ohash_qlookup man page on OpenBSD

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OPEN_HASH_HELPER(3)	  OpenBSD Programmer's Manual	   OPEN_HASH_HELPER(3)

NAME
     ohash_interval, ohash_create_entry, ohash_qlookup, ohash_qlookupi -
     helper functions for open hashing

SYNOPSIS
     #include <stdint.h>
     #include <stddef.h>
     #include <ohash.h>

     u_int32_t
     ohash_interval(const char *start, const char **pend);

     void *
     ohash_create_entry(struct ohash_info *info, const char *start, const char
     **pend);

     unsigned int
     ohash_qlookupi(struct ohash *h, const char *start, const char **pend);

     unsigned int
     ohash_qlookup(struct ohash *h, const char *start);

DESCRIPTION
     These functions are commonly used to simplify open hashing usage, and use
     similar conventions.  They operate indifferently on NUL-terminated
     strings (by setting *pend = NULL) or memory ranges (delimited by start
     and *pend).  For NUL-terminated strings, as a side effect, those
     functions set *pend to the terminating NUL byte.

     ohash_interval() is a simple hashing function that yields good results on
     common data sets.

     ohash_create_entry() can be used to create a new record with a given key.
     In that case, the alloc field of info should point to a malloc(3)-like
     function to allocate the storage.

     ohash_qlookupi() is a wrapper function that simply calls ohash_interval()
     and ohash_lookup_interval().

     ohash_qlookup() is a variation on ohash_qlookupi() designed for NUL-
     terminated strings.

SEE ALSO
     ohash_init(3)

STANDARDS
     Those functions are completely non-standard and should be avoided in
     portable programs.

HISTORY
     Those functions were designed and written for OpenBSD make(1) by Marc
     Espie in 1999.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9
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