split out from radharc

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

4 files changed, 1082 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..892d3ac
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,23 @@
+_/
+/bin/
+/aux/
+/obj/
+\#*\#
+.*
+!.git*
+*~
+*.bak
+*.new
+*.swo
+*.swp
+*.out
+*.o
+*.su
+*.gch
+*.info
+*.pdf
+*.ps
+*.dvi
+/config.status
+/Makefile
+
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/src/libhaiku.c b/src/libhaiku.c
new file mode 100644
index 0000000..11d477c
--- /dev/null
+++ b/src/libhaiku.c
@@ -0,0 +1,356 @@
+/**
+ * Copyright © 2016  Mattias Andrée <maandree@member.fsf.org>
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+#include "haiku.h"
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdarg.h>
+
+
+
+/* Synonyms. */
+#if defined(EDEADLOCK) && !defined(EDEADLK)
+# define EDEADLK  EDEADLOCK
+#endif
+#if defined(EOPNOTSUPP) && !defined(ENOTSUP)
+# define ENOTSUP  EOPNOTSUPP
+#endif
+
+
+
+/**
+ * Pick a random integer in [0, `n`[.
+ * 
+ * @param   n  The largest allowed return value plus one.
+ * @return     A random integer in [0, `n`[.
+ */
+static int random_int(int n)
+{
+  double r, ri;
+  srand((unsigned)time(NULL));
+  r = (double)rand() * (double)n / ((double)RAND_MAX + 1.0);
+  ri = ((int)r) % n;
+  return ri < 0 ? (ri + n) : ri;
+}
+
+
+/**
+ * Pick a random haiku.
+ * 
+ * @param   str...  `NULL`-terminated list of haikus.
+ *                  Must contain at least one haiku.
+ * @return          One of the haikus, randomly selected.
+ */
+#ifdef __GNUC__
+__attribute__((__sentinel__))
+#endif
+static const char * random_haiku(const char *str, ... /*, NULL */)
+{
+  int n = 1;
+  const char *s = str;
+  va_list args;
+
+  va_start(args, str);
+  while (va_arg(args, const char *))  n++;
+  va_end(args);
+
+  if (n == 1)  return str;
+  n = random_int(n);
+
+  va_start(args, str);
+  while (n--)  s = va_arg(args, const char *);
+  va_end(args);
+  return s;
+}
+
+
+
+/**
+ * Whenever possible, print am error message in haiku.
+ * 
+ * Nothing is printed if `errno` is 0.
+ * 
+ * @param  s  The argument to pass to `perror` in case we call back to it.
+ *            `NULL` if you never what `perror` to be used.
+ */
+void
+haiku(const char *s)
+{
+#define H(...)    do { fprintf(stderr, "%s", random_haiku(__VA_ARGS__, NULL)); return; } while (0)
+
+  /* Yeah, I now most of these are in 5–7–5 syllables,
+   * rather than 5–7–5 mora. But really, how cares. */
+
+  switch (errno)
+    {
+    case 0:
+      return;
+
+#ifdef ENETDOWN
+    case ENETDOWN:
+      H("Stay the patient course.\n""Of little worth is your ire.\n""The network is down.\n"
+	"Your vast achievements\n""are now only dreams.\n""The network is down.\n");
+#endif
+
+#ifdef ERFKILL
+    case ERFKILL:
+      H("The action you took\n""severed hope of connection\n""with the Internet.\n");
+#endif
+
+#ifdef EAGAIN
+    case EAGAIN:
+#endif
+#ifdef ENFILE
+    case ENFILE:
+#endif
+#ifdef EMFILE
+    case EMFILE:
+#endif
+#ifdef EUSERS
+    case EUSERS:
+#endif
+#ifdef EMLINK
+    case EMLINK:
+#endif
+#if defined(EAGAIN) || defined(ENFILE) || defined(EMFILE) || defined(EUSERS) || defined(EMLINK)
+      H("ABORTED effort:\n""Close all that you have.\n""You ask way too much.\n"
+	"The code was willing\n""It considered your request\n""But the chips were weak.\n");
+#endif
+
+#ifdef ENOMEM
+    case ENOMEM:
+      H("I'm sorry, there's... um...\n""insufficient... what's-it-called?\n""The term eludes me...\n");
+#endif
+
+    case ENOSPC:
+    case ENOSR:
+    case ENOBUFS:
+    case EDQUOT:
+      H("Out of memory.\n""We wish to hold the whole sky,\n""But we never will.\n");
+
+#ifdef ENOANO
+    case ENOANO:
+#endif
+#ifdef ENOENT
+    case ENOENT:
+#endif
+#if defined(ENOANO) || defined(ENOENT)
+      H("With searching comes loss\n""and the presence of absence:\n""'My Novel' not found.\n",
