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1 | /* |
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2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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3 | * |
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4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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5 | * |
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6 | * Deliantra is free software: you can redistribute it and/or modify it under |
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7 | * the terms of the Affero GNU General Public License as published by the |
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8 | * Free Software Foundation, either version 3 of the License, or (at your |
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9 | * 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 Affero GNU General Public License |
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17 | * and the GNU General Public License along with this program. If not, see |
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18 | * <http://www.gnu.org/licenses/>. |
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19 | * |
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20 | * The authors can be reached via e-mail to <support@deliantra.net> |
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21 | */ |
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22 | |
| 1 | #include "global.h" |
23 | #include "global.h" |
| 2 | |
24 | |
| 3 | #include <cstdio> |
25 | #include <cstdio> |
| 4 | |
26 | |
| 5 | dynbuf::dynbuf (int initial, int extend) |
27 | void |
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28 | dynbuf::init (int initial) |
| 6 | { |
29 | { |
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30 | cextend = extend; |
| 7 | _size = 0; |
31 | _size = 0; |
| 8 | ext = extend; |
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| 9 | |
32 | |
| 10 | first = last = (chunk *)salloc<char> (sizeof (chunk) + initial); |
33 | first = last = (chunk *)salloc<char> (sizeof (chunk) + initial); |
| 11 | first->alloc = sizeof (chunk) + initial; |
34 | first->alloc = sizeof (chunk) + initial; |
| 12 | first->next = 0; |
35 | first->next = 0; |
| 13 | |
36 | |
| 14 | ptr = first->data; |
37 | ptr = first->data; |
| 15 | end = ptr + initial; |
38 | end = ptr + initial; |
| 16 | } |
39 | } |
| 17 | |
40 | |
| 18 | dynbuf::~dynbuf () |
41 | // frees a full chain and sets the pointer to zero |
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42 | void |
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43 | dynbuf::free (chunk *&chain) |
| 19 | { |
44 | { |
| 20 | clear (); |
45 | while (chain) |
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46 | { |
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47 | chunk *next = chain->next; |
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48 | |
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49 | sfree<char> ((char *)chain, chain->alloc); |
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50 | chain = next; |
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51 | } |
| 21 | } |
52 | } |
| 22 | |
53 | |
| 23 | void |
54 | void |
| 24 | dynbuf::clear () |
55 | dynbuf::clear () |
| 25 | { |
56 | { |
| 26 | while (first) |
57 | cextend = extend; |
| 27 | { |
58 | free (first->next); |
| 28 | chunk *next = first->next; |
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| 29 | |
59 | |
| 30 | sfree<char> ((char *)first, first->alloc); |
60 | _size = 0; |
| 31 | first = next; |
61 | ptr = first->data; |
| 32 | } |
62 | end = ptr + first->alloc - sizeof (chunk); |
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63 | last = first; |
| 33 | } |
64 | } |
| 34 | |
65 | |
| 35 | void |
66 | void |
| 36 | dynbuf::finish () |
67 | dynbuf::finalise () |
| 37 | { |
68 | { |
| 38 | // finalise current chunk |
69 | // finalise current chunk |
| 39 | _size += last->size = ptr - last->data; |
70 | _size += last->size = ptr - last->data; |
| 40 | } |
71 | } |
| 41 | |
72 | |
| 42 | void |
73 | void |
| 43 | dynbuf::_reserve (int size) |
74 | dynbuf::reserve (int size) |
| 44 | { |
75 | { |
| 45 | finish (); |
76 | finalise (); |
| 46 | |
77 | |
| 47 | do |
78 | do |
| 48 | { |
79 | { |
| 49 | ext += ext >> 1; |
80 | cextend += cextend >> 1; |
| 50 | ext = (ext + 15) & ~15; |
81 | cextend = (cextend + 15) & ~15; |
| 51 | } |
82 | } |
| 52 | while (ext < size); |
83 | while (cextend < size); |
| 53 | |
84 | |
| 54 | chunk *add = (chunk *) salloc<char> (sizeof (chunk) + ext); |
85 | chunk *add = (chunk *) salloc<char> (sizeof (chunk) + cextend); |
| 55 | add->alloc = sizeof (chunk) + ext; |
86 | add->alloc = sizeof (chunk) + cextend; |
| 56 | add->next = 0; |
87 | add->next = 0; |
| 57 | |
88 | |
| 58 | last->next = add; |
89 | last->next = add; |
| 59 | last = add; |
90 | last = add; |
| 60 | |
91 | |
| 61 | ptr = last->data; |
92 | ptr = last->data; |
| 62 | end = ptr + ext; |
93 | end = ptr + cextend; |
| 63 | } |
94 | } |
| 64 | |
95 | |
| 65 | void |
96 | void |
| 66 | dynbuf::linearise (void *data) |
97 | dynbuf::linearise (void *data) |
| 67 | { |
98 | { |
| 68 | char *p = (char *) data; |
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| 69 | |
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| 70 | last->size = ptr - last->data; |
99 | last->size = ptr - last->data; |
| 71 | |
100 | |
| 72 | for (chunk * c = first; c; c = c->next) |
101 | for (chunk *c = first; c; c = c->next) |
| 73 | { |
102 | { |
| 74 | memcpy (p, c->data, c->size); |
103 | memcpy (data, c->data, c->size); |
| 75 | p += c->size; |
104 | data = (void *)(((char *)data) + c->size); |
| 76 | } |
