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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/hyreach/mf_lex.c,v 1.5 2002/01/30 00:51:04 dtashley Exp $
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**
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** This module defines functions which are related to lexically
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** analyzing the HyReach model input file.
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*/
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//--------------------------------------------------------------------------------
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//Copyright 2001 David T. Ashley
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//-------------------------------------------------------------------------------------------------
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//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
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//PUBLIC LICENSE, Version 3, full license text below.
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//-------------------------------------------------------------------------------------------------
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|
412 |
//additional terms that apply to those files, or a notice indicating
|
413 |
//where to find the applicable terms.
|
414 |
//
|
415 |
// Additional terms, permissive or non-permissive, may be stated in the
|
416 |
//form of a separately written license, or stated as exceptions;
|
417 |
//the above requirements apply either way.
|
418 |
//
|
419 |
// 8. Termination.
|
420 |
//
|
421 |
// You may not propagate or modify a covered work except as expressly
|
422 |
//provided under this License. Any attempt otherwise to propagate or
|
423 |
//modify it is void, and will automatically terminate your rights under
|
424 |
//this License (including any patent licenses granted under the third
|
425 |
//paragraph of section 11).
|
426 |
//
|
427 |
// However, if you cease all violation of this License, then your
|
428 |
//license from a particular copyright holder is reinstated (a)
|
429 |
//provisionally, unless and until the copyright holder explicitly and
|
430 |
//finally terminates your license, and (b) permanently, if the copyright
|
431 |
//holder fails to notify you of the violation by some reasonable means
|
432 |
//prior to 60 days after the cessation.
|
433 |
//
|
434 |
// Moreover, your license from a particular copyright holder is
|
435 |
//reinstated permanently if the copyright holder notifies you of the
|
436 |
//violation by some reasonable means, this is the first time you have
|
437 |
//received notice of violation of this License (for any work) from that
|
438 |
//copyright holder, and you cure the violation prior to 30 days after
|
439 |
//your receipt of the notice.
|
440 |
//
|
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// Termination of your rights under this section does not terminate the
|
442 |
//licenses of parties who have received copies or rights from you under
|
443 |
//this License. If your rights have been terminated and not permanently
|
444 |
//reinstated, you do not qualify to receive new licenses for the same
|
445 |
//material under section 10.
|
446 |
//
|
447 |
// 9. Acceptance Not Required for Having Copies.
|
448 |
//
|
449 |
// You are not required to accept this License in order to receive or
|
450 |
//run a copy of the Program. Ancillary propagation of a covered work
|
451 |
//occurring solely as a consequence of using peer-to-peer transmission
|
452 |
//to receive a copy likewise does not require acceptance. However,
|
453 |
//nothing other than this License grants you permission to propagate or
|
454 |
//modify any covered work. These actions infringe copyright if you do
|
455 |
//not accept this License. Therefore, by modifying or propagating a
|
456 |
//covered work, you indicate your acceptance of this License to do so.
|
457 |
//
|
458 |
// 10. Automatic Licensing of Downstream Recipients.
|
459 |
//
|
460 |
// Each time you convey a covered work, the recipient automatically
|
461 |
//receives a license from the original licensors, to run, modify and
|
462 |
//propagate that work, subject to this License. You are not responsible
|
463 |
//for enforcing compliance by third parties with this License.
|
464 |
//
|
465 |
// An "entity transaction" is a transaction transferring control of an
|
466 |
//organization, or substantially all assets of one, or subdividing an
|
467 |
//organization, or merging organizations. If propagation of a covered
|
468 |
//work results from an entity transaction, each party to that
|
469 |
//transaction who receives a copy of the work also receives whatever
|
470 |
//licenses to the work the party's predecessor in interest had or could
|
471 |
//give under the previous paragraph, plus a right to possession of the
|
472 |
//Corresponding Source of the work from the predecessor in interest, if
|
473 |
//the predecessor has it or can get it with reasonable efforts.
|
474 |
//
|
475 |
// You may not impose any further restrictions on the exercise of the
|
476 |
//rights granted or affirmed under this License. For example, you may
|
477 |
//not impose a license fee, royalty, or other charge for exercise of
|
478 |
//rights granted under this License, and you may not initiate litigation
|
479 |
//(including a cross-claim or counterclaim in a lawsuit) alleging that
|
480 |
//any patent claim is infringed by making, using, selling, offering for
|
481 |
//sale, or importing the Program or any portion of it.
