X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=av.c;h=b583f7ed6d2bad0e267bce2bbedc64dac45823b8;hb=c7848ba184fac8eca4125f4296d6e09fee2c1846;hp=cad6eaeac49d68c63b1dc44215947ece1c73c898;hpb=4dbf434134c769659b99976eaa99777da8a5b38b;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/av.c b/av.c
index cad6eae..b583f7e 100644
--- a/av.c
+++ b/av.c
@@ -1,6 +1,6 @@
 /*    av.c
  *
- *    Copyright (c) 1991-1994, Larry Wall
+ *    Copyright (c) 1991-1997, Larry Wall
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -30,9 +30,14 @@ AV* av;
     while (key) {
 	sv = AvARRAY(av)[--key];
 	assert(sv);
-	if (sv != &sv_undef)
+	if (sv != &sv_undef) {
+	    dTHR;
 	    (void)SvREFCNT_inc(sv);
+	}
     }
+    key = AvARRAY(av) - AvALLOC(av);
+    while (key)
+	AvALLOC(av)[--key] = &sv_undef;
     AvREAL_on(av);
 }
 
@@ -41,6 +46,7 @@ av_extend(av,key)
 AV *av;
 I32 key;
 {
+    dTHR;			/* only necessary if we have to extend stack */
     if (key > AvMAX(av)) {
 	SV** ary;
 	I32 tmp;
@@ -84,10 +90,8 @@ I32 key;
 		newmax = tmp - 1;
 		New(2,ary, newmax+1, SV*);
 		Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*);
-		if (AvMAX(av) > 64 && !nice_chunk) {
-		    nice_chunk = (char*)AvALLOC(av);
-		    nice_chunk_size = (AvMAX(av) + 1) * sizeof(SV*);
-		}
+		if (AvMAX(av) > 64)
+		    offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*));
 		else
 		    Safefree(AvALLOC(av));
 		AvALLOC(av) = ary;
@@ -131,6 +135,7 @@ I32 lval;
 
     if (SvRMAGICAL(av)) {
 	if (mg_find((SV*)av,'P')) {
+	    dTHR;
 	    sv = sv_newmortal();
 	    mg_copy((SV*)av, sv, 0, key);
 	    Sv = sv;
@@ -179,10 +184,13 @@ SV *val;
 
     if (!av)
 	return 0;
+    if (!val)
+	val = &sv_undef;
 
     if (SvRMAGICAL(av)) {
 	if (mg_find((SV*)av,'P')) {
-	    mg_copy((SV*)av, val, 0, key);
+	    if (val != &sv_undef)
+		mg_copy((SV*)av, val, 0, key);
 	    return 0;
 	}
     }
@@ -192,17 +200,16 @@ SV *val;
 	if (key < 0)
 	    return 0;
     }
-    if (!val)
-	val = &sv_undef;
-
+    if (SvREADONLY(av) && key >= AvFILL(av))
+	croak(no_modify);
+    if (!AvREAL(av) && AvREIFY(av))
+	av_reify(av);
     if (key > AvMAX(av))
 	av_extend(av,key);
-    if (AvREIFY(av))
-	av_reify(av);
-
     ary = AvARRAY(av);
     if (AvFILL(av) < key) {
 	if (!AvREAL(av)) {
+	    dTHR;
 	    if (av == curstack && key > stack_sp - stack_base)
 		stack_sp = stack_base + key;	/* XPUSH in disguise */
 	    do
@@ -249,17 +256,19 @@ register SV **strp;
 
     av = (AV*)NEWSV(8,0);
     sv_upgrade((SV *) av,SVt_PVAV);
-    New(4,ary,size+1,SV*);
-    AvALLOC(av) = ary;
     AvFLAGS(av) = AVf_REAL;
-    SvPVX(av) = (char*)ary;
-    AvFILL(av) = size - 1;
-    AvMAX(av) = size - 1;
-    for (i = 0; i < size; i++) {
-	assert (*strp);
-	ary[i] = NEWSV(7,0);
-	sv_setsv(ary[i], *strp);
-	strp++;
+    if (size) {		/* `defined' was returning undef for size==0 anyway. */
+	New(4,ary,size,SV*);
+	AvALLOC(av) = ary;
+	SvPVX(av) = (char*)ary;
+	AvFILL(av) = size - 1;
+	AvMAX(av) = size - 1;
+	for (i = 0; i < size; i++) {
+	    assert (*strp);
+	    ary[i] = NEWSV(7,0);
+	    sv_setsv(ary[i], *strp);
+	    strp++;
+	}
     }
     return av;
 }
@@ -362,6 +371,8 @@ register AV *av;
 
