| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: elite.c,v 1.1 2003/02/24 01:13:12 mdw Exp $ |
| 4 | * |
| 5 | * Elite planet data |
| 6 | * |
| 7 | * (c) 2003 Mark Wooding |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software Foundation, |
| 24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 25 | */ |
| 26 | |
| 27 | /*----- Revision history --------------------------------------------------* |
| 28 | * |
| 29 | * $Log: elite.c,v $ |
| 30 | * Revision 1.1 2003/02/24 01:13:12 mdw |
| 31 | * Initial import. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | /*----- Header files ------------------------------------------------------*/ |
| 36 | |
| 37 | #include <ctype.h> |
| 38 | #include <stdio.h> |
| 39 | #include <stdlib.h> |
| 40 | #include <string.h> |
| 41 | |
| 42 | #include <tcl.h> |
| 43 | |
| 44 | /*----- Data structures ---------------------------------------------------*/ |
| 45 | |
| 46 | typedef struct world { |
| 47 | unsigned char x[6]; |
| 48 | } world; |
| 49 | |
| 50 | typedef struct worldinfo { |
| 51 | unsigned x, y, gov, eco, tech, pop, prod, rad; |
| 52 | } worldinfo; |
| 53 | |
| 54 | /*----- The world type ----------------------------------------------------*/ |
| 55 | |
| 56 | static void world_fir(Tcl_Obj *o) |
| 57 | { |
| 58 | Tcl_Free(o->internalRep.otherValuePtr); |
| 59 | } |
| 60 | |
| 61 | static int xtoi(unsigned x) |
| 62 | { |
| 63 | if (x >= '0' && x <= '9') |
| 64 | return (x - '0'); |
| 65 | else if (x >= 'a' && x <= 'f') |
| 66 | return (x - 'a' + 10); |
| 67 | else if (x >= 'A' && x <= 'F') |
| 68 | return (x - 'A' + 10); |
| 69 | else |
| 70 | abort(); |
| 71 | } |
| 72 | |
| 73 | static Tcl_ObjType world_type; |
| 74 | |
| 75 | static int world_sfa(Tcl_Interp *ti, Tcl_Obj *o) |
| 76 | { |
| 77 | int l; |
| 78 | world ww, *w; |
| 79 | int i; |
| 80 | char *p = Tcl_GetStringFromObj(o, &l); |
| 81 | if (l != 12) |
| 82 | goto bad; |
| 83 | for (i = 0; i < 12; i += 2) { |
| 84 | if (!isxdigit((unsigned char)p[i]) || |
| 85 | !isxdigit((unsigned char)p[i + 1])) |
| 86 | goto bad; |
| 87 | ww.x[i >> 1] = (xtoi(p[i]) << 4) | (xtoi(p[i + 1])); |
| 88 | } |
| 89 | w = (world *)Tcl_Alloc(sizeof(*w)); |
| 90 | *w = ww; |
| 91 | o->internalRep.otherValuePtr = w; |
| 92 | o->typePtr = &world_type; |
| 93 | return (TCL_OK); |
| 94 | |
| 95 | bad: |
| 96 | if (ti) |
| 97 | Tcl_SetResult(ti, "bad world seed string", TCL_STATIC); |
| 98 | return (TCL_ERROR); |
| 99 | } |
| 100 | |
| 101 | static void world_us(Tcl_Obj *o) |
| 102 | { |
| 103 | char *p; |
| 104 | world *w = o->internalRep.otherValuePtr; |
| 105 | int i; |
| 106 | |
| 107 | p = Tcl_Alloc(13); |
| 108 | p[12] = 0; |
| 109 | o->bytes = p; |
| 110 | o->length = 12; |
| 111 | for (i = 0; i < 6; i++, p += 2) |
| 112 | sprintf(p, "%02x", w->x[i]); |
| 113 | } |
| 114 | |
| 115 | static void world_dir(Tcl_Obj *o, Tcl_Obj *oo) |
| 116 | { |
| 117 | world *w = (world *)Tcl_Alloc(sizeof(*w)); |
| 118 | memcpy(w, o->internalRep.otherValuePtr, sizeof(world)); |
| 119 | oo->internalRep.otherValuePtr = w; |
| 120 | oo->typePtr = &world_type; |
| 121 | Tcl_InvalidateStringRep(oo); |
| 122 | } |
| 123 | |
| 124 | static /*const*/ Tcl_ObjType world_type = { |
| 125 | "elite-world", world_fir, world_dir, world_us, world_sfa |
| 126 | }; |
| 127 | |
| 128 | static world *world_get(Tcl_Interp *ti, Tcl_Obj *o) |
| 129 | { |
| 130 | if (Tcl_ConvertToType(ti, o, &world_type) != TCL_OK) |
| 131 | return (0); |
| 132 | return (o->internalRep.otherValuePtr); |
| 133 | } |
| 134 | |
| 135 | static Tcl_Obj *world_new(const world *w) |
| 136 | { |
| 137 | world *ww; |
