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/* |
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* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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* |
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* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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* |
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* Deliantra is free software: you can redistribute it and/or modify it under |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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*/ |
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|
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/* |
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* General convenience functions for deliantra. |
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*/ |
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|
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#include <cstdlib> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <sys/time.h> |
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#include <time.h> |
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#include <signal.h> |
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|
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#include <global.h> |
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#include <material.h> |
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#include <object.h> |
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|
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#include <sys/time.h> |
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#include <sys/resource.h> |
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|
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#include <glib.h> |
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|
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refcnt_base::refcnt_t refcnt_dummy; |
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ssize_t slice_alloc; |
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|
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#if !GCC_VERSION(3,4) |
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int least_significant_bit (uint32_t x) |
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{ |
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x &= -x; // this isolates the lowest bit |
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|
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int r = 0; |
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|
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if (x & 0xaaaaaaaa) r += 1; |
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if (x & 0xcccccccc) r += 2; |
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if (x & 0xf0f0f0f0) r += 4; |
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if (x & 0xff00ff00) r += 8; |
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if (x & 0xffff0000) r += 16; |
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|
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return r; |
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} |
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#endif |
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|
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/******************************************************************************/ |
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|
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/* Checks a player-provided string which will become the msg property of |
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* an object for dangerous input. |
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*/ |
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bool |
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msg_is_safe (const char *msg) |
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{ |
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bool safe = true; |
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|
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/* Trying to cheat by getting data into the object */ |
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if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1) |
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|| strstr (msg, "\nendmsg")) |
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safe = false; |
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|
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/* Trying to make the object talk, and potentially access arbitrary code */ |
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if (object::msg_has_dialogue (msg)) |
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safe = false; |
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|
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return safe; |
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} |
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|
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///////////////////////////////////////////////////////////////////////////// |
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|
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void |
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fork_abort (const char *msg) |
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{ |
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if (!fork ()) |
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{ |
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signal (SIGINT , SIG_IGN); |
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signal (SIGTERM, SIG_IGN); |
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signal (SIGABRT, SIG_IGN); |
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|
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signal (SIGSEGV, SIG_DFL); |
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signal (SIGBUS , SIG_DFL); |
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signal (SIGILL , SIG_DFL); |
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signal (SIGTRAP, SIG_DFL); |
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|
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// try to put corefiles into a subdirectory, if existing, to allow |
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// an administrator to reduce the I/O load. |
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chdir ("cores"); |
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|
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// try to detach us from as many external dependencies as possible |
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// as coredumping can take time by closing all fd's. |
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{ |
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struct rlimit lim; |
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|
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if (getrlimit (RLIMIT_NOFILE, &lim)) |
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lim.rlim_cur = 1024; |
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|
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for (int i = 0; i < lim.rlim_cur; ++i) |
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close (i); |
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} |
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|
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{ |
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sigset_t empty; |
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sigemptyset (&empty); |
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sigprocmask (SIG_SETMASK, &empty, 0); |
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} |
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|
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// try to coredump with SIGTRAP |
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kill (getpid (), SIGTRAP); |
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abort (); |
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} |
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|
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LOG (llevError, "fork abort: %s\n", msg); |
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} |
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|
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void * |
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salloc_ (int n) throw (std::bad_alloc) |
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{ |
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void *ptr = g_slice_alloc (n); |
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|
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if (!ptr) |
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throw std::bad_alloc (); |
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|
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slice_alloc += n; |
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return ptr; |
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} |
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|
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void * |
144 |
salloc_ (int n, void *src) throw (std::bad_alloc) |
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{ |
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void *ptr = salloc_ (n); |
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|
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if (src) |
149 |
memcpy (ptr, src, n); |
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else |
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memset (ptr, 0, n); |
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|
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return ptr; |
154 |
} |
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|
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/******************************************************************************/ |
157 |
|
158 |
#if DEBUG_SALLOC |
159 |
|
160 |
#define MAGIC 0xa1b2c35543deadLL |
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|
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void * |
163 |
g_slice_alloc (unsigned long size) |
164 |
{ |
165 |
unsigned long *p = (unsigned long *) (g_slice_alloc)(size + sizeof (unsigned long)); |
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*p++ = size ^ MAGIC; |
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//fprintf (stderr, "g_slice_alloc %ld %p\n", size, p);//D |
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return (void *)p; |
