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 "5"
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 gfc_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)
1228 gfc_free (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);
1621 gfc_free (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);
1647 gfc_free (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);
1664 gfc_free (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, AB_ALLOC_COMP,
1675 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1676 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1677 AB_IS_CLASS, AB_PROCEDURE, AB_PROC_POINTER, AB_ASYNCHRONOUS, AB_CODIMENSION,
1678 AB_COARRAY_COMP, AB_VTYPE, AB_VTAB, AB_CONTIGUOUS
1682 static const mstring attr_bits[] =
1684 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1685 minit ("ASYNCHRONOUS", AB_ASYNCHRONOUS),
1686 minit ("DIMENSION", AB_DIMENSION),
1687 minit ("CODIMENSION", AB_CODIMENSION),
1688 minit ("CONTIGUOUS", AB_CONTIGUOUS),
1689 minit ("EXTERNAL", AB_EXTERNAL),
1690 minit ("INTRINSIC", AB_INTRINSIC),
1691 minit ("OPTIONAL", AB_OPTIONAL),
1692 minit ("POINTER", AB_POINTER),
1693 minit ("VOLATILE", AB_VOLATILE),
1694 minit ("TARGET", AB_TARGET),
1695 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1696 minit ("DUMMY", AB_DUMMY),
1697 minit ("RESULT", AB_RESULT),
1698 minit ("DATA", AB_DATA),
1699 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1700 minit ("IN_COMMON", AB_IN_COMMON),
1701 minit ("FUNCTION", AB_FUNCTION),
1702 minit ("SUBROUTINE", AB_SUBROUTINE),
1703 minit ("SEQUENCE", AB_SEQUENCE),
1704 minit ("ELEMENTAL", AB_ELEMENTAL),
1705 minit ("PURE", AB_PURE),
1706 minit ("RECURSIVE", AB_RECURSIVE),
1707 minit ("GENERIC", AB_GENERIC),
1708 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1709 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1710 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1711 minit ("IS_BIND_C", AB_IS_BIND_C),
1712 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1713 minit ("IS_ISO_C", AB_IS_ISO_C),
1714 minit ("VALUE", AB_VALUE),
1715 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1716 minit ("COARRAY_COMP", AB_COARRAY_COMP),
1717 minit ("POINTER_COMP", AB_POINTER_COMP),
1718 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1719 minit ("ZERO_COMP", AB_ZERO_COMP),
1720 minit ("PROTECTED", AB_PROTECTED),
1721 minit ("ABSTRACT", AB_ABSTRACT),
1722 minit ("IS_CLASS", AB_IS_CLASS),
1723 minit ("PROCEDURE", AB_PROCEDURE),
1724 minit ("PROC_POINTER", AB_PROC_POINTER),
1725 minit ("VTYPE", AB_VTYPE),
1726 minit ("VTAB", AB_VTAB),
1730 /* For binding attributes. */
1731 static const mstring binding_passing[] =
1734 minit ("NOPASS", 1),
1737 static const mstring binding_overriding[] =
1739 minit ("OVERRIDABLE", 0),
1740 minit ("NON_OVERRIDABLE", 1),
1741 minit ("DEFERRED", 2),
1744 static const mstring binding_generic[] =
1746 minit ("SPECIFIC", 0),
1747 minit ("GENERIC", 1),
1750 static const mstring binding_ppc[] =
1752 minit ("NO_PPC", 0),
1757 /* Specialization of mio_name. */
1758 DECL_MIO_NAME (ab_attribute)
1759 DECL_MIO_NAME (ar_type)
1760 DECL_MIO_NAME (array_type)
1762 DECL_MIO_NAME (expr_t)
1763 DECL_MIO_NAME (gfc_access)
1764 DECL_MIO_NAME (gfc_intrinsic_op)
1765 DECL_MIO_NAME (ifsrc)
1766 DECL_MIO_NAME (save_state)
1767 DECL_MIO_NAME (procedure_type)
1768 DECL_MIO_NAME (ref_type)
1769 DECL_MIO_NAME (sym_flavor)
1770 DECL_MIO_NAME (sym_intent)
1771 #undef DECL_MIO_NAME
1773 /* Symbol attributes are stored in list with the first three elements
1774 being the enumerated fields, while the remaining elements (if any)
1775 indicate the individual attribute bits. The access field is not
1776 saved-- it controls what symbols are exported when a module is
1780 mio_symbol_attribute (symbol_attribute *attr)
1783 unsigned ext_attr,extension_level;
1787 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1788 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1789 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1790 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1791 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1793 ext_attr = attr->ext_attr;
1794 mio_integer ((int *) &ext_attr);
1795 attr->ext_attr = ext_attr;
1797 extension_level = attr->extension;
1798 mio_integer ((int *) &extension_level);
1799 attr->extension = extension_level;
1801 if (iomode == IO_OUTPUT)
1803 if (attr->allocatable)
1804 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1805 if (attr->asynchronous)
1806 MIO_NAME (ab_attribute) (AB_ASYNCHRONOUS, attr_bits);
1807 if (attr->dimension)
1808 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1809 if (attr->codimension)
1810 MIO_NAME (ab_attribute) (AB_CODIMENSION, attr_bits);
1811 if (attr->contiguous)
1812 MIO_NAME (ab_attribute) (AB_CONTIGUOUS, attr_bits);
1814 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1815 if (attr->intrinsic)
1816 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1818 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1820 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1821 if (attr->is_protected)
1822 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1824 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1825 if (attr->volatile_)
1826 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1828 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1829 if (attr->threadprivate)
1830 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1832 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1834 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1835 /* We deliberately don't preserve the "entry" flag. */
1838 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1839 if (attr->in_namelist)
1840 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1841 if (attr->in_common)
1842 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1845 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1846 if (attr->subroutine)
1847 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1849 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1851 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1854 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1855 if (attr->elemental)
1856 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1858 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1859 if (attr->recursive)
1860 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1861 if (attr->always_explicit)
1862 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1863 if (attr->cray_pointer)
1864 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1865 if (attr->cray_pointee)
1866 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1867 if (attr->is_bind_c)
1868 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1869 if (attr->is_c_interop)
1870 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1872 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1873 if (attr->alloc_comp)
1874 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1875 if (attr->pointer_comp)
1876 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1877 if (attr->private_comp)
1878 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1879 if (attr->coarray_comp)
1880 MIO_NAME (ab_attribute) (AB_COARRAY_COMP, attr_bits);
1881 if (attr->zero_comp)
1882 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1884 MIO_NAME (ab_attribute) (AB_IS_CLASS, attr_bits);
1885 if (attr->procedure)
1886 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1887 if (attr->proc_pointer)
1888 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1890 MIO_NAME (ab_attribute) (AB_VTYPE, attr_bits);
1892 MIO_NAME (ab_attribute) (AB_VTAB, attr_bits);
1902 if (t == ATOM_RPAREN)
1905 bad_module ("Expected attribute bit name");
1907 switch ((ab_attribute) find_enum (attr_bits))
1909 case AB_ALLOCATABLE:
1910 attr->allocatable = 1;
1912 case AB_ASYNCHRONOUS:
1913 attr->asynchronous = 1;
1916 attr->dimension = 1;
1918 case AB_CODIMENSION:
1919 attr->codimension = 1;
1922 attr->contiguous = 1;
1928 attr->intrinsic = 1;
1937 attr->is_protected = 1;
1943 attr->volatile_ = 1;
1948 case AB_THREADPRIVATE:
1949 attr->threadprivate = 1;
1960 case AB_IN_NAMELIST:
1961 attr->in_namelist = 1;
1964 attr->in_common = 1;
1970 attr->subroutine = 1;
1982 attr->elemental = 1;
1988 attr->recursive = 1;
1990 case AB_ALWAYS_EXPLICIT:
1991 attr->always_explicit = 1;
1993 case AB_CRAY_POINTER:
1994 attr->cray_pointer = 1;
1996 case AB_CRAY_POINTEE:
1997 attr->cray_pointee = 1;
2000 attr->is_bind_c = 1;
2002 case AB_IS_C_INTEROP:
2003 attr->is_c_interop = 1;
2009 attr->alloc_comp = 1;
2011 case AB_COARRAY_COMP:
2012 attr->coarray_comp = 1;
2014 case AB_POINTER_COMP:
2015 attr->pointer_comp = 1;
2017 case AB_PRIVATE_COMP:
2018 attr->private_comp = 1;
2021 attr->zero_comp = 1;
2027 attr->procedure = 1;
2029 case AB_PROC_POINTER:
2030 attr->proc_pointer = 1;
2044 static const mstring bt_types[] = {
2045 minit ("INTEGER", BT_INTEGER),
2046 minit ("REAL", BT_REAL),
2047 minit ("COMPLEX", BT_COMPLEX),