105 | } |
| 77 | } |
106 | } |
| 78 | |
107 | |
| 79 | char * |
108 | char * |
| 80 | dynbuf::linearise () |
109 | dynbuf::_linearise (int extra) |
| 81 | { |
110 | { |
| 82 | if (first->next) |
111 | finalise (); |
| 83 | { |
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| 84 | finish (); |
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| 85 | |
112 | |
| 86 | chunk *add = (chunk *) salloc<char> (sizeof (chunk) + _size); |
113 | chunk *add = (chunk *) salloc<char> (sizeof (chunk) + _size + extra); |
| 87 | add->alloc = sizeof (chunk) + _size; |
114 | add->alloc = sizeof (chunk) + _size; |
| 88 | add->next = 0; |
115 | add->next = 0; |
| 89 | |
116 | |
| 90 | linearise ((void *)add->data); |
117 | linearise ((void *)add->data); |
| 91 | clear (); |
118 | free (first); |
| 92 | |
119 | |
| 93 | first = last = add; |
120 | first = last = add; |
| 94 | ptr = last->data + _size; |
121 | ptr = last->data + _size; |
| 95 | end = ptr; |
122 | end = ptr + extra; |
| 96 | _size = 0; |
123 | _size = 0; |
| 97 | } |
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| 98 | |
124 | |
| 99 | return first->data; |
125 | return first->data; |
| 100 | } |
126 | } |
| 101 | |
127 | |
| 102 | dynbuf::operator std::string () |
128 | dynbuf::operator std::string () |
| … | |
… | |
| 104 | // could optimise |
130 | // could optimise |
| 105 | return std::string (linearise (), size ()); |
131 | return std::string (linearise (), size ()); |
| 106 | } |
132 | } |
| 107 | |
133 | |
| 108 | void |
134 | void |
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135 | dynbuf::splice (int offset, int olen, const char *s, int slen) |
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136 | { |
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137 | // how much bytes to extend (negative if shrinking) |
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138 | int adjust = slen - olen; |
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139 | |
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140 | // linearise, unless everything fits in the last chunk |
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141 | if (offset < _size || room () < adjust) |
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142 | _linearise (max (adjust, 0)); |
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143 | |
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144 | offset -= _size; // offset into chunk |
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145 | |
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146 | // now move tail to final position |
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147 | char *pos = last->data + offset; |
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148 | char *src = pos + olen; |
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149 | char *dst = pos + slen; |
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150 | memmove (dst, src, ptr - src); |
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151 | |
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152 | // now copy new content |
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153 | memcpy (pos, s, slen); |
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154 | |
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155 | // finally adjust length |
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156 | ptr += adjust; |
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157 | } |
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158 | |
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159 | void |
| 109 | dynbuf_text::printf (const char *format, ...) |
160 | dynbuf_text::vprintf (const char *format, va_list ap) |
| 110 | { |
161 | { |
| 111 | int len; |
162 | int len; |
| 112 | |
163 | |
| 113 | { |
164 | { |
| 114 | force (128); |
165 | force (128); |
| 115 | |
166 | |
| 116 | va_list ap; |
167 | va_list apc; |
| 117 | va_start (ap, format); |
168 | va_copy (apc, ap); |
| 118 | len = vsnprintf (ptr, end - ptr, format, ap); |
169 | len = vsnprintf (ptr, end - ptr, format, apc); |
| 119 | va_end (ap); |
170 | va_end (apc); |
| 120 | |
171 | |
| 121 | assert (len >= 0); // shield against broken vsnprintf's |
172 | assert (len >= 0); // shield against broken vsnprintf's |
| 122 | |
173 | |
| 123 | // was enough room available |
174 | // was enough room available |
| 124 | if (ptr + len < end) |
175 | if (ptr + len < end) |
| 125 | { |
176 | { |
| 126 | alloc (len); |
177 | ptr += len; |
| 127 | return; |
178 | return; |
| 128 | } |
179 | } |
| 129 | } |
180 | } |
| 130 | |
181 | |
| 131 | // longer, try harder |
182 | // longer, try harder |
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183 | vsnprintf (force (len + 1), len + 1, format, ap); |
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184 | |
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185 | ptr += len; |
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186 | } |
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187 | |
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188 | void |
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189 | dynbuf_text::printf (const char *format, ...) |
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190 | { |
| 132 | va_list ap; |
191 | va_list ap; |
| 133 | va_start (ap, format); |
192 | va_start (ap, format); |
| 134 | vsnprintf (force (len + 1), len + 1, format, ap); |
193 | vprintf (format, ap); |
| 135 | va_end (ap); |
194 | va_end (ap); |
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195 | } |
| 136 | |
196 | |
| 137 | alloc (len); |
197 | // simply return a mask with "bits" bits set |
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198 | static inline uint64 |
