[perl5.git] / doop.c

/*    doop.c
 *
 *    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.
 *
 */

/*
 * "'So that was the job I felt I had to do when I started,' thought Sam."
 */

#include "EXTERN.h"
#include "perl.h"

#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
#endif

I32
do_trans(sv,arg)
SV *sv;
OP *arg;
{
    register short *tbl;
    register U8 *s;
    register U8 *send;
    register U8 *d;
    register I32 ch;
    register I32 matches = 0;
    register I32 squash = op->op_private & OPpTRANS_SQUASH;
    STRLEN len;

    if (SvREADONLY(sv))
	croak(no_modify);
    tbl = (short*)cPVOP->op_pv;
    s = (U8*)SvPV(sv, len);
    if (!len)
	return 0;
    if (!SvPOKp(sv))
	s = (U8*)SvPV_force(sv, len);
    (void)SvPOK_only(sv);
    send = s + len;
    if (!tbl || !s)
	croak("panic: do_trans");
    DEBUG_t( deb("2.TBL\n"));
    if (!op->op_private) {
	while (s < send) {
	    if ((ch = tbl[*s]) >= 0) {
		matches++;
		*s = ch;
	    }
	    s++;
	}
    }
    else {
	d = s;
	while (s < send) {
	    if ((ch = tbl[*s]) >= 0) {
		*d = ch;
		if (matches++ && squash) {
		    if (d[-1] == *d)
			matches--;
		    else
			d++;
		}
		else
		    d++;
	    }
	    else if (ch == -1)		/* -1 is unmapped character */
		*d++ = *s;		/* -2 is delete character */
	    s++;
	}
	matches += send - d;	/* account for disappeared chars */
	*d = '\0';
	SvCUR_set(sv, d - (U8*)SvPVX(sv));
    }
    SvSETMAGIC(sv);
    return matches;
}

void
do_join(sv,del,mark,sp)
register SV *sv;
SV *del;
register SV **mark;
register SV **sp;
{
    SV **oldmark = mark;
    register I32 items = sp - mark;
    register STRLEN len;
    STRLEN delimlen;
    register char *delim = SvPV(del, delimlen);
    STRLEN tmplen;

    mark++;
    len = (items > 0 ? (delimlen * (items - 1) ) : 0);
    if (SvTYPE(sv) < SVt_PV)
	sv_upgrade(sv, SVt_PV);
    if (SvLEN(sv) < len + items) {	/* current length is way too short */
	while (items-- > 0) {
	    if (*mark) {
		SvPV(*mark, tmplen);
		len += tmplen;
	    }
	    mark++;
	}
	SvGROW(sv, len + 1);		/* so try to pre-extend */

	mark = oldmark;
	items = sp - mark;;
	++mark;
    }

    if (items-- > 0) {
	char *s;

	if (*mark) {
	    s = SvPV(*mark, tmplen);
	    sv_setpvn(sv, s, tmplen);
	}
	else
	    sv_setpv(sv, "");
	mark++;
    }
    else
	sv_setpv(sv,"");
    len = delimlen;
    if (len) {
	for (; items > 0; items--,mark++) {
	    sv_catpvn(sv,delim,len);
	    sv_catsv(sv,*mark);
	}
    }
    else {
	for (; items > 0; items--,mark++)
	    sv_catsv(sv,*mark);
    }
    SvSETMAGIC(sv);
}

void
do_sprintf(sv,len,sarg)
SV *sv;
I32 len;
SV **sarg;
{
    STRLEN patlen;
    char *pat = SvPV(*sarg, patlen);
    bool do_taint = FALSE;

    sv_vsetpvfn(sv, pat, patlen, Null(va_list*), sarg + 1, len - 1, &do_taint);
    SvSETMAGIC(sv);
    if (do_taint)
	SvTAINTED_on(sv);
}

void
do_vecset(sv)
SV *sv;
{
    SV *targ = LvTARG(sv);
    register I32 offset;
    register I32 size;
    register unsigned char *s;
    register unsigned long lval;
    I32 mask;
    STRLEN targlen;
    STRLEN len;

    if (!targ)
	return;
    s = (unsigned char*)SvPV_force(targ, targlen);
    lval = U_L(SvNV(sv));
    offset = LvTARGOFF(sv);
    size = LvTARGLEN(sv);
    