     if (!av || AvFILL(av) < 0)
 	return &sv_undef;
+    if (SvREADONLY(av))
+	croak(no_modify);
     retval = AvARRAY(av)[AvFILL(av)];
     AvARRAY(av)[AvFILL(av)--] = &sv_undef;
     if (SvSMAGICAL(av))
@@ -379,12 +390,10 @@ register I32 num;
 
     if (!av || num <= 0)
 	return;
-    if (!AvREAL(av)) {
-	if (AvREIFY(av))
-	    av_reify(av);
-	else
-	    croak("Can't unshift");
-    }
+    if (SvREADONLY(av))
+	croak(no_modify);
+    if (!AvREAL(av) && AvREIFY(av))
+	av_reify(av);
     i = AvARRAY(av) - AvALLOC(av);
     if (i) {
 	if (i > num)
@@ -422,6 +431,8 @@ register AV *av;
 
     if (!av || AvFILL(av) < 0)
 	return &sv_undef;
+    if (SvREADONLY(av))
+	croak(no_modify);
     retval = *AvARRAY(av);
     if (AvREAL(av))
 	*AvARRAY(av) = &sv_undef;
@@ -471,3 +482,277 @@ I32 fill;
     else
 	(void)av_store(av,fill,&sv_undef);
 }
+
+SV**
+avhv_fetch(av, key, klen, lval)
+AV *av;
+char *key;
+U32 klen;
+I32 lval;
+{
+    SV **keys, **indsvp;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    indsvp = hv_fetch((HV*)SvRV(*keys), key, klen, FALSE);
+    if (indsvp) {
+	ind = SvIV(*indsvp);
+	if (ind < 1)
+	    croak("Bad index while coercing array into hash");
+    } else {
+	if (!lval)
+	    return 0;
+	
+	ind = AvFILL(av) + 1;
+	hv_store((HV*)SvRV(*keys), key, klen, newSViv(ind), 0);
+    }
+    return av_fetch(av, ind, lval);
+}
+
+SV**
+avhv_fetch_ent(av, keysv, lval, hash)
+AV *av;
+SV *keysv;
+I32 lval;
+U32 hash;
+{
+    SV **keys, **indsvp;
+    HE *he;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    he = hv_fetch_ent((HV*)SvRV(*keys), keysv, FALSE, hash);
+    if (he) {
+	ind = SvIV(HeVAL(he));
+	if (ind < 1)
+	    croak("Bad index while coercing array into hash");
+    } else {
+	if (!lval)
+	    return 0;
+	
+	ind = AvFILL(av) + 1;
+	hv_store_ent((HV*)SvRV(*keys), keysv, newSViv(ind), 0);
+    }
+    return av_fetch(av, ind, lval);
+}
+
+SV**
+avhv_store(av, key, klen, val, hash)
+AV *av;
+char *key;
+U32 klen;
+SV *val;
+U32 hash;
+{
+    SV **keys, **indsvp;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    indsvp = hv_fetch((HV*)SvRV(*keys), key, klen, FALSE);
+    if (indsvp) {
+	ind = SvIV(*indsvp);
+	if (ind < 1)
+	    croak("Bad index while coercing array into hash");
+    } else {
+	ind = AvFILL(av) + 1;
+	hv_store((HV*)SvRV(*keys), key, klen, newSViv(ind), hash);
+    }
+    return av_store(av, ind, val);
+}
+
+SV**
+avhv_store_ent(av, keysv, val, hash)
+AV *av;
+SV *keysv;
+SV *val;
+U32 hash;
+{
+    SV **keys;
+    HE *he;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    he = hv_fetch_ent((HV*)SvRV(*keys), keysv, FALSE, hash);
+    if (he) {
+	ind = SvIV(HeVAL(he));
+	if (ind < 1)
+	    croak("Bad index while coercing array into hash");
+    } else {
+	ind = AvFILL(av) + 1;
+	hv_store_ent((HV*)SvRV(*keys), keysv, newSViv(ind), hash);
+    }
+    return av_store(av, ind, val);
+}
+
+bool
+avhv_exists_ent(av, keysv, hash)
