1 /* Handle modules, which amounts to loading and saving symbols and
2 their attendant structures.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
5 Free Software Foundation, Inc.
6 Contributed by Andy Vaught
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
25 sequence of atoms, which can be left or right parenthesis, names,
26 integers or strings. Parenthesis are always matched which allows
27 us to skip over sections at high speed without having to know
28 anything about the internal structure of the lists. A "name" is
29 usually a fortran 95 identifier, but can also start with '@' in
30 order to reference a hidden symbol.
32 The first line of a module is an informational message about what
33 created the module, the file it came from and when it was created.
34 The second line is a warning for people not to edit the module.
35 The rest of the module looks like:
37 ( ( <Interface info for UPLUS> )
38 ( <Interface info for UMINUS> )
41 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
44 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
47 ( ( <common name> <symbol> <saved flag>)
53 ( <Symbol Number (in no particular order)>
55 <Module name of symbol>
56 ( <symbol information> )
65 In general, symbols refer to other symbols by their symbol number,
66 which are zero based. Symbols are written to the module in no
74 #include "parse.h" /* FIXME */
76 #include "constructor.h"
79 #define MODULE_EXTENSION ".mod"
81 /* Don't put any single quote (') in MOD_VERSION,
82 if yout want it to be recognized. */
83 #define MOD_VERSION "7"
86 /* Structure that describes a position within a module file. */
95 /* Structure for list of symbols of intrinsic modules. */
108 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
112 /* The fixup structure lists pointers to pointers that have to
113 be updated when a pointer value becomes known. */
115 typedef struct fixup_t
118 struct fixup_t *next;
123 /* Structure for holding extra info needed for pointers being read. */
139 typedef struct pointer_info
141 BBT_HEADER (pointer_info);
145 /* The first component of each member of the union is the pointer
152 void *pointer; /* Member for doing pointer searches. */
157 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
158 enum gfc_rsym_state state;
159 int ns, referenced, renamed;
162 gfc_symtree *symtree;
163 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
170 enum gfc_wsym_state state;
179 #define gfc_get_pointer_info() XCNEW (pointer_info)
182 /* Local variables */
184 /* The FILE for the module we're reading or writing. */
185 static FILE *module_fp;
187 /* MD5 context structure. */
188 static struct md5_ctx ctx;
190 /* The name of the module we're reading (USE'ing) or writing. */
191 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
193 /* The way the module we're reading was specified. */
194 static bool specified_nonint, specified_int;
196 static int module_line, module_column, only_flag;
198 { IO_INPUT, IO_OUTPUT }
201 static gfc_use_rename *gfc_rename_list;
202 static pointer_info *pi_root;
203 static int symbol_number; /* Counter for assigning symbol numbers */
205 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
206 static bool in_load_equiv;
208 static locus use_locus;
212 /*****************************************************************/
214 /* Pointer/integer conversion. Pointers between structures are stored
215 as integers in the module file. The next couple of subroutines
216 handle this translation for reading and writing. */
218 /* Recursively free the tree of pointer structures. */
221 free_pi_tree (pointer_info *p)
226 if (p->fixup != NULL)
227 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
229 free_pi_tree (p->left);
230 free_pi_tree (p->right);
236 /* Compare pointers when searching by pointer. Used when writing a
240 compare_pointers (void *_sn1, void *_sn2)
242 pointer_info *sn1, *sn2;
244 sn1 = (pointer_info *) _sn1;
245 sn2 = (pointer_info *) _sn2;
247 if (sn1->u.pointer < sn2->u.pointer)
249 if (sn1->u.pointer > sn2->u.pointer)
256 /* Compare integers when searching by integer. Used when reading a
260 compare_integers (void *_sn1, void *_sn2)
262 pointer_info *sn1, *sn2;
264 sn1 = (pointer_info *) _sn1;
265 sn2 = (pointer_info *) _sn2;
267 if (sn1->integer < sn2->integer)
269 if (sn1->integer > sn2->integer)
276 /* Initialize the pointer_info tree. */
285 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
287 /* Pointer 0 is the NULL pointer. */
288 p = gfc_get_pointer_info ();
293 gfc_insert_bbt (&pi_root, p, compare);
295 /* Pointer 1 is the current namespace. */
296 p = gfc_get_pointer_info ();
297 p->u.pointer = gfc_current_ns;
299 p->type = P_NAMESPACE;
301 gfc_insert_bbt (&pi_root, p, compare);
307 /* During module writing, call here with a pointer to something,
308 returning the pointer_info node. */
310 static pointer_info *
311 find_pointer (void *gp)
318 if (p->u.pointer == gp)
320 p = (gp < p->u.pointer) ? p->left : p->right;
327 /* Given a pointer while writing, returns the pointer_info tree node,
328 creating it if it doesn't exist. */
330 static pointer_info *
331 get_pointer (void *gp)
335 p = find_pointer (gp);
339 /* Pointer doesn't have an integer. Give it one. */
340 p = gfc_get_pointer_info ();
343 p->integer = symbol_number++;
345 gfc_insert_bbt (&pi_root, p, compare_pointers);
351 /* Given an integer during reading, find it in the pointer_info tree,
352 creating the node if not found. */
354 static pointer_info *
355 get_integer (int integer)
365 c = compare_integers (&t, p);
369 p = (c < 0) ? p->left : p->right;
375 p = gfc_get_pointer_info ();
376 p->integer = integer;
379 gfc_insert_bbt (&pi_root, p, compare_integers);
385 /* Recursive function to find a pointer within a tree by brute force. */
387 static pointer_info *
388 fp2 (pointer_info *p, const void *target)
395 if (p->u.pointer == target)
398 q = fp2 (p->left, target);
402 return fp2 (p->right, target);
406 /* During reading, find a pointer_info node from the pointer value.
407 This amounts to a brute-force search. */
409 static pointer_info *
410 find_pointer2 (void *p)
412 return fp2 (pi_root, p);
416 /* Resolve any fixups using a known pointer. */
419 resolve_fixups (fixup_t *f, void *gp)
432 /* Call here during module reading when we know what pointer to
433 associate with an integer. Any fixups that exist are resolved at
437 associate_integer_pointer (pointer_info *p, void *gp)
439 if (p->u.pointer != NULL)
440 gfc_internal_error ("associate_integer_pointer(): Already associated");
444 resolve_fixups (p->fixup, gp);
450 /* During module reading, given an integer and a pointer to a pointer,
451 either store the pointer from an already-known value or create a
452 fixup structure in order to store things later. Returns zero if
453 the reference has been actually stored, or nonzero if the reference
454 must be fixed later (i.e., associate_integer_pointer must be called
455 sometime later. Returns the pointer_info structure. */
457 static pointer_info *
458 add_fixup (int integer, void *gp)
464 p = get_integer (integer);
466 if (p->integer == 0 || p->u.pointer != NULL)
469 *cp = (char *) p->u.pointer;
478 f->pointer = (void **) gp;
485 /*****************************************************************/
487 /* Parser related subroutines */
489 /* Free the rename list left behind by a USE statement. */
494 gfc_use_rename *next;
496 for (; gfc_rename_list; gfc_rename_list = next)
498 next = gfc_rename_list->next;
499 free (gfc_rename_list);
504 /* Match a USE statement. */
509 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
510 gfc_use_rename *tail = NULL, *new_use;
511 interface_type type, type2;
515 specified_int = false;
516 specified_nonint = false;
518 if (gfc_match (" , ") == MATCH_YES)
520 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
522 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
523 "nature in USE statement at %C") == FAILURE)
526 if (strcmp (module_nature, "intrinsic") == 0)
527 specified_int = true;
530 if (strcmp (module_nature, "non_intrinsic") == 0)
531 specified_nonint = true;
534 gfc_error ("Module nature in USE statement at %C shall "
535 "be either INTRINSIC or NON_INTRINSIC");
542 /* Help output a better error message than "Unclassifiable
544 gfc_match (" %n", module_nature);
545 if (strcmp (module_nature, "intrinsic") == 0
546 || strcmp (module_nature, "non_intrinsic") == 0)
547 gfc_error ("\"::\" was expected after module nature at %C "
548 "but was not found");
554 m = gfc_match (" ::");
555 if (m == MATCH_YES &&
556 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
557 "\"USE :: module\" at %C") == FAILURE)
562 m = gfc_match ("% ");
568 use_locus = gfc_current_locus;
570 m = gfc_match_name (module_name);
577 if (gfc_match_eos () == MATCH_YES)
579 if (gfc_match_char (',') != MATCH_YES)
582 if (gfc_match (" only :") == MATCH_YES)
585 if (gfc_match_eos () == MATCH_YES)
590 /* Get a new rename struct and add it to the rename list. */
591 new_use = gfc_get_use_rename ();
592 new_use->where = gfc_current_locus;
595 if (gfc_rename_list == NULL)
596 gfc_rename_list = new_use;
598 tail->next = new_use;
601 /* See what kind of interface we're dealing with. Assume it is
603 new_use->op = INTRINSIC_NONE;
604 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
609 case INTERFACE_NAMELESS:
610 gfc_error ("Missing generic specification in USE statement at %C");
613 case INTERFACE_USER_OP:
614 case INTERFACE_GENERIC:
615 m = gfc_match (" =>");
617 if (type == INTERFACE_USER_OP && m == MATCH_YES
618 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
619 "operators in USE statements at %C")
623 if (type == INTERFACE_USER_OP)
624 new_use->op = INTRINSIC_USER;
629 strcpy (new_use->use_name, name);
632 strcpy (new_use->local_name, name);
633 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
638 if (m == MATCH_ERROR)
646 strcpy (new_use->local_name, name);
648 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
653 if (m == MATCH_ERROR)
657 if (strcmp (new_use->use_name, module_name) == 0
658 || strcmp (new_use->local_name, module_name) == 0)
660 gfc_error ("The name '%s' at %C has already been used as "
661 "an external module name.", module_name);
666 case INTERFACE_INTRINSIC_OP:
674 if (gfc_match_eos () == MATCH_YES)
676 if (gfc_match_char (',') != MATCH_YES)
683 gfc_syntax_error (ST_USE);
691 /* Given a name and a number, inst, return the inst name
692 under which to load this symbol. Returns NULL if this
693 symbol shouldn't be loaded. If inst is zero, returns
694 the number of instances of this name. If interface is
695 true, a user-defined operator is sought, otherwise only
696 non-operators are sought. */
699 find_use_name_n (const char *name, int *inst, bool interface)
705 for (u = gfc_rename_list; u; u = u->next)
707 if (strcmp (u->use_name, name) != 0
708 || (u->op == INTRINSIC_USER && !interface)
709 || (u->op != INTRINSIC_USER && interface))
722 return only_flag ? NULL : name;
726 return (u->local_name[0] != '\0') ? u->local_name : name;
730 /* Given a name, return the name under which to load this symbol.
731 Returns NULL if this symbol shouldn't be loaded. */
734 find_use_name (const char *name, bool interface)
737 return find_use_name_n (name, &i, interface);
741 /* Given a real name, return the number of use names associated with it. */
744 number_use_names (const char *name, bool interface)
747 find_use_name_n (name, &i, interface);
752 /* Try to find the operator in the current list. */
754 static gfc_use_rename *
755 find_use_operator (gfc_intrinsic_op op)
759 for (u = gfc_rename_list; u; u = u->next)
767 /*****************************************************************/
769 /* The next couple of subroutines maintain a tree used to avoid a
770 brute-force search for a combination of true name and module name.
771 While symtree names, the name that a particular symbol is known by
772 can changed with USE statements, we still have to keep track of the
773 true names to generate the correct reference, and also avoid
774 loading the same real symbol twice in a program unit.
776 When we start reading, the true name tree is built and maintained
777 as symbols are read. The tree is searched as we load new symbols
778 to see if it already exists someplace in the namespace. */
780 typedef struct true_name
782 BBT_HEADER (true_name);
787 static true_name *true_name_root;
790 /* Compare two true_name structures. */
793 compare_true_names (void *_t1, void *_t2)
798 t1 = (true_name *) _t1;
799 t2 = (true_name *) _t2;
801 c = ((t1->sym->module > t2->sym->module)
802 - (t1->sym->module < t2->sym->module));
806 return strcmp (t1->sym->name, t2->sym->name);
810 /* Given a true name, search the true name tree to see if it exists
811 within the main namespace. */
814 find_true_name (const char *name, const char *module)
820 sym.name = gfc_get_string (name);
822 sym.module = gfc_get_string (module);
830 c = compare_true_names ((void *) (&t), (void *) p);
834 p = (c < 0) ? p->left : p->right;
841 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
844 add_true_name (gfc_symbol *sym)
848 t = XCNEW (true_name);
851 gfc_insert_bbt (&true_name_root, t, compare_true_names);
855 /* Recursive function to build the initial true name tree by
856 recursively traversing the current namespace. */
859 build_tnt (gfc_symtree *st)
864 build_tnt (st->left);
865 build_tnt (st->right);
867 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
870 add_true_name (st->n.sym);
874 /* Initialize the true name tree with the current namespace. */
877 init_true_name_tree (void)
879 true_name_root = NULL;
880 build_tnt (gfc_current_ns->sym_root);
884 /* Recursively free a true name tree node. */
887 free_true_name (true_name *t)
891 free_true_name (t->left);
892 free_true_name (t->right);
898 /*****************************************************************/
900 /* Module reading and writing. */
904 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
908 static atom_type last_atom;
911 /* The name buffer must be at least as long as a symbol name. Right
912 now it's not clear how we're going to store numeric constants--
913 probably as a hexadecimal string, since this will allow the exact
914 number to be preserved (this can't be done by a decimal
915 representation). Worry about that later. TODO! */
917 #define MAX_ATOM_SIZE 100
920 static char *atom_string, atom_name[MAX_ATOM_SIZE];
923 /* Report problems with a module. Error reporting is not very
924 elaborate, since this sorts of errors shouldn't really happen.