| 138 | Tcl_Obj *o = Tcl_NewObj(); |
| 139 | ww = (world *)Tcl_Alloc(sizeof(*ww)); |
| 140 | *ww = *w; |
| 141 | o->internalRep.otherValuePtr = ww; |
| 142 | o->typePtr = &world_type; |
| 143 | Tcl_InvalidateStringRep(o); |
| 144 | return (o); |
| 145 | } |
| 146 | |
| 147 | /*----- Elite-specific hacking --------------------------------------------* |
| 148 | * |
| 149 | * Taken from `Elite: The New Kind' by Christian Pinder. |
| 150 | */ |
| 151 | |
| 152 | static void waggle(world *w, world *ww) |
| 153 | { |
| 154 | unsigned int h, l; |
| 155 | |
| 156 | /* --- What goes on --- * |
| 157 | * |
| 158 | * 16-bit add of all three words, shift up, and insert the new value at the |
| 159 | * end. |
| 160 | */ |
| 161 | |
| 162 | l = w->x[0]; |
| 163 | h = w->x[1]; |
| 164 | l += w->x[2]; |
| 165 | h += w->x[3] + (l >= 0x100); |
| 166 | l &= 0xff; h &= 0xff; |
| 167 | l += w->x[4]; |
| 168 | h += w->x[5] + (l >= 0x100); |
| 169 | l &= 0xff; h &= 0xff; |
| 170 | ww->x[0] = w->x[2]; ww->x[1] = w->x[3]; |
| 171 | ww->x[2] = w->x[4]; ww->x[3] = w->x[5]; |
| 172 | ww->x[4] = l; ww->x[5] = h; |
| 173 | } |
| 174 | |
| 175 | /*----- Tcl commands ------------------------------------------------------*/ |
| 176 | |
| 177 | static int err(Tcl_Interp *ti, /*const*/ char *p) |
| 178 | { |
| 179 | Tcl_SetResult(ti, p, TCL_STATIC); |
| 180 | return (TCL_ERROR); |
| 181 | } |
| 182 | |
| 183 | /* --- elite-nextworld SEED --- */ |
| 184 | |
| 185 | static int cmd_nextworld(ClientData cd, Tcl_Interp *ti, |
| 186 | int objc, Tcl_Obj *const *objv) |
| 187 | { |
| 188 | world *w, ww; |
| 189 | if (objc != 2) |
| 190 | return (err(ti, "usage: elite-nextworld SEED")); |
| 191 | if ((w = world_get(ti, objv[1])) == 0) |
| 192 | return (TCL_ERROR); |
| 193 | waggle(w, &ww); |
| 194 | waggle(&ww, &ww); |
| 195 | waggle(&ww, &ww); |
| 196 | waggle(&ww, &ww); |
| 197 | Tcl_SetObjResult(ti, world_new(&ww)); |
| 198 | return (TCL_OK); |
| 199 | } |
| 200 | |
| 201 | /* --- elite-nextgalaxy SEED --- */ |
| 202 | |
| 203 | static int cmd_nextgalaxy(ClientData cd, Tcl_Interp *ti, |
| 204 | int objc, Tcl_Obj *const *objv) |
| 205 | { |
| 206 | world *w, ww; |
| 207 | int i; |
| 208 | |
| 209 | if (objc != 2) |
| 210 | return (err(ti, "usage: elite-nextgalaxy SEED")); |
| 211 | if ((w = world_get(ti, objv[1])) == 0) |
| 212 | return (TCL_ERROR); |
| 213 | for (i = 0; i < 6; i++) |
| 214 | ww.x[i] = ((w->x[i] << 1) | (w->x[i] >> 7)) & 0xff; |
| 215 | Tcl_SetObjResult(ti, world_new(&ww)); |
| 216 | return (TCL_OK); |
| 217 | } |
| 218 | |
| 219 | /* --- elite-worldinfo ARR SEED --- */ |
| 220 | |
| 221 | static void getworldinfo(worldinfo *wi, world *w) |
| 222 | { |
| 223 | wi->x = w->x[3]; |
| 224 | wi->y = w->x[1]; |
| 225 | wi->gov = (w->x[2] >> 3) & 0x07; |
| 226 | wi->eco = w->x[1] & 0x07; |
| 227 | if (wi->gov < 2) |
| 228 | wi->eco |= 0x02; |
| 229 | wi->tech = ((wi->eco ^ 7) + (w->x[3] & 0x03) + |
| 230 | (wi->gov >> 1) + (wi->gov & 0x01) + 1); |
| 231 | wi->pop = wi->tech * 4 + wi->gov + wi->eco - 3; |
| 232 | wi->prod = ((wi->eco ^ 7) + 3) * (wi->gov + 4) * wi->pop * 8; |
| 233 | wi->rad = (((w->x[5] & 0x0f) + 11) << 8) + w->x[3]; |
| 234 | } |
| 235 | |
| 236 | static const char digrams[] = |
| 237 | "abouseitiletstonlonuthnoallexegezacebisouses" |
| 238 | "armaindirea?eratenberalavetiedorquanteisrion"; |
| 239 | |
| 240 | static const char *const desc[][5] = { |
| 241 | /* 0 */ { "fabled", "notable", "well known", "famous", "noted" }, |
| 242 | /* 1 */ { "very ", "mildly ", "most ", "reasonably ", "" }, |
| 243 | /* 2 */ { "ancient", "<20>", "great", "vast", "pink" }, |
