1 | /* |
1 | /* |
2 | * CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game |
3 | * |
3 | * |
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
5 | * Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
5 | * Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
6 | * Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (C) 1992 Frank Tore Johansen |
7 | * |
7 | * |
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63 | |
63 | |
64 | return state [0] ^ state [1] ^ state [2] ^ state [3]; |
64 | return state [0] ^ state [1] ^ state [2] ^ state [3]; |
65 | } |
65 | } |
66 | |
66 | |
67 | uint32_t |
67 | uint32_t |
68 | tausworthe_random_generator::get_range (uint32_t r_max) |
68 | tausworthe_random_generator::get_range (uint32_t num) |
69 | { |
69 | { |
70 | return (next () * (uint64_t)r_max) >> 32U; |
70 | return (next () * (uint64_t)num) >> 32U; |
71 | } |
71 | } |
72 | |
72 | |
73 | // return a number within (min .. max) |
73 | // return a number within (min .. max) |
74 | int |
74 | int |
75 | tausworthe_random_generator::get_range (int r_min, int r_max) |
75 | tausworthe_random_generator::get_range (int r_min, int r_max) |
76 | { |
76 | { |
77 | return r_min + get_range (max (r_max - r_min + 1, 1)); |
77 | return r_min + get_range (max (r_max - r_min + 1, 0)); |
78 | } |
78 | } |
79 | |
79 | |
80 | /* |
80 | /* |
81 | * The random functions here take luck into account when rolling random |
81 | * The random functions here take luck into account when rolling random |
82 | * dice or numbers. This function has less of an impact the larger the |
82 | * dice or numbers. This function has less of an impact the larger the |
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95 | int |
95 | int |
96 | random_roll (int r_min, int r_max, const object *op, int goodbad) |
96 | random_roll (int r_min, int r_max, const object *op, int goodbad) |
97 | { |
97 | { |
98 | int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */ |
98 | int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */ |
99 | |
99 | |
100 | if (r_max < 1 || r_max < r_min) |
100 | if (r_max < r_min) |
101 | { |
101 | { |
102 | LOG (llevError, "Calling random_roll with min=%d max=%d\n", r_min, r_max); |
102 | LOG (llevError | logBacktrace, "Calling random_roll with min=%d max=%d\n", r_min, r_max); |
103 | return r_min; |
103 | return r_min; |
104 | } |
104 | } |
105 | |
105 | |
106 | if (op->type == PLAYER) |
106 | if (op->type == PLAYER) |
107 | { |
107 | { |
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121 | * for exp loss calculations for players changing religions. |
121 | * for exp loss calculations for players changing religions. |
122 | */ |
122 | */ |
123 | sint64 |
123 | sint64 |
124 | random_roll64 (sint64 min, sint64 max, const object *op, int goodbad) |
124 | random_roll64 (sint64 min, sint64 max, const object *op, int goodbad) |
125 | { |
125 | { |
126 | sint64 omin, diff, luck, ran; |
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127 | int base; |
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128 | |
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129 | omin = min; |
126 | sint64 omin = min; |
130 | diff = max - min + 1; |
127 | sint64 diff = max - min + 1; |
131 | ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
128 | int base = diff > 2 ? 20 : 50; /* d2 and d3 are corner cases */ |
132 | |
129 | |
133 | if (max < 1 || diff < 1) |
130 | if (diff < 0) |
134 | { |
131 | { |
135 | LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max); |
132 | LOG (llevError | logBacktrace, "Calling random_roll64 with min=%" PRId64 " max=%" PRId64 "\n", min, max); |
136 | return (min); /* avoids a float exception */ |
133 | return (min); /* avoids a float exception */ |
137 | } |
134 | } |
138 | |
135 | |
139 | /* |
136 | /* |
140 | * Make a call to get two 32 bit unsigned random numbers, and just to |
137 | * Make a call to get two 32 bit unsigned random numbers, and just to |
141 | * a little bitshifting. |
138 | * a little bitshifting. |
142 | */ |
139 | */ |
143 | ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31); |
140 | sint64 ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31); |
144 | |
141 | |
145 | if (op->type != PLAYER) |
142 | if (op->type != PLAYER) |
146 | return ((ran % diff) + min); |
143 | return ((ran % diff) + min); |
147 | |
144 | |
148 | luck = op->stats.luck; |
145 | int luck = op->stats.luck; |
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146 | |
149 | if (rndm (base) < MIN (10, abs (luck))) |
147 | if (rndm (base) < MIN (10, abs (luck))) |
150 | { |
148 | { |
151 | /* we have a winner */ |
149 | /* we have a winner */ |
152 | ((luck > 0) ? (luck = 1) : (luck = -1)); |
150 | ((luck > 0) ? (luck = 1) : (luck = -1)); |
153 | diff -= luck; |
151 | diff -= luck; |
154 | if (diff < 1) |
152 | if (diff < 1) |
155 | return (omin); /*check again */ |
153 | return (omin); /*check again */ |
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154 | |
156 | ((goodbad) ? (min += luck) : (diff)); |
155 | ((goodbad) ? (min += luck) : (diff)); |
157 | |
156 | |
158 | return (MAX (omin, MIN (max, (ran % diff) + min))); |
157 | return (MAX (omin, MIN (max, (ran % diff) + min))); |
159 | } |
158 | } |
160 | |
159 | |
161 | return ((ran % diff) + min); |
160 | return ran % diff + min; |
162 | } |
161 | } |
163 | |
162 | |
164 | /* |
163 | /* |
165 | * Roll a number of dice (2d3, 4d6). Uses op to determine luck, |
164 | * Roll a number of dice (2d3, 4d6). Uses op to determine luck, |
166 | * If goodbad is non-zero, luck increases the roll, if zero, it decreases. |
165 | * If goodbad is non-zero, luck increases the roll, if zero, it decreases. |