2048 minit ("LOGICAL", BT_LOGICAL),
2049 minit ("CHARACTER", BT_CHARACTER),
2050 minit ("DERIVED", BT_DERIVED),
2051 minit ("CLASS", BT_CLASS),
2052 minit ("PROCEDURE", BT_PROCEDURE),
2053 minit ("UNKNOWN", BT_UNKNOWN),
2054 minit ("VOID", BT_VOID),
2060 mio_charlen (gfc_charlen **clp)
2066 if (iomode == IO_OUTPUT)
2070 mio_expr (&cl->length);
2074 if (peek_atom () != ATOM_RPAREN)
2076 cl = gfc_new_charlen (gfc_current_ns, NULL);
2077 mio_expr (&cl->length);
2086 /* See if a name is a generated name. */
2089 check_unique_name (const char *name)
2091 return *name == '@';
2096 mio_typespec (gfc_typespec *ts)
2100 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2102 if (ts->type != BT_DERIVED && ts->type != BT_CLASS)
2103 mio_integer (&ts->kind);
2105 mio_symbol_ref (&ts->u.derived);
2107 /* Add info for C interop and is_iso_c. */
2108 mio_integer (&ts->is_c_interop);
2109 mio_integer (&ts->is_iso_c);
2111 /* If the typespec is for an identifier either from iso_c_binding, or
2112 a constant that was initialized to an identifier from it, use the
2113 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2115 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2117 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2119 if (ts->type != BT_CHARACTER)
2121 /* ts->u.cl is only valid for BT_CHARACTER. */
2126 mio_charlen (&ts->u.cl);
2132 static const mstring array_spec_types[] = {
2133 minit ("EXPLICIT", AS_EXPLICIT),
2134 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2135 minit ("DEFERRED", AS_DEFERRED),
2136 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2142 mio_array_spec (gfc_array_spec **asp)
2149 if (iomode == IO_OUTPUT)
2157 if (peek_atom () == ATOM_RPAREN)
2163 *asp = as = gfc_get_array_spec ();
2166 mio_integer (&as->rank);
2167 mio_integer (&as->corank);
2168 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2170 for (i = 0; i < as->rank + as->corank; i++)
2172 mio_expr (&as->lower[i]);
2173 mio_expr (&as->upper[i]);
2181 /* Given a pointer to an array reference structure (which lives in a
2182 gfc_ref structure), find the corresponding array specification
2183 structure. Storing the pointer in the ref structure doesn't quite
2184 work when loading from a module. Generating code for an array
2185 reference also needs more information than just the array spec. */
2187 static const mstring array_ref_types[] = {
2188 minit ("FULL", AR_FULL),
2189 minit ("ELEMENT", AR_ELEMENT),
2190 minit ("SECTION", AR_SECTION),
2196 mio_array_ref (gfc_array_ref *ar)
2201 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2202 mio_integer (&ar->dimen);
2210 for (i = 0; i < ar->dimen; i++)
2211 mio_expr (&ar->start[i]);
2216 for (i = 0; i < ar->dimen; i++)
2218 mio_expr (&ar->start[i]);
2219 mio_expr (&ar->end[i]);
2220 mio_expr (&ar->stride[i]);
2226 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2229 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2230 we can't call mio_integer directly. Instead loop over each element
2231 and cast it to/from an integer. */
2232 if (iomode == IO_OUTPUT)
2234 for (i = 0; i < ar->dimen; i++)
2236 int tmp = (int)ar->dimen_type[i];
2237 write_atom (ATOM_INTEGER, &tmp);
2242 for (i = 0; i < ar->dimen; i++)
2244 require_atom (ATOM_INTEGER);
2245 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2249 if (iomode == IO_INPUT)
2251 ar->where = gfc_current_locus;
2253 for (i = 0; i < ar->dimen; i++)
2254 ar->c_where[i] = gfc_current_locus;
2261 /* Saves or restores a pointer. The pointer is converted back and
2262 forth from an integer. We return the pointer_info pointer so that
2263 the caller can take additional action based on the pointer type. */
2265 static pointer_info *
2266 mio_pointer_ref (void *gp)
2270 if (iomode == IO_OUTPUT)
2272 p = get_pointer (*((char **) gp));
2273 write_atom (ATOM_INTEGER, &p->integer);
2277 require_atom (ATOM_INTEGER);
2278 p = add_fixup (atom_int, gp);
2285 /* Save and load references to components that occur within
2286 expressions. We have to describe these references by a number and
2287 by name. The number is necessary for forward references during
2288 reading, and the name is necessary if the symbol already exists in
2289 the namespace and is not loaded again. */
2292 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2294 char name[GFC_MAX_SYMBOL_LEN + 1];
2298 p = mio_pointer_ref (cp);
2299 if (p->type == P_UNKNOWN)
2300 p->type = P_COMPONENT;
2302 if (iomode == IO_OUTPUT)
2303 mio_pool_string (&(*cp)->name);
2306 mio_internal_string (name);
2308 /* It can happen that a component reference can be read before the
2309 associated derived type symbol has been loaded. Return now and
2310 wait for a later iteration of load_needed. */
2314 if (sym->components != NULL && p->u.pointer == NULL)
2316 /* Symbol already loaded, so search by name. */
2317 for (q = sym->components; q; q = q->next)
2318 if (strcmp (q->name, name) == 0)
2322 gfc_internal_error ("mio_component_ref(): Component not found");
2324 associate_integer_pointer (p, q);
2327 /* Make sure this symbol will eventually be loaded. */
2328 p = find_pointer2 (sym);
2329 if (p->u.rsym.state == UNUSED)
2330 p->u.rsym.state = NEEDED;
2335 static void mio_namespace_ref (gfc_namespace **nsp);
2336 static void mio_formal_arglist (gfc_formal_arglist **formal);
2337 static void mio_typebound_proc (gfc_typebound_proc** proc);
2340 mio_component (gfc_component *c)
2344 gfc_formal_arglist *formal;
2348 if (iomode == IO_OUTPUT)
2350 p = get_pointer (c);
2351 mio_integer (&p->integer);
2356 p = get_integer (n);
2357 associate_integer_pointer (p, c);
2360 if (p->type == P_UNKNOWN)
2361 p->type = P_COMPONENT;
2363 mio_pool_string (&c->name);
2364 mio_typespec (&c->ts);
2365 mio_array_spec (&c->as);
2367 mio_symbol_attribute (&c->attr);
2368 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2370 mio_expr (&c->initializer);
2372 if (c->attr.proc_pointer)
2374 if (iomode == IO_OUTPUT)
2377 while (formal && !formal->sym)
2378 formal = formal->next;
2381 mio_namespace_ref (&formal->sym->ns);
2383 mio_namespace_ref (&c->formal_ns);
2387 mio_namespace_ref (&c->formal_ns);
2388 /* TODO: if (c->formal_ns)
2390 c->formal_ns->proc_name = c;
2395 mio_formal_arglist (&c->formal);
2397 mio_typebound_proc (&c->tb);
2405 mio_component_list (gfc_component **cp)
2407 gfc_component *c, *tail;
2411 if (iomode == IO_OUTPUT)
2413 for (c = *cp; c; c = c->next)
2423 if (peek_atom () == ATOM_RPAREN)
2426 c = gfc_get_component ();
2443 mio_actual_arg (gfc_actual_arglist *a)
2446 mio_pool_string (&a->name);
2447 mio_expr (&a->expr);
2453 mio_actual_arglist (gfc_actual_arglist **ap)
2455 gfc_actual_arglist *a, *tail;
2459 if (iomode == IO_OUTPUT)
2461 for (a = *ap; a; a = a->next)
2471 if (peek_atom () != ATOM_LPAREN)
2474 a = gfc_get_actual_arglist ();
2490 /* Read and write formal argument lists. */
2493 mio_formal_arglist (gfc_formal_arglist **formal)
2495 gfc_formal_arglist *f, *tail;
2499 if (iomode == IO_OUTPUT)
2501 for (f = *formal; f; f = f->next)
2502 mio_symbol_ref (&f->sym);
2506 *formal = tail = NULL;
2508 while (peek_atom () != ATOM_RPAREN)
2510 f = gfc_get_formal_arglist ();
2511 mio_symbol_ref (&f->sym);
2513 if (*formal == NULL)
2526 /* Save or restore a reference to a symbol node. */
2529 mio_symbol_ref (gfc_symbol **symp)
2533 p = mio_pointer_ref (symp);
2534 if (p->type == P_UNKNOWN)
2537 if (iomode == IO_OUTPUT)
2539 if (p->u.wsym.state == UNREFERENCED)
2540 p->u.wsym.state = NEEDS_WRITE;
2544 if (p->u.rsym.state == UNUSED)
2545 p->u.rsym.state = NEEDED;
2551 /* Save or restore a reference to a symtree node. */
2554 mio_symtree_ref (gfc_symtree **stp)
2559 if (iomode == IO_OUTPUT)
2560 mio_symbol_ref (&(*stp)->n.sym);
2563 require_atom (ATOM_INTEGER);
2564 p = get_integer (atom_int);
2566 /* An unused equivalence member; make a symbol and a symtree
2568 if (in_load_equiv && p->u.rsym.symtree == NULL)
2570 /* Since this is not used, it must have a unique name. */
2571 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2573 /* Make the symbol. */
2574 if (p->u.rsym.sym == NULL)
2576 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2578 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2581 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2582 p->u.rsym.symtree->n.sym->refs++;
2583 p->u.rsym.referenced = 1;
2585 /* If the symbol is PRIVATE and in COMMON, load_commons will
2586 generate a fixup symbol, which must be associated. */
2588 resolve_fixups (p->fixup, p->u.rsym.sym);
2592 if (p->type == P_UNKNOWN)
2595 if (p->u.rsym.state == UNUSED)
2596 p->u.rsym.state = NEEDED;
2598 if (p->u.rsym.symtree != NULL)
2600 *stp = p->u.rsym.symtree;
2604 f = XCNEW (fixup_t);
2606 f->next = p->u.rsym.stfixup;
2607 p->u.rsym.stfixup = f;
2609 f->pointer = (void **) stp;
2616 mio_iterator (gfc_iterator **ip)
2622 if (iomode == IO_OUTPUT)
2629 if (peek_atom () == ATOM_RPAREN)
2635 *ip = gfc_get_iterator ();
2640 mio_expr (&iter->var);
2641 mio_expr (&iter->start);
