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
4 Free Software Foundation, Inc.
5 Contributed by Andy Vaught
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
23 /* The syntax of gfortran modules resembles that of lisp lists, i.e. a
24 sequence of atoms, which can be left or right parenthesis, names,
25 integers or strings. Parenthesis are always matched which allows
26 us to skip over sections at high speed without having to know
27 anything about the internal structure of the lists. A "name" is
28 usually a fortran 95 identifier, but can also start with '@' in
29 order to reference a hidden symbol.
31 The first line of a module is an informational message about what
32 created the module, the file it came from and when it was created.
33 The second line is a warning for people not to edit the module.
34 The rest of the module looks like:
36 ( ( <Interface info for UPLUS> )
37 ( <Interface info for UMINUS> )
40 ( ( <name of operator interface> <module of op interface> <i/f1> ... )
43 ( ( <name of generic interface> <module of generic interface> <i/f1> ... )
46 ( ( <common name> <symbol> <saved flag>)
52 ( <Symbol Number (in no particular order)>
54 <Module name of symbol>
55 ( <symbol information> )
64 In general, symbols refer to other symbols by their symbol number,
65 which are zero based. Symbols are written to the module in no
73 #include "parse.h" /* FIXME */
76 #define MODULE_EXTENSION ".mod"
79 /* Structure that describes a position within a module file. */
88 /* Structure for list of symbols of intrinsic modules. */
101 P_UNKNOWN = 0, P_OTHER, P_NAMESPACE, P_COMPONENT, P_SYMBOL
105 /* The fixup structure lists pointers to pointers that have to
106 be updated when a pointer value becomes known. */
108 typedef struct fixup_t
111 struct fixup_t *next;
116 /* Structure for holding extra info needed for pointers being read. */
118 typedef struct pointer_info
120 BBT_HEADER (pointer_info);
124 /* The first component of each member of the union is the pointer
131 void *pointer; /* Member for doing pointer searches. */
136 char true_name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
138 { UNUSED, NEEDED, USED }
140 int ns, referenced, renamed;
143 gfc_symtree *symtree;
144 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
152 { UNREFERENCED = 0, NEEDS_WRITE, WRITTEN }
162 #define gfc_get_pointer_info() XCNEW (pointer_info)
165 /* Lists of rename info for the USE statement. */
167 typedef struct gfc_use_rename
169 char local_name[GFC_MAX_SYMBOL_LEN + 1], use_name[GFC_MAX_SYMBOL_LEN + 1];
170 struct gfc_use_rename *next;
177 #define gfc_get_use_rename() XCNEW (gfc_use_rename);
179 /* Local variables */
181 /* The FILE for the module we're reading or writing. */
182 static FILE *module_fp;
184 /* MD5 context structure. */
185 static struct md5_ctx ctx;
187 /* The name of the module we're reading (USE'ing) or writing. */
188 static char module_name[GFC_MAX_SYMBOL_LEN + 1];
190 /* The way the module we're reading was specified. */
191 static bool specified_nonint, specified_int;
193 static int module_line, module_column, only_flag;
195 { IO_INPUT, IO_OUTPUT }
198 static gfc_use_rename *gfc_rename_list;
199 static pointer_info *pi_root;
200 static int symbol_number; /* Counter for assigning symbol numbers */
202 /* Tells mio_expr_ref to make symbols for unused equivalence members. */
203 static bool in_load_equiv;
207 /*****************************************************************/
209 /* Pointer/integer conversion. Pointers between structures are stored
210 as integers in the module file. The next couple of subroutines
211 handle this translation for reading and writing. */
213 /* Recursively free the tree of pointer structures. */
216 free_pi_tree (pointer_info *p)
221 if (p->fixup != NULL)
222 gfc_internal_error ("free_pi_tree(): Unresolved fixup");
224 free_pi_tree (p->left);
225 free_pi_tree (p->right);
231 /* Compare pointers when searching by pointer. Used when writing a
235 compare_pointers (void *_sn1, void *_sn2)
237 pointer_info *sn1, *sn2;
239 sn1 = (pointer_info *) _sn1;
240 sn2 = (pointer_info *) _sn2;
242 if (sn1->u.pointer < sn2->u.pointer)
244 if (sn1->u.pointer > sn2->u.pointer)
251 /* Compare integers when searching by integer. Used when reading a
255 compare_integers (void *_sn1, void *_sn2)
257 pointer_info *sn1, *sn2;
259 sn1 = (pointer_info *) _sn1;
260 sn2 = (pointer_info *) _sn2;
262 if (sn1->integer < sn2->integer)
264 if (sn1->integer > sn2->integer)
271 /* Initialize the pointer_info tree. */
280 compare = (iomode == IO_INPUT) ? compare_integers : compare_pointers;
282 /* Pointer 0 is the NULL pointer. */
283 p = gfc_get_pointer_info ();
288 gfc_insert_bbt (&pi_root, p, compare);
290 /* Pointer 1 is the current namespace. */
291 p = gfc_get_pointer_info ();
292 p->u.pointer = gfc_current_ns;
294 p->type = P_NAMESPACE;
296 gfc_insert_bbt (&pi_root, p, compare);
302 /* During module writing, call here with a pointer to something,
303 returning the pointer_info node. */
305 static pointer_info *
306 find_pointer (void *gp)
313 if (p->u.pointer == gp)
315 p = (gp < p->u.pointer) ? p->left : p->right;
322 /* Given a pointer while writing, returns the pointer_info tree node,
323 creating it if it doesn't exist. */
325 static pointer_info *
326 get_pointer (void *gp)
330 p = find_pointer (gp);
334 /* Pointer doesn't have an integer. Give it one. */
335 p = gfc_get_pointer_info ();
338 p->integer = symbol_number++;
340 gfc_insert_bbt (&pi_root, p, compare_pointers);
346 /* Given an integer during reading, find it in the pointer_info tree,
347 creating the node if not found. */
349 static pointer_info *
350 get_integer (int integer)
360 c = compare_integers (&t, p);
364 p = (c < 0) ? p->left : p->right;
370 p = gfc_get_pointer_info ();
371 p->integer = integer;
374 gfc_insert_bbt (&pi_root, p, compare_integers);
380 /* Recursive function to find a pointer within a tree by brute force. */
382 static pointer_info *
383 fp2 (pointer_info *p, const void *target)
390 if (p->u.pointer == target)
393 q = fp2 (p->left, target);
397 return fp2 (p->right, target);
401 /* During reading, find a pointer_info node from the pointer value.
402 This amounts to a brute-force search. */
404 static pointer_info *
405 find_pointer2 (void *p)
407 return fp2 (pi_root, p);
411 /* Resolve any fixups using a known pointer. */
414 resolve_fixups (fixup_t *f, void *gp)
427 /* Call here during module reading when we know what pointer to
428 associate with an integer. Any fixups that exist are resolved at
432 associate_integer_pointer (pointer_info *p, void *gp)
434 if (p->u.pointer != NULL)
435 gfc_internal_error ("associate_integer_pointer(): Already associated");
439 resolve_fixups (p->fixup, gp);
445 /* During module reading, given an integer and a pointer to a pointer,
446 either store the pointer from an already-known value or create a
447 fixup structure in order to store things later. Returns zero if
448 the reference has been actually stored, or nonzero if the reference
449 must be fixed later (i.e., associate_integer_pointer must be called
450 sometime later. Returns the pointer_info structure. */
452 static pointer_info *
453 add_fixup (int integer, void *gp)
459 p = get_integer (integer);
461 if (p->integer == 0 || p->u.pointer != NULL)
464 *cp = (char *) p->u.pointer;
473 f->pointer = (void **) gp;
480 /*****************************************************************/
482 /* Parser related subroutines */
484 /* Free the rename list left behind by a USE statement. */
489 gfc_use_rename *next;
491 for (; gfc_rename_list; gfc_rename_list = next)
493 next = gfc_rename_list->next;
494 gfc_free (gfc_rename_list);
499 /* Match a USE statement. */
504 char name[GFC_MAX_SYMBOL_LEN + 1], module_nature[GFC_MAX_SYMBOL_LEN + 1];
505 gfc_use_rename *tail = NULL, *new_use;
506 interface_type type, type2;
510 specified_int = false;
511 specified_nonint = false;
513 if (gfc_match (" , ") == MATCH_YES)
515 if ((m = gfc_match (" %n ::", module_nature)) == MATCH_YES)
517 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: module "
518 "nature in USE statement at %C") == FAILURE)
521 if (strcmp (module_nature, "intrinsic") == 0)
522 specified_int = true;
525 if (strcmp (module_nature, "non_intrinsic") == 0)
526 specified_nonint = true;
529 gfc_error ("Module nature in USE statement at %C shall "
530 "be either INTRINSIC or NON_INTRINSIC");
537 /* Help output a better error message than "Unclassifiable
539 gfc_match (" %n", module_nature);
540 if (strcmp (module_nature, "intrinsic") == 0
541 || strcmp (module_nature, "non_intrinsic") == 0)
542 gfc_error ("\"::\" was expected after module nature at %C "
543 "but was not found");
549 m = gfc_match (" ::");
550 if (m == MATCH_YES &&
551 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
552 "\"USE :: module\" at %C") == FAILURE)
557 m = gfc_match ("% ");
563 m = gfc_match_name (module_name);
570 if (gfc_match_eos () == MATCH_YES)
572 if (gfc_match_char (',') != MATCH_YES)
575 if (gfc_match (" only :") == MATCH_YES)
578 if (gfc_match_eos () == MATCH_YES)
583 /* Get a new rename struct and add it to the rename list. */
584 new_use = gfc_get_use_rename ();
585 new_use->where = gfc_current_locus;
588 if (gfc_rename_list == NULL)
589 gfc_rename_list = new_use;
591 tail->next = new_use;
594 /* See what kind of interface we're dealing with. Assume it is
596 new_use->op = INTRINSIC_NONE;
597 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
602 case INTERFACE_NAMELESS:
603 gfc_error ("Missing generic specification in USE statement at %C");
606 case INTERFACE_USER_OP:
607 case INTERFACE_GENERIC:
608 m = gfc_match (" =>");
610 if (type == INTERFACE_USER_OP && m == MATCH_YES
611 && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Renaming "
612 "operators in USE statements at %C")
616 if (type == INTERFACE_USER_OP)
617 new_use->op = INTRINSIC_USER;
622 strcpy (new_use->use_name, name);
625 strcpy (new_use->local_name, name);
626 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
631 if (m == MATCH_ERROR)
639 strcpy (new_use->local_name, name);
641 m = gfc_match_generic_spec (&type2, new_use->use_name, &op);
646 if (m == MATCH_ERROR)
650 if (strcmp (new_use->use_name, module_name) == 0
651 || strcmp (new_use->local_name, module_name) == 0)
653 gfc_error ("The name '%s' at %C has already been used as "
654 "an external module name.", module_name);
659 case INTERFACE_INTRINSIC_OP:
667 if (gfc_match_eos () == MATCH_YES)
669 if (gfc_match_char (',') != MATCH_YES)
676 gfc_syntax_error (ST_USE);
684 /* Given a name and a number, inst, return the inst name
685 under which to load this symbol. Returns NULL if this
686 symbol shouldn't be loaded. If inst is zero, returns
687 the number of instances of this name. If interface is
688 true, a user-defined operator is sought, otherwise only
689 non-operators are sought. */
692 find_use_name_n (const char *name, int *inst, bool interface)
698 for (u = gfc_rename_list; u; u = u->next)
700 if (strcmp (u->use_name, name) != 0
701 || (u->op == INTRINSIC_USER && !interface)
702 || (u->op != INTRINSIC_USER && interface))
715 return only_flag ? NULL : name;
719 return (u->local_name[0] != '\0') ? u->local_name : name;
723 /* Given a name, return the name under which to load this symbol.
724 Returns NULL if this symbol shouldn't be loaded. */
727 find_use_name (const char *name, bool interface)
730 return find_use_name_n (name, &i, interface);
734 /* Given a real name, return the number of use names associated with it. */
737 number_use_names (const char *name, bool interface)
741 c = find_use_name_n (name, &i, interface);
746 /* Try to find the operator in the current list. */
748 static gfc_use_rename *
749 find_use_operator (gfc_intrinsic_op op)
753 for (u = gfc_rename_list; u; u = u->next)
761 /*****************************************************************/
763 /* The next couple of subroutines maintain a tree used to avoid a
764 brute-force search for a combination of true name and module name.
765 While symtree names, the name that a particular symbol is known by
766 can changed with USE statements, we still have to keep track of the
767 true names to generate the correct reference, and also avoid
768 loading the same real symbol twice in a program unit.