925 This subroutine never returns. */
927 static void bad_module (const char *) ATTRIBUTE_NORETURN;
930 bad_module (const char *msgid)
937 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
938 module_name, module_line, module_column, msgid);
941 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
942 module_name, module_line, module_column, msgid);
945 gfc_fatal_error ("Module %s at line %d column %d: %s",
946 module_name, module_line, module_column, msgid);
952 /* Set the module's input pointer. */
955 set_module_locus (module_locus *m)
957 module_column = m->column;
958 module_line = m->line;
959 fsetpos (module_fp, &m->pos);
963 /* Get the module's input pointer so that we can restore it later. */
966 get_module_locus (module_locus *m)
968 m->column = module_column;
969 m->line = module_line;
970 fgetpos (module_fp, &m->pos);
974 /* Get the next character in the module, updating our reckoning of
982 c = getc (module_fp);
985 bad_module ("Unexpected EOF");
998 /* Parse a string constant. The delimiter is guaranteed to be a
1008 get_module_locus (&start);
1012 /* See how long the string is. */
1017 bad_module ("Unexpected end of module in string constant");
1035 set_module_locus (&start);
1037 atom_string = p = XCNEWVEC (char, len + 1);
1039 for (; len > 0; len--)
1043 module_char (); /* Guaranteed to be another \'. */
1047 module_char (); /* Terminating \'. */
1048 *p = '\0'; /* C-style string for debug purposes. */
1052 /* Parse a small integer. */
1055 parse_integer (int c)
1063 get_module_locus (&m);
1069 atom_int = 10 * atom_int + c - '0';
1070 if (atom_int > 99999999)
1071 bad_module ("Integer overflow");
1074 set_module_locus (&m);
1092 get_module_locus (&m);
1097 if (!ISALNUM (c) && c != '_' && c != '-')
1101 if (++len > GFC_MAX_SYMBOL_LEN)
1102 bad_module ("Name too long");
1107 fseek (module_fp, -1, SEEK_CUR);
1108 module_column = m.column + len - 1;
1115 /* Read the next atom in the module's input stream. */
1126 while (c == ' ' || c == '\r' || c == '\n');
1151 return ATOM_INTEGER;
1209 bad_module ("Bad name");
1216 /* Peek at the next atom on the input. */
1224 get_module_locus (&m);
1227 if (a == ATOM_STRING)
1230 set_module_locus (&m);
1235 /* Read the next atom from the input, requiring that it be a
1239 require_atom (atom_type type)
1245 get_module_locus (&m);
1253 p = _("Expected name");
1256 p = _("Expected left parenthesis");
1259 p = _("Expected right parenthesis");
1262 p = _("Expected integer");
1265 p = _("Expected string");
1268 gfc_internal_error ("require_atom(): bad atom type required");
1271 set_module_locus (&m);
1277 /* Given a pointer to an mstring array, require that the current input
1278 be one of the strings in the array. We return the enum value. */
1281 find_enum (const mstring *m)
1285 i = gfc_string2code (m, atom_name);
1289 bad_module ("find_enum(): Enum not found");
1295 /**************** Module output subroutines ***************************/
1297 /* Output a character to a module file. */
1300 write_char (char out)
1302 if (putc (out, module_fp) == EOF)
1303 gfc_fatal_error ("Error writing modules file: %s", xstrerror (errno));
1305 /* Add this to our MD5. */
1306 md5_process_bytes (&out, sizeof (out), &ctx);
1318 /* Write an atom to a module. The line wrapping isn't perfect, but it
1319 should work most of the time. This isn't that big of a deal, since
1320 the file really isn't meant to be read by people anyway. */
1323 write_atom (atom_type atom, const void *v)
1333 p = (const char *) v;
1345 i = *((const int *) v);
1347 gfc_internal_error ("write_atom(): Writing negative integer");
1349 sprintf (buffer, "%d", i);
1354 gfc_internal_error ("write_atom(): Trying to write dab atom");
1358 if(p == NULL || *p == '\0')
1363 if (atom != ATOM_RPAREN)
1365 if (module_column + len > 72)
1370 if (last_atom != ATOM_LPAREN && module_column != 1)
1375 if (atom == ATOM_STRING)
1378 while (p != NULL && *p)
1380 if (atom == ATOM_STRING && *p == '\'')
1385 if (atom == ATOM_STRING)
1393 /***************** Mid-level I/O subroutines *****************/
1395 /* These subroutines let their caller read or write atoms without
1396 caring about which of the two is actually happening. This lets a
1397 subroutine concentrate on the actual format of the data being
1400 static void mio_expr (gfc_expr **);
1401 pointer_info *mio_symbol_ref (gfc_symbol **);
1402 pointer_info *mio_interface_rest (gfc_interface **);
1403 static void mio_symtree_ref (gfc_symtree **);
1405 /* Read or write an enumerated value. On writing, we return the input
1406 value for the convenience of callers. We avoid using an integer
1407 pointer because enums are sometimes inside bitfields. */
1410 mio_name (int t, const mstring *m)
1412 if (iomode == IO_OUTPUT)
1413 write_atom (ATOM_NAME, gfc_code2string (m, t));
1416 require_atom (ATOM_NAME);
1423 /* Specialization of mio_name. */
1425 #define DECL_MIO_NAME(TYPE) \
1426 static inline TYPE \
1427 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1429 return (TYPE) mio_name ((int) t, m); \
1431 #define MIO_NAME(TYPE) mio_name_##TYPE
1436 if (iomode == IO_OUTPUT)
1437 write_atom (ATOM_LPAREN, NULL);
1439 require_atom (ATOM_LPAREN);
1446 if (iomode == IO_OUTPUT)
1447 write_atom (ATOM_RPAREN, NULL);
1449 require_atom (ATOM_RPAREN);
1454 mio_integer (int *ip)
1456 if (iomode == IO_OUTPUT)
1457 write_atom (ATOM_INTEGER, ip);
1460 require_atom (ATOM_INTEGER);
1466 /* Read or write a gfc_intrinsic_op value. */
1469 mio_intrinsic_op (gfc_intrinsic_op* op)
1471 /* FIXME: Would be nicer to do this via the operators symbolic name. */
1472 if (iomode == IO_OUTPUT)
1474 int converted = (int) *op;
1475 write_atom (ATOM_INTEGER, &converted);
1479 require_atom (ATOM_INTEGER);
1480 *op = (gfc_intrinsic_op) atom_int;
1485 /* Read or write a character pointer that points to a string on the heap. */
1488 mio_allocated_string (const char *s)
1490 if (iomode == IO_OUTPUT)
1492 write_atom (ATOM_STRING, s);
1497 require_atom (ATOM_STRING);
1503 /* Functions for quoting and unquoting strings. */
1506 quote_string (const gfc_char_t *s, const size_t slength)
1508 const gfc_char_t *p;
1512 /* Calculate the length we'll need: a backslash takes two ("\\"),
1513 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1514 for (p = s, i = 0; i < slength; p++, i++)
1518 else if (!gfc_wide_is_printable (*p))
1524 q = res = XCNEWVEC (char, len + 1);
1525 for (p = s, i = 0; i < slength; p++, i++)
1528 *q++ = '\\', *q++ = '\\';
1529 else if (!gfc_wide_is_printable (*p))
1531 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1532 (unsigned HOST_WIDE_INT) *p);
1536 *q++ = (unsigned char) *p;
1544 unquote_string (const char *s)
1550 for (p = s, len = 0; *p; p++, len++)
1557 else if (p[1] == 'U')
1558 p += 9; /* That is a "\U????????". */
1560 gfc_internal_error ("unquote_string(): got bad string");
1563 res = gfc_get_wide_string (len + 1);
1564 for (i = 0, p = s; i < len; i++, p++)
1569 res[i] = (unsigned char) *p;
1570 else if (p[1] == '\\')
1572 res[i] = (unsigned char) '\\';
1577 /* We read the 8-digits hexadecimal constant that follows. */
1582 gcc_assert (p[1] == 'U');
1583 for (j = 0; j < 8; j++)
1586 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1600 /* Read or write a character pointer that points to a wide string on the
1601 heap, performing quoting/unquoting of nonprintable characters using the
1602 form \U???????? (where each ? is a hexadecimal digit).
1603 Length is the length of the string, only known and used in output mode. */
1605 static const gfc_char_t *
1606 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1608 if (iomode == IO_OUTPUT)
1610 char *quoted = quote_string (s, length);
1611 write_atom (ATOM_STRING, quoted);
1617 gfc_char_t *unquoted;
1619 require_atom (ATOM_STRING);
1620 unquoted = unquote_string (atom_string);
1627 /* Read or write a string that is in static memory. */
1630 mio_pool_string (const char **stringp)
1632 /* TODO: one could write the string only once, and refer to it via a
1635 /* As a special case we have to deal with a NULL string. This
1636 happens for the 'module' member of 'gfc_symbol's that are not in a
1637 module. We read / write these as the empty string. */
1638 if (iomode == IO_OUTPUT)
1640 const char *p = *stringp == NULL ? "" : *stringp;
1641 write_atom (ATOM_STRING, p);
1645 require_atom (ATOM_STRING);
1646 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1652 /* Read or write a string that is inside of some already-allocated
1656 mio_internal_string (char *string)
1658 if (iomode == IO_OUTPUT)
1659 write_atom (ATOM_STRING, string);
1662 require_atom (ATOM_STRING);
1663 strcpy (string, atom_string);
1670 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1671 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1672 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1673 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1674 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE,
1675 AB_ALLOC_COMP, AB_POINTER_COMP, AB_PROC_POINTER_COMP, AB_PRIVATE_COMP,
1676 AB_VALUE, AB_VOLATILE, AB_PROTECTED, AB_LOCK_COMP,
1677 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1678 AB_IS_CLASS, AB_PROCEDURE, AB_PROC_POINTER, AB_ASYNCHRONOUS, AB_CODIMENSION,
1679 AB_COARRAY_COMP, AB_VTYPE, AB_VTAB, AB_CONTIGUOUS, AB_CLASS_POINTER,
1684 static const mstring attr_bits[] =
1686 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1687 minit ("ASYNCHRONOUS", AB_ASYNCHRONOUS),
1688 minit ("DIMENSION", AB_DIMENSION),
1689 minit ("CODIMENSION", AB_CODIMENSION),
1690 minit ("CONTIGUOUS", AB_CONTIGUOUS),
1691 minit ("EXTERNAL", AB_EXTERNAL),
1692 minit ("INTRINSIC", AB_INTRINSIC),
1693 minit ("OPTIONAL", AB_OPTIONAL),
1694 minit ("POINTER", AB_POINTER),
1695 minit ("VOLATILE", AB_VOLATILE),
1696 minit ("TARGET", AB_TARGET),
1697 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1698 minit ("DUMMY", AB_DUMMY),
1699 minit ("RESULT", AB_RESULT),
1700 minit ("DATA", AB_DATA),
1701 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1702 minit ("IN_COMMON", AB_IN_COMMON),
1703 minit ("FUNCTION", AB_FUNCTION),
1704 minit ("SUBROUTINE", AB_SUBROUTINE),
1705 minit ("SEQUENCE", AB_SEQUENCE),
1706 minit ("ELEMENTAL", AB_ELEMENTAL),
1707 minit ("PURE", AB_PURE),
1708 minit ("RECURSIVE", AB_RECURSIVE),
1709 minit ("GENERIC", AB_GENERIC),
1710 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1711 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1712 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1713 minit ("IS_BIND_C", AB_IS_BIND_C),
1714 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1715 minit ("IS_ISO_C", AB_IS_ISO_C),
1716 minit ("VALUE", AB_VALUE),
1717 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1718 minit ("COARRAY_COMP", AB_COARRAY_COMP),
1719 minit ("LOCK_COMP", AB_LOCK_COMP),
1720 minit ("POINTER_COMP", AB_POINTER_COMP),
1721 minit ("PROC_POINTER_COMP", AB_PROC_POINTER_COMP),
1722 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1723 minit ("ZERO_COMP", AB_ZERO_COMP),
1724 minit ("PROTECTED", AB_PROTECTED),
1725 minit ("ABSTRACT", AB_ABSTRACT),
1726 minit ("IS_CLASS", AB_IS_CLASS),
1727 minit ("PROCEDURE", AB_PROCEDURE),
1728 minit ("PROC_POINTER", AB_PROC_POINTER),
1729 minit ("VTYPE", AB_VTYPE),
1730 minit ("VTAB", AB_VTAB),
1731 minit ("CLASS_POINTER", AB_CLASS_POINTER),
1732 minit ("IMPLICIT_PURE", AB_IMPLICIT_PURE),
1736 /* For binding attributes. */
1737 static const mstring binding_passing[] =
1740 minit ("NOPASS", 1),
1743 static const mstring binding_overriding[] =
1745 minit ("OVERRIDABLE", 0),
1746 minit ("NON_OVERRIDABLE", 1),
1747 minit ("DEFERRED", 2),
1750 static const mstring binding_generic[] =
1752 minit ("SPECIFIC", 0),
1753 minit ("GENERIC", 1),
1756 static const mstring binding_ppc[] =
1758 minit ("NO_PPC", 0),
1763 /* Specialization of mio_name. */
1764 DECL_MIO_NAME (ab_attribute)
1765 DECL_MIO_NAME (ar_type)
1766 DECL_MIO_NAME (array_type)
1768 DECL_MIO_NAME (expr_t)
1769 DECL_MIO_NAME (gfc_access)
1770 DECL_MIO_NAME (gfc_intrinsic_op)
1771 DECL_MIO_NAME (ifsrc)
1772 DECL_MIO_NAME (save_state)
1773 DECL_MIO_NAME (procedure_type)
1774 DECL_MIO_NAME (ref_type)
1775 DECL_MIO_NAME (sym_flavor)
1776 DECL_MIO_NAME (sym_intent)
1777 #undef DECL_MIO_NAME
1779 /* Symbol attributes are stored in list with the first three elements
