1 /* Handle modules, which amounts to loading and saving symbols and
2 their attendant structures.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
5 Free Software Foundation, Inc.
6 Contributed by Andy Vaught
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
25 sequence of atoms, which can be left or right parenthesis, names,
26 integers or strings. Parenthesis are always matched which allows
27 us to skip over sections at high speed without having to know
28 anything about the internal structure of the lists. A "name" is
29 usually a fortran 95 identifier, but can also start with '@' in
30 order to reference a hidden symbol.
32 The first line of a module is an informational message about what
33 created the module, the file it came from and when it was created.
34 The second line is a warning for people not to edit the module.
35 The rest of the module looks like:
37 ( ( <Interface info for UPLUS> )
38 ( <Interface info for UMINUS> )
41 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
44 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
47 ( ( <common name> <symbol> <saved flag>)
53 ( <Symbol Number (in no particular order)>
55 <Module name of symbol>
56 ( <symbol information> )
65 In general, symbols refer to other symbols by their symbol number,
66 which are zero based. Symbols are written to the module in no
74 #include "parse.h" /* FIXME */
76 #include "constructor.h"
79 #define MODULE_EXTENSION ".mod"
81 /* Don't put any single quote (') in MOD_VERSION,
82 if yout want it to be recognized. */
83 #define MOD_VERSION "7"
86 /* Structure that describes a position within a module file. */
95 /* Structure for list of symbols of intrinsic modules. */
108 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
112 /* The fixup structure lists pointers to pointers that have to
113 be updated when a pointer value becomes known. */
115 typedef struct fixup_t
118 struct fixup_t *next;
123 /* Structure for holding extra info needed for pointers being read. */
139 typedef struct pointer_info
141 BBT_HEADER (pointer_info);
145 /* The first component of each member of the union is the pointer
152 void *pointer; /* Member for doing pointer searches. */
157 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
158 enum gfc_rsym_state state;
159 int ns, referenced, renamed;
162 gfc_symtree *symtree;
163 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
170 enum gfc_wsym_state state;
179 #define gfc_get_pointer_info() XCNEW (pointer_info)
182 /* Local variables */
184 /* The FILE for the module we're reading or writing. */
185 static FILE *module_fp;
187 /* MD5 context structure. */
188 static struct md5_ctx ctx;
190 /* The name of the module we're reading (USE'ing) or writing. */
191 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
193 /* The way the module we're reading was specified. */
194 static bool specified_nonint, specified_int;
196 static int module_line, module_column, only_flag;
198 { IO_INPUT, IO_OUTPUT }
201 static gfc_use_rename *gfc_rename_list;
202 static pointer_info *pi_root;
203 static int symbol_number; /* Counter for assigning symbol numbers */
205 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
206 static bool in_load_equiv;
208 static locus use_locus;
212 /*****************************************************************/
214 /* Pointer/integer conversion. Pointers between structures are stored
215 as integers in the module file. The next couple of subroutines
216 handle this translation for reading and writing. */
218 /* Recursively free the tree of pointer structures. */
221 free_pi_tree (pointer_info *p)
226 if (p->fixup != NULL)
227 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
229 free_pi_tree (p->left);
230 free_pi_tree (p->right);
236 /* Compare pointers when searching by pointer. Used when writing a
240 compare_pointers (void *_sn1, void *_sn2)
242 pointer_info *sn1, *sn2;
244 sn1 = (pointer_info *) _sn1;
245 sn2 = (pointer_info *) _sn2;
247 if (sn1->u.pointer < sn2->u.pointer)
249 if (sn1->u.pointer > sn2->u.pointer)
256 /* Compare integers when searching by integer. Used when reading a
260 compare_integers (void *_sn1, void *_sn2)
262 pointer_info *sn1, *sn2;
264 sn1 = (pointer_info *) _sn1;
265 sn2 = (pointer_info *) _sn2;
267 if (sn1->integer < sn2->integer)
269 if (sn1->integer > sn2->integer)
276 /* Initialize the pointer_info tree. */
285 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
287 /* Pointer 0 is the NULL pointer. */
288 p = gfc_get_pointer_info ();
293 gfc_insert_bbt (&pi_root, p, compare);
295 /* Pointer 1 is the current namespace. */
296 p = gfc_get_pointer_info ();
297 p->u.pointer = gfc_current_ns;
299 p->type = P_NAMESPACE;
301 gfc_insert_bbt (&pi_root, p, compare);
307 /* During module writing, call here with a pointer to something,
308 returning the pointer_info node. */
310 static pointer_info *
311 find_pointer (void *gp)
318 if (p->u.pointer == gp)
320 p = (gp < p->u.pointer) ? p->left : p->right;
327 /* Given a pointer while writing, returns the pointer_info tree node,
328 creating it if it doesn't exist. */
330 static pointer_info *
331 get_pointer (void *gp)
335 p = find_pointer (gp);
339 /* Pointer doesn't have an integer. Give it one. */
340 p = gfc_get_pointer_info ();
343 p->integer = symbol_number++;
345 gfc_insert_bbt (&pi_root, p, compare_pointers);
351 /* Given an integer during reading, find it in the pointer_info tree,
352 creating the node if not found. */
354 static pointer_info *
355 get_integer (int integer)
365 c = compare_integers (&t, p);
369 p = (c < 0) ? p->left : p->right;
375 p = gfc_get_pointer_info ();
376 p->integer = integer;
379 gfc_insert_bbt (&pi_root, p, compare_integers);
385 /* Recursive function to find a pointer within a tree by brute force. */
387 static pointer_info *
388 fp2 (pointer_info *p, const void *target)
395 if (p->u.pointer == target)
398 q = fp2 (p->left, target);
402 return fp2 (p->right, target);
406 /* During reading, find a pointer_info node from the pointer value.
407 This amounts to a brute-force search. */
409 static pointer_info *
410 find_pointer2 (void *p)
412 return fp2 (pi_root, p);
416 /* Resolve any fixups using a known pointer. */
419 resolve_fixups (fixup_t *f, void *gp)
432 /* Call here during module reading when we know what pointer to
433 associate with an integer. Any fixups that exist are resolved at
437 associate_integer_pointer (pointer_info *p, void *gp)
439 if (p->u.pointer != NULL)
440 gfc_internal_error ("associate_integer_pointer(): Already associated");
444 resolve_fixups (p->fixup, gp);
450 /* During module reading, given an integer and a pointer to a pointer,
451 either store the pointer from an already-known value or create a
452 fixup structure in order to store things later. Returns zero if
453 the reference has been actually stored, or nonzero if the reference
454 must be fixed later (i.e., associate_integer_pointer must be called
455 sometime later. Returns the pointer_info structure. */
457 static pointer_info *
458 add_fixup (int integer, void *gp)
464 p = get_integer (integer);
466 if (p->integer == 0 || p->u.pointer != NULL)
469 *cp = (char *) p->u.pointer;
478 f->pointer = (void **) gp;
485 /*****************************************************************/
487 /* Parser related subroutines */
489 /* Free the rename list left behind by a USE statement. */
494 gfc_use_rename *next;
496 for (; gfc_rename_list; gfc_rename_list = next)
498 next = gfc_rename_list->next;
499 free (gfc_rename_list);
504 /* Match a USE statement. */
509 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
510 gfc_use_rename *tail = NULL, *new_use;
511 interface_type type, type2;
515 specified_int = false;
516 specified_nonint = false;
518 if (gfc_match (" , ") == MATCH_YES)
520 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
522 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
523 "nature in USE statement at %C") == FAILURE)
526 if (strcmp (module_nature, "intrinsic") == 0)
527 specified_int = true;
530 if (strcmp (module_nature, "non_intrinsic") == 0)
531 specified_nonint = true;
534 gfc_error ("Module nature in USE statement at %C shall "
535 "be either INTRINSIC or NON_INTRINSIC");
542 /* Help output a better error message than "Unclassifiable
544 gfc_match (" %n", module_nature);
545 if (strcmp (module_nature, "intrinsic") == 0
546 || strcmp (module_nature, "non_intrinsic") == 0)
547 gfc_error ("\"::\" was expected after module nature at %C "
548 "but was not found");
554 m = gfc_match (" ::");
555 if (m == MATCH_YES &&
556 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
557 "\"USE :: module\" at %C") == FAILURE)
562 m = gfc_match ("% ");
568 use_locus = gfc_current_locus;
570 m = gfc_match_name (module_name);
577 if (gfc_match_eos () == MATCH_YES)
579 if (gfc_match_char (',') != MATCH_YES)
582 if (gfc_match (" only :") == MATCH_YES)
585 if (gfc_match_eos () == MATCH_YES)
590 /* Get a new rename struct and add it to the rename list. */
591 new_use = gfc_get_use_rename ();
592 new_use->where = gfc_current_locus;
595 if (gfc_rename_list == NULL)
596 gfc_rename_list = new_use;
598 tail->next = new_use;
601 /* See what kind of interface we're dealing with. Assume it is
603 new_use->op = INTRINSIC_NONE;
604 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
609 case INTERFACE_NAMELESS:
610 gfc_error ("Missing generic specification in USE statement at %C");
613 case INTERFACE_USER_OP:
614 case INTERFACE_GENERIC:
615 m = gfc_match (" =>");
617 if (type == INTERFACE_USER_OP && m == MATCH_YES
618 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
619 "operators in USE statements at %C")
623 if (type == INTERFACE_USER_OP)
624 new_use->op = INTRINSIC_USER;
629 strcpy (new_use->use_name, name);
632 strcpy (new_use->local_name, name);
633 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
638 if (m == MATCH_ERROR)
646 strcpy (new_use->local_name, name);
648 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
653 if (m == MATCH_ERROR)
657 if (strcmp (new_use->use_name, module_name) == 0
658 || strcmp (new_use->local_name, module_name) == 0)
660 gfc_error ("The name '%s' at %C has already been used as "
661 "an external module name.", module_name);
666 case INTERFACE_INTRINSIC_OP:
674 if (gfc_match_eos () == MATCH_YES)
676 if (gfc_match_char (',') != MATCH_YES)
683 gfc_syntax_error (ST_USE);
691 /* Given a name and a number, inst, return the inst name
692 under which to load this symbol. Returns NULL if this
693 symbol shouldn't be loaded. If inst is zero, returns
694 the number of instances of this name. If interface is
695 true, a user-defined operator is sought, otherwise only
696 non-operators are sought. */
699 find_use_name_n (const char *name, int *inst, bool interface)
705 for (u = gfc_rename_list; u; u = u->next)
707 if (strcmp (u->use_name, name) != 0
708 || (u->op == INTRINSIC_USER && !interface)
709 || (u->op != INTRINSIC_USER && interface))
722 return only_flag ? NULL : name;
726 return (u->local_name[0] != '\0') ? u->local_name : name;
730 /* Given a name, return the name under which to load this symbol.
731 Returns NULL if this symbol shouldn't be loaded. */
734 find_use_name (const char *name, bool interface)
737 return find_use_name_n (name, &i, interface);
741 /* Given a real name, return the number of use names associated with it. */
744 number_use_names (const char *name, bool interface)
747 find_use_name_n (name, &i, interface);
752 /* Try to find the operator in the current list. */
754 static gfc_use_rename *
755 find_use_operator (gfc_intrinsic_op op)
759 for (u = gfc_rename_list; u; u = u->next)
767 /*****************************************************************/
769 /* The next couple of subroutines maintain a tree used to avoid a
770 brute-force search for a combination of true name and module name.
771 While symtree names, the name that a particular symbol is known by
772 can changed with USE statements, we still have to keep track of the
773 true names to generate the correct reference, and also avoid
774 loading the same real symbol twice in a program unit.
