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get_rnd_text() for rumors and other stuff

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Solve the uneven distribution situation that has been present for
picking random rumors for a long time and for random engravings,
epitaphs, and hallucinatory monster names since 3.6.0.  This relies
on the previous partial solution where short lines have been padded
to a longer length.  When that length is N and random seek lands in
a long line of length L, retry if the position is in the first L-N
characters.  Put differently, it if takes more than N characters to
reach the next newline, reject that random seek and try again.  This
effectively makes long lines behave as if they had the same length
of N as the short lines have been padded to and when all lines are
the same length, all entries have the same chance to be chosen.
This commit is contained in:
PatR
2021-11-27 12:23:01 -08:00
parent 629c2c4094
commit 03476a7c78
7 changed files with 50 additions and 32 deletions
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include/extern.h
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@@ -2263,7 +2263,7 @@ extern const char *Goodbye(void);
/* ### rumors.c ### */
extern char *getrumor(int, char *, boolean);
extern char *get_rnd_text(const char *, char *, int(*)(int));
extern char *get_rnd_text(const char *, char *, int(*)(int), unsigned);
extern void outrumor(int, int);
extern void outoracle(boolean, boolean);
extern void save_oracles(NHFILE *);