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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 1.38 by root, Fri Mar 26 01:04:44 2010 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 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
74 { 90 {
75 return strstr (s, substring); 91 return s != null () && strstr (s, substring);
92 }
93
94 //TODO: case sensitive should be eradicated
95 bool eq_nc (const char *otherstring) const
96 {
97 return !strcasecmp (s, otherstring);
76 } 98 }
77 99
78 shstr_tmp () 100 shstr_tmp ()
79 : s (null ()) 101 : s (null ())
80 { 102 {
… …
94 116
95 // this is used for informational messages and the like 117 // this is used for informational messages and the like
96 const char *operator &() const { return s; } 118 const char *operator &() const { return s; }
97 119
98 operator const char *() const { return s == null () ? 0 : s; } 120 operator const char *() const { return s == null () ? 0 : s; }
121
122protected:
123 // dummy is there so it isn't used as type converter accidentally
124 shstr_tmp (int dummy, const char *s)
125 : s(s)
126 {
127 }
99}; 128};
100 129
101inline bool operator ==(const shstr_tmp &a, const shstr_tmp &b) 130inline bool operator ==(const shstr_tmp &a, const shstr_tmp &b)
102{ 131{
103 return a.s == b.s; 132 return a.s == b.s;
… …
106inline bool operator !=(const shstr_tmp &a, const shstr_tmp &b) 135inline bool operator !=(const shstr_tmp &a, const shstr_tmp &b)
107{ 136{
108 return a.s != b.s; 137 return a.s != b.s;
109} 138}
110 139
111inline int strlen (const shstr_tmp &sh) 140inline int strlen (shstr_tmp sh)
112{ 141{
113 return sh.length (); 142 return sh.length ();
114} 143}
115 144
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) 145static inline std::ostream &operator <<(std::ostream &o, shstr_tmp sh)
120{ 146{
121 o.write (sh.s, sh.length ()); 147 o.write (sh.s, sh.length ());
122 148
123 return o; 149 return o;
124} 150}
… …
155 { 181 {
156 ++refcnt (); 182 ++refcnt ();
157 } 183 }
158 184
159 explicit shstr (const char *str) 185 explicit shstr (const char *str)
160 {
161 s = is_constant (str) && !str ? null () : intern (str); 186 : shstr_tmp (0, is_constant (str) && !str ? null () : intern (str))
187 {
162 } 188 }
163 189
164 ~shstr () 190 ~shstr ()
165 { 191 {
166 --refcnt (); 192 --refcnt ();
… …
199// temporary passing, basically a non-refcounted shstr 225// temporary passing, basically a non-refcounted shstr
200struct shstr_cmp 226struct shstr_cmp
201{ 227{
202 const char *s; 228 const char *s;
203 229
230 // initialies to the non-matching string (as opposed to the null string)
231 shstr_cmp ()
232 {
233 s = 0;
234 }
235
204 explicit shstr_cmp (const char *str) 236 shstr_cmp (const char *str)
205 : s (shstr::find (str)) 237 : s (shstr::find (str))
206 { 238 {
207 } 239 }
208 240
209 shstr_cmp (shstr_tmp sh) 241 shstr_cmp (shstr_tmp sh)
… …
225inline bool operator ==(const shstr_tmp &a, const shstr_cmp &b) 257inline bool operator ==(const shstr_tmp &a, const shstr_cmp &b)
226{ 258{
227 return a.s == b.s; 259 return a.s == b.s;
228} 260}
229 261
230#define def(str) extern const shstr shstr_ ## str; 262#define def2(id,str) extern const shstr id;
263#define def(id) def2(shstr_ ## id, # id)
231# include "shstrinc.h" 264# include "shstrinc.h"
232#undef def 265#undef def
266#undef def2
267
268// undefined external reference to catch people using str* functions when they shouldn't
269//template<class any> void strcmp (const shstr_tmp &a, any b);
270template<class any> void strstr (const shstr_tmp &a, any b);
233 271
234#endif 272#endif
235 273

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