[perl5.git] / mg.c

/* $RCSfile: hash.c,v $$Revision: 4.1 $$Date: 92/08/07 18:21:48 $
 *
 *    Copyright (c) 1993, 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.
 *
 * $Log:        hash.c,v $
 */

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

int
mg_get(sv)
SV* sv;
{
    MAGIC* mg;
    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	MGVTBL* vtbl = mg->mg_virtual;
	if (vtbl && vtbl->svt_get)
	    (*vtbl->svt_get)(sv, mg);
    }
    return 0;
}

int
mg_set(sv)
SV* sv;
{
    MAGIC* mg;
    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	MGVTBL* vtbl = mg->mg_virtual;
	if (vtbl && vtbl->svt_set)
	    (*vtbl->svt_set)(sv, mg);
    }
    return 0;
}

U32
mg_len(sv)
SV* sv;
{
    MAGIC* mg;
    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	MGVTBL* vtbl = mg->mg_virtual;
	if (vtbl && vtbl->svt_len)
	    return (*vtbl->svt_len)(sv, mg);
    }
    if (!SvPOK(sv) && SvNIOK(sv))
	sv_2pv(sv);
    if (SvPOK(sv))
	return SvCUR(sv);
    return 0;
}

int
mg_clear(sv)
SV* sv;
{
    MAGIC* mg;
    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	MGVTBL* vtbl = mg->mg_virtual;
	if (vtbl && vtbl->svt_clear)
	    (*vtbl->svt_clear)(sv, mg);
    }
    return 0;
}

int
mg_free(sv, type)
SV* sv;
char type;
{
    MAGIC* mg;
    MAGIC** mgp = &SvMAGIC(sv);
    for (mg = *mgp; mg; mg = *mgp) {
	if (mg->mg_type == type) {
	    MGVTBL* vtbl = mg->mg_virtual;
	    *mgp = mg->mg_moremagic;
	    if (vtbl && vtbl->svt_free)
		(*vtbl->svt_free)(sv, mg);
	    if (mg->mg_ptr)
		Safefree(mg->mg_ptr);
	    Safefree(mg);
	}
	else
	    mgp = &mg->mg_moremagic;
    }
    return 0;
}

int
mg_freeall(sv)
SV* sv;
{
    MAGIC* mg;
    MAGIC* moremagic;
    for (mg = SvMAGIC(sv); mg; mg = moremagic) {
	MGVTBL* vtbl = mg->mg_virtual;
	moremagic = mg->mg_moremagic;
	if (vtbl && vtbl->svt_free)
	    (*vtbl->svt_free)(sv, mg);
	if (mg->mg_ptr)
	    Safefree(mg->mg_ptr);
	Safefree(mg);
    }
    SvMAGIC(sv) = 0;
    return 0;
}

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

#ifdef VOIDSIG
#define handlertype void
#else
#define handlertype int
#endif

static handlertype sighandler();

int
magic_get(sv, mg)
SV *sv;
MAGIC *mg;
{
    register I32 paren;
    register char *s;
    register I32 i;

    switch (*mg->mg_ptr) {
    case '\004':		/* ^D */
	sv_setiv(sv,(I32)(debug & 32767));
	break;
    case '\006':		/* ^F */
	sv_setiv(sv,(I32)maxsysfd);
	break;
    case '\t':			/* ^I */
	if (inplace)
	    sv_setpv(sv, inplace);
	else
	    sv_setsv(sv,&sv_undef);
	break;
    case '\020':		/* ^P */
	sv_setiv(sv,(I32)perldb);
	break;
    case '\024':		/* ^T */
	sv_setiv(sv,(I32)basetime);
	break;
    case '\027':		/* ^W */
	sv_setiv(sv,(I32)dowarn);
	break;
    case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8': case '9': case '&':
	if (curpm) {
	    paren = atoi(GvENAME(mg->mg_obj));
	  getparen:
	    if (curpm->op_pmregexp &&
	      paren <= curpm->op_pmregexp->nparens &&
	      (s = curpm->op_pmregexp->startp[paren]) ) {
		i = curpm->op_pmregexp->endp[paren] - s;
		if (i >= 0)
		    sv_setpvn(sv,s,i);
		else
		    sv_setsv(sv,&sv_undef);
	    }
	    else
		sv_setsv(sv,&sv_undef);
	}
	break;
    case '+':
	if (curpm) {
	    paren = curpm->op_pmregexp->lastparen;
	    goto getparen;
	}
	break;
    case '`':
	if (curpm) {
	    if (curpm->op_pmregexp &&
	      (s = curpm->op_pmregexp->subbeg) ) {
		i = curpm->op_pmregexp->startp[0] - s;
		if (i >= 0)
		    sv_setpvn(sv,s,i);
		else
		    sv_setpvn(sv,"",0);
	    }
	    else
		sv_setpvn(sv,"",0);
	}
	break;
    case '\'':
	if (curpm) {
	    if (curpm->op_pmregexp &&
	      (s = curpm->op_pmregexp->endp[0]) ) {
		sv_setpvn(sv,s, curpm->op_pmregexp->subend - s);
	    }
	    else
		sv_setpvn(sv,"",0);
	}
	break;
    case '.':
#ifndef lint
	if (last_in_gv && GvIO(last_in_gv)) {
	    sv_setiv(sv,(I32)GvIO(last_in_gv)->lines);
	}
#endif
	break;
    case '?':
	sv_setiv(sv,(I32)statusvalue);
	break;
    case '^':
	s = GvIO(defoutgv)->top_name;
	if (s)
	    sv_setpv(sv,s);
	else {
	    sv_setpv(sv,GvENAME(defoutgv));
	    sv_catpv(sv,"_TOP");
	}
	break;
    case '~':
	s = GvIO(defoutgv)->fmt_name;
	if (!s)
	    s = GvENAME(defoutgv);
	sv_setpv(sv,s);
	break;
#ifndef lint
    case '=':
	sv_setiv(sv,(I32)GvIO(defoutgv)->page_len);
	break;
    case '-':
	sv_setiv(sv,(I32)GvIO(defoutgv)->lines_left);
	break;
    case '%':
	sv_setiv(sv,(I32)GvIO(defoutgv)->page);
	break;
#endif
    case ':':
	break;
    case '/':
	break;
    case '[':
	sv_setiv(sv,(I32)arybase);
	break;
    case '|':
	if (!GvIO(defoutgv))
	    GvIO(defoutgv) = newIO();
	sv_setiv(sv, (GvIO(defoutgv)->flags & IOf_FLUSH) != 0 );
	break;
    case ',':
	sv_setpvn(sv,ofs,ofslen);
	break;
    case '\\':
	sv_setpvn(sv,ors,orslen);
	break;
    case '#':
	sv_setpv(sv,ofmt);
	break;
    case '!':
	sv_setnv(sv,(double)errno);
	sv_setpv(sv, errno ? strerror(errno) : "");
	SvNOK_on(sv);	/* what a wonderful hack! */
	break;
    case '<':
	sv_setiv(sv,(I32)uid);
	break;
    case '>':
	sv_setiv(sv,(I32)euid);
	break;
    case '(':
	s = buf;
	(void)sprintf(s,"%d",(int)gid);
	goto add_groups;
    case ')':
	s = buf;
	(void)sprintf(s,"%d",(int)egid);
      add_groups:
	while (*s) s++;
#ifdef HAS_GETGROUPS
#ifndef NGROUPS
#define NGROUPS 32
#endif
	{
	    GROUPSTYPE gary[NGROUPS];

