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 "6"
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,
1675 AB_ALLOC_COMP, AB_POINTER_COMP, AB_PROC_POINTER_COMP, AB_PRIVATE_COMP,
1676 AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1677 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1678 AB_IS_CLASS, AB_PROCEDURE, AB_PROC_POINTER, AB_ASYNCHRONOUS, AB_CODIMENSION,
1679 AB_COARRAY_COMP, AB_VTYPE, AB_VTAB, AB_CONTIGUOUS, AB_CLASS_POINTER,
1684 static const mstring attr_bits[] =
1686 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1687 minit ("ASYNCHRONOUS", AB_ASYNCHRONOUS),
1688 minit ("DIMENSION", AB_DIMENSION),
1689 minit ("CODIMENSION", AB_CODIMENSION),
1690 minit ("CONTIGUOUS", AB_CONTIGUOUS),
1691 minit ("EXTERNAL", AB_EXTERNAL),
1692 minit ("INTRINSIC", AB_INTRINSIC),
1693 minit ("OPTIONAL", AB_OPTIONAL),
1694 minit ("POINTER", AB_POINTER),
1695 minit ("VOLATILE", AB_VOLATILE),
1696 minit ("TARGET", AB_TARGET),
1697 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1698 minit ("DUMMY", AB_DUMMY),
1699 minit ("RESULT", AB_RESULT),
1700 minit ("DATA", AB_DATA),
1701 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1702 minit ("IN_COMMON", AB_IN_COMMON),
1703 minit ("FUNCTION", AB_FUNCTION),
1704 minit ("SUBROUTINE", AB_SUBROUTINE),
1705 minit ("SEQUENCE", AB_SEQUENCE),
1706 minit ("ELEMENTAL", AB_ELEMENTAL),
1707 minit ("PURE", AB_PURE),
1708 minit ("RECURSIVE", AB_RECURSIVE),
1709 minit ("GENERIC", AB_GENERIC),
1710 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1711 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1712 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1713 minit ("IS_BIND_C", AB_IS_BIND_C),
1714 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1715 minit ("IS_ISO_C", AB_IS_ISO_C),
1716 minit ("VALUE", AB_VALUE),
1717 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1718 minit ("COARRAY_COMP", AB_COARRAY_COMP),
1719 minit ("POINTER_COMP", AB_POINTER_COMP),
1720 minit ("PROC_POINTER_COMP", AB_PROC_POINTER_COMP),
1721 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1722 minit ("ZERO_COMP", AB_ZERO_COMP),
1723 minit ("PROTECTED", AB_PROTECTED),
1724 minit ("ABSTRACT", AB_ABSTRACT),
1725 minit ("IS_CLASS", AB_IS_CLASS),
1726 minit ("PROCEDURE", AB_PROCEDURE),
1727 minit ("PROC_POINTER", AB_PROC_POINTER),
1728 minit ("VTYPE", AB_VTYPE),
1729 minit ("VTAB", AB_VTAB),
1730 minit ("CLASS_POINTER", AB_CLASS_POINTER),
1731 minit ("IMPLICIT_PURE", AB_IMPLICIT_PURE),
1735 /* For binding attributes. */
1736 static const mstring binding_passing[] =
1739 minit ("NOPASS", 1),
1742 static const mstring binding_overriding[] =
1744 minit ("OVERRIDABLE", 0),
1745 minit ("NON_OVERRIDABLE", 1),
1746 minit ("DEFERRED", 2),
1749 static const mstring binding_generic[] =
1751 minit ("SPECIFIC", 0),
1752 minit ("GENERIC", 1),
1755 static const mstring binding_ppc[] =
1757 minit ("NO_PPC", 0),
1762 /* Specialization of mio_name. */
1763 DECL_MIO_NAME (ab_attribute)
1764 DECL_MIO_NAME (ar_type)
1765 DECL_MIO_NAME (array_type)
1767 DECL_MIO_NAME (expr_t)
1768 DECL_MIO_NAME (gfc_access)
1769 DECL_MIO_NAME (gfc_intrinsic_op)
1770 DECL_MIO_NAME (ifsrc)
1771 DECL_MIO_NAME (save_state)
1772 DECL_MIO_NAME (procedure_type)
1773 DECL_MIO_NAME (ref_type)
1774 DECL_MIO_NAME (sym_flavor)
1775 DECL_MIO_NAME (sym_intent)
1776 #undef DECL_MIO_NAME
1778 /* Symbol attributes are stored in list with the first three elements
1779 being the enumerated fields, while the remaining elements (if any)
1780 indicate the individual attribute bits. The access field is not
1781 saved-- it controls what symbols are exported when a module is
1785 mio_symbol_attribute (symbol_attribute *attr)
1788 unsigned ext_attr,extension_level;
1792 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1793 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1794 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1795 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1796 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1798 ext_attr = attr->ext_attr;
1799 mio_integer ((int *) &ext_attr);
1800 attr->ext_attr = ext_attr;
1802 extension_level = attr->extension;
1803 mio_integer ((int *) &extension_level);
1804 attr->extension = extension_level;
1806 if (iomode == IO_OUTPUT)
1808 if (attr->allocatable)
1809 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1810 if (attr->asynchronous)
1811 MIO_NAME (ab_attribute) (AB_ASYNCHRONOUS, attr_bits);
1812 if (attr->dimension)
1813 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1814 if (attr->codimension)
1815 MIO_NAME (ab_attribute) (AB_CODIMENSION, attr_bits);
1816 if (attr->contiguous)
1817 MIO_NAME (ab_attribute) (AB_CONTIGUOUS, attr_bits);
1819 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1820 if (attr->intrinsic)
1821 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1823 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1825 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1826 if (attr->class_pointer)
1827 MIO_NAME (ab_attribute) (AB_CLASS_POINTER, attr_bits);
1828 if (attr->is_protected)
1829 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1831 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1832 if (attr->volatile_)
1833 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1835 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1836 if (attr->threadprivate)
1837 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1839 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1841 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1842 /* We deliberately don't preserve the "entry" flag. */
1845 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1846 if (attr->in_namelist)
1847 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1848 if (attr->in_common)
1849 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1852 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1853 if (attr->subroutine)
1854 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1856 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1858 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1861 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1862 if (attr->elemental)
1863 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1865 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1866 if (attr->implicit_pure)
1867 MIO_NAME (ab_attribute) (AB_IMPLICIT_PURE, attr_bits);
1868 if (attr->recursive)
1869 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1870 if (attr->always_explicit)
1871 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1872 if (attr->cray_pointer)
1873 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1874 if (attr->cray_pointee)
1875 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1876 if (attr->is_bind_c)
1877 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1878 if (attr->is_c_interop)
1879 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1881 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1882 if (attr->alloc_comp)
1883 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1884 if (attr->pointer_comp)
1885 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1886 if (attr->proc_pointer_comp)
1887 MIO_NAME (ab_attribute) (AB_PROC_POINTER_COMP, attr_bits);
1888 if (attr->private_comp)
1889 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1890 if (attr->coarray_comp)
1891 MIO_NAME (ab_attribute) (AB_COARRAY_COMP, attr_bits);
1892 if (attr->zero_comp)
1893 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1895 MIO_NAME (ab_attribute) (AB_IS_CLASS, attr_bits);
1896 if (attr->procedure)
1897 MIO_NAME (ab_attribute) (AB_PROCEDURE, attr_bits);
1898 if (attr->proc_pointer)
1899 MIO_NAME (ab_attribute) (AB_PROC_POINTER, attr_bits);
1901 MIO_NAME (ab_attribute) (AB_VTYPE, attr_bits);
1903 MIO_NAME (ab_attribute) (AB_VTAB, attr_bits);
1913 if (t == ATOM_RPAREN)
1916 bad_module ("Expected attribute bit name");
1918 switch ((ab_attribute) find_enum (attr_bits))
1920 case AB_ALLOCATABLE:
1921 attr->allocatable = 1;
1923 case AB_ASYNCHRONOUS:
1924 attr->asynchronous = 1;
1927 attr->dimension = 1;
1929 case AB_CODIMENSION:
1930 attr->codimension = 1;
1933 attr->contiguous = 1;
1939 attr->intrinsic = 1;
1947 case AB_CLASS_POINTER:
1948 attr->class_pointer = 1;
1951 attr->is_protected = 1;
1957 attr->volatile_ = 1;
1962 case AB_THREADPRIVATE:
1963 attr->threadprivate = 1;
1974 case AB_IN_NAMELIST:
1975 attr->in_namelist = 1;
1978 attr->in_common = 1;
1984 attr->subroutine = 1;
1996 attr->elemental = 1;
2001 case AB_IMPLICIT_PURE:
2002 attr->implicit_pure = 1;
2005 attr->recursive = 1;
2007 case AB_ALWAYS_EXPLICIT:
2008 attr->always_explicit = 1;
2010 case AB_CRAY_POINTER:
2011 attr->cray_pointer = 1;
2013 case AB_CRAY_POINTEE:
2014 attr->cray_pointee = 1;
2017 attr->is_bind_c = 1;
2019 case AB_IS_C_INTEROP:
2020 attr->is_c_interop = 1;
2026 attr->alloc_comp = 1;
2028 case AB_COARRAY_COMP:
2029 attr->coarray_comp = 1;
2031 case AB_POINTER_COMP:
2032 attr->pointer_comp = 1;
2034 case AB_PROC_POINTER_COMP:
2035 attr->proc_pointer_comp = 1;
2037 case AB_PRIVATE_COMP:
2038 attr->private_comp = 1;
2041 attr->zero_comp = 1;
2047 attr->procedure = 1;
2049 case AB_PROC_POINTER:
2050 attr->proc_pointer = 1;
2064 static const mstring bt_types[] = {
2065 minit ("INTEGER", BT_INTEGER),