2642 mio_expr (&iter->end);
2643 mio_expr (&iter->step);
2651 mio_constructor (gfc_constructor_base *cp)
2657 if (iomode == IO_OUTPUT)
2659 for (c = gfc_constructor_first (*cp); c; c = gfc_constructor_next (c))
2662 mio_expr (&c->expr);
2663 mio_iterator (&c->iterator);
2669 while (peek_atom () != ATOM_RPAREN)
2671 c = gfc_constructor_append_expr (cp, NULL, NULL);
2674 mio_expr (&c->expr);
2675 mio_iterator (&c->iterator);
2684 static const mstring ref_types[] = {
2685 minit ("ARRAY", REF_ARRAY),
2686 minit ("COMPONENT", REF_COMPONENT),
2687 minit ("SUBSTRING", REF_SUBSTRING),
2693 mio_ref (gfc_ref **rp)
2700 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2705 mio_array_ref (&r->u.ar);
2709 mio_symbol_ref (&r->u.c.sym);
2710 mio_component_ref (&r->u.c.component, r->u.c.sym);
2714 mio_expr (&r->u.ss.start);
2715 mio_expr (&r->u.ss.end);
2716 mio_charlen (&r->u.ss.length);
2725 mio_ref_list (gfc_ref **rp)
2727 gfc_ref *ref, *head, *tail;
2731 if (iomode == IO_OUTPUT)
2733 for (ref = *rp; ref; ref = ref->next)
2740 while (peek_atom () != ATOM_RPAREN)
2743 head = tail = gfc_get_ref ();
2746 tail->next = gfc_get_ref ();
2760 /* Read and write an integer value. */
2763 mio_gmp_integer (mpz_t *integer)
2767 if (iomode == IO_INPUT)
2769 if (parse_atom () != ATOM_STRING)
2770 bad_module ("Expected integer string");
2772 mpz_init (*integer);
2773 if (mpz_set_str (*integer, atom_string, 10))
2774 bad_module ("Error converting integer");
2776 gfc_free (atom_string);
2780 p = mpz_get_str (NULL, 10, *integer);
2781 write_atom (ATOM_STRING, p);
2788 mio_gmp_real (mpfr_t *real)
2793 if (iomode == IO_INPUT)
2795 if (parse_atom () != ATOM_STRING)
2796 bad_module ("Expected real string");
2799 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2800 gfc_free (atom_string);
2804 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2806 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2808 write_atom (ATOM_STRING, p);
2813 atom_string = XCNEWVEC (char, strlen (p) + 20);
2815 sprintf (atom_string, "0.%s@%ld", p, exponent);
2817 /* Fix negative numbers. */
2818 if (atom_string[2] == '-')
2820 atom_string[0] = '-';
2821 atom_string[1] = '0';
2822 atom_string[2] = '.';
2825 write_atom (ATOM_STRING, atom_string);
2827 gfc_free (atom_string);
2833 /* Save and restore the shape of an array constructor. */
2836 mio_shape (mpz_t **pshape, int rank)
2842 /* A NULL shape is represented by (). */
2845 if (iomode == IO_OUTPUT)
2857 if (t == ATOM_RPAREN)
2864 shape = gfc_get_shape (rank);
2868 for (n = 0; n < rank; n++)
2869 mio_gmp_integer (&shape[n]);
2875 static const mstring expr_types[] = {
2876 minit ("OP", EXPR_OP),
2877 minit ("FUNCTION", EXPR_FUNCTION),
2878 minit ("CONSTANT", EXPR_CONSTANT),
2879 minit ("VARIABLE", EXPR_VARIABLE),
2880 minit ("SUBSTRING", EXPR_SUBSTRING),
2881 minit ("STRUCTURE", EXPR_STRUCTURE),
2882 minit ("ARRAY", EXPR_ARRAY),
2883 minit ("NULL", EXPR_NULL),
2884 minit ("COMPCALL", EXPR_COMPCALL),
2888 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2889 generic operators, not in expressions. INTRINSIC_USER is also
2890 replaced by the correct function name by the time we see it. */
2892 static const mstring intrinsics[] =
2894 minit ("UPLUS", INTRINSIC_UPLUS),
2895 minit ("UMINUS", INTRINSIC_UMINUS),
2896 minit ("PLUS", INTRINSIC_PLUS),
2897 minit ("MINUS", INTRINSIC_MINUS),
2898 minit ("TIMES", INTRINSIC_TIMES),
2899 minit ("DIVIDE", INTRINSIC_DIVIDE),
2900 minit ("POWER", INTRINSIC_POWER),
2901 minit ("CONCAT", INTRINSIC_CONCAT),
2902 minit ("AND", INTRINSIC_AND),
2903 minit ("OR", INTRINSIC_OR),
2904 minit ("EQV", INTRINSIC_EQV),
2905 minit ("NEQV", INTRINSIC_NEQV),
2906 minit ("EQ_SIGN", INTRINSIC_EQ),
2907 minit ("EQ", INTRINSIC_EQ_OS),
2908 minit ("NE_SIGN", INTRINSIC_NE),
2909 minit ("NE", INTRINSIC_NE_OS),
2910 minit ("GT_SIGN", INTRINSIC_GT),
2911 minit ("GT", INTRINSIC_GT_OS),
2912 minit ("GE_SIGN", INTRINSIC_GE),
2913 minit ("GE", INTRINSIC_GE_OS),
2914 minit ("LT_SIGN", INTRINSIC_LT),
2915 minit ("LT", INTRINSIC_LT_OS),
2916 minit ("LE_SIGN", INTRINSIC_LE),
2917 minit ("LE", INTRINSIC_LE_OS),
2918 minit ("NOT", INTRINSIC_NOT),
2919 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2924 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2927 fix_mio_expr (gfc_expr *e)
2929 gfc_symtree *ns_st = NULL;
2932 if (iomode != IO_OUTPUT)
2937 /* If this is a symtree for a symbol that came from a contained module
2938 namespace, it has a unique name and we should look in the current
2939 namespace to see if the required, non-contained symbol is available
2940 yet. If so, the latter should be written. */
2941 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2942 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2943 e->symtree->n.sym->name);
2945 /* On the other hand, if the existing symbol is the module name or the
2946 new symbol is a dummy argument, do not do the promotion. */
2947 if (ns_st && ns_st->n.sym
2948 && ns_st->n.sym->attr.flavor != FL_MODULE
2949 && !e->symtree->n.sym->attr.dummy)
2952 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2956 /* In some circumstances, a function used in an initialization
2957 expression, in one use associated module, can fail to be
2958 coupled to its symtree when used in a specification
2959 expression in another module. */
2960 fname = e->value.function.esym ? e->value.function.esym->name
2961 : e->value.function.isym->name;
2962 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2967 /* This is probably a reference to a private procedure from another
2968 module. To prevent a segfault, make a generic with no specific
2969 instances. If this module is used, without the required
2970 specific coming from somewhere, the appropriate error message
2972 gfc_get_symbol (fname, gfc_current_ns, &sym);
2973 sym->attr.flavor = FL_PROCEDURE;
2974 sym->attr.generic = 1;
2975 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2980 /* Read and write expressions. The form "()" is allowed to indicate a
2984 mio_expr (gfc_expr **ep)
2992 if (iomode == IO_OUTPUT)
3001 MIO_NAME (expr_t) (e->expr_type, expr_types);
3006 if (t == ATOM_RPAREN)
3013 bad_module ("Expected expression type");
3015 e = *ep = gfc_get_expr ();
3016 e->where = gfc_current_locus;
3017 e->expr_type = (expr_t) find_enum (expr_types);
3020 mio_typespec (&e->ts);
3021 mio_integer (&e->rank);
3025 switch (e->expr_type)
3029 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
3031 switch (e->value.op.op)
3033 case INTRINSIC_UPLUS:
3034 case INTRINSIC_UMINUS:
3036 case INTRINSIC_PARENTHESES:
3037 mio_expr (&e->value.op.op1);
3040 case INTRINSIC_PLUS:
3041 case INTRINSIC_MINUS:
3042 case INTRINSIC_TIMES:
3043 case INTRINSIC_DIVIDE:
3044 case INTRINSIC_POWER:
3045 case INTRINSIC_CONCAT:
3049 case INTRINSIC_NEQV:
3051 case INTRINSIC_EQ_OS:
3053 case INTRINSIC_NE_OS:
3055 case INTRINSIC_GT_OS:
3057 case INTRINSIC_GE_OS:
3059 case INTRINSIC_LT_OS:
3061 case INTRINSIC_LE_OS:
3062 mio_expr (&e->value.op.op1);
3063 mio_expr (&e->value.op.op2);
3067 bad_module ("Bad operator");
3073 mio_symtree_ref (&e->symtree);
3074 mio_actual_arglist (&e->value.function.actual);
3076 if (iomode == IO_OUTPUT)
3078 e->value.function.name
3079 = mio_allocated_string (e->value.function.name);
3080 flag = e->value.function.esym != NULL;
3081 mio_integer (&flag);
3083 mio_symbol_ref (&e->value.function.esym);
3085 write_atom (ATOM_STRING, e->value.function.isym->name);
3089 require_atom (ATOM_STRING);
3090 e->value.function.name = gfc_get_string (atom_string);
3091 gfc_free (atom_string);
3093 mio_integer (&flag);
3095 mio_symbol_ref (&e->value.function.esym);
3098 require_atom (ATOM_STRING);
3099 e->value.function.isym = gfc_find_function (atom_string);
3100 gfc_free (atom_string);
3107 mio_symtree_ref (&e->symtree);
3108 mio_ref_list (&e->ref);
3111 case EXPR_SUBSTRING:
3112 e->value.character.string
3113 = CONST_CAST (gfc_char_t *,
3114 mio_allocated_wide_string (e->value.character.string,
3115 e->value.character.length));
3116 mio_ref_list (&e->ref);
3119 case EXPR_STRUCTURE:
3121 mio_constructor (&e->value.constructor);
3122 mio_shape (&e->shape, e->rank);
3129 mio_gmp_integer (&e->value.integer);
3133 gfc_set_model_kind (e->ts.kind);
3134 mio_gmp_real (&e->value.real);
3138 gfc_set_model_kind (e->ts.kind);
3139 mio_gmp_real (&mpc_realref (e->value.complex));
3140 mio_gmp_real (&mpc_imagref (e->value.complex));
3144 mio_integer (&e->value.logical);
3148 mio_integer (&e->value.character.length);
3149 e->value.character.string
3150 = CONST_CAST (gfc_char_t *,
3151 mio_allocated_wide_string (e->value.character.string,
3152 e->value.character.length));
3156 bad_module ("Bad type in constant expression");
3174 /* Read and write namelists. */
3177 mio_namelist (gfc_symbol *sym)
3179 gfc_namelist *n, *m;
3180 const char *check_name;
3184 if (iomode == IO_OUTPUT)
3186 for (n = sym->namelist; n; n = n->next)
3187 mio_symbol_ref (&n->sym);
3191 /* This departure from the standard is flagged as an error.