+AV *av;
+SV *keysv;
+U32 hash;
+{
+    SV **keys;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    return hv_exists_ent((HV*)SvRV(*keys), keysv, hash);
+}
+
+bool
+avhv_exists(av, key, klen)
+AV *av;
+char *key;
+U32 klen;
+{
+    SV **keys;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    return hv_exists((HV*)SvRV(*keys), key, klen);
+}
+
+/* avhv_delete leaks. Caller can re-index and compress if so desired. */
+SV *
+avhv_delete(av, key, klen, flags)
+AV *av;
+char *key;
+U32 klen;
+I32 flags;
+{
+    SV **keys;
+    SV *sv;
+    SV **svp;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    sv = hv_delete((HV*)SvRV(*keys), key, klen, 0);
+    if (!sv)
+	return Nullsv;
+    ind = SvIV(sv);
+    if (ind < 1)
+	croak("Bad index while coercing array into hash");
+    svp = av_fetch(av, ind, FALSE);
+    if (!svp)
+	return Nullsv;
+    if (flags & G_DISCARD) {
+	sv = Nullsv;
+	SvREFCNT_dec(*svp);
+    } else {
+	sv = sv_2mortal(*svp);
+    }
+    *svp = &sv_undef;
+    return sv;
+}
+
+/* avhv_delete_ent leaks. Caller can re-index and compress if so desired. */
+SV *
+avhv_delete_ent(av, keysv, flags, hash)
+AV *av;
+SV *keysv;
+I32 flags;
+U32 hash;
+{
+    SV **keys;
+    SV *sv;
+    SV **svp;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    sv = hv_delete_ent((HV*)SvRV(*keys), keysv, 0, hash);
+    if (!sv)
+	return Nullsv;
+    ind = SvIV(sv);
+    if (ind < 1)
+	croak("Bad index while coercing array into hash");
+    svp = av_fetch(av, ind, FALSE);
+    if (!svp)
+	return Nullsv;
+    if (flags & G_DISCARD) {
+	sv = Nullsv;
+	SvREFCNT_dec(*svp);
+    } else {
+	sv = sv_2mortal(*svp);
+    }
+    *svp = &sv_undef;
+    return sv;
+}
+
+I32
+avhv_iterinit(av)
+AV *av;
+{
+    SV **keys;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    return hv_iterinit((HV*)SvRV(*keys));
+}
+
+HE *
+avhv_iternext(av)
+AV *av;
+{
+    SV **keys;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    return hv_iternext((HV*)SvRV(*keys));
+}
+
+SV *
+avhv_iterval(av, entry)
+AV *av;
+register HE *entry;
+{
+    SV **keys;
+    SV *sv;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    sv = hv_iterval((HV*)SvRV(*keys), entry);
+    ind = SvIV(sv);
+    if (ind < 1)
+	croak("Bad index while coercing array into hash");
+    return *av_fetch(av, ind, TRUE);
+}
+
+SV *
+avhv_iternextsv(av, key, retlen)
+AV *av;
+char **key;
+I32 *retlen;
+{
+    SV **keys;
+    HE *he;
+    SV *sv;
+    I32 ind;
+    
+    keys = av_fetch(av, 0, FALSE);
+    if (!keys || !SvROK(*keys) || SvTYPE(SvRV(*keys)) != SVt_PVHV)
+	croak("Can't coerce array into hash");
+    if ( (he = hv_iternext((HV*)SvRV(*keys))) == NULL)
+        return NULL;
+    *key = hv_iterkey(he, retlen);
+    sv = hv_iterval((HV*)SvRV(*keys), he);
+    ind = SvIV(sv);
+    if (ind < 1)
+	croak("Bad index while coercing array into hash");
+    return *av_fetch(av, ind, TRUE);
+}