diff options
Diffstat (limited to 'libc/stdlib/bsearch.c')
| -rw-r--r-- | libc/stdlib/bsearch.c | 53 |
1 files changed, 25 insertions, 28 deletions
diff --git a/libc/stdlib/bsearch.c b/libc/stdlib/bsearch.c index c5a78959a..6f3817b60 100644 --- a/libc/stdlib/bsearch.c +++ b/libc/stdlib/bsearch.c @@ -1,42 +1,39 @@ - /* - * This file lifted in toto from 'Dlibs' on the atari ST (RdeBath) + * This file originally lifted in toto from 'Dlibs' on the atari ST (RdeBath) * * * Dale Schumacher 399 Beacon Ave. * (alias: Dalnefre') St. Paul, MN 55104 * dal@syntel.UUCP United States of America * "It's not reality that's important, but how you perceive things." + * + * Reworked by Erik Andersen <andersen@uclibc.org> */ #include <stdio.h> -static int _bsearch; /* index of element found, or where to - - * insert */ - -char *bsearch(key, base, num, size, cmp) -register char *key; /* item to search for */ -register char *base; /* base address */ -int num; /* number of elements */ -register int size; /* element size in bytes */ -register int (*cmp) (); /* comparison function */ +void * bsearch (const void *key, const void *base, size_t num, size_t size, + int (*cmp) (const void *, const void *)) { - register int a, b, c, dir; + int dir; + size_t a, b, c; + const void *p; - a = 0; - b = num - 1; - while (a <= b) { - c = (a + b) >> 1; /* == ((a + b) / 2) */ - if ((dir = (*cmp) (key, (base + (c * size))))) { - if (dir < 0) - b = c - 1; - else /* (dir > 0) */ - a = c + 1; - } else { - _bsearch = c; - return (base + (c * size)); - } + a = 0; + b = num; + while (a < b) + { + c = (a + b) >> 1; /* == ((a + b) / 2) */ + p = (void *)(((const char *) base) + (c * size)); + dir = (*cmp)(key, p); + if (dir < 0) { + b = c; + } else if (dir > 0) { + a = c + 1; + } else { + return (void *)p; } - _bsearch = b; - return (NULL); + } + + return NULL; } + |