elf_hash(3E)              UNIX System V(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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