2066 minit ("REAL", BT_REAL),
2067 minit ("COMPLEX", BT_COMPLEX),
2068 minit ("LOGICAL", BT_LOGICAL),
2069 minit ("CHARACTER", BT_CHARACTER),
2070 minit ("DERIVED", BT_DERIVED),
2071 minit ("CLASS", BT_CLASS),
2072 minit ("PROCEDURE", BT_PROCEDURE),
2073 minit ("UNKNOWN", BT_UNKNOWN),
2074 minit ("VOID", BT_VOID),
2080 mio_charlen (gfc_charlen **clp)
2086 if (iomode == IO_OUTPUT)
2090 mio_expr (&cl->length);
2094 if (peek_atom () != ATOM_RPAREN)
2096 cl = gfc_new_charlen (gfc_current_ns, NULL);
2097 mio_expr (&cl->length);
2106 /* See if a name is a generated name. */
2109 check_unique_name (const char *name)
2111 return *name == '@';
2116 mio_typespec (gfc_typespec *ts)
2120 ts->type = MIO_NAME (bt) (ts->type, bt_types);
2122 if (ts->type != BT_DERIVED && ts->type != BT_CLASS)
2123 mio_integer (&ts->kind);
2125 mio_symbol_ref (&ts->u.derived);
2127 /* Add info for C interop and is_iso_c. */
2128 mio_integer (&ts->is_c_interop);
2129 mio_integer (&ts->is_iso_c);
2131 /* If the typespec is for an identifier either from iso_c_binding, or
2132 a constant that was initialized to an identifier from it, use the
2133 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2135 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2137 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2139 if (ts->type != BT_CHARACTER)
2141 /* ts->u.cl is only valid for BT_CHARACTER. */
2146 mio_charlen (&ts->u.cl);
2148 /* So as not to disturb the existing API, use an ATOM_NAME to
2149 transmit deferred characteristic for characters (F2003). */
2150 if (iomode == IO_OUTPUT)
2152 if (ts->type == BT_CHARACTER && ts->deferred)
2153 write_atom (ATOM_NAME, "DEFERRED_CL");
2155 else if (peek_atom () != ATOM_RPAREN)
2157 if (parse_atom () != ATOM_NAME)
2158 bad_module ("Expected string");
2166 static const mstring array_spec_types[] = {
2167 minit ("EXPLICIT", AS_EXPLICIT),
2168 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2169 minit ("DEFERRED", AS_DEFERRED),
2170 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2176 mio_array_spec (gfc_array_spec **asp)
2183 if (iomode == IO_OUTPUT)
2191 if (peek_atom () == ATOM_RPAREN)
2197 *asp = as = gfc_get_array_spec ();
2200 mio_integer (&as->rank);
2201 mio_integer (&as->corank);
2202 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2204 for (i = 0; i < as->rank + as->corank; i++)
2206 mio_expr (&as->lower[i]);
2207 mio_expr (&as->upper[i]);
2215 /* Given a pointer to an array reference structure (which lives in a
2216 gfc_ref structure), find the corresponding array specification
2217 structure. Storing the pointer in the ref structure doesn't quite
2218 work when loading from a module. Generating code for an array
2219 reference also needs more information than just the array spec. */
2221 static const mstring array_ref_types[] = {
2222 minit ("FULL", AR_FULL),
2223 minit ("ELEMENT", AR_ELEMENT),
2224 minit ("SECTION", AR_SECTION),
2230 mio_array_ref (gfc_array_ref *ar)
2235 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2236 mio_integer (&ar->dimen);
2244 for (i = 0; i < ar->dimen; i++)
2245 mio_expr (&ar->start[i]);
2250 for (i = 0; i < ar->dimen; i++)
2252 mio_expr (&ar->start[i]);
2253 mio_expr (&ar->end[i]);
2254 mio_expr (&ar->stride[i]);
2260 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2263 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2264 we can't call mio_integer directly. Instead loop over each element
2265 and cast it to/from an integer. */
2266 if (iomode == IO_OUTPUT)
2268 for (i = 0; i < ar->dimen; i++)
2270 int tmp = (int)ar->dimen_type[i];
2271 write_atom (ATOM_INTEGER, &tmp);
2276 for (i = 0; i < ar->dimen; i++)
2278 require_atom (ATOM_INTEGER);
2279 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2283 if (iomode == IO_INPUT)
2285 ar->where = gfc_current_locus;
2287 for (i = 0; i < ar->dimen; i++)
2288 ar->c_where[i] = gfc_current_locus;
2295 /* Saves or restores a pointer. The pointer is converted back and
2296 forth from an integer. We return the pointer_info pointer so that
2297 the caller can take additional action based on the pointer type. */
2299 static pointer_info *
2300 mio_pointer_ref (void *gp)
2304 if (iomode == IO_OUTPUT)
2306 p = get_pointer (*((char **) gp));
2307 write_atom (ATOM_INTEGER, &p->integer);
2311 require_atom (ATOM_INTEGER);
2312 p = add_fixup (atom_int, gp);
2319 /* Save and load references to components that occur within
2320 expressions. We have to describe these references by a number and
2321 by name. The number is necessary for forward references during
2322 reading, and the name is necessary if the symbol already exists in
2323 the namespace and is not loaded again. */
2326 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2328 char name[GFC_MAX_SYMBOL_LEN + 1];
2332 p = mio_pointer_ref (cp);
2333 if (p->type == P_UNKNOWN)
2334 p->type = P_COMPONENT;
2336 if (iomode == IO_OUTPUT)
2337 mio_pool_string (&(*cp)->name);
2340 mio_internal_string (name);
2342 if (sym && sym->attr.is_class)
2343 sym = sym->components->ts.u.derived;
2345 /* It can happen that a component reference can be read before the
2346 associated derived type symbol has been loaded. Return now and
2347 wait for a later iteration of load_needed. */
2351 if (sym->components != NULL && p->u.pointer == NULL)
2353 /* Symbol already loaded, so search by name. */
2354 for (q = sym->components; q; q = q->next)
2355 if (strcmp (q->name, name) == 0)
2359 gfc_internal_error ("mio_component_ref(): Component not found");
2361 associate_integer_pointer (p, q);
2364 /* Make sure this symbol will eventually be loaded. */
2365 p = find_pointer2 (sym);
2366 if (p->u.rsym.state == UNUSED)
2367 p->u.rsym.state = NEEDED;
2372 static void mio_namespace_ref (gfc_namespace **nsp);
2373 static void mio_formal_arglist (gfc_formal_arglist **formal);
2374 static void mio_typebound_proc (gfc_typebound_proc** proc);
2377 mio_component (gfc_component *c, int vtype)
2381 gfc_formal_arglist *formal;
2385 if (iomode == IO_OUTPUT)
2387 p = get_pointer (c);
2388 mio_integer (&p->integer);
2393 p = get_integer (n);
2394 associate_integer_pointer (p, c);
2397 if (p->type == P_UNKNOWN)
2398 p->type = P_COMPONENT;
2400 mio_pool_string (&c->name);
2401 mio_typespec (&c->ts);
2402 mio_array_spec (&c->as);
2404 mio_symbol_attribute (&c->attr);
2405 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2408 mio_expr (&c->initializer);
2410 if (c->attr.proc_pointer)
2412 if (iomode == IO_OUTPUT)
2415 while (formal && !formal->sym)
2416 formal = formal->next;
2419 mio_namespace_ref (&formal->sym->ns);
2421 mio_namespace_ref (&c->formal_ns);
2425 mio_namespace_ref (&c->formal_ns);
2426 /* TODO: if (c->formal_ns)
2428 c->formal_ns->proc_name = c;
2433 mio_formal_arglist (&c->formal);
2435 mio_typebound_proc (&c->tb);
2443 mio_component_list (gfc_component **cp, int vtype)
2445 gfc_component *c, *tail;
2449 if (iomode == IO_OUTPUT)
2451 for (c = *cp; c; c = c->next)
2452 mio_component (c, vtype);
2461 if (peek_atom () == ATOM_RPAREN)
2464 c = gfc_get_component ();
2465 mio_component (c, vtype);
2481 mio_actual_arg (gfc_actual_arglist *a)
2484 mio_pool_string (&a->name);
2485 mio_expr (&a->expr);
2491 mio_actual_arglist (gfc_actual_arglist **ap)
2493 gfc_actual_arglist *a, *tail;
2497 if (iomode == IO_OUTPUT)
2499 for (a = *ap; a; a = a->next)
2509 if (peek_atom () != ATOM_LPAREN)
2512 a = gfc_get_actual_arglist ();
2528 /* Read and write formal argument lists. */
2531 mio_formal_arglist (gfc_formal_arglist **formal)
2533 gfc_formal_arglist *f, *tail;
2537 if (iomode == IO_OUTPUT)
2539 for (f = *formal; f; f = f->next)
2540 mio_symbol_ref (&f->sym);
2544 *formal = tail = NULL;
2546 while (peek_atom () != ATOM_RPAREN)
2548 f = gfc_get_formal_arglist ();
2549 mio_symbol_ref (&f->sym);
2551 if (*formal == NULL)
2564 /* Save or restore a reference to a symbol node. */
2567 mio_symbol_ref (gfc_symbol **symp)
2571 p = mio_pointer_ref (symp);
2572 if (p->type == P_UNKNOWN)
2575 if (iomode == IO_OUTPUT)
2577 if (p->u.wsym.state == UNREFERENCED)
2578 p->u.wsym.state = NEEDS_WRITE;
2582 if (p->u.rsym.state == UNUSED)
2583 p->u.rsym.state = NEEDED;
2589 /* Save or restore a reference to a symtree node. */
2592 mio_symtree_ref (gfc_symtree **stp)
2597 if (iomode == IO_OUTPUT)
2598 mio_symbol_ref (&(*stp)->n.sym);
2601 require_atom (ATOM_INTEGER);
2602 p = get_integer (atom_int);
2604 /* An unused equivalence member; make a symbol and a symtree
2606 if (in_load_equiv && p->u.rsym.symtree == NULL)
2608 /* Since this is not used, it must have a unique name. */
2609 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2611 /* Make the symbol. */
2612 if (p->u.rsym.sym == NULL)
2614 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2616 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2619 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2620 p->u.rsym.symtree->n.sym->refs++;
2621 p->u.rsym.referenced = 1;
2623 /* If the symbol is PRIVATE and in COMMON, load_commons will
2624 generate a fixup symbol, which must be associated. */
2626 resolve_fixups (p->fixup, p->u.rsym.sym);
2630 if (p->type == P_UNKNOWN)
2633 if (p->u.rsym.state == UNUSED)
2634 p->u.rsym.state = NEEDED;
2636 if (p->u.rsym.symtree != NULL)
2638 *stp = p->u.rsym.symtree;
2642 f = XCNEW (fixup_t);