| 244 | /* 3 */ { "<29> <28> plantations", "mountains", "<27>", |
| 245 | "<19> forests", "oceans" }, |
| 246 | /* 4 */ { "shyness", "silliness", "mating traditions", |
| 247 | "loathing of <5>", "love for <5>" }, |
| 248 | /* 5 */ { "food blenders", "tourists", "poetry", "discos", "<13>" }, |
| 249 | /* 6 */ { "talking tree", "crab", "bat", "lobst", "%R" }, |
| 250 | /* 7 */ { "beset", "plagued", "ravaged", "cursed", "scourged" }, |
| 251 | /* 8 */ { "<21> civil war", "<26> <23> <24>s", |
| 252 | "a <26> disease", "<21> earthquakes", "<21> solar activity" }, |
| 253 | /* 9 */ { "its <2> <3>", "the %I <23> <24>", |
| 254 | "its inhabitants' <25> <4>", "<32>", "its <12> <13>" }, |
| 255 | /* 10 */ { "juice", "brandy", "water", "brew", "gargle blasters" }, |
| 256 | /* 11 */ { "%R", "%I <24>", "%I %R", "%I <26>", "<26> %R" }, |
| 257 | /* 12 */ { "fabulous", "exotic", "hoopy", "unusual", "exciting" }, |
| 258 | /* 13 */ { "cuisine", "night life", "casinos", "sit coms", " <32>" }, |
| 259 | /* 14 */ { "%H", "The planet %H", "The world %H", |
| 260 | "This planet", "This world" }, |
| 261 | /* 15 */ { "n unremarkable", " boring", " dull", " tedious", " revolting" }, |
| 262 | /* 16 */ { "planet", "world", "place", "little planet", "dump" }, |
| 263 | /* 17 */ { "wasp", "moth", "grub", "ant", "%R" }, |
| 264 | /* 18 */ { "poet", "arts graduate", "yak", "snail", "slug" }, |
| 265 | /* 19 */ { "tropical", "dense", "rain", "impenetrable", "exuberant" }, |
| 266 | /* 20 */ { "funny", "weird", "unusual", "strange", "peculiar" }, |
| 267 | /* 21 */ { "frequent", "occasional", "unpredictable", "dreadful", "deadly" }, |
| 268 | /* 22 */ { "<1><0> for <9>", "<1><0> for <9> and <9>", |
| 269 | "<7> by <8>", "<1><0> for <9> but <7> by <8>","a<15> <16>" }, |
| 270 | /* 23 */ { "<26>", "mountain", "edible", "tree", "spotted" }, |
| 271 | /* 24 */ { "<30>", "<31>", "<6>oid", "<18>", "<17>" }, |
| 272 | /* 25 */ { "ancient", "exceptional", "eccentric", "ingrained", "<20>" }, |
| 273 | /* 26 */ { "killer", "deadly", "evil", "lethal", "vicious" }, |
| 274 | /* 27 */ { "parking meters", "dust clouds", "ice bergs", |
| 275 | "rock formations", "volcanoes" }, |
| 276 | /* 28 */ { "plant", "tulip", "banana", "corn", "%Rweed" }, |
| 277 | /* 29 */ { "%R", "%I %R", "%I <26>", "inhabitant", "%I %R" }, |
| 278 | /* 30 */ { "shrew", "beast", "bison", "snake", "wolf" }, |
| 279 | /* 31 */ { "leopard", "cat", "monkey", "goat", "fish" }, |
| 280 | /* 32 */ { "<11> <10>", "%I <30> <33>", "its <12> <31> <33>", |
| 281 | "<34> <35>", "<11> <10>" }, |
| 282 | /* 33 */ { "meat", "cutlet", "steak", "burgers", "soup" }, |
| 283 | /* 34 */ { "ice", "mud", "Zero-G", "vacuum", "%I ultra" }, |
| 284 | /* 35 */ { "hockey", "cricket", "karate", "polo", "tennis" } |
| 285 | }; |
| 286 | |
| 287 | static int mangle(world *w) |
| 288 | { |
| 289 | unsigned a, x; |
| 290 | |
| 291 | x = (w->x[2] << 1) & 0xff; |
| 292 | a = x + w->x[4]; |
| 293 | if (w->x[2] & 0x80) |
| 294 | a++; |
| 295 | w->x[2] = a & 0xff; |
| 296 | w->x[4] = x; |
| 297 | a >>= 8; |
| 298 | x = w->x[3]; |
| 299 | a = (a + x + w->x[5]) & 0xff; |
| 300 | w->x[3] = a; |
| 301 | w->x[5] = x; |
| 302 | return (a); |
| 303 | } |
| 304 | |
| 305 | static void goatsoup(Tcl_Obj *d, const char *pn, world *w, const char *p) |
| 306 | { |
| 307 | for (;;) { |
| 308 | size_t sz = strcspn(p, "<%"); |
| 309 | unsigned n; |
| 310 | char buf[12]; |
| 311 | char *q; |
| 312 | |
| 313 | Tcl_AppendToObj(d, (char *)p, sz); |
| 314 | p += sz; |
| 315 | switch (*p) { |
| 316 | unsigned i, j; |
| 317 | case 0: |
| 318 | return; |
| 319 | case '<': |
| 320 | i = strtoul(p + 1, (char **)&p, 10); |
