE...ONLY but earlier are not deleted from the tree in
4367 the gfc_delete_symtree above. */
4368 sym->attr.use_only = only_flag;
4370 /* Store the symtree pointing to this symbol. */
4371 info->u.rsym.symtree = st;
4373 if (info->u.rsym.state == UNUSED)
4374 info->u.rsym.state = NEEDED;
4375 info->u.rsym.referenced = 1;
4382 /* Load intrinsic operator interfaces. */
4383 set_module_locus (&operator_interfaces);
4386 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4388 if (i == INTRINSIC_USER)
4393 u = find_use_operator ((gfc_intrinsic_op) i);
4404 mio_interface (&gfc_current_ns->op[i]);
4409 /* Load generic and user operator interfaces. These must follow the
4410 loading of symtree because otherwise symbols can be marked as
4413 set_module_locus (&user_operators);
4415 load_operator_interfaces ();
4416 load_generic_interfaces ();
4421 /* At this point, we read those symbols that are needed but haven't
4422 been loaded yet. If one symbol requires another, the other gets
4423 marked as NEEDED if its previous state was UNUSED. */
4425 while (load_needed (pi_root));
4427 /* Make sure all elements of the rename-list were found in the module. */
4429 for (u = gfc_rename_list; u; u = u->next)
4434 if (u->op == INTRINSIC_NONE)
4436 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4437 u->use_name, &u->where, module_name);
4441 if (u->op == INTRINSIC_USER)
4443 gfc_error ("User operator '%s' referenced at %L not found "
4444 "in module '%s'", u->use_name, &u->where, module_name);
4448 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4449 "in module '%s'", gfc_op2string (u->op), &u->where,
4453 gfc_check_interfaces (gfc_current_ns);
4455 /* Now we should be in a position to fill f2k_derived with derived type
4456 extensions, since everything has been loaded. */
4457 set_module_locus (&extensions);
4458 load_derived_extensions ();
4460 /* Clean up symbol nodes that were never loaded, create references
4461 to hidden symbols. */
4463 read_cleanup (pi_root);
4467 /* Given an access type that is specific to an entity and the default
4468 access, return nonzero if the entity is publicly accessible. If the
4469 element is declared as PUBLIC, then it is public; if declared
4470 PRIVATE, then private, and otherwise it is public unless the default
4471 access in this context has been declared PRIVATE. */
4474 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4476 if (specific_access == ACCESS_PUBLIC)
4478 if (specific_access == ACCESS_PRIVATE)
4481 if (gfc_option.flag_module_private)
4482 return default_access == ACCESS_PUBLIC;
4484 return default_access != ACCESS_PRIVATE;
4488 /* A structure to remember which commons we've already written. */
4490 struct written_common
4492 BBT_HEADER(written_common);
4493 const char *name, *label;
4496 static struct written_common *written_commons = NULL;
4498 /* Comparison function used for balancing the binary tree. */
4501 compare_written_commons (void *a1, void *b1)
4503 const char *aname = ((struct written_common *) a1)->name;
4504 const char *alabel = ((struct written_common *) a1)->label;
4505 const char *bname = ((struct written_common *) b1)->name;
4506 const char *blabel = ((struct written_common *) b1)->label;
4507 int c = strcmp (aname, bname);
4509 return (c != 0 ? c : strcmp (alabel, blabel));
4512 /* Free a list of written commons. */
4515 free_written_common (struct written_common *w)
4521 free_written_common (w->left);
4523 free_written_common (w->right);
4528 /* Write a common block to the module -- recursive helper function. */
4531 write_common_0 (gfc_symtree *st, bool this_module)
4537 struct written_common *w;
4538 bool write_me = true;
4543 write_common_0 (st->left, this_module);
4545 /* We will write out the binding label, or the name if no label given. */
4546 name = st->n.common->name;
4548 label = p->is_bind_c ? p->binding_label : p->name;
4550 /* Check if we've already output this common. */
4551 w = written_commons;
4554 int c = strcmp (name, w->name);
4555 c = (c != 0 ? c : strcmp (label, w->label));
4559 w = (c < 0) ? w->left : w->right;
4562 if (this_module && p->use_assoc)
4567 /* Write the common to the module. */
4569 mio_pool_string (&name);
4571 mio_symbol_ref (&p->head);
4572 flags = p->saved ? 1 : 0;
4573 if (p->threadprivate)
4575 mio_integer (&flags);
4577 /* Write out whether the common block is bind(c) or not. */
4578 mio_integer (&(p->is_bind_c));
4580 mio_pool_string (&label);
4583 /* Record that we have written this common. */
4584 w = XCNEW (struct written_common);
4587 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4590 write_common_0 (st->right, this_module);
4594 /* Write a common, by initializing the list of written commons, calling
4595 the recursive function write_common_0() and cleaning up afterwards. */
4598 write_common (gfc_symtree *st)
4600 written_commons = NULL;
4601 write_common_0 (st, true);
4602 write_common_0 (st, false);
4603 free_written_common (written_commons);
4604 written_commons = NULL;
4608 /* Write the blank common block to the module. */
4611 write_blank_common (void)
4613 const char * name = BLANK_COMMON_NAME;
4615 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4616 this, but it hasn't been checked. Just making it so for now. */
4619 if (gfc_current_ns->blank_common.head == NULL)