    len = (offset + size + 7) / 8;
    if (len > targlen) {
	s = (unsigned char*)SvGROW(targ, len + 1);
	(void)memzero(s + targlen, len - targlen + 1);
	SvCUR_set(targ, len);
    }
    
    if (size < 8) {
	mask = (1 << size) - 1;
	size = offset & 7;
	lval &= mask;
	offset >>= 3;
	s[offset] &= ~(mask << size);
	s[offset] |= lval << size;
    }
    else {
	offset >>= 3;
	if (size == 8)
	    s[offset] = lval & 255;
	else if (size == 16) {
	    s[offset] = (lval >> 8) & 255;
	    s[offset+1] = lval & 255;
	}
	else if (size == 32) {
	    s[offset] = (lval >> 24) & 255;
	    s[offset+1] = (lval >> 16) & 255;
	    s[offset+2] = (lval >> 8) & 255;
	    s[offset+3] = lval & 255;
	}
    }
}

void
do_chop(astr,sv)
register SV *astr;
register SV *sv;
{
    STRLEN len;
    char *s;
    
    if (SvTYPE(sv) == SVt_PVAV) {
	register I32 i;
        I32 max;
	AV* av = (AV*)sv;
        max = AvFILL(av);
        for (i = 0; i <= max; i++) {
	    sv = (SV*)av_fetch(av, i, FALSE);
	    if (sv && ((sv = *(SV**)sv), sv != &sv_undef))
		do_chop(astr, sv);
	}
        return;
    }
    if (SvTYPE(sv) == SVt_PVHV) {
        HV* hv = (HV*)sv;
	HE* entry;
        (void)hv_iterinit(hv);
        /*SUPPRESS 560*/
        while (entry = hv_iternext(hv))
            do_chop(astr,hv_iterval(hv,entry));
        return;
    }
    s = SvPV(sv, len);
    if (len && !SvPOK(sv))
	s = SvPV_force(sv, len);
    if (s && len) {
	s += --len;
	sv_setpvn(astr, s, 1);
	*s = '\0';
	SvCUR_set(sv, len);
	SvNIOK_off(sv);
    }
    else
	sv_setpvn(astr, "", 0);
    SvSETMAGIC(sv);
} 

I32
do_chomp(sv)
register SV *sv;
{
    register I32 count;
    STRLEN len;
    char *s;

    if (RsSNARF(rs))
	return 0;
    count = 0;
    if (SvTYPE(sv) == SVt_PVAV) {
	register I32 i;
        I32 max;
	AV* av = (AV*)sv;
        max = AvFILL(av);
        for (i = 0; i <= max; i++) {
	    sv = (SV*)av_fetch(av, i, FALSE);
	    if (sv && ((sv = *(SV**)sv), sv != &sv_undef))
		count += do_chomp(sv);
	}
        return count;
    }
    if (SvTYPE(sv) == SVt_PVHV) {
        HV* hv = (HV*)sv;
	HE* entry;
        (void)hv_iterinit(hv);
        /*SUPPRESS 560*/
        while (entry = hv_iternext(hv))
            count += do_chomp(hv_iterval(hv,entry));
        return count;
    }
    s = SvPV(sv, len);
    if (len && !SvPOKp(sv))
	s = SvPV_force(sv, len);
    if (s && len) {
	s += --len;
	if (RsPARA(rs)) {
	    if (*s != '\n')
		goto nope;
	    ++count;
	    while (len && s[-1] == '\n') {
		--len;
		--s;
		++count;
	    }
	}
	else {
	    STRLEN rslen;
	    char *rsptr = SvPV(rs, rslen);
	    if (rslen == 1) {
		if (*s != *rsptr)
		    goto nope;
		++count;
	    }
	    else {
		if (len < rslen - 1)
		    goto nope;
		len -= rslen - 1;
		s -= rslen - 1;
		if (memNE(s, rsptr, rslen))
		    goto nope;
		count += rslen;
	    }
	}
	*s = '\0';
	SvCUR_set(sv, len);
	SvNIOK_off(sv);
    }
  nope:
    SvSETMAGIC(sv);
    return count;
} 

void
do_vop(optype,sv,left,right)
I32 optype;
SV *sv;
SV *left;
SV *right;
{
#ifdef LIBERAL
    register long *dl;
    register long *ll;
    register long *rl;
#endif
    register char *dc;
    STRLEN leftlen;
    STRLEN rightlen;
    register char *lc;
    register char *rc;
    register I32 len;
    I32 lensave;
    char *lsave;
    char *rsave;