|
482 |
//
|
483 |
// 11. Patents.
|
484 |
//
|
485 |
// A "contributor" is a copyright holder who authorizes use under this
|
486 |
//License of the Program or a work on which the Program is based. The
|
487 |
//work thus licensed is called the contributor's "contributor version".
|
488 |
//
|
489 |
// A contributor's "essential patent claims" are all patent claims
|
490 |
//owned or controlled by the contributor, whether already acquired or
|
491 |
//hereafter acquired, that would be infringed by some manner, permitted
|
492 |
//by this License, of making, using, or selling its contributor version,
|
493 |
//but do not include claims that would be infringed only as a
|
494 |
//consequence of further modification of the contributor version. For
|
495 |
//purposes of this definition, "control" includes the right to grant
|
496 |
//patent sublicenses in a manner consistent with the requirements of
|
497 |
//this License.
|
498 |
//
|
499 |
// Each contributor grants you a non-exclusive, worldwide, royalty-free
|
500 |
//patent license under the contributor's essential patent claims, to
|
501 |
//make, use, sell, offer for sale, import and otherwise run, modify and
|
502 |
//propagate the contents of its contributor version.
|
503 |
//
|
504 |
// In the following three paragraphs, a "patent license" is any express
|
505 |
//agreement or commitment, however denominated, not to enforce a patent
|
506 |
//(such as an express permission to practice a patent or covenant not to
|
507 |
//sue for patent infringement). To "grant" such a patent license to a
|
508 |
//party means to make such an agreement or commitment not to enforce a
|
509 |
//patent against the party.
|
510 |
//
|
511 |
// If you convey a covered work, knowingly relying on a patent license,
|
512 |
//and the Corresponding Source of the work is not available for anyone
|
513 |
//to copy, free of charge and under the terms of this License, through a
|
514 |
//publicly available network server or other readily accessible means,
|
515 |
//then you must either (1) cause the Corresponding Source to be so
|
516 |
//available, or (2) arrange to deprive yourself of the benefit of the
|
517 |
//patent license for this particular work, or (3) arrange, in a manner
|
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//consistent with the requirements of this License, to extend the patent
|
519 |
//license to downstream recipients. "Knowingly relying" means you have
|
520 |
//actual knowledge that, but for the patent license, your conveying the
|
521 |
//covered work in a country, or your recipient's use of the covered work
|
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//in a country, would infringe one or more identifiable patents in that
|
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//country that you have reason to believe are valid.
|
524 |
//
|
525 |
// If, pursuant to or in connection with a single transaction or
|
526 |
//arrangement, you convey, or propagate by procuring conveyance of, a
|
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//covered work, and grant a patent license to some of the parties
|
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//receiving the covered work authorizing them to use, propagate, modify
|
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|
530 |
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|
531 |
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|
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//
|
533 |
// A patent license is "discriminatory" if it does not include within
|
534 |
//the scope of its coverage, prohibits the exercise of, or is
|
535 |
//conditioned on the non-exercise of one or more of the rights that are
|
536 |
//specifically granted under this License. You may not convey a covered
|
537 |
//work if you are a party to an arrangement with a third party that is
|
538 |
//in the business of distributing software, under which you make payment
|
539 |
//to the third party based on the extent of your activity of conveying
|
540 |
//the work, and under which the third party grants, to any of the
|
541 |
//parties who would receive the covered work from you, a discriminatory
|
542 |
//patent license (a) in connection with copies of the covered work
|
543 |
//conveyed by you (or copies made from those copies), or (b) primarily
|
544 |
//for and in connection with specific products or compilations that
|
545 |
//contain the covered work, unless you entered into that arrangement,
|
546 |
//or that patent license was granted, prior to 28 March 2007.
|
547 |
//
|
548 |
// Nothing in this License shall be construed as excluding or limiting
|
549 |
//any implied license or other defenses to infringement that may
|
550 |
//otherwise be available to you under applicable patent law.
|
551 |
//
|
552 |
// 12. No Surrender of Others' Freedom.
