elf_hash(3E)                   (ELF Library)                   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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