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199 | m (int b) |
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200 | { |
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201 | return (uint64 (1) << b) - 1; |
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202 | } |
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203 | |
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204 | // convert 9 digits to ascii, using only a single multiplication |
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205 | // (depending on cpu and compiler). |
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206 | // will generate a single 0 as output when v=lz=0 |
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207 | static inline char * |
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208 | i2a_9 (char *ptr, uint32 v, bool lz) |
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209 | { |
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210 | // convert to 4.56 fixed-point representation |
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211 | // this should be optimal on 64 bit cpus, and rather |
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212 | // slow on 32 bit cpus. go figure :) |
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213 | const int bits = 7*8; // 7 bits per post-comma digit |
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214 | |
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215 | uint64 u = v * ((m (bits) + 100000000) / 100000000); // 10**8 |
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216 | |
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217 | if (lz) |
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218 | { |
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219 | // output leading zeros |
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220 | // good compilers will compile this into only shifts, masks and adds |
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221 | *ptr++ = char (u >> (bits - 0)) + '0'; u = (u & m (bits - 0)) * 5; |
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222 | *ptr++ = char (u >> (bits - 1)) + '0'; u = (u & m (bits - 1)) * 5; |
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223 | *ptr++ = char (u >> (bits - 2)) + '0'; u = (u & m (bits - 2)) * 5; |
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224 | *ptr++ = char (u >> (bits - 3)) + '0'; u = (u & m (bits - 3)) * 5; |
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225 | *ptr++ = char (u >> (bits - 4)) + '0'; u = (u & m (bits - 4)) * 5; |
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226 | *ptr++ = char (u >> (bits - 5)) + '0'; u = (u & m (bits - 5)) * 5; |
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227 | *ptr++ = char (u >> (bits - 6)) + '0'; u = (u & m (bits - 6)) * 5; |
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228 | *ptr++ = char (u >> (bits - 7)) + '0'; u = (u & m (bits - 7)) * 5; |
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229 | *ptr++ = char (u >> (bits - 8)) + '0'; |
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230 | } |
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231 | else |
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232 | { |
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233 | // do not output leading zeroes (except if v == 0) |
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234 | // good compilers will compile this into completely branchless code |
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235 | char digit, nz = 0; |
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236 | |
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237 | digit = (u >> (bits - 0)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 0)) * 5; |
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238 | digit = (u >> (bits - 1)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 1)) * 5; |
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239 | digit = (u >> (bits - 2)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 2)) * 5; |
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240 | digit = (u >> (bits - 3)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 3)) * 5; |
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241 | digit = (u >> (bits - 4)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 4)) * 5; |
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242 | digit = (u >> (bits - 5)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 5)) * 5; |
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243 | digit = (u >> (bits - 6)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 6)) * 5; |
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244 | digit = (u >> (bits - 7)); *ptr = digit + '0'; nz |= digit; ptr += nz ? 1 : 0; u = (u & m (bits - 7)) * 5; |
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245 | digit = (u >> (bits - 8)); *ptr = digit + '0'; nz |= digit; ptr += 1; |
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246 | } |
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247 | |
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248 | return ptr; |
| 138 | } |
249 | } |
| 139 | |
250 | |
| 140 | void |
251 | void |
| 141 | dynbuf_text::add (sint32 i) |
252 | dynbuf_text::add (sint32 i) |
| 142 | { |
253 | { |
| 143 | char buf[max_sint32_size]; |
254 | force (sint32_digits); |
| 144 | char *p = buf + sizeof (buf); |
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| 145 | char neg; |
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| 146 | |
255 | |
| 147 | uint32 val; |
256 | *ptr = '-'; ptr += i < 0 ? 1 : 0; |
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257 | uint32 u = i < 0 ? -i : i; |
| 148 | |
258 | |