770 When we start reading, the true name tree is built and maintained
771 as symbols are read. The tree is searched as we load new symbols
772 to see if it already exists someplace in the namespace. */
774 typedef struct true_name
776 BBT_HEADER (true_name);
781 static true_name *true_name_root;
784 /* Compare two true_name structures. */
787 compare_true_names (void *_t1, void *_t2)
792 t1 = (true_name *) _t1;
793 t2 = (true_name *) _t2;
795 c = ((t1->sym->module > t2->sym->module)
796 - (t1->sym->module < t2->sym->module));
800 return strcmp (t1->sym->name, t2->sym->name);
804 /* Given a true name, search the true name tree to see if it exists
805 within the main namespace. */
808 find_true_name (const char *name, const char *module)
814 sym.name = gfc_get_string (name);
816 sym.module = gfc_get_string (module);
824 c = compare_true_names ((void *) (&t), (void *) p);
828 p = (c < 0) ? p->left : p->right;
835 /* Given a gfc_symbol pointer that is not in the true name tree, add it. */
838 add_true_name (gfc_symbol *sym)
842 t = XCNEW (true_name);
845 gfc_insert_bbt (&true_name_root, t, compare_true_names);
849 /* Recursive function to build the initial true name tree by
850 recursively traversing the current namespace. */
853 build_tnt (gfc_symtree *st)
858 build_tnt (st->left);
859 build_tnt (st->right);
861 if (find_true_name (st->n.sym->name, st->n.sym->module) != NULL)
864 add_true_name (st->n.sym);
868 /* Initialize the true name tree with the current namespace. */
871 init_true_name_tree (void)
873 true_name_root = NULL;
874 build_tnt (gfc_current_ns->sym_root);
878 /* Recursively free a true name tree node. */
881 free_true_name (true_name *t)
885 free_true_name (t->left);
886 free_true_name (t->right);
892 /*****************************************************************/
894 /* Module reading and writing. */
898 ATOM_NAME, ATOM_LPAREN, ATOM_RPAREN, ATOM_INTEGER, ATOM_STRING
902 static atom_type last_atom;
905 /* The name buffer must be at least as long as a symbol name. Right
906 now it's not clear how we're going to store numeric constants--
907 probably as a hexadecimal string, since this will allow the exact
908 number to be preserved (this can't be done by a decimal
909 representation). Worry about that later. TODO! */
911 #define MAX_ATOM_SIZE 100
914 static char *atom_string, atom_name[MAX_ATOM_SIZE];
917 /* Report problems with a module. Error reporting is not very
918 elaborate, since this sorts of errors shouldn't really happen.
919 This subroutine never returns. */
921 static void bad_module (const char *) ATTRIBUTE_NORETURN;
924 bad_module (const char *msgid)
931 gfc_fatal_error ("Reading module %s at line %d column %d: %s",
932 module_name, module_line, module_column, msgid);
935 gfc_fatal_error ("Writing module %s at line %d column %d: %s",
936 module_name, module_line, module_column, msgid);
939 gfc_fatal_error ("Module %s at line %d column %d: %s",
940 module_name, module_line, module_column, msgid);
946 /* Set the module's input pointer. */
949 set_module_locus (module_locus *m)
951 module_column = m->column;
952 module_line = m->line;
953 fsetpos (module_fp, &m->pos);
957 /* Get the module's input pointer so that we can restore it later. */
960 get_module_locus (module_locus *m)
962 m->column = module_column;
963 m->line = module_line;
964 fgetpos (module_fp, &m->pos);
968 /* Get the next character in the module, updating our reckoning of
976 c = getc (module_fp);
979 bad_module ("Unexpected EOF");
992 /* Parse a string constant. The delimiter is guaranteed to be a
1002 get_module_locus (&start);
1006 /* See how long the string is. */
1011 bad_module ("Unexpected end of module in string constant");
1029 set_module_locus (&start);
1031 atom_string = p = XCNEWVEC (char, len + 1);
1033 for (; len > 0; len--)
1037 module_char (); /* Guaranteed to be another \'. */
1041 module_char (); /* Terminating \'. */
1042 *p = '\0'; /* C-style string for debug purposes. */
1046 /* Parse a small integer. */
1049 parse_integer (int c)
1057 get_module_locus (&m);
1063 atom_int = 10 * atom_int + c - '0';
1064 if (atom_int > 99999999)
1065 bad_module ("Integer overflow");
1068 set_module_locus (&m);
1086 get_module_locus (&m);
1091 if (!ISALNUM (c) && c != '_' && c != '-')
1095 if (++len > GFC_MAX_SYMBOL_LEN)
1096 bad_module ("Name too long");
1101 fseek (module_fp, -1, SEEK_CUR);
1102 module_column = m.column + len - 1;
1109 /* Read the next atom in the module's input stream. */
1120 while (c == ' ' || c == '\r' || c == '\n');
1145 return ATOM_INTEGER;
1203 bad_module ("Bad name");
1210 /* Peek at the next atom on the input. */
1218 get_module_locus (&m);
1221 if (a == ATOM_STRING)
1222 gfc_free (atom_string);
1224 set_module_locus (&m);
1229 /* Read the next atom from the input, requiring that it be a
1233 require_atom (atom_type type)
1239 get_module_locus (&m);
1247 p = _("Expected name");
1250 p = _("Expected left parenthesis");
1253 p = _("Expected right parenthesis");
1256 p = _("Expected integer");
1259 p = _("Expected string");
1262 gfc_internal_error ("require_atom(): bad atom type required");
1265 set_module_locus (&m);
1271 /* Given a pointer to an mstring array, require that the current input
1272 be one of the strings in the array. We return the enum value. */
1275 find_enum (const mstring *m)
1279 i = gfc_string2code (m, atom_name);
1283 bad_module ("find_enum(): Enum not found");
1289 /**************** Module output subroutines ***************************/
1291 /* Output a character to a module file. */
1294 write_char (char out)
1296 if (putc (out, module_fp) == EOF)
1297 gfc_fatal_error ("Error writing modules file: %s", strerror (errno));
1299 /* Add this to our MD5. */
1300 md5_process_bytes (&out, sizeof (out), &ctx);
1312 /* Write an atom to a module. The line wrapping isn't perfect, but it
1313 should work most of the time. This isn't that big of a deal, since
1314 the file really isn't meant to be read by people anyway. */
1317 write_atom (atom_type atom, const void *v)
1327 p = (const char *) v;
1339 i = *((const int *) v);
1341 gfc_internal_error ("write_atom(): Writing negative integer");
1343 sprintf (buffer, "%d", i);
1348 gfc_internal_error ("write_atom(): Trying to write dab atom");
1352 if(p == NULL || *p == '\0')
1357 if (atom != ATOM_RPAREN)
1359 if (module_column + len > 72)
1364 if (last_atom != ATOM_LPAREN && module_column != 1)
1369 if (atom == ATOM_STRING)
1372 while (p != NULL && *p)
1374 if (atom == ATOM_STRING && *p == '\'')
1379 if (atom == ATOM_STRING)
1387 /***************** Mid-level I/O subroutines *****************/
1389 /* These subroutines let their caller read or write atoms without
1390 caring about which of the two is actually happening. This lets a
1391 subroutine concentrate on the actual format of the data being
1394 static void mio_expr (gfc_expr **);
1395 pointer_info *mio_symbol_ref (gfc_symbol **);
1396 pointer_info *mio_interface_rest (gfc_interface **);
1397 static void mio_symtree_ref (gfc_symtree **);
1399 /* Read or write an enumerated value. On writing, we return the input
1400 value for the convenience of callers. We avoid using an integer
1401 pointer because enums are sometimes inside bitfields. */
1404 mio_name (int t, const mstring *m)
1406 if (iomode == IO_OUTPUT)
1407 write_atom (ATOM_NAME, gfc_code2string (m, t));
1410 require_atom (ATOM_NAME);
1417 /* Specialization of mio_name. */
1419 #define DECL_MIO_NAME(TYPE) \
1420 static inline TYPE \
1421 MIO_NAME(TYPE) (TYPE t, const mstring *m) \
1423 return (TYPE) mio_name ((int) t, m); \
1425 #define MIO_NAME(TYPE) mio_name_##TYPE
1430 if (iomode == IO_OUTPUT)
1431 write_atom (ATOM_LPAREN, NULL);
1433 require_atom (ATOM_LPAREN);
1440 if (iomode == IO_OUTPUT)
1441 write_atom (ATOM_RPAREN, NULL);
1443 require_atom (ATOM_RPAREN);
1448 mio_integer (int *ip)
1450 if (iomode == IO_OUTPUT)
1451 write_atom (ATOM_INTEGER, ip);
1454 require_atom (ATOM_INTEGER);
1460 /* Read or write a character pointer that points to a string on the heap. */
1463 mio_allocated_string (const char *s)
1465 if (iomode == IO_OUTPUT)
1467 write_atom (ATOM_STRING, s);
1472 require_atom (ATOM_STRING);
1478 /* Functions for quoting and unquoting strings. */
1481 quote_string (const gfc_char_t *s, const size_t slength)
1483 const gfc_char_t *p;
1487 /* Calculate the length we'll need: a backslash takes two ("\\"),
1488 non-printable characters take 10 ("\Uxxxxxxxx") and others take 1. */
1489 for (p = s, i = 0; i < slength; p++, i++)
1493 else if (!gfc_wide_is_printable (*p))
1499 q = res = XCNEWVEC (char, len + 1);
1500 for (p = s, i = 0; i < slength; p++, i++)
1503 *q++ = '\\', *q++ = '\\';
1504 else if (!gfc_wide_is_printable (*p))
1506 sprintf (q, "\\U%08" HOST_WIDE_INT_PRINT "x",
1507 (unsigned HOST_WIDE_INT) *p);
1511 *q++ = (unsigned char) *p;
1519 unquote_string (const char *s)
1525 for (p = s, len = 0; *p; p++, len++)
1532 else if (p[1] == 'U')
1533 p += 9; /* That is a "\U????????". */
1535 gfc_internal_error ("unquote_string(): got bad string");
1538 res = gfc_get_wide_string (len + 1);
1539 for (i = 0, p = s; i < len; i++, p++)
1544 res[i] = (unsigned char) *p;
1545 else if (p[1] == '\\')
1547 res[i] = (unsigned char) '\\';
1552 /* We read the 8-digits hexadecimal constant that follows. */
1557 gcc_assert (p[1] == 'U');
1558 for (j = 0; j < 8; j++)
1561 gcc_assert (sscanf (&p[j+2], "%01x", &n) == 1);
1575 /* Read or write a character pointer that points to a wide string on the
1576 heap, performing quoting/unquoting of nonprintable characters using the
1577 form \U???????? (where each ? is a hexadecimal digit).