	    i = getgroups(NGROUPS,gary);
	    while (--i >= 0) {
		(void)sprintf(s," %ld", (long)gary[i]);
		while (*s) s++;
	    }
	}
#endif
	sv_setpv(sv,buf);
	break;
    case '*':
	break;
    case '0':
	break;
    }
}

int
magic_getuvar(sv, mg)
SV *sv;
MAGIC *mg;
{
    struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;

    if (uf && uf->uf_val)
	(*uf->uf_val)(uf->uf_index, sv);
    return 0;
}

int
magic_setenv(sv,mg)
SV* sv;
MAGIC* mg;
{
    register char *s;
    I32 i;
    s = SvPV(sv);
    my_setenv(mg->mg_ptr,s);
			    /* And you'll never guess what the dog had */
			    /*   in its mouth... */
#ifdef TAINT
    if (s && strEQ(mg->mg_ptr,"PATH")) {
	char *strend = SvEND(sv);

	while (s < strend) {
	    s = cpytill(tokenbuf,s,strend,':',&i);
	    s++;
	    if (*tokenbuf != '/'
	      || (stat(tokenbuf,&statbuf) && (statbuf.st_mode & 2)) )
		sv->sv_tainted = 2;
	}
    }
#endif
    return 0;
}

int
magic_setsig(sv,mg)
SV* sv;
MAGIC* mg;
{
    register char *s;
    I32 i;
    s = SvPV(sv);
    i = whichsig(mg->mg_ptr);	/* ...no, a brick */
    if (!i && (dowarn || strEQ(mg->mg_ptr,"ALARM")))
	warn("No such signal: SIG%s", mg->mg_ptr);
    if (strEQ(s,"IGNORE"))
#ifndef lint
	(void)signal(i,SIG_IGN);
#else
	;
#endif
    else if (strEQ(s,"DEFAULT") || !*s)
	(void)signal(i,SIG_DFL);
    else {
	(void)signal(i,sighandler);
	if (!index(s,'\'')) {
	    sprintf(tokenbuf, "main'%s",s);
	    sv_setpv(sv,tokenbuf);
	}
    }
    return 0;
}

int
magic_setdbm(sv,mg)
SV* sv;
MAGIC* mg;
{
    HV* hv = (HV*)mg->mg_obj;
    hv_dbmstore(hv,mg->mg_ptr,mg->mg_len,sv);	/* XXX slurp? */
    return 0;
}

int
magic_setdbline(sv,mg)
SV* sv;
MAGIC* mg;
{
    OP *o;
    I32 i;
    GV* gv;
    SV** svp;

    gv = DBline;
    i = SvTRUE(sv);
    svp = av_fetch(GvAV(gv),atoi(mg->mg_ptr), FALSE);
    if (svp && SvMAGICAL(*svp) && (o = (OP*)SvMAGIC(*svp)->mg_ptr)) {
#ifdef NOTDEF
	cmd->cop_flags &= ~COPf_OPTIMIZE;
	cmd->cop_flags |= i? COPo_D1 : COPo_D0;
#endif
    }
    else
	warn("Can't break at that line\n");
    return 0;
}

int
magic_getarylen(sv,mg)
SV* sv;
MAGIC* mg;
{
    sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + arybase);
    return 0;
}

int
magic_setarylen(sv,mg)
SV* sv;
MAGIC* mg;
{
    av_fill((AV*)mg->mg_obj, (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) - arybase);
    return 0;
}

int
magic_getglob(sv,mg)
SV* sv;
MAGIC* mg;
{
    gv_efullname(sv,((GV*)sv));/* a gv value, be nice */
    return 0;
}

int
magic_setglob(sv,mg)
SV* sv;
MAGIC* mg;
{
    register char *s;
    GV* gv;

    if (!SvOK(sv))
	return 0;
    s = SvPOK(sv) ? SvPV(sv) : sv_2pv(sv);
    if (*s == '*' && s[1])
	s++;
    gv = gv_fetchpv(s,TRUE);
    if (sv == (SV*)gv)
	return 0;
    if (GvGP(sv))
	gp_free(sv);
    GvGP(sv) = gp_ref(GvGP(gv));
    if (!GvAV(gv))
	gv_AVadd(gv);
    if (!GvHV(gv))
	gv_HVadd(gv);
    if (!GvIO(gv))
	GvIO(gv) = newIO();
    return 0;
}

int
magic_setsubstr(sv,mg)
SV* sv;
MAGIC* mg;
{
    char *tmps = SvPV(sv);
    if (!tmps)
	tmps = "";
    sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps,SvCUR(sv));
    return 0;
}

int
magic_setvec(sv,mg)
SV* sv;
MAGIC* mg;
{
    do_vecset(sv);	/* XXX slurp this routine */
    return 0;
}

int
magic_setbm(sv,mg)
SV* sv;
MAGIC* mg;
{
    mg_free(sv, 'B');
    SvVALID_off(sv);
    return 0;
}

int
magic_setuvar(sv,mg)
SV* sv;
MAGIC* mg;
{
    struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;