|
553 |
//
|
554 |
// If conditions are imposed on you (whether by court order, agreement or
|
555 |
//otherwise) that contradict the conditions of this License, they do not
|
556 |
//excuse you from the conditions of this License. If you cannot convey a
|
557 |
//covered work so as to satisfy simultaneously your obligations under this
|
558 |
//License and any other pertinent obligations, then as a consequence you may
|
559 |
//not convey it at all. For example, if you agree to terms that obligate you
|
560 |
//to collect a royalty for further conveying from those to whom you convey
|
561 |
//the Program, the only way you could satisfy both those terms and this
|
562 |
//License would be to refrain entirely from conveying the Program.
|
563 |
//
|
564 |
// 13. Use with the GNU Affero General Public License.
|
565 |
//
|
566 |
// Notwithstanding any other provision of this License, you have
|
567 |
//permission to link or combine any covered work with a work licensed
|
568 |
//under version 3 of the GNU Affero General Public License into a single
|
569 |
//combined work, and to convey the resulting work. The terms of this
|
570 |
//License will continue to apply to the part which is the covered work,
|
571 |
//but the special requirements of the GNU Affero General Public License,
|
572 |
//section 13, concerning interaction through a network will apply to the
|
573 |
//combination as such.
|
574 |
//
|
575 |
// 14. Revised Versions of this License.
|
576 |
//
|
577 |
// The Free Software Foundation may publish revised and/or new versions of
|
578 |
//the GNU General Public License from time to time. Such new versions will
|
579 |
//be similar in spirit to the present version, but may differ in detail to
|
580 |
//address new problems or concerns.
|
581 |
//
|
582 |
// Each version is given a distinguishing version number. If the
|
583 |
//Program specifies that a certain numbered version of the GNU General
|
584 |
//Public License "or any later version" applies to it, you have the
|
585 |
//option of following the terms and conditions either of that numbered
|
586 |
//version or of any later version published by the Free Software
|
587 |
//Foundation. If the Program does not specify a version number of the
|
588 |
//GNU General Public License, you may choose any version ever published
|
589 |
//by the Free Software Foundation.
|
590 |
//
|
591 |
// If the Program specifies that a proxy can decide which future
|
592 |
//versions of the GNU General Public License can be used, that proxy's
|
593 |
//public statement of acceptance of a version permanently authorizes you
|
594 |
//to choose that version for the Program.
|
595 |
//
|
596 |
// Later license versions may give you additional or different
|
597 |
//permissions. However, no additional obligations are imposed on any
|
598 |
//author or copyright holder as a result of your choosing to follow a
|
599 |
//later version.
|
600 |
//
|
601 |
// 15. Disclaimer of Warranty.
|
602 |
//
|
603 |
// THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
604 |
//APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
605 |
//HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
606 |
//OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
607 |
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
608 |
//PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
609 |
//IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
610 |
//ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
611 |
//
|
612 |
// 16. Limitation of Liability.
|
613 |
//
|
614 |
// IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
615 |
//WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
616 |
//THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
617 |
//GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
618 |
//USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
619 |
//DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
620 |
//PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
621 |
//EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
622 |
//SUCH DAMAGES.
|
623 |
//
|
624 |
// 17. Interpretation of Sections 15 and 16.
|
625 |
//
|
626 |
// If the disclaimer of warranty and limitation of liability provided
|
627 |
//above cannot be given local legal effect according to their terms,
|
628 |
//reviewing courts shall apply local law that most closely approximates
|
629 |
//an absolute waiver of all civil liability in connection with the
|
630 |
//Program, unless a warranty or assumption of liability accompanies a
|
631 |
//copy of the Program in return for a fee.
|
632 |
//
|
633 |
// END OF TERMS AND CONDITIONS
|
634 |
//
|
635 |
// How to Apply These Terms to Your New Programs
|
636 |
//
|
637 |
// If you develop a new program, and you want it to be of the greatest
|
638 |
//possible use to the public, the best way to achieve this is to make it
|
639 |
//free software which everyone can redistribute and change under these terms.
|
640 |
//
|
641 |
// To do so, attach the following notices to the program. It is safest
|
642 |
//to attach them to the start of each source file to most effectively
|
643 |
//state the exclusion of warranty; and each file should have at least
|
644 |
//the "copyright" line and a pointer to where the full notice is found.