1578 Length is the length of the string, only known and used in output mode. */
1580 static const gfc_char_t *
1581 mio_allocated_wide_string (const gfc_char_t *s, const size_t length)
1583 if (iomode == IO_OUTPUT)
1585 char *quoted = quote_string (s, length);
1586 write_atom (ATOM_STRING, quoted);
1592 gfc_char_t *unquoted;
1594 require_atom (ATOM_STRING);
1595 unquoted = unquote_string (atom_string);
1596 gfc_free (atom_string);
1602 /* Read or write a string that is in static memory. */
1605 mio_pool_string (const char **stringp)
1607 /* TODO: one could write the string only once, and refer to it via a
1610 /* As a special case we have to deal with a NULL string. This
1611 happens for the 'module' member of 'gfc_symbol's that are not in a
1612 module. We read / write these as the empty string. */
1613 if (iomode == IO_OUTPUT)
1615 const char *p = *stringp == NULL ? "" : *stringp;
1616 write_atom (ATOM_STRING, p);
1620 require_atom (ATOM_STRING);
1621 *stringp = atom_string[0] == '\0' ? NULL : gfc_get_string (atom_string);
1622 gfc_free (atom_string);
1627 /* Read or write a string that is inside of some already-allocated
1631 mio_internal_string (char *string)
1633 if (iomode == IO_OUTPUT)
1634 write_atom (ATOM_STRING, string);
1637 require_atom (ATOM_STRING);
1638 strcpy (string, atom_string);
1639 gfc_free (atom_string);
1645 { AB_ALLOCATABLE, AB_DIMENSION, AB_EXTERNAL, AB_INTRINSIC, AB_OPTIONAL,
1646 AB_POINTER, AB_TARGET, AB_DUMMY, AB_RESULT, AB_DATA,
1647 AB_IN_NAMELIST, AB_IN_COMMON, AB_FUNCTION, AB_SUBROUTINE, AB_SEQUENCE,
1648 AB_ELEMENTAL, AB_PURE, AB_RECURSIVE, AB_GENERIC, AB_ALWAYS_EXPLICIT,
1649 AB_CRAY_POINTER, AB_CRAY_POINTEE, AB_THREADPRIVATE, AB_ALLOC_COMP,
1650 AB_POINTER_COMP, AB_PRIVATE_COMP, AB_VALUE, AB_VOLATILE, AB_PROTECTED,
1651 AB_IS_BIND_C, AB_IS_C_INTEROP, AB_IS_ISO_C, AB_ABSTRACT, AB_ZERO_COMP,
1656 static const mstring attr_bits[] =
1658 minit ("ALLOCATABLE", AB_ALLOCATABLE),
1659 minit ("DIMENSION", AB_DIMENSION),
1660 minit ("EXTERNAL", AB_EXTERNAL),
1661 minit ("INTRINSIC", AB_INTRINSIC),
1662 minit ("OPTIONAL", AB_OPTIONAL),
1663 minit ("POINTER", AB_POINTER),
1664 minit ("VOLATILE", AB_VOLATILE),
1665 minit ("TARGET", AB_TARGET),
1666 minit ("THREADPRIVATE", AB_THREADPRIVATE),
1667 minit ("DUMMY", AB_DUMMY),
1668 minit ("RESULT", AB_RESULT),
1669 minit ("DATA", AB_DATA),
1670 minit ("IN_NAMELIST", AB_IN_NAMELIST),
1671 minit ("IN_COMMON", AB_IN_COMMON),
1672 minit ("FUNCTION", AB_FUNCTION),
1673 minit ("SUBROUTINE", AB_SUBROUTINE),
1674 minit ("SEQUENCE", AB_SEQUENCE),
1675 minit ("ELEMENTAL", AB_ELEMENTAL),
1676 minit ("PURE", AB_PURE),
1677 minit ("RECURSIVE", AB_RECURSIVE),
1678 minit ("GENERIC", AB_GENERIC),
1679 minit ("ALWAYS_EXPLICIT", AB_ALWAYS_EXPLICIT),
1680 minit ("CRAY_POINTER", AB_CRAY_POINTER),
1681 minit ("CRAY_POINTEE", AB_CRAY_POINTEE),
1682 minit ("IS_BIND_C", AB_IS_BIND_C),
1683 minit ("IS_C_INTEROP", AB_IS_C_INTEROP),
1684 minit ("IS_ISO_C", AB_IS_ISO_C),
1685 minit ("VALUE", AB_VALUE),
1686 minit ("ALLOC_COMP", AB_ALLOC_COMP),
1687 minit ("POINTER_COMP", AB_POINTER_COMP),
1688 minit ("PRIVATE_COMP", AB_PRIVATE_COMP),
1689 minit ("ZERO_COMP", AB_ZERO_COMP),
1690 minit ("PROTECTED", AB_PROTECTED),
1691 minit ("ABSTRACT", AB_ABSTRACT),
1692 minit ("EXTENSION", AB_EXTENSION),
1697 /* Specialization of mio_name. */
1698 DECL_MIO_NAME (ab_attribute)
1699 DECL_MIO_NAME (ar_type)
1700 DECL_MIO_NAME (array_type)
1702 DECL_MIO_NAME (expr_t)
1703 DECL_MIO_NAME (gfc_access)
1704 DECL_MIO_NAME (gfc_intrinsic_op)
1705 DECL_MIO_NAME (ifsrc)
1706 DECL_MIO_NAME (save_state)
1707 DECL_MIO_NAME (procedure_type)
1708 DECL_MIO_NAME (ref_type)
1709 DECL_MIO_NAME (sym_flavor)
1710 DECL_MIO_NAME (sym_intent)
1711 #undef DECL_MIO_NAME
1713 /* Symbol attributes are stored in list with the first three elements
1714 being the enumerated fields, while the remaining elements (if any)
1715 indicate the individual attribute bits. The access field is not
1716 saved-- it controls what symbols are exported when a module is
1720 mio_symbol_attribute (symbol_attribute *attr)
1726 attr->flavor = MIO_NAME (sym_flavor) (attr->flavor, flavors);
1727 attr->intent = MIO_NAME (sym_intent) (attr->intent, intents);
1728 attr->proc = MIO_NAME (procedure_type) (attr->proc, procedures);
1729 attr->if_source = MIO_NAME (ifsrc) (attr->if_source, ifsrc_types);
1730 attr->save = MIO_NAME (save_state) (attr->save, save_status);
1732 if (iomode == IO_OUTPUT)
1734 if (attr->allocatable)
1735 MIO_NAME (ab_attribute) (AB_ALLOCATABLE, attr_bits);
1736 if (attr->dimension)
1737 MIO_NAME (ab_attribute) (AB_DIMENSION, attr_bits);
1739 MIO_NAME (ab_attribute) (AB_EXTERNAL, attr_bits);
1740 if (attr->intrinsic)
1741 MIO_NAME (ab_attribute) (AB_INTRINSIC, attr_bits);
1743 MIO_NAME (ab_attribute) (AB_OPTIONAL, attr_bits);
1745 MIO_NAME (ab_attribute) (AB_POINTER, attr_bits);
1746 if (attr->is_protected)
1747 MIO_NAME (ab_attribute) (AB_PROTECTED, attr_bits);
1749 MIO_NAME (ab_attribute) (AB_VALUE, attr_bits);
1750 if (attr->volatile_)
1751 MIO_NAME (ab_attribute) (AB_VOLATILE, attr_bits);
1753 MIO_NAME (ab_attribute) (AB_TARGET, attr_bits);
1754 if (attr->threadprivate)
1755 MIO_NAME (ab_attribute) (AB_THREADPRIVATE, attr_bits);
1757 MIO_NAME (ab_attribute) (AB_DUMMY, attr_bits);
1759 MIO_NAME (ab_attribute) (AB_RESULT, attr_bits);
1760 /* We deliberately don't preserve the "entry" flag. */
1763 MIO_NAME (ab_attribute) (AB_DATA, attr_bits);
1764 if (attr->in_namelist)
1765 MIO_NAME (ab_attribute) (AB_IN_NAMELIST, attr_bits);
1766 if (attr->in_common)
1767 MIO_NAME (ab_attribute) (AB_IN_COMMON, attr_bits);
1770 MIO_NAME (ab_attribute) (AB_FUNCTION, attr_bits);
1771 if (attr->subroutine)
1772 MIO_NAME (ab_attribute) (AB_SUBROUTINE, attr_bits);
1774 MIO_NAME (ab_attribute) (AB_GENERIC, attr_bits);
1776 MIO_NAME (ab_attribute) (AB_ABSTRACT, attr_bits);
1779 MIO_NAME (ab_attribute) (AB_SEQUENCE, attr_bits);
1780 if (attr->elemental)
1781 MIO_NAME (ab_attribute) (AB_ELEMENTAL, attr_bits);
1783 MIO_NAME (ab_attribute) (AB_PURE, attr_bits);
1784 if (attr->recursive)
1785 MIO_NAME (ab_attribute) (AB_RECURSIVE, attr_bits);
1786 if (attr->always_explicit)
1787 MIO_NAME (ab_attribute) (AB_ALWAYS_EXPLICIT, attr_bits);
1788 if (attr->cray_pointer)
1789 MIO_NAME (ab_attribute) (AB_CRAY_POINTER, attr_bits);
1790 if (attr->cray_pointee)
1791 MIO_NAME (ab_attribute) (AB_CRAY_POINTEE, attr_bits);
1792 if (attr->is_bind_c)
1793 MIO_NAME(ab_attribute) (AB_IS_BIND_C, attr_bits);
1794 if (attr->is_c_interop)
1795 MIO_NAME(ab_attribute) (AB_IS_C_INTEROP, attr_bits);
1797 MIO_NAME(ab_attribute) (AB_IS_ISO_C, attr_bits);
1798 if (attr->alloc_comp)
1799 MIO_NAME (ab_attribute) (AB_ALLOC_COMP, attr_bits);
1800 if (attr->pointer_comp)
1801 MIO_NAME (ab_attribute) (AB_POINTER_COMP, attr_bits);
1802 if (attr->private_comp)
1803 MIO_NAME (ab_attribute) (AB_PRIVATE_COMP, attr_bits);
1804 if (attr->zero_comp)
1805 MIO_NAME (ab_attribute) (AB_ZERO_COMP, attr_bits);
1806 if (attr->extension)
1807 MIO_NAME (ab_attribute) (AB_EXTENSION, attr_bits);
1817 if (t == ATOM_RPAREN)
1820 bad_module ("Expected attribute bit name");
1822 switch ((ab_attribute) find_enum (attr_bits))
1824 case AB_ALLOCATABLE:
1825 attr->allocatable = 1;
1828 attr->dimension = 1;
1834 attr->intrinsic = 1;
1843 attr->is_protected = 1;
1849 attr->volatile_ = 1;
1854 case AB_THREADPRIVATE:
1855 attr->threadprivate = 1;
1866 case AB_IN_NAMELIST:
1867 attr->in_namelist = 1;
1870 attr->in_common = 1;
1876 attr->subroutine = 1;
1888 attr->elemental = 1;
1894 attr->recursive = 1;
1896 case AB_ALWAYS_EXPLICIT:
1897 attr->always_explicit = 1;
1899 case AB_CRAY_POINTER:
1900 attr->cray_pointer = 1;
1902 case AB_CRAY_POINTEE:
1903 attr->cray_pointee = 1;
1906 attr->is_bind_c = 1;
1908 case AB_IS_C_INTEROP:
1909 attr->is_c_interop = 1;
1915 attr->alloc_comp = 1;
1917 case AB_POINTER_COMP:
1918 attr->pointer_comp = 1;
1920 case AB_PRIVATE_COMP:
1921 attr->private_comp = 1;
1924 attr->zero_comp = 1;
1927 attr->extension = 1;
1935 static const mstring bt_types[] = {
1936 minit ("INTEGER", BT_INTEGER),
1937 minit ("REAL", BT_REAL),
1938 minit ("COMPLEX", BT_COMPLEX),
1939 minit ("LOGICAL", BT_LOGICAL),
1940 minit ("CHARACTER", BT_CHARACTER),
1941 minit ("DERIVED", BT_DERIVED),
1942 minit ("PROCEDURE", BT_PROCEDURE),
1943 minit ("UNKNOWN", BT_UNKNOWN),
1944 minit ("VOID", BT_VOID),
1950 mio_charlen (gfc_charlen **clp)
1956 if (iomode == IO_OUTPUT)
1960 mio_expr (&cl->length);
1964 if (peek_atom () != ATOM_RPAREN)
1966 cl = gfc_get_charlen ();
1967 mio_expr (&cl->length);
1971 cl->next = gfc_current_ns->cl_list;
1972 gfc_current_ns->cl_list = cl;
1980 /* See if a name is a generated name. */
1983 check_unique_name (const char *name)
1985 return *name == '@';
1990 mio_typespec (gfc_typespec *ts)
1994 ts->type = MIO_NAME (bt) (ts->type, bt_types);
1996 if (ts->type != BT_DERIVED)
1997 mio_integer (&ts->kind);
1999 mio_symbol_ref (&ts->derived);
2001 /* Add info for C interop and is_iso_c. */
2002 mio_integer (&ts->is_c_interop);
2003 mio_integer (&ts->is_iso_c);
2005 /* If the typespec is for an identifier either from iso_c_binding, or
2006 a constant that was initialized to an identifier from it, use the
2007 f90_type. Otherwise, use the ts->type, since it shouldn't matter. */
2009 ts->f90_type = MIO_NAME (bt) (ts->f90_type, bt_types);
2011 ts->f90_type = MIO_NAME (bt) (ts->type, bt_types);
2013 if (ts->type != BT_CHARACTER)
2015 /* ts->cl is only valid for BT_CHARACTER. */
2020 mio_charlen (&ts->cl);
2026 static const mstring array_spec_types[] = {
2027 minit ("EXPLICIT", AS_EXPLICIT),
2028 minit ("ASSUMED_SHAPE", AS_ASSUMED_SHAPE),
2029 minit ("DEFERRED", AS_DEFERRED),
2030 minit ("ASSUMED_SIZE", AS_ASSUMED_SIZE),
2036 mio_array_spec (gfc_array_spec **asp)
2043 if (iomode == IO_OUTPUT)
2051 if (peek_atom () == ATOM_RPAREN)