    if (uf && uf->uf_set)
	(*uf->uf_set)(uf->uf_index, sv);
    return 0;
}

int
magic_set(sv,mg)
SV* sv;
MAGIC* mg;
{
    register char *s;
    I32 i;
    switch (*mg->mg_ptr) {
    case '\004':	/* ^D */
	debug = (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) | 32768;
	DEBUG_x(dump_all());
	break;
    case '\006':	/* ^F */
	maxsysfd = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	break;
    case '\t':	/* ^I */
	if (inplace)
	    Safefree(inplace);
	if (SvOK(sv))
	    inplace = savestr(SvPV(sv));
	else
	    inplace = Nullch;
	break;
    case '\020':	/* ^P */
	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	if (i != perldb) {
	    if (perldb)
		oldlastpm = curpm;
	    else
		curpm = oldlastpm;
	}
	perldb = i;
	break;
    case '\024':	/* ^T */
	basetime = (time_t)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	break;
    case '\027':	/* ^W */
	dowarn = (bool)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	break;
    case '.':
	if (localizing)
	    save_sptr((SV**)&last_in_gv);
	break;
    case '^':
	Safefree(GvIO(defoutgv)->top_name);
	GvIO(defoutgv)->top_name = s = savestr(SvPV(sv));
	GvIO(defoutgv)->top_gv = gv_fetchpv(s,TRUE);
	break;
    case '~':
	Safefree(GvIO(defoutgv)->fmt_name);
	GvIO(defoutgv)->fmt_name = s = savestr(SvPV(sv));
	GvIO(defoutgv)->fmt_gv = gv_fetchpv(s,TRUE);
	break;
    case '=':
	GvIO(defoutgv)->page_len = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	break;
    case '-':
	GvIO(defoutgv)->lines_left = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	if (GvIO(defoutgv)->lines_left < 0L)
	    GvIO(defoutgv)->lines_left = 0L;
	break;
    case '%':
	GvIO(defoutgv)->page = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	break;
    case '|':
	if (!GvIO(defoutgv))
	    GvIO(defoutgv) = newIO();
	GvIO(defoutgv)->flags &= ~IOf_FLUSH;
	if ((SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) != 0) {
	    GvIO(defoutgv)->flags |= IOf_FLUSH;
	}
	break;
    case '*':
	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	multiline = (i != 0);
	break;
    case '/':
	if (SvPOK(sv)) {
	    rs = SvPV(sv);
	    rslen = SvCUR(sv);
	    if (rspara = !rslen) {
		rs = "\n\n";
		rslen = 2;
	    }
	    rschar = rs[rslen - 1];
	}
	else {
	    rschar = 0777;	/* fake a non-existent char */
	    rslen = 1;
	}
	break;
    case '\\':
	if (ors)
	    Safefree(ors);
	ors = savestr(SvPV(sv));
	orslen = SvCUR(sv);
	break;
    case ',':
	if (ofs)
	    Safefree(ofs);
	ofs = savestr(SvPV(sv));
	ofslen = SvCUR(sv);
	break;
    case '#':
	if (ofmt)
	    Safefree(ofmt);
	ofmt = savestr(SvPV(sv));
	break;
    case '[':
	arybase = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	break;
    case '?':
	statusvalue = U_S(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
	break;
    case '!':
	errno = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);		/* will anyone ever use this? */
	break;
    case '<':
	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	if (delaymagic) {
	    delaymagic |= DM_RUID;
	    break;				/* don't do magic till later */
	}
#ifdef HAS_SETRUID
	(void)setruid((UIDTYPE)uid);
#else
#ifdef HAS_SETREUID
	(void)setreuid((UIDTYPE)uid, (UIDTYPE)-1);
#else
	if (uid == euid)		/* special case $< = $> */
	    (void)setuid(uid);
	else
	    fatal("setruid() not implemented");
#endif
#endif
	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	break;
    case '>':
	euid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	if (delaymagic) {
	    delaymagic |= DM_EUID;
	    break;				/* don't do magic till later */
	}
#ifdef HAS_SETEUID
	(void)seteuid((UIDTYPE)euid);
#else
#ifdef HAS_SETREUID
	(void)setreuid((UIDTYPE)-1, (UIDTYPE)euid);
#else
	if (euid == uid)		/* special case $> = $< */
	    setuid(euid);
	else
	    fatal("seteuid() not implemented");
#endif
#endif
	euid = (I32)geteuid();
	break;
    case '(':
	gid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	if (delaymagic) {
	    delaymagic |= DM_RGID;
	    break;				/* don't do magic till later */
	}
#ifdef HAS_SETRGID
	(void)setrgid((GIDTYPE)gid);
#else
#ifdef HAS_SETREGID
	(void)setregid((GIDTYPE)gid, (GIDTYPE)-1);
#else
	if (gid == egid)			/* special case $( = $) */
	    (void)setgid(gid);
	else
	    fatal("setrgid() not implemented");
#endif
#endif
	gid = (I32)getgid();
	break;
    case ')':
	egid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
	if (delaymagic) {
	    delaymagic |= DM_EGID;
	    break;				/* don't do magic till later */
	}
#ifdef HAS_SETEGID
	(void)setegid((GIDTYPE)egid);
#else
#ifdef HAS_SETREGID
	(void)setregid((GIDTYPE)-1, (GIDTYPE)egid);
#else
	if (egid == gid)			/* special case $) = $( */
	    (void)setgid(egid);
	else
	    fatal("setegid() not implemented");
#endif
#endif
	egid = (I32)getegid();
	break;
    case ':':
	chopset = SvPV(sv);
	break;
    case '0':
	if (!origalen) {
	    s = origargv[0];
	    s += strlen(s);
	    /* See if all the arguments are contiguous in memory */
	    for (i = 1; i < origargc; i++) {
		if (origargv[i] == s + 1)
		    s += strlen(++s);	/* this one is ok too */
	    }
	    if (origenviron[0] == s + 1) {	/* can grab env area too? */
		my_setenv("NoNeSuCh", Nullch);
					    /* force copy of environment */
		for (i = 0; origenviron[i]; i++)
		    if (origenviron[i] == s + 1)
			s += strlen(++s);
	    }
	    origalen = s - origargv[0];
	}
	s = SvPV(sv);
	i = SvCUR(sv);
	if (i >= origalen) {
	    i = origalen;
	    SvCUR_set(sv, i);
	    *SvEND(sv) = '\0';
	    Copy(s, origargv[0], i, char);
	}
	else {
	    Copy(s, origargv[0], i, char);
	    s = origargv[0]+i;
	    *s++ = '\0';
	    while (++i < origalen)
		*s++ = ' ';
	}
	break;
    }
    return 0;
}

