--- stack/stack.c 2002/03/07 01:21:07 1.90 +++ stack/stack.c 2002/03/07 03:28:29 1.91 @@ -1,3 +1,25 @@ +/* + stack - an interactive interpreter for a stack-based language + Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + Authors: Mats Alritzson + Teddy Hogeborn +*/ + /* printf, sscanf, fgets, fprintf, fopen, perror */ #include /* exit, EXIT_SUCCESS, malloc, free */ @@ -8,12 +30,16 @@ #include /* strcmp, strcpy, strlen, strcat, strdup */ #include -/* getopt, STDIN_FILENO, STDOUT_FILENO */ +/* getopt, STDIN_FILENO, STDOUT_FILENO, usleep */ #include /* EX_NOINPUT, EX_USAGE */ #include /* mtrace, muntrace */ #include +/* ioctl */ +#include +/* KDMKTONE */ +#include #include "stack.h" @@ -903,6 +929,14 @@ } } + if(myenv.interactive) { + printf("Stack version $Revision: 1.91 $\n\ +Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ +Stack comes with ABSOLUTELY NO WARRANTY; for details type `warranty;'.\n\ +This is free software, and you are welcome to redistribute it\n\ +under certain conditions; type `copying;' for details.\n"); + } + while(1) { if(myenv.in_string==NULL) { if (myenv.interactive) { @@ -917,7 +951,7 @@ } sx_72656164(&myenv); if (myenv.err==4) { - return EX_NOINPUT; + return EXIT_SUCCESS; /* EOF */ } else if(myenv.head!=NULL && myenv.head->item->type==symb && ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { @@ -1399,3 +1433,352 @@ if(depth) return sx_72656164(env); } + +extern void beep(environment *env) { + + int freq, dur, period, ticks; + + if((env->head)==NULL || env->head->next==NULL) { + printerr("Too Few Arguments"); + env->err=1; + return; + } + + if(env->head->item->type!=integer + || env->head->next->item->type!=integer) { + printerr("Bad Argument Type"); + env->err=2; + return; + } + + dur=env->head->item->content.val; + toss(env); + freq=env->head->item->content.val; + toss(env); + + period=1193180/freq; /* convert freq from Hz to period + length */ + ticks=dur*.001193180; /* convert duration from µseconds to + timer ticks */ + +/* ticks=dur/1000; */ + + /* if (ioctl(STDOUT_FILENO, KDMKTONE, (125<<16) + 0x637)==0) */ + switch (ioctl(STDOUT_FILENO, KDMKTONE, (ticks<<16) | period)){ + case 0: + usleep(dur); + return; + case -1: + perror("beep"); + env->err=5; + return; + default: + abort(); + } +}; + +/* "wait" */ +extern void sx_77616974(environment *env) { + + int dur; + + if((env->head)==NULL) { + printerr("Too Few Arguments"); + env->err=1; + return; + } + + if(env->head->item->type!=integer) { + printerr("Bad Argument Type"); + env->err=2; + return; + } + + dur=env->head->item->content.val; + toss(env); + + usleep(dur); +}; + +extern void copying(environment *env){ + printf("GNU GENERAL PUBLIC LICENSE\n\ + Version 2, June 1991\n\ +\n\ + Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\n\ + Everyone is permitted to copy and distribute verbatim copies\n\ + of this license document, but changing it is not allowed.\n\ +\n\ + Preamble\n\ +\n\ + The licenses for most software are designed to take away your\n\ +freedom to share and change it. By contrast, the GNU General Public\n\ +License is intended to guarantee your freedom to share and change free\n\ +software--to make sure the software is free for all its users. This\n\ +General Public License applies to most of the Free Software\n\ +Foundation's software and to any other program whose authors commit to\n\ +using it. (Some other Free Software Foundation software is covered by\n\ +the GNU Library General Public License instead.) You can apply it to\n\ +your programs, too.\n\ +\n\ + When we speak of free software, we are referring to freedom, not\n\ +price. Our General Public Licenses are designed to make sure that you\n\ +have the freedom to distribute copies of free software (and charge for\n\ +this service if you wish), that you receive source code or can get it\n\ +if you want it, that you can change the software or use pieces of it\n\ +in new free programs; and that you know you can do these things.\n\ +\n\ + To protect your rights, we need to make restrictions that forbid\n\ +anyone to deny you these rights or to ask you to surrender the rights.\n\ +These restrictions translate to certain responsibilities for you if you\n\ +distribute copies of the software, or if you modify it.\n\ +\n\ + For example, if you distribute copies of such a program, whether\n\ +gratis or for a fee, you must give the recipients all the rights that\n\ +you have. You must make sure that they, too, receive or can get the\n\ +source code. And you must show them these terms so they know their\n\ +rights.