pike.git/ src/ builtin_functions.c

Branch: Tag:

2006-02-02

2006-02-02 10:23:37 by Jonas Wallden <jonasw@roxen.com>

Backport of hash_value() from 7.6.

Rev: src/builtin_functions.c:1.479

2:   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: builtin_functions.c,v 1.478 2006/01/11 04:46:52 mast Exp $ + || $Id: builtin_functions.c,v 1.479 2006/02/02 10:23:37 jonasw Exp $   */      #include "global.h" - RCSID("$Id: builtin_functions.c,v 1.478 2006/01/11 04:46:52 mast Exp $"); + RCSID("$Id: builtin_functions.c,v 1.479 2006/02/02 10:23:37 jonasw Exp $");   #include "interpret.h"   #include "svalue.h"   #include "pike_macros.h"
202:    push_int64(i);   }    + /*! @decl int hash_value (mixed value) +  *! +  *! Return a hash value for the argument. It's an integer in the +  *! native integer range. +  *! +  *! The hash will be the same for the same value in the running +  *! process only (the memory address is typically used as the basis +  *! for the hash value). +  *! +  *! If the value is an object with an @[lfun::__hash], that function +  *! is called and its result is returned. +  *! +  *! @note +  *! This is the hashing method used by mappings. +  *! +  *! @seealso +  *! @[hash] +  */ + void f_hash_value(INT32 args) + { +  unsigned INT32 h; +  +  if(!args) +  SIMPLE_TOO_FEW_ARGS_ERROR("hash_value",1); +  +  h = hash_svalue (Pike_sp - args); +  pop_n_elems (args); +  push_int (h); + } +    /*! @decl mixed copy_value(mixed value)    *!    *! Copy a value recursively.
7999:    ADD_EFUN("hash_7_0",f_compat_hash,    tFunc(tStr tOr(tInt,tVoid),tInt),OPT_TRY_OPTIMIZE);    +  ADD_EFUN("hash_value",f_hash_value,tFunc(tMix,tInt),OPT_TRY_OPTIMIZE); +    /* function(string|array:int*)|function(mapping(1=mixed:mixed)|multiset(1=mixed):array(1))|function(object|program:string*) */    ADD_EFUN2("indices",f_indices,    tOr3(tFunc(tOr(tStr,tArray),tArr(tInt)),