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elmex |
1.1 |
/* |
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1.28 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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1.23 |
* |
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1.29 |
* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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1.23 |
* |
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1.28 |
* Deliantra is free software: you can redistribute it and/or modify |
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1.24 |
* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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1.23 |
* |
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1.24 |
* 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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1.23 |
* |
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1.24 |
* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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1.23 |
* |
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1.28 |
* The authors can be reached via e-mail to <support@deliantra.net> |
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1.22 |
*/ |
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/* |
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1.3 |
* shstr.C |
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elmex |
1.1 |
*/ |
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1.3 |
#include <cstring> |
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#include <cstdlib> |
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1.10 |
#include <glib.h> |
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1.3 |
#include <tr1/unordered_set> |
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elmex |
1.1 |
|
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1.16 |
#include "global.h" |
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elmex |
1.1 |
|
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1.26 |
size_t shstr_alloc; |
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1.31 |
typedef std::tr1::unordered_set <const char *, str_hash, str_equal, slice_allocator<const char *> > HT; |
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elmex |
1.1 |
|
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1.16 |
static HT ht; |
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1.29 |
static int next_gc; |
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elmex |
1.1 |
|
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1.13 |
static const char * |
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makevec (const char *s) |
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1.7 |
{ |
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1.17 |
int len = strlen (s); |
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1.38 |
int alloc = sizeof (uint32_t) * 2 + len + 1; |
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1.7 |
|
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1.38 |
shstr_alloc += alloc; |
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char *v = (char *)g_slice_alloc (alloc); |
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v += sizeof (uint32_t) * 2; |
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1.7 |
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shstr::length (v) = len; |
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shstr::refcnt (v) = 1; |
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1.38 |
memcpy (v, s, len + 1); |
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1.7 |
|
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1.8 |
return v; |
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1.7 |
} |
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1.33 |
shstr_vec<sizeof "(null)"> shstr_tmp::nullvec = { 0, 0xffffffff, "(null)" }; |
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1.15 |
|
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elmex |
1.1 |
const char * |
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1.3 |
shstr::find (const char *s) |
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{ |
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1.4 |
if (!s) |
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return s; |
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1.21 |
auto (i, ht.find (s)); |
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elmex |
1.1 |
|
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1.13 |
return i != ht.end ()? *i : 0; |
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elmex |
1.1 |
} |
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const char * |
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1.3 |
shstr::intern (const char *s) |
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{ |
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1.4 |
if (!s) |
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1.33 |
return null (); |
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elmex |
1.1 |
|
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1.4 |
if (const char *found = find (s)) |
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1.5 |
{ |
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++refcnt (found); |
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return found; |
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} |
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elmex |
1.1 |
|
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1.29 |
--next_gc; |
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1.7 |
s = makevec (s); |
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ht.insert (s); |
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return s; |
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elmex |
1.1 |
} |
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1.5 |
// periodically test refcounts == 0 for a few strings |
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// this is the ONLY thing that erases stuff from ht. keep it that way. |
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elmex |
1.1 |
void |
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1.3 |
shstr::gc () |
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{ |
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1.29 |
if (expect_true (next_gc > 0)) |
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return; |
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1.5 |
static const char *curpos; |
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1.21 |
auto (i, curpos ? ht.find (curpos) : ht.begin ()); |
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1.5 |
|
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if (i == ht.end ()) |
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i = ht.begin (); |
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1.11 |
int n = ht.size () / 256 + 16; |
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1.29 |
next_gc += n >> 1; |
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1.6 |
|
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for (;;) |
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1.5 |
{ |
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if (i == ht.end ()) |
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{ |
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curpos = 0; |
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return; |
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} |
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1.6 |
else if (!--n) |
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break; |
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else if (!refcnt (*i)) |
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root |
1.5 |
{ |
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1.21 |
auto (o, i++); |
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1.5 |
const char *s = *o; |
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1.13 |
|
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1.5 |
ht.erase (o); |
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//printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s)); |
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1.38 |
int alloc = sizeof (uint32_t) * 2 + length (s) + 1; |
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shstr_alloc -= alloc; |
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g_slice_free1 (alloc, (void *)(s - sizeof (uint32_t) * 2)); |
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1.5 |
} |
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else |
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++i; |
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} |
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curpos = *i; |
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elmex |
1.1 |
} |
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1.25 |
// declare these here to get correct initialisation order |
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root |
1.37 |
#define def2(id,str) const shstr id (str); |
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#define def(id) def2(shstr_ ## id, # id) |
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1.25 |
# include "shstrinc.h" |
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#undef def |
140 |
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1.36 |
#undef def2 |
141 |
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1.25 |
|
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1.16 |
shstr skill_names[NUM_SKILLS]; |
143 |
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1.5 |
//TODO: this should of course not be here |
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1.13 |
|
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elmex |
1.1 |
/* buf_overflow() - we don't want to exceed the buffer size of |
147 |
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* buf1 by adding on buf2! Returns true if overflow will occur. |
148 |
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*/ |
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root |
1.13 |
int |
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elmex |
1.1 |
buf_overflow (const char *buf1, const char *buf2, int bufsize) |
151 |
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{ |
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root |
1.13 |
int len1 = 0, len2 = 0; |
153 |
elmex |
1.1 |
|
154 |
root |
1.13 |
if (buf1) |
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len1 = strlen (buf1); |
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root |
1.26 |
|
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root |
1.13 |
if (buf2) |
158 |
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len2 = strlen (buf2); |
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root |
1.26 |
|
160 |
root |
1.13 |
if ((len1 + len2) >= bufsize) |
161 |
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return 1; |
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root |
1.22 |
|
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root |
1.13 |
return 0; |
164 |
elmex |
1.1 |
} |