I32
whichsig(sig)
char *sig;
{
    register char **sigv;

    for (sigv = sig_name+1; *sigv; sigv++)
	if (strEQ(sig,*sigv))
	    return sigv - sig_name;
#ifdef SIGCLD
    if (strEQ(sig,"CHLD"))
	return SIGCLD;
#endif
#ifdef SIGCHLD
    if (strEQ(sig,"CLD"))
	return SIGCHLD;
#endif
    return 0;
}

static handlertype
sighandler(sig)
I32 sig;
{
    dSP;
    GV *gv;
    SV *sv;
    CV *cv;
    CONTEXT *cx;
    AV *oldstack;
    I32 hasargs = 1;
    I32 items = 1;
    I32 gimme = G_SCALAR;

#ifdef OS2		/* or anybody else who requires SIG_ACK */
    signal(sig, SIG_ACK);
#endif

    gv = gv_fetchpv(
	SvPVnx(*hv_fetch(GvHVn(siggv),sig_name[sig],strlen(sig_name[sig]),
	  TRUE)), TRUE);
    cv = GvCV(gv);
    if (!cv && *sig_name[sig] == 'C' && instr(sig_name[sig],"LD")) {
	if (sig_name[sig][1] == 'H')
	    gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CLD",3,TRUE)),
	      TRUE);
	else
	    gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CHLD",4,TRUE)),
	      TRUE);
	cv = GvCV(gv);	/* gag */
    }
    if (!cv) {
	if (dowarn)
	    warn("SIG%s handler \"%s\" not defined.\n",
		sig_name[sig], GvENAME(gv) );
	return;
    }

    oldstack = stack;
    SWITCHSTACK(stack, signalstack);

    sv = sv_mortalcopy(&sv_undef);
    sv_setpv(sv,sig_name[sig]);
    PUSHs(sv);

    ENTER;
    SAVETMPS;

    push_return(op);
    push_return(0);
    PUSHBLOCK(cx, CXt_SUB, sp);
    PUSHSUB(cx);
    cx->blk_sub.savearray = GvAV(defgv);
    cx->blk_sub.argarray = av_fake(items, sp);
    GvAV(defgv) = cx->blk_sub.argarray;
    CvDEPTH(cv)++;
    if (CvDEPTH(cv) >= 2) {
	if (CvDEPTH(cv) == 100 && dowarn)
	    warn("Deep recursion on subroutine \"%s\"",GvENAME(gv));
    }
    op = CvSTART(cv);
    PUTBACK;
    run();		/* Does the LEAVE for us. */

    SWITCHSTACK(signalstack, oldstack);
    op = pop_return();

    return;
}

#ifdef OLD
    if (sv->sv_magic && !sv->sv_rare) {
	GV *gv = sv->sv_magic->sv_u.sv_gv;