\n\ +\n\ + We protect your rights with two steps: (1) copyright the software, and\n\ +(2) offer you this license which gives you legal permission to copy,\n\ +distribute and/or modify the software.\n\ +\n\ + Also, for each author's protection and ours, we want to make certain\n\ +that everyone understands that there is no warranty for this free\n\ +software. If the software is modified by someone else and passed on, we\n\ +want its recipients to know that what they have is not the original, so\n\ +that any problems introduced by others will not reflect on the original\n\ +authors' reputations.\n\ +\n\ + Finally, any free program is threatened constantly by software\n\ +patents. We wish to avoid the danger that redistributors of a free\n\ +program will individually obtain patent licenses, in effect making the\n\ +program proprietary. To prevent this, we have made it clear that any\n\ +patent must be licensed for everyone's free use or not licensed at all.\n\ +\n\ + The precise terms and conditions for copying, distribution and\n\ +modification follow.\n\ +\n\ + GNU GENERAL PUBLIC LICENSE\n\ + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION\n\ +\n\ + 0. This License applies to any program or other work which contains\n\ +a notice placed by the copyright holder saying it may be distributed\n\ +under the terms of this General Public License. The \"Program\", below,\n\ +refers to any such program or work, and a \"work based on the Program\"\n\ +means either the Program or any derivative work under copyright law:\n\ +that is to say, a work containing the Program or a portion of it,\n\ +either verbatim or with modifications and/or translated into another\n\ +language. (Hereinafter, translation is included without limitation in\n\ +the term \"modification\".) Each licensee is addressed as \"you\".\n\ +\n\ +Activities other than copying, distribution and modification are not\n\ +covered by this License; they are outside its scope. The act of\n\ +running the Program is not restricted, and the output from the Program\n\ +is covered only if its contents constitute a work based on the\n\ +Program (independent of having been made by running the Program).\n\ +Whether that is true depends on what the Program does.\n\ +\n\ + 1. You may copy and distribute verbatim copies of the Program's\n\ +source code as you receive it, in any medium, provided that you\n\ +conspicuously and appropriately publish on each copy an appropriate\n\ +copyright notice and disclaimer of warranty; keep intact all the\n\ +notices that refer to this License and to the absence of any warranty;\n\ +and give any other recipients of the Program a copy of this License\n\ +along with the Program.\n\ +\n\ +You may charge a fee for the physical act of transferring a copy, and\n\ +you may at your option offer warranty protection in exchange for a fee.\n\ +\n\ + 2. You may modify your copy or copies of the Program or any portion\n\ +of it, thus forming a work based on the Program, and copy and\n\ +distribute such modifications or work under the terms of Section 1\n\ +above, provided that you also meet all of these conditions:\n\ +\n\ + a) You must cause the modified files to carry prominent notices\n\ + stating that you changed the files and the date of any change.\n\ +\n\ + b) You must cause any work that you distribute or publish, that in\n\ + whole or in part contains or is derived from the Program or any\n\ + part thereof, to be licensed as a whole at no charge to all third\n\ + parties under the terms of this License.\n\ +\n\ + c) If the modified program normally reads commands interactively\n\ + when run, you must cause it, when started running for such\n\ + interactive use in the most ordinary way, to print or display an\n\ + announcement including an appropriate copyright notice and a\n\ + notice that there is no warranty (or else, saying that you provide\n\ + a warranty) and that users may redistribute the program under\n\ + these conditions, and telling the user how to view a copy of this\n\ + License. (Exception: if the Program itself is interactive but\n\ + does not normally print such an announcement, your work based on\n\ + the Program is not required to print an announcement.)\n\ +\n\ +These requirements apply to the modified work as a whole. If\n\ +identifiable sections of that work are not derived from the Program,\n\ +and can be reasonably considered independent and separate works in\n\ +themselves, then this License, and its terms, do not apply to those\n\ +sections when you distribute them as separate works. But when you\n\ +distribute the same sections as part of a whole which is a work based\n\ +on the Program, the distribution of the whole must be on the terms of\n\ +this License, whose permissions for other licensees extend to the\n\ +entire whole, and thus to each and every part regardless of who wrote it.