| 149 | if (i < 0) |
259 | if (expect_true (u < 10)) // we have a lot of single-digit numbers, so optimise |
| 150 | { |
260 | *ptr++ = u + '0'; |
| 151 | neg = '-'; |
261 | else if (expect_true (u < 100)) // we have a lot of double-digit numbers, too :) |
| 152 | val = -i; |
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| 153 | } |
262 | { |
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263 | // let the compiler figure out sth. efficient here |
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264 | *ptr++ = u / 10 + '0'; |
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265 | *ptr++ = u % 10 + '0'; |
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266 | } |
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267 | else if (expect_true (u < 1000000000)) // 9 0's |
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268 | ptr = i2a_9 (ptr, u, false); |
| 154 | else |
269 | else |
| 155 | { |
270 | { |
| 156 | neg = 0; |
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| 157 | val = i; |
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| 158 | } |
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| 159 | |
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| 160 | do |
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| 161 | { |
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| 162 | uint32 div = val / 10; |
271 | uint32 div = u / 1000000000; |
| 163 | *--p = '0' + char (val - div * 10); |
272 | uint32 rem = u % 1000000000; |
| 164 | |
273 | |
| 165 | val = div; |
274 | ptr = i2a_9 (ptr, div, false); |
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275 | ptr = i2a_9 (ptr, rem, true); |
| 166 | } |
276 | } |
| 167 | while (val); |
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| 168 | |
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| 169 | if (neg) |
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| 170 | *--p = neg; |
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| 171 | |
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| 172 | add ((void *) p, buf + sizeof (buf) - p); |
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| 173 | } |
277 | } |
| 174 | |
278 | |
| 175 | void |
279 | void |
| 176 | dynbuf_text::add (sint64 i) |
280 | dynbuf_text::add (sint64 i) |
| 177 | { |
281 | { |
| 178 | if (i > -10000000 && i < 10000000) |
282 | force (sint64_digits); |
| 179 | { |
283 | |
| 180 | add (sint32 (i)); |
284 | *ptr = '-'; ptr += i < 0 ? 1 : 0; |
| 181 | return; |
285 | uint64 u = i < 0 ? -i : i; |
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286 | |
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287 | // split the number into a 1-digit part |
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288 | // (#19) and two 9 digit parts (9..18 and 0..8) |
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289 | |
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290 | // good compilers will only use multiplications here |
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291 | |
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292 | if (u < 10) // we have a lot of single-digit numbers, so optimise |
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293 | *ptr++ = u + '0'; |
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294 | else if (expect_true (u < 1000000000)) // 9 0's |
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295 | ptr = i2a_9 (ptr, u, false); |
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296 | else if (expect_true (u < UINT64_C (1000000000000000000))) // 18 0's |
| 182 | } |
297 | { |
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298 | uint32 div = u / 1000000000; |
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299 | uint32 rem = u % 1000000000; |
| 183 | |
300 | |
| 184 | char buf[max_sint64_size]; |
301 | ptr = i2a_9 (ptr, div, false); |
| 185 | char *p = buf + sizeof (buf); |
302 | ptr = i2a_9 (ptr, rem, true); |
| 186 | char neg; |
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| 187 | |
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| 188 | uint64 val; |
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| 189 | |
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| 190 | if (i < 0) |
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| 191 | { |
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| 192 | neg = '-'; |
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| 193 | val = -i; |
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| 194 | } |
303 | } |
| 195 | else |
304 | else |
| 196 | { |
305 | { |
| 197 | neg = 0; |
306 | // a biggy, split off the topmost digit |
| 198 | val = i; |
307 | uint32 div = u / UINT64_C (1000000000000000000); |
| 199 | } |
308 | uint64 rem = u % UINT64_C (1000000000000000000); |
| 200 | |
309 | |
| 201 | do |
310 | *ptr++ = div + '0'; |
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311 | |
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312 | u = rem; |
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313 | |
| 202 | { |
314 | { |
| 203 | uint64 div = val / 10; |
315 | uint32 div = u / 1000000000; |
| 204 | *--p = '0' + char (val - div * 10); |
316 | uint32 rem = u % 1000000000; |
| 205 | |
317 | |
| 206 | val = div; |
318 | ptr = i2a_9 (ptr, div, true); |
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319 | ptr = i2a_9 (ptr, rem, true); |
| 207 | } |
320 | } |
| 208 | while (val); |
321 | } |
| 209 | |
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| 210 | if (neg) |
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| 211 | *--p = neg; |
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| 212 | |
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| 213 | add ((void *) p, buf + sizeof (buf) - p); |