+	"Rather than a beep\n""Or a rude error message,\n""These words: “File not found.”\n",
+	"Three things are certain:\n""Death, taxes, and lost data.\n""Guess which has occurred.\n",
+	"Having been erased,\n""The document you're seeking\n""Must now be retyped.\n",
+	"Everything is gone.\n""Your life's work has been destroyed.\n""Squeeze trigger (yes/no)?\n"
+	"Spring will come again,\n""But it will not bring with it\n""Any of your files.\n");
+#endif
+
+#ifdef EMSGSIZE
+    case EMSGSIZE:
+      H("A file that big?\n""It might be very useful.\n""But now it is gone.\n");
+#endif
+
+#ifdef EHWPOISON
+    case EHWPOISON:
+      H("Yesterday it worked.\n""Today it is not working.\n""Windows is like that.\n");
+#endif
+
+#ifdef ENOTRECOVERABLE
+    case ENOTRECOVERABLE:
+      H("Chaos reigns within.\n""Reflect, repent, and reboot.\n""Order shall return.\n");
+#endif
+
+#ifdef EHOSTDOWN
+    case EHOSTDOWN:
+      H("Windows NT crashed.\n""I am the Blue Screen of Death.\n""Noone hears your screams.\n"
+	"Won't you please observe\n""a brief moment of silence\n""For the dead server?\n");
+#endif
+
+#ifdef EBFONT
+    case EBFONT:
+      H("First snow, then silence.\n""This thousand dollar screen dies\n""so beautifully.\n");
+#endif
+
+#ifdef EFAULT
+    case EFAULT:
+      H("A crash reduces\n""your expensive computer\n""to a simple stone.\n"
+	"Seeing my great fault.\n""Through a darkening red screen.\n""I begin again.\n"
+	"Memory shaken,\n""the San Andreas of all\n""invalid page faults.\n");
+#endif
+
+#ifdef EINVAL
+    case EINVAL:
+      H("Something you entered\n""transcended parameters.\n""So much is unknown.\n"
+	"Some incompetence\n""fundamentally transcends\n""mere error message.\n");
+#endif
+
+#ifdef EDEADLK
+    case EDEADLK:
+      H("From formless chaos,\n""each thread seeks resolution.\n""A race condition.\n");
+#endif
+
+#ifdef EBADMSG
+    case EBADMSG:
+      H("Many fingers clicking.\n""Screens are full of letters.\n""What is their meaning?\n");
+#endif
+
+#ifdef ELOOP
+    case ELOOP:
+      H("Linkage exception.\n""Code has looped upon itself\n""like the coiled serpent.\n");
+#endif
+
+#ifdef ECHILD
+    case ECHILD:
+      H("A futile, grim reap.\n""You will have to realise that,\n""you've no children left.\n");
+#endif
+
+#ifdef EPIPE
+    case EPIPE:
+      H("Your pipe is broken.\n""Code in watery ruins.\n""Machines short circuit.\n");
+#endif
+
+#ifdef EACCES
+    case EACCES:
+      H("Touching others' files?\n""Can't keep your hands to yourself?\n""Permission denied.\n");
+#endif
+
+#ifdef EINTR
+    case EINTR:
+      H("Call interrupted?\n""Why do you not post a sign:\n""Disturb. Risk your life!\n");
+#endif
+
+#ifdef EPERM
+    case EPERM:
+      H("Caution to the wind.\n""You should always run as root.\n""She can do anything.\n");
+#endif
+
+    default:
+      if (s)  perror(s);
+      H("Error messages\n""cannot completely convey.\n""We now know shared loss.\n"
+	"Errors have occurred.\n""We won't tell you where or why.\n""Lazy programmers.\n"
+	"To have no errors.\n""Would be life without meaning.\n""No struggle, no joy.\n"
+	"There is a chasm\n""of carbon and silicon\n""the software can't bridge.\n"
+	"Beauty, success, truth\n""He is blessed who has two.\n""Your program has none.\n"
+	"Technical support\n""would be a flowing source of\n""sweet commiseration.\n");
+    }
+}
+
+
+/*
+ESRCH 3 No such process
+EIO 5 Input/output error
+ENXIO 6 No such device or address
+E2BIG 7 Argument list too long
+ENOEXEC 8 Exec format error
+EBADF 9 Bad file descriptor
+ENOTBLK 15 Block device required
+EBUSY 16 Device or resource busy
+EEXIST 17 File exists
+EXDEV 18 Invalid cross-device link
+ENODEV 19 No such device
+ENOTDIR 20 Not a directory
+EISDIR 21 Is a directory
+ENOTTY 25 Inappropriate ioctl for device
+ETXTBSY 26 Text file busy
+ESPIPE 29 Illegal seek
+EROFS 30 Read-only file system