1780 being the enumerated fields, while the remaining elements (if any)
1781 indicate the individual attribute bits. The access field is not
1782 saved-- it controls what symbols are exported when a module is
1786 mio_symbol_attribute (symbol_attribute *attr)
1789 unsigned ext_attr,extension_level;
1793 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1794 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1795 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1796 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1797 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1799 ext_attr = attr->ext_attr;
1800 mio_integer ((int *) &ext_attr);
1801 attr->ext_attr = ext_attr;
1803 extension_level = attr->extension;
1804 mio_integer ((int *) &extension_level);
1805 attr->extension = extension_level;
1807 if (iomode == IO_OUTPUT)
1809 if (attr->allocatable)
1810 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1811 if (attr->asynchronous)
1812 MIO_NAME (ab_attribute) (AB_ASYNCHRONOUS, attr_bits);
1813 if (attr->dimension)
1814 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1815 if (attr->codimension)
1816 MIO_NAME (ab_attribute) (AB_CODIMENSION, attr_bits);
1817 if (attr->contiguous)
1818 MIO_NAME (ab_attribute) (AB_CONTIGUOUS, attr_bits);
1820 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1821 if (attr->intrinsic)
1822 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1824 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1826 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1827 if (attr->class_pointer)
1828 MIO_NAME (ab_attribute) (AB_CLASS_POINTER, attr_bits);
1829 if (attr->is_protected)
1830 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1832 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1833 if (attr->volatile_)
1834 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1836 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1837 if (attr->threadprivate)
1838 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1840 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1842 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1843 /* We deliberately don't preserve the "entry" flag. */
1846 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1847 if (attr->in_namelist)
1848 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1849 if (attr->in_common)
1850 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1853 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1854 if (attr->subroutine)
1855 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1857 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1859 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1862 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1863 if (attr->elemental)
1864 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1866 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1867 if (attr->implicit_pure)
1868 MIO_NAME (ab_attribute) (AB_IMPLICIT_PURE, attr_bits);
1869 if (attr->recursive)
1870 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1871 if (attr->always_explicit)
1872 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1873 if (attr->cray_pointer)
1874 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1875 if (attr->cray_pointee)
1876 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1877 if (attr->is_bind_c)
1878 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1879 if (attr->is_c_interop)
1880 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1882 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1883 if (attr->alloc_comp)
1884 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1885 if (attr->pointer_comp)
1886 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1887 if (attr->proc_pointer_comp)
1888 MIO_NAME (ab_attribute) (AB_PROC_POINTER_COMP, attr_bits);
1889 if (attr->private_comp)
1890 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1891 if (attr->coarray_comp)
1892 MIO_NAME (ab_attribute) (AB_COARRAY_COMP, attr_bits);
1893 if (attr->lock_comp)
1894 MIO_NAME (ab_attribute) (AB_LOCK_COMP, attr_bits);
1895 if (attr->zero_comp)
1896 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1898 MIO_NAME (ab_attribute) (AB_IS_CLASS, attr_bits);
1899 if (attr->procedure)
1900 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1901 if (attr->proc_pointer)
1902 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1904 MIO_NAME (ab_attribute) (AB_VTYPE, attr_bits);
1906 MIO_NAME (ab_attribute) (AB_VTAB, attr_bits);
1916 if (t == ATOM_RPAREN)
1919 bad_module ("Expected attribute bit name");
1921 switch ((ab_attribute) find_enum (attr_bits))
1923 case AB_ALLOCATABLE:
1924 attr->allocatable = 1;
1926 case AB_ASYNCHRONOUS:
1927 attr->asynchronous = 1;
1930 attr->dimension = 1;
1932 case AB_CODIMENSION:
1933 attr->codimension = 1;
1936 attr->contiguous = 1;
1942 attr->intrinsic = 1;
1950 case AB_CLASS_POINTER:
1951 attr->class_pointer = 1;
1954 attr->is_protected = 1;
1960 attr->volatile_ = 1;
1965 case AB_THREADPRIVATE:
1966 attr->threadprivate = 1;
1977 case AB_IN_NAMELIST:
1978 attr->in_namelist = 1;
1981 attr->in_common = 1;
1987 attr->subroutine = 1;
1999 attr->elemental = 1;
2004 case AB_IMPLICIT_PURE:
2005 attr->implicit_pure = 1;
2008 attr->recursive = 1;
2010 case AB_ALWAYS_EXPLICIT:
2011 attr->always_explicit = 1;
2013 case AB_CRAY_POINTER:
2014 attr->cray_pointer = 1;
2016 case AB_CRAY_POINTEE:
2017 attr->cray_pointee = 1;
2020 attr->is_bind_c = 1;
2022 case AB_IS_C_INTEROP:
2023 attr->is_c_interop = 1;
2029 attr->alloc_comp = 1;
2031 case AB_COARRAY_COMP:
2032 attr->coarray_comp = 1;
2035 attr->lock_comp = 1;
2037 case AB_POINTER_COMP:
2038 attr->pointer_comp = 1;
2040 case AB_PROC_POINTER_COMP:
2041 attr->proc_pointer_comp = 1;
2043 case AB_PRIVATE_COMP:
2044 attr->private_comp = 1;
2047 attr->zero_comp = 1;
2053 attr->procedure = 1;
2055 case AB_PROC_POINTER:
2056 attr->proc_pointer = 1;
2070 static const mstring bt_types[] = {
2071 minit ("INTEGER", BT_INTEGER),
2072 minit ("REAL", BT_REAL),
2073 minit ("COMPLEX", BT_COMPLEX),
2074 minit ("LOGICAL", BT_LOGICAL),
2075 minit ("CHARACTER", BT_CHARACTER),
2076 minit ("DERIVED", BT_DERIVED),
2077 minit ("CLASS", BT_CLASS),
2078 minit ("PROCEDURE", BT_PROCEDURE),
2079 minit ("UNKNOWN", BT_UNKNOWN),
2080 minit ("VOID", BT_VOID),
2086 mio_charlen (gfc_charlen **clp)
2092 if (iomode == IO_OUTPUT)
2096 mio_expr (&cl->length);
2100 if (peek_atom () != ATOM_RPAREN)
2102 cl = gfc_new_charlen (gfc_current_ns, NULL);
2103 mio_expr (&cl->length);
2112 /* See if a name is a generated name. */
2115 check_unique_name (const char *name)
2117 return *name == '@';
2122 mio_typespec (gfc_typespec *ts)
2126 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2128 if (ts->type != BT_DERIVED && ts->type != BT_CLASS)
2129 mio_integer (&ts->kind);
2131 mio_symbol_ref (&ts->u.derived);
2133 mio_symbol_ref (&ts->interface);
2135 /* Add info for C interop and is_iso_c. */
2136 mio_integer (&ts->is_c_interop);
2137 mio_integer (&ts->is_iso_c);
2139 /* If the typespec is for an identifier either from iso_c_binding, or
2140 a constant that was initialized to an identifier from it, use the
2141 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2143 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2145 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2147 if (ts->type != BT_CHARACTER)
2149 /* ts->u.cl is only valid for BT_CHARACTER. */
2154 mio_charlen (&ts->u.cl);
2156 /* So as not to disturb the existing API, use an ATOM_NAME to
2157 transmit deferred characteristic for characters (F2003). */
2158 if (iomode == IO_OUTPUT)
2160 if (ts->type == BT_CHARACTER && ts->deferred)
2161 write_atom (ATOM_NAME, "DEFERRED_CL");
2163 else if (peek_atom () != ATOM_RPAREN)
2165 if (parse_atom () != ATOM_NAME)
2166 bad_module ("Expected string");
2174 static const mstring array_spec_types[] = {
2175 minit ("EXPLICIT", AS_EXPLICIT),
2176 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2177 minit ("DEFERRED", AS_DEFERRED),
2178 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2184 mio_array_spec (gfc_array_spec **asp)
2191 if (iomode == IO_OUTPUT)
2199 if (peek_atom () == ATOM_RPAREN)
2205 *asp = as = gfc_get_array_spec ();
2208 mio_integer (&as->rank);
2209 mio_integer (&as->corank);
2210 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2212 if (iomode == IO_INPUT && as->corank)
2213 as->cotype = (as->type == AS_DEFERRED) ? AS_DEFERRED : AS_EXPLICIT;
2215 for (i = 0; i < as->rank + as->corank; i++)
2217 mio_expr (&as->lower[i]);
2218 mio_expr (&as->upper[i]);
2226 /* Given a pointer to an array reference structure (which lives in a
2227 gfc_ref structure), find the corresponding array specification
2228 structure. Storing the pointer in the ref structure doesn't quite
2229 work when loading from a module. Generating code for an array
2230 reference also needs more information than just the array spec. */
2232 static const mstring array_ref_types[] = {
2233 minit ("FULL", AR_FULL),
2234 minit ("ELEMENT", AR_ELEMENT),
2235 minit ("SECTION", AR_SECTION),
2241 mio_array_ref (gfc_array_ref *ar)
2246 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2247 mio_integer (&ar->dimen);
2255 for (i = 0; i < ar->dimen; i++)
2256 mio_expr (&ar->start[i]);
2261 for (i = 0; i < ar->dimen; i++)
2263 mio_expr (&ar->start[i]);
2264 mio_expr (&ar->end[i]);
2265 mio_expr (&ar->stride[i]);
2271 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2274 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2275 we can't call mio_integer directly. Instead loop over each element
2276 and cast it to/from an integer. */
2277 if (iomode == IO_OUTPUT)
2279 for (i = 0; i < ar->dimen; i++)
2281 int tmp = (int)ar->dimen_type[i];
2282 write_atom (ATOM_INTEGER, &tmp);
2287 for (i = 0; i < ar->dimen; i++)
2289 require_atom (ATOM_INTEGER);
2290 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2294 if (iomode == IO_INPUT)
2296 ar->where = gfc_current_locus;
2298 for (i = 0; i < ar->dimen; i++)
2299 ar->c_where[i] = gfc_current_locus;
2306 /* Saves or restores a pointer. The pointer is converted back and
2307 forth from an integer. We return the pointer_info pointer so that
2308 the caller can take additional action based on the pointer type. */
2310 static pointer_info *
2311 mio_pointer_ref (void *gp)
2315 if (iomode == IO_OUTPUT)
2317 p = get_pointer (*((char **) gp));
2318 write_atom (ATOM_INTEGER, &p->integer);
2322 require_atom (ATOM_INTEGER);
2323 p = add_fixup (atom_int, gp);
2330 /* Save and load references to components that occur within
2331 expressions. We have to describe these references by a number and
2332 by name. The number is necessary for forward references during
2333 reading, and the name is necessary if the symbol already exists in
2334 the namespace and is not loaded again. */
2337 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2339 char name[GFC_MAX_SYMBOL_LEN + 1];
2343 p = mio_pointer_ref (cp);
2344 if (p->type == P_UNKNOWN)
2345 p->type = P_COMPONENT;
2347 if (iomode == IO_OUTPUT)
2348 mio_pool_string (&(*cp)->name);
2351 mio_internal_string (name);
2353 if (sym && sym->attr.is_class)
2354 sym = sym->components->ts.u.derived;
2356 /* It can happen that a component reference can be read before the
2357 associated derived type symbol has been loaded. Return now and
2358 wait for a later iteration of load_needed. */
2362 if (sym->components != NULL && p->u.pointer == NULL)
2364 /* Symbol already loaded, so search by name. */
2365 q = gfc_find_component (sym, name, true, true);
2368 associate_integer_pointer (p, q);
2371 /* Make sure this symbol will eventually be loaded. */
2372 p = find_pointer2 (sym);
2373 if (p->u.rsym.state == UNUSED)
2374 p->u.rsym.state = NEEDED;
2379 static void mio_namespace_ref (gfc_namespace **nsp);
2380 static void mio_formal_arglist (gfc_formal_arglist **formal);
2381 static void mio_typebound_proc (gfc_typebound_proc** proc);
2384 mio_component (gfc_component *c, int vtype)
2388 gfc_formal_arglist *formal;
2392 if (iomode == IO_OUTPUT)
2394 p = get_pointer (c);
2395 mio_integer (&p->integer);
2400 p = get_integer (n);
2401 associate_integer_pointer (p, c);
2404 if (p->type == P_UNKNOWN)
2405 p->type = P_COMPONENT;
2407 mio_pool_string (&c->name);