2644 f->next = p->u.rsym.stfixup;
2645 p->u.rsym.stfixup = f;
2647 f->pointer = (void **) stp;
2654 mio_iterator (gfc_iterator **ip)
2660 if (iomode == IO_OUTPUT)
2667 if (peek_atom () == ATOM_RPAREN)
2673 *ip = gfc_get_iterator ();
2678 mio_expr (&iter->var);
2679 mio_expr (&iter->start);
2680 mio_expr (&iter->end);
2681 mio_expr (&iter->step);
2689 mio_constructor (gfc_constructor_base *cp)
2695 if (iomode == IO_OUTPUT)
2697 for (c = gfc_constructor_first (*cp); c; c = gfc_constructor_next (c))
2700 mio_expr (&c->expr);
2701 mio_iterator (&c->iterator);
2707 while (peek_atom () != ATOM_RPAREN)
2709 c = gfc_constructor_append_expr (cp, NULL, NULL);
2712 mio_expr (&c->expr);
2713 mio_iterator (&c->iterator);
2722 static const mstring ref_types[] = {
2723 minit ("ARRAY", REF_ARRAY),
2724 minit ("COMPONENT", REF_COMPONENT),
2725 minit ("SUBSTRING", REF_SUBSTRING),
2731 mio_ref (gfc_ref **rp)
2738 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2743 mio_array_ref (&r->u.ar);
2747 mio_symbol_ref (&r->u.c.sym);
2748 mio_component_ref (&r->u.c.component, r->u.c.sym);
2752 mio_expr (&r->u.ss.start);
2753 mio_expr (&r->u.ss.end);
2754 mio_charlen (&r->u.ss.length);
2763 mio_ref_list (gfc_ref **rp)
2765 gfc_ref *ref, *head, *tail;
2769 if (iomode == IO_OUTPUT)
2771 for (ref = *rp; ref; ref = ref->next)
2778 while (peek_atom () != ATOM_RPAREN)
2781 head = tail = gfc_get_ref ();
2784 tail->next = gfc_get_ref ();
2798 /* Read and write an integer value. */
2801 mio_gmp_integer (mpz_t *integer)
2805 if (iomode == IO_INPUT)
2807 if (parse_atom () != ATOM_STRING)
2808 bad_module ("Expected integer string");
2810 mpz_init (*integer);
2811 if (mpz_set_str (*integer, atom_string, 10))
2812 bad_module ("Error converting integer");
2814 gfc_free (atom_string);
2818 p = mpz_get_str (NULL, 10, *integer);
2819 write_atom (ATOM_STRING, p);
2826 mio_gmp_real (mpfr_t *real)
2831 if (iomode == IO_INPUT)
2833 if (parse_atom () != ATOM_STRING)
2834 bad_module ("Expected real string");
2837 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2838 gfc_free (atom_string);
2842 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2844 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2846 write_atom (ATOM_STRING, p);
2851 atom_string = XCNEWVEC (char, strlen (p) + 20);
2853 sprintf (atom_string, "0.%s@%ld", p, exponent);
2855 /* Fix negative numbers. */
2856 if (atom_string[2] == '-')
2858 atom_string[0] = '-';
2859 atom_string[1] = '0';
2860 atom_string[2] = '.';
2863 write_atom (ATOM_STRING, atom_string);
2865 gfc_free (atom_string);
2871 /* Save and restore the shape of an array constructor. */
2874 mio_shape (mpz_t **pshape, int rank)
2880 /* A NULL shape is represented by (). */
2883 if (iomode == IO_OUTPUT)
2895 if (t == ATOM_RPAREN)
2902 shape = gfc_get_shape (rank);
2906 for (n = 0; n < rank; n++)
2907 mio_gmp_integer (&shape[n]);
2913 static const mstring expr_types[] = {
2914 minit ("OP", EXPR_OP),
2915 minit ("FUNCTION", EXPR_FUNCTION),
2916 minit ("CONSTANT", EXPR_CONSTANT),
2917 minit ("VARIABLE", EXPR_VARIABLE),
2918 minit ("SUBSTRING", EXPR_SUBSTRING),
2919 minit ("STRUCTURE", EXPR_STRUCTURE),
2920 minit ("ARRAY", EXPR_ARRAY),
2921 minit ("NULL", EXPR_NULL),
2922 minit ("COMPCALL", EXPR_COMPCALL),
2926 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2927 generic operators, not in expressions. INTRINSIC_USER is also
2928 replaced by the correct function name by the time we see it. */
2930 static const mstring intrinsics[] =
2932 minit ("UPLUS", INTRINSIC_UPLUS),
2933 minit ("UMINUS", INTRINSIC_UMINUS),
2934 minit ("PLUS", INTRINSIC_PLUS),
2935 minit ("MINUS", INTRINSIC_MINUS),
2936 minit ("TIMES", INTRINSIC_TIMES),
2937 minit ("DIVIDE", INTRINSIC_DIVIDE),
2938 minit ("POWER", INTRINSIC_POWER),
2939 minit ("CONCAT", INTRINSIC_CONCAT),
2940 minit ("AND", INTRINSIC_AND),
2941 minit ("OR", INTRINSIC_OR),
2942 minit ("EQV", INTRINSIC_EQV),
2943 minit ("NEQV", INTRINSIC_NEQV),
2944 minit ("EQ_SIGN", INTRINSIC_EQ),
2945 minit ("EQ", INTRINSIC_EQ_OS),
2946 minit ("NE_SIGN", INTRINSIC_NE),
2947 minit ("NE", INTRINSIC_NE_OS),
2948 minit ("GT_SIGN", INTRINSIC_GT),
2949 minit ("GT", INTRINSIC_GT_OS),
2950 minit ("GE_SIGN", INTRINSIC_GE),
2951 minit ("GE", INTRINSIC_GE_OS),
2952 minit ("LT_SIGN", INTRINSIC_LT),
2953 minit ("LT", INTRINSIC_LT_OS),
2954 minit ("LE_SIGN", INTRINSIC_LE),
2955 minit ("LE", INTRINSIC_LE_OS),
2956 minit ("NOT", INTRINSIC_NOT),
2957 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2962 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2965 fix_mio_expr (gfc_expr *e)
2967 gfc_symtree *ns_st = NULL;
2970 if (iomode != IO_OUTPUT)
2975 /* If this is a symtree for a symbol that came from a contained module
2976 namespace, it has a unique name and we should look in the current
2977 namespace to see if the required, non-contained symbol is available
2978 yet. If so, the latter should be written. */
2979 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2980 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2981 e->symtree->n.sym->name);
2983 /* On the other hand, if the existing symbol is the module name or the
2984 new symbol is a dummy argument, do not do the promotion. */
2985 if (ns_st && ns_st->n.sym
2986 && ns_st->n.sym->attr.flavor != FL_MODULE
2987 && !e->symtree->n.sym->attr.dummy)
2990 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2994 /* In some circumstances, a function used in an initialization
2995 expression, in one use associated module, can fail to be
2996 coupled to its symtree when used in a specification
2997 expression in another module. */
2998 fname = e->value.function.esym ? e->value.function.esym->name
2999 : e->value.function.isym->name;
3000 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3005 /* This is probably a reference to a private procedure from another
3006 module. To prevent a segfault, make a generic with no specific
3007 instances. If this module is used, without the required
3008 specific coming from somewhere, the appropriate error message
3010 gfc_get_symbol (fname, gfc_current_ns, &sym);
3011 sym->attr.flavor = FL_PROCEDURE;
3012 sym->attr.generic = 1;
3013 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3018 /* Read and write expressions. The form "()" is allowed to indicate a
3022 mio_expr (gfc_expr **ep)
3030 if (iomode == IO_OUTPUT)
3039 MIO_NAME (expr_t) (e->expr_type, expr_types);
3044 if (t == ATOM_RPAREN)
3051 bad_module ("Expected expression type");
3053 e = *ep = gfc_get_expr ();
3054 e->where = gfc_current_locus;
3055 e->expr_type = (expr_t) find_enum (expr_types);
3058 mio_typespec (&e->ts);
3059 mio_integer (&e->rank);
3063 switch (e->expr_type)
3067 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
3069 switch (e->value.op.op)
3071 case INTRINSIC_UPLUS:
3072 case INTRINSIC_UMINUS:
3074 case INTRINSIC_PARENTHESES:
3075 mio_expr (&e->value.op.op1);
3078 case INTRINSIC_PLUS:
3079 case INTRINSIC_MINUS:
3080 case INTRINSIC_TIMES:
3081 case INTRINSIC_DIVIDE:
3082 case INTRINSIC_POWER:
3083 case INTRINSIC_CONCAT:
3087 case INTRINSIC_NEQV:
3089 case INTRINSIC_EQ_OS:
3091 case INTRINSIC_NE_OS:
3093 case INTRINSIC_GT_OS:
3095 case INTRINSIC_GE_OS:
3097 case INTRINSIC_LT_OS:
3099 case INTRINSIC_LE_OS:
3100 mio_expr (&e->value.op.op1);
3101 mio_expr (&e->value.op.op2);
3105 bad_module ("Bad operator");
3111 mio_symtree_ref (&e->symtree);
3112 mio_actual_arglist (&e->value.function.actual);
3114 if (iomode == IO_OUTPUT)
3116 e->value.function.name
3117 = mio_allocated_string (e->value.function.name);
3118 flag = e->value.function.esym != NULL;
3119 mio_integer (&flag);
3121 mio_symbol_ref (&e->value.function.esym);
3123 write_atom (ATOM_STRING, e->value.function.isym->name);
3127 require_atom (ATOM_STRING);
3128 e->value.function.name = gfc_get_string (atom_string);
3129 gfc_free (atom_string);
3131 mio_integer (&flag);
3133 mio_symbol_ref (&e->value.function.esym);
3136 require_atom (ATOM_STRING);
3137 e->value.function.isym = gfc_find_function (atom_string);
3138 gfc_free (atom_string);
3145 mio_symtree_ref (&e->symtree);
3146 mio_ref_list (&e->ref);
3149 case EXPR_SUBSTRING:
3150 e->value.character.string
3151 = CONST_CAST (gfc_char_t *,
3152 mio_allocated_wide_string (e->value.character.string,
3153 e->value.character.length));
3154 mio_ref_list (&e->ref);
3157 case EXPR_STRUCTURE:
3159 mio_constructor (&e->value.constructor);
3160 mio_shape (&e->shape, e->rank);
3167 mio_gmp_integer (&e->value.integer);
3171 gfc_set_model_kind (e->ts.kind);
3172 mio_gmp_real (&e->value.real);
3176 gfc_set_model_kind (e->ts.kind);
3177 mio_gmp_real (&mpc_realref (e->value.complex));
3178 mio_gmp_real (&mpc_imagref (e->value.complex));
3182 mio_integer (&e->value.logical);
3186 mio_integer (&e->value.character.length);
3187 e->value.character.string
3188 = CONST_CAST (gfc_char_t *,
3189 mio_allocated_wide_string (e->value.character.string,
3190 e->value.character.length));
3194 bad_module ("Bad type in constant expression");
3212 /* Read and write namelists. */
3215 mio_namelist (gfc_symbol *sym)
3217 gfc_namelist *n, *m;
3218 const char *check_name;
3222 if (iomode == IO_OUTPUT)
3224 for (n = sym->namelist; n; n = n->next)
3225 mio_symbol_ref (&n->sym);
3229 /* This departure from the standard is flagged as an error.
