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Comparing deliantra/server/include/dynbuf.h (file contents):
Revision 1.7 by root, Thu May 3 09:26:45 2007 UTC vs.
Revision 1.23 by root, Thu Oct 15 21:09:32 2009 UTC

1/*
2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 *
4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 *
8 * Deliantra is free software: you can redistribute it and/or modify it under
9 * the terms of the Affero GNU General Public License as published by the
10 * Free Software Foundation, either version 3 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the Affero GNU General Public License
19 * and the GNU General Public License along with this program. If not, see
20 * <http://www.gnu.org/licenses/>.
21 *
22 * The authors can be reached via e-mail to <support@deliantra.net>
23 */
24
1#ifndef DYNBUF_H__ 25#ifndef DYNBUF_H__
2#define DYNBUF_H__ 26#define DYNBUF_H__
3 27
4#include <cstring> 28#include <cstring>
5#include <cassert> 29#include <cassert>
6 30
31#include "util.h"
7#include "shstr.h" 32#include "shstr.h"
8 33
9// this is a "buffer" that can grow fast 34// this is a "buffer" that can grow fast
10// and is still somewhat space-efficient. 35// and is still somewhat space-efficient.
11// unlike obstacks or other data structures, 36// unlike obstacks or other data structures,
… …
22 int size; 47 int size;
23 char data[0]; 48 char data[0];
24 }; 49 };
25 50
26 char *ptr, *end; 51 char *ptr, *end;
27 int ext;
28 int _size; 52 int _size;
29 53
54 int extend, cextend;
30 chunk *first, *last; 55 chunk *first, *last;
31 56
32 void _reserve (int size); 57 void reserve (int size);
33 void _clear (); 58 void init (int initial); // allocate sinitial chunk
34 void clear (); 59 void free (chunk *&chain); // free chain of chunks
60 char *_linearise ();
35 void finish (); 61 void finalise ();
36 62
37public: 63public:
38 64
65 // initial - the size of the initial chunk to be allocated
66 // extend - first incremental step when buffer size exceeded
39 dynbuf (int initial = 4096, int extend = 16384); 67 dynbuf (int initial = 4096, int extend = 16384)
68 : extend (extend)
69 {
70 init (initial);
71 }
72
40 ~dynbuf (); 73 ~dynbuf ()
74 {
75 free (first);
76 }
77
78 // resets the dynbuf, but does not free the first chunk
79 // which is either of size "initial" or the size of the last
80 // linearise
81 void clear ();
41 82
42 int size () const { return _size + (ptr - last->data); } 83 int size () const { return _size + (ptr - last->data); }
43 bool empty () const { return !size (); } 84 bool empty () const { return !size (); }
44 85
45 void linearise (void *data); 86 void linearise (void *data);
46 char *linearise (); // does not 0-terminate(!) 87 char *linearise () // does not 0-terminate(!)
88 {
89 return first->next ? _linearise () : first->data;
90 }
47 91
48 int room () const { return end - ptr; } 92 int room () const { return end - ptr; }
49 93
50 char *force (int size) 94 char *force (int size)
51 { 95 {
52 if (ptr + size >= end) 96 if (expect_false (ptr + size >= end))
53 _reserve (size); 97 reserve (size);
54 98
55 return ptr; 99 return ptr;
56 } 100 }
57 101
102 char *falloc (int size)
103 {
104 char *res = ptr;
105 ptr += size;
106 return res;
107 }
108
58 char *alloc (int size) 109 char *alloc (int size)
59 { 110 {
60 char *res = force (size); 111 force (size);
61 ptr += size; 112 return falloc (size);
62 return res;
63 } 113 }
64 114
65 void fadd (char c) { *ptr++ = c; } 115 void fadd (char c) { *ptr++ = c; }
66 void fadd (unsigned char c) { fadd (char (c)); } 116 void fadd (unsigned char c) { fadd (char (c)); }
117 void fadd (const void *p, int len)
118 {
119 memcpy (falloc (len), p, len);
120 }
67 121
68 void add (const void *p, int len) 122 void add (const void *p, int len)
69 { 123 {
70 memcpy (alloc (len), p, len); 124 force (len);
125 fadd (p, len);
71 } 126 }
72 127
73 void add (char c) 128 void add (char c)
74 { 129 {
75 alloc (1)[0] = c; 130 alloc (1)[0] = c;
… …
78 void add (const char *s) 133 void add (const char *s)
79 { 134 {
80 add (s, strlen (s)); 135 add (s, strlen (s));
81 } 136 }
82 137
83 void add (const shstr &s) 138 void add (shstr_tmp s)
84 { 139 {
85 add (s.s, s.length ()); 140 add (s.s, s.length ());
86 } 141 }
87 142
88 //TODO 143 //TODO
89 //void add_destructive (dynbuf &buf); 144 //void add_destructive (dynbuf &buf);
90 145
91 dynbuf &operator << (char c) { add (c); return *this; } 146 dynbuf &operator << (char c) { add (c); return *this; }
92 dynbuf &operator << (unsigned char c) { return *this << char (c); } 147 dynbuf &operator << (unsigned char c) { return *this << char (c); }
93 dynbuf &operator << (const char *s) { add (s); return *this; } 148 dynbuf &operator << (const char *s) { add (s); return *this; }
94 dynbuf &operator << (const shstr &s) { add (s); return *this; } 149 dynbuf &operator << (shstr_tmp s) { add (s); return *this; }
95 dynbuf &operator << (const std::string &s) { add (s.data(), s.size ()); return *this; } 150 dynbuf &operator << (const std::string &s) { add (s.data(), s.size ()); return *this; }
96 151
97 operator std::string (); 152 operator std::string ();
98}; 153};
99 154
… …
102 dynbuf_text (int initial = 4096, int extend = 16384) 157 dynbuf_text (int initial = 4096, int extend = 16384)
103 : dynbuf (initial, extend) 158 : dynbuf (initial, extend)
104 { } 159 { }
105 160
106 using dynbuf::add; 161 using dynbuf::add;
107
108 static const int max_sint32_size = 11;
109 static const int max_sint64_size = 20;
110
111 void add (sint32 i); 162 void add (sint32 i);
112 void add (sint64 i); 163 void add (sint64 i);
113 164
165 //TODO: should optimise the case printf "(name %+d)" as it comes up extremely often
166
167 //using dynbuf::operator <<; // doesn't work, sometimes C++ just suxx
168 // instead we use an ugly template function
169 template<typename T>
170 dynbuf_text &operator << (T c) { *(dynbuf *)this << c; return *this; }
171
172 dynbuf_text &operator << (sint16 i) { add (sint32 (i)); return *this; }
173 dynbuf_text &operator << (uint16 i) { add (sint32 (i)); return *this; }
174 dynbuf_text &operator << (sint32 i) { add (sint32 (i)); return *this; }
175 dynbuf_text &operator << (sint64 i) { add (sint64 (i)); return *this; }
176 dynbuf_text &operator << (uint32 i) { add (sint64 (i)); return *this; }
177 dynbuf_text &operator << (uint64 i) { add (sint64 (i)); return *this; }
178
114 void printf (const char *format, ...); 179 void printf (const char *format, ...);
180 void vprintf (const char *format, va_list ap);
181
182 void add_abilities (const char *name, uint32 abilities);
183 void add_paths (const char *name, uint32 paths);
184
185 // returns the string, linearised and with trailing \0
186 operator char *();
115}; 187};
116 188
117#endif 189#endif
118 190

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