2408 mio_typespec (&c->ts);
2409 mio_array_spec (&c->as);
2411 mio_symbol_attribute (&c->attr);
2412 if (c->ts.type == BT_CLASS)
2413 c->attr.class_ok = 1;
2414 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2417 mio_expr (&c->initializer);
2419 if (c->attr.proc_pointer)
2421 if (iomode == IO_OUTPUT)
2424 while (formal && !formal->sym)
2425 formal = formal->next;
2428 mio_namespace_ref (&formal->sym->ns);
2430 mio_namespace_ref (&c->formal_ns);
2434 mio_namespace_ref (&c->formal_ns);
2435 /* TODO: if (c->formal_ns)
2437 c->formal_ns->proc_name = c;
2442 mio_formal_arglist (&c->formal);
2444 mio_typebound_proc (&c->tb);
2452 mio_component_list (gfc_component **cp, int vtype)
2454 gfc_component *c, *tail;
2458 if (iomode == IO_OUTPUT)
2460 for (c = *cp; c; c = c->next)
2461 mio_component (c, vtype);
2470 if (peek_atom () == ATOM_RPAREN)
2473 c = gfc_get_component ();
2474 mio_component (c, vtype);
2490 mio_actual_arg (gfc_actual_arglist *a)
2493 mio_pool_string (&a->name);
2494 mio_expr (&a->expr);
2500 mio_actual_arglist (gfc_actual_arglist **ap)
2502 gfc_actual_arglist *a, *tail;
2506 if (iomode == IO_OUTPUT)
2508 for (a = *ap; a; a = a->next)
2518 if (peek_atom () != ATOM_LPAREN)
2521 a = gfc_get_actual_arglist ();
2537 /* Read and write formal argument lists. */
2540 mio_formal_arglist (gfc_formal_arglist **formal)
2542 gfc_formal_arglist *f, *tail;
2546 if (iomode == IO_OUTPUT)
2548 for (f = *formal; f; f = f->next)
2549 mio_symbol_ref (&f->sym);
2553 *formal = tail = NULL;
2555 while (peek_atom () != ATOM_RPAREN)
2557 f = gfc_get_formal_arglist ();
2558 mio_symbol_ref (&f->sym);
2560 if (*formal == NULL)
2573 /* Save or restore a reference to a symbol node. */
2576 mio_symbol_ref (gfc_symbol **symp)
2580 p = mio_pointer_ref (symp);
2581 if (p->type == P_UNKNOWN)
2584 if (iomode == IO_OUTPUT)
2586 if (p->u.wsym.state == UNREFERENCED)
2587 p->u.wsym.state = NEEDS_WRITE;
2591 if (p->u.rsym.state == UNUSED)
2592 p->u.rsym.state = NEEDED;
2598 /* Save or restore a reference to a symtree node. */
2601 mio_symtree_ref (gfc_symtree **stp)
2606 if (iomode == IO_OUTPUT)
2607 mio_symbol_ref (&(*stp)->n.sym);
2610 require_atom (ATOM_INTEGER);
2611 p = get_integer (atom_int);
2613 /* An unused equivalence member; make a symbol and a symtree
2615 if (in_load_equiv && p->u.rsym.symtree == NULL)
2617 /* Since this is not used, it must have a unique name. */
2618 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2620 /* Make the symbol. */
2621 if (p->u.rsym.sym == NULL)
2623 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2625 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2628 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2629 p->u.rsym.symtree->n.sym->refs++;
2630 p->u.rsym.referenced = 1;
2632 /* If the symbol is PRIVATE and in COMMON, load_commons will
2633 generate a fixup symbol, which must be associated. */
2635 resolve_fixups (p->fixup, p->u.rsym.sym);
2639 if (p->type == P_UNKNOWN)
2642 if (p->u.rsym.state == UNUSED)
2643 p->u.rsym.state = NEEDED;
2645 if (p->u.rsym.symtree != NULL)
2647 *stp = p->u.rsym.symtree;
2651 f = XCNEW (fixup_t);
2653 f->next = p->u.rsym.stfixup;
2654 p->u.rsym.stfixup = f;
2656 f->pointer = (void **) stp;
2663 mio_iterator (gfc_iterator **ip)
2669 if (iomode == IO_OUTPUT)
2676 if (peek_atom () == ATOM_RPAREN)
2682 *ip = gfc_get_iterator ();
2687 mio_expr (&iter->var);
2688 mio_expr (&iter->start);
2689 mio_expr (&iter->end);
2690 mio_expr (&iter->step);
2698 mio_constructor (gfc_constructor_base *cp)
2704 if (iomode == IO_OUTPUT)
2706 for (c = gfc_constructor_first (*cp); c; c = gfc_constructor_next (c))
2709 mio_expr (&c->expr);
2710 mio_iterator (&c->iterator);
2716 while (peek_atom () != ATOM_RPAREN)
2718 c = gfc_constructor_append_expr (cp, NULL, NULL);
2721 mio_expr (&c->expr);
2722 mio_iterator (&c->iterator);
2731 static const mstring ref_types[] = {
2732 minit ("ARRAY", REF_ARRAY),
2733 minit ("COMPONENT", REF_COMPONENT),
2734 minit ("SUBSTRING", REF_SUBSTRING),
2740 mio_ref (gfc_ref **rp)
2747 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2752 mio_array_ref (&r->u.ar);
2756 mio_symbol_ref (&r->u.c.sym);
2757 mio_component_ref (&r->u.c.component, r->u.c.sym);
2761 mio_expr (&r->u.ss.start);
2762 mio_expr (&r->u.ss.end);
2763 mio_charlen (&r->u.ss.length);
2772 mio_ref_list (gfc_ref **rp)
2774 gfc_ref *ref, *head, *tail;
2778 if (iomode == IO_OUTPUT)
2780 for (ref = *rp; ref; ref = ref->next)
2787 while (peek_atom () != ATOM_RPAREN)
2790 head = tail = gfc_get_ref ();
2793 tail->next = gfc_get_ref ();
2807 /* Read and write an integer value. */
2810 mio_gmp_integer (mpz_t *integer)
2814 if (iomode == IO_INPUT)
2816 if (parse_atom () != ATOM_STRING)
2817 bad_module ("Expected integer string");
2819 mpz_init (*integer);
2820 if (mpz_set_str (*integer, atom_string, 10))
2821 bad_module ("Error converting integer");
2827 p = mpz_get_str (NULL, 10, *integer);
2828 write_atom (ATOM_STRING, p);
2835 mio_gmp_real (mpfr_t *real)
2840 if (iomode == IO_INPUT)
2842 if (parse_atom () != ATOM_STRING)
2843 bad_module ("Expected real string");
2846 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2851 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2853 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2855 write_atom (ATOM_STRING, p);
2860 atom_string = XCNEWVEC (char, strlen (p) + 20);
2862 sprintf (atom_string, "0.%s@%ld", p, exponent);
2864 /* Fix negative numbers. */
2865 if (atom_string[2] == '-')
2867 atom_string[0] = '-';
2868 atom_string[1] = '0';
2869 atom_string[2] = '.';
2872 write_atom (ATOM_STRING, atom_string);
2880 /* Save and restore the shape of an array constructor. */
2883 mio_shape (mpz_t **pshape, int rank)
2889 /* A NULL shape is represented by (). */
2892 if (iomode == IO_OUTPUT)
2904 if (t == ATOM_RPAREN)
2911 shape = gfc_get_shape (rank);
2915 for (n = 0; n < rank; n++)
2916 mio_gmp_integer (&shape[n]);
2922 static const mstring expr_types[] = {
2923 minit ("OP", EXPR_OP),
2924 minit ("FUNCTION", EXPR_FUNCTION),
2925 minit ("CONSTANT", EXPR_CONSTANT),
2926 minit ("VARIABLE", EXPR_VARIABLE),
2927 minit ("SUBSTRING", EXPR_SUBSTRING),
2928 minit ("STRUCTURE", EXPR_STRUCTURE),
2929 minit ("ARRAY", EXPR_ARRAY),
2930 minit ("NULL", EXPR_NULL),
2931 minit ("COMPCALL", EXPR_COMPCALL),
2935 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2936 generic operators, not in expressions. INTRINSIC_USER is also
2937 replaced by the correct function name by the time we see it. */
2939 static const mstring intrinsics[] =
2941 minit ("UPLUS", INTRINSIC_UPLUS),
2942 minit ("UMINUS", INTRINSIC_UMINUS),
2943 minit ("PLUS", INTRINSIC_PLUS),
2944 minit ("MINUS", INTRINSIC_MINUS),
2945 minit ("TIMES", INTRINSIC_TIMES),
2946 minit ("DIVIDE", INTRINSIC_DIVIDE),
2947 minit ("POWER", INTRINSIC_POWER),
2948 minit ("CONCAT", INTRINSIC_CONCAT),
2949 minit ("AND", INTRINSIC_AND),
2950 minit ("OR", INTRINSIC_OR),
2951 minit ("EQV", INTRINSIC_EQV),
2952 minit ("NEQV", INTRINSIC_NEQV),
2953 minit ("EQ_SIGN", INTRINSIC_EQ),
2954 minit ("EQ", INTRINSIC_EQ_OS),
2955 minit ("NE_SIGN", INTRINSIC_NE),
2956 minit ("NE", INTRINSIC_NE_OS),
2957 minit ("GT_SIGN", INTRINSIC_GT),
2958 minit ("GT", INTRINSIC_GT_OS),
2959 minit ("GE_SIGN", INTRINSIC_GE),
2960 minit ("GE", INTRINSIC_GE_OS),
2961 minit ("LT_SIGN", INTRINSIC_LT),
2962 minit ("LT", INTRINSIC_LT_OS),
2963 minit ("LE_SIGN", INTRINSIC_LE),
2964 minit ("LE", INTRINSIC_LE_OS),
2965 minit ("NOT", INTRINSIC_NOT),
2966 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2971 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2974 fix_mio_expr (gfc_expr *e)
2976 gfc_symtree *ns_st = NULL;
2979 if (iomode != IO_OUTPUT)
2984 /* If this is a symtree for a symbol that came from a contained module
2985 namespace, it has a unique name and we should look in the current
2986 namespace to see if the required, non-contained symbol is available
2987 yet. If so, the latter should be written. */
2988 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2989 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2990 e->symtree->n.sym->name);
2992 /* On the other hand, if the existing symbol is the module name or the
2993 new symbol is a dummy argument, do not do the promotion. */
2994 if (ns_st && ns_st->n.sym
2995 && ns_st->n.sym->attr.flavor != FL_MODULE
2996 && !e->symtree->n.sym->attr.dummy)
2999 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
3003 /* In some circumstances, a function used in an initialization
3004 expression, in one use associated module, can fail to be
3005 coupled to its symtree when used in a specification
3006 expression in another module. */
3007 fname = e->value.function.esym ? e->value.function.esym->name
3008 : e->value.function.isym->name;
3009 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3014 /* This is probably a reference to a private procedure from another
3015 module. To prevent a segfault, make a generic with no specific
3016 instances. If this module is used, without the required
3017 specific coming from somewhere, the appropriate error message
3019 gfc_get_symbol (fname, gfc_current_ns, &sym);
3020 sym->attr.flavor = FL_PROCEDURE;
3021 sym->attr.generic = 1;
3022 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3023 gfc_commit_symbol (sym);
3028 /* Read and write expressions. The form "()" is allowed to indicate a
3032 mio_expr (gfc_expr **ep)
3040 if (iomode == IO_OUTPUT)
3049 MIO_NAME (expr_t) (e->expr_type, expr_types);
3054 if (t == ATOM_RPAREN)
3061 bad_module ("Expected expression type");
3063 e = *ep = gfc_get_expr ();
3064 e->where = gfc_current_locus;
3065 e->expr_type = (expr_t) find_enum (expr_types);
3068 mio_typespec (&e->ts);
3069 mio_integer (&e->rank);
3073 switch (e->expr_type)
3077 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
3079 switch (e->value.op.op)
3081 case INTRINSIC_UPLUS:
3082 case INTRINSIC_UMINUS:
3084 case INTRINSIC_PARENTHESES:
3085 mio_expr (&e->value.op.op1);
3088 case INTRINSIC_PLUS:
3089 case INTRINSIC_MINUS:
3090 case INTRINSIC_TIMES:
3091 case INTRINSIC_DIVIDE:
3092 case INTRINSIC_POWER:
3093 case INTRINSIC_CONCAT:
3097 case INTRINSIC_NEQV:
3099 case INTRINSIC_EQ_OS:
3101 case INTRINSIC_NE_OS:
3103 case INTRINSIC_GT_OS:
3105 case INTRINSIC_GE_OS:
3107 case INTRINSIC_LT_OS:
3109 case INTRINSIC_LE_OS:
3110 mio_expr (&e->value.op.op1);
3111 mio_expr (&e->value.op.op2);
3115 bad_module ("Bad operator");
3121 mio_symtree_ref (&e->symtree);
3122 mio_actual_arglist (&e->value.function.actual);
3124 if (iomode == IO_OUTPUT)
3126 e->value.function.name
3127 = mio_allocated_string (e->value.function.name);
3128 flag = e->value.function.esym != NULL;
3129 mio_integer (&flag);
3131 mio_symbol_ref (&e->value.function.esym);
3133 write_atom (ATOM_STRING, e->value.function.isym->name);
3137 require_atom (ATOM_STRING);
3138 e->value.function.name = gfc_get_string (atom_string);
3141 mio_integer (&flag);
3143 mio_symbol_ref (&e->value.function.esym);
3146 require_atom (ATOM_STRING);
3147 e->value.function.isym = gfc_find_function (atom_string);
3155 mio_symtree_ref (&e->symtree);
3156 mio_ref_list (&e->ref);
3159 case EXPR_SUBSTRING:
3160 e->value.character.string
3161 = CONST_CAST (gfc_char_t *,
3162 mio_allocated_wide_string (e->value.character.string,
3163 e->value.character.length));
3164 mio_ref_list (&e->ref);
3167 case EXPR_STRUCTURE:
3169 mio_constructor (&e->value.constructor);
3170 mio_shape (&e->shape, e->rank);
3177 mio_gmp_integer (&e->value.integer);
3181 gfc_set_model_kind (e->ts.kind);
3182 mio_gmp_real (&e->value.real);
3186 gfc_set_model_kind (e->ts.kind);
3187 mio_gmp_real (&mpc_realref (e->value.complex));
3188 mio_gmp_real (&mpc_imagref (e->value.complex));
3192 mio_integer (&e->value.logical);
3196 mio_integer (&e->value.character.length);
3197 e->value.character.string
3198 = CONST_CAST (gfc_char_t *,
3199 mio_allocated_wide_string (e->value.character.string,
3200 e->value.character.length));
3204 bad_module ("Bad type in constant expression");
3222 /* Read and write namelists. */
3225 mio_namelist (gfc_symbol *sym)
3227 gfc_namelist *n, *m;
3228 const char *check_name;
3232 if (iomode == IO_OUTPUT)
3234 for (n = sym->namelist; n; n = n->next)
3235 mio_symbol_ref (&n->sym);
3239 /* This departure from the standard is flagged as an error.