\n\ +\n\ +Thus, it is not the intent of this section to claim rights or contest\n\ +your rights to work written entirely by you; rather, the intent is to\n\ +exercise the right to control the distribution of derivative or\n\ +collective works based on the Program.\n\ +\n\ +In addition, mere aggregation of another work not based on the Program\n\ +with the Program (or with a work based on the Program) on a volume of\n\ +a storage or distribution medium does not bring the other work under\n\ +the scope of this License.\n\ +\n\ + 3. You may copy and distribute the Program (or a work based on it,\n\ +under Section 2) in object code or executable form under the terms of\n\ +Sections 1 and 2 above provided that you also do one of the following:\n\ +\n\ + a) Accompany it with the complete corresponding machine-readable\n\ + source code, which must be distributed under the terms of Sections\n\ + 1 and 2 above on a medium customarily used for software interchange; or,\n\ +\n\ + b) Accompany it with a written offer, valid for at least three\n\ + years, to give any third party, for a charge no more than your\n\ + cost of physically performing source distribution, a complete\n\ + machine-readable copy of the corresponding source code, to be\n\ + distributed under the terms of Sections 1 and 2 above on a medium\n\ + customarily used for software interchange; or,\n\ +\n\ + c) Accompany it with the information you received as to the offer\n\ + to distribute corresponding source code. (This alternative is\n\ + allowed only for noncommercial distribution and only if you\n\ + received the program in object code or executable form with such\n\ + an offer, in accord with Subsection b above.)\n\ +\n\ +The source code for a work means the preferred form of the work for\n\ +making modifications to it. For an executable work, complete source\n\ +code means all the source code for all modules it contains, plus any\n\ +associated interface definition files, plus the scripts used to\n\ +control compilation and installation of the executable. However, as a\n\ +special exception, the source code distributed need not include\n\ +anything that is normally distributed (in either source or binary\n\ +form) with the major components (compiler, kernel, and so on) of the\n\ +operating system on which the executable runs, unless that component\n\ +itself accompanies the executable.\n\ +\n\ +If distribution of executable or object code is made by offering\n\ +access to copy from a designated place, then offering equivalent\n\ +access to copy the source code from the same place counts as\n\ +distribution of the source code, even though third parties are not\n\ +compelled to copy the source along with the object code.\n\ +\n\ + 4. You may not copy, modify, sublicense, or distribute the Program\n\ +except as expressly provided under this License. Any attempt\n\ +otherwise to copy, modify, sublicense or distribute the Program is\n\ +void, and will automatically terminate your rights under this License.\n\ +However, parties who have received copies, or rights, from you under\n\ +this License will not have their licenses terminated so long as such\n\ +parties remain in full compliance.\n\ +\n\ + 5. You are not required to accept this License, since you have not\n\ +signed it. However, nothing else grants you permission to modify or\n\ +distribute the Program or its derivative works. These actions are\n\ +prohibited by law if you do not accept this License. Therefore, by\n\ +modifying or distributing the Program (or any work based on the\n\ +Program), you indicate your acceptance of this License to do so, and\n\ +all its terms and conditions for copying, distributing or modifying\n\ +the Program or works based on it.\n\ +\n\ + 6. Each time you redistribute the Program (or any work based on the\n\ +Program), the recipient automatically receives a license from the\n\ +original licensor to copy, distribute or modify the Program subject to\n\ +these terms and conditions. You may not impose any further\n\ +restrictions on the recipients' exercise of the rights granted herein.\n\ +You are not responsible for enforcing compliance by third parties to\n\ +this License.