    if (sv != left || (optype != OP_BIT_AND && !SvOK(sv) && !SvGMAGICAL(sv)))
	sv_setpvn(sv, "", 0);	/* avoid undef warning on |= and ^= */
    lsave = lc = SvPV(left, leftlen);
    rsave = rc = SvPV(right, rightlen);
    len = leftlen < rightlen ? leftlen : rightlen;
    lensave = len;
    if (SvOK(sv) || SvTYPE(sv) > SVt_PVMG) {
	dc = SvPV_force(sv, na);
	if (SvCUR(sv) < len) {
	    dc = SvGROW(sv, len + 1);
	    (void)memzero(dc + SvCUR(sv), len - SvCUR(sv) + 1);
	}
    }
    else {
	I32 needlen = ((optype == OP_BIT_AND)
			? len : (leftlen > rightlen ? leftlen : rightlen));
	Newz(801, dc, needlen + 1, char);
	(void)sv_usepvn(sv, dc, needlen);
	dc = SvPVX(sv);		/* sv_usepvn() calls Renew() */
    }
    SvCUR_set(sv, len);
    (void)SvPOK_only(sv);
#ifdef LIBERAL
    if (len >= sizeof(long)*4 &&
	!((long)dc % sizeof(long)) &&
	!((long)lc % sizeof(long)) &&
	!((long)rc % sizeof(long)))	/* It's almost always aligned... */
    {
	I32 remainder = len % (sizeof(long)*4);
	len /= (sizeof(long)*4);

	dl = (long*)dc;
	ll = (long*)lc;
	rl = (long*)rc;

	switch (optype) {
	case OP_BIT_AND:
	    while (len--) {
		*dl++ = *ll++ & *rl++;
		*dl++ = *ll++ & *rl++;
		*dl++ = *ll++ & *rl++;
		*dl++ = *ll++ & *rl++;
	    }
	    break;
	case OP_BIT_XOR:
	    while (len--) {
		*dl++ = *ll++ ^ *rl++;
		*dl++ = *ll++ ^ *rl++;
		*dl++ = *ll++ ^ *rl++;
		*dl++ = *ll++ ^ *rl++;
	    }
	    break;
	case OP_BIT_OR:
	    while (len--) {
		*dl++ = *ll++ | *rl++;
		*dl++ = *ll++ | *rl++;
		*dl++ = *ll++ | *rl++;
		*dl++ = *ll++ | *rl++;
	    }
	}

	dc = (char*)dl;
	lc = (char*)ll;
	rc = (char*)rl;

	len = remainder;
    }
#endif
    {
	switch (optype) {
	case OP_BIT_AND:
	    while (len--)
		*dc++ = *lc++ & *rc++;
	    break;
	case OP_BIT_XOR:
	    while (len--)
		*dc++ = *lc++ ^ *rc++;
	    goto mop_up;
	case OP_BIT_OR:
	    while (len--)
		*dc++ = *lc++ | *rc++;
	  mop_up:
	    len = lensave;
	    if (rightlen > len)
		sv_catpvn(sv, rsave + len, rightlen - len);
	    else if (leftlen > len)
		sv_catpvn(sv, lsave + len, leftlen - len);
	    else
		*SvEND(sv) = '\0';
	    break;
	}
    }
}

OP *
do_kv(ARGS)
dARGS
{
    dSP;
    HV *hv = (HV*)POPs;
    register HE *entry;
    SV *tmpstr;
    I32 gimme = GIMME_V;
    I32 dokeys =   (op->op_type == OP_KEYS);
    I32 dovalues = (op->op_type == OP_VALUES);

    if (op->op_type == OP_RV2HV || op->op_type == OP_PADHV) 
	dokeys = dovalues = TRUE;

    if (!hv) {
	if (op->op_flags & OPf_MOD) {	/* lvalue */
	    dTARGET;		/* make sure to clear its target here */
	    if (SvTYPE(TARG) == SVt_PVLV)
		LvTARG(TARG) = Nullsv;
	    PUSHs(TARG);
	}
	RETURN;
    }