	switch (*SvPV(gv->sv_magic)) {
	case '1': case '2': case '3': case '4':
	case '5': case '6': case '7': case '8': case '9': case '&':
	    if (curpm) {
		paren = atoi(GvENAME(gv));
	      getparen:
		if (curpm->op_pmregexp &&
		  paren <= curpm->op_pmregexp->nparens &&
		  (s = curpm->op_pmregexp->startp[paren]) ) {
		    i = curpm->op_pmregexp->endp[paren] - s;
		    if (i >= 0)
			return i;
		    else
			return 0;
		}
		else
		    return 0;
	    }
	    break;
	case '+':
	    if (curpm) {
		paren = curpm->op_pmregexp->lastparen;
		goto getparen;
	    }
	    break;
	case '`':
	    if (curpm) {
		if (curpm->op_pmregexp &&
		  (s = curpm->op_pmregexp->subbeg) ) {
		    i = curpm->op_pmregexp->startp[0] - s;
		    if (i >= 0)
			return i;
		    else
			return 0;
		}
		else
		    return 0;
	    }
	    break;
	case '\'':
	    if (curpm) {
		if (curpm->op_pmregexp &&
		  (s = curpm->op_pmregexp->endp[0]) ) {
		    return (STRLEN) (curpm->op_pmregexp->subend - s);
		}
		else
		    return 0;
	    }
	    break;
	case ',':
	    return (STRLEN)ofslen;
	case '\\':
	    return (STRLEN)orslen;
	}
	sv = gv_str(sv);
    }
#endif
Commit	Line	Data
79072805 LW	1	/* $RCSfile: hash.c,v $$Revision: 4.1 $$Date: 92/08/07 18:21:48 $
	2	*
	3	* Copyright (c) 1993, Larry Wall
	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	*
	8	* $Log: hash.c,v $
	9	*/
	10
	11	#include "EXTERN.h"
	12	#include "perl.h"
	13
	14	int
	15	mg_get(sv)
	16	SV* sv;
	17	{
	18	MAGIC* mg;
	19	for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	20	MGVTBL* vtbl = mg->mg_virtual;
	21	if (vtbl && vtbl->svt_get)
	22	(*vtbl->svt_get)(sv, mg);
	23	}
	24	return 0;
	25	}
	26
	27	int
	28	mg_set(sv)
	29	SV* sv;
	30	{
	31	MAGIC* mg;
	32	for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	33	MGVTBL* vtbl = mg->mg_virtual;
	34	if (vtbl && vtbl->svt_set)
	35	(*vtbl->svt_set)(sv, mg);
	36	}
	37	return 0;
	38	}
	39
	40	U32
	41	mg_len(sv)
	42	SV* sv;
	43	{
	44	MAGIC* mg;
	45	for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	46	MGVTBL* vtbl = mg->mg_virtual;
	47	if (vtbl && vtbl->svt_len)
	48	return (*vtbl->svt_len)(sv, mg);
	49	}
	50	if (!SvPOK(sv) && SvNIOK(sv))
	51	sv_2pv(sv);
	52	if (SvPOK(sv))
	53	return SvCUR(sv);
	54	return 0;
	55	}
	56
	57	int
	58	mg_clear(sv)
	59	SV* sv;
	60	{
	61	MAGIC* mg;
	62	for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
	63	MGVTBL* vtbl = mg->mg_virtual;
	64	if (vtbl && vtbl->svt_clear)
65	(*vtbl->svt_clear)(sv, mg);
66	}
67	return 0;
68	}
69
70	int
71	mg_free(sv, type)
72	SV* sv;
73	char type;
74	{
75	MAGIC* mg;
76	MAGIC** mgp = &SvMAGIC(sv);
77	for (mg = mgp; mg; mg = mgp) {
78	if (mg->mg_type == type) {
79	MGVTBL* vtbl = mg->mg_virtual;
80	*mgp = mg->mg_moremagic;
81	if (vtbl && vtbl->svt_free)
82	(*vtbl->svt_free)(sv, mg);
83	if (mg->mg_ptr)
84	Safefree(mg->mg_ptr);
85	Safefree(mg);
86	}
87	else
88	mgp = &mg->mg_moremagic;
89	}
90	return 0;
91	}
92
93	int
94	mg_freeall(sv)
95	SV* sv;
96	{
97	MAGIC* mg;
98	MAGIC* moremagic;
99	for (mg = SvMAGIC(sv); mg; mg = moremagic) {
100	MGVTBL* vtbl = mg->mg_virtual;
101	moremagic = mg->mg_moremagic;
102	if (vtbl && vtbl->svt_free)
103	(*vtbl->svt_free)(sv, mg);
104	if (mg->mg_ptr)
105	Safefree(mg->mg_ptr);
106	Safefree(mg);
107	}
108	SvMAGIC(sv) = 0;
109	return 0;
110	}
111
112	#if !defined(NSIG) \|\| defined(M_UNIX) \|\| defined(M_XENIX)
113	#include <signal.h>
114	#endif
115
116	#ifdef VOIDSIG
117	#define handlertype void
118	#else
119	#define handlertype int
120	#endif
121
122	static handlertype sighandler();
123
124	int
125	magic_get(sv, mg)
126	SV *sv;
127	MAGIC *mg;
128	{
129	register I32 paren;
130	register char *s;
131	register I32 i;
132
133	switch (*mg->mg_ptr) {
134	case '\004': /* ^D */
135	sv_setiv(sv,(I32)(debug & 32767));
136	break;
137	case '\006': /* ^F */
138	sv_setiv(sv,(I32)maxsysfd);
139	break;
140	case '\t': /* ^I */
141	if (inplace)
142	sv_setpv(sv, inplace);
143	else
144	sv_setsv(sv,&sv_undef);
145	break;
146	case '\020': /* ^P */
147	sv_setiv(sv,(I32)perldb);
148	break;
149	case '\024': /* ^T */
150	sv_setiv(sv,(I32)basetime);
151	break;
152	case '\027': /* ^W */
153	sv_setiv(sv,(I32)dowarn);
154	break;
155	case '1': case '2': case '3': case '4':
156	case '5': case '6': case '7': case '8': case '9': case '&':
157	if (curpm) {
158	paren = atoi(GvENAME(mg->mg_obj));
159	getparen:
160	if (curpm->op_pmregexp &&
161	paren <= curpm->op_pmregexp->nparens &&
162	(s = curpm->op_pmregexp->startp[paren]) ) {
163	i = curpm->op_pmregexp->endp[paren] - s;
164	if (i >= 0)
165	sv_setpvn(sv,s,i);
166	else
167	sv_setsv(sv,&sv_undef);
168	}
169	else
170	sv_setsv(sv,&sv_undef);
171	}
172	break;
173	case '+':
174	if (curpm) {
175	paren = curpm->op_pmregexp->lastparen;
176	goto getparen;
177	}
178	break;
179	case '`':
180	if (curpm) {
181	if (curpm->op_pmregexp &&
182	(s = curpm->op_pmregexp->subbeg) ) {
183	i = curpm->op_pmregexp->startp[0] - s;
184	if (i >= 0)
185	sv_setpvn(sv,s,i);
186	else
187	sv_setpvn(sv,"",0);
188	}
189	else
190	sv_setpvn(sv,"",0);
191	}
192	break;
193	case '\'':