3192 It does, in fact, work correctly. TODO: Allow it
3194 if (sym->attr.flavor == FL_NAMELIST)
3196 check_name = find_use_name (sym->name, false);
3197 if (check_name && strcmp (check_name, sym->name) != 0)
3198 gfc_error ("Namelist %s cannot be renamed by USE "
3199 "association to %s", sym->name, check_name);
3203 while (peek_atom () != ATOM_RPAREN)
3205 n = gfc_get_namelist ();
3206 mio_symbol_ref (&n->sym);
3208 if (sym->namelist == NULL)
3215 sym->namelist_tail = m;
3222 /* Save/restore lists of gfc_interface structures. When loading an
3223 interface, we are really appending to the existing list of
3224 interfaces. Checking for duplicate and ambiguous interfaces has to
3225 be done later when all symbols have been loaded. */
3228 mio_interface_rest (gfc_interface **ip)
3230 gfc_interface *tail, *p;
3231 pointer_info *pi = NULL;
3233 if (iomode == IO_OUTPUT)
3236 for (p = *ip; p; p = p->next)
3237 mio_symbol_ref (&p->sym);
3252 if (peek_atom () == ATOM_RPAREN)
3255 p = gfc_get_interface ();
3256 p->where = gfc_current_locus;
3257 pi = mio_symbol_ref (&p->sym);
3273 /* Save/restore a nameless operator interface. */
3276 mio_interface (gfc_interface **ip)
3279 mio_interface_rest (ip);
3283 /* Save/restore a named operator interface. */
3286 mio_symbol_interface (const char **name, const char **module,
3290 mio_pool_string (name);
3291 mio_pool_string (module);
3292 mio_interface_rest (ip);
3297 mio_namespace_ref (gfc_namespace **nsp)
3302 p = mio_pointer_ref (nsp);
3304 if (p->type == P_UNKNOWN)
3305 p->type = P_NAMESPACE;
3307 if (iomode == IO_INPUT && p->integer != 0)
3309 ns = (gfc_namespace *) p->u.pointer;
3312 ns = gfc_get_namespace (NULL, 0);
3313 associate_integer_pointer (p, ns);
3321 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3323 static gfc_namespace* current_f2k_derived;
3326 mio_typebound_proc (gfc_typebound_proc** proc)
3329 int overriding_flag;
3331 if (iomode == IO_INPUT)
3333 *proc = gfc_get_typebound_proc (NULL);
3334 (*proc)->where = gfc_current_locus;
3340 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3342 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3343 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3344 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3345 overriding_flag = mio_name (overriding_flag, binding_overriding);
3346 (*proc)->deferred = ((overriding_flag & 2) != 0);
3347 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3348 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3350 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3351 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3352 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3354 mio_pool_string (&((*proc)->pass_arg));
3356 flag = (int) (*proc)->pass_arg_num;
3357 mio_integer (&flag);
3358 (*proc)->pass_arg_num = (unsigned) flag;
3360 if ((*proc)->is_generic)
3366 if (iomode == IO_OUTPUT)
3367 for (g = (*proc)->u.generic; g; g = g->next)
3368 mio_allocated_string (g->specific_st->name);
3371 (*proc)->u.generic = NULL;
3372 while (peek_atom () != ATOM_RPAREN)
3374 gfc_symtree** sym_root;
3376 g = gfc_get_tbp_generic ();
3379 require_atom (ATOM_STRING);
3380 sym_root = ¤t_f2k_derived->tb_sym_root;
3381 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3382 gfc_free (atom_string);
3384 g->next = (*proc)->u.generic;
3385 (*proc)->u.generic = g;
3391 else if (!(*proc)->ppc)
3392 mio_symtree_ref (&(*proc)->u.specific);
3397 /* Walker-callback function for this purpose. */
3399 mio_typebound_symtree (gfc_symtree* st)
3401 if (iomode == IO_OUTPUT && !st->n.tb)
3404 if (iomode == IO_OUTPUT)
3407 mio_allocated_string (st->name);
3409 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3411 mio_typebound_proc (&st->n.tb);
3415 /* IO a full symtree (in all depth). */
3417 mio_full_typebound_tree (gfc_symtree** root)
3421 if (iomode == IO_OUTPUT)
3422 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3425 while (peek_atom () == ATOM_LPAREN)
3431 require_atom (ATOM_STRING);
3432 st = gfc_get_tbp_symtree (root, atom_string);
3433 gfc_free (atom_string);
3435 mio_typebound_symtree (st);
3443 mio_finalizer (gfc_finalizer **f)
3445 if (iomode == IO_OUTPUT)
3448 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3449 mio_symtree_ref (&(*f)->proc_tree);
3453 *f = gfc_get_finalizer ();
3454 (*f)->where = gfc_current_locus; /* Value should not matter. */
3457 mio_symtree_ref (&(*f)->proc_tree);
3458 (*f)->proc_sym = NULL;
3463 mio_f2k_derived (gfc_namespace *f2k)
3465 current_f2k_derived = f2k;
3467 /* Handle the list of finalizer procedures. */
3469 if (iomode == IO_OUTPUT)
3472 for (f = f2k->finalizers; f; f = f->next)
3477 f2k->finalizers = NULL;
3478 while (peek_atom () != ATOM_RPAREN)
3480 gfc_finalizer *cur = NULL;
3481 mio_finalizer (&cur);
3482 cur->next = f2k->finalizers;
3483 f2k->finalizers = cur;
3488 /* Handle type-bound procedures. */
3489 mio_full_typebound_tree (&f2k->tb_sym_root);
3491 /* Type-bound user operators. */
3492 mio_full_typebound_tree (&f2k->tb_uop_root);
3494 /* Type-bound intrinsic operators. */
3496 if (iomode == IO_OUTPUT)
3499 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3501 gfc_intrinsic_op realop;
3503 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3507 realop = (gfc_intrinsic_op) op;
3508 mio_intrinsic_op (&realop);
3509 mio_typebound_proc (&f2k->tb_op[op]);
3514 while (peek_atom () != ATOM_RPAREN)
3516 gfc_intrinsic_op op = GFC_INTRINSIC_BEGIN; /* Silence GCC. */
3519 mio_intrinsic_op (&op);
3520 mio_typebound_proc (&f2k->tb_op[op]);
3527 mio_full_f2k_derived (gfc_symbol *sym)
3531 if (iomode == IO_OUTPUT)
3533 if (sym->f2k_derived)
3534 mio_f2k_derived (sym->f2k_derived);
3538 if (peek_atom () != ATOM_RPAREN)
3540 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3541 mio_f2k_derived (sym->f2k_derived);
3544 gcc_assert (!sym->f2k_derived);
3551 /* Unlike most other routines, the address of the symbol node is already
3552 fixed on input and the name/module has already been filled in. */
3555 mio_symbol (gfc_symbol *sym)
3557 int intmod = INTMOD_NONE;
3561 mio_symbol_attribute (&sym->attr);
3562 mio_typespec (&sym->ts);
3564 if (iomode == IO_OUTPUT)
3565 mio_namespace_ref (&sym->formal_ns);
3568 mio_namespace_ref (&sym->formal_ns);
3571 sym->formal_ns->proc_name = sym;
3576 /* Save/restore common block links. */
3577 mio_symbol_ref (&sym->common_next);
3579 mio_formal_arglist (&sym->formal);
3581 if (sym->attr.flavor == FL_PARAMETER)
3582 mio_expr (&sym->value);
3584 mio_array_spec (&sym->as);
3586 mio_symbol_ref (&sym->result);
3588 if (sym->attr.cray_pointee)
3589 mio_symbol_ref (&sym->cp_pointer);
3591 /* Note that components are always saved, even if they are supposed
3592 to be private. Component access is checked during searching. */
3594 mio_component_list (&sym->components);
3596 if (sym->components != NULL)
3597 sym->component_access
3598 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3600 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3601 mio_full_f2k_derived (sym);
3605 /* Add the fields that say whether this is from an intrinsic module,
3606 and if so, what symbol it is within the module. */
3607 /* mio_integer (&(sym->from_intmod)); */
3608 if (iomode == IO_OUTPUT)
3610 intmod = sym->from_intmod;
3611 mio_integer (&intmod);
3615 mio_integer (&intmod);
3616 sym->from_intmod = (intmod_id) intmod;
3619 mio_integer (&(sym->intmod_sym_id));
3621 if (sym->attr.flavor == FL_DERIVED)
3622 mio_integer (&(sym->hash_value));
3628 /************************* Top level subroutines *************************/
3630 /* Given a root symtree node and a symbol, try to find a symtree that
3631 references the symbol that is not a unique name. */
3633 static gfc_symtree *
3634 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3636 gfc_symtree *s = NULL;
3641 s = find_symtree_for_symbol (st->right, sym);
3644 s = find_symtree_for_symbol (st->left, sym);
3648 if (st->n.sym == sym && !check_unique_name (st->name))
3655 /* A recursive function to look for a specific symbol by name and by
3656 module. Whilst several symtrees might point to one symbol, its
3657 is sufficient for the purposes here than one exist. Note that
3658 generic interfaces are distinguished as are symbols that have been
3659 renamed in another module. */
3660 static gfc_symtree *
3661 find_symbol (gfc_symtree *st, const char *name,
3662 const char *module, int generic)
3665 gfc_symtree *retval, *s;
3667 if (st == NULL || st->n.sym == NULL)
3670 c = strcmp (name, st->n.sym->name);
3671 if (c == 0 && st->n.sym->module
3672 && strcmp (module, st->n.sym->module) == 0
3673 && !check_unique_name (st->name))
3675 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3677 /* Detect symbols that are renamed by use association in another
3678 module by the absence of a symtree and null attr.use_rename,
3679 since the latter is not transmitted in the module file. */
3680 if (((!generic && !st->n.sym->attr.generic)
3681 || (generic && st->n.sym->attr.generic))
3682 && !(s == NULL && !st->n.sym->attr.use_rename))
3686 retval = find_symbol (st->left, name, module, generic);
3689 retval = find_symbol (st->right, name, module, generic);
3695 /* Skip a list between balanced left and right parens. */
3705 switch (parse_atom ())
3716 gfc_free (atom_string);
3728 /* Load operator interfaces from the module. Interfaces are unusual
3729 in that they attach themselves to existing symbols. */
3732 load_operator_interfaces (void)