4624 mio_pool_string (&name);
4626 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4627 saved = gfc_current_ns->blank_common.saved;
4628 mio_integer (&saved);
4630 /* Write out whether the common block is bind(c) or not. */
4631 mio_integer (&is_bind_c);
4633 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4634 it doesn't matter because the label isn't used. */
4635 mio_pool_string (&name);
4641 /* Write equivalences to the module. */
4650 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4654 for (e = eq; e; e = e->eq)
4656 if (e->module == NULL)
4657 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4658 mio_allocated_string (e->module);
4659 mio_expr (&e->expr);
4668 /* Write derived type extensions to the module. */
4671 write_dt_extensions (gfc_symtree *st)
4673 if (!gfc_check_access (st->n.sym->attr.access,
4674 st->n.sym->ns->default_access))
4678 mio_pool_string (&st->n.sym->name);
4679 if (st->n.sym->module != NULL)
4680 mio_pool_string (&st->n.sym->module);
4682 mio_internal_string (module_name);
4687 write_derived_extensions (gfc_symtree *st)
4689 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4690 && (st->n.sym->f2k_derived != NULL)
4691 && (st->n.sym->f2k_derived->sym_root != NULL)))
4695 mio_symbol_ref (&(st->n.sym));
4696 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4697 write_dt_extensions);
4702 /* Write a symbol to the module. */
4705 write_symbol (int n, gfc_symbol *sym)
4709 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4710 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4713 mio_pool_string (&sym->name);
4715 mio_pool_string (&sym->module);
4716 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4718 label = sym->binding_label;
4719 mio_pool_string (&label);
4722 mio_pool_string (&sym->name);
4724 mio_pointer_ref (&sym->ns);
4731 /* Recursive traversal function to write the initial set of symbols to
4732 the module. We check to see if the symbol should be written
4733 according to the access specification. */
4736 write_symbol0 (gfc_symtree *st)
4740 bool dont_write = false;
4745 write_symbol0 (st->left);
4748 if (sym->module == NULL)
4749 sym->module = gfc_get_string (module_name);
4751 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4752 && !sym->attr.subroutine && !sym->attr.function)
4755 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4760 p = get_pointer (sym);
4761 if (p->type == P_UNKNOWN)
4764 if (p->u.wsym.state != WRITTEN)
4766 write_symbol (p->integer, sym);
4767 p->u.wsym.state = WRITTEN;
4771 write_symbol0 (st->right);
4775 /* Recursive traversal function to write the secondary set of symbols
4776 to the module file. These are symbols that were not public yet are
4777 needed by the public symbols or another dependent symbol. The act
4778 of writing a symbol can modify the pointer_info tree, so we cease
4779 traversal if we find a symbol to write. We return nonzero if a
4780 symbol was written and pass that information upwards. */
4783 write_symbol1 (pointer_info *p)
4790 result = write_symbol1 (p->left);
4792 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4794 p->u.wsym.state = WRITTEN;
4795 write_symbol (p->integer, p->u.wsym.sym);
4799 result |= write_symbol1 (p->right);
4804 /* Write operator interfaces associated with a symbol. */
4807 write_operator (gfc_user_op *uop)
4809 static char nullstring[] = "";
4810 const char *p = nullstring;
4813 || !gfc_check_access (uop->access, uop->ns->default_access))
4816 mio_symbol_interface (&uop->name, &p, &uop->op);
4820 /* Write generic interfaces from the namespace sym_root. */
4823 write_generic (gfc_symtree *st)
4830 write_generic (st->left);
4831 write_generic (st->right);
4834 if (!sym || check_unique_name (st->name))
4837 if (sym->generic == NULL
4838 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4841 if (sym->module == NULL)
4842 sym->module = gfc_get_string (module_name);
4844 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4849 write_symtree (gfc_symtree *st)
4856 /* A symbol in an interface body must not be visible in the
4858 if (sym->ns != gfc_current_ns
4859 && sym->ns->proc_name
4860 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4863 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4864 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4865 && !sym->attr.subroutine && !sym->attr.function))
4868 if (check_unique_name (st->name))
4871 p = find_pointer (sym);
4873 gfc_internal_error ("write_symtree(): Symbol not written");
4875 mio_pool_string (&st->name);
4876 mio_integer (&st->ambiguous);
4877 mio_integer (&p->integer);
4886 /* Write the operator interfaces. */
4889 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4891 if (i == INTRINSIC_USER)
4894 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4895 gfc_current_ns->default_access)
4896 ? &gfc_current_ns->op[i] : NULL);
4904 gfc_traverse_user_op (gfc_current_ns, write_operator);
4910 write_generic (gfc_current_ns->sym_root);
4916 write_blank_common ();
4917 write_common (gfc_current_ns->common_root);
4929 gfc_traverse_symtree (gfc_current_ns->sym_root,
4930 write_derived_extensions);
4935 /* Write symbol information. First we traverse all symbols in the
4936 primary namespace, writing those that need to be written.