2057 *asp = as = gfc_get_array_spec ();
2060 mio_integer (&as->rank);
2061 as->type = MIO_NAME (array_type) (as->type, array_spec_types);
2063 for (i = 0; i < as->rank; i++)
2065 mio_expr (&as->lower[i]);
2066 mio_expr (&as->upper[i]);
2074 /* Given a pointer to an array reference structure (which lives in a
2075 gfc_ref structure), find the corresponding array specification
2076 structure. Storing the pointer in the ref structure doesn't quite
2077 work when loading from a module. Generating code for an array
2078 reference also needs more information than just the array spec. */
2080 static const mstring array_ref_types[] = {
2081 minit ("FULL", AR_FULL),
2082 minit ("ELEMENT", AR_ELEMENT),
2083 minit ("SECTION", AR_SECTION),
2089 mio_array_ref (gfc_array_ref *ar)
2094 ar->type = MIO_NAME (ar_type) (ar->type, array_ref_types);
2095 mio_integer (&ar->dimen);
2103 for (i = 0; i < ar->dimen; i++)
2104 mio_expr (&ar->start[i]);
2109 for (i = 0; i < ar->dimen; i++)
2111 mio_expr (&ar->start[i]);
2112 mio_expr (&ar->end[i]);
2113 mio_expr (&ar->stride[i]);
2119 gfc_internal_error ("mio_array_ref(): Unknown array ref");
2122 /* Unfortunately, ar->dimen_type is an anonymous enumerated type so
2123 we can't call mio_integer directly. Instead loop over each element
2124 and cast it to/from an integer. */
2125 if (iomode == IO_OUTPUT)
2127 for (i = 0; i < ar->dimen; i++)
2129 int tmp = (int)ar->dimen_type[i];
2130 write_atom (ATOM_INTEGER, &tmp);
2135 for (i = 0; i < ar->dimen; i++)
2137 require_atom (ATOM_INTEGER);
2138 ar->dimen_type[i] = atom_int;
2142 if (iomode == IO_INPUT)
2144 ar->where = gfc_current_locus;
2146 for (i = 0; i < ar->dimen; i++)
2147 ar->c_where[i] = gfc_current_locus;
2154 /* Saves or restores a pointer. The pointer is converted back and
2155 forth from an integer. We return the pointer_info pointer so that
2156 the caller can take additional action based on the pointer type. */
2158 static pointer_info *
2159 mio_pointer_ref (void *gp)
2163 if (iomode == IO_OUTPUT)
2165 p = get_pointer (*((char **) gp));
2166 write_atom (ATOM_INTEGER, &p->integer);
2170 require_atom (ATOM_INTEGER);
2171 p = add_fixup (atom_int, gp);
2178 /* Save and load references to components that occur within
2179 expressions. We have to describe these references by a number and
2180 by name. The number is necessary for forward references during
2181 reading, and the name is necessary if the symbol already exists in
2182 the namespace and is not loaded again. */
2185 mio_component_ref (gfc_component **cp, gfc_symbol *sym)
2187 char name[GFC_MAX_SYMBOL_LEN + 1];
2191 p = mio_pointer_ref (cp);
2192 if (p->type == P_UNKNOWN)
2193 p->type = P_COMPONENT;
2195 if (iomode == IO_OUTPUT)
2196 mio_pool_string (&(*cp)->name);
2199 mio_internal_string (name);
2201 /* It can happen that a component reference can be read before the
2202 associated derived type symbol has been loaded. Return now and
2203 wait for a later iteration of load_needed. */
2207 if (sym->components != NULL && p->u.pointer == NULL)
2209 /* Symbol already loaded, so search by name. */
2210 for (q = sym->components; q; q = q->next)
2211 if (strcmp (q->name, name) == 0)
2215 gfc_internal_error ("mio_component_ref(): Component not found");
2217 associate_integer_pointer (p, q);
2220 /* Make sure this symbol will eventually be loaded. */
2221 p = find_pointer2 (sym);
2222 if (p->u.rsym.state == UNUSED)
2223 p->u.rsym.state = NEEDED;
2229 mio_component (gfc_component *c)
2236 if (iomode == IO_OUTPUT)
2238 p = get_pointer (c);
2239 mio_integer (&p->integer);
2244 p = get_integer (n);
2245 associate_integer_pointer (p, c);
2248 if (p->type == P_UNKNOWN)
2249 p->type = P_COMPONENT;
2251 mio_pool_string (&c->name);
2252 mio_typespec (&c->ts);
2253 mio_array_spec (&c->as);
2255 mio_integer (&c->dimension);
2256 mio_integer (&c->pointer);
2257 mio_integer (&c->allocatable);
2258 c->access = MIO_NAME (gfc_access) (c->access, access_types);
2260 mio_expr (&c->initializer);
2266 mio_component_list (gfc_component **cp)
2268 gfc_component *c, *tail;
2272 if (iomode == IO_OUTPUT)
2274 for (c = *cp; c; c = c->next)
2284 if (peek_atom () == ATOM_RPAREN)
2287 c = gfc_get_component ();
2304 mio_actual_arg (gfc_actual_arglist *a)
2307 mio_pool_string (&a->name);
2308 mio_expr (&a->expr);
2314 mio_actual_arglist (gfc_actual_arglist **ap)
2316 gfc_actual_arglist *a, *tail;
2320 if (iomode == IO_OUTPUT)
2322 for (a = *ap; a; a = a->next)
2332 if (peek_atom () != ATOM_LPAREN)
2335 a = gfc_get_actual_arglist ();
2351 /* Read and write formal argument lists. */
2354 mio_formal_arglist (gfc_symbol *sym)
2356 gfc_formal_arglist *f, *tail;
2360 if (iomode == IO_OUTPUT)
2362 for (f = sym->formal; f; f = f->next)
2363 mio_symbol_ref (&f->sym);
2367 sym->formal = tail = NULL;
2369 while (peek_atom () != ATOM_RPAREN)
2371 f = gfc_get_formal_arglist ();
2372 mio_symbol_ref (&f->sym);
2374 if (sym->formal == NULL)
2387 /* Save or restore a reference to a symbol node. */
2390 mio_symbol_ref (gfc_symbol **symp)
2394 p = mio_pointer_ref (symp);
2395 if (p->type == P_UNKNOWN)
2398 if (iomode == IO_OUTPUT)
2400 if (p->u.wsym.state == UNREFERENCED)
2401 p->u.wsym.state = NEEDS_WRITE;
2405 if (p->u.rsym.state == UNUSED)
2406 p->u.rsym.state = NEEDED;
2412 /* Save or restore a reference to a symtree node. */
2415 mio_symtree_ref (gfc_symtree **stp)
2420 if (iomode == IO_OUTPUT)
2421 mio_symbol_ref (&(*stp)->n.sym);
2424 require_atom (ATOM_INTEGER);
2425 p = get_integer (atom_int);
2427 /* An unused equivalence member; make a symbol and a symtree
2429 if (in_load_equiv && p->u.rsym.symtree == NULL)
2431 /* Since this is not used, it must have a unique name. */
2432 p->u.rsym.symtree = gfc_get_unique_symtree (gfc_current_ns);
2434 /* Make the symbol. */
2435 if (p->u.rsym.sym == NULL)
2437 p->u.rsym.sym = gfc_new_symbol (p->u.rsym.true_name,
2439 p->u.rsym.sym->module = gfc_get_string (p->u.rsym.module);
2442 p->u.rsym.symtree->n.sym = p->u.rsym.sym;
2443 p->u.rsym.symtree->n.sym->refs++;
2444 p->u.rsym.referenced = 1;
2446 /* If the symbol is PRIVATE and in COMMON, load_commons will
2447 generate a fixup symbol, which must be associated. */
2449 resolve_fixups (p->fixup, p->u.rsym.sym);
2453 if (p->type == P_UNKNOWN)
2456 if (p->u.rsym.state == UNUSED)
2457 p->u.rsym.state = NEEDED;
2459 if (p->u.rsym.symtree != NULL)
2461 *stp = p->u.rsym.symtree;
2465 f = XCNEW (fixup_t);
2467 f->next = p->u.rsym.stfixup;
2468 p->u.rsym.stfixup = f;
2470 f->pointer = (void **) stp;
2477 mio_iterator (gfc_iterator **ip)
2483 if (iomode == IO_OUTPUT)
2490 if (peek_atom () == ATOM_RPAREN)
2496 *ip = gfc_get_iterator ();
2501 mio_expr (&iter->var);
2502 mio_expr (&iter->start);
2503 mio_expr (&iter->end);
2504 mio_expr (&iter->step);
2512 mio_constructor (gfc_constructor **cp)
2514 gfc_constructor *c, *tail;
2518 if (iomode == IO_OUTPUT)
2520 for (c = *cp; c; c = c->next)
2523 mio_expr (&c->expr);
2524 mio_iterator (&c->iterator);
2533 while (peek_atom () != ATOM_RPAREN)
2535 c = gfc_get_constructor ();
2545 mio_expr (&c->expr);
2546 mio_iterator (&c->iterator);
2555 static const mstring ref_types[] = {
2556 minit ("ARRAY", REF_ARRAY),
2557 minit ("COMPONENT", REF_COMPONENT),
2558 minit ("SUBSTRING", REF_SUBSTRING),
2564 mio_ref (gfc_ref **rp)
2571 r->type = MIO_NAME (ref_type) (r->type, ref_types);
2576 mio_array_ref (&r->u.ar);
2580 mio_symbol_ref (&r->u.c.sym);
2581 mio_component_ref (&r->u.c.component, r->u.c.sym);
2585 mio_expr (&r->u.ss.start);
2586 mio_expr (&r->u.ss.end);
2587 mio_charlen (&r->u.ss.length);
2596 mio_ref_list (gfc_ref **rp)
2598 gfc_ref *ref, *head, *tail;
2602 if (iomode == IO_OUTPUT)
2604 for (ref = *rp; ref; ref = ref->next)
2611 while (peek_atom () != ATOM_RPAREN)
2614 head = tail = gfc_get_ref ();
2617 tail->next = gfc_get_ref ();
2631 /* Read and write an integer value. */
2634 mio_gmp_integer (mpz_t *integer)
2638 if (iomode == IO_INPUT)
2640 if (parse_atom () != ATOM_STRING)
2641 bad_module ("Expected integer string");
2643 mpz_init (*integer);
2644 if (mpz_set_str (*integer, atom_string, 10))
2645 bad_module ("Error converting integer");
2647 gfc_free (atom_string);
2651 p = mpz_get_str (NULL, 10, *integer);
2652 write_atom (ATOM_STRING, p);
2659 mio_gmp_real (mpfr_t *real)
2664 if (iomode == IO_INPUT)
2666 if (parse_atom () != ATOM_STRING)
2667 bad_module ("Expected real string");
2670 mpfr_set_str (*real, atom_string, 16, GFC_RND_MODE);
2671 gfc_free (atom_string);
2675 p = mpfr_get_str (NULL, &exponent, 16, 0, *real, GFC_RND_MODE);
2677 if (mpfr_nan_p (*real) || mpfr_inf_p (*real))
2679 write_atom (ATOM_STRING, p);
2684 atom_string = XCNEWVEC (char, strlen (p) + 20);
2686 sprintf (atom_string, "0.%s@%ld", p, exponent);
2688 /* Fix negative numbers. */
2689 if (atom_string[2] == '-')
2691 atom_string[0] = '-';
2692 atom_string[1] = '0';
2693 atom_string[2] = '.';
2696 write_atom (ATOM_STRING, atom_string);
2698 gfc_free (atom_string);
2704 /* Save and restore the shape of an array constructor. */
2707 mio_shape (mpz_t **pshape, int rank)
2713 /* A NULL shape is represented by (). */
2716 if (iomode == IO_OUTPUT)
2728 if (t == ATOM_RPAREN)
2735 shape = gfc_get_shape (rank);
2739 for (n = 0; n < rank; n++)
2740 mio_gmp_integer (&shape[n]);
2746 static const mstring expr_types[] = {
2747 minit ("OP", EXPR_OP),
2748 minit ("FUNCTION", EXPR_FUNCTION),
2749 minit ("CONSTANT", EXPR_CONSTANT),
2750 minit ("VARIABLE", EXPR_VARIABLE),
2751 minit ("SUBSTRING", EXPR_SUBSTRING),
2752 minit ("STRUCTURE", EXPR_STRUCTURE),
2753 minit ("ARRAY", EXPR_ARRAY),
2754 minit ("NULL", EXPR_NULL),
2758 /* INTRINSIC_ASSIGN is missing because it is used as an index for
2759 generic operators, not in expressions. INTRINSIC_USER is also
2760 replaced by the correct function name by the time we see it. */
2762 static const mstring intrinsics[] =