3735 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3737 pointer_info *pi = NULL;
3742 while (peek_atom () != ATOM_RPAREN)
3746 mio_internal_string (name);
3747 mio_internal_string (module);
3749 n = number_use_names (name, true);
3752 for (i = 1; i <= n; i++)
3754 /* Decide if we need to load this one or not. */
3755 p = find_use_name_n (name, &i, true);
3759 while (parse_atom () != ATOM_RPAREN);
3765 uop = gfc_get_uop (p);
3766 pi = mio_interface_rest (&uop->op);
3770 if (gfc_find_uop (p, NULL))
3772 uop = gfc_get_uop (p);
3773 uop->op = gfc_get_interface ();
3774 uop->op->where = gfc_current_locus;
3775 add_fixup (pi->integer, &uop->op->sym);
3784 /* Load interfaces from the module. Interfaces are unusual in that
3785 they attach themselves to existing symbols. */
3788 load_generic_interfaces (void)
3791 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3793 gfc_interface *generic = NULL, *gen = NULL;
3795 bool ambiguous_set = false;
3799 while (peek_atom () != ATOM_RPAREN)
3803 mio_internal_string (name);
3804 mio_internal_string (module);
3806 n = number_use_names (name, false);
3807 renamed = n ? 1 : 0;
3810 for (i = 1; i <= n; i++)
3813 /* Decide if we need to load this one or not. */
3814 p = find_use_name_n (name, &i, false);
3816 st = find_symbol (gfc_current_ns->sym_root,
3817 name, module_name, 1);
3819 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3821 /* Skip the specific names for these cases. */
3822 while (i == 1 && parse_atom () != ATOM_RPAREN);
3827 /* If the symbol exists already and is being USEd without being
3828 in an ONLY clause, do not load a new symtree(11.3.2). */
3829 if (!only_flag && st)
3834 /* Make the symbol inaccessible if it has been added by a USE
3835 statement without an ONLY(11.3.2). */
3837 && !st->n.sym->attr.use_only
3838 && !st->n.sym->attr.use_rename
3839 && strcmp (st->n.sym->module, module_name) == 0)
3842 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3843 st = gfc_get_unique_symtree (gfc_current_ns);
3850 if (strcmp (st->name, p) != 0)
3852 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3858 /* Since we haven't found a valid generic interface, we had
3862 gfc_get_symbol (p, NULL, &sym);
3863 sym->name = gfc_get_string (name);
3864 sym->module = gfc_get_string (module_name);
3865 sym->attr.flavor = FL_PROCEDURE;
3866 sym->attr.generic = 1;
3867 sym->attr.use_assoc = 1;
3872 /* Unless sym is a generic interface, this reference
3875 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3879 if (st && !sym->attr.generic
3882 && strcmp(module, sym->module))
3884 ambiguous_set = true;
3889 sym->attr.use_only = only_flag;
3890 sym->attr.use_rename = renamed;
3894 mio_interface_rest (&sym->generic);
3895 generic = sym->generic;
3897 else if (!sym->generic)
3899 sym->generic = generic;
3900 sym->attr.generic_copy = 1;
3903 /* If a procedure that is not generic has generic interfaces
3904 that include itself, it is generic! We need to take care
3905 to retain symbols ambiguous that were already so. */
3906 if (sym->attr.use_assoc
3907 && !sym->attr.generic
3908 && sym->attr.flavor == FL_PROCEDURE)
3910 for (gen = generic; gen; gen = gen->next)
3912 if (gen->sym == sym)
3914 sym->attr.generic = 1;
3929 /* Load common blocks. */
3934 char name[GFC_MAX_SYMBOL_LEN + 1];
3939 while (peek_atom () != ATOM_RPAREN)
3943 mio_internal_string (name);
3945 p = gfc_get_common (name, 1);
3947 mio_symbol_ref (&p->head);
3948 mio_integer (&flags);
3952 p->threadprivate = 1;
3955 /* Get whether this was a bind(c) common or not. */
3956 mio_integer (&p->is_bind_c);
3957 /* Get the binding label. */
3958 mio_internal_string (p->binding_label);
3967 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3968 so that unused variables are not loaded and so that the expression can
3974 gfc_equiv *head, *tail, *end, *eq;
3978 in_load_equiv = true;
3980 end = gfc_current_ns->equiv;
3981 while (end != NULL && end->next != NULL)
3984 while (peek_atom () != ATOM_RPAREN) {
3988 while(peek_atom () != ATOM_RPAREN)
3991 head = tail = gfc_get_equiv ();
3994 tail->eq = gfc_get_equiv ();
3998 mio_pool_string (&tail->module);
3999 mio_expr (&tail->expr);
4002 /* Unused equivalence members have a unique name. In addition, it
4003 must be checked that the symbols are from the same module. */
4005 for (eq = head; eq; eq = eq->eq)
4007 if (eq->expr->symtree->n.sym->module
4008 && head->expr->symtree->n.sym->module
4009 && strcmp (head->expr->symtree->n.sym->module,
4010 eq->expr->symtree->n.sym->module) == 0
4011 && !check_unique_name (eq->expr->symtree->name))
4020 for (eq = head; eq; eq = head)
4023 gfc_free_expr (eq->expr);
4029 gfc_current_ns->equiv = head;
4040 in_load_equiv = false;
4044 /* This function loads the sym_root of f2k_derived with the extensions to
4045 the derived type. */
4047 load_derived_extensions (void)
4050 gfc_symbol *derived;
4054 char name[GFC_MAX_SYMBOL_LEN + 1];
4055 char module[GFC_MAX_SYMBOL_LEN + 1];
4059 while (peek_atom () != ATOM_RPAREN)
4062 mio_integer (&symbol);
4063 info = get_integer (symbol);
4064 derived = info->u.rsym.sym;
4066 /* This one is not being loaded. */
4067 if (!info || !derived)
4069 while (peek_atom () != ATOM_RPAREN)
4074 gcc_assert (derived->attr.flavor == FL_DERIVED);
4075 if (derived->f2k_derived == NULL)
4076 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4078 while (peek_atom () != ATOM_RPAREN)
4081 mio_internal_string (name);
4082 mio_internal_string (module);
4084 /* Only use one use name to find the symbol. */
4086 p = find_use_name_n (name, &j, false);
4089 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4091 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4094 /* Only use the real name in f2k_derived to ensure a single
4096 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4109 /* Recursive function to traverse the pointer_info tree and load a
4110 needed symbol. We return nonzero if we load a symbol and stop the
4111 traversal, because the act of loading can alter the tree. */
4114 load_needed (pointer_info *p)
4125 rv |= load_needed (p->left);
4126 rv |= load_needed (p->right);
4128 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4131 p->u.rsym.state = USED;
4133 set_module_locus (&p->u.rsym.where);
4135 sym = p->u.rsym.sym;
4138 q = get_integer (p->u.rsym.ns);
4140 ns = (gfc_namespace *) q->u.pointer;
4143 /* Create an interface namespace if necessary. These are
4144 the namespaces that hold the formal parameters of module
4147 ns = gfc_get_namespace (NULL, 0);
4148 associate_integer_pointer (q, ns);
4151 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4152 doesn't go pear-shaped if the symbol is used. */
4154 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4157 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4158 sym->module = gfc_get_string (p->u.rsym.module);
4159 strcpy (sym->binding_label, p->u.rsym.binding_label);
4161 associate_integer_pointer (p, sym);
4165 sym->attr.use_assoc = 1;
4167 sym->attr.use_only = 1;
4168 if (p->u.rsym.renamed)
4169 sym->attr.use_rename = 1;
4175 /* Recursive function for cleaning up things after a module has been read. */
4178 read_cleanup (pointer_info *p)
4186 read_cleanup (p->left);
4187 read_cleanup (p->right);
4189 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4191 /* Add hidden symbols to the symtree. */
4192 q = get_integer (p->u.rsym.ns);
4193 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
4195 st->n.sym = p->u.rsym.sym;
4198 /* Fixup any symtree references. */
4199 p->u.rsym.symtree = st;
4200 resolve_fixups (p->u.rsym.stfixup, st);
4201 p->u.rsym.stfixup = NULL;
4204 /* Free unused symbols. */
4205 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4206 gfc_free_symbol (p->u.rsym.sym);
4210 /* It is not quite enough to check for ambiguity in the symbols by
4211 the loaded symbol and the new symbol not being identical. */
4213 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4217 symbol_attribute attr;
4219 rsym = info->u.rsym.sym;
4223 if (st_sym->attr.vtab || st_sym->attr.vtype)
4226 /* If the existing symbol is generic from a different module and
4227 the new symbol is generic there can be no ambiguity. */
4228 if (st_sym->attr.generic
4230 && strcmp (st_sym->module, module_name))
4232 /* The new symbol's attributes have not yet been read. Since
4233 we need attr.generic, read it directly. */
4234 get_module_locus (&locus);
4235 set_module_locus (&info->u.rsym.where);
4238 mio_symbol_attribute (&attr);
4239 set_module_locus (&locus);
4248 /* Read a module file. */
4253 module_locus operator_interfaces, user_operators, extensions;
4255 char name[GFC_MAX_SYMBOL_LEN + 1];
4257 int ambiguous, j, nuse, symbol;
4258 pointer_info *info, *q;
4263 get_module_locus (&operator_interfaces); /* Skip these for now. */
4266 get_module_locus (&user_operators);
4270 /* Skip commons, equivalences and derived type extensions for now. */
4274 get_module_locus (&extensions);
4279 /* Create the fixup nodes for all the symbols. */
4281 while (peek_atom () != ATOM_RPAREN)
4283 require_atom (ATOM_INTEGER);
4284 info = get_integer (atom_int);
4286 info->type = P_SYMBOL;
4287 info->u.rsym.state = UNUSED;
4289 mio_internal_string (info->u.rsym.true_name);
4290 mio_internal_string (info->u.rsym.module);
4291 mio_internal_string (info->u.rsym.binding_label);
4294 require_atom (ATOM_INTEGER);
4295 info->u.rsym.ns = atom_int;
4297 get_module_locus (&info->u.rsym.where);
4300 /* See if the symbol has already been loaded by a previous module.