| 321 | p++; |
| 322 | j = mangle(w); |
| 323 | goatsoup(d, pn, w, desc[i][(j >= 0x33) + (j >= 0x66) + |
| 324 | (j >= 0x99) + (j >= 0xcc)]); |
| 325 | break; |
| 326 | case '%': |
| 327 | p++; |
| 328 | switch (*p++) { |
| 329 | case 'H': |
| 330 | Tcl_AppendToObj(d, (char *)pn, -1); |
| 331 | break; |
| 332 | case 'I': |
| 333 | sz = strlen(pn) - 1; |
| 334 | Tcl_AppendToObj(d, (char *)pn, |
| 335 | (pn[sz] == 'i' || pn[sz] == 'e') ? sz : sz + 1); |
| 336 | Tcl_AppendToObj(d, "ian", 3); |
| 337 | break; |
| 338 | case 'R': |
| 339 | n = (mangle(w) & 0x03) + 1; |
| 340 | q = buf; |
| 341 | while (n--) { |
| 342 | unsigned i = mangle(w) & 0x3e; |
| 343 | *q++ = digrams[i++]; |
| 344 | if (digrams[i] != '?') |
| 345 | *q++ = digrams[i++]; |
| 346 | } |
| 347 | *buf = toupper(*buf); |
| 348 | Tcl_AppendToObj(d, buf, q - buf); |
| 349 | break; |
| 350 | default: |
| 351 | abort(); |
| 352 | } |
| 353 | break; |
| 354 | default: |
| 355 | abort(); |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | static int cmd_worldinfo(ClientData cd, Tcl_Interp *ti, |
| 361 | int objc, Tcl_Obj *const *objv) |
| 362 | { |
| 363 | world *w; |
| 364 | worldinfo wi; |
| 365 | char *arr; |
| 366 | char buf[9]; |
| 367 | char *p; |
| 368 | unsigned j, n; |
| 369 | Tcl_Obj *o; |
| 370 | world ww; |
| 371 | |
| 372 | /* --- Check arguments --- */ |
| 373 | |
| 374 | if (objc != 3) |
| 375 | return (err(ti, "usage: elite-worldinfo ARR SEED")); |
| 376 | if ((w = world_get(ti, objv[2])) == 0) |
| 377 | return (TCL_ERROR); |
| 378 | arr = Tcl_GetString(objv[1]); |
| 379 | |
| 380 | /* --- Get the basic information --- */ |
| 381 | |
| 382 | getworldinfo(&wi, w); |
| 383 | if (!Tcl_SetVar2Ex(ti, arr, "x", Tcl_NewIntObj(wi.x * 4), |
| 384 | TCL_LEAVE_ERR_MSG) || |
| 385 | !Tcl_SetVar2Ex(ti, arr, "y", Tcl_NewIntObj(wi.y * 2), |
| 386 | TCL_LEAVE_ERR_MSG) || |
| 387 | !Tcl_SetVar2Ex(ti, arr, "government", Tcl_NewIntObj(wi.gov), |
| 388 | TCL_LEAVE_ERR_MSG) || |
| 389 | !Tcl_SetVar2Ex(ti, arr, "economy", Tcl_NewIntObj(wi.eco), |
| 390 | TCL_LEAVE_ERR_MSG) || |
| 391 | !Tcl_SetVar2Ex(ti, arr, "techlevel", Tcl_NewIntObj(wi.tech), |
| 392 | TCL_LEAVE_ERR_MSG) || |
| 393 | !Tcl_SetVar2Ex(ti, arr, "population", Tcl_NewIntObj(wi.pop), |
| 394 | TCL_LEAVE_ERR_MSG) || |
| 395 | !Tcl_SetVar2Ex(ti, arr, "productivity", Tcl_NewIntObj(wi.prod), |
| 396 | TCL_LEAVE_ERR_MSG) || |
| 397 | !Tcl_SetVar2Ex(ti, arr, "radius", Tcl_NewIntObj(wi.rad), |
| 398 | TCL_LEAVE_ERR_MSG) || |
| 399 | !Tcl_SetVar2Ex(ti, arr, "seed", objv[2], |
| 400 | TCL_LEAVE_ERR_MSG)) |
| 401 | return (TCL_ERROR); |
| 402 | |
| 403 | /* --- Work out the inhabitants --- */ |
| 404 | |
| 405 | if (!(w->x[4] & 0x80)) { |
| 406 | if (!Tcl_SetVar2(ti, arr, "inhabitants", "humans", TCL_LEAVE_ERR_MSG)) |
| 407 | return (TCL_ERROR); |
| 408 | } else { |
| 409 | static const char *const id_a[] = { "large", "fierce", "small" }; |
| 410 | static const char *const id_b[] = { "green", "red", "yellow", "blue", |
| 411 | "black", "harmless" }; |
| 412 | static const char *const id_c[] = { "slimy", "bug-eyed", "horned", |
| 413 | "bony", "fat", "furry" }; |
| 414 | static const char *const id_d[] = { "rodents", "frogs", "lizards", |
| 415 | "lobsters", "birds", "humanoids", |
| 416 | "felines", "insects" }; |
| 417 | |
| 418 | o = Tcl_NewListObj(0, 0); |
| 419 | j = (w->x[5] >> 2) & 0x07; |
| 420 | if (j < 3) |
| 421 | Tcl_ListObjAppendElement(ti, o, Tcl_NewStringObj(id_a[j], -1)); |
| 422 | j = (w->x[5] >> 5) & 0x07; |
| 423 | if (j < 6) |
| 424 | Tcl_ListObjAppendElement(ti, o, Tcl_NewStringObj(id_b[j], -1)); |
| 425 | j = (w->x[1] ^ w->x[3]) & 0x07; |