2764 minit ("UPLUS", INTRINSIC_UPLUS),
2765 minit ("UMINUS", INTRINSIC_UMINUS),
2766 minit ("PLUS", INTRINSIC_PLUS),
2767 minit ("MINUS", INTRINSIC_MINUS),
2768 minit ("TIMES", INTRINSIC_TIMES),
2769 minit ("DIVIDE", INTRINSIC_DIVIDE),
2770 minit ("POWER", INTRINSIC_POWER),
2771 minit ("CONCAT", INTRINSIC_CONCAT),
2772 minit ("AND", INTRINSIC_AND),
2773 minit ("OR", INTRINSIC_OR),
2774 minit ("EQV", INTRINSIC_EQV),
2775 minit ("NEQV", INTRINSIC_NEQV),
2776 minit ("EQ_SIGN", INTRINSIC_EQ),
2777 minit ("EQ", INTRINSIC_EQ_OS),
2778 minit ("NE_SIGN", INTRINSIC_NE),
2779 minit ("NE", INTRINSIC_NE_OS),
2780 minit ("GT_SIGN", INTRINSIC_GT),
2781 minit ("GT", INTRINSIC_GT_OS),
2782 minit ("GE_SIGN", INTRINSIC_GE),
2783 minit ("GE", INTRINSIC_GE_OS),
2784 minit ("LT_SIGN", INTRINSIC_LT),
2785 minit ("LT", INTRINSIC_LT_OS),
2786 minit ("LE_SIGN", INTRINSIC_LE),
2787 minit ("LE", INTRINSIC_LE_OS),
2788 minit ("NOT", INTRINSIC_NOT),
2789 minit ("PARENTHESES", INTRINSIC_PARENTHESES),
2794 /* Remedy a couple of situations where the gfc_expr's can be defective. */
2797 fix_mio_expr (gfc_expr *e)
2799 gfc_symtree *ns_st = NULL;
2802 if (iomode != IO_OUTPUT)
2807 /* If this is a symtree for a symbol that came from a contained module
2808 namespace, it has a unique name and we should look in the current
2809 namespace to see if the required, non-contained symbol is available
2810 yet. If so, the latter should be written. */
2811 if (e->symtree->n.sym && check_unique_name (e->symtree->name))
2812 ns_st = gfc_find_symtree (gfc_current_ns->sym_root,
2813 e->symtree->n.sym->name);
2815 /* On the other hand, if the existing symbol is the module name or the
2816 new symbol is a dummy argument, do not do the promotion. */
2817 if (ns_st && ns_st->n.sym
2818 && ns_st->n.sym->attr.flavor != FL_MODULE
2819 && !e->symtree->n.sym->attr.dummy)
2822 else if (e->expr_type == EXPR_FUNCTION && e->value.function.name)
2824 /* In some circumstances, a function used in an initialization
2825 expression, in one use associated module, can fail to be
2826 coupled to its symtree when used in a specification
2827 expression in another module. */
2828 fname = e->value.function.esym ? e->value.function.esym->name
2829 : e->value.function.isym->name;
2830 e->symtree = gfc_find_symtree (gfc_current_ns->sym_root, fname);
2835 /* Read and write expressions. The form "()" is allowed to indicate a
2839 mio_expr (gfc_expr **ep)
2847 if (iomode == IO_OUTPUT)
2856 MIO_NAME (expr_t) (e->expr_type, expr_types);
2861 if (t == ATOM_RPAREN)
2868 bad_module ("Expected expression type");
2870 e = *ep = gfc_get_expr ();
2871 e->where = gfc_current_locus;
2872 e->expr_type = (expr_t) find_enum (expr_types);
2875 mio_typespec (&e->ts);
2876 mio_integer (&e->rank);
2880 switch (e->expr_type)
2884 = MIO_NAME (gfc_intrinsic_op) (e->value.op.op, intrinsics);
2886 switch (e->value.op.op)
2888 case INTRINSIC_UPLUS:
2889 case INTRINSIC_UMINUS:
2891 case INTRINSIC_PARENTHESES:
2892 mio_expr (&e->value.op.op1);
2895 case INTRINSIC_PLUS:
2896 case INTRINSIC_MINUS:
2897 case INTRINSIC_TIMES:
2898 case INTRINSIC_DIVIDE:
2899 case INTRINSIC_POWER:
2900 case INTRINSIC_CONCAT:
2904 case INTRINSIC_NEQV:
2906 case INTRINSIC_EQ_OS:
2908 case INTRINSIC_NE_OS:
2910 case INTRINSIC_GT_OS:
2912 case INTRINSIC_GE_OS:
2914 case INTRINSIC_LT_OS:
2916 case INTRINSIC_LE_OS:
2917 mio_expr (&e->value.op.op1);
2918 mio_expr (&e->value.op.op2);
2922 bad_module ("Bad operator");
2928 mio_symtree_ref (&e->symtree);
2929 mio_actual_arglist (&e->value.function.actual);
2931 if (iomode == IO_OUTPUT)
2933 e->value.function.name
2934 = mio_allocated_string (e->value.function.name);
2935 flag = e->value.function.esym != NULL;
2936 mio_integer (&flag);
2938 mio_symbol_ref (&e->value.function.esym);
2940 write_atom (ATOM_STRING, e->value.function.isym->name);
2944 require_atom (ATOM_STRING);
2945 e->value.function.name = gfc_get_string (atom_string);
2946 gfc_free (atom_string);
2948 mio_integer (&flag);
2950 mio_symbol_ref (&e->value.function.esym);
2953 require_atom (ATOM_STRING);
2954 e->value.function.isym = gfc_find_function (atom_string);
2955 gfc_free (atom_string);
2962 mio_symtree_ref (&e->symtree);
2963 mio_ref_list (&e->ref);
2966 case EXPR_SUBSTRING:
2967 e->value.character.string
2968 = CONST_CAST (gfc_char_t *,
2969 mio_allocated_wide_string (e->value.character.string,
2970 e->value.character.length));
2971 mio_ref_list (&e->ref);
2974 case EXPR_STRUCTURE:
2976 mio_constructor (&e->value.constructor);
2977 mio_shape (&e->shape, e->rank);
2984 mio_gmp_integer (&e->value.integer);
2988 gfc_set_model_kind (e->ts.kind);
2989 mio_gmp_real (&e->value.real);
2993 gfc_set_model_kind (e->ts.kind);
2994 mio_gmp_real (&e->value.complex.r);
2995 mio_gmp_real (&e->value.complex.i);
2999 mio_integer (&e->value.logical);
3003 mio_integer (&e->value.character.length);
3004 e->value.character.string
3005 = CONST_CAST (gfc_char_t *,
3006 mio_allocated_wide_string (e->value.character.string,
3007 e->value.character.length));
3011 bad_module ("Bad type in constant expression");
3024 /* Read and write namelists. */
3027 mio_namelist (gfc_symbol *sym)
3029 gfc_namelist *n, *m;
3030 const char *check_name;
3034 if (iomode == IO_OUTPUT)
3036 for (n = sym->namelist; n; n = n->next)
3037 mio_symbol_ref (&n->sym);
3041 /* This departure from the standard is flagged as an error.
3042 It does, in fact, work correctly. TODO: Allow it
3044 if (sym->attr.flavor == FL_NAMELIST)
3046 check_name = find_use_name (sym->name, false);
3047 if (check_name && strcmp (check_name, sym->name) != 0)
3048 gfc_error ("Namelist %s cannot be renamed by USE "
3049 "association to %s", sym->name, check_name);
3053 while (peek_atom () != ATOM_RPAREN)
3055 n = gfc_get_namelist ();
3056 mio_symbol_ref (&n->sym);
3058 if (sym->namelist == NULL)
3065 sym->namelist_tail = m;
3072 /* Save/restore lists of gfc_interface structures. When loading an
3073 interface, we are really appending to the existing list of
3074 interfaces. Checking for duplicate and ambiguous interfaces has to
3075 be done later when all symbols have been loaded. */
3078 mio_interface_rest (gfc_interface **ip)
3080 gfc_interface *tail, *p;
3081 pointer_info *pi = NULL;
3083 if (iomode == IO_OUTPUT)
3086 for (p = *ip; p; p = p->next)
3087 mio_symbol_ref (&p->sym);
3102 if (peek_atom () == ATOM_RPAREN)
3105 p = gfc_get_interface ();
3106 p->where = gfc_current_locus;
3107 pi = mio_symbol_ref (&p->sym);
3123 /* Save/restore a nameless operator interface. */
3126 mio_interface (gfc_interface **ip)
3129 mio_interface_rest (ip);
3133 /* Save/restore a named operator interface. */
3136 mio_symbol_interface (const char **name, const char **module,
3140 mio_pool_string (name);
3141 mio_pool_string (module);
3142 mio_interface_rest (ip);
3147 mio_namespace_ref (gfc_namespace **nsp)
3152 p = mio_pointer_ref (nsp);
3154 if (p->type == P_UNKNOWN)
3155 p->type = P_NAMESPACE;
3157 if (iomode == IO_INPUT && p->integer != 0)
3159 ns = (gfc_namespace *) p->u.pointer;
3162 ns = gfc_get_namespace (NULL, 0);
3163 associate_integer_pointer (p, ns);
3171 /* Save/restore the f2k_derived namespace of a derived-type symbol. */
3174 mio_finalizer (gfc_finalizer **f)
3176 if (iomode == IO_OUTPUT)
3179 gcc_assert ((*f)->proc_tree); /* Should already be resolved. */
3180 mio_symtree_ref (&(*f)->proc_tree);
3184 *f = gfc_get_finalizer ();
3185 (*f)->where = gfc_current_locus; /* Value should not matter. */
3188 mio_symtree_ref (&(*f)->proc_tree);
3189 (*f)->proc_sym = NULL;
3194 mio_f2k_derived (gfc_namespace *f2k)
3196 /* Handle the list of finalizer procedures. */
3198 if (iomode == IO_OUTPUT)
3201 for (f = f2k->finalizers; f; f = f->next)
3206 f2k->finalizers = NULL;
3207 while (peek_atom () != ATOM_RPAREN)
3210 mio_finalizer (&cur);
3211 cur->next = f2k->finalizers;
3212 f2k->finalizers = cur;
3219 mio_full_f2k_derived (gfc_symbol *sym)
3223 if (iomode == IO_OUTPUT)
3225 if (sym->f2k_derived)
3226 mio_f2k_derived (sym->f2k_derived);
3230 if (peek_atom () != ATOM_RPAREN)
3232 sym->f2k_derived = gfc_get_namespace (NULL, 0);
3233 mio_f2k_derived (sym->f2k_derived);
3236 gcc_assert (!sym->f2k_derived);
3243 /* Unlike most other routines, the address of the symbol node is already
3244 fixed on input and the name/module has already been filled in. */
3247 mio_symbol (gfc_symbol *sym)
3249 int intmod = INTMOD_NONE;
3251 gfc_formal_arglist *formal;
3255 mio_symbol_attribute (&sym->attr);
3256 mio_typespec (&sym->ts);
3258 /* Contained procedures don't have formal namespaces. Instead we output the
3259 procedure namespace. The will contain the formal arguments. */
3260 if (iomode == IO_OUTPUT)
3262 formal = sym->formal;
3263 while (formal && !formal->sym)
3264 formal = formal->next;
3267 mio_namespace_ref (&formal->sym->ns);
3269 mio_namespace_ref (&sym->formal_ns);
3273 mio_namespace_ref (&sym->formal_ns);
3276 sym->formal_ns->proc_name = sym;
3281 /* Save/restore common block links. */
3282 mio_symbol_ref (&sym->common_next);
3284 mio_formal_arglist (sym);
3286 if (sym->attr.flavor == FL_PARAMETER)
3287 mio_expr (&sym->value);
3289 mio_array_spec (&sym->as);
3291 mio_symbol_ref (&sym->result);
3293 if (sym->attr.cray_pointee)
3294 mio_symbol_ref (&sym->cp_pointer);
3296 /* Note that components are always saved, even if they are supposed
3297 to be private. Component access is checked during searching. */
3299 mio_component_list (&sym->components);
3301 if (sym->components != NULL)
3302 sym->component_access
3303 = MIO_NAME (gfc_access) (sym->component_access, access_types);
3305 /* Load/save the f2k_derived namespace of a derived-type symbol. */
3306 mio_full_f2k_derived (sym);
3310 /* Add the fields that say whether this is from an intrinsic module,
3311 and if so, what symbol it is within the module. */
3312 /* mio_integer (&(sym->from_intmod)); */