4301 If so, we reference the existing symbol and prevent it from
4302 being loaded again. This should not happen if the symbol being
4303 read is an index for an assumed shape dummy array (ns != 1). */
4305 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4308 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4311 info->u.rsym.state = USED;
4312 info->u.rsym.sym = sym;
4314 /* Some symbols do not have a namespace (eg. formal arguments),
4315 so the automatic "unique symtree" mechanism must be suppressed
4316 by marking them as referenced. */
4317 q = get_integer (info->u.rsym.ns);
4318 if (q->u.pointer == NULL)
4320 info->u.rsym.referenced = 1;
4324 /* If possible recycle the symtree that references the symbol.
4325 If a symtree is not found and the module does not import one,
4326 a unique-name symtree is found by read_cleanup. */
4327 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4330 info->u.rsym.symtree = st;
4331 info->u.rsym.referenced = 1;
4337 /* Parse the symtree lists. This lets us mark which symbols need to
4338 be loaded. Renaming is also done at this point by replacing the
4343 while (peek_atom () != ATOM_RPAREN)
4345 mio_internal_string (name);
4346 mio_integer (&ambiguous);
4347 mio_integer (&symbol);
4349 info = get_integer (symbol);
4351 /* See how many use names there are. If none, go through the start
4352 of the loop at least once. */
4353 nuse = number_use_names (name, false);
4354 info->u.rsym.renamed = nuse ? 1 : 0;
4359 for (j = 1; j <= nuse; j++)
4361 /* Get the jth local name for this symbol. */
4362 p = find_use_name_n (name, &j, false);
4364 if (p == NULL && strcmp (name, module_name) == 0)
4367 /* Skip symtree nodes not in an ONLY clause, unless there
4368 is an existing symtree loaded from another USE statement. */
4371 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4373 info->u.rsym.symtree = st;
4377 /* If a symbol of the same name and module exists already,
4378 this symbol, which is not in an ONLY clause, must not be
4379 added to the namespace(11.3.2). Note that find_symbol
4380 only returns the first occurrence that it finds. */
4381 if (!only_flag && !info->u.rsym.renamed
4382 && strcmp (name, module_name) != 0
4383 && find_symbol (gfc_current_ns->sym_root, name,
4387 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4391 /* Check for ambiguous symbols. */
4392 if (check_for_ambiguous (st->n.sym, info))
4394 info->u.rsym.symtree = st;
4398 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4400 /* Delete the symtree if the symbol has been added by a USE
4401 statement without an ONLY(11.3.2). Remember that the rsym
4402 will be the same as the symbol found in the symtree, for
4404 if (st && (only_flag || info->u.rsym.renamed)
4405 && !st->n.sym->attr.use_only
4406 && !st->n.sym->attr.use_rename
4407 && info->u.rsym.sym == st->n.sym)
4408 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4410 /* Create a symtree node in the current namespace for this
4412 st = check_unique_name (p)
4413 ? gfc_get_unique_symtree (gfc_current_ns)
4414 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4415 st->ambiguous = ambiguous;
4417 sym = info->u.rsym.sym;
4419 /* Create a symbol node if it doesn't already exist. */
4422 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4424 sym = info->u.rsym.sym;
4425 sym->module = gfc_get_string (info->u.rsym.module);
4427 /* TODO: hmm, can we test this? Do we know it will be
4428 initialized to zeros? */
4429 if (info->u.rsym.binding_label[0] != '\0')
4430 strcpy (sym->binding_label, info->u.rsym.binding_label);
4436 if (strcmp (name, p) != 0)
4437 sym->attr.use_rename = 1;
4439 /* We need to set the only_flag here so that symbols from the
4440 same USE...ONLY but earlier are not deleted from the tree in
4441 the gfc_delete_symtree above. */
4442 sym->attr.use_only = only_flag;
4444 /* Store the symtree pointing to this symbol. */
4445 info->u.rsym.symtree = st;
4447 if (info->u.rsym.state == UNUSED)
4448 info->u.rsym.state = NEEDED;
4449 info->u.rsym.referenced = 1;
4456 /* Load intrinsic operator interfaces. */
4457 set_module_locus (&operator_interfaces);
4460 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4462 if (i == INTRINSIC_USER)
4467 u = find_use_operator ((gfc_intrinsic_op) i);
4478 mio_interface (&gfc_current_ns->op[i]);
4483 /* Load generic and user operator interfaces. These must follow the
4484 loading of symtree because otherwise symbols can be marked as
4487 set_module_locus (&user_operators);
4489 load_operator_interfaces ();
4490 load_generic_interfaces ();
4495 /* At this point, we read those symbols that are needed but haven't
4496 been loaded yet. If one symbol requires another, the other gets
4497 marked as NEEDED if its previous state was UNUSED. */
4499 while (load_needed (pi_root));
4501 /* Make sure all elements of the rename-list were found in the module. */
4503 for (u = gfc_rename_list; u; u = u->next)
4508 if (u->op == INTRINSIC_NONE)
4510 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4511 u->use_name, &u->where, module_name);
4515 if (u->op == INTRINSIC_USER)
4517 gfc_error ("User operator '%s' referenced at %L not found "
4518 "in module '%s'", u->use_name, &u->where, module_name);
4522 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4523 "in module '%s'", gfc_op2string (u->op), &u->where,
4527 /* Now we should be in a position to fill f2k_derived with derived type
4528 extensions, since everything has been loaded. */
4529 set_module_locus (&extensions);
4530 load_derived_extensions ();
4532 /* Clean up symbol nodes that were never loaded, create references
4533 to hidden symbols. */
4535 read_cleanup (pi_root);
4539 /* Given an access type that is specific to an entity and the default
4540 access, return nonzero if the entity is publicly accessible. If the
4541 element is declared as PUBLIC, then it is public; if declared
4542 PRIVATE, then private, and otherwise it is public unless the default
4543 access in this context has been declared PRIVATE. */
4546 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4548 if (specific_access == ACCESS_PUBLIC)
4550 if (specific_access == ACCESS_PRIVATE)
4553 if (gfc_option.flag_module_private)
4554 return default_access == ACCESS_PUBLIC;
4556 return default_access != ACCESS_PRIVATE;
4560 /* A structure to remember which commons we've already written. */
4562 struct written_common
4564 BBT_HEADER(written_common);
4565 const char *name, *label;
4568 static struct written_common *written_commons = NULL;
4570 /* Comparison function used for balancing the binary tree. */
4573 compare_written_commons (void *a1, void *b1)
4575 const char *aname = ((struct written_common *) a1)->name;
4576 const char *alabel = ((struct written_common *) a1)->label;
4577 const char *bname = ((struct written_common *) b1)->name;
4578 const char *blabel = ((struct written_common *) b1)->label;
4579 int c = strcmp (aname, bname);
4581 return (c != 0 ? c : strcmp (alabel, blabel));
4584 /* Free a list of written commons. */
4587 free_written_common (struct written_common *w)
4593 free_written_common (w->left);
4595 free_written_common (w->right);
4600 /* Write a common block to the module -- recursive helper function. */
4603 write_common_0 (gfc_symtree *st, bool this_module)
4609 struct written_common *w;
4610 bool write_me = true;
4615 write_common_0 (st->left, this_module);
4617 /* We will write out the binding label, or the name if no label given. */
4618 name = st->n.common->name;
4620 label = p->is_bind_c ? p->binding_label : p->name;
4622 /* Check if we've already output this common. */
4623 w = written_commons;
4626 int c = strcmp (name, w->name);
4627 c = (c != 0 ? c : strcmp (label, w->label));
4631 w = (c < 0) ? w->left : w->right;
4634 if (this_module && p->use_assoc)
4639 /* Write the common to the module. */
4641 mio_pool_string (&name);
4643 mio_symbol_ref (&p->head);
4644 flags = p->saved ? 1 : 0;
4645 if (p->threadprivate)
4647 mio_integer (&flags);
4649 /* Write out whether the common block is bind(c) or not. */
4650 mio_integer (&(p->is_bind_c));
4652 mio_pool_string (&label);
4655 /* Record that we have written this common. */
4656 w = XCNEW (struct written_common);
4659 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4662 write_common_0 (st->right, this_module);
4666 /* Write a common, by initializing the list of written commons, calling
4667 the recursive function write_common_0() and cleaning up afterwards. */
4670 write_common (gfc_symtree *st)
4672 written_commons = NULL;
4673 write_common_0 (st, true);
4674 write_common_0 (st, false);
4675 free_written_common (written_commons);
4676 written_commons = NULL;
4680 /* Write the blank common block to the module. */
4683 write_blank_common (void)
4685 const char * name = BLANK_COMMON_NAME;
4687 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4688 this, but it hasn't been checked. Just making it so for now. */
4691 if (gfc_current_ns->blank_common.head == NULL)
4696 mio_pool_string (&name);
4698 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4699 saved = gfc_current_ns->blank_common.saved;
4700 mio_integer (&saved);
4702 /* Write out whether the common block is bind(c) or not. */
4703 mio_integer (&is_bind_c);
4705 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4706 it doesn't matter because the label isn't used. */
4707 mio_pool_string (&name);
4713 /* Write equivalences to the module. */
4722 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4726 for (e = eq; e; e = e->eq)
4728 if (e->module == NULL)
