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1 | /* |
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2 | * CrossFire, A Multiplayer game |
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3 | * |
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4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or modify |
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7 | * it under the terms of the GNU General Public License as published by |
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8 | * the Free Software Foundation; either version 2 of the License, or |
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9 | * (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License |
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17 | * along with this program; if not, write to the Free Software |
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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19 | * |
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20 | * The authors can be reached via e-mail at <crossfire@schmorp.de> |
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21 | */ |
1 | |
22 | |
2 | /* |
23 | /* |
3 | * shstr.C |
24 | * shstr.C |
4 | */ |
25 | */ |
5 | |
26 | |
6 | #include <cstring> |
27 | #include <cstring> |
7 | #include <cstdlib> |
28 | #include <cstdlib> |
8 | |
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9 | #include <glib.h> |
29 | #include <glib.h> |
10 | |
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11 | #include <tr1/unordered_set> |
30 | #include <tr1/unordered_set> |
12 | |
31 | |
13 | #include "shstr.h" |
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14 | #include "util.h" |
32 | #include "global.h" |
15 | |
33 | |
16 | typedef |
34 | typedef std::tr1::unordered_set <const char *, str_hash, str_equal, slice_allocator<const char *>, true> HT; |
17 | std::tr1::unordered_set < const char *, |
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18 | str_hash, |
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19 | str_equal > |
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20 | HT; |
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21 | |
35 | |
22 | static HT |
36 | static HT ht; |
23 | ht; |
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24 | |
37 | |
25 | static const char * |
38 | static const char * |
26 | makevec (const char *s) |
39 | makevec (const char *s) |
27 | { |
40 | { |
28 | int |
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29 | len = strlen (s); |
41 | int len = strlen (s); |
30 | |
42 | |
31 | const char * |
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32 | v = (const char *) (2 + (int *) g_slice_alloc (sizeof (int) * 2 + len + 1)); |
43 | const char *v = (const char *) (2 + (int *)g_slice_alloc (sizeof (int) * 2 + len + 1)); |
33 | |
44 | |
34 | shstr::length (v) = len; |
45 | shstr::length (v) = len; |
35 | shstr::refcnt (v) = 1; |
46 | shstr::refcnt (v) = 1; |
36 | |
47 | |
37 | memcpy ((char *) v, s, len + 1); |
48 | memcpy ((char *) v, s, len + 1); |
38 | |
49 | |
39 | return v; |
50 | return v; |
40 | } |
51 | } |
41 | |
52 | |
42 | const char * |
53 | static const char * |
43 | shstr::null = makevec ("<nil>"); |
54 | makenull () |
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55 | { |
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56 | const char *s = makevec ("(null)"); |
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57 | shstr::length (s) = 0; |
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58 | return s; |
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59 | } |
44 | |
60 | |
45 | // what weird misoptimisation is this again? |
61 | const char *shstr::null = makenull (); |
46 | const shstr undead_name ("undead"); |
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47 | |
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48 | shstr skill_names[NUM_SKILLS]; |
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49 | |
62 | |
50 | const char * |
63 | const char * |
51 | shstr::find (const char *s) |
64 | shstr::find (const char *s) |
52 | { |
65 | { |
53 | if (!s) |
66 | if (!s) |
54 | return s; |
67 | return s; |
55 | |
68 | |
56 | HT::iterator i = ht.find (s); |
69 | auto (i, ht.find (s)); |
57 | |
70 | |
58 | return i != ht.end ()? *i : 0; |
71 | return i != ht.end ()? *i : 0; |
59 | } |
72 | } |
60 | |
73 | |
61 | const char * |
74 | const char * |
… | |
… | |
78 | // periodically test refcounts == 0 for a few strings |
91 | // periodically test refcounts == 0 for a few strings |
79 | // this is the ONLY thing that erases stuff from ht. keep it that way. |
92 | // this is the ONLY thing that erases stuff from ht. keep it that way. |
80 | void |
93 | void |
81 | shstr::gc () |
94 | shstr::gc () |
82 | { |
95 | { |
83 | return; //D |
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84 | //D currently disabled: some datastructures might still store them |
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85 | //D but their pointers will become invalidated |
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86 | static const char *curpos; |
96 | static const char *curpos; |
87 | |
97 | |
88 | HT::iterator i = curpos ? ht.find (curpos) : ht.begin (); |
98 | auto (i, curpos ? ht.find (curpos) : ht.begin ()); |
89 | |
99 | |
90 | if (i == ht.end ()) |
100 | if (i == ht.end ()) |
91 | i = ht.begin (); |
101 | i = ht.begin (); |
92 | |
102 | |
93 | // go through all strings roughly once every 4 minutes |
103 | // go through all strings roughly once every 4 minutes |
… | |
… | |
102 | } |
112 | } |
103 | else if (!--n) |
113 | else if (!--n) |
104 | break; |
114 | break; |
105 | else if (!refcnt (*i)) |
115 | else if (!refcnt (*i)) |
106 | { |
116 | { |
107 | HT::iterator o = i++; |
117 | auto (o, i++); |
108 | const char *s = *o; |
118 | const char *s = *o; |
109 | |
119 | |
110 | ht.erase (o); |
120 | ht.erase (o); |
111 | |
121 | |
112 | //printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s)); |
122 | //printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s)); |
… | |
… | |
117 | } |
127 | } |
118 | |
128 | |
119 | curpos = *i; |
129 | curpos = *i; |
120 | } |
130 | } |
121 | |
131 | |
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132 | shstr skill_names[NUM_SKILLS]; |
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133 | |
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134 | // what weird misoptimisation is this again? |
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135 | const shstr undead_name ("undead"); |
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136 | |
122 | //TODO: this should of course not be here |
137 | //TODO: this should of course not be here |
123 | |
138 | |
124 | /* buf_overflow() - we don't want to exceed the buffer size of |
139 | /* buf_overflow() - we don't want to exceed the buffer size of |
125 | * buf1 by adding on buf2! Returns true if overflow will occur. |
140 | * buf1 by adding on buf2! Returns true if overflow will occur. |
126 | */ |
141 | */ |
127 | |
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128 | int |
142 | int |
129 | buf_overflow (const char *buf1, const char *buf2, int bufsize) |
143 | buf_overflow (const char *buf1, const char *buf2, int bufsize) |
130 | { |
144 | { |
131 | int len1 = 0, len2 = 0; |
145 | int len1 = 0, len2 = 0; |
132 | |
146 | |
… | |
… | |
134 | len1 = strlen (buf1); |
148 | len1 = strlen (buf1); |
135 | if (buf2) |
149 | if (buf2) |
136 | len2 = strlen (buf2); |
150 | len2 = strlen (buf2); |
137 | if ((len1 + len2) >= bufsize) |
151 | if ((len1 + len2) >= bufsize) |
138 | return 1; |
152 | return 1; |
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153 | |
139 | return 0; |
154 | return 0; |
140 | } |
155 | } |