    (void)hv_iterinit(hv);	/* always reset iterator regardless */

    if (gimme == G_VOID)
	RETURN;

    if (gimme == G_SCALAR) {
	I32 i;
	dTARGET;

	if (op->op_flags & OPf_MOD) {	/* lvalue */
	    if (SvTYPE(TARG) < SVt_PVLV) {
		sv_upgrade(TARG, SVt_PVLV);
		sv_magic(TARG, Nullsv, 'k', Nullch, 0);
	    }
	    LvTYPE(TARG) = 'k';
	    LvTARG(TARG) = (SV*)hv;
	    PUSHs(TARG);
	    RETURN;
	}

	if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
	    i = HvKEYS(hv);
	else {
	    i = 0;
	    /*SUPPRESS 560*/
	    while (entry = hv_iternext(hv)) {
		i++;
	    }
	}
	PUSHi( i );
	RETURN;
    }

    /* Guess how much room we need.  hv_max may be a few too many.  Oh well. */
    EXTEND(sp, HvMAX(hv) * (dokeys + dovalues));

    PUTBACK;	/* hv_iternext and hv_iterval might clobber stack_sp */
    while (entry = hv_iternext(hv)) {
	SPAGAIN;
	if (dokeys)
	    XPUSHs(hv_iterkeysv(entry));	/* won't clobber stack_sp */
	if (dovalues) {
	    tmpstr = sv_newmortal();
	    PUTBACK;
	    sv_setsv(tmpstr,hv_iterval(hv,entry));
	    DEBUG_H(sv_setpvf(tmpstr, "%lu%%%d=%lu",
			    (unsigned long)HeHASH(entry),
			    HvMAX(hv)+1,
			    (unsigned long)(HeHASH(entry) & HvMAX(hv))));
	    SPAGAIN;
	    XPUSHs(tmpstr);
	}
	PUTBACK;
    }
    return NORMAL;
}
Commit	Line	Data
a0d0e21e	1	/* doop.c
79072805	2	*
9607fc9c	3	* Copyright (c) 1991-1997, Larry Wall
79072805 LW	4	*
	5	* You may distribute under the terms of either the GNU General Public
	6	* License or the Artistic License, as specified in the README file.
	7	*
a0d0e21e LW	8	*/
	9
	10	/*
	11	* "'So that was the job I felt I had to do when I started,' thought Sam."
79072805 LW	12	*/
	13
	14	#include "EXTERN.h"
	15	#include "perl.h"
	16
	17	#if !defined(NSIG) \|\| defined(M_UNIX) \|\| defined(M_XENIX)
	18	#include <signal.h>
	19	#endif
	20
79072805 LW	21	I32
	22	do_trans(sv,arg)
	23	SV *sv;
	24	OP *arg;
	25	{
	26	register short *tbl;
1476d272	27	register U8 *s;
	28	register U8 *send;
	29	register U8 *d;
79072805	30	register I32 ch;
1476d272	31	register I32 matches = 0;
79072805	32	register I32 squash = op->op_private & OPpTRANS_SQUASH;
463ee0b2	33	STRLEN len;
79072805	34
a0d0e21e LW	35	if (SvREADONLY(sv))
a0d0e21e LW	36	croak(no_modify);
1476d272	37	tbl = (short*)cPVOP->op_pv;
1476d272	38	s = (U8*)SvPV(sv, len);
a0d0e21e LW	39	if (!len)
	40	return 0;
	41	if (!SvPOKp(sv))
1476d272	42	s = (U8*)SvPV_force(sv, len);
a0d0e21e	43	(void)SvPOK_only(sv);
463ee0b2	44	send = s + len;
79072805	45	if (!tbl \|\| !s)
463ee0b2	46	croak("panic: do_trans");
79072805 LW	47	DEBUG_t( deb("2.TBL\n"));
	48	if (!op->op_private) {
	49	while (s < send) {
1476d272	50	if ((ch = tbl[*s]) >= 0) {
79072805 LW	51	matches++;
	52	*s = ch;
	53	}
	54	s++;
	55	}
	56	}
	57	else {
	58	d = s;
	59	while (s < send) {
1476d272	60	if ((ch = tbl[*s]) >= 0) {
79072805 LW	61	*d = ch;
	62	if (matches++ && squash) {