194	if (curpm) {
195	if (curpm->op_pmregexp &&
196	(s = curpm->op_pmregexp->endp[0]) ) {
197	sv_setpvn(sv,s, curpm->op_pmregexp->subend - s);
198	}
199	else
200	sv_setpvn(sv,"",0);
201	}
202	break;
203	case '.':
204	#ifndef lint
205	if (last_in_gv && GvIO(last_in_gv)) {
206	sv_setiv(sv,(I32)GvIO(last_in_gv)->lines);
207	}
208	#endif
209	break;
210	case '?':
211	sv_setiv(sv,(I32)statusvalue);
212	break;
213	case '^':
214	s = GvIO(defoutgv)->top_name;
215	if (s)
216	sv_setpv(sv,s);
217	else {
218	sv_setpv(sv,GvENAME(defoutgv));
219	sv_catpv(sv,"_TOP");
220	}
221	break;
222	case '~':
223	s = GvIO(defoutgv)->fmt_name;
224	if (!s)
225	s = GvENAME(defoutgv);
226	sv_setpv(sv,s);
227	break;
228	#ifndef lint
229	case '=':
230	sv_setiv(sv,(I32)GvIO(defoutgv)->page_len);
231	break;
232	case '-':
233	sv_setiv(sv,(I32)GvIO(defoutgv)->lines_left);
234	break;
235	case '%':
236	sv_setiv(sv,(I32)GvIO(defoutgv)->page);
237	break;
238	#endif
239	case ':':
240	break;
241	case '/':
242	break;
243	case '[':
244	sv_setiv(sv,(I32)arybase);
245	break;
246	case '\|':
247	if (!GvIO(defoutgv))
248	GvIO(defoutgv) = newIO();
249	sv_setiv(sv, (GvIO(defoutgv)->flags & IOf_FLUSH) != 0 );
250	break;
251	case ',':
252	sv_setpvn(sv,ofs,ofslen);
253	break;
254	case '\\':
255	sv_setpvn(sv,ors,orslen);
256	break;
257	case '#':
258	sv_setpv(sv,ofmt);
259	break;
260	case '!':
261	sv_setnv(sv,(double)errno);
262	sv_setpv(sv, errno ? strerror(errno) : "");
263	SvNOK_on(sv); /* what a wonderful hack! */
264	break;
265	case '<':
266	sv_setiv(sv,(I32)uid);
267	break;
268	case '>':
269	sv_setiv(sv,(I32)euid);
270	break;
271	case '(':
272	s = buf;
273	(void)sprintf(s,"%d",(int)gid);
274	goto add_groups;
275	case ')':
276	s = buf;
277	(void)sprintf(s,"%d",(int)egid);
278	add_groups:
279	while (*s) s++;
280	#ifdef HAS_GETGROUPS
281	#ifndef NGROUPS
282	#define NGROUPS 32
283	#endif
284	{
285	GROUPSTYPE gary[NGROUPS];
286
287	i = getgroups(NGROUPS,gary);
288	while (--i >= 0) {
289	(void)sprintf(s," %ld", (long)gary[i]);
290	while (*s) s++;
291	}
292	}
293	#endif
294	sv_setpv(sv,buf);
295	break;
296	case '*':
297	break;
298	case '0':
299	break;
300	}
301	}
302
303	int
304	magic_getuvar(sv, mg)
305	SV *sv;
306	MAGIC *mg;
307	{
308	struct ufuncs uf = (struct ufuncs )mg->mg_ptr;
309
310	if (uf && uf->uf_val)
311	(*uf->uf_val)(uf->uf_index, sv);
312	return 0;
313	}
314
315	int
316	magic_setenv(sv,mg)
317	SV* sv;
318	MAGIC* mg;
319	{
320	register char *s;
321	I32 i;
322	s = SvPV(sv);
323	my_setenv(mg->mg_ptr,s);
324	/* And you'll never guess what the dog had */
325	/* in its mouth... */
326	#ifdef TAINT
327	if (s && strEQ(mg->mg_ptr,"PATH")) {
328	char *strend = SvEND(sv);
329
330	while (s < strend) {
331	s = cpytill(tokenbuf,s,strend,':',&i);
332	s++;
333	if (*tokenbuf != '/'
334	\|\| (stat(tokenbuf,&statbuf) && (statbuf.st_mode & 2)) )
335	sv->sv_tainted = 2;
336	}
337	}
338	#endif
339	return 0;
340	}
341
342	int
343	magic_setsig(sv,mg)
344	SV* sv;
345	MAGIC* mg;
346	{
347	register char *s;
348	I32 i;
349	s = SvPV(sv);
350	i = whichsig(mg->mg_ptr); /* ...no, a brick */
351	if (!i && (dowarn \|\| strEQ(mg->mg_ptr,"ALARM")))
352	warn("No such signal: SIG%s", mg->mg_ptr);
353	if (strEQ(s,"IGNORE"))
354	#ifndef lint
355	(void)signal(i,SIG_IGN);
356	#else
357	;
358	#endif
359	else if (strEQ(s,"DEFAULT") \|\| !*s)
360	(void)signal(i,SIG_DFL);
361	else {
362	(void)signal(i,sighandler);
363	if (!index(s,'\'')) {
364	sprintf(tokenbuf, "main'%s",s);
365	sv_setpv(sv,tokenbuf);
366	}
367	}
368	return 0;
369	}
370
371	int
372	magic_setdbm(sv,mg)
373	SV* sv;
374	MAGIC* mg;
375	{
376	HV* hv = (HV*)mg->mg_obj;
377	hv_dbmstore(hv,mg->mg_ptr,mg->mg_len,sv); /* XXX slurp? */
378	return 0;
379	}
380
381	int
382	magic_setdbline(sv,mg)
383	SV* sv;
384	MAGIC* mg;
385	{
386	OP *o;
387	I32 i;
388	GV* gv;
389	SV** svp;
390
391	gv = DBline;
392	i = SvTRUE(sv);
393	svp = av_fetch(GvAV(gv),atoi(mg->mg_ptr), FALSE);
394	if (svp && SvMAGICAL(svp) && (o = (OP)SvMAGIC(*svp)->mg_ptr)) {
395	#ifdef NOTDEF
396	cmd->cop_flags &= ~COPf_OPTIMIZE;
397	cmd->cop_flags \|= i? COPo_D1 : COPo_D0;
398	#endif
399	}
400	else
401	warn("Can't break at that line\n");
402	return 0;
403	}
404
405	int
406	magic_getarylen(sv,mg)
407	SV* sv;
408	MAGIC* mg;
409	{
410	sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + arybase);
411	return 0;
412	}
413
414	int
415	magic_setarylen(sv,mg)
416	SV* sv;
417	MAGIC* mg;
418	{
419	av_fill((AV*)mg->mg_obj, (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) - arybase);
420	return 0;
421	}
422
423	int
424	magic_getglob(sv,mg)
425	SV* sv;
426	MAGIC* mg;
427	{
428	gv_efullname(sv,((GV)sv));/ a gv value, be nice */
429	return 0;
430	}
431
432	int
433	magic_setglob(sv,mg)
434	SV* sv;
435	MAGIC* mg;
436	{
437	register char *s;
438	GV* gv;
439
440	if (!SvOK(sv))
441	return 0;
442	s = SvPOK(sv) ? SvPV(sv) : sv_2pv(sv);
443	if (s == '' && s[1])
444	s++;
445	gv = gv_fetchpv(s,TRUE);
446	if (sv == (SV*)gv)
447	return 0;
448	if (GvGP(sv))
449	gp_free(sv);
450	GvGP(sv) = gp_ref(GvGP(gv));