776 When we start reading, the true name tree is built and maintained
777 as symbols are read. The tree is searched as we load new symbols
778 to see if it already exists someplace in the namespace. */
780 typedef struct true_name
782 BBT_HEADER (true_name);
787 static true_name *true_name_root;
790 /* Compare two true_name structures. */
793 compare_true_names (void *_t1, void *_t2)
798 t1 = (true_name *) _t1;
799 t2 = (true_name *) _t2;
801 c = ((t1->sym->module > t2->sym->module)
802 - (t1->sym->module < t2->sym->module));
806 return strcmp (t1->sym->name, t2->sym->name);
810 /* Given a true name, search the true name tree to see if it exists
811 within the main namespace. */
814 find_true_name (const char *name, const char *module)
820 sym.name = gfc_get_string (name);
822 sym.module = gfc_get_string (module);
830 c = compare_true_names ((void *) (&t), (void *) p);
834 p = (c < 0) ? p->left : p->right;
841 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
844 add_true_name (gfc_symbol *sym)
848 t = XCNEW (true_name);
851 gfc_insert_bbt (&true_name_root, t, compare_true_names);
855 /* Recursive function to build the initial true name tree by
856 recursively traversing the current namespace. */
859 build_tnt (gfc_symtree *st)
864 build_tnt (st->left);
865 build_tnt (st->right);
867 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
870 add_true_name (st->n.sym);
874 /* Initialize the true name tree with the current namespace. */
877 init_true_name_tree (void)
879 true_name_root = NULL;
880 build_tnt (gfc_current_ns->sym_root);
884 /* Recursively free a true name tree node. */
887 free_true_name (true_name *t)
891 free_true_name (t->left);
892 free_true_name (t->right);
898 /*****************************************************************/
900 /* Module reading and writing. */
904 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
908 static atom_type last_atom;
911 /* The name buffer must be at least as long as a symbol name. Right
912 now it's not clear how we're going to store numeric constants--
913 probably as a hexadecimal string, since this will allow the exact
914 number to be preserved (this can't be done by a decimal
915 representation). Worry about that later. TODO! */
917 #define MAX_ATOM_SIZE 100
920 static char *atom_string, atom_name[MAX_ATOM_SIZE];
923 /* Report problems with a module. Error reporting is not very
924 elaborate, since this sorts of errors shouldn't really happen.
925 This subroutine never returns. */
927 static void bad_module (const char *) ATTRIBUTE_NORETURN;
930 bad_module (const char *msgid)
937 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
938 module_name, module_line, module_column, msgid);
941 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
942 module_name, module_line, module_column, msgid);
945 gfc_fatal_error ("Module %s at line %d column %d: %s",
946 module_name, module_line, module_column, msgid);
952 /* Set the module's input pointer. */
955 set_module_locus (module_locus *m)
957 module_column = m->column;
958 module_line = m->line;
959 fsetpos (module_fp, &m->pos);
963 /* Get the module's input pointer so that we can restore it later. */
966 get_module_locus (module_locus *m)
968 m->column = module_column;
969 m->line = module_line;
970 fgetpos (module_fp, &m->pos);
974 /* Get the next character in the module, updating our reckoning of
982 c = getc (module_fp);
985 bad_module ("Unexpected EOF");
998 /* Parse a string constant. The delimiter is guaranteed to be a
1008 get_module_locus (&start);
1012 /* See how long the string is. */
1017 bad_module ("Unexpected end of module in string constant");
1035 set_module_locus (&start);
1037 atom_string = p = XCNEWVEC (char, len + 1);
1039 for (; len > 0; len--)
1043 module_char (); /* Guaranteed to be another \'. */
1047 module_char (); /* Terminating \'. */
1048 *p = '\0'; /* C-style string for debug purposes. */
1052 /* Parse a small integer. */
1055 parse_integer (int c)
1063 get_module_locus (&m);
1069 atom_int = 10 * atom_int + c - '0';
1070 if (atom_int > 99999999)
1071 bad_module ("Integer overflow");
1074 set_module_locus (&m);
1092 get_module_locus (&m);
1097 if (!ISALNUM (c) && c != '_' && c != '-')
1101 if (++len > GFC_MAX_SYMBOL_LEN)
1102 bad_module ("Name too long");
1107 fseek (module_fp, -1, SEEK_CUR);
1108 module_column = m.column + len - 1;
1115 /* Read the next atom in the module's input stream. */
1126 while (c == ' ' || c == '\r' || c == '\n');
1151 return ATOM_INTEGER;
1209 bad_module ("Bad name");
1216 /* Peek at the next atom on the input. */
1224 get_module_locus (&m);
1227 if (a == ATOM_STRING)
1230 set_module_locus (&m);
1235 /* Read the next atom from the input, requiring that it be a
1239 require_atom (atom_type type)
1245 get_module_locus (&m);
1253 p = _("Expected name");
1256 p = _("Expected left parenthesis");
1259 p = _("Expected right parenthesis");
1262 p = _("Expected integer");
1265 p = _("Expected string");
1268 gfc_internal_error ("require_atom(): bad atom type required");
1271 set_module_locus (&m);
1277 /* Given a pointer to an mstring array, require that the current input
1278 be one of the strings in the array. We return the enum value. */
1281 find_enum (const mstring *m)
1285 i = gfc_string2code (m, atom_name);
1289 bad_module ("find_enum(): Enum not found");
1295 /**************** Module output subroutines ***************************/
1297 /* Output a character to a module file. */
1300 write_char (char out)
1302 if (putc (out, module_fp) == EOF)
1303 gfc_fatal_error ("Error writing modules file: %s", xstrerror (errno));
1305 /* Add this to our MD5. */
1306 md5_process_bytes (&out, sizeof (out), &ctx);
1318 /* Write an atom to a module. The line wrapping isn't perfect, but it
1319 should work most of the time. This isn't that big of a deal, since
1320 the file really isn't meant to be read by people anyway. */
1323 write_atom (atom_type atom, const void *v)
1333 p = (const char *) v;
1345 i = *((const int *) v);
1347 gfc_internal_error ("write_atom(): Writing negative integer");
1349 sprintf (buffer, "%d", i);
1354 gfc_internal_error ("write_atom(): Trying to write dab atom");
1358 if(p == NULL || *p == '\0')
1363 if (atom != ATOM_RPAREN)
1365 if (module_column + len > 72)
1370 if (last_atom != ATOM_LPAREN && module_column != 1)
1375 if (atom == ATOM_STRING)
1378 while (p != NULL && *p)
1380 if (atom == ATOM_STRING && *p == '\'')
1385 if (atom == ATOM_STRING)
1393 /***************** Mid-level I/O subroutines *****************/
1395 /* These subroutines let their caller read or write atoms without
1396 caring about which of the two is actually happening. This lets a
1397 subroutine concentrate on the actual format of the data being
1400 static void mio_expr (gfc_expr **);
1401 pointer_info *mio_symbol_ref (gfc_symbol **);
1402 pointer_info *mio_interface_rest (gfc_interface **);
1403 static void mio_symtree_ref (gfc_symtree **);
1405 /* Read or write an enumerated value. On writing, we return the input
1406 value for the convenience of callers. We avoid using an integer
1407 pointer because enums are sometimes inside bitfields. */
1410 mio_name (int t, const mstring *m)
1412 if (iomode == IO_OUTPUT)
1413 write_atom (ATOM_NAME, gfc_code2string (m, t));
1416 require_atom (ATOM_NAME);
1423 /* Specialization of mio_name. */
1425 #define DECL_MIO_NAME(TYPE) \
1426 static inline TYPE \
1427 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1429 return (TYPE) mio_name ((int) t, m); \
1431 #define MIO_NAME(TYPE) mio_name_##TYPE
1436 if (iomode == IO_OUTPUT)
1437 write_atom (ATOM_LPAREN, NULL);
1439 require_atom (ATOM_LPAREN);
1446 if (iomode == IO_OUTPUT)
1447 write_atom (ATOM_RPAREN, NULL);
1449 require_atom (ATOM_RPAREN);
1454 mio_integer (int *ip)
1456 if (iomode == IO_OUTPUT)
1457 write_atom (ATOM_INTEGER, ip);
1460 require_atom (ATOM_INTEGER);
1466 /* Read or write a gfc_intrinsic_op value. */
1469 mio_intrinsic_op (gfc_intrinsic_op* op)
1471 /* FIXME: Would be nicer to do this via the operators symbolic name. */
1472 if (iomode == IO_OUTPUT)
1474 int converted = (int) *op;
1475 write_atom (ATOM_INTEGER, &converted);
1479 require_atom (ATOM_INTEGER);
1480 *op = (gfc_intrinsic_op) atom_int;
1485 /* Read or write a character pointer that points to a string on the heap. */
1488 mio_allocated_string (const char *s)
1490 if (iomode == IO_OUTPUT)
1492 write_atom (ATOM_STRING, s);
1497 require_atom (ATOM_STRING);
1503 /* Functions for quoting and unquoting strings. */
1506 quote_string (const gfc_char_t *s, const size_t slength)
1508 const gfc_char_t *p;
1512 /* Calculate the length we'll need: a backslash takes two ("\\"),
1513 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1514 for (p = s, i = 0; i < slength; p++, i++)
1518 else if (!gfc_wide_is_printable (*p))
1524 q = res = XCNEWVEC (char, len + 1);
1525 for (p = s, i = 0; i < slength; p++, i++)
1528 *q++ = '\\', *q++ = '\\';
1529 else if (!gfc_wide_is_printable (*p))
1531 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1532 (unsigned HOST_WIDE_INT) *p);
1536 *q++ = (unsigned char) *p;
1544 unquote_string (const char *s)
1550 for (p = s, len = 0; *p; p++, len++)
1557 else if (p[1] == 'U')
1558 p += 9; /* That is a "\U????????". */
1560 gfc_internal_error ("unquote_string(): got bad string");
1563 res = gfc_get_wide_string (len + 1);
1564 for (i = 0, p = s; i < len; i++, p++)
1569 res[i] = (unsigned char) *p;
1570 else if (p[1] == '\\')
1572 res[i] = (unsigned char) '\\';
1577 /* We read the 8-digits hexadecimal constant that follows. */
1582 gcc_assert (p[1] == 'U');
1583 for (j = 0; j < 8; j++)
1586 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1600 /* Read or write a character pointer that points to a wide string on the
1601 heap, performing quoting/unquoting of nonprintable characters using the
1602 form \U???????? (where each ? is a hexadecimal digit).