\n\ +\n\ + 7. If, as a consequence of a court judgment or allegation of patent\n\ +infringement or for any other reason (not limited to patent issues),\n\ +conditions are imposed on you (whether by court order, agreement or\n\ +otherwise) that contradict the conditions of this License, they do not\n\ +excuse you from the conditions of this License. If you cannot\n\ +distribute so as to satisfy simultaneously your obligations under this\n\ +License and any other pertinent obligations, then as a consequence you\n\ +may not distribute the Program at all. For example, if a patent\n\ +license would not permit royalty-free redistribution of the Program by\n\ +all those who receive copies directly or indirectly through you, then\n\ +the only way you could satisfy both it and this License would be to\n\ +refrain entirely from distribution of the Program.\n\ +\n\ +If any portion of this section is held invalid or unenforceable under\n\ +any particular circumstance, the balance of the section is intended to\n\ +apply and the section as a whole is intended to apply in other\n\ +circumstances.\n\ +\n\ +It is not the purpose of this section to induce you to infringe any\n\ +patents or other property right claims or to contest validity of any\n\ +such claims; this section has the sole purpose of protecting the\n\ +integrity of the free software distribution system, which is\n\ +implemented by public license practices. Many people have made\n\ +generous contributions to the wide range of software distributed\n\ +through that system in reliance on consistent application of that\n\ +system; it is up to the author/donor to decide if he or she is willing\n\ +to distribute software through any other system and a licensee cannot\n\ +impose that choice.\n\ +\n\ +This section is intended to make thoroughly clear what is believed to\n\ +be a consequence of the rest of this License.\n\ +\n\ + 8. If the distribution and/or use of the Program is restricted in\n\ +certain countries either by patents or by copyrighted interfaces, the\n\ +original copyright holder who places the Program under this License\n\ +may add an explicit geographical distribution limitation excluding\n\ +those countries, so that distribution is permitted only in or among\n\ +countries not thus excluded. In such case, this License incorporates\n\ +the limitation as if written in the body of this License.\n\ +\n\ + 9. The Free Software Foundation may publish revised and/or new versions\n\ +of the General Public License from time to time. Such new versions will\n\ +be similar in spirit to the present version, but may differ in detail to\n\ +address new problems or concerns.\n\ +\n\ +Each version is given a distinguishing version number. If the Program\n\ +specifies a version number of this License which applies to it and \"any\n\ +later version\", you have the option of following the terms and conditions\n\ +either of that version or of any later version published by the Free\n\ +Software Foundation. If the Program does not specify a version number of\n\ +this License, you may choose any version ever published by the Free Software\n\ +Foundation.\n\ +\n\ + 10. If you wish to incorporate parts of the Program into other free\n\ +programs whose distribution conditions are different, write to the author\n\ +to ask for permission. For software which is copyrighted by the Free\n\ +Software Foundation, write to the Free Software Foundation; we sometimes\n\ +make exceptions for this. Our decision will be guided by the two goals\n\ +of preserving the free status of all derivatives of our free software and\n\ +of promoting the sharing and reuse of software generally.\n"); +} + +extern void warranty(environment *env){ + printf(" NO WARRANTY\n\ +\n\ + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY\n\ +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN\n\ +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES\n\ +PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED\n\ +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\n\ +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS\n\ +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE\n\ +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,\n\ +REPAIR OR CORRECTION.\n\ +\n\ + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING\n\ +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR\n\ +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,\n\ +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING\n\ +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED\n\ +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY\n\ +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER\n\ +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE\n\ +POSSIBILITY OF SUCH DAMAGES.\n"); +}