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Comparing deliantra/server/include/shstr.h (file contents):
Revision 1.34 by root, Tue Nov 3 23:44:21 2009 UTC vs.
Revision 1.46 by root, Tue Nov 27 18:47:35 2018 UTC

1/* 1/*
2 * This file is part of Deliantra, the Roguelike Realtime MMORPG. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
4 * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * 6 *
6 * Deliantra is free software: you can redistribute it and/or modify it under 7 * Deliantra is free software: you can redistribute it and/or modify it under
7 * the terms of the Affero GNU General Public License as published by the 8 * the terms of the Affero GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or (at your 9 * Free Software Foundation, either version 3 of the License, or (at your
9 * option) any later version. 10 * option) any later version.
10 * 11 *
11 * This program is distributed in the hope that it will be useful, 12 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details. 15 * GNU General Public License for more details.
15 * 16 *
16 * You should have received a copy of the Affero GNU General Public License 17 * You should have received a copy of the Affero GNU General Public License
17 * and the GNU General Public License along with this program. If not, see 18 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>. 19 * <http://www.gnu.org/licenses/>.
19 * 20 *
20 * The authors can be reached via e-mail to <support@deliantra.net> 21 * The authors can be reached via e-mail to <support@deliantra.net>
21 */ 22 */
22 23
23#ifndef SHSTR_H__ 24#ifndef SHSTR_H__
24#define SHSTR_H__ 25#define SHSTR_H__
… …
33extern int buf_overflow (const char *buf1, const char *buf2, int bufsize); 34extern int buf_overflow (const char *buf1, const char *buf2, int bufsize);
34 35
35template<int size> 36template<int size>
36struct shstr_vec 37struct shstr_vec
37{ 38{
39 uint32_t hash;
38 uint32_t len; 40 uint32_t len;
39 uint32_t refcnt; 41 uint32_t refcnt;
42 // pointer points here
40 char string[size]; 43 char string [size];
41}; 44};
42 45
43// this class is a non-refcounted shared string 46// this class is a non-refcounted shared string
44// it cannot be used to create or store shared strings, but 47// it cannot be used to create or store shared strings, but
45// it can be used to apss shared strings around, i.e. as function arguments 48// it can be used to pass shared strings around, i.e. as function arguments
46// or return values. their lifetime must not span a gc () call, i.e. 49// or return values. their lifetime must not span a gc () call, i.e.
47// they are only valid as temporary values within the same server tick. 50// they are only valid as temporary values within the same server tick.
48struct shstr_tmp 51struct shstr_tmp
49{ 52{
50 static shstr_vec<sizeof ("(null)")> nullvec; 53 static shstr_vec<sizeof ("(null)")> nullvec;
51 static const char *null () { return nullvec.string; } // this is the null pointer value 54 static const char *null () { return nullvec.string; } // this is the null pointer value
52 55
53 const char *s; 56 const char *s;
54 57
58 static unsigned int &hash (const char *s)
59 {
60 return *((unsigned int *)s - 3);
61 }
62
63 int hash () const
64 {
65 return hash (s);
66 }
67
55 static unsigned int &length (const char *s) 68 static unsigned int &length (const char *s)
56 { 69 {
57 return *((unsigned int *)s - 2); 70 return *((unsigned int *)s - 2);
58 } 71 }
59 72
… …
72 } 85 }
73 86
74 // returns true if the substring is contained in the shstr 87 // returns true if the substring is contained in the shstr
75 // if the shstr is 0, then this always returns false. 88 // if the shstr is 0, then this always returns false.
76 // the shstr is (theoretically) treated as a comma/colon/space etc. separated list. 89 // the shstr is (theoretically) treated as a comma/colon/space etc. separated list.
77 bool contains (const char *substring) const 90 bool contains (const char *substring) const;
78 {
79 return s != null () && strstr (s, substring);
80 }
81 91
82 //TODO: case sensitive should be eradicated 92 //TODO: case sensitive should be eradicated
83 bool eq_nc (const char *otherstring) const 93 bool eq_nc (const char *otherstring) const
84 { 94 {
85 return !strcasecmp (s, otherstring); 95 return !strcasecmp (s, otherstring);
… …
128inline int strlen (shstr_tmp sh) 138inline int strlen (shstr_tmp sh)
129{ 139{
130 return sh.length (); 140 return sh.length ();
131} 141}
132 142
133static std::ostream &operator <<(std::ostream &o, shstr_tmp sh) 143static inline std::ostream &operator <<(std::ostream &o, shstr_tmp sh)
134{ 144{
135 o.write (sh.s, sh.length ()); 145 o.write (sh.s, sh.length ());
136 146
137 return o; 147 return o;
138} 148}
… …
156 static const char *find (const char *s); 166 static const char *find (const char *s);
157 static const char *intern (const char *s); 167 static const char *intern (const char *s);
158 168
159 static void gc (); // garbage collect a few strings 169 static void gc (); // garbage collect a few strings
160 170
161 shstr (const shstr &sh)
162 : shstr_tmp (sh)
163 {
164 ++refcnt ();
165 }
166
167 shstr (const shstr_tmp &sh) 171 shstr (const shstr_tmp &sh)
168 : shstr_tmp (sh) 172 : shstr_tmp (sh)
169 { 173 {
170 ++refcnt (); 174 ++refcnt ();
171 } 175 }
172 176
173 explicit shstr (const char *str) 177 explicit shstr (const char *str)
174 : shstr_tmp (0, is_constant (str) && !str ? null () : intern (str)) 178 : shstr_tmp (0, ecb_is_constant (str) && !str ? null () : intern (str))
175 { 179 {
176 } 180 }
177 181
178 ~shstr () 182 ~shstr ()
179 { 183 {
… …
201 205
202 // shstr_tmp doesn't have this one 206 // shstr_tmp doesn't have this one
203 shstr &operator =(const char *str) 207 shstr &operator =(const char *str)
204 { 208 {
205 --refcnt (); 209 --refcnt ();
206 s = is_constant (str) && !str ? null () : intern (str); 210 s = ecb_is_constant (str) && !str ? null () : intern (str);
207 211
208 return *this; 212 return *this;
209 } 213 }
210}; 214};
211 215

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