|
645 |
//
|
646 |
// <one line to give the program's name and a brief idea of what it does.>
|
647 |
// Copyright (C) <year> <name of author>
|
648 |
//
|
649 |
// This program is free software: you can redistribute it and/or modify
|
650 |
// it under the terms of the GNU General Public License as published by
|
651 |
// the Free Software Foundation, either version 3 of the License, or
|
652 |
// (at your option) any later version.
|
653 |
//
|
654 |
// This program is distributed in the hope that it will be useful,
|
655 |
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
656 |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
657 |
// GNU General Public License for more details.
|
658 |
//
|
659 |
// You should have received a copy of the GNU General Public License
|
660 |
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
661 |
//
|
662 |
//Also add information on how to contact you by electronic and paper mail.
|
663 |
//
|
664 |
// If the program does terminal interaction, make it output a short
|
665 |
//notice like this when it starts in an interactive mode:
|
666 |
//
|
667 |
// <program> Copyright (C) <year> <name of author>
|
668 |
// This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
669 |
// This is free software, and you are welcome to redistribute it
|
670 |
// under certain conditions; type `show c' for details.
|
671 |
//
|
672 |
//The hypothetical commands `show w' and `show c' should show the appropriate
|
673 |
//parts of the General Public License. Of course, your program's commands
|
674 |
//might be different; for a GUI interface, you would use an "about box".
|
675 |
//
|
676 |
// You should also get your employer (if you work as a programmer) or school,
|
677 |
//if any, to sign a "copyright disclaimer" for the program, if necessary.
|
678 |
//For more information on this, and how to apply and follow the GNU GPL, see
|
679 |
//<http://www.gnu.org/licenses/>.
|
680 |
//
|
681 |
// The GNU General Public License does not permit incorporating your program
|
682 |
//into proprietary programs. If your program is a subroutine library, you
|
683 |
//may consider it more useful to permit linking proprietary applications with
|
684 |
//the library. If this is what you want to do, use the GNU Lesser General
|
685 |
//Public License instead of this License. But first, please read
|
686 |
//<http://www.gnu.org/philosophy/why-not-lgpl.html>.
|
687 |
//-------------------------------------------------------------------------------------------------
|
688 |
//--------------------------------------------------------------------------------
|
689 |
#define MODULE_MF_LEX
|
690 |
|
691 |
#include <assert.h>
|
692 |
#include <stdio.h>
|
693 |
|
694 |
#include "ccmalloc.h"
|
695 |
#include "mf_lex.h"
|
696 |
|
697 |
|
698 |
//This module implements a character-by-character parser which breaks the input file
|
699 |
//into tokens, allowing string literals to be quoted and allowing the standard 'C' and
|
700 |
//'C++' style of comments to be used. The major functionality implemented by this FSA
|
701 |
//parser is:
|
702 |
// (a)'C'-style comments may be used.
|
703 |
// (b)'C++'-style comments may be used.
|
704 |
// (c)The sequence \" may be used to embed a quote character in a token or string
|
705 |
// literal (this is the standard way of doing it in most programming languages).
|
706 |
// (d)The +" sequence may be used to start a string literal and to cause it to
|
707 |
// be concatenated with the previous token.
|
708 |
//
|
709 |
//There are lots of subtleties to the way that this parser operates (subtle behaviors),
|
710 |
//but these can be elicited by studying the state machine design. For example,
|
711 |
//'C++'-style comment delimiters within 'C' comments are ignored, and vice-versa.
|
712 |
//
|
713 |
//The documentation of the FSA parser is contained in the file (with relative path)
|
714 |
//docs/mf_lex/mf_lex_fsa_01.abc, which is an ABC-flowcharter document generated by
|
715 |
//ABC Flowcharter version 6.0a.
|
716 |
//
|
717 |
//Each state in the ABC Flowcharter document is named, and each transition is
|
718 |
//numbered. These states and [outgoing] transitions are described in detail below.
|
719 |
//
|
720 |
// START (initial state)
|
721 |
// The parser is in between tokens.
|
722 |
//
|
723 |
// Outgoing Transitions:
|
724 |
// [001]: Character is whitespace. Only column number advances.
|
725 |
// [002]: Character is LF. This is out-of-order for Windows systems, but
|
726 |
// standard for Unix systems. column number resets to 1 for new
|
727 |
// line, line counter advances to indicate new line.
