diff options
Diffstat (limited to 'mbbsd/stuff.c')
-rw-r--r-- | mbbsd/stuff.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/mbbsd/stuff.c b/mbbsd/stuff.c index 6a37d816..ee645421 100644 --- a/mbbsd/stuff.c +++ b/mbbsd/stuff.c @@ -981,6 +981,27 @@ inline int *intbsearch(int key, const int *base0, int nmemb) return (NULL); } +inline unsigned int * +uintbsearch(const unsigned int key, const unsigned int *base0, const int nmemb) +{ + /* 改自 /usr/src/lib/libc/stdlib/bsearch.c , + 專給搜 int array 用的, 不透過 compar function 故較快些 */ + const char *base = (const char *)base0; + size_t lim; + unsigned int *p; + + for (lim = nmemb; lim != 0; lim >>= 1) { + p = (unsigned int *)(base + (lim >> 1) * 4); + if( key == *p ) + return p; + if( key > *p ){/* key > p: move right */ + base = (char *)p + 4; + lim--; + } /* else move left */ + } + return (NULL); +} + int qsort_intcompar(const void *a, const void *b) { return *(int *)a - *(int *)b; |