	63	if (d[-1] == *d)
	64	matches--;
	65	else
	66	d++;
	67	}
	68	else
	69	d++;
	70	}
	71	else if (ch == -1) /* -1 is unmapped character */
	72	d++ = s; /* -2 is delete character */
	73	s++;
	74	}
	75	matches += send - d; /* account for disappeared chars */
	76	*d = '\0';
1476d272	77	SvCUR_set(sv, d - (U8*)SvPVX(sv));
79072805 LW	78	}
	79	SvSETMAGIC(sv);
	80	return matches;
	81	}
	82
	83	void
	84	do_join(sv,del,mark,sp)
	85	register SV *sv;
	86	SV *del;
	87	register SV **mark;
	88	register SV **sp;
	89	{
	90	SV **oldmark = mark;
	91	register I32 items = sp - mark;
79072805	92	register STRLEN len;
463ee0b2 LW	93	STRLEN delimlen;
	94	register char *delim = SvPV(del, delimlen);
	95	STRLEN tmplen;
79072805 LW	96
	97	mark++;
	98	len = (items > 0 ? (delimlen * (items - 1) ) : 0);
	99	if (SvTYPE(sv) < SVt_PV)
	100	sv_upgrade(sv, SVt_PV);
	101	if (SvLEN(sv) < len + items) { /* current length is way too short */
	102	while (items-- > 0) {
	103	if (*mark) {
463ee0b2 LW	104	SvPV(*mark, tmplen);
463ee0b2 LW	105	len += tmplen;
79072805 LW	106	}
	107	mark++;
	108	}
	109	SvGROW(sv, len + 1); /* so try to pre-extend */
	110
	111	mark = oldmark;
	112	items = sp - mark;;
	113	++mark;
	114	}
	115
463ee0b2	116	if (items-- > 0) {
8990e307 LW	117	char *s;
	118
	119	if (*mark) {
	120	s = SvPV(*mark, tmplen);
	121	sv_setpvn(sv, s, tmplen);
	122	}
	123	else
	124	sv_setpv(sv, "");
463ee0b2 LW	125	mark++;
463ee0b2 LW	126	}
79072805 LW	127	else
	128	sv_setpv(sv,"");
	129	len = delimlen;
	130	if (len) {
	131	for (; items > 0; items--,mark++) {
	132	sv_catpvn(sv,delim,len);
	133	sv_catsv(sv,*mark);
	134	}
	135	}
	136	else {
	137	for (; items > 0; items--,mark++)
	138	sv_catsv(sv,*mark);
	139	}
	140	SvSETMAGIC(sv);
	141	}
	142
	143	void
	144	do_sprintf(sv,len,sarg)
46fc3d4c	145	SV *sv;
	146	I32 len;
	147	SV **sarg;
79072805	148	{
46fc3d4c	149	STRLEN patlen;
	150	char pat = SvPV(sarg, patlen);
	151	bool do_taint = FALSE;
	152
	153	sv_vsetpvfn(sv, pat, patlen, Null(va_list*), sarg + 1, len - 1, &do_taint);
79072805	154	SvSETMAGIC(sv);
46fc3d4c	155	if (do_taint)
46fc3d4c	156	SvTAINTED_on(sv);
79072805 LW	157	}
	158
	159	void
	160	do_vecset(sv)
	161	SV *sv;
	162	{
	163	SV *targ = LvTARG(sv);
	164	register I32 offset;
	165	register I32 size;
8990e307 LW	166	register unsigned char *s;
8990e307 LW	167	register unsigned long lval;
79072805	168	I32 mask;
a0d0e21e LW	169	STRLEN targlen;
a0d0e21e LW	170	STRLEN len;
79072805	171
8990e307 LW	172	if (!targ)
8990e307 LW	173	return;
a0d0e21e	174	s = (unsigned char*)SvPV_force(targ, targlen);
8990e307	175	lval = U_L(SvNV(sv));
79072805 LW	176	offset = LvTARGOFF(sv);
79072805 LW	177	size = LvTARGLEN(sv);
a0d0e21e LW	178
	179	len = (offset + size + 7) / 8;
	180	if (len > targlen) {
	181	s = (unsigned char*)SvGROW(targ, len + 1);
	182	(void)memzero(s + targlen, len - targlen + 1);