|
728 |
// [003]: Is not any of the special characters, so is the start of a token.
|
729 |
// Set token to be this character, will perhaps append more chars
|
730 |
// later. Advance column number.
|
731 |
// [004]: Character is opening quote. Advance column number. Set token
|
732 |
// to the empty string, will probably add more characters to token
|
733 |
// later.
|
734 |
|
735 |
/* The allocation increment (in characters) for tokens in the list
|
736 |
** returned. This is a balance between efficiency and memory waste.
|
737 |
*/
|
738 |
#define MF_LEX_TOKEN_CHAR_ALLOC_INC (100)
|
739 |
|
740 |
/* The allocation increment (in tokens, in the token array). This is
|
741 |
** a static rather than a proportional hit, so there is no harm in
|
742 |
** going large here. The increment below (10000) grabs about 40K
|
743 |
** bytes at a time.
|
744 |
*/
|
745 |
#define MF_LEX_TOKEN_PTR_ALLOC_INC (10000)
|
746 |
|
747 |
|
748 |
unsigned MF_LEX_cclass(unsigned char arg)
|
749 |
{
|
750 |
unsigned rv = 0;
|
751 |
|
752 |
if (arg == 0)
|
753 |
{
|
754 |
rv = MF_LEX_CCLASS_TERMINATOR;
|
755 |
goto endpoint;
|
756 |
}
|
757 |
else if (arg >= 128)
|
758 |
{
|
759 |
rv = MF_LEX_CCLASS_ILLEGAL;
|
760 |
goto endpoint;
|
761 |
}
|
762 |
else
|
763 |
{
|
764 |
/* In this path, the character is legal to be in the source
|
765 |
** file. OR in all the right flags.
|
766 |
*/
|
767 |
|
768 |
if (arg == '\\')
|
769 |
{
|
770 |
rv |= MF_LEX_CCLASS_BACKSLASH;
|
771 |
}
|
772 |
|
773 |
if (arg == '\"')
|
774 |
{
|
775 |
rv |= MF_LEX_CCLASS_DOUBLE_QUOTE;
|
776 |
}
|
777 |
|
778 |
if (arg == ' ')
|
779 |
{
|
780 |
rv |= MF_LEX_CCLASS_SPACE;
|
781 |
}
|
782 |
|
783 |
if (arg == '\t')
|
784 |
{
|
785 |
rv |= MF_LEX_CCLASS_TAB;
|
786 |
}
|
787 |
|
788 |
if ((arg >= '0') && (arg <= '9'))
|
789 |
{
|
790 |
rv |= MF_LEX_CCLASS_DIGIT;
|
791 |
}
|
792 |
|
793 |
if ((arg >= 'a') && (arg <= 'z'))
|
794 |
{
|
795 |
rv |= MF_LEX_CCLASS_LC_LETTER;
|
796 |
}
|
797 |
|
798 |
if ((arg >= 'A') && (arg <= 'Z'))
|
799 |
{
|
800 |
rv |= MF_LEX_CCLASS_UC_LETTER;
|
801 |
}
|
802 |
|
803 |
/* A character which is legal but not
|
804 |
** whitespace can be defined recursively. It it were not
|
805 |
** legal, we would not be here, and whitespace (which is defined
|
806 |
** canonically as space or tab only) has already been calculated.
|
807 |
*/
|
808 |
if (rv & (MF_LEX_CCLASS_SPACE | MF_LEX_CCLASS_TAB))
|
809 |
{
|
810 |
rv |= MF_LEX_CCLASS_LEGAL_NON_WHITESPACE;
|
811 |
}
|
812 |
|
813 |
if (arg == '{')
|
814 |
{
|
815 |
rv |= MF_LEX_CCLASS_OPEN_BRACE;
|
816 |
}
|
817 |
|
818 |
if (arg == '}')
|
819 |
{
|
820 |
rv |= MF_LEX_CCLASS_CLOSE_BRACE;
|
821 |
}
|
822 |
|
823 |
if (arg == '/')
|
824 |
{
|
825 |
rv |= MF_LEX_CCLASS_SLASH;
|
826 |
}
|
827 |
|
828 |
if (arg == '*')
|
829 |
{
|
830 |
rv |= MF_LEX_CCLASS_ASTERISK;
|
831 |
}
|
832 |
|
833 |
if (arg == 13)
|
834 |
{
|
835 |
rv |= MF_LEX_CCLASS_CR;
|
836 |
}
|
837 |
|
838 |
if (arg == 10)
|
839 |
{
|
840 |
rv |= MF_LEX_CCLASS_LF;
|
841 |
}
|
842 |
}
|
843 |
|
844 |
endpoint:
|
845 |
return(rv);
|
846 |
}
|
847 |
|
848 |
|
849 |
void MF_LEX_parse(const char *fname,
|
850 |
unsigned *ntokens,
|
851 |
MF_LEX_TOKEN_PTR **tokens,
|
852 |
int *result_code)
|
853 |
{
|
854 |
FILE *mf_stream;
|
855 |
/* The model input file.