4937 Sometimes writing one symbol will cause another to need to be
4938 written. A list of these symbols ends up on the write stack, and
4939 we end by popping the bottom of the stack and writing the symbol
4940 until the stack is empty. */
4944 write_symbol0 (gfc_current_ns->sym_root);
4945 while (write_symbol1 (pi_root))
4954 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
4959 /* Read a MD5 sum from the header of a module file. If the file cannot
4960 be opened, or we have any other error, we return -1. */
4963 read_md5_from_module_file (const char * filename, unsigned char md5[16])
4969 /* Open the file. */
4970 if ((file = fopen (filename, "r")) == NULL)
4973 /* Read the first line. */
4974 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
4980 /* The file also needs to be overwritten if the version number changed. */
4981 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
4982 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
4988 /* Read a second line. */
4989 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
4995 /* Close the file. */
4998 /* If the header is not what we expect, or is too short, bail out. */
4999 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5002 /* Now, we have a real MD5, read it into the array. */
5003 for (n = 0; n < 16; n++)
5007 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5017 /* Given module, dump it to disk. If there was an error while
5018 processing the module, dump_flag will be set to zero and we delete
5019 the module file, even if it was already there. */
5022 gfc_dump_module (const char *name, int dump_flag)
5025 char *filename, *filename_tmp, *p;
5028 unsigned char md5_new[16], md5_old[16];
5030 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5031 if (gfc_option.module_dir != NULL)
5033 n += strlen (gfc_option.module_dir);
5034 filename = (char *) alloca (n);
5035 strcpy (filename, gfc_option.module_dir);
5036 strcat (filename, name);
5040 filename = (char *) alloca (n);
5041 strcpy (filename, name);
5043 strcat (filename, MODULE_EXTENSION);
5045 /* Name of the temporary file used to write the module. */
5046 filename_tmp = (char *) alloca (n + 1);
5047 strcpy (filename_tmp, filename);
5048 strcat (filename_tmp, "0");
5050 /* There was an error while processing the module. We delete the
5051 module file, even if it was already there. */
5058 /* Write the module to the temporary file. */
5059 module_fp = fopen (filename_tmp, "w");
5060 if (module_fp == NULL)
5061 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5062 filename_tmp, strerror (errno));
5064 /* Write the header, including space reserved for the MD5 sum. */
5068 *strchr (p, '\n') = '\0';
5070 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5071 "MD5:", MOD_VERSION, gfc_source_file, p);
5072 fgetpos (module_fp, &md5_pos);
5073 fputs ("00000000000000000000000000000000 -- "
5074 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5076 /* Initialize the MD5 context that will be used for output. */
5077 md5_init_ctx (&ctx);
5079 /* Write the module itself. */
5081 strcpy (module_name, name);
5087 free_pi_tree (pi_root);
5092 /* Write the MD5 sum to the header of the module file. */
5093 md5_finish_ctx (&ctx, md5_new);
5094 fsetpos (module_fp, &md5_pos);
5095 for (n = 0; n < 16; n++)
5096 fprintf (module_fp, "%02x", md5_new[n]);
5098 if (fclose (module_fp))
5099 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5100 filename_tmp, strerror (errno));
5102 /* Read the MD5 from the header of the old module file and compare. */
5103 if (read_md5_from_module_file (filename, md5_old) != 0
5104 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5106 /* Module file have changed, replace the old one. */
5107 if (unlink (filename) && errno != ENOENT)
5108 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5110 if (rename (filename_tmp, filename))
5111 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5112 filename_tmp, filename, strerror (errno));
5116 if (unlink (filename_tmp))
5117 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5118 filename_tmp, strerror (errno));
5124 sort_iso_c_rename_list (void)
5126 gfc_use_rename *tmp_list = NULL;
5127 gfc_use_rename *curr;
5128 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
5132 for (curr = gfc_rename_list; curr; curr = curr->next)
5134 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
5135 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
5137 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5138 "intrinsic module ISO_C_BINDING.", curr->use_name,
5142 /* Put it in the list. */
5143 kinds_used[c_kind] = curr;
5146 /* Make a new (sorted) rename list. */
