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Comparing deliantra/server/include/shstr.h (file contents):
Revision 1.25 by root, Wed Dec 31 18:07:41 2008 UTC vs.
Revision 1.40 by root, Sat Apr 23 04:56:50 2011 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 (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * 5 *
6 * Deliantra is free software: you can redistribute it and/or modify 6 * Deliantra is free software: you can redistribute it and/or modify it under
7 * it under the terms of the GNU General Public License as published by 7 * the terms of the Affero GNU General Public License as published by the
8 * the Free Software Foundation, either version 3 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
9 * (at your option) any later version. 9 * option) any later version.
10 * 10 *
11 * This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details. 14 * GNU General Public License for more details.
15 * 15 *
16 * You should have received a copy of the GNU General Public License 16 * You should have received a copy of the Affero GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>.
18 * 19 *
19 * The authors can be reached via e-mail to <support@deliantra.net> 20 * The authors can be reached via e-mail to <support@deliantra.net>
20 */ 21 */
21 22
22#ifndef SHSTR_H__ 23#ifndef SHSTR_H__
… …
32extern int buf_overflow (const char *buf1, const char *buf2, int bufsize); 33extern int buf_overflow (const char *buf1, const char *buf2, int bufsize);
33 34
34template<int size> 35template<int size>
35struct shstr_vec 36struct shstr_vec
36{ 37{
38 uint32_t hash;
37 uint32_t len; 39 uint32_t len;
38 uint32_t refcnt; 40 uint32_t refcnt;
41 // pointer points here
39 char string[size]; 42 char string [size];
40}; 43};
41 44
42// this class is a non-refcounted shared string 45// this class is a non-refcounted shared string
43// it cannot be used to create or store shared strings, but 46// it cannot be used to create or store shared strings, but
44// it can be used to apss shared strings around, i.e. as function arguments 47// it can be used to pass shared strings around, i.e. as function arguments
45// or return values. their lifetime must not span a gc () call, i.e. 48// or return values. their lifetime must not span a gc () call, i.e.
46// they are only valid as temporary values within the same server tick. 49// they are only valid as temporary values within the same server tick.
47struct shstr_tmp 50struct shstr_tmp
48{ 51{
49 static shstr_vec<sizeof ("(null)")> nullvec; 52 static shstr_vec<sizeof ("(null)")> nullvec;
50 static const char *null () { return nullvec.string; } // this is the null pointer value 53 static const char *null () { return nullvec.string; } // this is the null pointer value
51 54
52 const char *s; 55 const char *s;
53 56
57 static unsigned int &hash (const char *s)
58 {
59 return *((unsigned int *)s - 3);
60 }
61
62 int hash () const
63 {
64 return hash (s);
65 }
66
54 static unsigned int &length (const char *s) 67 static unsigned int &length (const char *s)
55 { 68 {
56 return *((unsigned int *)s - 2); 69 return *((unsigned int *)s - 2);
57 } 70 }
58 71
… …
68 int plen = strlen (prefix); 81 int plen = strlen (prefix);
69 82
70 return length () >= plen && !strncasecmp (s, prefix, plen); 83 return length () >= plen && !strncasecmp (s, prefix, plen);
71 } 84 }
72 85
86 // returns true if the substring is contained in the shstr
87 // if the shstr is 0, then this always returns false.
88 // the shstr is (theoretically) treated as a comma/colon/space etc. separated list.
73 bool contains (const char *substring) const 89 bool contains (const char *substring) const;
90
91 //TODO: case sensitive should be eradicated
92 bool eq_nc (const char *otherstring) const
74 { 93 {
75 return strstr (s, substring); 94 return !strcasecmp (s, otherstring);
76 } 95 }
77 96
78 shstr_tmp () 97 shstr_tmp ()
79 : s (null ()) 98 : s (null ())
80 { 99 {
… …
94 113
95 // this is used for informational messages and the like 114 // this is used for informational messages and the like
96 const char *operator &() const { return s; } 115 const char *operator &() const { return s; }
97 116
98 operator const char *() const { return s == null () ? 0 : s; } 117 operator const char *() const { return s == null () ? 0 : s; }
118
119protected:
120 // dummy is there so it isn't used as type converter accidentally
121 shstr_tmp (int dummy, const char *s)
122 : s(s)
123 {
124 }
99}; 125};
100 126
101inline bool operator ==(const shstr_tmp &a, const shstr_tmp &b) 127inline bool operator ==(const shstr_tmp &a, const shstr_tmp &b)
102{ 128{
103 return a.s == b.s; 129 return a.s == b.s;
… …
106inline bool operator !=(const shstr_tmp &a, const shstr_tmp &b) 132inline bool operator !=(const shstr_tmp &a, const shstr_tmp &b)
107{ 133{
108 return a.s != b.s; 134 return a.s != b.s;
109} 135}
110 136
111inline int strlen (const shstr_tmp &sh) 137inline int strlen (shstr_tmp sh)
112{ 138{
113 return sh.length (); 139 return sh.length ();
114} 140}
115 141
116// undefined external reference to catch people using strcmp when they shouldn't
117int strcmp (const shstr_tmp &a, const shstr_tmp &b);
118
119static std::ostream &operator <<(std::ostream &o, shstr_tmp sh) 142static inline std::ostream &operator <<(std::ostream &o, shstr_tmp sh)
120{ 143{
121 o.write (sh.s, sh.length ()); 144 o.write (sh.s, sh.length ());
122 145
123 return o; 146 return o;
124} 147}
… …
155 { 178 {
156 ++refcnt (); 179 ++refcnt ();
157 } 180 }
158 181
159 explicit shstr (const char *str) 182 explicit shstr (const char *str)
160 {
161 s = is_constant (str) && !str ? null () : intern (str); 183 : shstr_tmp (0, is_constant (str) && !str ? null () : intern (str))
184 {
162 } 185 }
163 186
164 ~shstr () 187 ~shstr ()
165 { 188 {
166 --refcnt (); 189 --refcnt ();
… …
199// temporary passing, basically a non-refcounted shstr 222// temporary passing, basically a non-refcounted shstr
200struct shstr_cmp 223struct shstr_cmp
201{ 224{
202 const char *s; 225 const char *s;
203 226
227 // initialies to the non-matching string (as opposed to the null string)
228 shstr_cmp ()
229 {
230 s = 0;
231 }
232
204 explicit shstr_cmp (const char *str) 233 shstr_cmp (const char *str)
205 : s (shstr::find (str)) 234 : s (shstr::find (str))
206 { 235 {
207 } 236 }
208 237
209 shstr_cmp (shstr_tmp sh) 238 shstr_cmp (shstr_tmp sh)
… …
225inline bool operator ==(const shstr_tmp &a, const shstr_cmp &b) 254inline bool operator ==(const shstr_tmp &a, const shstr_cmp &b)
226{ 255{
227 return a.s == b.s; 256 return a.s == b.s;
228} 257}
229 258
230#define def(str) extern const shstr shstr_ ## str; 259#define def2(id,str) extern const shstr id;
260#define def(id) def2(shstr_ ## id, # id)
231# include "shstrinc.h" 261# include "shstrinc.h"
232#undef def 262#undef def
263#undef def2
264
265// undefined external reference to catch people using str* functions when they shouldn't
266//template<class any> void strcmp (const shstr_tmp &a, any b);
267template<class any> void strstr (const shstr_tmp &a, any b);
233 268
234#endif 269#endif
235 270

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