3313 if (iomode == IO_OUTPUT)
3315 intmod = sym->from_intmod;
3316 mio_integer (&intmod);
3320 mio_integer (&intmod);
3321 sym->from_intmod = intmod;
3324 mio_integer (&(sym->intmod_sym_id));
3330 /************************* Top level subroutines *************************/
3332 /* Given a root symtree node and a symbol, try to find a symtree that
3333 references the symbol that is not a unique name. */
3335 static gfc_symtree *
3336 find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
3338 gfc_symtree *s = NULL;
3343 s = find_symtree_for_symbol (st->right, sym);
3346 s = find_symtree_for_symbol (st->left, sym);
3350 if (st->n.sym == sym && !check_unique_name (st->name))
3357 /* A recursive function to look for a specific symbol by name and by
3358 module. Whilst several symtrees might point to one symbol, its
3359 is sufficient for the purposes here than one exist. Note that
3360 generic interfaces are distinguished as are symbols that have been
3361 renamed in another module. */
3362 static gfc_symtree *
3363 find_symbol (gfc_symtree *st, const char *name,
3364 const char *module, int generic)
3367 gfc_symtree *retval, *s;
3369 if (st == NULL || st->n.sym == NULL)
3372 c = strcmp (name, st->n.sym->name);
3373 if (c == 0 && st->n.sym->module
3374 && strcmp (module, st->n.sym->module) == 0
3375 && !check_unique_name (st->name))
3377 s = gfc_find_symtree (gfc_current_ns->sym_root, name);
3379 /* Detect symbols that are renamed by use association in another
3380 module by the absence of a symtree and null attr.use_rename,
3381 since the latter is not transmitted in the module file. */
3382 if (((!generic && !st->n.sym->attr.generic)
3383 || (generic && st->n.sym->attr.generic))
3384 && !(s == NULL && !st->n.sym->attr.use_rename))
3388 retval = find_symbol (st->left, name, module, generic);
3391 retval = find_symbol (st->right, name, module, generic);
3397 /* Skip a list between balanced left and right parens. */
3407 switch (parse_atom ())
3418 gfc_free (atom_string);
3430 /* Load operator interfaces from the module. Interfaces are unusual
3431 in that they attach themselves to existing symbols. */
3434 load_operator_interfaces (void)
3437 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3439 pointer_info *pi = NULL;
3444 while (peek_atom () != ATOM_RPAREN)
3448 mio_internal_string (name);
3449 mio_internal_string (module);
3451 n = number_use_names (name, true);
3454 for (i = 1; i <= n; i++)
3456 /* Decide if we need to load this one or not. */
3457 p = find_use_name_n (name, &i, true);
3461 while (parse_atom () != ATOM_RPAREN);
3467 uop = gfc_get_uop (p);
3468 pi = mio_interface_rest (&uop->op);
3472 if (gfc_find_uop (p, NULL))
3474 uop = gfc_get_uop (p);
3475 uop->op = gfc_get_interface ();
3476 uop->op->where = gfc_current_locus;
3477 add_fixup (pi->integer, &uop->op->sym);
3486 /* Load interfaces from the module. Interfaces are unusual in that
3487 they attach themselves to existing symbols. */
3490 load_generic_interfaces (void)
3493 char name[GFC_MAX_SYMBOL_LEN + 1], module[GFC_MAX_SYMBOL_LEN + 1];
3495 gfc_interface *generic = NULL;
3500 while (peek_atom () != ATOM_RPAREN)
3504 mio_internal_string (name);
3505 mio_internal_string (module);
3507 n = number_use_names (name, false);
3508 renamed = n ? 1 : 0;
3511 for (i = 1; i <= n; i++)
3514 /* Decide if we need to load this one or not. */
3515 p = find_use_name_n (name, &i, false);
3517 st = find_symbol (gfc_current_ns->sym_root,
3518 name, module_name, 1);
3520 if (!p || gfc_find_symbol (p, NULL, 0, &sym))
3522 /* Skip the specific names for these cases. */
3523 while (i == 1 && parse_atom () != ATOM_RPAREN);
3528 /* If the symbol exists already and is being USEd without being
3529 in an ONLY clause, do not load a new symtree(11.3.2). */
3530 if (!only_flag && st)
3535 /* Make the symbol inaccessible if it has been added by a USE
3536 statement without an ONLY(11.3.2). */
3538 && !st->n.sym->attr.use_only
3539 && !st->n.sym->attr.use_rename
3540 && strcmp (st->n.sym->module, module_name) == 0)
3543 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3544 st = gfc_get_unique_symtree (gfc_current_ns);
3551 if (strcmp (st->name, p) != 0)
3553 st = gfc_new_symtree (&gfc_current_ns->sym_root, p);
3559 /* Since we haven't found a valid generic interface, we had
3563 gfc_get_symbol (p, NULL, &sym);
3564 sym->name = gfc_get_string (name);
3565 sym->module = gfc_get_string (module_name);
3566 sym->attr.flavor = FL_PROCEDURE;
3567 sym->attr.generic = 1;
3568 sym->attr.use_assoc = 1;
3573 /* Unless sym is a generic interface, this reference
3576 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3580 if (st && !sym->attr.generic
3582 && strcmp(module, sym->module))
3586 sym->attr.use_only = only_flag;
3587 sym->attr.use_rename = renamed;
3591 mio_interface_rest (&sym->generic);
3592 generic = sym->generic;
3594 else if (!sym->generic)
3596 sym->generic = generic;
3597 sym->attr.generic_copy = 1;
3606 /* Load common blocks. */
3611 char name[GFC_MAX_SYMBOL_LEN + 1];
3616 while (peek_atom () != ATOM_RPAREN)
3620 mio_internal_string (name);
3622 p = gfc_get_common (name, 1);
3624 mio_symbol_ref (&p->head);
3625 mio_integer (&flags);
3629 p->threadprivate = 1;
3632 /* Get whether this was a bind(c) common or not. */
3633 mio_integer (&p->is_bind_c);
3634 /* Get the binding label. */
3635 mio_internal_string (p->binding_label);
3644 /* Load equivalences. The flag in_load_equiv informs mio_expr_ref of this
3645 so that unused variables are not loaded and so that the expression can
3651 gfc_equiv *head, *tail, *end, *eq;
3655 in_load_equiv = true;
3657 end = gfc_current_ns->equiv;
3658 while (end != NULL && end->next != NULL)
3661 while (peek_atom () != ATOM_RPAREN) {
3665 while(peek_atom () != ATOM_RPAREN)
3668 head = tail = gfc_get_equiv ();
3671 tail->eq = gfc_get_equiv ();
3675 mio_pool_string (&tail->module);
3676 mio_expr (&tail->expr);
3679 /* Unused equivalence members have a unique name. */
3681 for (eq = head; eq; eq = eq->eq)
3683 if (!check_unique_name (eq->expr->symtree->name))
3692 for (eq = head; eq; eq = head)
3695 gfc_free_expr (eq->expr);
3701 gfc_current_ns->equiv = head;
3712 in_load_equiv = false;
3716 /* Recursive function to traverse the pointer_info tree and load a
3717 needed symbol. We return nonzero if we load a symbol and stop the
3718 traversal, because the act of loading can alter the tree. */
3721 load_needed (pointer_info *p)
3732 rv |= load_needed (p->left);
3733 rv |= load_needed (p->right);
3735 if (p->type != P_SYMBOL || p->u.rsym.state != NEEDED)
3738 p->u.rsym.state = USED;
3740 set_module_locus (&p->u.rsym.where);
3742 sym = p->u.rsym.sym;
3745 q = get_integer (p->u.rsym.ns);
3747 ns = (gfc_namespace *) q->u.pointer;
3750 /* Create an interface namespace if necessary. These are
3751 the namespaces that hold the formal parameters of module
3754 ns = gfc_get_namespace (NULL, 0);
3755 associate_integer_pointer (q, ns);
3758 /* Use the module sym as 'proc_name' so that gfc_get_symbol_decl
3759 doesn't go pear-shaped if the symbol is used. */
3761 gfc_find_symbol (p->u.rsym.module, gfc_current_ns,
3764 sym = gfc_new_symbol (p->u.rsym.true_name, ns);
3765 sym->module = gfc_get_string (p->u.rsym.module);
3766 strcpy (sym->binding_label, p->u.rsym.binding_label);
3768 associate_integer_pointer (p, sym);
3772 sym->attr.use_assoc = 1;
3774 sym->attr.use_only = 1;
3775 if (p->u.rsym.renamed)
3776 sym->attr.use_rename = 1;
3782 /* Recursive function for cleaning up things after a module has been read. */
3785 read_cleanup (pointer_info *p)
3793 read_cleanup (p->left);
3794 read_cleanup (p->right);
3796 if (p->type == P_SYMBOL && p->u.rsym.state == USED && !p->u.rsym.referenced)
3798 /* Add hidden symbols to the symtree. */
3799 q = get_integer (p->u.rsym.ns);
3800 st = gfc_get_unique_symtree ((gfc_namespace *) q->u.pointer);
3802 st->n.sym = p->u.rsym.sym;
3805 /* Fixup any symtree references. */
3806 p->u.rsym.symtree = st;
3807 resolve_fixups (p->u.rsym.stfixup, st);
3808 p->u.rsym.stfixup = NULL;
3811 /* Free unused symbols. */
3812 if (p->type == P_SYMBOL && p->u.rsym.state == UNUSED)
3813 gfc_free_symbol (p->u.rsym.sym);
3817 /* Read a module file. */
3822 module_locus operator_interfaces, user_operators;
3824 char name[GFC_MAX_SYMBOL_LEN + 1];
3826 int ambiguous, j, nuse, symbol;
3827 pointer_info *info, *q;
3832 get_module_locus (&operator_interfaces); /* Skip these for now. */
3835 get_module_locus (&user_operators);
3839 /* Skip commons and equivalences for now. */
3845 /* Create the fixup nodes for all the symbols. */
3847 while (peek_atom () != ATOM_RPAREN)
3849 require_atom (ATOM_INTEGER);
3850 info = get_integer (atom_int);
3852 info->type = P_SYMBOL;
3853 info->u.rsym.state = UNUSED;
3855 mio_internal_string (info->u.rsym.true_name);
3856 mio_internal_string (info->u.rsym.module);
3857 mio_internal_string (info->u.rsym.binding_label);
3860 require_atom (ATOM_INTEGER);
3861 info->u.rsym.ns = atom_int;
3863 get_module_locus (&info->u.rsym.where);
3866 /* See if the symbol has already been loaded by a previous module.
3867 If so, we reference the existing symbol and prevent it from
3868 being loaded again. This should not happen if the symbol being
3869 read is an index for an assumed shape dummy array (ns != 1). */
3871 sym = find_true_name (info->u.rsym.true_name, info->u.rsym.module);
3874 || (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
3877 info->u.rsym.state = USED;
3878 info->u.rsym.sym = sym;
3880 /* Some symbols do not have a namespace (eg. formal arguments),
3881 so the automatic "unique symtree" mechanism must be suppressed
3882 by marking them as referenced. */
3883 q = get_integer (info->u.rsym.ns);
3884 if (q->u.pointer == NULL)
3886 info->u.rsym.referenced = 1;
3890 /* If possible recycle the symtree that references the symbol.
