- register XPVHV* xhv;
- register U32 hash;
- register HE *entry;
- SV *sv;
- bool is_utf8 = FALSE;
- const char *keysave = key;
-
- if (!hv)
- return 0;
-
- if (klen < 0) {
- klen = -klen;
- is_utf8 = TRUE;
- }
-
- if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
- sv = sv_newmortal();
- mg_copy((SV*)hv, sv, key, klen);
- PL_hv_fetch_sv = sv;
- return &PL_hv_fetch_sv;
- }
-#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
- U32 i;
- for (i = 0; i < klen; ++i)
- if (isLOWER(key[i])) {
- char *nkey = strupr(SvPVX(sv_2mortal(newSVpvn(key,klen))));
- SV **ret = hv_fetch(hv, nkey, klen, 0);
- if (!ret && lval)
- ret = hv_store(hv, key, klen, NEWSV(61,0), 0);
- return ret;
- }
- }
-#endif
- }
-
- /* We use xhv->xhv_foo fields directly instead of HvFOO(hv) to
- avoid unnecessary pointer dereferencing. */
- xhv = (XPVHV*)SvANY(hv);
- if (!xhv->xhv_array /* !HvARRAY(hv) */) {
- if (lval
-#ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */
- || (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env))
-#endif
- )
- Newz(503, xhv->xhv_array /* HvARRAY(hv) */,
- PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */),
- char);
- else
- return 0;
- }
-
- if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT)) {
- STRLEN tmplen = klen;
- /* Just casting the &klen to (STRLEN) won't work well
- * if STRLEN and I32 are of different widths. --jhi */
- key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8);
- klen = tmplen;
- }
-
- PERL_HASH(hash, key, klen);
-
- /* entry = (HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */
- entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
- for (; entry; entry = HeNEXT(entry)) {
- if (HeHASH(entry) != hash) /* strings can't be equal */
- continue;
- if (HeKLEN(entry) != klen)
- continue;
- if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
- continue;
- if (HeKUTF8(entry) != (char)is_utf8)
- continue;
- if (key != keysave)
- Safefree(key);
- return &HeVAL(entry);
- }
-#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
- if (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) {
- unsigned long len;
- char *env = PerlEnv_ENVgetenv_len(key,&len);
- if (env) {
- sv = newSVpvn(env,len);
- SvTAINTED_on(sv);
- if (key != keysave)
- Safefree(key);
- return hv_store(hv,key,klen,sv,hash);
- }
- }
-#endif
- if (lval) { /* gonna assign to this, so it better be there */
- sv = NEWSV(61,0);
- if (key != keysave) { /* must be is_utf8 == 0 */
- SV **ret = hv_store(hv,key,klen,sv,hash);
- Safefree(key);
- return ret;
- }
- else
- return hv_store(hv,key,is_utf8?-klen:klen,sv,hash);
- }
- if (key != keysave)
- Safefree(key);
- return 0;