451	if (!GvAV(gv))
452	gv_AVadd(gv);
453	if (!GvHV(gv))
454	gv_HVadd(gv);
455	if (!GvIO(gv))
456	GvIO(gv) = newIO();
457	return 0;
458	}
459
460	int
461	magic_setsubstr(sv,mg)
462	SV* sv;
463	MAGIC* mg;
464	{
465	char *tmps = SvPV(sv);
466	if (!tmps)
467	tmps = "";
468	sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps,SvCUR(sv));
469	return 0;
470	}
471
472	int
473	magic_setvec(sv,mg)
474	SV* sv;
475	MAGIC* mg;
476	{
477	do_vecset(sv); /* XXX slurp this routine */
478	return 0;
479	}
480
481	int
482	magic_setbm(sv,mg)
483	SV* sv;
484	MAGIC* mg;
485	{
486	mg_free(sv, 'B');
487	SvVALID_off(sv);
488	return 0;
489	}
490
491	int
492	magic_setuvar(sv,mg)
493	SV* sv;
494	MAGIC* mg;
495	{
496	struct ufuncs uf = (struct ufuncs )mg->mg_ptr;
497
498	if (uf && uf->uf_set)
499	(*uf->uf_set)(uf->uf_index, sv);
500	return 0;
501	}
502
503	int
504	magic_set(sv,mg)
505	SV* sv;
506	MAGIC* mg;
507	{
508	register char *s;
509	I32 i;
510	switch (*mg->mg_ptr) {
511	case '\004': /* ^D */
512	debug = (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) \| 32768;
513	DEBUG_x(dump_all());
514	break;
515	case '\006': /* ^F */
516	maxsysfd = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
517	break;
518	case '\t': /* ^I */
519	if (inplace)
520	Safefree(inplace);
521	if (SvOK(sv))
522	inplace = savestr(SvPV(sv));
523	else
524	inplace = Nullch;
525	break;
526	case '\020': /* ^P */
527	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
528	if (i != perldb) {
529	if (perldb)
530	oldlastpm = curpm;
531	else
532	curpm = oldlastpm;
533	}
534	perldb = i;
535	break;
536	case '\024': /* ^T */
537	basetime = (time_t)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
538	break;
539	case '\027': /* ^W */
540	dowarn = (bool)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
541	break;
542	case '.':
543	if (localizing)
544	save_sptr((SV**)&last_in_gv);
545	break;
546	case '^':
547	Safefree(GvIO(defoutgv)->top_name);
548	GvIO(defoutgv)->top_name = s = savestr(SvPV(sv));
549	GvIO(defoutgv)->top_gv = gv_fetchpv(s,TRUE);
550	break;
551	case '~':
552	Safefree(GvIO(defoutgv)->fmt_name);
553	GvIO(defoutgv)->fmt_name = s = savestr(SvPV(sv));
554	GvIO(defoutgv)->fmt_gv = gv_fetchpv(s,TRUE);
555	break;
556	case '=':
557	GvIO(defoutgv)->page_len = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
558	break;
559	case '-':
560	GvIO(defoutgv)->lines_left = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
561	if (GvIO(defoutgv)->lines_left < 0L)
562	GvIO(defoutgv)->lines_left = 0L;
563	break;
564	case '%':
565	GvIO(defoutgv)->page = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
566	break;
567	case '\|':
568	if (!GvIO(defoutgv))
569	GvIO(defoutgv) = newIO();
570	GvIO(defoutgv)->flags &= ~IOf_FLUSH;
571	if ((SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) != 0) {
572	GvIO(defoutgv)->flags \|= IOf_FLUSH;
573	}
574	break;
575	case '*':
576	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
577	multiline = (i != 0);
578	break;
579	case '/':
580	if (SvPOK(sv)) {
581	rs = SvPV(sv);
582	rslen = SvCUR(sv);
583	if (rspara = !rslen) {
584	rs = "\n\n";
585	rslen = 2;
586	}
587	rschar = rs[rslen - 1];
588	}
589	else {
590	rschar = 0777; /* fake a non-existent char */
591	rslen = 1;
592	}
593	break;
594	case '\\':
595	if (ors)
596	Safefree(ors);
597	ors = savestr(SvPV(sv));
598	orslen = SvCUR(sv);
599	break;
600	case ',':
601	if (ofs)
602	Safefree(ofs);
603	ofs = savestr(SvPV(sv));
604	ofslen = SvCUR(sv);
605	break;
606	case '#':
607	if (ofmt)
608	Safefree(ofmt);
609	ofmt = savestr(SvPV(sv));
610	break;
611	case '[':
612	arybase = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
613	break;
614	case '?':
615	statusvalue = U_S(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
616	break;
617	case '!':
618	errno = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv); /* will anyone ever use this? */
619	break;
620	case '<':
621	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
622	if (delaymagic) {
623	delaymagic \|= DM_RUID;
624	break; /* don't do magic till later */
625	}
626	#ifdef HAS_SETRUID
627	(void)setruid((UIDTYPE)uid);
628	#else
629	#ifdef HAS_SETREUID
630	(void)setreuid((UIDTYPE)uid, (UIDTYPE)-1);
631	#else
632	if (uid == euid) /* special case $< = $> */
633	(void)setuid(uid);
634	else
635	fatal("setruid() not implemented");
636	#endif
637	#endif
638	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
639	break;
640	case '>':
641	euid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
642	if (delaymagic) {
643	delaymagic \|= DM_EUID;
644	break; /* don't do magic till later */
645	}
646	#ifdef HAS_SETEUID
647	(void)seteuid((UIDTYPE)euid);
648	#else
649	#ifdef HAS_SETREUID
650	(void)setreuid((UIDTYPE)-1, (UIDTYPE)euid);
651	#else
652	if (euid == uid) /* special case $> = $< */
653	setuid(euid);
654	else
655	fatal("seteuid() not implemented");
656	#endif
657	#endif
658	euid = (I32)geteuid();
659	break;
660	case '(':
661	gid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
662	if (delaymagic) {
663	delaymagic \|= DM_RGID;