3891 If a symtree is not found and the module does not import one,
3892 a unique-name symtree is found by read_cleanup. */
3893 st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
3896 info->u.rsym.symtree = st;
3897 info->u.rsym.referenced = 1;
3903 /* Parse the symtree lists. This lets us mark which symbols need to
3904 be loaded. Renaming is also done at this point by replacing the
3909 while (peek_atom () != ATOM_RPAREN)
3911 mio_internal_string (name);
3912 mio_integer (&ambiguous);
3913 mio_integer (&symbol);
3915 info = get_integer (symbol);
3917 /* See how many use names there are. If none, go through the start
3918 of the loop at least once. */
3919 nuse = number_use_names (name, false);
3920 info->u.rsym.renamed = nuse ? 1 : 0;
3925 for (j = 1; j <= nuse; j++)
3927 /* Get the jth local name for this symbol. */
3928 p = find_use_name_n (name, &j, false);
3930 if (p == NULL && strcmp (name, module_name) == 0)
3933 /* Skip symtree nodes not in an ONLY clause, unless there
3934 is an existing symtree loaded from another USE statement. */
3937 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
3939 info->u.rsym.symtree = st;
3943 /* If a symbol of the same name and module exists already,
3944 this symbol, which is not in an ONLY clause, must not be
3945 added to the namespace(11.3.2). Note that find_symbol
3946 only returns the first occurrence that it finds. */
3947 if (!only_flag && !info->u.rsym.renamed
3948 && strcmp (name, module_name) != 0
3949 && find_symbol (gfc_current_ns->sym_root, name,
3953 st = gfc_find_symtree (gfc_current_ns->sym_root, p);
3957 /* Check for ambiguous symbols. */
3958 if (st->n.sym != info->u.rsym.sym)
3960 info->u.rsym.symtree = st;
3964 st = gfc_find_symtree (gfc_current_ns->sym_root, name);
3966 /* Delete the symtree if the symbol has been added by a USE
3967 statement without an ONLY(11.3.2). Remember that the rsym
3968 will be the same as the symbol found in the symtree, for
3970 if (st && (only_flag || info->u.rsym.renamed)
3971 && !st->n.sym->attr.use_only
3972 && !st->n.sym->attr.use_rename
3973 && info->u.rsym.sym == st->n.sym)
3974 gfc_delete_symtree (&gfc_current_ns->sym_root, name);
3976 /* Create a symtree node in the current namespace for this
3978 st = check_unique_name (p)
3979 ? gfc_get_unique_symtree (gfc_current_ns)
3980 : gfc_new_symtree (&gfc_current_ns->sym_root, p);
3981 st->ambiguous = ambiguous;
3983 sym = info->u.rsym.sym;
3985 /* Create a symbol node if it doesn't already exist. */
3988 info->u.rsym.sym = gfc_new_symbol (info->u.rsym.true_name,
3990 sym = info->u.rsym.sym;
3991 sym->module = gfc_get_string (info->u.rsym.module);
3993 /* TODO: hmm, can we test this? Do we know it will be
3994 initialized to zeros? */
3995 if (info->u.rsym.binding_label[0] != '\0')
3996 strcpy (sym->binding_label, info->u.rsym.binding_label);
4002 if (strcmp (name, p) != 0)
4003 sym->attr.use_rename = 1;
4005 /* Store the symtree pointing to this symbol. */
4006 info->u.rsym.symtree = st;
4008 if (info->u.rsym.state == UNUSED)
4009 info->u.rsym.state = NEEDED;
4010 info->u.rsym.referenced = 1;
4017 /* Load intrinsic operator interfaces. */
4018 set_module_locus (&operator_interfaces);
4021 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4023 if (i == INTRINSIC_USER)
4028 u = find_use_operator (i);
4039 mio_interface (&gfc_current_ns->op[i]);
4044 /* Load generic and user operator interfaces. These must follow the
4045 loading of symtree because otherwise symbols can be marked as
4048 set_module_locus (&user_operators);
4050 load_operator_interfaces ();
4051 load_generic_interfaces ();
4056 /* At this point, we read those symbols that are needed but haven't
4057 been loaded yet. If one symbol requires another, the other gets
4058 marked as NEEDED if its previous state was UNUSED. */
4060 while (load_needed (pi_root));
4062 /* Make sure all elements of the rename-list were found in the module. */
4064 for (u = gfc_rename_list; u; u = u->next)
4069 if (u->op == INTRINSIC_NONE)
4071 gfc_error ("Symbol '%s' referenced at %L not found in module '%s'",
4072 u->use_name, &u->where, module_name);
4076 if (u->op == INTRINSIC_USER)
4078 gfc_error ("User operator '%s' referenced at %L not found "
4079 "in module '%s'", u->use_name, &u->where, module_name);
4083 gfc_error ("Intrinsic operator '%s' referenced at %L not found "
4084 "in module '%s'", gfc_op2string (u->op), &u->where,
4088 gfc_check_interfaces (gfc_current_ns);
4090 /* Clean up symbol nodes that were never loaded, create references
4091 to hidden symbols. */
4093 read_cleanup (pi_root);
4097 /* Given an access type that is specific to an entity and the default
4098 access, return nonzero if the entity is publicly accessible. If the
4099 element is declared as PUBLIC, then it is public; if declared
4100 PRIVATE, then private, and otherwise it is public unless the default
4101 access in this context has been declared PRIVATE. */
4104 gfc_check_access (gfc_access specific_access, gfc_access default_access)
4106 if (specific_access == ACCESS_PUBLIC)
4108 if (specific_access == ACCESS_PRIVATE)
4111 if (gfc_option.flag_module_private)
4112 return default_access == ACCESS_PUBLIC;
4114 return default_access != ACCESS_PRIVATE;
4118 /* A structure to remember which commons we've already written. */
4120 struct written_common
4122 BBT_HEADER(written_common);
4123 const char *name, *label;
4126 static struct written_common *written_commons = NULL;
4128 /* Comparison function used for balancing the binary tree. */
4131 compare_written_commons (void *a1, void *b1)
4133 const char *aname = ((struct written_common *) a1)->name;
4134 const char *alabel = ((struct written_common *) a1)->label;
4135 const char *bname = ((struct written_common *) b1)->name;
4136 const char *blabel = ((struct written_common *) b1)->label;
4137 int c = strcmp (aname, bname);
4139 return (c != 0 ? c : strcmp (alabel, blabel));
4142 /* Free a list of written commons. */
4145 free_written_common (struct written_common *w)
4151 free_written_common (w->left);
4153 free_written_common (w->right);
4158 /* Write a common block to the module -- recursive helper function. */
4161 write_common_0 (gfc_symtree *st)
4167 struct written_common *w;
4168 bool write_me = true;
4173 write_common_0 (st->left);
4175 /* We will write out the binding label, or the name if no label given. */
4176 name = st->n.common->name;
4178 label = p->is_bind_c ? p->binding_label : p->name;
4180 /* Check if we've already output this common. */
4181 w = written_commons;
4184 int c = strcmp (name, w->name);
4185 c = (c != 0 ? c : strcmp (label, w->label));
4189 w = (c < 0) ? w->left : w->right;
4194 /* Write the common to the module. */
4196 mio_pool_string (&name);
4198 mio_symbol_ref (&p->head);
4199 flags = p->saved ? 1 : 0;
4200 if (p->threadprivate)
4202 mio_integer (&flags);
4204 /* Write out whether the common block is bind(c) or not. */
4205 mio_integer (&(p->is_bind_c));
4207 mio_pool_string (&label);
4210 /* Record that we have written this common. */
4211 w = XCNEW (struct written_common);
4214 gfc_insert_bbt (&written_commons, w, compare_written_commons);
4217 write_common_0 (st->right);
4221 /* Write a common, by initializing the list of written commons, calling
4222 the recursive function write_common_0() and cleaning up afterwards. */
4225 write_common (gfc_symtree *st)
4227 written_commons = NULL;
4228 write_common_0 (st);
4229 free_written_common (written_commons);
4230 written_commons = NULL;
4234 /* Write the blank common block to the module. */
4237 write_blank_common (void)
4239 const char * name = BLANK_COMMON_NAME;
4241 /* TODO: Blank commons are not bind(c). The F2003 standard probably says
4242 this, but it hasn't been checked. Just making it so for now. */
4245 if (gfc_current_ns->blank_common.head == NULL)
4250 mio_pool_string (&name);
4252 mio_symbol_ref (&gfc_current_ns->blank_common.head);
4253 saved = gfc_current_ns->blank_common.saved;
4254 mio_integer (&saved);
4256 /* Write out whether the common block is bind(c) or not. */
4257 mio_integer (&is_bind_c);
4259 /* Write out the binding label, which is BLANK_COMMON_NAME, though
4260 it doesn't matter because the label isn't used. */
4261 mio_pool_string (&name);
4267 /* Write equivalences to the module. */
4276 for (eq = gfc_current_ns->equiv; eq; eq = eq->next)
4280 for (e = eq; e; e = e->eq)
4282 if (e->module == NULL)
4283 e->module = gfc_get_string ("%s.eq.%d", module_name, num);
4284 mio_allocated_string (e->module);
4285 mio_expr (&e->expr);
4294 /* Write a symbol to the module. */
4297 write_symbol (int n, gfc_symbol *sym)
4301 if (sym->attr.flavor == FL_UNKNOWN || sym->attr.flavor == FL_LABEL)
4302 gfc_internal_error ("write_symbol(): bad module symbol '%s'", sym->name);
4305 mio_pool_string (&sym->name);
4307 mio_pool_string (&sym->module);
4308 if (sym->attr.is_bind_c || sym->attr.is_iso_c)
4310 label = sym->binding_label;
4311 mio_pool_string (&label);
4314 mio_pool_string (&sym->name);
4316 mio_pointer_ref (&sym->ns);
4323 /* Recursive traversal function to write the initial set of symbols to
4324 the module. We check to see if the symbol should be written
4325 according to the access specification. */
4328 write_symbol0 (gfc_symtree *st)
4332 bool dont_write = false;
4337 write_symbol0 (st->left);
4340 if (sym->module == NULL)
4341 sym->module = gfc_get_string (module_name);
4343 if (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4344 && !sym->attr.subroutine && !sym->attr.function)
4347 if (!gfc_check_access (sym->attr.access, sym->ns->default_access))
4352 p = get_pointer (sym);
4353 if (p->type == P_UNKNOWN)
4356 if (p->u.wsym.state != WRITTEN)
4358 write_symbol (p->integer, sym);
4359 p->u.wsym.state = WRITTEN;
4363 write_symbol0 (st->right);
4367 /* Recursive traversal function to write the secondary set of symbols
4368 to the module file. These are symbols that were not public yet are
4369 needed by the public symbols or another dependent symbol. The act
4370 of writing a symbol can modify the pointer_info tree, so we cease
4371 traversal if we find a symbol to write. We return nonzero if a
4372 symbol was written and pass that information upwards. */
4375 write_symbol1 (pointer_info *p)
4382 result = write_symbol1 (p->left);
4384 if (!(p->type != P_SYMBOL || p->u.wsym.state != NEEDS_WRITE))
4386 p->u.wsym.state = WRITTEN;
4387 write_symbol (p->integer, p->u.wsym.sym);
4391 result |= write_symbol1 (p->right);
4396 /* Write operator interfaces associated with a symbol. */
4399 write_operator (gfc_user_op *uop)
4401 static char nullstring[] = "";
4402 const char *p = nullstring;
4405 || !gfc_check_access (uop->access, uop->ns->default_access))
4408 mio_symbol_interface (&uop->name, &p, &uop->op);
4412 /* Write generic interfaces from the namespace sym_root. */
4415 write_generic (gfc_symtree *st)
4422 write_generic (st->left);
4423 write_generic (st->right);
4426 if (!sym || check_unique_name (st->name))
4429 if (sym->generic == NULL
4430 || !gfc_check_access (sym->attr.access, sym->ns->default_access))
4433 if (sym->module == NULL)
4434 sym->module = gfc_get_string (module_name);
4436 mio_symbol_interface (&st->name, &sym->module, &sym->generic);
4441 write_symtree (gfc_symtree *st)
4447 if (!gfc_check_access (sym->attr.access, sym->ns->default_access)
4448 || (sym->attr.flavor == FL_PROCEDURE && sym->attr.generic
4449 && !sym->attr.subroutine && !sym->attr.function))
4452 if (check_unique_name (st->name))
4455 p = find_pointer (sym);
4457 gfc_internal_error ("write_symtree(): Symbol not written");
4459 mio_pool_string (&st->name);
4460 mio_integer (&st->ambiguous);
4461 mio_integer (&p->integer);
4470 /* Write the operator interfaces. */
4473 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4475 if (i == INTRINSIC_USER)
4478 mio_interface (gfc_check_access (gfc_current_ns->operator_access[i],
4479 gfc_current_ns->default_access)
4480 ? &gfc_current_ns->op[i] : NULL);
4488 gfc_traverse_user_op (gfc_current_ns, write_operator);
4494 write_generic (gfc_current_ns->sym_root);
4500 write_blank_common ();
4501 write_common (gfc_current_ns->common_root);
4512 /* Write symbol information. First we traverse all symbols in the
4513 primary namespace, writing those that need to be written.