167 | * Generally, op should be the player/caster/hitter requesting the roll, |
166 | * Generally, op should be the player/caster/hitter requesting the roll, |
168 | * not the recipient (ie, the poor slob getting hit). |
167 | * not the recipient (ie, the poor slob getting hit). |
169 | * The args are num D size (ie 4d6) [garbled 20010916] |
168 | * The args are num D size (ie 4d6) [garbled 20010916] |
170 | */ |
169 | */ |
171 | |
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172 | int |
170 | int |
173 | die_roll (int num, int size, const object *op, int goodbad) |
171 | die_roll (int num, int size, const object *op, int goodbad) |
174 | { |
172 | { |
175 | int min, diff, luck, total, i, gotlucky, base; |
173 | int min, luck, total, i, gotlucky; |
176 | |
174 | |
177 | diff = size; |
175 | int diff = size; |
178 | min = 1; |
176 | min = 1; |
179 | luck = total = gotlucky = 0; |
177 | luck = total = gotlucky = 0; |
180 | ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
178 | int base = diff > 2 ? 20 : 50; /* d2 and d3 are corner cases */ |
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179 | |
181 | if (size < 2 || diff < 1) |
180 | if (size < 2 || diff < 1) |
182 | { |
181 | { |
183 | LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size); |
182 | LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size); |
184 | return (num); /* avoids a float exception */ |
183 | return num; /* avoids a float exception */ |
185 | } |
184 | } |
186 | |
185 | |
187 | if (op->type == PLAYER) |
186 | if (op->type == PLAYER) |
188 | luck = op->stats.luck; |
187 | luck = op->stats.luck; |
189 | |
188 | |
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553 | fork_abort (const char *msg) |
552 | fork_abort (const char *msg) |
554 | { |
553 | { |
555 | if (!fork ()) |
554 | if (!fork ()) |
556 | { |
555 | { |
557 | signal (SIGABRT, SIG_DFL); |
556 | signal (SIGABRT, SIG_DFL); |
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557 | // try to put corefiles into a subdirectory, if existing, to allow |
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558 | // an administrator to reduce the I/O load. |
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559 | chdir ("cores"); |
558 | abort (); |
560 | abort (); |
559 | } |
561 | } |
560 | |
562 | |
561 | LOG (llevError, "fork abort: %s\n", msg); |
563 | LOG (llevError, "fork abort: %s\n", msg); |
562 | } |
564 | } |
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607 | memcpy (dst + maxlen - 4, "...", 4); |
609 | memcpy (dst + maxlen - 4, "...", 4); |
608 | } |
610 | } |
609 | } |
611 | } |
610 | else |
612 | else |
611 | memcpy (dst, src, len + 1); |
613 | memcpy (dst, src, len + 1); |
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614 | } |
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615 | |
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616 | const std::string |
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617 | format (const char *format, ...) |
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618 | { |
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619 | int len; |
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620 | |
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621 | { |
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622 | char buf[128]; |
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623 | |
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624 | va_list ap; |
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625 | va_start (ap, format); |
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626 | len = vsnprintf (buf, sizeof (buf), format, ap); |
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627 | va_end (ap); |
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628 | |
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629 | assert (len >= 0); // shield againstz broken vsnprintf's |
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630 | |
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631 | // was our static buffer short enough? |
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632 | if (len < sizeof (buf)) |
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633 | return std::string (buf, len); |
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634 | } |
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635 | |
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636 | { |
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637 | // longer, try harder |
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638 | char *buf = salloc<char> (len + 1); |
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639 | |
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640 | va_list ap; |
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641 | va_start (ap, format); |
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642 | vsnprintf (buf, len + 1, format, ap); |
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643 | va_end (ap); |
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644 | |
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645 | const std::string s (buf, len); |
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646 | sfree<char> (buf, len + 1); |
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647 | |
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648 | return buf; |
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649 | } |
612 | } |
650 | } |
613 | |
651 | |
614 | tstamp now () |
652 | tstamp now () |
615 | { |
653 | { |
616 | struct timeval tv; |
654 | struct timeval tv; |