|
856 |
*/
|
857 |
int end_of_file;
|
858 |
/* TRUE if EOF found.
|
859 |
*/
|
860 |
int file_int;
|
861 |
/* The integer read from the file which might also be the EOF
|
862 |
** code.
|
863 |
*/
|
864 |
unsigned char file_char;
|
865 |
/* The character read from the file. This is only
|
866 |
** defined if EOF is not true.
|
867 |
*/
|
868 |
int parser_state;
|
869 |
/* The state of the parser, a discrete value.
|
870 |
*/
|
871 |
int exit_flag;
|
872 |
/* TRUE if something was encountered which should cause
|
873 |
** the parser to exit.
|
874 |
*/
|
875 |
int warnings_found;
|
876 |
/* TRUE if warnings were issued.
|
877 |
*/
|
878 |
int fatals_found;
|
879 |
/* TRUE if an error which should cause the program to
|
880 |
** abort because the model input file is
|
881 |
** essentially unusable.
|
882 |
*/
|
883 |
|
884 |
/* Eyeball the input parameters closely.
|
885 |
*/
|
886 |
assert(fname != NULL);
|
887 |
assert(ntokens != NULL);
|
888 |
assert(tokens != NULL);
|
889 |
assert(*tokens == NULL);
|
890 |
assert(result_code != NULL);
|
891 |
|
892 |
/* Set the pointer to the array of tokens NULL and the
|
893 |
** number of tokens to 0. This is in case we crap out on
|
894 |
** the file open--we need to have these set even in that case.
|
895 |
*/
|
896 |
*tokens = NULL;
|
897 |
*ntokens = 0;
|
898 |
|
899 |
/* Try to open the model input file for reading. We may die here.
|
900 |
*/
|
901 |
mf_stream = fopen(fname, "rb");
|
902 |
if (!mf_stream)
|
903 |
{
|
904 |
*result_code = MF_LEX_PARSE_RESULT_ERROR_FOPEN;
|
905 |
return;
|
906 |
}
|
907 |
|
908 |
/* Run the parser, which is a finite state machine arrangement.
|
909 |
** The documentation of the parser is in the file mf_lex_fsa_01.abc,
|
910 |
** a Micrografx ABC-Flowcharter document, which is also under version
|
911 |
** control. The documentation is slightly incomplete, but this is a
|
912 |
** very straightforward parser. Symbolic names and comments are
|
913 |
** taken from the ABC-Flowcharter document.
|
914 |
*/
|
915 |
end_of_file = 0;
|
916 |
file_char = 0;
|
917 |
parser_state = 0;
|
918 |
exit_flag = 0;
|
919 |
warnings_found = 0;
|
920 |
fatals_found = 0;
|
921 |
|
922 |
while (!exit_flag)
|
923 |
{
|
924 |
/* Grab the character, which might also be the EOF code.
|
925 |
*/
|
926 |
file_int = fgetc(mf_stream);
|
927 |
|
928 |
file_char = file_int;
|
929 |
|
930 |
/* If the EOF code is indicated, we must differentiate between an
|
931 |
** EOF and a read error. An EOF is normal and expected, but
|
932 |
** a read error must be treated differently.
|
933 |
*/
|
934 |
if (file_int == EOF)
|
935 |
{
|
936 |
if (feof(mf_stream))
|
937 |
{
|
938 |
/* EOF, which is normal and expected.