	183	SvCUR_set(targ, len);
	184	}
	185
79072805 LW	186	if (size < 8) {
	187	mask = (1 << size) - 1;
	188	size = offset & 7;
	189	lval &= mask;
	190	offset >>= 3;
	191	s[offset] &= ~(mask << size);
	192	s[offset] \|= lval << size;
	193	}
	194	else {
a0d0e21e	195	offset >>= 3;
79072805 LW	196	if (size == 8)
	197	s[offset] = lval & 255;
	198	else if (size == 16) {
	199	s[offset] = (lval >> 8) & 255;
	200	s[offset+1] = lval & 255;
	201	}
	202	else if (size == 32) {
	203	s[offset] = (lval >> 24) & 255;
	204	s[offset+1] = (lval >> 16) & 255;
	205	s[offset+2] = (lval >> 8) & 255;
	206	s[offset+3] = lval & 255;
	207	}
	208	}
	209	}
	210
	211	void
	212	do_chop(astr,sv)
	213	register SV *astr;
	214	register SV *sv;
	215	{
463ee0b2	216	STRLEN len;
a0d0e21e LW	217	char *s;
a0d0e21e LW	218
79072805	219	if (SvTYPE(sv) == SVt_PVAV) {
a0d0e21e LW	220	register I32 i;
	221	I32 max;
	222	AV* av = (AV*)sv;
	223	max = AvFILL(av);
	224	for (i = 0; i <= max; i++) {
	225	sv = (SV*)av_fetch(av, i, FALSE);
	226	if (sv && ((sv = (SV*)sv), sv != &sv_undef))
	227	do_chop(astr, sv);
	228	}
	229	return;
79072805 LW	230	}
79072805 LW	231	if (SvTYPE(sv) == SVt_PVHV) {
a0d0e21e LW	232	HV* hv = (HV*)sv;
	233	HE* entry;
	234	(void)hv_iterinit(hv);
	235	/SUPPRESS 560/
	236	while (entry = hv_iternext(hv))
	237	do_chop(astr,hv_iterval(hv,entry));
	238	return;
79072805	239	}
a0d0e21e	240	s = SvPV(sv, len);
748a9306	241	if (len && !SvPOK(sv))
a0d0e21e LW	242	s = SvPV_force(sv, len);
	243	if (s && len) {
	244	s += --len;
	245	sv_setpvn(astr, s, 1);
	246	*s = '\0';
	247	SvCUR_set(sv, len);
	248	SvNIOK_off(sv);
79072805 LW	249	}
79072805 LW	250	else
a0d0e21e LW	251	sv_setpvn(astr, "", 0);
	252	SvSETMAGIC(sv);
	253	}
	254
	255	I32
	256	do_chomp(sv)
	257	register SV *sv;
	258	{
c07a80fd	259	register I32 count;
a0d0e21e LW	260	STRLEN len;
a0d0e21e LW	261	char *s;
c07a80fd	262
	263	if (RsSNARF(rs))
	264	return 0;
	265	count = 0;
a0d0e21e LW	266	if (SvTYPE(sv) == SVt_PVAV) {
	267	register I32 i;
	268	I32 max;
	269	AV* av = (AV*)sv;
	270	max = AvFILL(av);
	271	for (i = 0; i <= max; i++) {
	272	sv = (SV*)av_fetch(av, i, FALSE);
	273	if (sv && ((sv = (SV*)sv), sv != &sv_undef))
	274	count += do_chomp(sv);
	275	}
	276	return count;
	277	}
	278	if (SvTYPE(sv) == SVt_PVHV) {
	279	HV* hv = (HV*)sv;
	280	HE* entry;
	281	(void)hv_iterinit(hv);
	282	/SUPPRESS 560/
	283	while (entry = hv_iternext(hv))
	284	count += do_chomp(hv_iterval(hv,entry));
	285	return count;
	286	}
	287	s = SvPV(sv, len);
	288	if (len && !SvPOKp(sv))
	289	s = SvPV_force(sv, len);
	290	if (s && len) {
	291	s += --len;
c07a80fd	292	if (RsPARA(rs)) {
a0d0e21e LW	293	if (*s != '\n')
	294	goto nope;
	295	++count;
	296	while (len && s[-1] == '\n') {
	297	--len;
	298	--s;
	299	++count;
	300	}
	301	}
a0d0e21e	302	else {
c07a80fd	303	STRLEN rslen;
	304	char *rsptr = SvPV(rs, rslen);