4729 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4730 mio_allocated_string (e->module);
4731 mio_expr (&e->expr);
4740 /* Write derived type extensions to the module. */
4743 write_dt_extensions (gfc_symtree *st)
4745 if (!gfc_check_access (st->n.sym->attr.access,
4746 st->n.sym->ns->default_access))
4750 mio_pool_string (&st->n.sym->name);
4751 if (st->n.sym->module != NULL)
4752 mio_pool_string (&st->n.sym->module);
4754 mio_internal_string (module_name);
4759 write_derived_extensions (gfc_symtree *st)
4761 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4762 && (st->n.sym->f2k_derived != NULL)
4763 && (st->n.sym->f2k_derived->sym_root != NULL)))
4767 mio_symbol_ref (&(st->n.sym));
4768 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4769 write_dt_extensions);
4774 /* Write a symbol to the module. */
4777 write_symbol (int n, gfc_symbol *sym)
4781 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4782 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4785 mio_pool_string (&sym->name);
4787 mio_pool_string (&sym->module);
4788 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4790 label = sym->binding_label;
4791 mio_pool_string (&label);
4794 mio_pool_string (&sym->name);
4796 mio_pointer_ref (&sym->ns);
4803 /* Recursive traversal function to write the initial set of symbols to
4804 the module. We check to see if the symbol should be written
4805 according to the access specification. */
4808 write_symbol0 (gfc_symtree *st)
4812 bool dont_write = false;
4817 write_symbol0 (st->left);
4820 if (sym->module == NULL)
4821 sym->module = gfc_get_string (module_name);
4823 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4824 && !sym->attr.subroutine && !sym->attr.function)
4827 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4832 p = get_pointer (sym);
4833 if (p->type == P_UNKNOWN)
4836 if (p->u.wsym.state != WRITTEN)
4838 write_symbol (p->integer, sym);
4839 p->u.wsym.state = WRITTEN;
4843 write_symbol0 (st->right);
4847 /* Recursive traversal function to write the secondary set of symbols
4848 to the module file. These are symbols that were not public yet are
4849 needed by the public symbols or another dependent symbol. The act
4850 of writing a symbol can modify the pointer_info tree, so we cease
4851 traversal if we find a symbol to write. We return nonzero if a
4852 symbol was written and pass that information upwards. */
4855 write_symbol1 (pointer_info *p)
4862 result = write_symbol1 (p->left);
4864 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4866 p->u.wsym.state = WRITTEN;
4867 write_symbol (p->integer, p->u.wsym.sym);
4871 result |= write_symbol1 (p->right);
4876 /* Write operator interfaces associated with a symbol. */
4879 write_operator (gfc_user_op *uop)
4881 static char nullstring[] = "";
4882 const char *p = nullstring;
4885 || !gfc_check_access (uop->access, uop->ns->default_access))
4888 mio_symbol_interface (&uop->name, &p, &uop->op);
4892 /* Write generic interfaces from the namespace sym_root. */
4895 write_generic (gfc_symtree *st)
4902 write_generic (st->left);
4903 write_generic (st->right);
4906 if (!sym || check_unique_name (st->name))
4909 if (sym->generic == NULL
4910 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4913 if (sym->module == NULL)
4914 sym->module = gfc_get_string (module_name);
4916 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4921 write_symtree (gfc_symtree *st)
4928 /* A symbol in an interface body must not be visible in the
4930 if (sym->ns != gfc_current_ns
4931 && sym->ns->proc_name
4932 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4935 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4936 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4937 && !sym->attr.subroutine && !sym->attr.function))
4940 if (check_unique_name (st->name))
4943 p = find_pointer (sym);
4945 gfc_internal_error ("write_symtree(): Symbol not written");
4947 mio_pool_string (&st->name);
4948 mio_integer (&st->ambiguous);
4949 mio_integer (&p->integer);
4958 /* Write the operator interfaces. */
4961 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4963 if (i == INTRINSIC_USER)
4966 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4967 gfc_current_ns->default_access)
4968 ? &gfc_current_ns->op[i] : NULL);
4976 gfc_traverse_user_op (gfc_current_ns, write_operator);
4982 write_generic (gfc_current_ns->sym_root);
4988 write_blank_common ();
4989 write_common (gfc_current_ns->common_root);
5001 gfc_traverse_symtree (gfc_current_ns->sym_root,
5002 write_derived_extensions);
5007 /* Write symbol information. First we traverse all symbols in the
5008 primary namespace, writing those that need to be written.
5009 Sometimes writing one symbol will cause another to need to be
5010 written. A list of these symbols ends up on the write stack, and
5011 we end by popping the bottom of the stack and writing the symbol
5012 until the stack is empty. */
5016 write_symbol0 (gfc_current_ns->sym_root);
5017 while (write_symbol1 (pi_root))
5026 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
5031 /* Read a MD5 sum from the header of a module file. If the file cannot
5032 be opened, or we have any other error, we return -1. */
5035 read_md5_from_module_file (const char * filename, unsigned char md5[16])
5041 /* Open the file. */
5042 if ((file = fopen (filename, "r")) == NULL)
5045 /* Read the first line. */
5046 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5052 /* The file also needs to be overwritten if the version number changed. */
5053 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
5054 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
5060 /* Read a second line. */
5061 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5067 /* Close the file. */
5070 /* If the header is not what we expect, or is too short, bail out. */
5071 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5074 /* Now, we have a real MD5, read it into the array. */
5075 for (n = 0; n < 16; n++)
5079 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5089 /* Given module, dump it to disk. If there was an error while
5090 processing the module, dump_flag will be set to zero and we delete
5091 the module file, even if it was already there. */
5094 gfc_dump_module (const char *name, int dump_flag)
5097 char *filename, *filename_tmp, *p;
5100 unsigned char md5_new[16], md5_old[16];
5102 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5103 if (gfc_option.module_dir != NULL)
5105 n += strlen (gfc_option.module_dir);
5106 filename = (char *) alloca (n);
5107 strcpy (filename, gfc_option.module_dir);
5108 strcat (filename, name);
5112 filename = (char *) alloca (n);
5113 strcpy (filename, name);
5115 strcat (filename, MODULE_EXTENSION);
5117 /* Name of the temporary file used to write the module. */
5118 filename_tmp = (char *) alloca (n + 1);
5119 strcpy (filename_tmp, filename);
5120 strcat (filename_tmp, "0");
5122 /* There was an error while processing the module. We delete the
5123 module file, even if it was already there. */
5130 if (gfc_cpp_makedep ())
5131 gfc_cpp_add_target (filename);
5133 /* Write the module to the temporary file. */
5134 module_fp = fopen (filename_tmp, "w");
5135 if (module_fp == NULL)
5136 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5137 filename_tmp, xstrerror (errno));
5139 /* Write the header, including space reserved for the MD5 sum. */
5143 *strchr (p, '\n') = '\0';
5145 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5146 "MD5:", MOD_VERSION, gfc_source_file, p);
5147 fgetpos (module_fp, &md5_pos);
5148 fputs ("00000000000000000000000000000000 -- "
5149 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5151 /* Initialize the MD5 context that will be used for output. */
5152 md5_init_ctx (&ctx);
5154 /* Write the module itself. */
5156 strcpy (module_name, name);
5162 free_pi_tree (pi_root);
5167 /* Write the MD5 sum to the header of the module file. */
5168 md5_finish_ctx (&ctx, md5_new);
5169 fsetpos (module_fp, &md5_pos);
5170 for (n = 0; n < 16; n++)
5171 fprintf (module_fp, "%02x", md5_new[n]);
5173 if (fclose (module_fp))
5174 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5175 filename_tmp, xstrerror (errno));
5177 /* Read the MD5 from the header of the old module file and compare. */
5178 if (read_md5_from_module_file (filename, md5_old) != 0
5179 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5181 /* Module file have changed, replace the old one. */
5182 if (unlink (filename) && errno != ENOENT)
5183 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5185 if (rename (filename_tmp, filename))
5186 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5187 filename_tmp, filename, xstrerror (errno));
5191 if (unlink (filename_tmp))
5192 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5193 filename_tmp, xstrerror (errno));
5199 sort_iso_c_rename_list (void)
5201 gfc_use_rename *tmp_list = NULL;
5202 gfc_use_rename *curr;
5203 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
5207 for (curr = gfc_rename_list; curr; curr = curr->next)
5209 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
5210 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
5212 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5213 "intrinsic module ISO_C_BINDING.", curr->use_name,
5217 /* Put it in the list. */
5218 kinds_used[c_kind] = curr;
5221 /* Make a new (sorted) rename list. */
5223 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
5226 if (i < ISOCBINDING_NUMBER)
5228 tmp_list = kinds_used[i];
5232 for (; i < ISOCBINDING_NUMBER; i++)
5233 if (kinds_used[i] != NULL)