| 426 | if (j < 6) |
| 427 | Tcl_ListObjAppendElement(ti, o, Tcl_NewStringObj(id_c[j], -1)); |
| 428 | j += w->x[5] & 0x03; |
| 429 | Tcl_ListObjAppendElement(ti, o, Tcl_NewStringObj(id_d[j & 0x07], -1)); |
| 430 | if (!Tcl_SetVar2Ex(ti, arr, "inhabitants", o, TCL_LEAVE_ERR_MSG)) |
| 431 | return (TCL_ERROR); |
| 432 | } |
| 433 | |
| 434 | /* --- Work out the planet name --- */ |
| 435 | |
| 436 | n = (w->x[0] & 0x40) ? 4 : 3; |
| 437 | p = buf; |
| 438 | ww = *w; |
| 439 | while (n--) { |
| 440 | j = ww.x[5] & 0x1f; |
| 441 | if (j) { |
| 442 | j = (j + 12) << 1; |
| 443 | *p++ = digrams[j++]; |
| 444 | if (digrams[j] != '?') |
| 445 | *p++ = digrams[j]; |
| 446 | } |
| 447 | waggle(&ww, &ww); |
| 448 | } |
| 449 | *p++ = 0; |
| 450 | *buf = toupper(*buf); |
| 451 | if (!Tcl_SetVar2Ex(ti, arr, "name", Tcl_NewStringObj(buf, -1), |
| 452 | TCL_LEAVE_ERR_MSG)) |
| 453 | return (TCL_ERROR); |
| 454 | |
| 455 | /* --- Finally work out the goat-soup description --- */ |
| 456 | |
| 457 | ww = *w; |
| 458 | o = Tcl_NewStringObj(0, 0); |
| 459 | goatsoup(o, buf, &ww, "<14> is <22>."); |
| 460 | if (!Tcl_SetVar2Ex(ti, arr, "description", o, TCL_LEAVE_ERR_MSG)) |
| 461 | return (TCL_ERROR); |
| 462 | return (TCL_OK); |
| 463 | } |
| 464 | |
| 465 | /* --- elite-market ARR SEED [FLUC] --- */ |
| 466 | |
| 467 | static const struct item { |
| 468 | /*const*/ char *name; |
| 469 | unsigned base; |
| 470 | int var; |
| 471 | unsigned qty; |
| 472 | unsigned mask; |
| 473 | } items[] = { |
| 474 | { "food", 19, -2, 6, 0x01 }, |
| 475 | { "textiles", 20, -1, 10, 0x03 }, |
| 476 | { "radioactives", 65, -3, 2, 0x07 }, |
| 477 | { "slaves", 40, -5, 226, 0x1f }, |
| 478 | { "liquor-wines", 83, -5, 251, 0x0f }, |
| 479 | { "luxuries", 196, 8, 54, 0x03 }, |
| 480 | { "narcotics", 235, 29, 8, 0x78 }, |
| 481 | { "computers", 154, 14, 56, 0x03 }, |
| 482 | { "machinery", 117, 6, 40, 0x07 }, |
| 483 | { "alloys", 78, 1, 17, 0x1f }, |
| 484 | { "firearms", 124, 13, 29, 0x07 }, |
| 485 | { "furs", 176, -9, 220, 0x3f }, |
| 486 | { "minerals", 32, -1, 53, 0x03 }, |
| 487 | { "gold", 97, -1, 66, 0x07 }, |
| 488 | { "platinum", 171, -2, 55, 0x1f }, |
| 489 | { "gem-stones", 45, -1, 250, 0x0f }, |
| 490 | { "alien-items", 53, 15, 192, 0x07 }, |
| 491 | { 0, 0, 0, 0, 0x00 } |
| 492 | }; |
| 493 | |
| 494 | static int cmd_market(ClientData cd, Tcl_Interp *ti, |
| 495 | int objc, Tcl_Obj *const *objv) |
| 496 | { |
| 497 | int fluc = 0; |
| 498 | world *w; |
| 499 | worldinfo wi; |
| 500 | const struct item *i; |
| 501 | char *arr; |
| 502 | |
| 503 | if (objc < 3 || objc > 5) |
| 504 | return (err(ti, "usage: elite-market ARR SEED [FLUC]")); |
| 505 | if ((w = world_get(ti, objv[2])) == 0) |
| 506 | return (TCL_ERROR); |
| 507 | arr = Tcl_GetString(objv[1]); |
| 508 | if (objc >= 4 && Tcl_GetIntFromObj(ti, objv[3], &fluc) != TCL_OK) |
| 509 | return (TCL_ERROR); |
| 510 | getworldinfo(&wi, w); |
| 511 | |
| 512 | for (i = items; i->name; i++) { |
| 513 | unsigned pr, qt; |
| 514 | Tcl_Obj *oo[2]; |
| 515 | pr = (i->base + (fluc & i->mask) + (wi.eco * i->var)) & 0xff; |
| 516 | qt = (i->qty + (fluc & i->mask) - (wi.eco * i->var)) & 0xff; |
| 517 | if (qt & 0x80) |
| 518 | qt = 0; |
| 519 | oo[0] = Tcl_NewIntObj(pr << 2); |
| 520 | oo[1] = Tcl_NewIntObj(qt & 0x3f); |
| 521 | if (!Tcl_SetVar2Ex(ti, arr, i->name, Tcl_NewListObj(2, oo), |
| 522 | TCL_LEAVE_ERR_MSG)) |
| 523 | return (TCL_ERROR); |
| 524 | } |
| 525 | return (TCL_OK); |
| 526 | } |
| 527 | |
| 528 | /*----- Commander file decomposition --------------------------------------*/ |
| 529 | |