3240 It does, in fact, work correctly. TODO: Allow it
3242 if (sym->attr.flavor == FL_NAMELIST)
3244 check_name = find_use_name (sym->name, false);
3245 if (check_name && strcmp (check_name, sym->name) != 0)
3246 gfc_error ("Namelist %s cannot be renamed by USE "
3247 "association to %s", sym->name, check_name);
3251 while (peek_atom () != ATOM_RPAREN)
3253 n = gfc_get_namelist ();
3254 mio_symbol_ref (&n->sym);
3256 if (sym->namelist == NULL)
3263 sym->namelist_tail = m;
3270 /* Save/restore lists of gfc_interface structures. When loading an
3271 interface, we are really appending to the existing list of
3272 interfaces. Checking for duplicate and ambiguous interfaces has to
3273 be done later when all symbols have been loaded. */
3276 mio_interface_rest (gfc_interface **ip)
3278 gfc_interface *tail, *p;
3279 pointer_info *pi = NULL;
3281 if (iomode == IO_OUTPUT)
3284 for (p = *ip; p; p = p->next)
3285 mio_symbol_ref (&p->sym);
3300 if (peek_atom () == ATOM_RPAREN)
3303 p = gfc_get_interface ();
3304 p->where = gfc_current_locus;
3305 pi = mio_symbol_ref (&p->sym);
3321 /* Save/restore a nameless operator interface. */
3324 mio_interface (gfc_interface **ip)
3327 mio_interface_rest (ip);
3331 /* Save/restore a named operator interface. */
3334 mio_symbol_interface (const char **name, const char **module,
3338 mio_pool_string (name);
3339 mio_pool_string (module);
3340 mio_interface_rest (ip);
3345 mio_namespace_ref (gfc_namespace **nsp)
3350 p = mio_pointer_ref (nsp);
3352 if (p->type == P_UNKNOWN)
3353 p->type = P_NAMESPACE;
3355 if (iomode == IO_INPUT && p->integer != 0)
3357 ns = (gfc_namespace *) p->u.pointer;
3360 ns = gfc_get_namespace (NULL, 0);
3361 associate_integer_pointer (p, ns);
3369 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3371 static gfc_namespace* current_f2k_derived;
3374 mio_typebound_proc (gfc_typebound_proc** proc)
3377 int overriding_flag;
3379 if (iomode == IO_INPUT)
3381 *proc = gfc_get_typebound_proc (NULL);
3382 (*proc)->where = gfc_current_locus;
3388 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3390 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3391 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3392 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3393 overriding_flag = mio_name (overriding_flag, binding_overriding);
3394 (*proc)->deferred = ((overriding_flag & 2) != 0);
3395 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3396 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3398 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3399 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3400 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3402 mio_pool_string (&((*proc)->pass_arg));
3404 flag = (int) (*proc)->pass_arg_num;
3405 mio_integer (&flag);
3406 (*proc)->pass_arg_num = (unsigned) flag;
3408 if ((*proc)->is_generic)
3414 if (iomode == IO_OUTPUT)
3415 for (g = (*proc)->u.generic; g; g = g->next)
3416 mio_allocated_string (g->specific_st->name);
3419 (*proc)->u.generic = NULL;
3420 while (peek_atom () != ATOM_RPAREN)
3422 gfc_symtree** sym_root;
3424 g = gfc_get_tbp_generic ();
3427 require_atom (ATOM_STRING);
3428 sym_root = ¤t_f2k_derived->tb_sym_root;
3429 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3432 g->next = (*proc)->u.generic;
3433 (*proc)->u.generic = g;
3439 else if (!(*proc)->ppc)
3440 mio_symtree_ref (&(*proc)->u.specific);
3445 /* Walker-callback function for this purpose. */
3447 mio_typebound_symtree (gfc_symtree* st)
3449 if (iomode == IO_OUTPUT && !st->n.tb)
3452 if (iomode == IO_OUTPUT)
3455 mio_allocated_string (st->name);
3457 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3459 mio_typebound_proc (&st->n.tb);
3463 /* IO a full symtree (in all depth). */
3465 mio_full_typebound_tree (gfc_symtree** root)
3469 if (iomode == IO_OUTPUT)
3470 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3473 while (peek_atom () == ATOM_LPAREN)
3479 require_atom (ATOM_STRING);
3480 st = gfc_get_tbp_symtree (root, atom_string);
3483 mio_typebound_symtree (st);
3491 mio_finalizer (gfc_finalizer **f)
3493 if (iomode == IO_OUTPUT)
3496 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3497 mio_symtree_ref (&(*f)->proc_tree);
3501 *f = gfc_get_finalizer ();
3502 (*f)->where = gfc_current_locus; /* Value should not matter. */
3505 mio_symtree_ref (&(*f)->proc_tree);
3506 (*f)->proc_sym = NULL;
3511 mio_f2k_derived (gfc_namespace *f2k)
3513 current_f2k_derived = f2k;
3515 /* Handle the list of finalizer procedures. */
3517 if (iomode == IO_OUTPUT)
3520 for (f = f2k->finalizers; f; f = f->next)
3525 f2k->finalizers = NULL;
3526 while (peek_atom () != ATOM_RPAREN)
3528 gfc_finalizer *cur = NULL;
3529 mio_finalizer (&cur);
3530 cur->next = f2k->finalizers;
3531 f2k->finalizers = cur;
3536 /* Handle type-bound procedures. */
3537 mio_full_typebound_tree (&f2k->tb_sym_root);
3539 /* Type-bound user operators. */
3540 mio_full_typebound_tree (&f2k->tb_uop_root);
3542 /* Type-bound intrinsic operators. */
3544 if (iomode == IO_OUTPUT)
3547 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3549 gfc_intrinsic_op realop;
3551 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3555 realop = (gfc_intrinsic_op) op;
3556 mio_intrinsic_op (&realop);
3557 mio_typebound_proc (&f2k->tb_op[op]);
3562 while (peek_atom () != ATOM_RPAREN)
3564 gfc_intrinsic_op op = GFC_INTRINSIC_BEGIN; /* Silence GCC. */
3567 mio_intrinsic_op (&op);
3568 mio_typebound_proc (&f2k->tb_op[op]);
3575 mio_full_f2k_derived (gfc_symbol *sym)
3579 if (iomode == IO_OUTPUT)
3581 if (sym->f2k_derived)
3582 mio_f2k_derived (sym->f2k_derived);
3586 if (peek_atom () != ATOM_RPAREN)
3588 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3589 mio_f2k_derived (sym->f2k_derived);
3592 gcc_assert (!sym->f2k_derived);
3599 /* Unlike most other routines, the address of the symbol node is already
3600 fixed on input and the name/module has already been filled in. */
3603 mio_symbol (gfc_symbol *sym)
3605 int intmod = INTMOD_NONE;
3609 mio_symbol_attribute (&sym->attr);
3610 mio_typespec (&sym->ts);
3612 if (iomode == IO_OUTPUT)
3613 mio_namespace_ref (&sym->formal_ns);
3616 mio_namespace_ref (&sym->formal_ns);
3619 sym->formal_ns->proc_name = sym;
3624 /* Save/restore common block links. */
3625 mio_symbol_ref (&sym->common_next);
3627 mio_formal_arglist (&sym->formal);
3629 if (sym->attr.flavor == FL_PARAMETER)
3630 mio_expr (&sym->value);
3632 mio_array_spec (&sym->as);
3634 mio_symbol_ref (&sym->result);
3636 if (sym->attr.cray_pointee)
3637 mio_symbol_ref (&sym->cp_pointer);
3639 /* Note that components are always saved, even if they are supposed
3640 to be private. Component access is checked during searching. */
3642 mio_component_list (&sym->components, sym->attr.vtype);
3644 if (sym->components != NULL)
3645 sym->component_access
3646 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3648 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3649 mio_full_f2k_derived (sym);
3653 /* Add the fields that say whether this is from an intrinsic module,
3654 and if so, what symbol it is within the module. */
3655 /* mio_integer (&(sym->from_intmod)); */
3656 if (iomode == IO_OUTPUT)
3658 intmod = sym->from_intmod;
3659 mio_integer (&intmod);
3663 mio_integer (&intmod);
3664 sym->from_intmod = (intmod_id) intmod;
3667 mio_integer (&(sym->intmod_sym_id));
3669 if (sym->attr.flavor == FL_DERIVED)
3670 mio_integer (&(sym->hash_value));
3676 /************************* Top level subroutines *************************/
3678 /* Given a root symtree node and a symbol, try to find a symtree that
3679 references the symbol that is not a unique name. */
3681 static gfc_symtree *
3682 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3684 gfc_symtree *s = NULL;
3689 s = find_symtree_for_symbol (st->right, sym);
3692 s = find_symtree_for_symbol (st->left, sym);
3696 if (st->n.sym == sym && !check_unique_name (st->name))
3703 /* A recursive function to look for a specific symbol by name and by
3704 module. Whilst several symtrees might point to one symbol, its
3705 is sufficient for the purposes here than one exist. Note that
3706 generic interfaces are distinguished as are symbols that have been
3707 renamed in another module. */
3708 static gfc_symtree *
3709 find_symbol (gfc_symtree *st, const char *name,
3710 const char *module, int generic)
3713 gfc_symtree *retval, *s;
3715 if (st == NULL || st->n.sym == NULL)
3718 c = strcmp (name, st->n.sym->name);
3719 if (c == 0 && st->n.sym->module
3720 && strcmp (module, st->n.sym->module) == 0
3721 && !check_unique_name (st->name))
3723 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3725 /* Detect symbols that are renamed by use association in another
3726 module by the absence of a symtree and null attr.use_rename,
3727 since the latter is not transmitted in the module file. */
3728 if (((!generic && !st->n.sym->attr.generic)
3729 || (generic && st->n.sym->attr.generic))
3730 && !(s == NULL && !st->n.sym->attr.use_rename))
3734 retval = find_symbol (st->left, name, module, generic);
3737 retval = find_symbol (st->right, name, module, generic);
3743 /* Skip a list between balanced left and right parens. */
3753 switch (parse_atom ())
3776 /* Load operator interfaces from the module. Interfaces are unusual
3777 in that they attach themselves to existing symbols. */
3780 load_operator_interfaces (void)
3783 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3785 pointer_info *pi = NULL;
3790 while (peek_atom () != ATOM_RPAREN)
3794 mio_internal_string (name);
3795 mio_internal_string (module);
3797 n = number_use_names (name, true);
3800 for (i = 1; i <= n; i++)
3802 /* Decide if we need to load this one or not. */
3803 p = find_use_name_n (name, &i, true);
3807 while (parse_atom () != ATOM_RPAREN);
3813 uop = gfc_get_uop (p);
3814 pi = mio_interface_rest (&uop->op);
3818 if (gfc_find_uop (p, NULL))
3820 uop = gfc_get_uop (p);
3821 uop->op = gfc_get_interface ();
3822 uop->op->where = gfc_current_locus;
3823 add_fixup (pi->integer, &uop->op->sym);
3832 /* Load interfaces from the module. Interfaces are unusual in that
3833 they attach themselves to existing symbols. */
3836 load_generic_interfaces (void)
3839 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3841 gfc_interface *generic = NULL, *gen = NULL;
3843 bool ambiguous_set = false;
3847 while (peek_atom () != ATOM_RPAREN)
3851 mio_internal_string (name);
3852 mio_internal_string (module);
3854 n = number_use_names (name, false);
3855 renamed = n ? 1 : 0;
3858 for (i = 1; i <= n; i++)
3861 /* Decide if we need to load this one or not. */
3862 p = find_use_name_n (name, &i, false);
3864 st = find_symbol (gfc_current_ns->sym_root,
3865 name, module_name, 1);
3867 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3869 /* Skip the specific names for these cases. */
3870 while (i == 1 && parse_atom () != ATOM_RPAREN);
3875 /* If the symbol exists already and is being USEd without being
3876 in an ONLY clause, do not load a new symtree(11.3.2). */
3877 if (!only_flag && st)
3882 /* Make the symbol inaccessible if it has been added by a USE
3883 statement without an ONLY(11.3.2). */
3885 && !st->n.sym->attr.use_only
3886 && !st->n.sym->attr.use_rename
3887 && strcmp (st->n.sym->module, module_name) == 0)
3890 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3891 st = gfc_get_unique_symtree (gfc_current_ns);
3898 if (strcmp (st->name, p) != 0)
3900 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3906 /* Since we haven't found a valid generic interface, we had
3910 gfc_get_symbol (p, NULL, &sym);
3911 sym->name = gfc_get_string (name);
3912 sym->module = gfc_get_string (module_name);
3913 sym->attr.flavor = FL_PROCEDURE;
3914 sym->attr.generic = 1;
3915 sym->attr.use_assoc = 1;
3920 /* Unless sym is a generic interface, this reference
3923 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3927 if (st && !sym->attr.generic
3930 && strcmp(module, sym->module))
3932 ambiguous_set = true;
3937 sym->attr.use_only = only_flag;
3938 sym->attr.use_rename = renamed;
3942 mio_interface_rest (&sym->generic);
3943 generic = sym->generic;
3945 else if (!sym->generic)
3947 sym->generic = generic;
3948 sym->attr.generic_copy = 1;
3951 /* If a procedure that is not generic has generic interfaces
3952 that include itself, it is generic! We need to take care
3953 to retain symbols ambiguous that were already so. */
3954 if (sym->attr.use_assoc
3955 && !sym->attr.generic
3956 && sym->attr.flavor == FL_PROCEDURE)
3958 for (gen = generic; gen; gen = gen->next)
3960 if (gen->sym == sym)
3962 sym->attr.generic = 1;
3977 /* Load common blocks. */
3982 char name[GFC_MAX_SYMBOL_LEN + 1];
3987 while (peek_atom () != ATOM_RPAREN)
3991 mio_internal_string (name);
3993 p = gfc_get_common (name, 1);
3995 mio_symbol_ref (&p->head);
3996 mio_integer (&flags);
4000 p->threadprivate = 1;
4003 /* Get whether this was a bind(c) common or not. */
4004 mio_integer (&p->is_bind_c);
4005 /* Get the binding label. */
4006 mio_internal_string (p->binding_label);