3230 It does, in fact, work correctly. TODO: Allow it
3232 if (sym->attr.flavor == FL_NAMELIST)
3234 check_name = find_use_name (sym->name, false);
3235 if (check_name && strcmp (check_name, sym->name) != 0)
3236 gfc_error ("Namelist %s cannot be renamed by USE "
3237 "association to %s", sym->name, check_name);
3241 while (peek_atom () != ATOM_RPAREN)
3243 n = gfc_get_namelist ();
3244 mio_symbol_ref (&n->sym);
3246 if (sym->namelist == NULL)
3253 sym->namelist_tail = m;
3260 /* Save/restore lists of gfc_interface structures. When loading an
3261 interface, we are really appending to the existing list of
3262 interfaces. Checking for duplicate and ambiguous interfaces has to
3263 be done later when all symbols have been loaded. */
3266 mio_interface_rest (gfc_interface **ip)
3268 gfc_interface *tail, *p;
3269 pointer_info *pi = NULL;
3271 if (iomode == IO_OUTPUT)
3274 for (p = *ip; p; p = p->next)
3275 mio_symbol_ref (&p->sym);
3290 if (peek_atom () == ATOM_RPAREN)
3293 p = gfc_get_interface ();
3294 p->where = gfc_current_locus;
3295 pi = mio_symbol_ref (&p->sym);
3311 /* Save/restore a nameless operator interface. */
3314 mio_interface (gfc_interface **ip)
3317 mio_interface_rest (ip);
3321 /* Save/restore a named operator interface. */
3324 mio_symbol_interface (const char **name, const char **module,
3328 mio_pool_string (name);
3329 mio_pool_string (module);
3330 mio_interface_rest (ip);
3335 mio_namespace_ref (gfc_namespace **nsp)
3340 p = mio_pointer_ref (nsp);
3342 if (p->type == P_UNKNOWN)
3343 p->type = P_NAMESPACE;
3345 if (iomode == IO_INPUT && p->integer != 0)
3347 ns = (gfc_namespace *) p->u.pointer;
3350 ns = gfc_get_namespace (NULL, 0);
3351 associate_integer_pointer (p, ns);
3359 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3361 static gfc_namespace* current_f2k_derived;
3364 mio_typebound_proc (gfc_typebound_proc** proc)
3367 int overriding_flag;
3369 if (iomode == IO_INPUT)
3371 *proc = gfc_get_typebound_proc (NULL);
3372 (*proc)->where = gfc_current_locus;
3378 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3380 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3381 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3382 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3383 overriding_flag = mio_name (overriding_flag, binding_overriding);
3384 (*proc)->deferred = ((overriding_flag & 2) != 0);
3385 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3386 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3388 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3389 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3390 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3392 mio_pool_string (&((*proc)->pass_arg));
3394 flag = (int) (*proc)->pass_arg_num;
3395 mio_integer (&flag);
3396 (*proc)->pass_arg_num = (unsigned) flag;
3398 if ((*proc)->is_generic)
3404 if (iomode == IO_OUTPUT)
3405 for (g = (*proc)->u.generic; g; g = g->next)
3406 mio_allocated_string (g->specific_st->name);
3409 (*proc)->u.generic = NULL;
3410 while (peek_atom () != ATOM_RPAREN)
3412 gfc_symtree** sym_root;
3414 g = gfc_get_tbp_generic ();
3417 require_atom (ATOM_STRING);
3418 sym_root = ¤t_f2k_derived->tb_sym_root;
3419 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3420 gfc_free (atom_string);
3422 g->next = (*proc)->u.generic;
3423 (*proc)->u.generic = g;
3429 else if (!(*proc)->ppc)
3430 mio_symtree_ref (&(*proc)->u.specific);
3435 /* Walker-callback function for this purpose. */
3437 mio_typebound_symtree (gfc_symtree* st)
3439 if (iomode == IO_OUTPUT && !st->n.tb)
3442 if (iomode == IO_OUTPUT)
3445 mio_allocated_string (st->name);
3447 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3449 mio_typebound_proc (&st->n.tb);
3453 /* IO a full symtree (in all depth). */
3455 mio_full_typebound_tree (gfc_symtree** root)
3459 if (iomode == IO_OUTPUT)
3460 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3463 while (peek_atom () == ATOM_LPAREN)
3469 require_atom (ATOM_STRING);
3470 st = gfc_get_tbp_symtree (root, atom_string);
3471 gfc_free (atom_string);
3473 mio_typebound_symtree (st);
3481 mio_finalizer (gfc_finalizer **f)
3483 if (iomode == IO_OUTPUT)
3486 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3487 mio_symtree_ref (&(*f)->proc_tree);
3491 *f = gfc_get_finalizer ();
3492 (*f)->where = gfc_current_locus; /* Value should not matter. */
3495 mio_symtree_ref (&(*f)->proc_tree);
3496 (*f)->proc_sym = NULL;
3501 mio_f2k_derived (gfc_namespace *f2k)
3503 current_f2k_derived = f2k;
3505 /* Handle the list of finalizer procedures. */
3507 if (iomode == IO_OUTPUT)
3510 for (f = f2k->finalizers; f; f = f->next)
3515 f2k->finalizers = NULL;
3516 while (peek_atom () != ATOM_RPAREN)
3518 gfc_finalizer *cur = NULL;
3519 mio_finalizer (&cur);
3520 cur->next = f2k->finalizers;
3521 f2k->finalizers = cur;
3526 /* Handle type-bound procedures. */
3527 mio_full_typebound_tree (&f2k->tb_sym_root);
3529 /* Type-bound user operators. */
3530 mio_full_typebound_tree (&f2k->tb_uop_root);
3532 /* Type-bound intrinsic operators. */
3534 if (iomode == IO_OUTPUT)
3537 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3539 gfc_intrinsic_op realop;
3541 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3545 realop = (gfc_intrinsic_op) op;
3546 mio_intrinsic_op (&realop);
3547 mio_typebound_proc (&f2k->tb_op[op]);
3552 while (peek_atom () != ATOM_RPAREN)
3554 gfc_intrinsic_op op = GFC_INTRINSIC_BEGIN; /* Silence GCC. */
3557 mio_intrinsic_op (&op);
3558 mio_typebound_proc (&f2k->tb_op[op]);
3565 mio_full_f2k_derived (gfc_symbol *sym)
3569 if (iomode == IO_OUTPUT)
3571 if (sym->f2k_derived)
3572 mio_f2k_derived (sym->f2k_derived);
3576 if (peek_atom () != ATOM_RPAREN)
3578 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3579 mio_f2k_derived (sym->f2k_derived);
3582 gcc_assert (!sym->f2k_derived);
3589 /* Unlike most other routines, the address of the symbol node is already
3590 fixed on input and the name/module has already been filled in. */
3593 mio_symbol (gfc_symbol *sym)
3595 int intmod = INTMOD_NONE;
3599 mio_symbol_attribute (&sym->attr);
3600 mio_typespec (&sym->ts);
3602 if (iomode == IO_OUTPUT)
3603 mio_namespace_ref (&sym->formal_ns);
3606 mio_namespace_ref (&sym->formal_ns);
3609 sym->formal_ns->proc_name = sym;
3614 /* Save/restore common block links. */
3615 mio_symbol_ref (&sym->common_next);
3617 mio_formal_arglist (&sym->formal);
3619 if (sym->attr.flavor == FL_PARAMETER)
3620 mio_expr (&sym->value);
3622 mio_array_spec (&sym->as);
3624 mio_symbol_ref (&sym->result);
3626 if (sym->attr.cray_pointee)
3627 mio_symbol_ref (&sym->cp_pointer);
3629 /* Note that components are always saved, even if they are supposed
3630 to be private. Component access is checked during searching. */
3632 mio_component_list (&sym->components, sym->attr.vtype);
3634 if (sym->components != NULL)
3635 sym->component_access
3636 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3638 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3639 mio_full_f2k_derived (sym);
3643 /* Add the fields that say whether this is from an intrinsic module,
3644 and if so, what symbol it is within the module. */
3645 /* mio_integer (&(sym->from_intmod)); */
3646 if (iomode == IO_OUTPUT)
3648 intmod = sym->from_intmod;
3649 mio_integer (&intmod);
3653 mio_integer (&intmod);
3654 sym->from_intmod = (intmod_id) intmod;
3657 mio_integer (&(sym->intmod_sym_id));
3659 if (sym->attr.flavor == FL_DERIVED)
3660 mio_integer (&(sym->hash_value));
3666 /************************* Top level subroutines *************************/
3668 /* Given a root symtree node and a symbol, try to find a symtree that
3669 references the symbol that is not a unique name. */
3671 static gfc_symtree *
3672 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3674 gfc_symtree *s = NULL;
3679 s = find_symtree_for_symbol (st->right, sym);
3682 s = find_symtree_for_symbol (st->left, sym);
3686 if (st->n.sym == sym && !check_unique_name (st->name))
3693 /* A recursive function to look for a specific symbol by name and by
3694 module. Whilst several symtrees might point to one symbol, its
3695 is sufficient for the purposes here than one exist. Note that
3696 generic interfaces are distinguished as are symbols that have been
3697 renamed in another module. */
3698 static gfc_symtree *
3699 find_symbol (gfc_symtree *st, const char *name,
3700 const char *module, int generic)
3703 gfc_symtree *retval, *s;
3705 if (st == NULL || st->n.sym == NULL)
3708 c = strcmp (name, st->n.sym->name);
3709 if (c == 0 && st->n.sym->module
3710 && strcmp (module, st->n.sym->module) == 0
3711 && !check_unique_name (st->name))
3713 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3715 /* Detect symbols that are renamed by use association in another
3716 module by the absence of a symtree and null attr.use_rename,
3717 since the latter is not transmitted in the module file. */
3718 if (((!generic && !st->n.sym->attr.generic)
3719 || (generic && st->n.sym->attr.generic))
3720 && !(s == NULL && !st->n.sym->attr.use_rename))
3724 retval = find_symbol (st->left, name, module, generic);
3727 retval = find_symbol (st->right, name, module, generic);
3733 /* Skip a list between balanced left and right parens. */
3743 switch (parse_atom ())
3754 gfc_free (atom_string);
3766 /* Load operator interfaces from the module. Interfaces are unusual
3767 in that they attach themselves to existing symbols. */
3770 load_operator_interfaces (void)
3773 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3775 pointer_info *pi = NULL;
3780 while (peek_atom () != ATOM_RPAREN)
3784 mio_internal_string (name);
3785 mio_internal_string (module);
