Difference between revisions of "Source:NetHack 2.3e/rnd.c"
Jump to navigation
Jump to search
m (Automated source code upload) |
Kernigh bot (talk | contribs) m (NetHack 2.3e/rnd.c moved to Source:NetHack 2.3e/rnd.c: Robot: moved page) |
(No difference)
|
Latest revision as of 03:52, 4 March 2008
Below is the full text to rnd.c from the source code of NetHack 2.3e. To link to a particular line, write [[NetHack 2.3e/rnd.c#line123]], for example.
Warning! This is the source code from an old release. For the latest release, see Source code
Screenshots and source code from Hack are used under the CWI license.
1. /* SCCS Id: @(#)rnd.c 2.3 87/12/12 2. */ 3. #include "config.h" 4. /* rand() is either random() or lrand48() - see config.h. */ 5. #ifdef UNIX 6. #define RND(x) (rand() % (x)) 7. #else 8. /* Good luck: the bottom order bits are cyclic. */ 9. #define RND(x) ((rand()>>3) % (x)) 10. #endif 11. 12. rn1(x,y) /* y <= rn1(x,y) < (y+x) */ 13. register x,y; 14. { 15. return(RND(x)+y); 16. } 17. 18. rn2(x) /* 0 <= rn2(x) < x */ 19. register x; 20. { 21. return(RND(x)); 22. } 23. 24. rnd(x) /* 1 <= rnd(x) <= x */ 25. register x; 26. { 27. return(RND(x)+1); 28. } 29. 30. d(n,x) /* n <= d(n,x) <= (n*x) */ 31. register n,x; 32. { 33. register tmp = n; 34. 35. while(n--) tmp += RND(x); 36. return(tmp); 37. } 38. 39. rne(x) /* by stewr 870807 */ 40. register x; 41. { 42. register tmp = 1; 43. while(!rn2(x)) tmp++; 44. return(tmp); 45. } 46. 47. rnz(i) 48. int i; 49. { 50. register long x = i; 51. register long tmp = 1000; 52. tmp += rn2(1000); 53. tmp *= rne(4); 54. if (rn2(2)) { x *= tmp; x /= 1000; } 55. else { x *= 1000; x /= tmp; } 56. return((int)x); 57. }