5148 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
5151 if (i < ISOCBINDING_NUMBER)
5153 tmp_list = kinds_used[i];
5157 for (; i < ISOCBINDING_NUMBER; i++)
5158 if (kinds_used[i] != NULL)
5160 curr->next = kinds_used[i];
5166 gfc_rename_list = tmp_list;
5170 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5171 the current namespace for all named constants, pointer types, and
5172 procedures in the module unless the only clause was used or a rename
5173 list was provided. */
5176 import_iso_c_binding_module (void)
5178 gfc_symbol *mod_sym = NULL;
5179 gfc_symtree *mod_symtree = NULL;
5180 const char *iso_c_module_name = "__iso_c_binding";
5185 /* Look only in the current namespace. */
5186 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5188 if (mod_symtree == NULL)
5190 /* symtree doesn't already exist in current namespace. */
5191 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5194 if (mod_symtree != NULL)
5195 mod_sym = mod_symtree->n.sym;
5197 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5198 "create symbol for %s", iso_c_module_name);
5200 mod_sym->attr.flavor = FL_MODULE;
5201 mod_sym->attr.intrinsic = 1;
5202 mod_sym->module = gfc_get_string (iso_c_module_name);
5203 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5206 /* Generate the symbols for the named constants representing
5207 the kinds for intrinsic data types. */
5210 /* Sort the rename list because there are dependencies between types
5211 and procedures (e.g., c_loc needs c_ptr). */
5212 sort_iso_c_rename_list ();
5214 for (u = gfc_rename_list; u; u = u->next)
5216 i = get_c_kind (u->use_name, c_interop_kinds_table);
5218 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
5220 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5221 "intrinsic module ISO_C_BINDING.", u->use_name,
5226 generate_isocbinding_symbol (iso_c_module_name,
5227 (iso_c_binding_symbol) i,
5233 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5236 for (u = gfc_rename_list; u; u = u->next)
5238 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5240 local_name = u->local_name;
5245 generate_isocbinding_symbol (iso_c_module_name,
5246 (iso_c_binding_symbol) i,
5250 for (u = gfc_rename_list; u; u = u->next)
5255 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5256 "module ISO_C_BINDING", u->use_name, &u->where);
5262 /* Add an integer named constant from a given module. */
5265 create_int_parameter (const char *name, int value, const char *modname,
5266 intmod_id module, int id)
5268 gfc_symtree *tmp_symtree;
5271 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5272 if (tmp_symtree != NULL)
5274 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5277 gfc_error ("Symbol '%s' already declared", name);
5280 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5281 sym = tmp_symtree->n.sym;
5283 sym->module = gfc_get_string (modname);
5284 sym->attr.flavor = FL_PARAMETER;
5285 sym->ts.type = BT_INTEGER;
5286 sym->ts.kind = gfc_default_integer_kind;
5287 sym->value = gfc_int_expr (value);
5288 sym->attr.use_assoc = 1;
5289 sym->from_intmod = module;
5290 sym->intmod_sym_id = id;
5294 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5297 use_iso_fortran_env_module (void)
5299 static char mod[] = "iso_fortran_env";
5300 const char *local_name;
5302 gfc_symbol *mod_sym;
5303 gfc_symtree *mod_symtree;
5306 intmod_sym symbol[] = {
5307 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5308 #include "iso-fortran-env.def"
5310 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5313 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5314 #include "iso-fortran-env.def"
5317 /* Generate the symbol for the module itself. */
5318 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5319 if (mod_symtree == NULL)
5321 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5322 gcc_assert (mod_symtree);
5323 mod_sym = mod_symtree->n.sym;
5325 mod_sym->attr.flavor = FL_MODULE;
5326 mod_sym->attr.intrinsic = 1;
5327 mod_sym->module = gfc_get_string (mod);
5328 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5331 if (!mod_symtree->n.sym->attr.intrinsic)
5332 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5333 "non-intrinsic module name used previously", mod);
5335 /* Generate the symbols for the module integer named constants. */
5337 for (u = gfc_rename_list; u; u = u->next)
5339 for (i = 0; symbol[i].name; i++)
5340 if (strcmp (symbol[i].name, u->use_name) == 0)
5343 if (symbol[i].name == NULL)
5345 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5346 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