4015 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
4016 so that unused variables are not loaded and so that the expression can
4022 gfc_equiv *head, *tail, *end, *eq;
4026 in_load_equiv = true;
4028 end = gfc_current_ns->equiv;
4029 while (end != NULL && end->next != NULL)
4032 while (peek_atom () != ATOM_RPAREN) {
4036 while(peek_atom () != ATOM_RPAREN)
4039 head = tail = gfc_get_equiv ();
4042 tail->eq = gfc_get_equiv ();
4046 mio_pool_string (&tail->module);
4047 mio_expr (&tail->expr);
4050 /* Unused equivalence members have a unique name. In addition, it
4051 must be checked that the symbols are from the same module. */
4053 for (eq = head; eq; eq = eq->eq)
4055 if (eq->expr->symtree->n.sym->module
4056 && head->expr->symtree->n.sym->module
4057 && strcmp (head->expr->symtree->n.sym->module,
4058 eq->expr->symtree->n.sym->module) == 0
4059 && !check_unique_name (eq->expr->symtree->name))
4068 for (eq = head; eq; eq = head)
4071 gfc_free_expr (eq->expr);
4077 gfc_current_ns->equiv = head;
4088 in_load_equiv = false;
4092 /* This function loads the sym_root of f2k_derived with the extensions to
4093 the derived type. */
4095 load_derived_extensions (void)
4098 gfc_symbol *derived;
4102 char name[GFC_MAX_SYMBOL_LEN + 1];
4103 char module[GFC_MAX_SYMBOL_LEN + 1];
4107 while (peek_atom () != ATOM_RPAREN)
4110 mio_integer (&symbol);
4111 info = get_integer (symbol);
4112 derived = info->u.rsym.sym;
4114 /* This one is not being loaded. */
4115 if (!info || !derived)
4117 while (peek_atom () != ATOM_RPAREN)
4122 gcc_assert (derived->attr.flavor == FL_DERIVED);
4123 if (derived->f2k_derived == NULL)
4124 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4126 while (peek_atom () != ATOM_RPAREN)
4129 mio_internal_string (name);
4130 mio_internal_string (module);
4132 /* Only use one use name to find the symbol. */
4134 p = find_use_name_n (name, &j, false);
4137 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4139 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4142 /* Only use the real name in f2k_derived to ensure a single
4144 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4157 /* Recursive function to traverse the pointer_info tree and load a
4158 needed symbol. We return nonzero if we load a symbol and stop the
4159 traversal, because the act of loading can alter the tree. */
4162 load_needed (pointer_info *p)
4173 rv |= load_needed (p->left);
4174 rv |= load_needed (p->right);
4176 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4179 p->u.rsym.state = USED;
4181 set_module_locus (&p->u.rsym.where);
4183 sym = p->u.rsym.sym;
4186 q = get_integer (p->u.rsym.ns);
4188 ns = (gfc_namespace *) q->u.pointer;
4191 /* Create an interface namespace if necessary. These are
4192 the namespaces that hold the formal parameters of module
4195 ns = gfc_get_namespace (NULL, 0);
4196 associate_integer_pointer (q, ns);
4199 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4200 doesn't go pear-shaped if the symbol is used. */
4202 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4205 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4206 sym->module = gfc_get_string (p->u.rsym.module);
4207 strcpy (sym->binding_label, p->u.rsym.binding_label);
4209 associate_integer_pointer (p, sym);
4213 sym->attr.use_assoc = 1;
4215 sym->attr.use_only = 1;
4216 if (p->u.rsym.renamed)
4217 sym->attr.use_rename = 1;
4223 /* Recursive function for cleaning up things after a module has been read. */
4226 read_cleanup (pointer_info *p)
4234 read_cleanup (p->left);
4235 read_cleanup (p->right);
4237 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4240 /* Add hidden symbols to the symtree. */
4241 q = get_integer (p->u.rsym.ns);
4242 ns = (gfc_namespace *) q->u.pointer;
4244 if (!p->u.rsym.sym->attr.vtype
4245 && !p->u.rsym.sym->attr.vtab)
4246 st = gfc_get_unique_symtree (ns);
4249 /* There is no reason to use 'unique_symtrees' for vtabs or
4250 vtypes - their name is fine for a symtree and reduces the
4251 namespace pollution. */
4252 st = gfc_find_symtree (ns->sym_root, p->u.rsym.sym->name);
4254 st = gfc_new_symtree (&ns->sym_root, p->u.rsym.sym->name);
4257 st->n.sym = p->u.rsym.sym;
4260 /* Fixup any symtree references. */
4261 p->u.rsym.symtree = st;
4262 resolve_fixups (p->u.rsym.stfixup, st);
4263 p->u.rsym.stfixup = NULL;
4266 /* Free unused symbols. */
4267 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4268 gfc_free_symbol (p->u.rsym.sym);
4272 /* It is not quite enough to check for ambiguity in the symbols by
4273 the loaded symbol and the new symbol not being identical. */
4275 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4279 symbol_attribute attr;
4281 if (st_sym->ns->proc_name && st_sym->name == st_sym->ns->proc_name->name)
4283 gfc_error ("'%s' of module '%s', imported at %C, is also the name of the "
4284 "current program unit", st_sym->name, module_name);
4288 rsym = info->u.rsym.sym;
4292 if (st_sym->attr.vtab || st_sym->attr.vtype)
4295 /* If the existing symbol is generic from a different module and
4296 the new symbol is generic there can be no ambiguity. */
4297 if (st_sym->attr.generic
4299 && strcmp (st_sym->module, module_name))
4301 /* The new symbol's attributes have not yet been read. Since
4302 we need attr.generic, read it directly. */
4303 get_module_locus (&locus);
4304 set_module_locus (&info->u.rsym.where);
4307 mio_symbol_attribute (&attr);
4308 set_module_locus (&locus);
4317 /* Read a module file. */
4322 module_locus operator_interfaces, user_operators, extensions;
4324 char name[GFC_MAX_SYMBOL_LEN + 1];
4326 int ambiguous, j, nuse, symbol;
4327 pointer_info *info, *q;
4332 get_module_locus (&operator_interfaces); /* Skip these for now. */
4335 get_module_locus (&user_operators);
4339 /* Skip commons, equivalences and derived type extensions for now. */
4343 get_module_locus (&extensions);
4348 /* Create the fixup nodes for all the symbols. */
4350 while (peek_atom () != ATOM_RPAREN)
4352 require_atom (ATOM_INTEGER);
4353 info = get_integer (atom_int);
4355 info->type = P_SYMBOL;
4356 info->u.rsym.state = UNUSED;
4358 mio_internal_string (info->u.rsym.true_name);
4359 mio_internal_string (info->u.rsym.module);
4360 mio_internal_string (info->u.rsym.binding_label);
4363 require_atom (ATOM_INTEGER);
4364 info->u.rsym.ns = atom_int;
4366 get_module_locus (&info->u.rsym.where);
4369 /* See if the symbol has already been loaded by a previous module.
4370 If so, we reference the existing symbol and prevent it from
4371 being loaded again. This should not happen if the symbol being
4372 read is an index for an assumed shape dummy array (ns != 1). */
4374 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4377 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4380 info->u.rsym.state = USED;
4381 info->u.rsym.sym = sym;
4383 /* Some symbols do not have a namespace (eg. formal arguments),
4384 so the automatic "unique symtree" mechanism must be suppressed
4385 by marking them as referenced. */
4386 q = get_integer (info->u.rsym.ns);
4387 if (q->u.pointer == NULL)
4389 info->u.rsym.referenced = 1;
4393 /* If possible recycle the symtree that references the symbol.
4394 If a symtree is not found and the module does not import one,
4395 a unique-name symtree is found by read_cleanup. */
4396 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4399 info->u.rsym.symtree = st;
4400 info->u.rsym.referenced = 1;
4406 /* Parse the symtree lists. This lets us mark which symbols need to
4407 be loaded. Renaming is also done at this point by replacing the
4412 while (peek_atom () != ATOM_RPAREN)
4414 mio_internal_string (name);
4415 mio_integer (&ambiguous);
4416 mio_integer (&symbol);
4418 info = get_integer (symbol);
4420 /* See how many use names there are. If none, go through the start
4421 of the loop at least once. */
4422 nuse = number_use_names (name, false);
4423 info->u.rsym.renamed = nuse ? 1 : 0;
4428 for (j = 1; j <= nuse; j++)
4430 /* Get the jth local name for this symbol. */
4431 p = find_use_name_n (name, &j, false);
4433 if (p == NULL && strcmp (name, module_name) == 0)
4436 /* Exception: Always import vtabs & vtypes. */
4437 if (p == NULL && (strncmp (name, "__vtab_", 5) == 0
4438 || strncmp (name, "__vtype_", 6) == 0))
4441 /* Skip symtree nodes not in an ONLY clause, unless there
4442 is an existing symtree loaded from another USE statement. */
4445 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4447 info->u.rsym.symtree = st;
4451 /* If a symbol of the same name and module exists already,
4452 this symbol, which is not in an ONLY clause, must not be
4453 added to the namespace(11.3.2). Note that find_symbol
4454 only returns the first occurrence that it finds. */
4455 if (!only_flag && !info->u.rsym.renamed
4456 && strcmp (name, module_name) != 0
4457 && find_symbol (gfc_current_ns->sym_root, name,
4461 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4465 /* Check for ambiguous symbols. */
4466 if (check_for_ambiguous (st->n.sym, info))
4468 info->u.rsym.symtree = st;
4472 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4474 /* Delete the symtree if the symbol has been added by a USE
4475 statement without an ONLY(11.3.2). Remember that the rsym
4476 will be the same as the symbol found in the symtree, for
4478 if (st && (only_flag || info->u.rsym.renamed)
4479 && !st->n.sym->attr.use_only
4480 && !st->n.sym->attr.use_rename
4481 && info->u.rsym.sym == st->n.sym)
4482 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4484 /* Create a symtree node in the current namespace for this
4486 st = check_unique_name (p)
4487 ? gfc_get_unique_symtree (gfc_current_ns)
4488 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4489 st->ambiguous = ambiguous;
4491 sym = info->u.rsym.sym;
4493 /* Create a symbol node if it doesn't already exist. */
4496 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4498 sym = info->u.rsym.sym;
4499 sym->module = gfc_get_string (info->u.rsym.module);
4501 /* TODO: hmm, can we test this? Do we know it will be
4502 initialized to zeros? */
4503 if (info->u.rsym.binding_label[0] != '\0')
4504 strcpy (sym->binding_label, info->u.rsym.binding_label);
4510 if (strcmp (name, p) != 0)
4511 sym->attr.use_rename = 1;
4513 /* We need to set the only_flag here so that symbols from the
4514 same USE...ONLY but earlier are not deleted from the tree in
4515 the gfc_delete_symtree above. */
4516 sym->attr.use_only = only_flag;
4518 /* Store the symtree pointing to this symbol. */
4519 info->u.rsym.symtree = st;
4521 if (info->u.rsym.state == UNUSED)
4522 info->u.rsym.state = NEEDED;
4523 info->u.rsym.referenced = 1;
4530 /* Load intrinsic operator interfaces. */
4531 set_module_locus (&operator_interfaces);
4534 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4536 if (i == INTRINSIC_USER)
4541 u = find_use_operator ((gfc_intrinsic_op) i);
4552 mio_interface (&gfc_current_ns->op[i]);
4557 /* Load generic and user operator interfaces. These must follow the
4558 loading of symtree because otherwise symbols can be marked as
4561 set_module_locus (&user_operators);
4563 load_operator_interfaces ();
4564 load_generic_interfaces ();
4569 /* At this point, we read those symbols that are needed but haven't
4570 been loaded yet. If one symbol requires another, the other gets
4571 marked as NEEDED if its previous state was UNUSED. */
4573 while (load_needed (pi_root));
4575 /* Make sure all elements of the rename-list were found in the module. */
4577 for (u = gfc_rename_list; u; u = u->next)
4582 if (u->op == INTRINSIC_NONE)
4584 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4585 u->use_name, &u->where, module_name);
4589 if (u->op == INTRINSIC_USER)
4591 gfc_error ("User operator '%s' referenced at %L not found "
4592 "in module '%s'", u->use_name, &u->where, module_name);
4596 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4597 "in module '%s'", gfc_op2string (u->op), &u->where,
4601 /* Now we should be in a position to fill f2k_derived with derived type
4602 extensions, since everything has been loaded. */
4603 set_module_locus (&extensions);
4604 load_derived_extensions ();
4606 /* Clean up symbol nodes that were never loaded, create references
4607 to hidden symbols. */
4609 read_cleanup (pi_root);
4613 /* Given an access type that is specific to an entity and the default
4614 access, return nonzero if the entity is publicly accessible. If the
4615 element is declared as PUBLIC, then it is public; if declared
4616 PRIVATE, then private, and otherwise it is public unless the default
4617 access in this context has been declared PRIVATE. */
4620 check_access (gfc_access specific_access, gfc_access default_access)
4622 if (specific_access == ACCESS_PUBLIC)
4624 if (specific_access == ACCESS_PRIVATE)
4627 if (gfc_option.flag_module_private)
4628 return default_access == ACCESS_PUBLIC;
4630 return default_access != ACCESS_PRIVATE;
4635 gfc_check_symbol_access (gfc_symbol *sym)
4637 if (sym->attr.vtab || sym->attr.vtype)
4640 return check_access (sym->attr.access, sym->ns->default_access);
4644 /* A structure to remember which commons we've already written. */