3787 n = number_use_names (name, true);
3790 for (i = 1; i <= n; i++)
3792 /* Decide if we need to load this one or not. */
3793 p = find_use_name_n (name, &i, true);
3797 while (parse_atom () != ATOM_RPAREN);
3803 uop = gfc_get_uop (p);
3804 pi = mio_interface_rest (&uop->op);
3808 if (gfc_find_uop (p, NULL))
3810 uop = gfc_get_uop (p);
3811 uop->op = gfc_get_interface ();
3812 uop->op->where = gfc_current_locus;
3813 add_fixup (pi->integer, &uop->op->sym);
3822 /* Load interfaces from the module. Interfaces are unusual in that
3823 they attach themselves to existing symbols. */
3826 load_generic_interfaces (void)
3829 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3831 gfc_interface *generic = NULL, *gen = NULL;
3833 bool ambiguous_set = false;
3837 while (peek_atom () != ATOM_RPAREN)
3841 mio_internal_string (name);
3842 mio_internal_string (module);
3844 n = number_use_names (name, false);
3845 renamed = n ? 1 : 0;
3848 for (i = 1; i <= n; i++)
3851 /* Decide if we need to load this one or not. */
3852 p = find_use_name_n (name, &i, false);
3854 st = find_symbol (gfc_current_ns->sym_root,
3855 name, module_name, 1);
3857 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3859 /* Skip the specific names for these cases. */
3860 while (i == 1 && parse_atom () != ATOM_RPAREN);
3865 /* If the symbol exists already and is being USEd without being
3866 in an ONLY clause, do not load a new symtree(11.3.2). */
3867 if (!only_flag && st)
3872 /* Make the symbol inaccessible if it has been added by a USE
3873 statement without an ONLY(11.3.2). */
3875 && !st->n.sym->attr.use_only
3876 && !st->n.sym->attr.use_rename
3877 && strcmp (st->n.sym->module, module_name) == 0)
3880 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3881 st = gfc_get_unique_symtree (gfc_current_ns);
3888 if (strcmp (st->name, p) != 0)
3890 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3896 /* Since we haven't found a valid generic interface, we had
3900 gfc_get_symbol (p, NULL, &sym);
3901 sym->name = gfc_get_string (name);
3902 sym->module = gfc_get_string (module_name);
3903 sym->attr.flavor = FL_PROCEDURE;
3904 sym->attr.generic = 1;
3905 sym->attr.use_assoc = 1;
3910 /* Unless sym is a generic interface, this reference
3913 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3917 if (st && !sym->attr.generic
3920 && strcmp(module, sym->module))
3922 ambiguous_set = true;
3927 sym->attr.use_only = only_flag;
3928 sym->attr.use_rename = renamed;
3932 mio_interface_rest (&sym->generic);
3933 generic = sym->generic;
3935 else if (!sym->generic)
3937 sym->generic = generic;
3938 sym->attr.generic_copy = 1;
3941 /* If a procedure that is not generic has generic interfaces
3942 that include itself, it is generic! We need to take care
3943 to retain symbols ambiguous that were already so. */
3944 if (sym->attr.use_assoc
3945 && !sym->attr.generic
3946 && sym->attr.flavor == FL_PROCEDURE)
3948 for (gen = generic; gen; gen = gen->next)
3950 if (gen->sym == sym)
3952 sym->attr.generic = 1;
3967 /* Load common blocks. */
3972 char name[GFC_MAX_SYMBOL_LEN + 1];
3977 while (peek_atom () != ATOM_RPAREN)
3981 mio_internal_string (name);
3983 p = gfc_get_common (name, 1);
3985 mio_symbol_ref (&p->head);
3986 mio_integer (&flags);
3990 p->threadprivate = 1;
3993 /* Get whether this was a bind(c) common or not. */
3994 mio_integer (&p->is_bind_c);
3995 /* Get the binding label. */
3996 mio_internal_string (p->binding_label);
4005 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
4006 so that unused variables are not loaded and so that the expression can
4012 gfc_equiv *head, *tail, *end, *eq;
4016 in_load_equiv = true;
4018 end = gfc_current_ns->equiv;
4019 while (end != NULL && end->next != NULL)
4022 while (peek_atom () != ATOM_RPAREN) {
4026 while(peek_atom () != ATOM_RPAREN)
4029 head = tail = gfc_get_equiv ();
4032 tail->eq = gfc_get_equiv ();
4036 mio_pool_string (&tail->module);
4037 mio_expr (&tail->expr);
4040 /* Unused equivalence members have a unique name. In addition, it
4041 must be checked that the symbols are from the same module. */
4043 for (eq = head; eq; eq = eq->eq)
4045 if (eq->expr->symtree->n.sym->module
4046 && head->expr->symtree->n.sym->module
4047 && strcmp (head->expr->symtree->n.sym->module,
4048 eq->expr->symtree->n.sym->module) == 0
4049 && !check_unique_name (eq->expr->symtree->name))
4058 for (eq = head; eq; eq = head)
4061 gfc_free_expr (eq->expr);
4067 gfc_current_ns->equiv = head;
4078 in_load_equiv = false;
4082 /* This function loads the sym_root of f2k_derived with the extensions to
4083 the derived type. */
4085 load_derived_extensions (void)
4088 gfc_symbol *derived;
4092 char name[GFC_MAX_SYMBOL_LEN + 1];
4093 char module[GFC_MAX_SYMBOL_LEN + 1];
4097 while (peek_atom () != ATOM_RPAREN)
4100 mio_integer (&symbol);
4101 info = get_integer (symbol);
4102 derived = info->u.rsym.sym;
4104 /* This one is not being loaded. */
4105 if (!info || !derived)
4107 while (peek_atom () != ATOM_RPAREN)
4112 gcc_assert (derived->attr.flavor == FL_DERIVED);
4113 if (derived->f2k_derived == NULL)
4114 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4116 while (peek_atom () != ATOM_RPAREN)
4119 mio_internal_string (name);
4120 mio_internal_string (module);
4122 /* Only use one use name to find the symbol. */
4124 p = find_use_name_n (name, &j, false);
4127 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4129 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4132 /* Only use the real name in f2k_derived to ensure a single
4134 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4147 /* Recursive function to traverse the pointer_info tree and load a
4148 needed symbol. We return nonzero if we load a symbol and stop the
4149 traversal, because the act of loading can alter the tree. */
4152 load_needed (pointer_info *p)
4163 rv |= load_needed (p->left);
4164 rv |= load_needed (p->right);
4166 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4169 p->u.rsym.state = USED;
4171 set_module_locus (&p->u.rsym.where);
4173 sym = p->u.rsym.sym;
4176 q = get_integer (p->u.rsym.ns);
4178 ns = (gfc_namespace *) q->u.pointer;
4181 /* Create an interface namespace if necessary. These are
4182 the namespaces that hold the formal parameters of module
4185 ns = gfc_get_namespace (NULL, 0);
4186 associate_integer_pointer (q, ns);
4189 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4190 doesn't go pear-shaped if the symbol is used. */
4192 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4195 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4196 sym->module = gfc_get_string (p->u.rsym.module);
4197 strcpy (sym->binding_label, p->u.rsym.binding_label);
4199 associate_integer_pointer (p, sym);
4203 sym->attr.use_assoc = 1;
4205 sym->attr.use_only = 1;
4206 if (p->u.rsym.renamed)
4207 sym->attr.use_rename = 1;
4213 /* Recursive function for cleaning up things after a module has been read. */
4216 read_cleanup (pointer_info *p)
4224 read_cleanup (p->left);
4225 read_cleanup (p->right);
4227 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4230 /* Add hidden symbols to the symtree. */
4231 q = get_integer (p->u.rsym.ns);
4232 ns = (gfc_namespace *) q->u.pointer;
4234 if (!p->u.rsym.sym->attr.vtype
4235 && !p->u.rsym.sym->attr.vtab)
4236 st = gfc_get_unique_symtree (ns);
4239 /* There is no reason to use 'unique_symtrees' for vtabs or
4240 vtypes - their name is fine for a symtree and reduces the
4241 namespace pollution. */
4242 st = gfc_find_symtree (ns->sym_root, p->u.rsym.sym->name);
4244 st = gfc_new_symtree (&ns->sym_root, p->u.rsym.sym->name);
4247 st->n.sym = p->u.rsym.sym;
4250 /* Fixup any symtree references. */
4251 p->u.rsym.symtree = st;
4252 resolve_fixups (p->u.rsym.stfixup, st);
4253 p->u.rsym.stfixup = NULL;
4256 /* Free unused symbols. */
4257 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4258 gfc_free_symbol (p->u.rsym.sym);
4262 /* It is not quite enough to check for ambiguity in the symbols by
4263 the loaded symbol and the new symbol not being identical. */
4265 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4269 symbol_attribute attr;
4271 rsym = info->u.rsym.sym;
4275 if (st_sym->attr.vtab || st_sym->attr.vtype)
4278 /* If the existing symbol is generic from a different module and
4279 the new symbol is generic there can be no ambiguity. */
4280 if (st_sym->attr.generic
4282 && strcmp (st_sym->module, module_name))
4284 /* The new symbol's attributes have not yet been read. Since
4285 we need attr.generic, read it directly. */
4286 get_module_locus (&locus);
4287 set_module_locus (&info->u.rsym.where);
4290 mio_symbol_attribute (&attr);
4291 set_module_locus (&locus);
4300 /* Read a module file. */
4305 module_locus operator_interfaces, user_operators, extensions;
4307 char name[GFC_MAX_SYMBOL_LEN + 1];
4309 int ambiguous, j, nuse, symbol;
4310 pointer_info *info, *q;
4315 get_module_locus (&operator_interfaces); /* Skip these for now. */
4318 get_module_locus (&user_operators);
4322 /* Skip commons, equivalences and derived type extensions for now. */
4326 get_module_locus (&extensions);
4331 /* Create the fixup nodes for all the symbols. */
4333 while (peek_atom () != ATOM_RPAREN)
4335 require_atom (ATOM_INTEGER);
4336 info = get_integer (atom_int);
4338 info->type = P_SYMBOL;
4339 info->u.rsym.state = UNUSED;
4341 mio_internal_string (info->u.rsym.true_name);
4342 mio_internal_string (info->u.rsym.module);
4343 mio_internal_string (info->u.rsym.binding_label);
4346 require_atom (ATOM_INTEGER);
4347 info->u.rsym.ns = atom_int;
4349 get_module_locus (&info->u.rsym.where);
4352 /* See if the symbol has already been loaded by a previous module.