1603 Length is the length of the string, only known and used in output mode. */
1605 static const gfc_char_t *
1606 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1608 if (iomode == IO_OUTPUT)
1610 char *quoted = quote_string (s, length);
1611 write_atom (ATOM_STRING, quoted);
1617 gfc_char_t *unquoted;
1619 require_atom (ATOM_STRING);
1620 unquoted = unquote_string (atom_string);
1627 /* Read or write a string that is in static memory. */
1630 mio_pool_string (const char **stringp)
1632 /* TODO: one could write the string only once, and refer to it via a
1635 /* As a special case we have to deal with a NULL string. This
1636 happens for the 'module' member of 'gfc_symbol's that are not in a
1637 module. We read / write these as the empty string. */
1638 if (iomode == IO_OUTPUT)
1640 const char *p = *stringp == NULL ? "" : *stringp;
1641 write_atom (ATOM_STRING, p);
1645 require_atom (ATOM_STRING);
1646 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1652 /* Read or write a string that is inside of some already-allocated
1656 mio_internal_string (char *string)
1658 if (iomode == IO_OUTPUT)
1659 write_atom (ATOM_STRING, string);
1662 require_atom (ATOM_STRING);
1663 strcpy (string, atom_string);
1670 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1671 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1672 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1673 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1674 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE,
1675 AB_ALLOC_COMP, AB_POINTER_COMP, AB_PROC_POINTER_COMP, AB_PRIVATE_COMP,
1676 AB_VALUE, AB_VOLATILE, AB_PROTECTED,
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 mio_symbol_ref (&ts->interface);
2129 /* Add info for C interop and is_iso_c. */
2130 mio_integer (&ts->is_c_interop);
2131 mio_integer (&ts->is_iso_c);
2133 /* If the typespec is for an identifier either from iso_c_binding, or
2134 a constant that was initialized to an identifier from it, use the
2135 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2137 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2139 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2141 if (ts->type != BT_CHARACTER)
2143 /* ts->u.cl is only valid for BT_CHARACTER. */
2148 mio_charlen (&ts->u.cl);
2150 /* So as not to disturb the existing API, use an ATOM_NAME to
2151 transmit deferred characteristic for characters (F2003). */
2152 if (iomode == IO_OUTPUT)
2154 if (ts->type == BT_CHARACTER && ts->deferred)
2155 write_atom (ATOM_NAME, "DEFERRED_CL");
2157 else if (peek_atom () != ATOM_RPAREN)
2159 if (parse_atom () != ATOM_NAME)
2160 bad_module ("Expected string");
2168 static const mstring array_spec_types[] = {
2169 minit ("EXPLICIT", AS_EXPLICIT),
2170 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2171 minit ("DEFERRED", AS_DEFERRED),
2172 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2178 mio_array_spec (gfc_array_spec **asp)
2185 if (iomode == IO_OUTPUT)
2193 if (peek_atom () == ATOM_RPAREN)
2199 *asp = as = gfc_get_array_spec ();
2202 mio_integer (&as->rank);
2203 mio_integer (&as->corank);
2204 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2206 if (iomode == IO_INPUT && as->corank)
2207 as->cotype = (as->type == AS_DEFERRED) ? AS_DEFERRED : AS_EXPLICIT;
2209 for (i = 0; i < as->rank + as->corank; i++)
2211 mio_expr (&as->lower[i]);
2212 mio_expr (&as->upper[i]);
2220 /* Given a pointer to an array reference structure (which lives in a
2221 gfc_ref structure), find the corresponding array specification
2222 structure. Storing the pointer in the ref structure doesn't quite
2223 work when loading from a module. Generating code for an array
2224 reference also needs more information than just the array spec. */
2226 static const mstring array_ref_types[] = {
2227 minit ("FULL", AR_FULL),
2228 minit ("ELEMENT", AR_ELEMENT),
2229 minit ("SECTION", AR_SECTION),
2235 mio_array_ref (gfc_array_ref *ar)
2240 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2241 mio_integer (&ar->dimen);
2249 for (i = 0; i < ar->dimen; i++)
2250 mio_expr (&ar->start[i]);
2255 for (i = 0; i < ar->dimen; i++)
2257 mio_expr (&ar->start[i]);
2258 mio_expr (&ar->end[i]);
2259 mio_expr (&ar->stride[i]);
2265 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2268 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2269 we can't call mio_integer directly. Instead loop over each element
2270 and cast it to/from an integer. */
2271 if (iomode == IO_OUTPUT)
2273 for (i = 0; i < ar->dimen; i++)
2275 int tmp = (int)ar->dimen_type[i];
2276 write_atom (ATOM_INTEGER, &tmp);
2281 for (i = 0; i < ar->dimen; i++)
2283 require_atom (ATOM_INTEGER);
2284 ar->dimen_type[i] = (enum gfc_array_ref_dimen_type) atom_int;
2288 if (iomode == IO_INPUT)
2290 ar->where = gfc_current_locus;
2292 for (i = 0; i < ar->dimen; i++)
2293 ar->c_where[i] = gfc_current_locus;
2300 /* Saves or restores a pointer. The pointer is converted back and
2301 forth from an integer. We return the pointer_info pointer so that
2302 the caller can take additional action based on the pointer type. */
2304 static pointer_info *
2305 mio_pointer_ref (void *gp)
2309 if (iomode == IO_OUTPUT)
2311 p = get_pointer (*((char **) gp));
2312 write_atom (ATOM_INTEGER, &p->integer);
2316 require_atom (ATOM_INTEGER);
2317 p = add_fixup (atom_int, gp);
2324 /* Save and load references to components that occur within
2325 expressions. We have to describe these references by a number and
2326 by name. The number is necessary for forward references during
2327 reading, and the name is necessary if the symbol already exists in
2328 the namespace and is not loaded again. */
2331 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2333 char name[GFC_MAX_SYMBOL_LEN + 1];
2337 p = mio_pointer_ref (cp);
2338 if (p->type == P_UNKNOWN)
2339 p->type = P_COMPONENT;
2341 if (iomode == IO_OUTPUT)
2342 mio_pool_string (&(*cp)->name);
2345 mio_internal_string (name);
2347 if (sym && sym->attr.is_class)
2348 sym = sym->components->ts.u.derived;
2350 /* It can happen that a component reference can be read before the
2351 associated derived type symbol has been loaded. Return now and
2352 wait for a later iteration of load_needed. */
2356 if (sym->components != NULL && p->u.pointer == NULL)
2358 /* Symbol already loaded, so search by name. */
2359 q = gfc_find_component (sym, name, true, true);
2362 associate_integer_pointer (p, q);
2365 /* Make sure this symbol will eventually be loaded. */
2366 p = find_pointer2 (sym);
2367 if (p->u.rsym.state == UNUSED)
2368 p->u.rsym.state = NEEDED;
2373 static void mio_namespace_ref (gfc_namespace **nsp);
2374 static void mio_formal_arglist (gfc_formal_arglist **formal);
2375 static void mio_typebound_proc (gfc_typebound_proc** proc);
2378 mio_component (gfc_component *c, int vtype)
2382 gfc_formal_arglist *formal;
2386 if (iomode == IO_OUTPUT)
2388 p = get_pointer (c);
2389 mio_integer (&p->integer);
2394 p = get_integer (n);
2395 associate_integer_pointer (p, c);
2398 if (p->type == P_UNKNOWN)
2399 p->type = P_COMPONENT;
2401 mio_pool_string (&c->name);
2402 mio_typespec (&c->ts);
2403 mio_array_spec (&c->as);
2405 mio_symbol_attribute (&c->attr);
2406 if (c->ts.type == BT_CLASS)
2407 c->attr.class_ok = 1;
2408 c->attr.access = MIO_NAME (gfc_access) (c->attr.access, access_types);
2411 mio_expr (&c->initializer);
2413 if (c->attr.proc_pointer)
2415 if (iomode == IO_OUTPUT)
2418 while (formal && !formal->sym)
2419 formal = formal->next;
2422 mio_namespace_ref (&formal->sym->ns);
2424 mio_namespace_ref (&c->formal_ns);
2428 mio_namespace_ref (&c->formal_ns);
2429 /* TODO: if (c->formal_ns)
2431 c->formal_ns->proc_name = c;
2436 mio_formal_arglist (&c->formal);
2438 mio_typebound_proc (&c->tb);
2446 mio_component_list (gfc_component **cp, int vtype)
2448 gfc_component *c, *tail;
2452 if (iomode == IO_OUTPUT)
2454 for (c = *cp; c; c = c->next)
2455 mio_component (c, vtype);
2464 if (peek_atom () == ATOM_RPAREN)
2467 c = gfc_get_component ();
2468 mio_component (c, vtype);
2484 mio_actual_arg (gfc_actual_arglist *a)
2487 mio_pool_string (&a->name);
2488 mio_expr (&a->expr);
2494 mio_actual_arglist (gfc_actual_arglist **ap)
2496 gfc_actual_arglist *a, *tail;
2500 if (iomode == IO_OUTPUT)
2502 for (a = *ap; a; a = a->next)
2512 if (peek_atom () != ATOM_LPAREN)
2515 a = gfc_get_actual_arglist ();
2531 /* Read and write formal argument lists. */
2534 mio_formal_arglist (gfc_formal_arglist **formal)
2536 gfc_formal_arglist *f, *tail;
2540 if (iomode == IO_OUTPUT)
2542 for (f = *formal; f; f = f->next)
2543 mio_symbol_ref (&f->sym);
2547 *formal = tail = NULL;
2549 while (peek_atom () != ATOM_RPAREN)
2551 f = gfc_get_formal_arglist ();
2552 mio_symbol_ref (&f->sym);
2554 if (*formal == NULL)
2567 /* Save or restore a reference to a symbol node. */
2570 mio_symbol_ref (gfc_symbol **symp)
2574 p = mio_pointer_ref (symp);
2575 if (p->type == P_UNKNOWN)
2578 if (iomode == IO_OUTPUT)
2580 if (p->u.wsym.state == UNREFERENCED)
2581 p->u.wsym.state = NEEDS_WRITE;
2585 if (p->u.rsym.state == UNUSED)
2586 p->u.rsym.state = NEEDED;
2592 /* Save or restore a reference to a symtree node. */
2595 mio_symtree_ref (gfc_symtree **stp)
2600 if (iomode == IO_OUTPUT)
2601 mio_symbol_ref (&(*stp)->n.sym);
2604 require_atom (ATOM_INTEGER);
2605 p = get_integer (atom_int);
2607 /* An unused equivalence member; make a symbol and a symtree
2609 if (in_load_equiv && p->u.rsym.symtree == NULL)
2611 /* Since this is not used, it must have a unique name. */
2612 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2614 /* Make the symbol. */
2615 if (p->u.rsym.sym == NULL)
2617 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2619 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2622 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2623 p->u.rsym.symtree->n.sym->refs++;
2624 p->u.rsym.referenced = 1;
2626 /* If the symbol is PRIVATE and in COMMON, load_commons will
2627 generate a fixup symbol, which must be associated. */
2629 resolve_fixups (p->fixup, p->u.rsym.sym);
2633 if (p->type == P_UNKNOWN)
2636 if (p->u.rsym.state == UNUSED)
2637 p->u.rsym.state = NEEDED;
2639 if (p->u.rsym.symtree != NULL)
2641 *stp = p->u.rsym.symtree;
2645 f = XCNEW (fixup_t);
2647 f->next = p->u.rsym.stfixup;
2648 p->u.rsym.stfixup = f;
2650 f->pointer = (void **) stp;
2657 mio_iterator (gfc_iterator **ip)
2663 if (iomode == IO_OUTPUT)
2670 if (peek_atom () == ATOM_RPAREN)
2676 *ip = gfc_get_iterator ();
2681 mio_expr (&iter->var);
2682 mio_expr (&iter->start);
2683 mio_expr (&iter->end);
2684 mio_expr (&iter->step);
2692 mio_constructor (gfc_constructor_base *cp)
2698 if (iomode == IO_OUTPUT)
2700 for (c = gfc_constructor_first (*cp); c; c = gfc_constructor_next (c))
2703 mio_expr (&c->expr);
2704 mio_iterator (&c->iterator);
2710 while (peek_atom () != ATOM_RPAREN)
2712 c = gfc_constructor_append_expr (cp, NULL, NULL);
2715 mio_expr (&c->expr);
2716 mio_iterator (&c->iterator);
2725 static const mstring ref_types[] = {
2726 minit ("ARRAY", REF_ARRAY),
2727 minit ("COMPONENT", REF_COMPONENT),
2728 minit ("SUBSTRING", REF_SUBSTRING),
2734 mio_ref (gfc_ref **rp)
2741 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2746 mio_array_ref (&r->u.ar);
2750 mio_symbol_ref (&r->u.c.sym);
2751 mio_component_ref (&r->u.c.component, r->u.c.sym);
2755 mio_expr (&r->u.ss.start);
2756 mio_expr (&r->u.ss.end);
2757 mio_charlen (&r->u.ss.length);
2766 mio_ref_list (gfc_ref **rp)
2768 gfc_ref *ref, *head, *tail;
2772 if (iomode == IO_OUTPUT)
2774 for (ref = *rp; ref; ref = ref->next)
2781 while (peek_atom () != ATOM_RPAREN)
2784 head = tail = gfc_get_ref ();
2787 tail->next = gfc_get_ref ();
2801 /* Read and write an integer value. */
2804 mio_gmp_integer (mpz_t *integer)