4514 Sometimes writing one symbol will cause another to need to be
4515 written. A list of these symbols ends up on the write stack, and
4516 we end by popping the bottom of the stack and writing the symbol
4517 until the stack is empty. */
4521 write_symbol0 (gfc_current_ns->sym_root);
4522 while (write_symbol1 (pi_root))
4531 gfc_traverse_symtree (gfc_current_ns->sym_root, write_symtree);
4536 /* Read a MD5 sum from the header of a module file. If the file cannot
4537 be opened, or we have any other error, we return -1. */
4540 read_md5_from_module_file (const char * filename, unsigned char md5[16])
4546 /* Open the file. */
4547 if ((file = fopen (filename, "r")) == NULL)
4550 /* Read two lines. */
4551 if (fgets (buf, sizeof (buf) - 1, file) == NULL
4552 || fgets (buf, sizeof (buf) - 1, file) == NULL)
4558 /* Close the file. */
4561 /* If the header is not what we expect, or is too short, bail out. */
4562 if (strncmp (buf, "MD5:", 4) != 0 || strlen (buf) < 4 + 16)
4565 /* Now, we have a real MD5, read it into the array. */
4566 for (n = 0; n < 16; n++)
4570 if (sscanf (&(buf[4+2*n]), "%02x", &x) != 1)
4580 /* Given module, dump it to disk. If there was an error while
4581 processing the module, dump_flag will be set to zero and we delete
4582 the module file, even if it was already there. */
4585 gfc_dump_module (const char *name, int dump_flag)
4588 char *filename, *filename_tmp, *p;
4591 unsigned char md5_new[16], md5_old[16];
4593 n = strlen (name) + strlen (MODULE_EXTENSION) + 1;
4594 if (gfc_option.module_dir != NULL)
4596 n += strlen (gfc_option.module_dir);
4597 filename = (char *) alloca (n);
4598 strcpy (filename, gfc_option.module_dir);
4599 strcat (filename, name);
4603 filename = (char *) alloca (n);
4604 strcpy (filename, name);
4606 strcat (filename, MODULE_EXTENSION);
4608 /* Name of the temporary file used to write the module. */
4609 filename_tmp = (char *) alloca (n + 1);
4610 strcpy (filename_tmp, filename);
4611 strcat (filename_tmp, "0");
4613 /* There was an error while processing the module. We delete the
4614 module file, even if it was already there. */
4621 /* Write the module to the temporary file. */
4622 module_fp = fopen (filename_tmp, "w");
4623 if (module_fp == NULL)
4624 gfc_fatal_error ("Can't open module file '%s' for writing at %C: %s",
4625 filename_tmp, strerror (errno));
4627 /* Write the header, including space reserved for the MD5 sum. */
4631 *strchr (p, '\n') = '\0';
4633 fprintf (module_fp, "GFORTRAN module created from %s on %s\nMD5:",
4634 gfc_source_file, p);
4635 fgetpos (module_fp, &md5_pos);
4636 fputs ("00000000000000000000000000000000 -- "
4637 "If you edit this, you'll get what you deserve.\n\n", module_fp);
4639 /* Initialize the MD5 context that will be used for output. */
4640 md5_init_ctx (&ctx);
4642 /* Write the module itself. */
4644 strcpy (module_name, name);
4650 free_pi_tree (pi_root);
4655 /* Write the MD5 sum to the header of the module file. */
4656 md5_finish_ctx (&ctx, md5_new);
4657 fsetpos (module_fp, &md5_pos);
4658 for (n = 0; n < 16; n++)
4659 fprintf (module_fp, "%02x", md5_new[n]);
4661 if (fclose (module_fp))
4662 gfc_fatal_error ("Error writing module file '%s' for writing: %s",
4663 filename_tmp, strerror (errno));
4665 /* Read the MD5 from the header of the old module file and compare. */
4666 if (read_md5_from_module_file (filename, md5_old) != 0
4667 || memcmp (md5_old, md5_new, sizeof (md5_old)) != 0)
4669 /* Module file have changed, replace the old one. */
4671 rename (filename_tmp, filename);
4674 unlink (filename_tmp);
4679 sort_iso_c_rename_list (void)
4681 gfc_use_rename *tmp_list = NULL;
4682 gfc_use_rename *curr;
4683 gfc_use_rename *kinds_used[ISOCBINDING_NUMBER] = {NULL};
4687 for (curr = gfc_rename_list; curr; curr = curr->next)
4689 c_kind = get_c_kind (curr->use_name, c_interop_kinds_table);
4690 if (c_kind == ISOCBINDING_INVALID || c_kind == ISOCBINDING_LAST)
4692 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4693 "intrinsic module ISO_C_BINDING.", curr->use_name,
4697 /* Put it in the list. */
4698 kinds_used[c_kind] = curr;
4701 /* Make a new (sorted) rename list. */
4703 while (i < ISOCBINDING_NUMBER && kinds_used[i] == NULL)
4706 if (i < ISOCBINDING_NUMBER)
4708 tmp_list = kinds_used[i];
4712 for (; i < ISOCBINDING_NUMBER; i++)
4713 if (kinds_used[i] != NULL)
4715 curr->next = kinds_used[i];
4721 gfc_rename_list = tmp_list;
4725 /* Import the intrinsic ISO_C_BINDING module, generating symbols in
4726 the current namespace for all named constants, pointer types, and
4727 procedures in the module unless the only clause was used or a rename
4728 list was provided. */
4731 import_iso_c_binding_module (void)
4733 gfc_symbol *mod_sym = NULL;
4734 gfc_symtree *mod_symtree = NULL;
4735 const char *iso_c_module_name = "__iso_c_binding";
4740 /* Look only in the current namespace. */
4741 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, iso_c_module_name);
4743 if (mod_symtree == NULL)
4745 /* symtree doesn't already exist in current namespace. */
4746 gfc_get_sym_tree (iso_c_module_name, gfc_current_ns, &mod_symtree);
4748 if (mod_symtree != NULL)
4749 mod_sym = mod_symtree->n.sym;
4751 gfc_internal_error ("import_iso_c_binding_module(): Unable to "
4752 "create symbol for %s", iso_c_module_name);
4754 mod_sym->attr.flavor = FL_MODULE;
4755 mod_sym->attr.intrinsic = 1;
4756 mod_sym->module = gfc_get_string (iso_c_module_name);
4757 mod_sym->from_intmod = INTMOD_ISO_C_BINDING;
4760 /* Generate the symbols for the named constants representing
4761 the kinds for intrinsic data types. */
4764 /* Sort the rename list because there are dependencies between types
4765 and procedures (e.g., c_loc needs c_ptr). */
4766 sort_iso_c_rename_list ();
4768 for (u = gfc_rename_list; u; u = u->next)
4770 i = get_c_kind (u->use_name, c_interop_kinds_table);
4772 if (i == ISOCBINDING_INVALID || i == ISOCBINDING_LAST)
4774 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4775 "intrinsic module ISO_C_BINDING.", u->use_name,
4780 generate_isocbinding_symbol (iso_c_module_name, i, u->local_name);
4785 for (i = 0; i < ISOCBINDING_NUMBER; i++)
4788 for (u = gfc_rename_list; u; u = u->next)
4790 if (strcmp (c_interop_kinds_table[i].name, u->use_name) == 0)
4792 local_name = u->local_name;
4797 generate_isocbinding_symbol (iso_c_module_name, i, local_name);
4800 for (u = gfc_rename_list; u; u = u->next)
4805 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
4806 "module ISO_C_BINDING", u->use_name, &u->where);
4812 /* Add an integer named constant from a given module. */
4815 create_int_parameter (const char *name, int value, const char *modname,
4816 intmod_id module, int id)
4818 gfc_symtree *tmp_symtree;
4821 tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
4822 if (tmp_symtree != NULL)
4824 if (strcmp (modname, tmp_symtree->n.sym->module) == 0)
4827 gfc_error ("Symbol '%s' already declared", name);
4830 gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree);
4831 sym = tmp_symtree->n.sym;
4833 sym->module = gfc_get_string (modname);
4834 sym->attr.flavor = FL_PARAMETER;
4835 sym->ts.type = BT_INTEGER;
4836 sym->ts.kind = gfc_default_integer_kind;
4837 sym->value = gfc_int_expr (value);
4838 sym->attr.use_assoc = 1;
4839 sym->from_intmod = module;
4840 sym->intmod_sym_id = id;
4844 /* USE the ISO_FORTRAN_ENV intrinsic module. */
4847 use_iso_fortran_env_module (void)
4849 static char mod[] = "iso_fortran_env";
4850 const char *local_name;
4852 gfc_symbol *mod_sym;
4853 gfc_symtree *mod_symtree;
4856 intmod_sym symbol[] = {
4857 #define NAMED_INTCST(a,b,c,d) { a, b, 0, d },
4858 #include "iso-fortran-env.def"
4860 { ISOFORTRANENV_INVALID, NULL, -1234, 0 } };
4863 #define NAMED_INTCST(a,b,c,d) symbol[i++].value = c;
4864 #include "iso-fortran-env.def"
4867 /* Generate the symbol for the module itself. */
4868 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, mod);
4869 if (mod_symtree == NULL)
4871 gfc_get_sym_tree (mod, gfc_current_ns, &mod_symtree);
4872 gcc_assert (mod_symtree);
4873 mod_sym = mod_symtree->n.sym;
4875 mod_sym->attr.flavor = FL_MODULE;
4876 mod_sym->attr.intrinsic = 1;
4877 mod_sym->module = gfc_get_string (mod);
4878 mod_sym->from_intmod = INTMOD_ISO_FORTRAN_ENV;
4881 if (!mod_symtree->n.sym->attr.intrinsic)
4882 gfc_error ("Use of intrinsic module '%s' at %C conflicts with "
4883 "non-intrinsic module name used previously", mod);
4885 /* Generate the symbols for the module integer named constants. */
4887 for (u = gfc_rename_list; u; u = u->next)
4889 for (i = 0; symbol[i].name; i++)
4890 if (strcmp (symbol[i].name, u->use_name) == 0)
4893 if (symbol[i].name == NULL)
4895 gfc_error ("Symbol '%s' referenced at %L does not exist in "
4896 "intrinsic module ISO_FORTRAN_ENV", u->use_name,
4901 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
4902 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
4903 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
4904 "from intrinsic module ISO_FORTRAN_ENV at %L is "
4905 "incompatible with option %s", &u->where,
4906 gfc_option.flag_default_integer
4907 ? "-fdefault-integer-8" : "-fdefault-real-8");
4909 create_int_parameter (u->local_name[0] ? u->local_name
4911 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
4916 for (i = 0; symbol[i].name; i++)
4919 for (u = gfc_rename_list; u; u = u->next)
4921 if (strcmp (symbol[i].name, u->use_name) == 0)
4923 local_name = u->local_name;
4929 if ((gfc_option.flag_default_integer || gfc_option.flag_default_real)
4930 && symbol[i].id == ISOFORTRANENV_NUMERIC_STORAGE_SIZE)
4931 gfc_warning_now ("Use of the NUMERIC_STORAGE_SIZE named constant "
4932 "from intrinsic module ISO_FORTRAN_ENV at %C is "
4933 "incompatible with option %s",
4934 gfc_option.flag_default_integer
4935 ? "-fdefault-integer-8" : "-fdefault-real-8");
4937 create_int_parameter (local_name ? local_name : symbol[i].name,
4938 symbol[i].value, mod, INTMOD_ISO_FORTRAN_ENV,
4942 for (u = gfc_rename_list; u; u = u->next)
4947 gfc_error ("Symbol '%s' referenced at %L not found in intrinsic "
4948 "module ISO_FORTRAN_ENV", u->use_name, &u->where);
4954 /* Process a USE directive. */
4957 gfc_use_module (void)
4962 gfc_symtree *mod_symtree;
4964 filename = (char *) alloca (strlen (module_name) + strlen (MODULE_EXTENSION)
4966 strcpy (filename, module_name);
4967 strcat (filename, MODULE_EXTENSION);
4969 /* First, try to find an non-intrinsic module, unless the USE statement
4970 specified that the module is intrinsic. */
4973 module_fp = gfc_open_included_file (filename, true, true);
4975 /* Then, see if it's an intrinsic one, unless the USE statement
4976 specified that the module is non-intrinsic. */
4977 if (module_fp == NULL && !specified_nonint)
4979 if (strcmp (module_name, "iso_fortran_env") == 0
4980 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ISO_FORTRAN_ENV "
4981 "intrinsic module at %C") != FAILURE)
4983 use_iso_fortran_env_module ();
4987 if (strcmp (module_name, "iso_c_binding") == 0
4988 && gfc_notify_std (GFC_STD_F2003, "Fortran 2003: "
4989 "ISO_C_BINDING module at %C") != FAILURE)
4991 import_iso_c_binding_module();
4995 module_fp = gfc_open_intrinsic_module (filename);
4997 if (module_fp == NULL && specified_int)
4998 gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
5002 if (module_fp == NULL)
5003 gfc_fatal_error ("Can't open module file '%s' for reading at %C: %s",
5004 filename, strerror (errno));
5006 /* Check that we haven't already USEd an intrinsic module with the
5009 mod_symtree = gfc_find_symtree (gfc_current_ns->sym_root, module_name);
5010 if (mod_symtree && mod_symtree->n.sym->attr.intrinsic)
5011 gfc_error ("Use of non-intrinsic module '%s' at %C conflicts with "
5012 "intrinsic module name used previously", module_name);
5019 /* Skip the first two lines of the module, after checking that this is
5020 a gfortran module file. */
5026 bad_module ("Unexpected end of module");
5029 if ((start == 1 && strcmp (atom_name, "GFORTRAN") != 0)
5030 || (start == 2 && strcmp (atom_name, " module") != 0))
5031 gfc_fatal_error ("File '%s' opened at %C is not a GFORTRAN module "
5038 /* Make sure we're not reading the same module that we may be building. */
5039 for (p = gfc_state_stack; p; p = p->previous)
5040 if (p->state == COMP_MODULE && strcmp (p->sym->name, module_name) == 0)
5041 gfc_fatal_error ("Can't USE the same module we're building!");
5044 init_true_name_tree ();
5048 free_true_name (true_name_root);
5049 true_name_root = NULL;
5051 free_pi_tree (pi_root);
5059 gfc_module_init_2 (void)
5061 last_atom = ATOM_LPAREN;
5066 gfc_module_done_2 (void)