| 530 | static unsigned cksum(const unsigned char *p, size_t sz) |
| 531 | { |
| 532 | unsigned a = 0x49, c = 0; |
| 533 | |
| 534 | p += sz - 1; |
| 535 | while (--sz) { |
| 536 | a += *--p + c; |
| 537 | c = a >> 8; |
| 538 | a &= 0xff; |
| 539 | a ^= p[1]; |
| 540 | } |
| 541 | fflush(stdout); |
| 542 | return (a); |
| 543 | } |
| 544 | |
| 545 | /* --- The big translation table --- */ |
| 546 | |
| 547 | struct cmddata { |
| 548 | /*const*/ char *name; |
| 549 | unsigned off; |
| 550 | int (*get)(Tcl_Interp *, /*const*/ char *, |
| 551 | const unsigned char *, const struct cmddata *); |
| 552 | int (*put)(Tcl_Interp *, /*const*/ char *, |
| 553 | unsigned char *, const struct cmddata *); |
| 554 | int x; |
| 555 | }; |
| 556 | |
| 557 | static int get_byte(Tcl_Interp *ti, /*const*/ char *arr, |
| 558 | const unsigned char *p, const struct cmddata *cd) |
| 559 | { |
| 560 | return (!Tcl_SetVar2Ex(ti, arr, cd->name, |
| 561 | Tcl_NewIntObj(*p - cd->x), TCL_LEAVE_ERR_MSG)); |
| 562 | } |
| 563 | |
| 564 | static int get_seed(Tcl_Interp *ti, /*const*/ char *arr, |
| 565 | const unsigned char *p, const struct cmddata *cd) |
| 566 | { |
| 567 | world w; |
| 568 | |
| 569 | memcpy(w.x, p, 6); |
| 570 | return (!Tcl_SetVar2Ex(ti, arr, cd->name, |
| 571 | world_new(&w), TCL_LEAVE_ERR_MSG)); |
| 572 | } |
| 573 | |
| 574 | static int get_word(Tcl_Interp *ti, /*const*/ char *arr, |
| 575 | const unsigned char *p, const struct cmddata *cd) |
| 576 | { |
| 577 | return (!Tcl_SetVar2Ex(ti, arr, cd->name, |
| 578 | Tcl_NewLongObj((p[0] & 0xff) << 24 | |
| 579 | (p[1] & 0xff) << 16 | |
| 580 | (p[2] & 0xff) << 8 | |
| 581 | (p[3] & 0xff) << 0), |
| 582 | TCL_LEAVE_ERR_MSG)); |
| 583 | } |
| 584 | |
| 585 | static int get_hword(Tcl_Interp *ti, /*const*/ char *arr, |
| 586 | const unsigned char *p, const struct cmddata *cd) |
| 587 | { |
| 588 | return (!Tcl_SetVar2Ex(ti, arr, cd->name, |
| 589 | Tcl_NewLongObj((p[0] & 0xff) << 0 | |
| 590 | (p[1] & 0xff) << 8), |
| 591 | TCL_LEAVE_ERR_MSG)); |
| 592 | } |
| 593 | |
| 594 | static int get_bool(Tcl_Interp *ti, /*const*/ char *arr, |
| 595 | const unsigned char *p, const struct cmddata *cd) |
| 596 | { |
| 597 | return (!Tcl_SetVar2Ex(ti, arr, cd->name, |
| 598 | Tcl_NewBooleanObj(*p), TCL_LEAVE_ERR_MSG)); |
| 599 | } |
| 600 | |
| 601 | static int get_items(Tcl_Interp *ti, /*const*/ char *arr, |
| 602 | const unsigned char *p, const struct cmddata *cd) |
| 603 | { |
| 604 | char buf[32]; |
| 605 | const struct item *i; |
| 606 | |
| 607 | for (i = items; i->name; i++) { |
| 608 | sprintf(buf, "%s-%s", cd->name, i->name); |
| 609 | if (!Tcl_SetVar2Ex(ti, arr, buf, |
| 610 | Tcl_NewIntObj(*p++), TCL_LEAVE_ERR_MSG)) |
| 611 | return (-1); |
| 612 | } |
| 613 | return (0); |
| 614 | } |
| 615 | |
| 616 | static int put_byte(Tcl_Interp *ti, /*const*/ char *arr, |
| 617 | unsigned char *p, const struct cmddata *cd) |
| 618 | { |
| 619 | Tcl_Obj *o; |
| 620 | int i; |
| 621 | |
| 622 | if ((o = Tcl_GetVar2Ex(ti, arr, cd->name, TCL_LEAVE_ERR_MSG)) == 0 || |
| 623 | Tcl_GetIntFromObj(ti, o, &i) != TCL_OK) |
| 624 | return (-1); |
| 625 | *p = i + cd->x; |
| 626 | return (0); |
| 627 | } |
| 628 | |
| 629 | static int put_word(Tcl_Interp *ti, /*const*/ char *arr, |
| 630 | unsigned char *p, const struct cmddata *cd) |
| 631 | { |
| 632 | Tcl_Obj *o; |
| 633 | long l; |
| 634 | |
| 635 | if ((o = Tcl_GetVar2Ex(ti, arr, cd->name, TCL_LEAVE_ERR_MSG)) == 0 || |
| 636 | Tcl_GetLongFromObj(ti, o, &l) != TCL_OK) |
| 637 | return (-1); |
| 638 | p[0] = (l >> 24) & 0xff; |
| 639 | p[1] = (l >> 16) & 0xff; |
| 640 | p[2] = (l >> 8) & 0xff; |
| 641 | p[3] = (l >> 0) & 0xff; |