	305	if (rslen == 1) {
	306	if (s != rsptr)
	307	goto nope;
	308	++count;
	309	}
	310	else {
8c2cee6f	311	if (len < rslen - 1)
c07a80fd	312	goto nope;
	313	len -= rslen - 1;
	314	s -= rslen - 1;
36477c24	315	if (memNE(s, rsptr, rslen))
c07a80fd	316	goto nope;
	317	count += rslen;
	318	}
a0d0e21e	319	}
a0d0e21e LW	320	*s = '\0';
	321	SvCUR_set(sv, len);
	322	SvNIOK_off(sv);
	323	}
	324	nope:
	325	SvSETMAGIC(sv);
	326	return count;
	327	}
79072805 LW	328
	329	void
	330	do_vop(optype,sv,left,right)
	331	I32 optype;
	332	SV *sv;
	333	SV *left;
	334	SV *right;
	335	{
	336	#ifdef LIBERAL
	337	register long *dl;
	338	register long *ll;
	339	register long *rl;
	340	#endif
	341	register char *dc;
463ee0b2 LW	342	STRLEN leftlen;
463ee0b2 LW	343	STRLEN rightlen;
7a4c00b4	344	register char *lc;
7a4c00b4	345	register char *rc;
79072805	346	register I32 len;
a0d0e21e	347	I32 lensave;
7a4c00b4	348	char *lsave;
7a4c00b4	349	char *rsave;
79072805	350
1fbd88dc CS	351	if (sv != left \|\| (optype != OP_BIT_AND && !SvOK(sv) && !SvGMAGICAL(sv)))
1fbd88dc CS	352	sv_setpvn(sv, "", 0); /* avoid undef warning on \|= and ^= */
7a4c00b4	353	lsave = lc = SvPV(left, leftlen);
7a4c00b4	354	rsave = rc = SvPV(right, rightlen);
93a17b20	355	len = leftlen < rightlen ? leftlen : rightlen;
a0d0e21e	356	lensave = len;
7a4c00b4	357	if (SvOK(sv) \|\| SvTYPE(sv) > SVt_PVMG) {
ff68c719	358	dc = SvPV_force(sv, na);
	359	if (SvCUR(sv) < len) {
	360	dc = SvGROW(sv, len + 1);
	361	(void)memzero(dc + SvCUR(sv), len - SvCUR(sv) + 1);
	362	}
	363	}
	364	else {
	365	I32 needlen = ((optype == OP_BIT_AND)
	366	? len : (leftlen > rightlen ? leftlen : rightlen));
	367	Newz(801, dc, needlen + 1, char);
	368	(void)sv_usepvn(sv, dc, needlen);
	369	dc = SvPVX(sv); /* sv_usepvn() calls Renew() */
79072805	370	}
a0d0e21e LW	371	SvCUR_set(sv, len);
a0d0e21e LW	372	(void)SvPOK_only(sv);
79072805 LW	373	#ifdef LIBERAL
	374	if (len >= sizeof(long)*4 &&
	375	!((long)dc % sizeof(long)) &&
	376	!((long)lc % sizeof(long)) &&
	377	!((long)rc % sizeof(long))) /* It's almost always aligned... */
	378	{
	379	I32 remainder = len % (sizeof(long)*4);
	380	len /= (sizeof(long)*4);
	381
	382	dl = (long*)dc;
	383	ll = (long*)lc;
	384	rl = (long*)rc;
	385
	386	switch (optype) {
	387	case OP_BIT_AND:
	388	while (len--) {
	389	dl++ = ll++ & *rl++;
	390	dl++ = ll++ & *rl++;
	391	dl++ = ll++ & *rl++;
	392	dl++ = ll++ & *rl++;
	393	}
	394	break;
a0d0e21e	395	case OP_BIT_XOR:
79072805 LW	396	while (len--) {
	397	dl++ = ll++ ^ *rl++;
	398	dl++ = ll++ ^ *rl++;
	399	dl++ = ll++ ^ *rl++;
	400	dl++ = ll++ ^ *rl++;
	401	}
	402	break;
	403	case OP_BIT_OR:
	404	while (len--) {
	405	dl++ = ll++ \| *rl++;
	406	dl++ = ll++ \| *rl++;
	407	dl++ = ll++ \| *rl++;
	408	dl++ = ll++ \| *rl++;
	409	}
	410	}
	411
	412	dc = (char*)dl;
	413	lc = (char*)ll;
	414	rc = (char*)rl;
	415
	416	len = remainder;