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| 214 | } |
322 | } |
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323 | |
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324 | dynbuf_text::operator char *() |
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325 | { |
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326 | *this << '\0'; |
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327 | linearise (); |
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328 | --ptr; |
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329 | return first->data; |
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330 | } |
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331 | |
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332 | void |
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333 | dynbuf_text::add_abilities (const char *name, uint32 abilities) |
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334 | { |
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335 | if (!abilities) |
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336 | return; |
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337 | |
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338 | *this << '(' << name; |
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339 | |
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340 | const char *sep = ": "; |
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341 | for_all_bits_sparse_32 (abilities, i) |
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342 | { |
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343 | *this << sep; sep = ", "; |
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344 | *this << attacks [i]; |
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345 | } |
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346 | |
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347 | *this << ')'; |
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348 | } |
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349 | |
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350 | void |
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351 | dynbuf_text::add_paths (const char *name, uint32 paths) |
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352 | { |
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353 | if (!paths) |
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354 | return; |
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355 | |
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356 | *this << '(' << name; |
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357 | |
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358 | const char *sep = ": "; |
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359 | for (int i = 0; i < NRSPELLPATHS; ++i) |
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360 | if (paths & (1 << i)) |
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361 | { |
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362 | *this << sep; sep = ", "; |
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363 | *this << spellpathnames [i]; |
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364 | } |
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365 | |
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366 | *this << ')'; |
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367 | } |
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368 | |
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369 | #if 0 |
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370 | struct dynbuf_test_class { |
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371 | dynbuf_test_class () |
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372 | { |
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373 | sint64 s = 0; |
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374 | for (int i = 0; i < 10000000; ++i) |
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375 | { |
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376 | char b1[256], b2[256]; |
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377 | |
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378 | dynbuf_text db; |
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379 | db.add (s); |
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380 | db.add (char (0)); |
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381 | |
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382 | db.linearise (b1); |
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383 | sprintf (b2, "%ld", s); |
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384 | |
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385 | if (strcmp (b1, b2)) |
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386 | printf ("<%s,%s>\n", b1, b2); |
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387 | |
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388 | if (i < 20) |
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|
389 | s = (sint64) pow (10., i); |
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390 | else |
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|
391 | s = (sint64) exp (random () * (43.6682723752766 / RAND_MAX)); |
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392 | } |
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393 | |
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394 | exit (0); |
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|
395 | } |
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|
396 | } dynbuf_test; |
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|
397 | #endif |
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398 | |