5351 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5352 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5353 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5354 "from intrinsic module ISO_FORTRAN_ENV at %L is "
5355 "incompatible with option %s", &u->where,
5356 gfc_option.flag_default_integer
5357 ? "-fdefault-integer-8" : "-fdefault-real-8");
5359 create_int_parameter (u->local_name[0] ? u->local_name
5361 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5366 for (i = 0; symbol[i].name; i++)
5369 for (u = gfc_rename_list; u; u = u->next)
5371 if (strcmp (symbol[i].name, u->use_name) == 0)
5373 local_name = u->local_name;
5379 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5380 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5381 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5382 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5383 "incompatible with option %s",
5384 gfc_option.flag_default_integer
5385 ? "-fdefault-integer-8" : "-fdefault-real-8");
5387 create_int_parameter (local_name ? local_name : symbol[i].name,
5388 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5392 for (u = gfc_rename_list; u; u = u->next)
5397 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5398 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5404 /* Process a USE directive. */
5407 gfc_use_module (void)
5412 gfc_symtree *mod_symtree;
5413 gfc_use_list *use_stmt;
5415 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5417 strcpy (filename, module_name);
5418 strcat (filename, MODULE_EXTENSION);
5420 /* First, try to find an non-intrinsic module, unless the USE statement
5421 specified that the module is intrinsic. */
5424 module_fp = gfc_open_included_file (filename, true, true);
5426 /* Then, see if it's an intrinsic one, unless the USE statement
5427 specified that the module is non-intrinsic. */
5428 if (module_fp == NULL && !specified_nonint)
5430 if (strcmp (module_name, "iso_fortran_env") == 0
5431 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5432 "intrinsic module at %C") != FAILURE)
5434 use_iso_fortran_env_module ();
5438 if (strcmp (module_name, "iso_c_binding") == 0
5439 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5440 "ISO_C_BINDING module at %C") != FAILURE)
5442 import_iso_c_binding_module();
5446 module_fp = gfc_open_intrinsic_module (filename);
5448 if (module_fp == NULL && specified_int)
5449 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5453 if (module_fp == NULL)
5454 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5455 filename, strerror (errno));
5457 /* Check that we haven't already USEd an intrinsic module with the
5460 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5461 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5462 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5463 "intrinsic module name used previously", module_name);
5470 /* Skip the first two lines of the module, after checking that this is
5471 a gfortran module file. */
5477 bad_module ("Unexpected end of module");
5480 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5481 || (start == 2 && strcmp (atom_name, " module") != 0))
5482 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5486 if (strcmp (atom_name, " version") != 0
5487 || module_char () != ' '
5488 || parse_atom () != ATOM_STRING)
5489 gfc_fatal_error ("Parse error when checking module version"
5490 " for file '%s' opened at %C", filename);
5492 if (strcmp (atom_string, MOD_VERSION))
5494 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5495 "for file '%s' opened at %C", atom_string,
5496 MOD_VERSION, filename);
5504 /* Make sure we're not reading the same module that we may be building. */
5505 for (p = gfc_state_stack; p; p = p->previous)
5506 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5507 gfc_fatal_error ("Can't USE the same module we're building!");
5510 init_true_name_tree ();
5514 free_true_name (true_name_root);
5515 true_name_root = NULL;
5517 free_pi_tree (pi_root);
5522 use_stmt = gfc_get_use_list ();
5523 use_stmt->module_name = gfc_get_string (module_name);
5524 use_stmt->only_flag = only_flag;
5525 use_stmt->rename = gfc_rename_list;
5526 use_stmt->where = use_locus;
5527 gfc_rename_list = NULL;
5528 use_stmt->next = gfc_current_ns->use_stmts;
5529 gfc_current_ns->use_stmts = use_stmt;
5534 gfc_free_use_stmts (gfc_use_list *use_stmts)
5537 for (; use_stmts; use_stmts = next)
5539 gfc_use_rename *next_rename;
5541 for (; use_stmts->rename; use_stmts->rename = next_rename)
5543 next_rename = use_stmts->rename->next;
5544 gfc_free (use_stmts->rename);
5546 next = use_stmts->next;
5547 gfc_free (use_stmts);
5553 gfc_module_init_2 (void)
5555 last_atom = ATOM_LPAREN;
5560 gfc_module_done_2 (void)