2808 if (iomode == IO_INPUT)
2810 if (parse_atom () != ATOM_STRING)
2811 bad_module ("Expected integer string");
2813 mpz_init (*integer);
2814 if (mpz_set_str (*integer, atom_string, 10))
2815 bad_module ("Error converting integer");
2821 p = mpz_get_str (NULL, 10, *integer);
2822 write_atom (ATOM_STRING, p);
2829 mio_gmp_real (mpfr_t *real)
2834 if (iomode == IO_INPUT)
2836 if (parse_atom () != ATOM_STRING)
2837 bad_module ("Expected real string");
2840 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2845 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2847 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2849 write_atom (ATOM_STRING, p);
2854 atom_string = XCNEWVEC (char, strlen (p) + 20);
2856 sprintf (atom_string, "0.%s@%ld", p, exponent);
2858 /* Fix negative numbers. */
2859 if (atom_string[2] == '-')
2861 atom_string[0] = '-';
2862 atom_string[1] = '0';
2863 atom_string[2] = '.';
2866 write_atom (ATOM_STRING, atom_string);
2874 /* Save and restore the shape of an array constructor. */
2877 mio_shape (mpz_t **pshape, int rank)
2883 /* A NULL shape is represented by (). */
2886 if (iomode == IO_OUTPUT)
2898 if (t == ATOM_RPAREN)
2905 shape = gfc_get_shape (rank);
2909 for (n = 0; n < rank; n++)
2910 mio_gmp_integer (&shape[n]);
2916 static const mstring expr_types[] = {
2917 minit ("OP", EXPR_OP),
2918 minit ("FUNCTION", EXPR_FUNCTION),
2919 minit ("CONSTANT", EXPR_CONSTANT),
2920 minit ("VARIABLE", EXPR_VARIABLE),
2921 minit ("SUBSTRING", EXPR_SUBSTRING),
2922 minit ("STRUCTURE", EXPR_STRUCTURE),
2923 minit ("ARRAY", EXPR_ARRAY),
2924 minit ("NULL", EXPR_NULL),
2925 minit ("COMPCALL", EXPR_COMPCALL),
2929 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2930 generic operators, not in expressions. INTRINSIC_USER is also
2931 replaced by the correct function name by the time we see it. */
2933 static const mstring intrinsics[] =
2935 minit ("UPLUS", INTRINSIC_UPLUS),
2936 minit ("UMINUS", INTRINSIC_UMINUS),
2937 minit ("PLUS", INTRINSIC_PLUS),
2938 minit ("MINUS", INTRINSIC_MINUS),
2939 minit ("TIMES", INTRINSIC_TIMES),
2940 minit ("DIVIDE", INTRINSIC_DIVIDE),
2941 minit ("POWER", INTRINSIC_POWER),
2942 minit ("CONCAT", INTRINSIC_CONCAT),
2943 minit ("AND", INTRINSIC_AND),
2944 minit ("OR", INTRINSIC_OR),
2945 minit ("EQV", INTRINSIC_EQV),
2946 minit ("NEQV", INTRINSIC_NEQV),
2947 minit ("EQ_SIGN", INTRINSIC_EQ),
2948 minit ("EQ", INTRINSIC_EQ_OS),
2949 minit ("NE_SIGN", INTRINSIC_NE),
2950 minit ("NE", INTRINSIC_NE_OS),
2951 minit ("GT_SIGN", INTRINSIC_GT),
2952 minit ("GT", INTRINSIC_GT_OS),
2953 minit ("GE_SIGN", INTRINSIC_GE),
2954 minit ("GE", INTRINSIC_GE_OS),
2955 minit ("LT_SIGN", INTRINSIC_LT),
2956 minit ("LT", INTRINSIC_LT_OS),
2957 minit ("LE_SIGN", INTRINSIC_LE),
2958 minit ("LE", INTRINSIC_LE_OS),
2959 minit ("NOT", INTRINSIC_NOT),
2960 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2965 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2968 fix_mio_expr (gfc_expr *e)
2970 gfc_symtree *ns_st = NULL;
2973 if (iomode != IO_OUTPUT)
2978 /* If this is a symtree for a symbol that came from a contained module
2979 namespace, it has a unique name and we should look in the current
2980 namespace to see if the required, non-contained symbol is available
2981 yet. If so, the latter should be written. */
2982 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2983 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2984 e->symtree->n.sym->name);
2986 /* On the other hand, if the existing symbol is the module name or the
2987 new symbol is a dummy argument, do not do the promotion. */
2988 if (ns_st && ns_st->n.sym
2989 && ns_st->n.sym->attr.flavor != FL_MODULE
2990 && !e->symtree->n.sym->attr.dummy)
2993 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2997 /* In some circumstances, a function used in an initialization
2998 expression, in one use associated module, can fail to be
2999 coupled to its symtree when used in a specification
3000 expression in another module. */
3001 fname = e->value.function.esym ? e->value.function.esym->name
3002 : e->value.function.isym->name;
3003 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3008 /* This is probably a reference to a private procedure from another
3009 module. To prevent a segfault, make a generic with no specific
3010 instances. If this module is used, without the required
3011 specific coming from somewhere, the appropriate error message
3013 gfc_get_symbol (fname, gfc_current_ns, &sym);
3014 sym->attr.flavor = FL_PROCEDURE;
3015 sym->attr.generic = 1;
3016 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
3017 gfc_commit_symbol (sym);
3022 /* Read and write expressions. The form "()" is allowed to indicate a
3026 mio_expr (gfc_expr **ep)
3034 if (iomode == IO_OUTPUT)
3043 MIO_NAME (expr_t) (e->expr_type, expr_types);
3048 if (t == ATOM_RPAREN)
3055 bad_module ("Expected expression type");
3057 e = *ep = gfc_get_expr ();
3058 e->where = gfc_current_locus;
3059 e->expr_type = (expr_t) find_enum (expr_types);
3062 mio_typespec (&e->ts);
3063 mio_integer (&e->rank);
3067 switch (e->expr_type)
3071 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
3073 switch (e->value.op.op)
3075 case INTRINSIC_UPLUS:
3076 case INTRINSIC_UMINUS:
3078 case INTRINSIC_PARENTHESES:
3079 mio_expr (&e->value.op.op1);
3082 case INTRINSIC_PLUS:
3083 case INTRINSIC_MINUS:
3084 case INTRINSIC_TIMES:
3085 case INTRINSIC_DIVIDE:
3086 case INTRINSIC_POWER:
3087 case INTRINSIC_CONCAT:
3091 case INTRINSIC_NEQV:
3093 case INTRINSIC_EQ_OS:
3095 case INTRINSIC_NE_OS:
3097 case INTRINSIC_GT_OS:
3099 case INTRINSIC_GE_OS:
3101 case INTRINSIC_LT_OS:
3103 case INTRINSIC_LE_OS:
3104 mio_expr (&e->value.op.op1);
3105 mio_expr (&e->value.op.op2);
3109 bad_module ("Bad operator");
3115 mio_symtree_ref (&e->symtree);
3116 mio_actual_arglist (&e->value.function.actual);
3118 if (iomode == IO_OUTPUT)
3120 e->value.function.name
3121 = mio_allocated_string (e->value.function.name);
3122 flag = e->value.function.esym != NULL;
3123 mio_integer (&flag);
3125 mio_symbol_ref (&e->value.function.esym);
3127 write_atom (ATOM_STRING, e->value.function.isym->name);
3131 require_atom (ATOM_STRING);
3132 e->value.function.name = gfc_get_string (atom_string);
3135 mio_integer (&flag);
3137 mio_symbol_ref (&e->value.function.esym);
3140 require_atom (ATOM_STRING);
3141 e->value.function.isym = gfc_find_function (atom_string);
3149 mio_symtree_ref (&e->symtree);
3150 mio_ref_list (&e->ref);
3153 case EXPR_SUBSTRING:
3154 e->value.character.string
3155 = CONST_CAST (gfc_char_t *,
3156 mio_allocated_wide_string (e->value.character.string,
3157 e->value.character.length));
3158 mio_ref_list (&e->ref);
3161 case EXPR_STRUCTURE:
3163 mio_constructor (&e->value.constructor);
3164 mio_shape (&e->shape, e->rank);
3171 mio_gmp_integer (&e->value.integer);
3175 gfc_set_model_kind (e->ts.kind);
3176 mio_gmp_real (&e->value.real);
3180 gfc_set_model_kind (e->ts.kind);
3181 mio_gmp_real (&mpc_realref (e->value.complex));
3182 mio_gmp_real (&mpc_imagref (e->value.complex));
3186 mio_integer (&e->value.logical);
3190 mio_integer (&e->value.character.length);
3191 e->value.character.string
3192 = CONST_CAST (gfc_char_t *,
3193 mio_allocated_wide_string (e->value.character.string,
3194 e->value.character.length));
3198 bad_module ("Bad type in constant expression");
3216 /* Read and write namelists. */
3219 mio_namelist (gfc_symbol *sym)
3221 gfc_namelist *n, *m;
3222 const char *check_name;
3226 if (iomode == IO_OUTPUT)
3228 for (n = sym->namelist; n; n = n->next)
3229 mio_symbol_ref (&n->sym);
3233 /* This departure from the standard is flagged as an error.
3234 It does, in fact, work correctly. TODO: Allow it
3236 if (sym->attr.flavor == FL_NAMELIST)
3238 check_name = find_use_name (sym->name, false);
3239 if (check_name && strcmp (check_name, sym->name) != 0)
3240 gfc_error ("Namelist %s cannot be renamed by USE "
3241 "association to %s", sym->name, check_name);
3245 while (peek_atom () != ATOM_RPAREN)
3247 n = gfc_get_namelist ();
3248 mio_symbol_ref (&n->sym);
3250 if (sym->namelist == NULL)
3257 sym->namelist_tail = m;
3264 /* Save/restore lists of gfc_interface structures. When loading an
3265 interface, we are really appending to the existing list of
3266 interfaces. Checking for duplicate and ambiguous interfaces has to
3267 be done later when all symbols have been loaded. */
3270 mio_interface_rest (gfc_interface **ip)
3272 gfc_interface *tail, *p;
3273 pointer_info *pi = NULL;
3275 if (iomode == IO_OUTPUT)
3278 for (p = *ip; p; p = p->next)
3279 mio_symbol_ref (&p->sym);
3294 if (peek_atom () == ATOM_RPAREN)
3297 p = gfc_get_interface ();
3298 p->where = gfc_current_locus;
3299 pi = mio_symbol_ref (&p->sym);
3315 /* Save/restore a nameless operator interface. */
3318 mio_interface (gfc_interface **ip)
3321 mio_interface_rest (ip);
3325 /* Save/restore a named operator interface. */
3328 mio_symbol_interface (const char **name, const char **module,
3332 mio_pool_string (name);
3333 mio_pool_string (module);
3334 mio_interface_rest (ip);
3339 mio_namespace_ref (gfc_namespace **nsp)
3344 p = mio_pointer_ref (nsp);
3346 if (p->type == P_UNKNOWN)
3347 p->type = P_NAMESPACE;
3349 if (iomode == IO_INPUT && p->integer != 0)
3351 ns = (gfc_namespace *) p->u.pointer;
3354 ns = gfc_get_namespace (NULL, 0);
3355 associate_integer_pointer (p, ns);
3363 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3365 static gfc_namespace* current_f2k_derived;
3368 mio_typebound_proc (gfc_typebound_proc** proc)
3371 int overriding_flag;
3373 if (iomode == IO_INPUT)
3375 *proc = gfc_get_typebound_proc (NULL);
3376 (*proc)->where = gfc_current_locus;
3382 (*proc)->access = MIO_NAME (gfc_access) ((*proc)->access, access_types);
3384 /* IO the NON_OVERRIDABLE/DEFERRED combination. */
3385 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3386 overriding_flag = ((*proc)->deferred << 1) | (*proc)->non_overridable;
3387 overriding_flag = mio_name (overriding_flag, binding_overriding);
3388 (*proc)->deferred = ((overriding_flag & 2) != 0);
3389 (*proc)->non_overridable = ((overriding_flag & 1) != 0);
3390 gcc_assert (!((*proc)->deferred && (*proc)->non_overridable));
3392 (*proc)->nopass = mio_name ((*proc)->nopass, binding_passing);
3393 (*proc)->is_generic = mio_name ((*proc)->is_generic, binding_generic);
3394 (*proc)->ppc = mio_name((*proc)->ppc, binding_ppc);
3396 mio_pool_string (&((*proc)->pass_arg));
3398 flag = (int) (*proc)->pass_arg_num;
3399 mio_integer (&flag);
3400 (*proc)->pass_arg_num = (unsigned) flag;
3402 if ((*proc)->is_generic)
3408 if (iomode == IO_OUTPUT)
3409 for (g = (*proc)->u.generic; g; g = g->next)
3410 mio_allocated_string (g->specific_st->name);
3413 (*proc)->u.generic = NULL;
3414 while (peek_atom () != ATOM_RPAREN)
3416 gfc_symtree** sym_root;
3418 g = gfc_get_tbp_generic ();
3421 require_atom (ATOM_STRING);
3422 sym_root = ¤t_f2k_derived->tb_sym_root;
3423 g->specific_st = gfc_get_tbp_symtree (sym_root, atom_string);
3426 g->next = (*proc)->u.generic;
3427 (*proc)->u.generic = g;
3433 else if (!(*proc)->ppc)
3434 mio_symtree_ref (&(*proc)->u.specific);
3439 /* Walker-callback function for this purpose. */
3441 mio_typebound_symtree (gfc_symtree* st)
3443 if (iomode == IO_OUTPUT && !st->n.tb)
3446 if (iomode == IO_OUTPUT)
3449 mio_allocated_string (st->name);
3451 /* For IO_INPUT, the above is done in mio_f2k_derived. */
3453 mio_typebound_proc (&st->n.tb);
3457 /* IO a full symtree (in all depth). */
3459 mio_full_typebound_tree (gfc_symtree** root)
3463 if (iomode == IO_OUTPUT)
3464 gfc_traverse_symtree (*root, &mio_typebound_symtree);
3467 while (peek_atom () == ATOM_LPAREN)
3473 require_atom (ATOM_STRING);
3474 st = gfc_get_tbp_symtree (root, atom_string);