4353 If so, we reference the existing symbol and prevent it from
4354 being loaded again. This should not happen if the symbol being
4355 read is an index for an assumed shape dummy array (ns != 1). */
4357 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4360 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4363 info->u.rsym.state = USED;
4364 info->u.rsym.sym = sym;
4366 /* Some symbols do not have a namespace (eg. formal arguments),
4367 so the automatic "unique symtree" mechanism must be suppressed
4368 by marking them as referenced. */
4369 q = get_integer (info->u.rsym.ns);
4370 if (q->u.pointer == NULL)
4372 info->u.rsym.referenced = 1;
4376 /* If possible recycle the symtree that references the symbol.
4377 If a symtree is not found and the module does not import one,
4378 a unique-name symtree is found by read_cleanup. */
4379 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4382 info->u.rsym.symtree = st;
4383 info->u.rsym.referenced = 1;
4389 /* Parse the symtree lists. This lets us mark which symbols need to
4390 be loaded. Renaming is also done at this point by replacing the
4395 while (peek_atom () != ATOM_RPAREN)
4397 mio_internal_string (name);
4398 mio_integer (&ambiguous);
4399 mio_integer (&symbol);
4401 info = get_integer (symbol);
4403 /* See how many use names there are. If none, go through the start
4404 of the loop at least once. */
4405 nuse = number_use_names (name, false);
4406 info->u.rsym.renamed = nuse ? 1 : 0;
4411 for (j = 1; j <= nuse; j++)
4413 /* Get the jth local name for this symbol. */
4414 p = find_use_name_n (name, &j, false);
4416 if (p == NULL && strcmp (name, module_name) == 0)
4419 /* Exception: Always import vtabs & vtypes. */
4420 if (p == NULL && (strncmp (name, "__vtab_", 5) == 0
4421 || strncmp (name, "__vtype_", 6) == 0))
4424 /* Skip symtree nodes not in an ONLY clause, unless there
4425 is an existing symtree loaded from another USE statement. */
4428 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4430 info->u.rsym.symtree = st;
4434 /* If a symbol of the same name and module exists already,
4435 this symbol, which is not in an ONLY clause, must not be
4436 added to the namespace(11.3.2). Note that find_symbol
4437 only returns the first occurrence that it finds. */
4438 if (!only_flag && !info->u.rsym.renamed
4439 && strcmp (name, module_name) != 0
4440 && find_symbol (gfc_current_ns->sym_root, name,
4444 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4448 /* Check for ambiguous symbols. */
4449 if (check_for_ambiguous (st->n.sym, info))
4451 info->u.rsym.symtree = st;
4455 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4457 /* Delete the symtree if the symbol has been added by a USE
4458 statement without an ONLY(11.3.2). Remember that the rsym
4459 will be the same as the symbol found in the symtree, for
4461 if (st && (only_flag || info->u.rsym.renamed)
4462 && !st->n.sym->attr.use_only
4463 && !st->n.sym->attr.use_rename
4464 && info->u.rsym.sym == st->n.sym)
4465 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4467 /* Create a symtree node in the current namespace for this
4469 st = check_unique_name (p)
4470 ? gfc_get_unique_symtree (gfc_current_ns)
4471 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4472 st->ambiguous = ambiguous;
4474 sym = info->u.rsym.sym;
4476 /* Create a symbol node if it doesn't already exist. */
4479 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4481 sym = info->u.rsym.sym;
4482 sym->module = gfc_get_string (info->u.rsym.module);
4484 /* TODO: hmm, can we test this? Do we know it will be
4485 initialized to zeros? */
4486 if (info->u.rsym.binding_label[0] != '\0')
4487 strcpy (sym->binding_label, info->u.rsym.binding_label);
4493 if (strcmp (name, p) != 0)
4494 sym->attr.use_rename = 1;
4496 /* We need to set the only_flag here so that symbols from the
4497 same USE...ONLY but earlier are not deleted from the tree in
4498 the gfc_delete_symtree above. */
4499 sym->attr.use_only = only_flag;
4501 /* Store the symtree pointing to this symbol. */
4502 info->u.rsym.symtree = st;
4504 if (info->u.rsym.state == UNUSED)
4505 info->u.rsym.state = NEEDED;
4506 info->u.rsym.referenced = 1;
4513 /* Load intrinsic operator interfaces. */
4514 set_module_locus (&operator_interfaces);
4517 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4519 if (i == INTRINSIC_USER)
4524 u = find_use_operator ((gfc_intrinsic_op) i);
4535 mio_interface (&gfc_current_ns->op[i]);
4540 /* Load generic and user operator interfaces. These must follow the
4541 loading of symtree because otherwise symbols can be marked as
4544 set_module_locus (&user_operators);
4546 load_operator_interfaces ();
4547 load_generic_interfaces ();
4552 /* At this point, we read those symbols that are needed but haven't
4553 been loaded yet. If one symbol requires another, the other gets
4554 marked as NEEDED if its previous state was UNUSED. */
4556 while (load_needed (pi_root));
4558 /* Make sure all elements of the rename-list were found in the module. */
4560 for (u = gfc_rename_list; u; u = u->next)
4565 if (u->op == INTRINSIC_NONE)
4567 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4568 u->use_name, &u->where, module_name);
4572 if (u->op == INTRINSIC_USER)
4574 gfc_error ("User operator '%s' referenced at %L not found "
4575 "in module '%s'", u->use_name, &u->where, module_name);
4579 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4580 "in module '%s'", gfc_op2string (u->op), &u->where,
4584 /* Now we should be in a position to fill f2k_derived with derived type
4585 extensions, since everything has been loaded. */
4586 set_module_locus (&extensions);
4587 load_derived_extensions ();
4589 /* Clean up symbol nodes that were never loaded, create references
4590 to hidden symbols. */
4592 read_cleanup (pi_root);
4596 /* Given an access type that is specific to an entity and the default
4597 access, return nonzero if the entity is publicly accessible. If the
4598 element is declared as PUBLIC, then it is public; if declared
4599 PRIVATE, then private, and otherwise it is public unless the default
4600 access in this context has been declared PRIVATE. */
4603 check_access (gfc_access specific_access, gfc_access default_access)
4605 if (specific_access == ACCESS_PUBLIC)
4607 if (specific_access == ACCESS_PRIVATE)
4610 if (gfc_option.flag_module_private)
4611 return default_access == ACCESS_PUBLIC;
4613 return default_access != ACCESS_PRIVATE;
4618 gfc_check_symbol_access (gfc_symbol *sym)
4620 if (sym->attr.vtab || sym->attr.vtype)
4623 return check_access (sym->attr.access, sym->ns->default_access);
4627 /* A structure to remember which commons we've already written. */
4629 struct written_common
4631 BBT_HEADER(written_common);
4632 const char *name, *label;
4635 static struct written_common *written_commons = NULL;
4637 /* Comparison function used for balancing the binary tree. */
4640 compare_written_commons (void *a1, void *b1)
4642 const char *aname = ((struct written_common *) a1)->name;
4643 const char *alabel = ((struct written_common *) a1)->label;
4644 const char *bname = ((struct written_common *) b1)->name;
4645 const char *blabel = ((struct written_common *) b1)->label;
4646 int c = strcmp (aname, bname);
4648 return (c != 0 ? c : strcmp (alabel, blabel));
4651 /* Free a list of written commons. */
4654 free_written_common (struct written_common *w)
4660 free_written_common (w->left);
4662 free_written_common (w->right);
4667 /* Write a common block to the module -- recursive helper function. */
4670 write_common_0 (gfc_symtree *st, bool this_module)
4676 struct written_common *w;
4677 bool write_me = true;
4682 write_common_0 (st->left, this_module);
4684 /* We will write out the binding label, or the name if no label given. */
4685 name = st->n.common->name;
4687 label = p->is_bind_c ? p->binding_label : p->name;
4689 /* Check if we've already output this common. */
4690 w = written_commons;
4693 int c = strcmp (name, w->name);
4694 c = (c != 0 ? c : strcmp (label, w->label));
4698 w = (c < 0) ? w->left : w->right;
4701 if (this_module && p->use_assoc)
4706 /* Write the common to the module. */
4708 mio_pool_string (&name);
4710 mio_symbol_ref (&p->head);
4711 flags = p->saved ? 1 : 0;
4712 if (p->threadprivate)
4714 mio_integer (&flags);
4716 /* Write out whether the common block is bind(c) or not. */
4717 mio_integer (&(p->is_bind_c));
4719 mio_pool_string (&label);
4722 /* Record that we have written this common. */
4723 w = XCNEW (struct written_common);
4726 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4729 write_common_0 (st->right, this_module);
4733 /* Write a common, by initializing the list of written commons, calling
4734 the recursive function write_common_0() and cleaning up afterwards. */
4737 write_common (gfc_symtree *st)
4739 written_commons = NULL;
4740 write_common_0 (st, true);
4741 write_common_0 (st, false);
4742 free_written_common (written_commons);
4743 written_commons = NULL;
4747 /* Write the blank common block to the module. */
4750 write_blank_common (void)
4752 const char * name = BLANK_COMMON_NAME;
4754 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4755 this, but it hasn't been checked. Just making it so for now. */
4758 if (gfc_current_ns->blank_common.head == NULL)
4763 mio_pool_string (&name);
4765 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4766 saved = gfc_current_ns->blank_common.saved;
4767 mio_integer (&saved);
4769 /* Write out whether the common block is bind(c) or not. */
4770 mio_integer (&is_bind_c);
4772 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4773 it doesn't matter because the label isn't used. */
4774 mio_pool_string (&name);
4780 /* Write equivalences to the module. */
4789 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4793 for (e = eq; e; e = e->eq)
4795 if (e->module == NULL)
4796 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4797 mio_allocated_string (e->module);
4798 mio_expr (&e->expr);
4807 /* Write derived type extensions to the module. */
4810 write_dt_extensions (gfc_symtree *st)
4812 if (!gfc_check_symbol_access (st->n.sym))
4816 mio_pool_string (&st->n.sym->name);
4817 if (st->n.sym->module != NULL)
4818 mio_pool_string (&st->n.sym->module);
4820 mio_internal_string (module_name);
4825 write_derived_extensions (gfc_symtree *st)
4827 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4828 && (st->n.sym->f2k_derived != NULL)
4829 && (st->n.sym->f2k_derived->sym_root != NULL)))