4646 struct written_common
4648 BBT_HEADER(written_common);
4649 const char *name, *label;
4652 static struct written_common *written_commons = NULL;
4654 /* Comparison function used for balancing the binary tree. */
4657 compare_written_commons (void *a1, void *b1)
4659 const char *aname = ((struct written_common *) a1)->name;
4660 const char *alabel = ((struct written_common *) a1)->label;
4661 const char *bname = ((struct written_common *) b1)->name;
4662 const char *blabel = ((struct written_common *) b1)->label;
4663 int c = strcmp (aname, bname);
4665 return (c != 0 ? c : strcmp (alabel, blabel));
4668 /* Free a list of written commons. */
4671 free_written_common (struct written_common *w)
4677 free_written_common (w->left);
4679 free_written_common (w->right);
4684 /* Write a common block to the module -- recursive helper function. */
4687 write_common_0 (gfc_symtree *st, bool this_module)
4693 struct written_common *w;
4694 bool write_me = true;
4699 write_common_0 (st->left, this_module);
4701 /* We will write out the binding label, or the name if no label given. */
4702 name = st->n.common->name;
4704 label = p->is_bind_c ? p->binding_label : p->name;
4706 /* Check if we've already output this common. */
4707 w = written_commons;
4710 int c = strcmp (name, w->name);
4711 c = (c != 0 ? c : strcmp (label, w->label));
4715 w = (c < 0) ? w->left : w->right;
4718 if (this_module && p->use_assoc)
4723 /* Write the common to the module. */
4725 mio_pool_string (&name);
4727 mio_symbol_ref (&p->head);
4728 flags = p->saved ? 1 : 0;
4729 if (p->threadprivate)
4731 mio_integer (&flags);
4733 /* Write out whether the common block is bind(c) or not. */
4734 mio_integer (&(p->is_bind_c));
4736 mio_pool_string (&label);
4739 /* Record that we have written this common. */
4740 w = XCNEW (struct written_common);
4743 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4746 write_common_0 (st->right, this_module);
4750 /* Write a common, by initializing the list of written commons, calling
4751 the recursive function write_common_0() and cleaning up afterwards. */
4754 write_common (gfc_symtree *st)
4756 written_commons = NULL;
4757 write_common_0 (st, true);
4758 write_common_0 (st, false);
4759 free_written_common (written_commons);
4760 written_commons = NULL;
4764 /* Write the blank common block to the module. */
4767 write_blank_common (void)
4769 const char * name = BLANK_COMMON_NAME;
4771 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4772 this, but it hasn't been checked. Just making it so for now. */
4775 if (gfc_current_ns->blank_common.head == NULL)
4780 mio_pool_string (&name);
4782 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4783 saved = gfc_current_ns->blank_common.saved;
4784 mio_integer (&saved);
4786 /* Write out whether the common block is bind(c) or not. */
4787 mio_integer (&is_bind_c);
4789 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4790 it doesn't matter because the label isn't used. */
4791 mio_pool_string (&name);
4797 /* Write equivalences to the module. */
4806 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4810 for (e = eq; e; e = e->eq)
4812 if (e->module == NULL)
4813 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4814 mio_allocated_string (e->module);
4815 mio_expr (&e->expr);
4824 /* Write derived type extensions to the module. */
4827 write_dt_extensions (gfc_symtree *st)
4829 if (!gfc_check_symbol_access (st->n.sym))
4831 if (!(st->n.sym->ns && st->n.sym->ns->proc_name
4832 && st->n.sym->ns->proc_name->attr.flavor == FL_MODULE))
4836 mio_pool_string (&st->n.sym->name);
4837 if (st->n.sym->module != NULL)
4838 mio_pool_string (&st->n.sym->module);
4840 mio_internal_string (module_name);
4845 write_derived_extensions (gfc_symtree *st)
4847 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4848 && (st->n.sym->f2k_derived != NULL)
4849 && (st->n.sym->f2k_derived->sym_root != NULL)))
4853 mio_symbol_ref (&(st->n.sym));
4854 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4855 write_dt_extensions);
4860 /* Write a symbol to the module. */
4863 write_symbol (int n, gfc_symbol *sym)
4867 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4868 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4871 mio_pool_string (&sym->name);
4873 mio_pool_string (&sym->module);
4874 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4876 label = sym->binding_label;
4877 mio_pool_string (&label);
4880 mio_pool_string (&sym->name);
4882 mio_pointer_ref (&sym->ns);
4889 /* Recursive traversal function to write the initial set of symbols to
4890 the module. We check to see if the symbol should be written
4891 according to the access specification. */
4894 write_symbol0 (gfc_symtree *st)
4898 bool dont_write = false;
4903 write_symbol0 (st->left);
4906 if (sym->module == NULL)
4907 sym->module = gfc_get_string (module_name);
4909 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4910 && !sym->attr.subroutine && !sym->attr.function)
4913 if (!gfc_check_symbol_access (sym))
4918 p = get_pointer (sym);
4919 if (p->type == P_UNKNOWN)
4922 if (p->u.wsym.state != WRITTEN)
4924 write_symbol (p->integer, sym);
4925 p->u.wsym.state = WRITTEN;
4929 write_symbol0 (st->right);
4933 /* Recursive traversal function to write the secondary set of symbols
4934 to the module file. These are symbols that were not public yet are
4935 needed by the public symbols or another dependent symbol. The act
4936 of writing a symbol can modify the pointer_info tree, so we cease
4937 traversal if we find a symbol to write. We return nonzero if a
4938 symbol was written and pass that information upwards. */
4941 write_symbol1 (pointer_info *p)
4948 result = write_symbol1 (p->left);
4950 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4952 p->u.wsym.state = WRITTEN;
4953 write_symbol (p->integer, p->u.wsym.sym);
4957 result |= write_symbol1 (p->right);
4962 /* Write operator interfaces associated with a symbol. */
4965 write_operator (gfc_user_op *uop)
4967 static char nullstring[] = "";
4968 const char *p = nullstring;
4970 if (uop->op == NULL || !check_access (uop->access, uop->ns->default_access))
4973 mio_symbol_interface (&uop->name, &p, &uop->op);
4977 /* Write generic interfaces from the namespace sym_root. */
4980 write_generic (gfc_symtree *st)
4987 write_generic (st->left);
4988 write_generic (st->right);
4991 if (!sym || check_unique_name (st->name))
4994 if (sym->generic == NULL || !gfc_check_symbol_access (sym))
4997 if (sym->module == NULL)
4998 sym->module = gfc_get_string (module_name);
5000 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
5005 write_symtree (gfc_symtree *st)
5012 /* A symbol in an interface body must not be visible in the
5014 if (sym->ns != gfc_current_ns
5015 && sym->ns->proc_name
5016 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
5019 if (!gfc_check_symbol_access (sym)
5020 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
5021 && !sym->attr.subroutine && !sym->attr.function))
5024 if (check_unique_name (st->name))
5027 p = find_pointer (sym);
5029 gfc_internal_error ("write_symtree(): Symbol not written");
5031 mio_pool_string (&st->name);
5032 mio_integer (&st->ambiguous);
5033 mio_integer (&p->integer);
5042 /* Write the operator interfaces. */
5045 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
5047 if (i == INTRINSIC_USER)
5050 mio_interface (check_access (gfc_current_ns->operator_access[i],
5051 gfc_current_ns->default_access)
5052 ? &gfc_current_ns->op[i] : NULL);
5060 gfc_traverse_user_op (gfc_current_ns, write_operator);
5066 write_generic (gfc_current_ns->sym_root);
5072 write_blank_common ();
5073 write_common (gfc_current_ns->common_root);
5085 gfc_traverse_symtree (gfc_current_ns->sym_root,
5086 write_derived_extensions);
5091 /* Write symbol information. First we traverse all symbols in the
5092 primary namespace, writing those that need to be written.
5093 Sometimes writing one symbol will cause another to need to be
5094 written. A list of these symbols ends up on the write stack, and
5095 we end by popping the bottom of the stack and writing the symbol
5096 until the stack is empty. */
5100 write_symbol0 (gfc_current_ns->sym_root);
5101 while (write_symbol1 (pi_root))
5110 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
5115 /* Read a MD5 sum from the header of a module file. If the file cannot
5116 be opened, or we have any other error, we return -1. */
5119 read_md5_from_module_file (const char * filename, unsigned char md5[16])
5125 /* Open the file. */
5126 if ((file = fopen (filename, "r")) == NULL)
5129 /* Read the first line. */
5130 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5136 /* The file also needs to be overwritten if the version number changed. */
5137 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
5138 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
5144 /* Read a second line. */
5145 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5151 /* Close the file. */
5154 /* If the header is not what we expect, or is too short, bail out. */
5155 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5158 /* Now, we have a real MD5, read it into the array. */
5159 for (n = 0; n < 16; n++)
5163 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5173 /* Given module, dump it to disk. If there was an error while
5174 processing the module, dump_flag will be set to zero and we delete
5175 the module file, even if it was already there. */
5178 gfc_dump_module (const char *name, int dump_flag)
5181 char *filename, *filename_tmp, *p;
5184 unsigned char md5_new[16], md5_old[16];
5186 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5187 if (gfc_option.module_dir != NULL)
5189 n += strlen (gfc_option.module_dir);
5190 filename = (char *) alloca (n);
5191 strcpy (filename, gfc_option.module_dir);
5192 strcat (filename, name);
5196 filename = (char *) alloca (n);
5197 strcpy (filename, name);
5199 strcat (filename, MODULE_EXTENSION);
5201 /* Name of the temporary file used to write the module. */
5202 filename_tmp = (char *) alloca (n + 1);
5203 strcpy (filename_tmp, filename);
5204 strcat (filename_tmp, "0");
5206 /* There was an error while processing the module. We delete the
5207 module file, even if it was already there. */
5214 if (gfc_cpp_makedep ())
5215 gfc_cpp_add_target (filename);
5217 /* Write the module to the temporary file. */
5218 module_fp = fopen (filename_tmp, "w");
5219 if (module_fp == NULL)
5220 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5221 filename_tmp, xstrerror (errno));
5223 /* Write the header, including space reserved for the MD5 sum. */
5227 *strchr (p, '\n') = '\0';
5229 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5230 "MD5:", MOD_VERSION, gfc_source_file, p);
5231 fgetpos (module_fp, &md5_pos);
5232 fputs ("00000000000000000000000000000000 -- "
5233 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5235 /* Initialize the MD5 context that will be used for output. */
5236 md5_init_ctx (&ctx);
5238 /* Write the module itself. */
5240 strcpy (module_name, name);
5246 free_pi_tree (pi_root);
5251 /* Write the MD5 sum to the header of the module file. */
5252 md5_finish_ctx (&ctx, md5_new);
5253 fsetpos (module_fp, &md5_pos);
5254 for (n = 0; n < 16; n++)
5255 fprintf (module_fp, "%02x", md5_new[n]);
5257 if (fclose (module_fp))
5258 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5259 filename_tmp, xstrerror (errno));
5261 /* Read the MD5 from the header of the old module file and compare. */
5262 if (read_md5_from_module_file (filename, md5_old) != 0
5263 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5265 /* Module file have changed, replace the old one. */
5266 if (unlink (filename) && errno != ENOENT)
5267 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5269 if (rename (filename_tmp, filename))
5270 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5271 filename_tmp, filename, xstrerror (errno));
5275 if (unlink (filename_tmp))
5276 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5277 filename_tmp, xstrerror (errno));
5283 create_intrinsic_function (const char *name, gfc_isym_id id,
5284 const char *modname, intmod_id module)
5286 gfc_intrinsic_sym *isym;
5287 gfc_symtree *tmp_symtree;
5290 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5293 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5295 gfc_error ("Symbol '%s' already declared", name);
5298 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5299 sym = tmp_symtree->n.sym;
5301 isym = gfc_intrinsic_function_by_id (id);
5304 sym->attr.flavor = FL_PROCEDURE;
5305 sym->attr.intrinsic = 1;
5307 sym->module = gfc_get_string (modname);
5308 sym->attr.use_assoc = 1;
5309 sym->from_intmod = module;
5310 sym->intmod_sym_id = id;
5314 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5315 the current namespace for all named constants, pointer types, and
5316 procedures in the module unless the only clause was used or a rename
5317 list was provided. */
5320 import_iso_c_binding_module (void)