3477 mio_typebound_symtree (st);
3485 mio_finalizer (gfc_finalizer **f)
3487 if (iomode == IO_OUTPUT)
3490 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3491 mio_symtree_ref (&(*f)->proc_tree);
3495 *f = gfc_get_finalizer ();
3496 (*f)->where = gfc_current_locus; /* Value should not matter. */
3499 mio_symtree_ref (&(*f)->proc_tree);
3500 (*f)->proc_sym = NULL;
3505 mio_f2k_derived (gfc_namespace *f2k)
3507 current_f2k_derived = f2k;
3509 /* Handle the list of finalizer procedures. */
3511 if (iomode == IO_OUTPUT)
3514 for (f = f2k->finalizers; f; f = f->next)
3519 f2k->finalizers = NULL;
3520 while (peek_atom () != ATOM_RPAREN)
3522 gfc_finalizer *cur = NULL;
3523 mio_finalizer (&cur);
3524 cur->next = f2k->finalizers;
3525 f2k->finalizers = cur;
3530 /* Handle type-bound procedures. */
3531 mio_full_typebound_tree (&f2k->tb_sym_root);
3533 /* Type-bound user operators. */
3534 mio_full_typebound_tree (&f2k->tb_uop_root);
3536 /* Type-bound intrinsic operators. */
3538 if (iomode == IO_OUTPUT)
3541 for (op = GFC_INTRINSIC_BEGIN; op != GFC_INTRINSIC_END; ++op)
3543 gfc_intrinsic_op realop;
3545 if (op == INTRINSIC_USER || !f2k->tb_op[op])
3549 realop = (gfc_intrinsic_op) op;
3550 mio_intrinsic_op (&realop);
3551 mio_typebound_proc (&f2k->tb_op[op]);
3556 while (peek_atom () != ATOM_RPAREN)
3558 gfc_intrinsic_op op = GFC_INTRINSIC_BEGIN; /* Silence GCC. */
3561 mio_intrinsic_op (&op);
3562 mio_typebound_proc (&f2k->tb_op[op]);
3569 mio_full_f2k_derived (gfc_symbol *sym)
3573 if (iomode == IO_OUTPUT)
3575 if (sym->f2k_derived)
3576 mio_f2k_derived (sym->f2k_derived);
3580 if (peek_atom () != ATOM_RPAREN)
3582 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3583 mio_f2k_derived (sym->f2k_derived);
3586 gcc_assert (!sym->f2k_derived);
3593 /* Unlike most other routines, the address of the symbol node is already
3594 fixed on input and the name/module has already been filled in. */
3597 mio_symbol (gfc_symbol *sym)
3599 int intmod = INTMOD_NONE;
3603 mio_symbol_attribute (&sym->attr);
3604 mio_typespec (&sym->ts);
3606 if (iomode == IO_OUTPUT)
3607 mio_namespace_ref (&sym->formal_ns);
3610 mio_namespace_ref (&sym->formal_ns);
3613 sym->formal_ns->proc_name = sym;
3618 /* Save/restore common block links. */
3619 mio_symbol_ref (&sym->common_next);
3621 mio_formal_arglist (&sym->formal);
3623 if (sym->attr.flavor == FL_PARAMETER)
3624 mio_expr (&sym->value);
3626 mio_array_spec (&sym->as);
3628 mio_symbol_ref (&sym->result);
3630 if (sym->attr.cray_pointee)
3631 mio_symbol_ref (&sym->cp_pointer);
3633 /* Note that components are always saved, even if they are supposed
3634 to be private. Component access is checked during searching. */
3636 mio_component_list (&sym->components, sym->attr.vtype);
3638 if (sym->components != NULL)
3639 sym->component_access
3640 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3642 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3643 mio_full_f2k_derived (sym);
3647 /* Add the fields that say whether this is from an intrinsic module,
3648 and if so, what symbol it is within the module. */
3649 /* mio_integer (&(sym->from_intmod)); */
3650 if (iomode == IO_OUTPUT)
3652 intmod = sym->from_intmod;
3653 mio_integer (&intmod);
3657 mio_integer (&intmod);
3658 sym->from_intmod = (intmod_id) intmod;
3661 mio_integer (&(sym->intmod_sym_id));
3663 if (sym->attr.flavor == FL_DERIVED)
3664 mio_integer (&(sym->hash_value));
3670 /************************* Top level subroutines *************************/
3672 /* Given a root symtree node and a symbol, try to find a symtree that
3673 references the symbol that is not a unique name. */
3675 static gfc_symtree *
3676 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3678 gfc_symtree *s = NULL;
3683 s = find_symtree_for_symbol (st->right, sym);
3686 s = find_symtree_for_symbol (st->left, sym);
3690 if (st->n.sym == sym && !check_unique_name (st->name))
3697 /* A recursive function to look for a specific symbol by name and by
3698 module. Whilst several symtrees might point to one symbol, its
3699 is sufficient for the purposes here than one exist. Note that
3700 generic interfaces are distinguished as are symbols that have been
3701 renamed in another module. */
3702 static gfc_symtree *
3703 find_symbol (gfc_symtree *st, const char *name,
3704 const char *module, int generic)
3707 gfc_symtree *retval, *s;
3709 if (st == NULL || st->n.sym == NULL)
3712 c = strcmp (name, st->n.sym->name);
3713 if (c == 0 && st->n.sym->module
3714 && strcmp (module, st->n.sym->module) == 0
3715 && !check_unique_name (st->name))
3717 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3719 /* Detect symbols that are renamed by use association in another
3720 module by the absence of a symtree and null attr.use_rename,
3721 since the latter is not transmitted in the module file. */
3722 if (((!generic && !st->n.sym->attr.generic)
3723 || (generic && st->n.sym->attr.generic))
3724 && !(s == NULL && !st->n.sym->attr.use_rename))
3728 retval = find_symbol (st->left, name, module, generic);
3731 retval = find_symbol (st->right, name, module, generic);
3737 /* Skip a list between balanced left and right parens. */
3747 switch (parse_atom ())
3770 /* Load operator interfaces from the module. Interfaces are unusual
3771 in that they attach themselves to existing symbols. */
3774 load_operator_interfaces (void)
3777 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3779 pointer_info *pi = NULL;
3784 while (peek_atom () != ATOM_RPAREN)
3788 mio_internal_string (name);
3789 mio_internal_string (module);
3791 n = number_use_names (name, true);
3794 for (i = 1; i <= n; i++)
3796 /* Decide if we need to load this one or not. */
3797 p = find_use_name_n (name, &i, true);
3801 while (parse_atom () != ATOM_RPAREN);
3807 uop = gfc_get_uop (p);
3808 pi = mio_interface_rest (&uop->op);
3812 if (gfc_find_uop (p, NULL))
3814 uop = gfc_get_uop (p);
3815 uop->op = gfc_get_interface ();
3816 uop->op->where = gfc_current_locus;
3817 add_fixup (pi->integer, &uop->op->sym);
3826 /* Load interfaces from the module. Interfaces are unusual in that
3827 they attach themselves to existing symbols. */
3830 load_generic_interfaces (void)
3833 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3835 gfc_interface *generic = NULL, *gen = NULL;
3837 bool ambiguous_set = false;
3841 while (peek_atom () != ATOM_RPAREN)
3845 mio_internal_string (name);
3846 mio_internal_string (module);
3848 n = number_use_names (name, false);
3849 renamed = n ? 1 : 0;
3852 for (i = 1; i <= n; i++)
3855 /* Decide if we need to load this one or not. */
3856 p = find_use_name_n (name, &i, false);
3858 st = find_symbol (gfc_current_ns->sym_root,
3859 name, module_name, 1);
3861 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3863 /* Skip the specific names for these cases. */
3864 while (i == 1 && parse_atom () != ATOM_RPAREN);
3869 /* If the symbol exists already and is being USEd without being
3870 in an ONLY clause, do not load a new symtree(11.3.2). */
3871 if (!only_flag && st)
3876 /* Make the symbol inaccessible if it has been added by a USE
3877 statement without an ONLY(11.3.2). */
3879 && !st->n.sym->attr.use_only
3880 && !st->n.sym->attr.use_rename
3881 && strcmp (st->n.sym->module, module_name) == 0)
3884 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3885 st = gfc_get_unique_symtree (gfc_current_ns);
3892 if (strcmp (st->name, p) != 0)
3894 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3900 /* Since we haven't found a valid generic interface, we had
3904 gfc_get_symbol (p, NULL, &sym);
3905 sym->name = gfc_get_string (name);
3906 sym->module = gfc_get_string (module_name);
3907 sym->attr.flavor = FL_PROCEDURE;
3908 sym->attr.generic = 1;
3909 sym->attr.use_assoc = 1;
3914 /* Unless sym is a generic interface, this reference
3917 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3921 if (st && !sym->attr.generic
3924 && strcmp(module, sym->module))
3926 ambiguous_set = true;
3931 sym->attr.use_only = only_flag;
3932 sym->attr.use_rename = renamed;
3936 mio_interface_rest (&sym->generic);
3937 generic = sym->generic;
3939 else if (!sym->generic)
3941 sym->generic = generic;
3942 sym->attr.generic_copy = 1;
3945 /* If a procedure that is not generic has generic interfaces
3946 that include itself, it is generic! We need to take care
3947 to retain symbols ambiguous that were already so. */
3948 if (sym->attr.use_assoc
3949 && !sym->attr.generic
3950 && sym->attr.flavor == FL_PROCEDURE)
3952 for (gen = generic; gen; gen = gen->next)
3954 if (gen->sym == sym)
3956 sym->attr.generic = 1;
3971 /* Load common blocks. */
3976 char name[GFC_MAX_SYMBOL_LEN + 1];
3981 while (peek_atom () != ATOM_RPAREN)
3985 mio_internal_string (name);
3987 p = gfc_get_common (name, 1);
3989 mio_symbol_ref (&p->head);
3990 mio_integer (&flags);
3994 p->threadprivate = 1;
3997 /* Get whether this was a bind(c) common or not. */
3998 mio_integer (&p->is_bind_c);
3999 /* Get the binding label. */
4000 mio_internal_string (p->binding_label);
4009 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
4010 so that unused variables are not loaded and so that the expression can
4016 gfc_equiv *head, *tail, *end, *eq;
4020 in_load_equiv = true;
4022 end = gfc_current_ns->equiv;
4023 while (end != NULL && end->next != NULL)
4026 while (peek_atom () != ATOM_RPAREN) {
4030 while(peek_atom () != ATOM_RPAREN)
4033 head = tail = gfc_get_equiv ();
4036 tail->eq = gfc_get_equiv ();
4040 mio_pool_string (&tail->module);
4041 mio_expr (&tail->expr);
4044 /* Unused equivalence members have a unique name. In addition, it
4045 must be checked that the symbols are from the same module. */
4047 for (eq = head; eq; eq = eq->eq)
4049 if (eq->expr->symtree->n.sym->module
4050 && head->expr->symtree->n.sym->module
4051 && strcmp (head->expr->symtree->n.sym->module,
4052 eq->expr->symtree->n.sym->module) == 0
4053 && !check_unique_name (eq->expr->symtree->name))
4062 for (eq = head; eq; eq = head)
4065 gfc_free_expr (eq->expr);
4071 gfc_current_ns->equiv = head;
4082 in_load_equiv = false;
4086 /* This function loads the sym_root of f2k_derived with the extensions to
4087 the derived type. */
4089 load_derived_extensions (void)
4092 gfc_symbol *derived;
4096 char name[GFC_MAX_SYMBOL_LEN + 1];
4097 char module[GFC_MAX_SYMBOL_LEN + 1];
4101 while (peek_atom () != ATOM_RPAREN)
4104 mio_integer (&symbol);
4105 info = get_integer (symbol);
4106 derived = info->u.rsym.sym;
4108 /* This one is not being loaded. */
4109 if (!info || !derived)
4111 while (peek_atom () != ATOM_RPAREN)
4116 gcc_assert (derived->attr.flavor == FL_DERIVED);
4117 if (derived->f2k_derived == NULL)
4118 derived->f2k_derived = gfc_get_namespace (NULL, 0);
4120 while (peek_atom () != ATOM_RPAREN)
4123 mio_internal_string (name);
4124 mio_internal_string (module);
4126 /* Only use one use name to find the symbol. */
4128 p = find_use_name_n (name, &j, false);
4131 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4133 st = gfc_find_symtree (derived->f2k_derived->sym_root, name);
4136 /* Only use the real name in f2k_derived to ensure a single
4138 st = gfc_new_symtree (&derived->f2k_derived->sym_root, name);
4151 /* Recursive function to traverse the pointer_info tree and load a
4152 needed symbol. We return nonzero if we load a symbol and stop the
4153 traversal, because the act of loading can alter the tree. */
4156 load_needed (pointer_info *p)
4167 rv |= load_needed (p->left);
4168 rv |= load_needed (p->right);
4170 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
4173 p->u.rsym.state = USED;
4175 set_module_locus (&p->u.rsym.where);
4177 sym = p->u.rsym.sym;
4180 q = get_integer (p->u.rsym.ns);
4182 ns = (gfc_namespace *) q->u.pointer;
