HP-UX Reference (11i v1 00/12) - 3 Library Functions A-M (vol 6)
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man3/!!!intro.3c
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e
elf_hash(3E) elf_hash(3E)
NAME
elf_hash - compute hash value
SYNOPSIS
cc [flag... ] file... -lelf [library] ...
#include <libelf.h>
unsigned long elf_hash(const char *name);
DESCRIPTION
elf_hash 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 elf_hash uses unsigned arith-
metic to avoid possible differences in various machines’ signed arithmetic. Although name is shown as
char* above, elf_hash treats it as unsigned char* to avoid sign extension differences. Using
char* eliminates type conflicts with expressions such as elf_hash ("name").
ELF files’ symbol hash tables are computed using this function (see elf_getdata(3E) and elf_xlate(3E)). The
hash value returned is guaranteed not to be the bit pattern of all ones (
˜0UL).
SEE ALSO
elf(3E), elf_getdata(3E), elf_xlate(3E).
Section 3−−194 − 1 − HP-UX Release 11i: December 2000
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