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} |
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|
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void * |
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g_slice_alloc0 (unsigned long size) |
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{ |
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return memset (g_slice_alloc (size), 0, size); |
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} |
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|
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void |
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g_slice_free1 (unsigned long size, void *ptr) |
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{ |
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//fprintf (stderr, "g_slice_free %ld %p\n", size, ptr);//D |
181 |
if (expect_true (ptr)) |
182 |
{ |
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unsigned long *p = (unsigned long *)ptr; |
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unsigned long s = *--p ^ MAGIC; |
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|
186 |
if (size != (unsigned long)(*p ^ MAGIC)) |
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{ |
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LOG (logBacktrace | llevError, "slice free size (%lx) doesn't match alloc size (%lx)\n", size, s); |
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abort (); |
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} |
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|
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*p = MAGIC; |
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|
194 |
(g_slice_free1)(s + sizeof (unsigned long), p); |
195 |
} |
196 |
} |
197 |
|
198 |
#endif |
199 |
|
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/******************************************************************************/ |
201 |
|
202 |
refcnt_buf::refcnt_buf (size_t size) |
203 |
{ |
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_alloc (size); |
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} |
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|
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refcnt_buf::refcnt_buf (void *data, size_t size) |
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{ |
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_alloc (size); |
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memcpy (this->data, data, size); |
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} |
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|
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refcnt_buf::~refcnt_buf () |
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{ |
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dec (); |
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} |
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|
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refcnt_buf & |
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refcnt_buf::operator =(const refcnt_buf &src) |
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{ |
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dec (); |
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data = src.data; |
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++_refcnt (); |
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return *this; |
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} |
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|
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/******************************************************************************/ |
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|
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int |
230 |
assign (char *dst, const char *src, int maxsize) |
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{ |
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if (!src) |
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src = ""; |
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|
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int len = strlen (src); |
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|
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if (len >= maxsize) |
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{ |
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if (maxsize <= 4) |
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{ |
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memset (dst, '.', maxsize - 2); |
242 |
dst [maxsize - 1] = 0; |
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} |
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else |
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{ |
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memcpy (dst, src, maxsize - 4); |
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memcpy (dst + maxsize - 4, "...", 4); |
248 |
} |
249 |
|
250 |
len = maxsize; |
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} |
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else |
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memcpy (dst, src, ++len); |
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|
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return len; |
256 |
} |
257 |
|
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char * |
259 |
vformat (const char *format, va_list ap) |
260 |
{ |
261 |
static dynbuf_text bufs[8]; |
262 |
static int bufidx; |
263 |
|
264 |
dynbuf_text &buf = bufs [++bufidx & 7]; |
265 |
|
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buf.clear (); |
267 |
buf.vprintf (format, ap); |
268 |
return buf; |
269 |
} |
270 |
|
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char * |
272 |
format (const char *format, ...) |
273 |
{ |
274 |
va_list ap; |
275 |
va_start (ap, format); |
276 |
char *buf = vformat (format, ap); |
277 |
va_end (ap); |
278 |
|
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return buf; |
280 |
} |
281 |
|
282 |
tstamp |
283 |
now () |
284 |
{ |
285 |
struct timeval tv; |
286 |
|
287 |
gettimeofday (&tv, 0); |
288 |
return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6); |
289 |
} |
290 |
|
291 |
int |
292 |
similar_direction (int a, int b) |
293 |
{ |
294 |
if (!a || !b) |
295 |
return 0; |
296 |
|
297 |
int diff = (b - a) & 7; |
298 |
return diff <= 1 || diff >= 7; |
299 |
} |
300 |
|
301 |
/* crc32 0xdebb20e3 table and supplementary functions. */ |
302 |
extern const uint32_t crc_32_tab[256] = |
303 |
{ |
304 |
0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL, |
305 |
0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL, |
306 |
0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL, |
307 |
0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL, |
308 |
0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL, |
309 |
0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL, |
310 |
0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL, |
311 |
0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL, |
312 |
0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL, |
313 |
0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL, |
314 |
0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL, |
315 |
0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL, |
316 |
0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL, |
317 |
0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL, |
318 |
0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL, |
319 |
0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL, |
320 |
0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL, |
321 |
0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL, |
322 |
0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL, |
323 |
0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL, |
324 |
0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL, |
325 |
0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL, |
326 |
0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL, |
327 |
0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL, |
328 |
0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL, |
329 |
0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL, |
330 |
0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL, |
331 |
0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL, |
332 |
0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL, |
333 |
0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL, |
334 |
0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL, |
335 |
0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL, |
336 |
0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL, |
337 |
0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL, |
338 |
0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL, |
339 |
0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL, |
340 |
0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL, |
341 |
0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL, |
342 |
0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL, |
343 |
0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL, |
344 |
0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL, |
345 |
0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL, |
346 |
0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL, |
347 |
0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL, |
348 |
0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL, |
349 |
0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL, |
350 |
0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL, |
351 |
0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL, |
352 |
0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL, |
353 |
0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL, |
354 |
0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL, |
355 |
0x2d02ef8dL |
356 |
}; |
357 |
|
358 |
void |
359 |
thread::start (void *(*start_routine)(void *), void *arg) |
360 |
{ |
361 |
pthread_attr_t attr; |
362 |
|
363 |
pthread_attr_init (&attr); |
364 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
365 |
pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096 |
366 |
? sizeof (long) * 4096 : PTHREAD_STACK_MIN); |
367 |
#ifdef PTHREAD_SCOPE_PROCESS |
368 |
pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
369 |
#endif |
370 |
|
371 |
sigset_t fullsigset, oldsigset; |
372 |
sigfillset (&fullsigset); |
373 |
|
374 |
pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset); |
375 |
|
376 |
if (pthread_create (&id, &attr, start_routine, arg)) |
377 |
cleanup ("unable to create a new thread"); |
378 |
|
379 |
pthread_sigmask (SIG_SETMASK, &oldsigset, 0); |
380 |
} |
381 |
|