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