| 642 | return (0); |
| 643 | } |
| 644 | |
| 645 | static int put_hword(Tcl_Interp *ti, /*const*/ char *arr, |
| 646 | unsigned char *p, const struct cmddata *cd) |
| 647 | { |
| 648 | Tcl_Obj *o; |
| 649 | long l; |
| 650 | |
| 651 | if ((o = Tcl_GetVar2Ex(ti, arr, cd->name, TCL_LEAVE_ERR_MSG)) == 0 || |
| 652 | Tcl_GetLongFromObj(ti, o, &l) != TCL_OK) |
| 653 | return (-1); |
| 654 | p[0] = (l >> 0) & 0xff; |
| 655 | p[1] = (l >> 8) & 0xff; |
| 656 | return (0); |
| 657 | } |
| 658 | |
| 659 | static int put_const(Tcl_Interp *ti, /*const*/ char *arr, |
| 660 | unsigned char *p, const struct cmddata *cd) |
| 661 | { |
| 662 | *p = cd->x; |
| 663 | return (0); |
| 664 | } |
| 665 | |
| 666 | static int put_seed(Tcl_Interp *ti, /*const*/ char *arr, |
| 667 | unsigned char *p, const struct cmddata *cd) |
| 668 | { |
| 669 | Tcl_Obj *o; |
| 670 | world *w; |
| 671 | |
| 672 | if ((o = Tcl_GetVar2Ex(ti, arr, cd->name, TCL_LEAVE_ERR_MSG)) == 0 || |
| 673 | (w = world_get(ti, o)) == 0) |
| 674 | return (-1); |
| 675 | memcpy(p, w->x, 6); |
| 676 | return (0); |
| 677 | } |
| 678 | |
| 679 | static int put_bool(Tcl_Interp *ti, /*const*/ char *arr, |
| 680 | unsigned char *p, const struct cmddata *cd) |
| 681 | { |
| 682 | Tcl_Obj *o; |
| 683 | int b; |
| 684 | |
| 685 | if ((o = Tcl_GetVar2Ex(ti, arr, cd->name, TCL_LEAVE_ERR_MSG)) == 0 || |
| 686 | Tcl_GetBooleanFromObj(ti, o, &b) != TCL_OK) |
| 687 | return (-1); |
| 688 | *p = b ? cd->x : 0; |
| 689 | return (0); |
| 690 | } |
| 691 | |
| 692 | static int put_items(Tcl_Interp *ti, /*const*/ char *arr, |
| 693 | unsigned char *p, const struct cmddata *cd) |
| 694 | { |
| 695 | char buf[32]; |
| 696 | int ii; |
| 697 | Tcl_Obj *o; |
| 698 | const struct item *i; |
| 699 | |
| 700 | for (i = items; i->name; i++) { |
| 701 | sprintf(buf, "%s-%s", cd->name, i->name); |
| 702 | if ((o = Tcl_GetVar2Ex(ti, arr, buf, TCL_LEAVE_ERR_MSG)) == 0 || |
| 703 | Tcl_GetIntFromObj(ti, o, &ii) != TCL_OK) |
| 704 | return (-1); |
| 705 | *p++ = ii; |
| 706 | } |
| 707 | return (0); |
| 708 | } |
| 709 | |
| 710 | static struct cmddata cmdtab[] = { |
| 711 | { "mission", 0, get_byte, put_byte, 0 }, |
| 712 | { "world-x", 1, get_byte, put_byte, 0 }, |
| 713 | { "world-y", 2, get_byte, put_byte, 0 }, |
| 714 | { "gal-seed", 3, get_seed, put_seed, 0 }, |
| 715 | { "credits", 9, get_word, put_word, 0 }, |
| 716 | { "fuel", 13, get_byte, put_byte, 0 }, |
| 717 | { "", 14, 0, put_const, 4 }, |
| 718 | { "gal-number", 15, get_byte, put_byte, -1 }, |
| 719 | { "front-laser", 16, get_byte, put_byte, 0 }, |
| 720 | { "rear-laser", 17, get_byte, put_byte, 0 }, |
| 721 | { "left-laser", 18, get_byte, put_byte, 0 }, |
| 722 | { "right-laser", 19, get_byte, put_byte, 0 }, |
| 723 | { "cargo", 22, get_byte, put_byte, 2 }, |
| 724 | { "hold", 23, get_items, put_items, 0 }, |
| 725 | { "ecm", 40, get_bool, put_bool, 255 }, |
| 726 | { "fuel-scoop", 41, get_bool, put_bool, 255 }, |
| 727 | { "energy-bomb", 42, get_bool, put_bool, 127 }, |
| 728 | { "energy-unit", 43, get_byte, put_byte, 0 }, |
| 729 | { "docking-computer", 44, get_bool, put_bool, 255 }, |
| 730 | { "gal-hyperdrive", 45, get_bool, put_bool, 255 }, |
| 731 | { "escape-pod", 46, get_bool, put_bool, 255 }, |
| 732 | { "missiles", 51, get_byte, put_byte, 0 }, |
| 733 | { "legal-status", 52, get_byte, put_byte, 0 }, |
| 734 | { "station", 53, get_items, put_items, 0 }, |
| 735 | { "market-fluc", 70, get_byte, put_byte, 0 }, |
| 736 | { "score", 71, get_hword, put_hword, 0 }, |
| 737 | { "", 74, 0, put_const, 32 }, |
| 738 | { 0, 0, 0, 0, 0 } |
| 739 | }; |
| 740 | |