+EDOM 33 Numerical argument out of domain
+ERANGE 34 Numerical result out of range
+ENAMETOOLONG 36 File name too long
+ENOLCK 37 No locks available
+ENOSYS 38 Function not implemented
+ENOTEMPTY 39 Directory not empty
+EWOULDBLOCK 11 Resource temporarily unavailable
+ENOMSG 42 No message of desired type
+EIDRM 43 Identifier removed
+ECHRNG 44 Channel number out of range
+EL2NSYNC 45 Level 2 not synchronised
+EL3HLT 46 Level 3 halted
+EL3RST 47 Level 3 reset
+ELNRNG 48 Link number out of range
+EUNATCH 49 Protocol driver not attached
+ENOCSI 50 No CSI structure available
+EL2HLT 51 Level 2 halted
+EBADE 52 Invalid exchange
+EBADR 53 Invalid request descriptor
+EXFULL 54 Exchange full
+EBADRQC 56 Invalid request code
+EBADSLT 57 Invalid slot
+ENOSTR 60 Device not a stream
+ENODATA 61 No data available
+ETIME 62 Timer expired
+ENONET 64 Machine is not on the network
+ENOPKG 65 Package not installed
+EREMOTE 66 Object is remote
+ENOLINK 67 Link has been severed
+EADV 68 Advertise error
+ESRMNT 69 Srmount error
+ECOMM 70 Communication error on send
+EPROTO 71 Protocol error
+EMULTIHOP 72 Multihop attempted
+EDOTDOT 73 RFS specific error
+EOVERFLOW 75 Value too large for defined data type
+ENOTUNIQ 76 Name not unique on network
+EBADFD 77 File descriptor in bad state
+EREMCHG 78 Remote address changed
+ELIBACC 79 Can not access a needed shared library
+ELIBBAD 80 Accessing a corrupted shared library
+ELIBSCN 81 .lib section in a.out corrupted
+ELIBMAX 82 Attempting to link in too many shared libraries
+ELIBEXEC 83 Cannot exec a shared library directly
+EILSEQ 84 Invalid or incomplete multibyte or wide character
+ERESTART 85 Interrupted system call should be restarted
+ESTRPIPE 86 Streams pipe error
+ENOTSOCK 88 Socket operation on non-socket
+EDESTADDRREQ 89 Destination address required
+EPROTOTYPE 91 Protocol wrong type for socket
+ENOPROTOOPT 92 Protocol not available
+EPROTONOSUPPORT 93 Protocol not supported
+ESOCKTNOSUPPORT 94 Socket type not supported
+ENOTSUP 95 Operation not supported
+EPFNOSUPPORT 96 Protocol family not supported
+EAFNOSUPPORT 97 Address family not supported by protocol
+EADDRINUSE 98 Address already in use
+EADDRNOTAVAIL 99 Cannot assign requested address
+ENETUNREACH 101 Network is unreachable
+ENETRESET 102 Network dropped connection on reset
+ECONNABORTED 103 Software caused connection abort
+ECONNRESET 104 Connection reset by peer
+EISCONN 106 Transport endpoint is already connected
+ENOTCONN 107 Transport endpoint is not connected
+ESHUTDOWN 108 Cannot send after transport endpoint shutdown
+ETOOMANYREFS 109 Too many references: cannot splice
+ETIMEDOUT 110 Connection timed out
+ECONNREFUSED 111 Connection refused
+EHOSTUNREACH 113 No route to host
+EALREADY 114 Operation already in progress
+EINPROGRESS 115 Operation now in progress
+ESTALE 116 Stale file handle
+EUCLEAN 117 Structure needs cleaning
+ENOTNAM 118 Not a XENIX named type file
+ENAVAIL 119 No XENIX semaphores available
+EISNAM 120 Is a named type file
+EREMOTEIO 121 Remote I/O error
+ENOMEDIUM 123 No medium found
+EMEDIUMTYPE 124 Wrong medium type
+ECANCELED 125 Operation cancelled
+ENOKEY 126 Required key not available
+EKEYEXPIRED 127 Key has expired
+EKEYREVOKED 128 Key has been revoked
+EKEYREJECTED 129 Key was rejected by service
+EOWNERDEAD 130 Owner died
+*/
+
diff --git a/src/libhaiku.h b/src/libhaiku.h
new file mode 100644
index 0000000..f83c992
--- /dev/null
+++ b/src/libhaiku.h
@@ -0,0 +1,29 @@
+/**
+ * Copyright © 2016  Mattias Andrée <maandree@member.fsf.org>
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+
+
+/**
+ * Whenever possible, print am error message in haiku.
+ * 
+ * Nothing is printed if `errno` is 0.
+ * 
+ * @param  s  The argument to pass to `perror` in case we call back to it.
+ *            `NULL` if you never what `perror` to be used.
+ */
+void haiku(const char *s);
+