4833 mio_symbol_ref (&(st->n.sym));
4834 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4835 write_dt_extensions);
4840 /* Write a symbol to the module. */
4843 write_symbol (int n, gfc_symbol *sym)
4847 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4848 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4851 mio_pool_string (&sym->name);
4853 mio_pool_string (&sym->module);
4854 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4856 label = sym->binding_label;
4857 mio_pool_string (&label);
4860 mio_pool_string (&sym->name);
4862 mio_pointer_ref (&sym->ns);
4869 /* Recursive traversal function to write the initial set of symbols to
4870 the module. We check to see if the symbol should be written
4871 according to the access specification. */
4874 write_symbol0 (gfc_symtree *st)
4878 bool dont_write = false;
4883 write_symbol0 (st->left);
4886 if (sym->module == NULL)
4887 sym->module = gfc_get_string (module_name);
4889 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4890 && !sym->attr.subroutine && !sym->attr.function)
4893 if (!gfc_check_symbol_access (sym))
4898 p = get_pointer (sym);
4899 if (p->type == P_UNKNOWN)
4902 if (p->u.wsym.state != WRITTEN)
4904 write_symbol (p->integer, sym);
4905 p->u.wsym.state = WRITTEN;
4909 write_symbol0 (st->right);
4913 /* Recursive traversal function to write the secondary set of symbols
4914 to the module file. These are symbols that were not public yet are
4915 needed by the public symbols or another dependent symbol. The act
4916 of writing a symbol can modify the pointer_info tree, so we cease
4917 traversal if we find a symbol to write. We return nonzero if a
4918 symbol was written and pass that information upwards. */
4921 write_symbol1 (pointer_info *p)
4928 result = write_symbol1 (p->left);
4930 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4932 p->u.wsym.state = WRITTEN;
4933 write_symbol (p->integer, p->u.wsym.sym);
4937 result |= write_symbol1 (p->right);
4942 /* Write operator interfaces associated with a symbol. */
4945 write_operator (gfc_user_op *uop)
4947 static char nullstring[] = "";
4948 const char *p = nullstring;
4950 if (uop->op == NULL || !check_access (uop->access, uop->ns->default_access))
4953 mio_symbol_interface (&uop->name, &p, &uop->op);
4957 /* Write generic interfaces from the namespace sym_root. */
4960 write_generic (gfc_symtree *st)
4967 write_generic (st->left);
4968 write_generic (st->right);
4971 if (!sym || check_unique_name (st->name))
4974 if (sym->generic == NULL || !gfc_check_symbol_access (sym))
4977 if (sym->module == NULL)
4978 sym->module = gfc_get_string (module_name);
4980 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4985 write_symtree (gfc_symtree *st)
4992 /* A symbol in an interface body must not be visible in the
4994 if (sym->ns != gfc_current_ns
4995 && sym->ns->proc_name
4996 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
4999 if (!gfc_check_symbol_access (sym)
5000 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
5001 && !sym->attr.subroutine && !sym->attr.function))
5004 if (check_unique_name (st->name))
5007 p = find_pointer (sym);
5009 gfc_internal_error ("write_symtree(): Symbol not written");
5011 mio_pool_string (&st->name);
5012 mio_integer (&st->ambiguous);
5013 mio_integer (&p->integer);
5022 /* Write the operator interfaces. */
5025 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
5027 if (i == INTRINSIC_USER)
5030 mio_interface (check_access (gfc_current_ns->operator_access[i],
5031 gfc_current_ns->default_access)
5032 ? &gfc_current_ns->op[i] : NULL);
5040 gfc_traverse_user_op (gfc_current_ns, write_operator);
5046 write_generic (gfc_current_ns->sym_root);
5052 write_blank_common ();
5053 write_common (gfc_current_ns->common_root);
5065 gfc_traverse_symtree (gfc_current_ns->sym_root,
5066 write_derived_extensions);
5071 /* Write symbol information. First we traverse all symbols in the
5072 primary namespace, writing those that need to be written.
5073 Sometimes writing one symbol will cause another to need to be
5074 written. A list of these symbols ends up on the write stack, and
5075 we end by popping the bottom of the stack and writing the symbol
5076 until the stack is empty. */
5080 write_symbol0 (gfc_current_ns->sym_root);
5081 while (write_symbol1 (pi_root))
5090 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
5095 /* Read a MD5 sum from the header of a module file. If the file cannot
5096 be opened, or we have any other error, we return -1. */
5099 read_md5_from_module_file (const char * filename, unsigned char md5[16])
5105 /* Open the file. */
5106 if ((file = fopen (filename, "r")) == NULL)
5109 /* Read the first line. */
5110 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5116 /* The file also needs to be overwritten if the version number changed. */
5117 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
5118 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
5124 /* Read a second line. */
5125 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5131 /* Close the file. */
5134 /* If the header is not what we expect, or is too short, bail out. */
5135 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5138 /* Now, we have a real MD5, read it into the array. */
5139 for (n = 0; n < 16; n++)
5143 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5153 /* Given module, dump it to disk. If there was an error while
5154 processing the module, dump_flag will be set to zero and we delete
5155 the module file, even if it was already there. */
5158 gfc_dump_module (const char *name, int dump_flag)
5161 char *filename, *filename_tmp, *p;
5164 unsigned char md5_new[16], md5_old[16];
5166 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5167 if (gfc_option.module_dir != NULL)
5169 n += strlen (gfc_option.module_dir);
5170 filename = (char *) alloca (n);
5171 strcpy (filename, gfc_option.module_dir);
5172 strcat (filename, name);
5176 filename = (char *) alloca (n);
5177 strcpy (filename, name);
5179 strcat (filename, MODULE_EXTENSION);
5181 /* Name of the temporary file used to write the module. */
5182 filename_tmp = (char *) alloca (n + 1);
5183 strcpy (filename_tmp, filename);
5184 strcat (filename_tmp, "0");
5186 /* There was an error while processing the module. We delete the
5187 module file, even if it was already there. */
5194 if (gfc_cpp_makedep ())
5195 gfc_cpp_add_target (filename);
5197 /* Write the module to the temporary file. */
5198 module_fp = fopen (filename_tmp, "w");
5199 if (module_fp == NULL)
5200 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5201 filename_tmp, xstrerror (errno));
5203 /* Write the header, including space reserved for the MD5 sum. */
5207 *strchr (p, '\n') = '\0';
5209 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5210 "MD5:", MOD_VERSION, gfc_source_file, p);
5211 fgetpos (module_fp, &md5_pos);
5212 fputs ("00000000000000000000000000000000 -- "
5213 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5215 /* Initialize the MD5 context that will be used for output. */
5216 md5_init_ctx (&ctx);
5218 /* Write the module itself. */
5220 strcpy (module_name, name);
5226 free_pi_tree (pi_root);
5231 /* Write the MD5 sum to the header of the module file. */
5232 md5_finish_ctx (&ctx, md5_new);
5233 fsetpos (module_fp, &md5_pos);
5234 for (n = 0; n < 16; n++)
5235 fprintf (module_fp, "%02x", md5_new[n]);
5237 if (fclose (module_fp))
5238 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5239 filename_tmp, xstrerror (errno));
5241 /* Read the MD5 from the header of the old module file and compare. */
5242 if (read_md5_from_module_file (filename, md5_old) != 0
5243 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5245 /* Module file have changed, replace the old one. */
5246 if (unlink (filename) && errno != ENOENT)
5247 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5249 if (rename (filename_tmp, filename))
5250 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5251 filename_tmp, filename, xstrerror (errno));
5255 if (unlink (filename_tmp))
5256 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5257 filename_tmp, xstrerror (errno));
5263 create_intrinsic_function (const char *name, gfc_isym_id id,
5264 const char *modname, intmod_id module)
5266 gfc_intrinsic_sym *isym;
5267 gfc_symtree *tmp_symtree;
5270 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5273 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5275 gfc_error ("Symbol '%s' already declared", name);
5278 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5279 sym = tmp_symtree->n.sym;
5281 isym = gfc_intrinsic_function_by_id (id);
5284 sym->attr.flavor = FL_PROCEDURE;
5285 sym->attr.intrinsic = 1;
5287 sym->module = gfc_get_string (modname);
5288 sym->attr.use_assoc = 1;
5289 sym->from_intmod = module;
5290 sym->intmod_sym_id = id;
5294 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5295 the current namespace for all named constants, pointer types, and
5296 procedures in the module unless the only clause was used or a rename
5297 list was provided. */
5300 import_iso_c_binding_module (void)
5302 gfc_symbol *mod_sym = NULL;
5303 gfc_symtree *mod_symtree = NULL;
5304 const char *iso_c_module_name = "__iso_c_binding";
5308 /* Look only in the current namespace. */
5309 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5311 if (mod_symtree == NULL)
5313 /* symtree doesn't already exist in current namespace. */
5314 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5317 if (mod_symtree != NULL)
5318 mod_sym = mod_symtree->n.sym;
5320 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5321 "create symbol for %s", iso_c_module_name);
5323 mod_sym->attr.flavor = FL_MODULE;
5324 mod_sym->attr.intrinsic = 1;
5325 mod_sym->module = gfc_get_string (iso_c_module_name);
5326 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5329 /* Generate the symbols for the named constants representing
5330 the kinds for intrinsic data types. */
5331 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5334 for (u = gfc_rename_list; u; u = u->next)
5335 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5341 #define NAMED_FUNCTION(a,b,c,d) \
5343 create_intrinsic_function (u->local_name[0] ? u->local_name \
5346 iso_c_module_name, \
5347 INTMOD_ISO_C_BINDING); \
5349 #include "iso-c-binding.def"
5350 #undef NAMED_FUNCTION
5353 generate_isocbinding_symbol (iso_c_module_name,
5354 (iso_c_binding_symbol) i,
5355 u->local_name[0] ? u->local_name
5360 if (!found && !only_flag)