4185 /* Create an interface namespace if necessary. These are
4186 the namespaces that hold the formal parameters of module
4189 ns = gfc_get_namespace (NULL, 0);
4190 associate_integer_pointer (q, ns);
4193 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
4194 doesn't go pear-shaped if the symbol is used. */
4196 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
4199 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
4200 sym->module = gfc_get_string (p->u.rsym.module);
4201 strcpy (sym->binding_label, p->u.rsym.binding_label);
4203 associate_integer_pointer (p, sym);
4207 sym->attr.use_assoc = 1;
4209 sym->attr.use_only = 1;
4210 if (p->u.rsym.renamed)
4211 sym->attr.use_rename = 1;
4217 /* Recursive function for cleaning up things after a module has been read. */
4220 read_cleanup (pointer_info *p)
4228 read_cleanup (p->left);
4229 read_cleanup (p->right);
4231 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
4234 /* Add hidden symbols to the symtree. */
4235 q = get_integer (p->u.rsym.ns);
4236 ns = (gfc_namespace *) q->u.pointer;
4238 if (!p->u.rsym.sym->attr.vtype
4239 && !p->u.rsym.sym->attr.vtab)
4240 st = gfc_get_unique_symtree (ns);
4243 /* There is no reason to use 'unique_symtrees' for vtabs or
4244 vtypes - their name is fine for a symtree and reduces the
4245 namespace pollution. */
4246 st = gfc_find_symtree (ns->sym_root, p->u.rsym.sym->name);
4248 st = gfc_new_symtree (&ns->sym_root, p->u.rsym.sym->name);
4251 st->n.sym = p->u.rsym.sym;
4254 /* Fixup any symtree references. */
4255 p->u.rsym.symtree = st;
4256 resolve_fixups (p->u.rsym.stfixup, st);
4257 p->u.rsym.stfixup = NULL;
4260 /* Free unused symbols. */
4261 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
4262 gfc_free_symbol (p->u.rsym.sym);
4266 /* It is not quite enough to check for ambiguity in the symbols by
4267 the loaded symbol and the new symbol not being identical. */
4269 check_for_ambiguous (gfc_symbol *st_sym, pointer_info *info)
4273 symbol_attribute attr;
4275 rsym = info->u.rsym.sym;
4279 if (st_sym->attr.vtab || st_sym->attr.vtype)
4282 /* If the existing symbol is generic from a different module and
4283 the new symbol is generic there can be no ambiguity. */
4284 if (st_sym->attr.generic
4286 && strcmp (st_sym->module, module_name))
4288 /* The new symbol's attributes have not yet been read. Since
4289 we need attr.generic, read it directly. */
4290 get_module_locus (&locus);
4291 set_module_locus (&info->u.rsym.where);
4294 mio_symbol_attribute (&attr);
4295 set_module_locus (&locus);
4304 /* Read a module file. */
4309 module_locus operator_interfaces, user_operators, extensions;
4311 char name[GFC_MAX_SYMBOL_LEN + 1];
4313 int ambiguous, j, nuse, symbol;
4314 pointer_info *info, *q;
4319 get_module_locus (&operator_interfaces); /* Skip these for now. */
4322 get_module_locus (&user_operators);
4326 /* Skip commons, equivalences and derived type extensions for now. */
4330 get_module_locus (&extensions);
4335 /* Create the fixup nodes for all the symbols. */
4337 while (peek_atom () != ATOM_RPAREN)
4339 require_atom (ATOM_INTEGER);
4340 info = get_integer (atom_int);
4342 info->type = P_SYMBOL;
4343 info->u.rsym.state = UNUSED;
4345 mio_internal_string (info->u.rsym.true_name);
4346 mio_internal_string (info->u.rsym.module);
4347 mio_internal_string (info->u.rsym.binding_label);
4350 require_atom (ATOM_INTEGER);
4351 info->u.rsym.ns = atom_int;
4353 get_module_locus (&info->u.rsym.where);
4356 /* See if the symbol has already been loaded by a previous module.
4357 If so, we reference the existing symbol and prevent it from
4358 being loaded again. This should not happen if the symbol being
4359 read is an index for an assumed shape dummy array (ns != 1). */
4361 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
4364 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
4367 info->u.rsym.state = USED;
4368 info->u.rsym.sym = sym;
4370 /* Some symbols do not have a namespace (eg. formal arguments),
4371 so the automatic "unique symtree" mechanism must be suppressed
4372 by marking them as referenced. */
4373 q = get_integer (info->u.rsym.ns);
4374 if (q->u.pointer == NULL)
4376 info->u.rsym.referenced = 1;
4380 /* If possible recycle the symtree that references the symbol.
4381 If a symtree is not found and the module does not import one,
4382 a unique-name symtree is found by read_cleanup. */
4383 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
4386 info->u.rsym.symtree = st;
4387 info->u.rsym.referenced = 1;
4393 /* Parse the symtree lists. This lets us mark which symbols need to
4394 be loaded. Renaming is also done at this point by replacing the
4399 while (peek_atom () != ATOM_RPAREN)
4401 mio_internal_string (name);
4402 mio_integer (&ambiguous);
4403 mio_integer (&symbol);
4405 info = get_integer (symbol);
4407 /* See how many use names there are. If none, go through the start
4408 of the loop at least once. */
4409 nuse = number_use_names (name, false);
4410 info->u.rsym.renamed = nuse ? 1 : 0;
4415 for (j = 1; j <= nuse; j++)
4417 /* Get the jth local name for this symbol. */
4418 p = find_use_name_n (name, &j, false);
4420 if (p == NULL && strcmp (name, module_name) == 0)
4423 /* Exception: Always import vtabs & vtypes. */
4424 if (p == NULL && (strncmp (name, "__vtab_", 5) == 0
4425 || strncmp (name, "__vtype_", 6) == 0))
4428 /* Skip symtree nodes not in an ONLY clause, unless there
4429 is an existing symtree loaded from another USE statement. */
4432 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4434 info->u.rsym.symtree = st;
4438 /* If a symbol of the same name and module exists already,
4439 this symbol, which is not in an ONLY clause, must not be
4440 added to the namespace(11.3.2). Note that find_symbol
4441 only returns the first occurrence that it finds. */
4442 if (!only_flag && !info->u.rsym.renamed
4443 && strcmp (name, module_name) != 0
4444 && find_symbol (gfc_current_ns->sym_root, name,
4448 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
4452 /* Check for ambiguous symbols. */
4453 if (check_for_ambiguous (st->n.sym, info))
4455 info->u.rsym.symtree = st;
4459 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
4461 /* Delete the symtree if the symbol has been added by a USE
4462 statement without an ONLY(11.3.2). Remember that the rsym
4463 will be the same as the symbol found in the symtree, for
4465 if (st && (only_flag || info->u.rsym.renamed)
4466 && !st->n.sym->attr.use_only
4467 && !st->n.sym->attr.use_rename
4468 && info->u.rsym.sym == st->n.sym)
4469 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
4471 /* Create a symtree node in the current namespace for this
4473 st = check_unique_name (p)
4474 ? gfc_get_unique_symtree (gfc_current_ns)
4475 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
4476 st->ambiguous = ambiguous;
4478 sym = info->u.rsym.sym;
4480 /* Create a symbol node if it doesn't already exist. */
4483 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
4485 sym = info->u.rsym.sym;
4486 sym->module = gfc_get_string (info->u.rsym.module);
4488 /* TODO: hmm, can we test this? Do we know it will be
4489 initialized to zeros? */
4490 if (info->u.rsym.binding_label[0] != '\0')
4491 strcpy (sym->binding_label, info->u.rsym.binding_label);
4497 if (strcmp (name, p) != 0)
4498 sym->attr.use_rename = 1;
4500 /* We need to set the only_flag here so that symbols from the
4501 same USE...ONLY but earlier are not deleted from the tree in
4502 the gfc_delete_symtree above. */
4503 sym->attr.use_only = only_flag;
4505 /* Store the symtree pointing to this symbol. */
4506 info->u.rsym.symtree = st;
4508 if (info->u.rsym.state == UNUSED)
4509 info->u.rsym.state = NEEDED;
4510 info->u.rsym.referenced = 1;
4517 /* Load intrinsic operator interfaces. */
4518 set_module_locus (&operator_interfaces);
4521 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4523 if (i == INTRINSIC_USER)
4528 u = find_use_operator ((gfc_intrinsic_op) i);
4539 mio_interface (&gfc_current_ns->op[i]);
4544 /* Load generic and user operator interfaces. These must follow the
4545 loading of symtree because otherwise symbols can be marked as
4548 set_module_locus (&user_operators);
4550 load_operator_interfaces ();
4551 load_generic_interfaces ();
4556 /* At this point, we read those symbols that are needed but haven't
4557 been loaded yet. If one symbol requires another, the other gets
4558 marked as NEEDED if its previous state was UNUSED. */
4560 while (load_needed (pi_root));
4562 /* Make sure all elements of the rename-list were found in the module. */
4564 for (u = gfc_rename_list; u; u = u->next)
4569 if (u->op == INTRINSIC_NONE)
4571 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4572 u->use_name, &u->where, module_name);
4576 if (u->op == INTRINSIC_USER)
4578 gfc_error ("User operator '%s' referenced at %L not found "
4579 "in module '%s'", u->use_name, &u->where, module_name);
4583 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4584 "in module '%s'", gfc_op2string (u->op), &u->where,
4588 /* Now we should be in a position to fill f2k_derived with derived type
4589 extensions, since everything has been loaded. */
4590 set_module_locus (&extensions);
4591 load_derived_extensions ();
4593 /* Clean up symbol nodes that were never loaded, create references
4594 to hidden symbols. */
4596 read_cleanup (pi_root);
4600 /* Given an access type that is specific to an entity and the default
4601 access, return nonzero if the entity is publicly accessible. If the
4602 element is declared as PUBLIC, then it is public; if declared
4603 PRIVATE, then private, and otherwise it is public unless the default
4604 access in this context has been declared PRIVATE. */
4607 check_access (gfc_access specific_access, gfc_access default_access)
4609 if (specific_access == ACCESS_PUBLIC)
4611 if (specific_access == ACCESS_PRIVATE)
4614 if (gfc_option.flag_module_private)
4615 return default_access == ACCESS_PUBLIC;
4617 return default_access != ACCESS_PRIVATE;
4622 gfc_check_symbol_access (gfc_symbol *sym)
4624 if (sym->attr.vtab || sym->attr.vtype)
4627 return check_access (sym->attr.access, sym->ns->default_access);
4631 /* A structure to remember which commons we've already written. */
4633 struct written_common
4635 BBT_HEADER(written_common);
4636 const char *name, *label;
4639 static struct written_common *written_commons = NULL;
4641 /* Comparison function used for balancing the binary tree. */
4644 compare_written_commons (void *a1, void *b1)
4646 const char *aname = ((struct written_common *) a1)->name;
4647 const char *alabel = ((struct written_common *) a1)->label;
4648 const char *bname = ((struct written_common *) b1)->name;
4649 const char *blabel = ((struct written_common *) b1)->label;
4650 int c = strcmp (aname, bname);
4652 return (c != 0 ? c : strcmp (alabel, blabel));
4655 /* Free a list of written commons. */
4658 free_written_common (struct written_common *w)
4664 free_written_common (w->left);
4666 free_written_common (w->right);
4671 /* Write a common block to the module -- recursive helper function. */
4674 write_common_0 (gfc_symtree *st, bool this_module)
4680 struct written_common *w;
4681 bool write_me = true;
4686 write_common_0 (st->left, this_module);
4688 /* We will write out the binding label, or the name if no label given. */
4689 name = st->n.common->name;
4691 label = p->is_bind_c ? p->binding_label : p->name;
4693 /* Check if we've already output this common. */
4694 w = written_commons;
4697 int c = strcmp (name, w->name);
4698 c = (c != 0 ? c : strcmp (label, w->label));
4702 w = (c < 0) ? w->left : w->right;
4705 if (this_module && p->use_assoc)
4710 /* Write the common to the module. */
4712 mio_pool_string (&name);