| 741 | /* --- elite-unpackcmdr [-force] ARR DATA --- */ |
| 742 | |
| 743 | static int cmd_unpackcmdr(ClientData cd, Tcl_Interp *ti, |
| 744 | int objc, Tcl_Obj *const *objv) |
| 745 | { |
| 746 | char *arr; |
| 747 | unsigned char *p, *q; |
| 748 | int sz; |
| 749 | unsigned f = 0; |
| 750 | unsigned ck; |
| 751 | const struct cmddata *c; |
| 752 | |
| 753 | #define f_force 1u |
| 754 | |
| 755 | /* --- Read the arguments --- */ |
| 756 | |
| 757 | objc--; objv++; |
| 758 | while (objc) { |
| 759 | char *opt = Tcl_GetString(*objv); |
| 760 | if (strcmp(opt, "-force") == 0) |
| 761 | f |= f_force; |
| 762 | else if (strcmp(opt, "--") == 0) { |
| 763 | objc--; |
| 764 | objv++; |
| 765 | break; |
| 766 | } else |
| 767 | break; |
| 768 | objc--; |
| 769 | objv++; |
| 770 | } |
| 771 | if (objc != 2) |
| 772 | return (err(ti, "usage: elite-unpackcmdr [-force] ARR DATA")); |
| 773 | arr = Tcl_GetString(objv[0]); |
| 774 | p = Tcl_GetByteArrayFromObj(objv[1], &sz); |
| 775 | |
| 776 | /* --- Check the data for correctness --- */ |
| 777 | |
| 778 | if (sz < 74) |
| 779 | return (err(ti, "bad commander data (bad length)")); |
| 780 | ck = cksum(p, 74); |
| 781 | if (!(f & f_force)) { |
| 782 | if (sz < 76 || p[74] != (ck ^ 0xa9) || p[75] != ck) |
| 783 | return (err(ti, "bad commander data (bad checksum)")); |
| 784 | for (q = p + 77; q < p + sz; q++) |
| 785 | if (*q) |
| 786 | return (err(ti, "bad commander data (bad data at end)")); |
| 787 | } |
| 788 | |
| 789 | /* --- Deconstruct the data --- */ |
| 790 | |
| 791 | for (c = cmdtab; c->name; c++) { |
| 792 | if (c->get && c->get(ti, arr, p + c->off, c)) |
| 793 | return (TCL_ERROR); |
| 794 | } |
| 795 | return (0); |
| 796 | } |
| 797 | |
| 798 | /* --- elite-packcmdr ARR --- */ |
| 799 | |
| 800 | static int cmd_packcmdr(ClientData cd, Tcl_Interp *ti, |
| 801 | int objc, Tcl_Obj *const *objv) |
| 802 | { |
| 803 | char *arr; |
| 804 | unsigned char p[256]; |
| 805 | unsigned ck; |
| 806 | const struct cmddata *c; |
| 807 | |
| 808 | if (objc != 2) |
| 809 | return (err(ti, "usage: elite-packcmdr ARR")); |
| 810 | arr = Tcl_GetString(objv[1]); |
| 811 | |
| 812 | memset(p, 0, sizeof(p)); |
| 813 | for (c = cmdtab; c->name; c++) { |
| 814 | if (c->put && c->put(ti, arr, p + c->off, c)) |
| 815 | return (TCL_ERROR); |
| 816 | } |
| 817 | |
| 818 | ck = cksum(p, 74); |
| 819 | p[74] = ck ^ 0xa9; |
| 820 | p[75] = ck; |
| 821 | Tcl_SetObjResult(ti, Tcl_NewByteArrayObj(p, sizeof(p))); |
| 822 | return (0); |
| 823 | } |
| 824 | |
| 825 | /*----- Initialization ----------------------------------------------------*/ |
| 826 | |
| 827 | int Elite_SafeInit(Tcl_Interp *ti) |
| 828 | { |
| 829 | static const struct cmd { |
| 830 | /*const*/ char *name; |
| 831 | Tcl_ObjCmdProc *proc; |
| 832 | } cmds[] = { |
| 833 | { "elite-nextworld", cmd_nextworld }, |
| 834 | { "elite-nextgalaxy", cmd_nextgalaxy }, |
| 835 | { "elite-worldinfo", cmd_worldinfo }, |
| 836 | { "elite-market", cmd_market }, |
| 837 | { "elite-unpackcmdr", cmd_unpackcmdr }, |
| 838 | { "elite-packcmdr", cmd_packcmdr }, |
| 839 | { 0, 0 } |
| 840 | }; |
| 841 | |
| 842 | const struct cmd *c; |
| 843 | for (c = cmds; c->name; c++) |
| 844 | Tcl_CreateObjCommand(ti, c->name, c->proc, 0, 0); |
| 845 | Tcl_RegisterObjType(&world_type); |
| 846 | if (Tcl_PkgProvide(ti, "elite-bits", "1.0.0")) |
| 847 | return (TCL_ERROR); |
| 848 | return (TCL_OK); |
| 849 | } |
| 850 | |
| 851 | int Elite_Init(Tcl_Interp *ti) |
| 852 | { |
| 853 | return (Elite_SafeInit(ti)); |
| 854 | } |
| 855 | |
| 856 | /*----- That's all, folks -------------------------------------------------*/ |