5363 #define NAMED_FUNCTION(a,b,c,d) \
5365 if ((gfc_option.allow_std & d) == 0) \
5367 create_intrinsic_function (b, (gfc_isym_id) c, \
5368 iso_c_module_name, \
5369 INTMOD_ISO_C_BINDING); \
5371 #include "iso-c-binding.def"
5372 #undef NAMED_FUNCTION
5375 generate_isocbinding_symbol (iso_c_module_name,
5376 (iso_c_binding_symbol) i, NULL);
5380 for (u = gfc_rename_list; u; u = u->next)
5385 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5386 "module ISO_C_BINDING", u->use_name, &u->where);
5391 /* Add an integer named constant from a given module. */
5394 create_int_parameter (const char *name, int value, const char *modname,
5395 intmod_id module, int id)
5397 gfc_symtree *tmp_symtree;
5400 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5401 if (tmp_symtree != NULL)
5403 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5406 gfc_error ("Symbol '%s' already declared", name);
5409 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5410 sym = tmp_symtree->n.sym;
5412 sym->module = gfc_get_string (modname);
5413 sym->attr.flavor = FL_PARAMETER;
5414 sym->ts.type = BT_INTEGER;
5415 sym->ts.kind = gfc_default_integer_kind;
5416 sym->value = gfc_get_int_expr (gfc_default_integer_kind, NULL, value);
5417 sym->attr.use_assoc = 1;
5418 sym->from_intmod = module;
5419 sym->intmod_sym_id = id;
5423 /* Value is already contained by the array constructor, but not
5427 create_int_parameter_array (const char *name, int size, gfc_expr *value,
5428 const char *modname, intmod_id module, int id)
5430 gfc_symtree *tmp_symtree;
5433 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5434 if (tmp_symtree != NULL)
5436 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5439 gfc_error ("Symbol '%s' already declared", name);
5442 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5443 sym = tmp_symtree->n.sym;
5445 sym->module = gfc_get_string (modname);
5446 sym->attr.flavor = FL_PARAMETER;
5447 sym->ts.type = BT_INTEGER;
5448 sym->ts.kind = gfc_default_integer_kind;
5449 sym->attr.use_assoc = 1;
5450 sym->from_intmod = module;
5451 sym->intmod_sym_id = id;
5452 sym->attr.dimension = 1;
5453 sym->as = gfc_get_array_spec ();
5455 sym->as->type = AS_EXPLICIT;
5456 sym->as->lower[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
5457 sym->as->upper[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, size);
5460 sym->value->shape = gfc_get_shape (1);
5461 mpz_init_set_ui (sym->value->shape[0], size);
5466 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5469 use_iso_fortran_env_module (void)
5471 static char mod[] = "iso_fortran_env";
5473 gfc_symbol *mod_sym;
5474 gfc_symtree *mod_symtree;
5478 intmod_sym symbol[] = {
5479 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5480 #include "iso-fortran-env.def"
5482 #define NAMED_KINDARRAY(a,b,c,d) { a, b, 0, d },
5483 #include "iso-fortran-env.def"
5484 #undef NAMED_KINDARRAY
5485 #define NAMED_FUNCTION(a,b,c,d) { a, b, c, d },
5486 #include "iso-fortran-env.def"
5487 #undef NAMED_FUNCTION
5488 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5491 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5492 #include "iso-fortran-env.def"
5495 /* Generate the symbol for the module itself. */
5496 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5497 if (mod_symtree == NULL)
5499 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5500 gcc_assert (mod_symtree);
5501 mod_sym = mod_symtree->n.sym;
5503 mod_sym->attr.flavor = FL_MODULE;
5504 mod_sym->attr.intrinsic = 1;
5505 mod_sym->module = gfc_get_string (mod);
5506 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5509 if (!mod_symtree->n.sym->attr.intrinsic)
5510 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5511 "non-intrinsic module name used previously", mod);
5513 /* Generate the symbols for the module integer named constants. */
5515 for (i = 0; symbol[i].name; i++)
5518 for (u = gfc_rename_list; u; u = u->next)
5520 if (strcmp (symbol[i].name, u->use_name) == 0)
5525 if (gfc_notify_std (symbol[i].standard, "The symbol '%s', "
5526 "referrenced at %C, is not in the selected "
5527 "standard", symbol[i].name) == FAILURE)
5530 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5531 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5532 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named "
5533 "constant from intrinsic module "
5534 "ISO_FORTRAN_ENV at %C is incompatible with "
5536 gfc_option.flag_default_integer
5537 ? "-fdefault-integer-8"
5538 : "-fdefault-real-8");
5539 switch (symbol[i].id)
5541 #define NAMED_INTCST(a,b,c,d) \
5543 #include "iso-fortran-env.def"
5545 create_int_parameter (u->local_name[0] ? u->local_name
5547 symbol[i].value, mod,
5548 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5551 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5553 expr = gfc_get_array_expr (BT_INTEGER, \
5554 gfc_default_integer_kind,\
5556 for (j = 0; KINDS[j].kind != 0; j++) \
5557 gfc_constructor_append_expr (&expr->value.constructor, \
5558 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5559 KINDS[j].kind), NULL); \
5560 create_int_parameter_array (u->local_name[0] ? u->local_name \
5563 INTMOD_ISO_FORTRAN_ENV, \
5566 #include "iso-fortran-env.def"
5567 #undef NAMED_KINDARRAY
5569 #define NAMED_FUNCTION(a,b,c,d) \
5571 #include "iso-fortran-env.def"
5572 #undef NAMED_FUNCTION
5573 create_intrinsic_function (u->local_name[0] ? u->local_name
5575 (gfc_isym_id) symbol[i].value, mod,
5576 INTMOD_ISO_FORTRAN_ENV);
5585 if (!found && !only_flag)
5587 if ((gfc_option.allow_std & symbol[i].standard) == 0)
5590 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5591 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5592 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5593 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5594 "incompatible with option %s",
5595 gfc_option.flag_default_integer
5596 ? "-fdefault-integer-8" : "-fdefault-real-8");
5598 switch (symbol[i].id)
5600 #define NAMED_INTCST(a,b,c,d) \
5602 #include "iso-fortran-env.def"
5604 create_int_parameter (symbol[i].name, symbol[i].value, mod,
5605 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5608 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5610 expr = gfc_get_array_expr (BT_INTEGER, gfc_default_integer_kind, \
5612 for (j = 0; KINDS[j].kind != 0; j++) \
5613 gfc_constructor_append_expr (&expr->value.constructor, \
5614 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5615 KINDS[j].kind), NULL); \
5616 create_int_parameter_array (symbol[i].name, j, expr, mod, \
5617 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);\
5619 #include "iso-fortran-env.def"
5620 #undef NAMED_KINDARRAY
5622 #define NAMED_FUNCTION(a,b,c,d) \
5624 #include "iso-fortran-env.def"
5625 #undef NAMED_FUNCTION
5626 create_intrinsic_function (symbol[i].name,
5627 (gfc_isym_id) symbol[i].value, mod,
5628 INTMOD_ISO_FORTRAN_ENV);
5637 for (u = gfc_rename_list; u; u = u->next)
5642 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5643 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5648 /* Process a USE directive. */
5651 gfc_use_module (void)
5656 gfc_symtree *mod_symtree;
5657 gfc_use_list *use_stmt;
5659 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5661 strcpy (filename, module_name);
5662 strcat (filename, MODULE_EXTENSION);
5664 /* First, try to find an non-intrinsic module, unless the USE statement
5665 specified that the module is intrinsic. */
5668 module_fp = gfc_open_included_file (filename, true, true);
5670 /* Then, see if it's an intrinsic one, unless the USE statement
5671 specified that the module is non-intrinsic. */
5672 if (module_fp == NULL && !specified_nonint)
5674 if (strcmp (module_name, "iso_fortran_env") == 0
5675 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5676 "intrinsic module at %C") != FAILURE)
5678 use_iso_fortran_env_module ();
5682 if (strcmp (module_name, "iso_c_binding") == 0
5683 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5684 "ISO_C_BINDING module at %C") != FAILURE)
5686 import_iso_c_binding_module();
5690 module_fp = gfc_open_intrinsic_module (filename);
5692 if (module_fp == NULL && specified_int)
5693 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5697 if (module_fp == NULL)
5698 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5699 filename, xstrerror (errno));
5701 /* Check that we haven't already USEd an intrinsic module with the
5704 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5705 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5706 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5707 "intrinsic module name used previously", module_name);
5714 /* Skip the first two lines of the module, after checking that this is
5715 a gfortran module file. */
5721 bad_module ("Unexpected end of module");
5724 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5725 || (start == 2 && strcmp (atom_name, " module") != 0))
5726 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5730 if (strcmp (atom_name, " version") != 0
5731 || module_char () != ' '
5732 || parse_atom () != ATOM_STRING)
5733 gfc_fatal_error ("Parse error when checking module version"
5734 " for file '%s' opened at %C", filename);
5736 if (strcmp (atom_string, MOD_VERSION))
5738 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5739 "for file '%s' opened at %C", atom_string,
5740 MOD_VERSION, filename);
5743 gfc_free (atom_string);
5750 /* Make sure we're not reading the same module that we may be building. */
5751 for (p = gfc_state_stack; p; p = p->previous)
5752 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5753 gfc_fatal_error ("Can't USE the same module we're building!");
5756 init_true_name_tree ();
5760 free_true_name (true_name_root);
5761 true_name_root = NULL;
5763 free_pi_tree (pi_root);
5768 use_stmt = gfc_get_use_list ();
5769 use_stmt->module_name = gfc_get_string (module_name);
5770 use_stmt->only_flag = only_flag;
5771 use_stmt->rename = gfc_rename_list;
5772 use_stmt->where = use_locus;
5773 gfc_rename_list = NULL;
5774 use_stmt->next = gfc_current_ns->use_stmts;
5775 gfc_current_ns->use_stmts = use_stmt;
5780 gfc_free_use_stmts (gfc_use_list *use_stmts)
5783 for (; use_stmts; use_stmts = next)
5785 gfc_use_rename *next_rename;
5787 for (; use_stmts->rename; use_stmts->rename = next_rename)
5789 next_rename = use_stmts->rename->next;
5790 gfc_free (use_stmts->rename);
5792 next = use_stmts->next;
5793 gfc_free (use_stmts);
5799 gfc_module_init_2 (void)
5801 last_atom = ATOM_LPAREN;
5806 gfc_module_done_2 (void)