4714 mio_symbol_ref (&p->head);
4715 flags = p->saved ? 1 : 0;
4716 if (p->threadprivate)
4718 mio_integer (&flags);
4720 /* Write out whether the common block is bind(c) or not. */
4721 mio_integer (&(p->is_bind_c));
4723 mio_pool_string (&label);
4726 /* Record that we have written this common. */
4727 w = XCNEW (struct written_common);
4730 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4733 write_common_0 (st->right, this_module);
4737 /* Write a common, by initializing the list of written commons, calling
4738 the recursive function write_common_0() and cleaning up afterwards. */
4741 write_common (gfc_symtree *st)
4743 written_commons = NULL;
4744 write_common_0 (st, true);
4745 write_common_0 (st, false);
4746 free_written_common (written_commons);
4747 written_commons = NULL;
4751 /* Write the blank common block to the module. */
4754 write_blank_common (void)
4756 const char * name = BLANK_COMMON_NAME;
4758 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4759 this, but it hasn't been checked. Just making it so for now. */
4762 if (gfc_current_ns->blank_common.head == NULL)
4767 mio_pool_string (&name);
4769 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4770 saved = gfc_current_ns->blank_common.saved;
4771 mio_integer (&saved);
4773 /* Write out whether the common block is bind(c) or not. */
4774 mio_integer (&is_bind_c);
4776 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4777 it doesn't matter because the label isn't used. */
4778 mio_pool_string (&name);
4784 /* Write equivalences to the module. */
4793 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4797 for (e = eq; e; e = e->eq)
4799 if (e->module == NULL)
4800 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4801 mio_allocated_string (e->module);
4802 mio_expr (&e->expr);
4811 /* Write derived type extensions to the module. */
4814 write_dt_extensions (gfc_symtree *st)
4816 if (!gfc_check_symbol_access (st->n.sym))
4818 if (!(st->n.sym->ns && st->n.sym->ns->proc_name
4819 && st->n.sym->ns->proc_name->attr.flavor == FL_MODULE))
4823 mio_pool_string (&st->n.sym->name);
4824 if (st->n.sym->module != NULL)
4825 mio_pool_string (&st->n.sym->module);
4827 mio_internal_string (module_name);
4832 write_derived_extensions (gfc_symtree *st)
4834 if (!((st->n.sym->attr.flavor == FL_DERIVED)
4835 && (st->n.sym->f2k_derived != NULL)
4836 && (st->n.sym->f2k_derived->sym_root != NULL)))
4840 mio_symbol_ref (&(st->n.sym));
4841 gfc_traverse_symtree (st->n.sym->f2k_derived->sym_root,
4842 write_dt_extensions);
4847 /* Write a symbol to the module. */
4850 write_symbol (int n, gfc_symbol *sym)
4854 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4855 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4858 mio_pool_string (&sym->name);
4860 mio_pool_string (&sym->module);
4861 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4863 label = sym->binding_label;
4864 mio_pool_string (&label);
4867 mio_pool_string (&sym->name);
4869 mio_pointer_ref (&sym->ns);
4876 /* Recursive traversal function to write the initial set of symbols to
4877 the module. We check to see if the symbol should be written
4878 according to the access specification. */
4881 write_symbol0 (gfc_symtree *st)
4885 bool dont_write = false;
4890 write_symbol0 (st->left);
4893 if (sym->module == NULL)
4894 sym->module = gfc_get_string (module_name);
4896 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4897 && !sym->attr.subroutine && !sym->attr.function)
4900 if (!gfc_check_symbol_access (sym))
4905 p = get_pointer (sym);
4906 if (p->type == P_UNKNOWN)
4909 if (p->u.wsym.state != WRITTEN)
4911 write_symbol (p->integer, sym);
4912 p->u.wsym.state = WRITTEN;
4916 write_symbol0 (st->right);
4920 /* Recursive traversal function to write the secondary set of symbols
4921 to the module file. These are symbols that were not public yet are
4922 needed by the public symbols or another dependent symbol. The act
4923 of writing a symbol can modify the pointer_info tree, so we cease
4924 traversal if we find a symbol to write. We return nonzero if a
4925 symbol was written and pass that information upwards. */
4928 write_symbol1 (pointer_info *p)
4935 result = write_symbol1 (p->left);
4937 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4939 p->u.wsym.state = WRITTEN;
4940 write_symbol (p->integer, p->u.wsym.sym);
4944 result |= write_symbol1 (p->right);
4949 /* Write operator interfaces associated with a symbol. */
4952 write_operator (gfc_user_op *uop)
4954 static char nullstring[] = "";
4955 const char *p = nullstring;
4957 if (uop->op == NULL || !check_access (uop->access, uop->ns->default_access))
4960 mio_symbol_interface (&uop->name, &p, &uop->op);
4964 /* Write generic interfaces from the namespace sym_root. */
4967 write_generic (gfc_symtree *st)
4974 write_generic (st->left);
4975 write_generic (st->right);
4978 if (!sym || check_unique_name (st->name))
4981 if (sym->generic == NULL || !gfc_check_symbol_access (sym))
4984 if (sym->module == NULL)
4985 sym->module = gfc_get_string (module_name);
4987 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4992 write_symtree (gfc_symtree *st)
4999 /* A symbol in an interface body must not be visible in the
5001 if (sym->ns != gfc_current_ns
5002 && sym->ns->proc_name
5003 && sym->ns->proc_name->attr.if_source == IFSRC_IFBODY)
5006 if (!gfc_check_symbol_access (sym)
5007 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
5008 && !sym->attr.subroutine && !sym->attr.function))
5011 if (check_unique_name (st->name))
5014 p = find_pointer (sym);
5016 gfc_internal_error ("write_symtree(): Symbol not written");
5018 mio_pool_string (&st->name);
5019 mio_integer (&st->ambiguous);
5020 mio_integer (&p->integer);
5029 /* Write the operator interfaces. */
5032 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
5034 if (i == INTRINSIC_USER)
5037 mio_interface (check_access (gfc_current_ns->operator_access[i],
5038 gfc_current_ns->default_access)
5039 ? &gfc_current_ns->op[i] : NULL);
5047 gfc_traverse_user_op (gfc_current_ns, write_operator);
5053 write_generic (gfc_current_ns->sym_root);
5059 write_blank_common ();
5060 write_common (gfc_current_ns->common_root);
5072 gfc_traverse_symtree (gfc_current_ns->sym_root,
5073 write_derived_extensions);
5078 /* Write symbol information. First we traverse all symbols in the
5079 primary namespace, writing those that need to be written.
5080 Sometimes writing one symbol will cause another to need to be
5081 written. A list of these symbols ends up on the write stack, and
5082 we end by popping the bottom of the stack and writing the symbol
5083 until the stack is empty. */
5087 write_symbol0 (gfc_current_ns->sym_root);
5088 while (write_symbol1 (pi_root))
5097 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
5102 /* Read a MD5 sum from the header of a module file. If the file cannot
5103 be opened, or we have any other error, we return -1. */
5106 read_md5_from_module_file (const char * filename, unsigned char md5[16])
5112 /* Open the file. */
5113 if ((file = fopen (filename, "r")) == NULL)
5116 /* Read the first line. */
5117 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5123 /* The file also needs to be overwritten if the version number changed. */
5124 n = strlen ("GFORTRAN module version '" MOD_VERSION "' created");
5125 if (strncmp (buf, "GFORTRAN module version '" MOD_VERSION "' created", n) != 0)
5131 /* Read a second line. */
5132 if (fgets (buf, sizeof (buf) - 1, file) == NULL)
5138 /* Close the file. */
5141 /* If the header is not what we expect, or is too short, bail out. */
5142 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
5145 /* Now, we have a real MD5, read it into the array. */
5146 for (n = 0; n < 16; n++)
5150 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
5160 /* Given module, dump it to disk. If there was an error while
5161 processing the module, dump_flag will be set to zero and we delete
5162 the module file, even if it was already there. */
5165 gfc_dump_module (const char *name, int dump_flag)
5168 char *filename, *filename_tmp, *p;
5171 unsigned char md5_new[16], md5_old[16];
5173 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
5174 if (gfc_option.module_dir != NULL)
5176 n += strlen (gfc_option.module_dir);
5177 filename = (char *) alloca (n);
5178 strcpy (filename, gfc_option.module_dir);
5179 strcat (filename, name);
5183 filename = (char *) alloca (n);
5184 strcpy (filename, name);
5186 strcat (filename, MODULE_EXTENSION);
5188 /* Name of the temporary file used to write the module. */
5189 filename_tmp = (char *) alloca (n + 1);
5190 strcpy (filename_tmp, filename);
5191 strcat (filename_tmp, "0");
5193 /* There was an error while processing the module. We delete the
5194 module file, even if it was already there. */
5201 if (gfc_cpp_makedep ())
5202 gfc_cpp_add_target (filename);
5204 /* Write the module to the temporary file. */
5205 module_fp = fopen (filename_tmp, "w");
5206 if (module_fp == NULL)
5207 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
5208 filename_tmp, xstrerror (errno));
5210 /* Write the header, including space reserved for the MD5 sum. */
5214 *strchr (p, '\n') = '\0';
5216 fprintf (module_fp, "GFORTRAN module version '%s' created from %s on %s\n"
5217 "MD5:", MOD_VERSION, gfc_source_file, p);
5218 fgetpos (module_fp, &md5_pos);
5219 fputs ("00000000000000000000000000000000 -- "
5220 "If you edit this, you'll get what you deserve.\n\n", module_fp);
5222 /* Initialize the MD5 context that will be used for output. */
5223 md5_init_ctx (&ctx);
5225 /* Write the module itself. */
5227 strcpy (module_name, name);
5233 free_pi_tree (pi_root);
5238 /* Write the MD5 sum to the header of the module file. */
5239 md5_finish_ctx (&ctx, md5_new);
5240 fsetpos (module_fp, &md5_pos);
5241 for (n = 0; n < 16; n++)
5242 fprintf (module_fp, "%02x", md5_new[n]);
5244 if (fclose (module_fp))
5245 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
5246 filename_tmp, xstrerror (errno));
5248 /* Read the MD5 from the header of the old module file and compare. */
5249 if (read_md5_from_module_file (filename, md5_old) != 0
5250 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
5252 /* Module file have changed, replace the old one. */
5253 if (unlink (filename) && errno != ENOENT)
5254 gfc_fatal_error ("Can't delete module file '%s': %s", filename,
5256 if (rename (filename_tmp, filename))
5257 gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
5258 filename_tmp, filename, xstrerror (errno));
5262 if (unlink (filename_tmp))
5263 gfc_fatal_error ("Can't delete temporary module file '%s': %s",
5264 filename_tmp, xstrerror (errno));
5270 create_intrinsic_function (const char *name, gfc_isym_id id,
5271 const char *modname, intmod_id module)
5273 gfc_intrinsic_sym *isym;
5274 gfc_symtree *tmp_symtree;
5277 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5280 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5282 gfc_error ("Symbol '%s' already declared", name);
5285 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5286 sym = tmp_symtree->n.sym;
5288 isym = gfc_intrinsic_function_by_id (id);
5291 sym->attr.flavor = FL_PROCEDURE;
5292 sym->attr.intrinsic = 1;
5294 sym->module = gfc_get_string (modname);
5295 sym->attr.use_assoc = 1;
5296 sym->from_intmod = module;
5297 sym->intmod_sym_id = id;
5301 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
5302 the current namespace for all named constants, pointer types, and
5303 procedures in the module unless the only clause was used or a rename
5304 list was provided. */
5307 import_iso_c_binding_module (void)
5309 gfc_symbol *mod_sym = NULL;
5310 gfc_symtree *mod_symtree = NULL;
5311 const char *iso_c_module_name = "__iso_c_binding";