5235 curr->next = kinds_used[i];
5241 gfc_rename_list = tmp_list;
5245 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5246 the current namespace for all named constants, pointer types, and
5247 procedures in the module unless the only clause was used or a rename
5248 list was provided. */
5251 import_iso_c_binding_module (void)
5253 gfc_symbol *mod_sym = NULL;
5254 gfc_symtree *mod_symtree = NULL;
5255 const char *iso_c_module_name = "__iso_c_binding";
5260 /* Look only in the current namespace. */
5261 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5263 if (mod_symtree == NULL)
5265 /* symtree doesn't already exist in current namespace. */
5266 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5269 if (mod_symtree != NULL)
5270 mod_sym = mod_symtree->n.sym;
5272 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5273 "create symbol for %s", iso_c_module_name);
5275 mod_sym->attr.flavor = FL_MODULE;
5276 mod_sym->attr.intrinsic = 1;
5277 mod_sym->module = gfc_get_string (iso_c_module_name);
5278 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5281 /* Generate the symbols for the named constants representing
5282 the kinds for intrinsic data types. */
5285 /* Sort the rename list because there are dependencies between types
5286 and procedures (e.g., c_loc needs c_ptr). */
5287 sort_iso_c_rename_list ();
5289 for (u = gfc_rename_list; u; u = u->next)
5291 i = get_c_kind (u->use_name, c_interop_kinds_table);
5293 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
5295 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5296 "intrinsic module ISO_C_BINDING.", u->use_name,
5301 generate_isocbinding_symbol (iso_c_module_name,
5302 (iso_c_binding_symbol) i,
5308 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5311 for (u = gfc_rename_list; u; u = u->next)
5313 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5315 local_name = u->local_name;
5320 generate_isocbinding_symbol (iso_c_module_name,
5321 (iso_c_binding_symbol) i,
5325 for (u = gfc_rename_list; u; u = u->next)
5330 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5331 "module ISO_C_BINDING", u->use_name, &u->where);
5337 /* Add an integer named constant from a given module. */
5340 create_int_parameter (const char *name, int value, const char *modname,
5341 intmod_id module, int id)
5343 gfc_symtree *tmp_symtree;
5346 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5347 if (tmp_symtree != NULL)
5349 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5352 gfc_error ("Symbol '%s' already declared", name);
5355 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5356 sym = tmp_symtree->n.sym;
5358 sym->module = gfc_get_string (modname);
5359 sym->attr.flavor = FL_PARAMETER;
5360 sym->ts.type = BT_INTEGER;
5361 sym->ts.kind = gfc_default_integer_kind;
5362 sym->value = gfc_get_int_expr (gfc_default_integer_kind, NULL, value);
5363 sym->attr.use_assoc = 1;
5364 sym->from_intmod = module;
5365 sym->intmod_sym_id = id;
5369 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5372 use_iso_fortran_env_module (void)
5374 static char mod[] = "iso_fortran_env";
5375 const char *local_name;
5377 gfc_symbol *mod_sym;
5378 gfc_symtree *mod_symtree;
5381 intmod_sym symbol[] = {
5382 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5383 #include "iso-fortran-env.def"
5385 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5388 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5389 #include "iso-fortran-env.def"
5392 /* Generate the symbol for the module itself. */
5393 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5394 if (mod_symtree == NULL)
5396 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5397 gcc_assert (mod_symtree);
5398 mod_sym = mod_symtree->n.sym;
5400 mod_sym->attr.flavor = FL_MODULE;
5401 mod_sym->attr.intrinsic = 1;
5402 mod_sym->module = gfc_get_string (mod);
5403 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5406 if (!mod_symtree->n.sym->attr.intrinsic)
5407 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5408 "non-intrinsic module name used previously", mod);
5410 /* Generate the symbols for the module integer named constants. */
5412 for (u = gfc_rename_list; u; u = u->next)
5414 for (i = 0; symbol[i].name; i++)
5415 if (strcmp (symbol[i].name, u->use_name) == 0)
5418 if (symbol[i].name == NULL)
5420 gfc_error ("Symbol '%s' referenced at %L does not exist in "
5421 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
5426 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5427 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5428 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5429 "from intrinsic module ISO_FORTRAN_ENV at %L is "
5430 "incompatible with option %s", &u->where,
5431 gfc_option.flag_default_integer
5432 ? "-fdefault-integer-8" : "-fdefault-real-8");
5434 if (gfc_notify_std (symbol[i].standard, "The symbol '%s', referrenced "
5435 "at %C, is not in the selected standard",
5436 symbol[i].name) == FAILURE)
5439 create_int_parameter (u->local_name[0] ? u->local_name
5441 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5446 for (i = 0; symbol[i].name; i++)
5450 for (u = gfc_rename_list; u; u = u->next)
5452 if (strcmp (symbol[i].name, u->use_name) == 0)
5454 local_name = u->local_name;
5460 if (u && gfc_notify_std (symbol[i].standard, "The symbol '%s', "
5461 "referrenced at %C, is not in the selected "
5462 "standard", symbol[i].name) == FAILURE)
5464 else if ((gfc_option.allow_std & symbol[i].standard) == 0)
5467 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5468 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5469 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5470 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5471 "incompatible with option %s",
5472 gfc_option.flag_default_integer
5473 ? "-fdefault-integer-8" : "-fdefault-real-8");
5475 create_int_parameter (local_name ? local_name : symbol[i].name,
5476 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
5480 for (u = gfc_rename_list; u; u = u->next)
5485 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5486 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5492 /* Process a USE directive. */
5495 gfc_use_module (void)
5500 gfc_symtree *mod_symtree;
5501 gfc_use_list *use_stmt;
5503 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5505 strcpy (filename, module_name);
5506 strcat (filename, MODULE_EXTENSION);
5508 /* First, try to find an non-intrinsic module, unless the USE statement
5509 specified that the module is intrinsic. */
5512 module_fp = gfc_open_included_file (filename, true, true);
5514 /* Then, see if it's an intrinsic one, unless the USE statement
5515 specified that the module is non-intrinsic. */
5516 if (module_fp == NULL && !specified_nonint)
5518 if (strcmp (module_name, "iso_fortran_env") == 0
5519 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5520 "intrinsic module at %C") != FAILURE)
5522 use_iso_fortran_env_module ();
5526 if (strcmp (module_name, "iso_c_binding") == 0
5527 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5528 "ISO_C_BINDING module at %C") != FAILURE)
5530 import_iso_c_binding_module();
5534 module_fp = gfc_open_intrinsic_module (filename);
5536 if (module_fp == NULL && specified_int)
5537 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5541 if (module_fp == NULL)
5542 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5543 filename, xstrerror (errno));
5545 /* Check that we haven't already USEd an intrinsic module with the
5548 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5549 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5550 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5551 "intrinsic module name used previously", module_name);
5558 /* Skip the first two lines of the module, after checking that this is
5559 a gfortran module file. */
5565 bad_module ("Unexpected end of module");
5568 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5569 || (start == 2 && strcmp (atom_name, " module") != 0))
5570 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5574 if (strcmp (atom_name, " version") != 0
5575 || module_char () != ' '
5576 || parse_atom () != ATOM_STRING)
5577 gfc_fatal_error ("Parse error when checking module version"
5578 " for file '%s' opened at %C", filename);
5580 if (strcmp (atom_string, MOD_VERSION))
5582 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5583 "for file '%s' opened at %C", atom_string,
5584 MOD_VERSION, filename);
5592 /* Make sure we're not reading the same module that we may be building. */
5593 for (p = gfc_state_stack; p; p = p->previous)
5594 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5595 gfc_fatal_error ("Can't USE the same module we're building!");
5598 init_true_name_tree ();
5602 free_true_name (true_name_root);
5603 true_name_root = NULL;
5605 free_pi_tree (pi_root);
5610 use_stmt = gfc_get_use_list ();
5611 use_stmt->module_name = gfc_get_string (module_name);
5612 use_stmt->only_flag = only_flag;
5613 use_stmt->rename = gfc_rename_list;
5614 use_stmt->where = use_locus;
5615 gfc_rename_list = NULL;
5616 use_stmt->next = gfc_current_ns->use_stmts;
5617 gfc_current_ns->use_stmts = use_stmt;
5622 gfc_free_use_stmts (gfc_use_list *use_stmts)
5625 for (; use_stmts; use_stmts = next)
5627 gfc_use_rename *next_rename;
5629 for (; use_stmts->rename; use_stmts->rename = next_rename)
5631 next_rename = use_stmts->rename->next;
5632 gfc_free (use_stmts->rename);
5634 next = use_stmts->next;
5635 gfc_free (use_stmts);
5641 gfc_module_init_2 (void)
5643 last_atom = ATOM_LPAREN;
5648 gfc_module_done_2 (void)