	417	}
	418	#endif
a0d0e21e	419	{
a0d0e21e LW	420	switch (optype) {
	421	case OP_BIT_AND:
	422	while (len--)
	423	dc++ = lc++ & *rc++;
	424	break;
	425	case OP_BIT_XOR:
	426	while (len--)
	427	dc++ = lc++ ^ *rc++;
	428	goto mop_up;
	429	case OP_BIT_OR:
	430	while (len--)
	431	dc++ = lc++ \| *rc++;
	432	mop_up:
	433	len = lensave;
	434	if (rightlen > len)
	435	sv_catpvn(sv, rsave + len, rightlen - len);
	436	else if (leftlen > len)
	437	sv_catpvn(sv, lsave + len, leftlen - len);
4633a7c4 LW	438	else
4633a7c4 LW	439	*SvEND(sv) = '\0';
a0d0e21e LW	440	break;
a0d0e21e LW	441	}
79072805 LW	442	}
79072805 LW	443	}
463ee0b2 LW	444
	445	OP *
	446	do_kv(ARGS)
	447	dARGS
	448	{
	449	dSP;
	450	HV hv = (HV)POPs;
463ee0b2	451	register HE *entry;
463ee0b2	452	SV *tmpstr;
54310121	453	I32 gimme = GIMME_V;
a0d0e21e LW	454	I32 dokeys = (op->op_type == OP_KEYS);
	455	I32 dovalues = (op->op_type == OP_VALUES);
	456
	457	if (op->op_type == OP_RV2HV \|\| op->op_type == OP_PADHV)
	458	dokeys = dovalues = TRUE;
463ee0b2	459
85581909 SB	460	if (!hv) {
	461	if (op->op_flags & OPf_MOD) { /* lvalue */
	462	dTARGET; /* make sure to clear its target here */
	463	if (SvTYPE(TARG) == SVt_PVLV)
	464	LvTARG(TARG) = Nullsv;
	465	PUSHs(TARG);
	466	}
463ee0b2	467	RETURN;
85581909	468	}
748a9306 LW	469
	470	(void)hv_iterinit(hv); /* always reset iterator regardless */
	471
54310121	472	if (gimme == G_VOID)
aa689395	473	RETURN;
aa689395	474
54310121	475	if (gimme == G_SCALAR) {
8c2cee6f	476	I32 i;
463ee0b2 LW	477	dTARGET;
463ee0b2 LW	478
85581909 SB	479	if (op->op_flags & OPf_MOD) { /* lvalue */
	480	if (SvTYPE(TARG) < SVt_PVLV) {
	481	sv_upgrade(TARG, SVt_PVLV);
	482	sv_magic(TARG, Nullsv, 'k', Nullch, 0);
	483	}
	484	LvTYPE(TARG) = 'k';
	485	LvTARG(TARG) = (SV*)hv;
	486	PUSHs(TARG);
	487	RETURN;
	488	}
	489
8990e307	490	if (!SvRMAGICAL(hv) \|\| !mg_find((SV*)hv,'P'))
463ee0b2 LW	491	i = HvKEYS(hv);
	492	else {
	493	i = 0;
463ee0b2 LW	494	/SUPPRESS 560/
	495	while (entry = hv_iternext(hv)) {
	496	i++;
	497	}
	498	}
	499	PUSHi( i );
	500	RETURN;
	501	}
	502
	503	/* Guess how much room we need. hv_max may be a few too many. Oh well. */
	504	EXTEND(sp, HvMAX(hv) * (dokeys + dovalues));
	505
463ee0b2 LW	506	PUTBACK; /* hv_iternext and hv_iterval might clobber stack_sp */
	507	while (entry = hv_iternext(hv)) {
	508	SPAGAIN;
8c2cee6f	509	if (dokeys)
8c2cee6f	510	XPUSHs(hv_iterkeysv(entry)); /* won't clobber stack_sp */
463ee0b2	511	if (dovalues) {
46fc3d4c	512	tmpstr = sv_newmortal();
463ee0b2 LW	513	PUTBACK;
463ee0b2 LW	514	sv_setsv(tmpstr,hv_iterval(hv,entry));
46fc3d4c	515	DEBUG_H(sv_setpvf(tmpstr, "%lu%%%d=%lu",
	516	(unsigned long)HeHASH(entry),
	517	HvMAX(hv)+1,
	518	(unsigned long)(HeHASH(entry) & HvMAX(hv))));
463ee0b2	519	SPAGAIN;
46fc3d4c	520	XPUSHs(tmpstr);
463ee0b2 LW	521	}
	522	PUTBACK;
	523	}
	524	return NORMAL;
	525	}
	526