664	break; /* don't do magic till later */
665	}
666	#ifdef HAS_SETRGID
667	(void)setrgid((GIDTYPE)gid);
668	#else
669	#ifdef HAS_SETREGID
670	(void)setregid((GIDTYPE)gid, (GIDTYPE)-1);
671	#else
672	if (gid == egid) /* special case $( = $) */
673	(void)setgid(gid);
674	else
675	fatal("setrgid() not implemented");
676	#endif
677	#endif
678	gid = (I32)getgid();
679	break;
680	case ')':
681	egid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
682	if (delaymagic) {
683	delaymagic \|= DM_EGID;
684	break; /* don't do magic till later */
685	}
686	#ifdef HAS_SETEGID
687	(void)setegid((GIDTYPE)egid);
688	#else
689	#ifdef HAS_SETREGID
690	(void)setregid((GIDTYPE)-1, (GIDTYPE)egid);
691	#else
692	if (egid == gid) /* special case $) = $( */
693	(void)setgid(egid);
694	else
695	fatal("setegid() not implemented");
696	#endif
697	#endif
698	egid = (I32)getegid();
699	break;
700	case ':':
701	chopset = SvPV(sv);
702	break;
703	case '0':
704	if (!origalen) {
705	s = origargv[0];
706	s += strlen(s);
707	/* See if all the arguments are contiguous in memory */
708	for (i = 1; i < origargc; i++) {
709	if (origargv[i] == s + 1)
710	s += strlen(++s); /* this one is ok too */
711	}
712	if (origenviron[0] == s + 1) { /* can grab env area too? */
713	my_setenv("NoNeSuCh", Nullch);
714	/* force copy of environment */
715	for (i = 0; origenviron[i]; i++)
716	if (origenviron[i] == s + 1)
717	s += strlen(++s);
718	}
719	origalen = s - origargv[0];
720	}
721	s = SvPV(sv);
722	i = SvCUR(sv);
723	if (i >= origalen) {
724	i = origalen;
725	SvCUR_set(sv, i);
726	*SvEND(sv) = '\0';
727	Copy(s, origargv[0], i, char);
728	}
729	else {
730	Copy(s, origargv[0], i, char);
731	s = origargv[0]+i;
732	*s++ = '\0';
733	while (++i < origalen)
734	*s++ = ' ';
735	}
736	break;
737	}
738	return 0;
739	}
740
741	I32
742	whichsig(sig)
743	char *sig;
744	{
745	register char **sigv;
746
747	for (sigv = sig_name+1; *sigv; sigv++)
748	if (strEQ(sig,*sigv))
749	return sigv - sig_name;
750	#ifdef SIGCLD
751	if (strEQ(sig,"CHLD"))
752	return SIGCLD;
753	#endif
754	#ifdef SIGCHLD
755	if (strEQ(sig,"CLD"))
756	return SIGCHLD;
757	#endif
758	return 0;
759	}
760
761	static handlertype
762	sighandler(sig)
763	I32 sig;
764	{
765	dSP;
766	GV *gv;
767	SV *sv;
768	CV *cv;
769	CONTEXT *cx;
770	AV *oldstack;
771	I32 hasargs = 1;
772	I32 items = 1;
773	I32 gimme = G_SCALAR;
774
775	#ifdef OS2 /* or anybody else who requires SIG_ACK */
776	signal(sig, SIG_ACK);
777	#endif
778
779	gv = gv_fetchpv(
780	SvPVnx(*hv_fetch(GvHVn(siggv),sig_name[sig],strlen(sig_name[sig]),
781	TRUE)), TRUE);
782	cv = GvCV(gv);
783	if (!cv && *sig_name[sig] == 'C' && instr(sig_name[sig],"LD")) {
784	if (sig_name[sig][1] == 'H')
785	gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CLD",3,TRUE)),
786	TRUE);
787	else
788	gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CHLD",4,TRUE)),
789	TRUE);
790	cv = GvCV(gv); /* gag */
791	}
792	if (!cv) {
793	if (dowarn)
794	warn("SIG%s handler \"%s\" not defined.\n",
795	sig_name[sig], GvENAME(gv) );
796	return;
797	}
798
799	oldstack = stack;
800	SWITCHSTACK(stack, signalstack);
801
802	sv = sv_mortalcopy(&sv_undef);
803	sv_setpv(sv,sig_name[sig]);
804	PUSHs(sv);
805
806	ENTER;
807	SAVETMPS;
808
809	push_return(op);
810	push_return(0);
811	PUSHBLOCK(cx, CXt_SUB, sp);
812	PUSHSUB(cx);
813	cx->blk_sub.savearray = GvAV(defgv);
814	cx->blk_sub.argarray = av_fake(items, sp);
815	GvAV(defgv) = cx->blk_sub.argarray;
816	CvDEPTH(cv)++;
817	if (CvDEPTH(cv) >= 2) {
818	if (CvDEPTH(cv) == 100 && dowarn)
819	warn("Deep recursion on subroutine \"%s\"",GvENAME(gv));
820	}
821	op = CvSTART(cv);
822	PUTBACK;
823	run(); /* Does the LEAVE for us. */
824
825	SWITCHSTACK(signalstack, oldstack);
826	op = pop_return();
827
828	return;
829	}
830
831	#ifdef OLD
832	if (sv->sv_magic && !sv->sv_rare) {
833	GV *gv = sv->sv_magic->sv_u.sv_gv;
834
835	switch (*SvPV(gv->sv_magic)) {
836	case '1': case '2': case '3': case '4':
837	case '5': case '6': case '7': case '8': case '9': case '&':
838	if (curpm) {
839	paren = atoi(GvENAME(gv));
840	getparen:
841	if (curpm->op_pmregexp &&
842	paren <= curpm->op_pmregexp->nparens &&
843	(s = curpm->op_pmregexp->startp[paren]) ) {
844	i = curpm->op_pmregexp->endp[paren] - s;
845	if (i >= 0)
846	return i;
847	else
848	return 0;
849	}
850	else
851	return 0;
852	}
853	break;
854	case '+':
855	if (curpm) {
856	paren = curpm->op_pmregexp->lastparen;
857	goto getparen;
858	}
859	break;
860	case '`':
861	if (curpm) {
862	if (curpm->op_pmregexp &&
863	(s = curpm->op_pmregexp->subbeg) ) {
864	i = curpm->op_pmregexp->startp[0] - s;
865	if (i >= 0)
866	return i;
867	else
868	return 0;
869	}
870	else
871	return 0;
872	}
873	break;
874	case '\'':
875	if (curpm) {
876	if (curpm->op_pmregexp &&
877	(s = curpm->op_pmregexp->endp[0]) ) {
878	return (STRLEN) (curpm->op_pmregexp->subend - s);
879	}
880	else
881	return 0;
882	}
883	break;
884	case ',':
885	return (STRLEN)ofslen;
886	case '\\':
887	return (STRLEN)orslen;
888	}
889	sv = gv_str(sv);
890	}
891	#endif