elf_hash(3E)                   DG/UX R4.11MU05                  elf_hash(3E)


NAME
       elfhash - compute hash value

SYNOPSIS
       cc [flag ...] file ...  -lelf [library ...]

       #include <libelf.h>
       unsigned long elfhash(const char *name);

DESCRIPTION
       elfhash computes a hash value, given a null terminated string, name.
       The returned hash value, h, can be used as a bucket index, typically
       after computing h mod x to ensure appropriate bounds.

       Hash tables may be built on one machine and used on another because
       elfhash uses unsigned arithmetic to avoid possible differences in
       various machines' signed arithmetic.  Although name is shown as char*
       above, elfhash treats it as unsigned char* to avoid sign extension
       differences.  Using char* eliminates type conflicts with expressions
       such as elfhash("name").

       ELF files' symbol hash tables are computed using this function [see
       elfgetdata(3E) and elfxlate(3E)].  The hash value returned is
       guaranteed not to be the bit pattern of all ones (~0UL).

SEE ALSO
       elf(3E), elfgetdata(3E), elfxlate(3E).


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