5315 /* Look only in the current namespace. */
5316 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
5318 if (mod_symtree == NULL)
5320 /* symtree doesn't already exist in current namespace. */
5321 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree,
5324 if (mod_symtree != NULL)
5325 mod_sym = mod_symtree->n.sym;
5327 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
5328 "create symbol for %s", iso_c_module_name);
5330 mod_sym->attr.flavor = FL_MODULE;
5331 mod_sym->attr.intrinsic = 1;
5332 mod_sym->module = gfc_get_string (iso_c_module_name);
5333 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
5336 /* Generate the symbols for the named constants representing
5337 the kinds for intrinsic data types. */
5338 for (i = 0; i < ISOCBINDING_NUMBER; i++)
5341 for (u = gfc_rename_list; u; u = u->next)
5342 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
5348 #define NAMED_FUNCTION(a,b,c,d) \
5350 create_intrinsic_function (u->local_name[0] ? u->local_name \
5353 iso_c_module_name, \
5354 INTMOD_ISO_C_BINDING); \
5356 #include "iso-c-binding.def"
5357 #undef NAMED_FUNCTION
5360 generate_isocbinding_symbol (iso_c_module_name,
5361 (iso_c_binding_symbol) i,
5362 u->local_name[0] ? u->local_name
5367 if (!found && !only_flag)
5370 #define NAMED_FUNCTION(a,b,c,d) \
5372 if ((gfc_option.allow_std & d) == 0) \
5374 create_intrinsic_function (b, (gfc_isym_id) c, \
5375 iso_c_module_name, \
5376 INTMOD_ISO_C_BINDING); \
5378 #include "iso-c-binding.def"
5379 #undef NAMED_FUNCTION
5382 generate_isocbinding_symbol (iso_c_module_name,
5383 (iso_c_binding_symbol) i, NULL);
5387 for (u = gfc_rename_list; u; u = u->next)
5392 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5393 "module ISO_C_BINDING", u->use_name, &u->where);
5398 /* Add an integer named constant from a given module. */
5401 create_int_parameter (const char *name, int value, const char *modname,
5402 intmod_id module, int id)
5404 gfc_symtree *tmp_symtree;
5407 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5408 if (tmp_symtree != NULL)
5410 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5413 gfc_error ("Symbol '%s' already declared", name);
5416 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5417 sym = tmp_symtree->n.sym;
5419 sym->module = gfc_get_string (modname);
5420 sym->attr.flavor = FL_PARAMETER;
5421 sym->ts.type = BT_INTEGER;
5422 sym->ts.kind = gfc_default_integer_kind;
5423 sym->value = gfc_get_int_expr (gfc_default_integer_kind, NULL, value);
5424 sym->attr.use_assoc = 1;
5425 sym->from_intmod = module;
5426 sym->intmod_sym_id = id;
5430 /* Value is already contained by the array constructor, but not
5434 create_int_parameter_array (const char *name, int size, gfc_expr *value,
5435 const char *modname, intmod_id module, int id)
5437 gfc_symtree *tmp_symtree;
5440 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5441 if (tmp_symtree != NULL)
5443 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
5446 gfc_error ("Symbol '%s' already declared", name);
5449 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5450 sym = tmp_symtree->n.sym;
5452 sym->module = gfc_get_string (modname);
5453 sym->attr.flavor = FL_PARAMETER;
5454 sym->ts.type = BT_INTEGER;
5455 sym->ts.kind = gfc_default_integer_kind;
5456 sym->attr.use_assoc = 1;
5457 sym->from_intmod = module;
5458 sym->intmod_sym_id = id;
5459 sym->attr.dimension = 1;
5460 sym->as = gfc_get_array_spec ();
5462 sym->as->type = AS_EXPLICIT;
5463 sym->as->lower[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
5464 sym->as->upper[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, size);
5467 sym->value->shape = gfc_get_shape (1);
5468 mpz_init_set_ui (sym->value->shape[0], size);
5473 /* USE the ISO_FORTRAN_ENV intrinsic module. */
5476 use_iso_fortran_env_module (void)
5478 static char mod[] = "iso_fortran_env";
5480 gfc_symbol *mod_sym;
5481 gfc_symtree *mod_symtree;
5485 intmod_sym symbol[] = {
5486 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
5487 #include "iso-fortran-env.def"
5489 #define NAMED_KINDARRAY(a,b,c,d) { a, b, 0, d },
5490 #include "iso-fortran-env.def"
5491 #undef NAMED_KINDARRAY
5492 #define NAMED_FUNCTION(a,b,c,d) { a, b, c, d },
5493 #include "iso-fortran-env.def"
5494 #undef NAMED_FUNCTION
5495 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
5498 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
5499 #include "iso-fortran-env.def"
5502 /* Generate the symbol for the module itself. */
5503 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
5504 if (mod_symtree == NULL)
5506 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree, false);
5507 gcc_assert (mod_symtree);
5508 mod_sym = mod_symtree->n.sym;
5510 mod_sym->attr.flavor = FL_MODULE;
5511 mod_sym->attr.intrinsic = 1;
5512 mod_sym->module = gfc_get_string (mod);
5513 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
5516 if (!mod_symtree->n.sym->attr.intrinsic)
5517 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
5518 "non-intrinsic module name used previously", mod);
5520 /* Generate the symbols for the module integer named constants. */
5522 for (i = 0; symbol[i].name; i++)
5525 for (u = gfc_rename_list; u; u = u->next)
5527 if (strcmp (symbol[i].name, u->use_name) == 0)
5532 if (gfc_notify_std (symbol[i].standard, "The symbol '%s', "
5533 "referrenced at %C, is not in the selected "
5534 "standard", symbol[i].name) == FAILURE)
5537 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5538 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5539 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named "
5540 "constant from intrinsic module "
5541 "ISO_FORTRAN_ENV at %C is incompatible with "
5543 gfc_option.flag_default_integer
5544 ? "-fdefault-integer-8"
5545 : "-fdefault-real-8");
5546 switch (symbol[i].id)
5548 #define NAMED_INTCST(a,b,c,d) \
5550 #include "iso-fortran-env.def"
5552 create_int_parameter (u->local_name[0] ? u->local_name
5554 symbol[i].value, mod,
5555 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5558 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5560 expr = gfc_get_array_expr (BT_INTEGER, \
5561 gfc_default_integer_kind,\
5563 for (j = 0; KINDS[j].kind != 0; j++) \
5564 gfc_constructor_append_expr (&expr->value.constructor, \
5565 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5566 KINDS[j].kind), NULL); \
5567 create_int_parameter_array (u->local_name[0] ? u->local_name \
5570 INTMOD_ISO_FORTRAN_ENV, \
5573 #include "iso-fortran-env.def"
5574 #undef NAMED_KINDARRAY
5576 #define NAMED_FUNCTION(a,b,c,d) \
5578 #include "iso-fortran-env.def"
5579 #undef NAMED_FUNCTION
5580 create_intrinsic_function (u->local_name[0] ? u->local_name
5582 (gfc_isym_id) symbol[i].value, mod,
5583 INTMOD_ISO_FORTRAN_ENV);
5592 if (!found && !only_flag)
5594 if ((gfc_option.allow_std & symbol[i].standard) == 0)
5597 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
5598 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
5599 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
5600 "from intrinsic module ISO_FORTRAN_ENV at %C is "
5601 "incompatible with option %s",
5602 gfc_option.flag_default_integer
5603 ? "-fdefault-integer-8" : "-fdefault-real-8");
5605 switch (symbol[i].id)
5607 #define NAMED_INTCST(a,b,c,d) \
5609 #include "iso-fortran-env.def"
5611 create_int_parameter (symbol[i].name, symbol[i].value, mod,
5612 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);
5615 #define NAMED_KINDARRAY(a,b,KINDS,d) \
5617 expr = gfc_get_array_expr (BT_INTEGER, gfc_default_integer_kind, \
5619 for (j = 0; KINDS[j].kind != 0; j++) \
5620 gfc_constructor_append_expr (&expr->value.constructor, \
5621 gfc_get_int_expr (gfc_default_integer_kind, NULL, \
5622 KINDS[j].kind), NULL); \
5623 create_int_parameter_array (symbol[i].name, j, expr, mod, \
5624 INTMOD_ISO_FORTRAN_ENV, symbol[i].id);\
5626 #include "iso-fortran-env.def"
5627 #undef NAMED_KINDARRAY
5629 #define NAMED_FUNCTION(a,b,c,d) \
5631 #include "iso-fortran-env.def"
5632 #undef NAMED_FUNCTION
5633 create_intrinsic_function (symbol[i].name,
5634 (gfc_isym_id) symbol[i].value, mod,
5635 INTMOD_ISO_FORTRAN_ENV);
5644 for (u = gfc_rename_list; u; u = u->next)
5649 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
5650 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
5655 /* Process a USE directive. */
5658 gfc_use_module (void)
5663 gfc_symtree *mod_symtree;
5664 gfc_use_list *use_stmt;
5666 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
5668 strcpy (filename, module_name);
5669 strcat (filename, MODULE_EXTENSION);
5671 /* First, try to find an non-intrinsic module, unless the USE statement
5672 specified that the module is intrinsic. */
5675 module_fp = gfc_open_included_file (filename, true, true);
5677 /* Then, see if it's an intrinsic one, unless the USE statement
5678 specified that the module is non-intrinsic. */
5679 if (module_fp == NULL && !specified_nonint)
5681 if (strcmp (module_name, "iso_fortran_env") == 0
5682 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
5683 "intrinsic module at %C") != FAILURE)
5685 use_iso_fortran_env_module ();
5689 if (strcmp (module_name, "iso_c_binding") == 0
5690 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
5691 "ISO_C_BINDING module at %C") != FAILURE)
5693 import_iso_c_binding_module();
5697 module_fp = gfc_open_intrinsic_module (filename);
5699 if (module_fp == NULL && specified_int)
5700 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5704 if (module_fp == NULL)
5705 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5706 filename, xstrerror (errno));
5708 /* Check that we haven't already USEd an intrinsic module with the
5711 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5712 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5713 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5714 "intrinsic module name used previously", module_name);
5721 /* Skip the first two lines of the module, after checking that this is
5722 a gfortran module file. */
5728 bad_module ("Unexpected end of module");
5731 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5732 || (start == 2 && strcmp (atom_name, " module") != 0))
5733 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5737 if (strcmp (atom_name, " version") != 0
5738 || module_char () != ' '
5739 || parse_atom () != ATOM_STRING)
5740 gfc_fatal_error ("Parse error when checking module version"
5741 " for file '%s' opened at %C", filename);
5743 if (strcmp (atom_string, MOD_VERSION))
5745 gfc_fatal_error ("Wrong module version '%s' (expected '%s') "
5746 "for file '%s' opened at %C", atom_string,
5747 MOD_VERSION, filename);
5757 /* Make sure we're not reading the same module that we may be building. */
5758 for (p = gfc_state_stack; p; p = p->previous)
5759 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5760 gfc_fatal_error ("Can't USE the same module we're building!");
5763 init_true_name_tree ();
5767 free_true_name (true_name_root);
5768 true_name_root = NULL;
5770 free_pi_tree (pi_root);
5775 use_stmt = gfc_get_use_list ();
5776 use_stmt->module_name = gfc_get_string (module_name);
5777 use_stmt->only_flag = only_flag;
5778 use_stmt->rename = gfc_rename_list;
5779 use_stmt->where = use_locus;
5780 gfc_rename_list = NULL;
5781 use_stmt->next = gfc_current_ns->use_stmts;
5782 gfc_current_ns->use_stmts = use_stmt;
5787 gfc_free_use_stmts (gfc_use_list *use_stmts)
5790 for (; use_stmts; use_stmts = next)
5792 gfc_use_rename *next_rename;
5794 for (; use_stmts->rename; use_stmts->rename = next_rename)
5796 next_rename = use_stmts->rename->next;
5797 free (use_stmts->rename);
5799 next = use_stmts->next;
5806 gfc_module_init_2 (void)
5808 last_atom = ATOM_LPAREN;
5813 gfc_module_done_2 (void)