|
939 |
*/
|
940 |
end_of_file = 1;
|
941 |
}
|
942 |
else
|
943 |
{
|
944 |
/* Presumably a file read error, which is abnormal and necessarily
|
945 |
** fatal.
|
946 |
*/
|
947 |
|
948 |
}
|
949 |
} /* End if returned EOF */
|
950 |
|
951 |
/* As a temporary measure until get the parser into place, just terminate on EOF and
|
952 |
** return OK.
|
953 |
*/
|
954 |
|
955 |
if (file_int == EOF)
|
956 |
{
|
957 |
exit_flag = 1;
|
958 |
}
|
959 |
} /* End while() */
|
960 |
|
961 |
|
962 |
|
963 |
*result_code = MF_LEX_PARSE_RESULT_OK;
|
964 |
|
965 |
} /* End function */
|
966 |
|
967 |
|
968 |
void MF_LEX_token_list_destroy(
|
969 |
unsigned *ntokens,
|
970 |
MF_LEX_TOKEN_PTR **tokens)
|
971 |
{
|
972 |
unsigned i;
|
973 |
MF_LEX_TOKEN_PTR p;
|
974 |
|
975 |
/* Eyeball the input parameters. However, we don't want to check that the
|
976 |
** list of tokens is non-NULL unless the count is non-zero.
|
977 |
*/
|
978 |
assert(ntokens != NULL);
|
979 |
assert(tokens != NULL);
|
980 |
|
981 |
if (*ntokens)
|
982 |
{
|
983 |
/* The number of tokens is non-zero. In this case the pointer to the array of
|
984 |
** tokens may not be NULL.
|
985 |
*/
|
986 |
assert(*tokens != NULL);
|
987 |
|
988 |
/* For each token in the array.
|
989 |
*/
|
990 |
for (i=0; i<*ntokens; i++)
|
991 |
{
|
992 |
/* Get the pointer to the token. */
|
993 |
p = (*tokens)[i];
|
994 |
|
995 |
/* The token must have storage allocated. Even an empty string must have the
|
996 |
** zero terminator.
|
997 |
*/
|
998 |
assert(p->token != NULL);
|
999 |
|
1000 |
/* Free the token string storage. */
|
1001 |
CCMALLOC_free(p->token);
|
1002 |
|
1003 |
/* Free the space for the token structure itself. */
|
1004 |
CCMALLOC_free(p);
|
1005 |
}
|
1006 |
|
1007 |
/* Free up the array itself and set the pointer to NULL.
|
1008 |
*/
|
1009 |
CCMALLOC_free(*tokens);
|
1010 |
*tokens = NULL;
|
1011 |
}
|
1012 |
else
|
1013 |
{
|
1014 |
/* The array has no elements. In this case the pointer must be
|
1015 |
** NULL.
|
1016 |
*/
|
1017 |
assert(*tokens == NULL);
|
1018 |
}
|
1019 |
}
|
1020 |
|
1021 |
|
1022 |
const char *MF_LEX_cvcinfo(void)
|
1023 |
{
|
1024 |
return("$Header: /cvsroot/esrg/sfesrg/esrgpcpj/hyreach/mf_lex.c,v 1.5 2002/01/30 00:51:04 dtashley Exp $");
|
1025 |
}
|
1026 |
|
1027 |
|
1028 |
const char *MF_LEX_hvcinfo(void)
|
1029 |
{
|
1030 |
return(MF_LEX_H_VERSION);
|
1031 |
}
|
1032 |
|
1033 |
|
1034 |
/******************************************************************************
|
1035 |
** $Log: mf_lex.c,v $
|
1036 |
** Revision 1.5 2002/01/30 00:51:04 dtashley
|
1037 |
** Nightly safety checkin.
|
1038 |
**
|
1039 |
** Revision 1.4 2001/12/13 07:36:35 dtashley
|
1040 |
** Evening safety checkin.
|
1041 |
**
|
1042 |
** Revision 1.3 2001/12/07 05:06:33 dtashley
|
1043 |
** Evening safety checkin.
|
1044 |
**
|
1045 |
** Revision 1.2 2001/12/01 21:29:18 dtashley
|
1046 |
** Safety checkin after edits.
|
1047 |
**
|
1048 |
** Revision 1.1 2001/12/01 21:23:44 dtashley
|
1049 |
** Initial checkin.
|
1050 |
*******************************************************************************
|
1051 |
** End of MF_LEX.C. */
|