5322 gfc_symbol *mod_sym = NULL;
5323 gfc_symtree *mod_symtree = NULL;
5324 const char *iso_c_module_name = "__iso_c_binding";
5328 /* Look only in the current namespace. */
5329 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5331 if (mod_symtree == NULL)
5333 /* symtree doesn't already exist in current namespace. */
5334 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5337 if (mod_symtree != NULL)
5338 mod_sym = mod_symtree->n.sym;
5340 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5341 "create symbol for %s", iso_c_module_name);
5343 mod_sym->attr.flavor = FL_MODULE;
5344 mod_sym->attr.intrinsic = 1;
5345 mod_sym->module = gfc_get_string (iso_c_module_name);
5346 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5349 /* Generate the symbols for the named constants representing
5350 the kinds for intrinsic data types. */
5351 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5354 for (u = gfc_rename_list; u; u = u->next)
5355 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5361 #define NAMED_FUNCTION(a,b,c,d) \
5363 create_intrinsic_function (u->local_name[0] ? u->local_name \
5366 iso_c_module_name, \
5367 INTMOD_ISO_C_BINDING); \
5369 #include "iso-c-binding.def"
5370 #undef NAMED_FUNCTION
5373 generate_isocbinding_symbol (iso_c_module_name,
5374 (iso_c_binding_symbol) i,
5375 u->local_name[0] ? u->local_name
5380 if (!found && !only_flag)
5383 #define NAMED_FUNCTION(a,b,c,d) \
5385 if ((gfc_option.allow_std & d) == 0) \
5387 create_intrinsic_function (b, (gfc_isym_id) c, \
5388 iso_c_module_name, \
5389 INTMOD_ISO_C_BINDING); \
5391 #include "iso-c-binding.def"
5392 #undef NAMED_FUNCTION
5395 generate_isocbinding_symbol (iso_c_module_name,
5396 (iso_c_binding_symbol) i, NULL);
5400 for (u = gfc_rename_list; u; u = u->next)
5405 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5406 "module ISO_C_BINDING", u->use_name, &u->where);
5411 /* Add an integer named constant from a given module. */
5414 create_int_parameter (const char *name, int value, const char *modname,
5415 intmod_id module, int id)
5417 gfc_symtree *tmp_symtree;
5420 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5421 if (tmp_symtree != NULL)
5423 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5426 gfc_error ("Symbol '%s' already declared", name);
5429 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5430 sym = tmp_symtree->n.sym;
5432 sym->module = gfc_get_string (modname);
5433 sym->attr.flavor = FL_PARAMETER;
5434 sym->ts.type = BT_INTEGER;
5435 sym->ts.kind = gfc_default_integer_kind;
5436 sym->value = gfc_get_int_expr (gfc_default_integer_kind, NULL, value);
5437 sym->attr.use_assoc = 1;
5438 sym->from_intmod = module;
5439 sym->intmod_sym_id = id;
5443 /* Value is already contained by the array constructor, but not
5447 create_int_parameter_array (const char *name, int size, gfc_expr *value,
5448 const char *modname, intmod_id module, int id)
5450 gfc_symtree *tmp_symtree;
5453 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5454 if (tmp_symtree != NULL)
5456 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5459 gfc_error ("Symbol '%s' already declared", name);
5462 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5463 sym = tmp_symtree->n.sym;
5465 sym->module = gfc_get_string (modname);
5466 sym->attr.flavor = FL_PARAMETER;
5467 sym->ts.type = BT_INTEGER;
5468 sym->ts.kind = gfc_default_integer_kind;
5469 sym->attr.use_assoc = 1;
5470 sym->from_intmod = module;
5471 sym->intmod_sym_id = id;
5472 sym->attr.dimension = 1;
5473 sym->as = gfc_get_array_spec ();
5475 sym->as->type = AS_EXPLICIT;
5476 sym->as->lower[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
5477 sym->as->upper[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, size);
5480 sym->value->shape = gfc_get_shape (1);
5481 mpz_init_set_ui (sym->value->shape[0], size);
5485 /* Add an derived type for a given module. */
5488 create_derived_type (const char *name, const char *modname,
5489 intmod_id module, int id)
5491 gfc_symtree *tmp_symtree;
5494 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5495 if (tmp_symtree != NULL)
5497 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5500 gfc_error ("Symbol '%s' already declared", name);
5503 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5504 sym = tmp_symtree->n.sym;
5506 sym->module = gfc_get_string (modname);
5507 sym->from_intmod = module;
5508 sym->intmod_sym_id = id;
5509 sym->attr.flavor = FL_DERIVED;
5510 sym->attr.private_comp = 1;
5511 sym->attr.zero_comp = 1;
5512 sym->attr.use_assoc = 1;
5517 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5520 use_iso_fortran_env_module (void)
5522 static char mod[] = "iso_fortran_env";
5524 gfc_symbol *mod_sym;
5525 gfc_symtree *mod_symtree;
5529 intmod_sym symbol[] = {
5530 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5531 #include "iso-fortran-env.def"
5533 #define NAMED_KINDARRAY(a,b,c,d) { a, b, 0, d },
5534 #include "iso-fortran-env.def"
5535 #undef NAMED_KINDARRAY
5536 #define NAMED_DERIVED_TYPE(a,b,c,d) { a, b, 0, d },
5537 #include "iso-fortran-env.def"
5538 #undef NAMED_DERIVED_TYPE
5539 #define NAMED_FUNCTION(a,b,c,d) { a, b, c, d },
5540 #include "iso-fortran-env.def"
5541 #undef NAMED_FUNCTION
5542 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5545 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5546 #include "iso-fortran-env.def"
5549 /* Generate the symbol for the module itself. */
5550 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5551 if (mod_symtree == NULL)
5553 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5554 gcc_assert (mod_symtree);
5555 mod_sym = mod_symtree->n.sym;
5557 mod_sym->attr.flavor = FL_MODULE;
5558 mod_sym->attr.intrinsic = 1;
5559 mod_sym->module = gfc_get_string (mod);
5560 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5563 if (!mod_symtree->n.sym->attr.intrinsic)
5564 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5565 "non-intrinsic module name used previously", mod);
5567 /* Generate the symbols for the module integer named constants. */
5569 for (i = 0; symbol[i].name; i++)
5572 for (u = gfc_rename_list; u; u = u->next)
5574 if (strcmp (symbol[i].name, u->use_name) == 0)
5579 if (gfc_notify_std (symbol[i].standard, "The symbol '%s', "
5580 "referrenced at %C, is not in the selected "
5581 "standard", symbol[i].name) == FAILURE)
5584 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5585 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5586 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named "
5587 "constant from intrinsic module "
5588 "ISO_FORTRAN_ENV at %C is incompatible with "
5590 gfc_option.flag_default_integer
5591 ? "-fdefault-integer-8"
5592 : "-fdefault-real-8");
5593 switch (symbol[i].id)
5595 #define NAMED_INTCST(a,b,c,d) \
5597 #include "iso-fortran-env.def"
5599 create_int_parameter (u->local_name[0] ? u->local_name
5601 symbol[i].value, mod,
5602 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5605 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5607 expr = gfc_get_array_expr (BT_INTEGER, \
5608 gfc_default_integer_kind,\
5610 for (j = 0; KINDS[j].kind != 0; j++) \
5611 gfc_constructor_append_expr (&expr->value.constructor, \
5612 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5613 KINDS[j].kind), NULL); \
5614 create_int_parameter_array (u->local_name[0] ? u->local_name \
5617 INTMOD_ISO_FORTRAN_ENV, \
5620 #include "iso-fortran-env.def"
5621 #undef NAMED_KINDARRAY
5623 #define NAMED_DERIVED_TYPE(a,b,TYPE,STD) \
5625 #include "iso-fortran-env.def"
5626 create_derived_type (u->local_name[0] ? u->local_name
5628 mod, INTMOD_ISO_FORTRAN_ENV,
5631 #undef NAMED_DERIVED_TYPE
5633 #define NAMED_FUNCTION(a,b,c,d) \
5635 #include "iso-fortran-env.def"
5636 #undef NAMED_FUNCTION
5637 create_intrinsic_function (u->local_name[0] ? u->local_name
5639 (gfc_isym_id) symbol[i].value, mod,
5640 INTMOD_ISO_FORTRAN_ENV);
5649 if (!found && !only_flag)
5651 if ((gfc_option.allow_std & symbol[i].standard) == 0)
5654 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5655 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5656 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5657 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5658 "incompatible with option %s",
5659 gfc_option.flag_default_integer
5660 ? "-fdefault-integer-8" : "-fdefault-real-8");
5662 switch (symbol[i].id)
5664 #define NAMED_INTCST(a,b,c,d) \
5666 #include "iso-fortran-env.def"
5668 create_int_parameter (symbol[i].name, symbol[i].value, mod,
5669 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5672 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5674 expr = gfc_get_array_expr (BT_INTEGER, gfc_default_integer_kind, \
5676 for (j = 0; KINDS[j].kind != 0; j++) \
5677 gfc_constructor_append_expr (&expr->value.constructor, \
5678 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5679 KINDS[j].kind), NULL); \
5680 create_int_parameter_array (symbol[i].name, j, expr, mod, \
5681 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);\
5683 #include "iso-fortran-env.def"
5684 #undef NAMED_KINDARRAY
5686 #define NAMED_DERIVED_TYPE(a,b,TYPE,STD) \
5688 #include "iso-fortran-env.def"
5689 create_derived_type (symbol[i].name, mod, INTMOD_ISO_FORTRAN_ENV,
5692 #undef NAMED_DERIVED_TYPE
5694 #define NAMED_FUNCTION(a,b,c,d) \
5696 #include "iso-fortran-env.def"
5697 #undef NAMED_FUNCTION
5698 create_intrinsic_function (symbol[i].name,
5699 (gfc_isym_id) symbol[i].value, mod,
5700 INTMOD_ISO_FORTRAN_ENV);
5709 for (u = gfc_rename_list; u; u = u->next)
5714 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5715 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5720 /* Process a USE directive. */
5723 gfc_use_module (void)
5728 gfc_symtree *mod_symtree;
5729 gfc_use_list *use_stmt;
5731 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5733 strcpy (filename, module_name);
5734 strcat (filename, MODULE_EXTENSION);
5736 /* First, try to find an non-intrinsic module, unless the USE statement
5737 specified that the module is intrinsic. */
5740 module_fp = gfc_open_included_file (filename, true, true);
5742 /* Then, see if it's an intrinsic one, unless the USE statement
5743 specified that the module is non-intrinsic. */
5744 if (module_fp == NULL && !specified_nonint)
5746 if (strcmp (module_name, "iso_fortran_env") == 0
5747 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5748 "intrinsic module at %C") != FAILURE)
5750 use_iso_fortran_env_module ();
5754 if (strcmp (module_name, "iso_c_binding") == 0
5755 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5756 "ISO_C_BINDING module at %C") != FAILURE)
5758 import_iso_c_binding_module();
5762 module_fp = gfc_open_intrinsic_module (filename);
5764 if (module_fp == NULL && specified_int)
5765 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5769 if (module_fp == NULL)
5770 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5771 filename, xstrerror (errno));
5773 /* Check that we haven't already USEd an intrinsic module with the
5776 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5777 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5778 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5779 "intrinsic module name used previously", module_name);
5786 /* Skip the first two lines of the module, after checking that this is
5787 a gfortran module file. */
5793 bad_module ("Unexpected end of module");
5796 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5797 || (start == 2 && strcmp (atom_name, " module") != 0))
5798 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5802 if (strcmp (atom_name, " version") != 0
5803 || module_char () != ' '
5804 || parse_atom () != ATOM_STRING)
5805 gfc_fatal_error ("Parse error when checking module version"
5806 " for file '%s' opened at %C", filename);
5808 if (strcmp (atom_string, MOD_VERSION))
5810 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5811 "for file '%s' opened at %C", atom_string,
5812 MOD_VERSION, filename);
5822 /* Make sure we're not reading the same module that we may be building. */
5823 for (p = gfc_state_stack; p; p = p->previous)
5824 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5825 gfc_fatal_error ("Can't USE the same module we're building!");
5828 init_true_name_tree ();
5832 free_true_name (true_name_root);
5833 true_name_root = NULL;
5835 free_pi_tree (pi_root);
5840 use_stmt = gfc_get_use_list ();
5841 use_stmt->module_name = gfc_get_string (module_name);
5842 use_stmt->only_flag = only_flag;
5843 use_stmt->rename = gfc_rename_list;
5844 use_stmt->where = use_locus;
5845 gfc_rename_list = NULL;
5846 use_stmt->next = gfc_current_ns->use_stmts;
5847 gfc_current_ns->use_stmts = use_stmt;
5852 gfc_free_use_stmts (gfc_use_list *use_stmts)
5855 for (; use_stmts; use_stmts = next)
5857 gfc_use_rename *next_rename;
5859 for (; use_stmts->rename; use_stmts->rename = next_rename)
5861 next_rename = use_stmts->rename->next;
5862 free (use_stmts->rename);
5864 next = use_stmts->next;
5871 gfc_module_init_2 (void)
5873 last_atom = ATOM_LPAREN;
5878 gfc_module_done_2 (void)