forked from schacon/perl
/
pp_ctl.c
5374 lines (4844 loc) · 131 KB
/
pp_ctl.c
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/* pp_ctl.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* Now far ahead the Road has gone,
* And I must follow, if I can,
* Pursuing it with eager feet,
* Until it joins some larger way
* Where many paths and errands meet.
* And whither then? I cannot say.
*
* [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
*/
/* This file contains control-oriented pp ("push/pop") functions that
* execute the opcodes that make up a perl program. A typical pp function
* expects to find its arguments on the stack, and usually pushes its
* results onto the stack, hence the 'pp' terminology. Each OP structure
* contains a pointer to the relevant pp_foo() function.
*
* Control-oriented means things like pp_enteriter() and pp_next(), which
* alter the flow of control of the program.
*/
#include "EXTERN.h"
#define PERL_IN_PP_CTL_C
#include "perl.h"
#ifndef WORD_ALIGN
#define WORD_ALIGN sizeof(U32)
#endif
#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
PP(pp_wantarray)
{
dVAR;
dSP;
I32 cxix;
EXTEND(SP, 1);
cxix = dopoptosub(cxstack_ix);
if (cxix < 0)
RETPUSHUNDEF;
switch (cxstack[cxix].blk_gimme) {
case G_ARRAY:
RETPUSHYES;
case G_SCALAR:
RETPUSHNO;
default:
RETPUSHUNDEF;
}
}
PP(pp_regcreset)
{
dVAR;
/* XXXX Should store the old value to allow for tie/overload - and
restore in regcomp, where marked with XXXX. */
PL_reginterp_cnt = 0;
TAINT_NOT;
return NORMAL;
}
PP(pp_regcomp)
{
dVAR;
dSP;
register PMOP *pm = (PMOP*)cLOGOP->op_other;
SV *tmpstr;
REGEXP *re = NULL;
/* prevent recompiling under /o and ithreads. */
#if defined(USE_ITHREADS)
if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
if (PL_op->op_flags & OPf_STACKED) {
dMARK;
SP = MARK;
}
else
(void)POPs;
RETURN;
}
#endif
#define tryAMAGICregexp(rx) \
STMT_START { \
SvGETMAGIC(rx); \
if (SvROK(rx) && SvAMAGIC(rx)) { \
SV *sv = AMG_CALLunary(rx, regexp_amg); \
if (sv) { \
if (SvROK(sv)) \
sv = SvRV(sv); \
if (SvTYPE(sv) != SVt_REGEXP) \
Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); \
rx = sv; \
} \
} \
} STMT_END
if (PL_op->op_flags & OPf_STACKED) {
/* multiple args; concatenate them */
dMARK; dORIGMARK;
tmpstr = PAD_SV(ARGTARG);
sv_setpvs(tmpstr, "");
while (++MARK <= SP) {
SV *msv = *MARK;
SV *sv;
tryAMAGICregexp(msv);
if ((SvAMAGIC(tmpstr) || SvAMAGIC(msv)) &&
(sv = amagic_call(tmpstr, msv, concat_amg, AMGf_assign)))
{
sv_setsv(tmpstr, sv);
continue;
}
sv_catsv_nomg(tmpstr, msv);
}
SvSETMAGIC(tmpstr);
SP = ORIGMARK;
}
else {
tmpstr = POPs;
tryAMAGICregexp(tmpstr);
}
#undef tryAMAGICregexp
if (SvROK(tmpstr)) {
SV * const sv = SvRV(tmpstr);
if (SvTYPE(sv) == SVt_REGEXP)
re = (REGEXP*) sv;
}
else if (SvTYPE(tmpstr) == SVt_REGEXP)
re = (REGEXP*) tmpstr;
if (re) {
/* The match's LHS's get-magic might need to access this op's reg-
exp (as is sometimes the case with $'; see bug 70764). So we
must call get-magic now before we replace the regexp. Hopeful-
ly this hack can be replaced with the approach described at
http://www.nntp.perl.org/group/perl.perl5.porters/2007/03
/msg122415.html some day. */
if(pm->op_type == OP_MATCH) {
SV *lhs;
const bool was_tainted = PL_tainted;
if (pm->op_flags & OPf_STACKED)
lhs = TOPs;
else if (pm->op_private & OPpTARGET_MY)
lhs = PAD_SV(pm->op_targ);
else lhs = DEFSV;
SvGETMAGIC(lhs);
/* Restore the previous value of PL_tainted (which may have been
modified by get-magic), to avoid incorrectly setting the
RXf_TAINTED flag further down. */
PL_tainted = was_tainted;
}
re = reg_temp_copy(NULL, re);
ReREFCNT_dec(PM_GETRE(pm));
PM_SETRE(pm, re);
}
else {
STRLEN len = 0;
const char *t = SvOK(tmpstr) ? SvPV_nomg_const(tmpstr, len) : "";
re = PM_GETRE(pm);
assert (re != (REGEXP*) &PL_sv_undef);
/* Check against the last compiled regexp. */
if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
memNE(RX_PRECOMP(re), t, len))
{
const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
U32 pm_flags = pm->op_pmflags & RXf_PMf_COMPILETIME;
if (re) {
ReREFCNT_dec(re);
#ifdef USE_ITHREADS
PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
#else
PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
#endif
} else if (PL_curcop->cop_hints_hash) {
SV *ptr = cop_hints_fetch_pvs(PL_curcop, "regcomp", 0);
if (ptr && SvIOK(ptr) && SvIV(ptr))
eng = INT2PTR(regexp_engine*,SvIV(ptr));
}
if (PL_op->op_flags & OPf_SPECIAL)
PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
if (DO_UTF8(tmpstr)) {
assert (SvUTF8(tmpstr));
} else if (SvUTF8(tmpstr)) {
/* Not doing UTF-8, despite what the SV says. Is this only if
we're trapped in use 'bytes'? */
/* Make a copy of the octet sequence, but without the flag on,
as the compiler now honours the SvUTF8 flag on tmpstr. */
STRLEN len;
const char *const p = SvPV(tmpstr, len);
tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
}
else if (SvAMAGIC(tmpstr)) {
/* make a copy to avoid extra stringifies */
tmpstr = newSVpvn_flags(t, len, SVs_TEMP | SvUTF8(tmpstr));
}
/* If it is gmagical, create a mortal copy, but without calling
get-magic, as we have already done that. */
if(SvGMAGICAL(tmpstr)) {
SV *mortalcopy = sv_newmortal();
sv_setsv_flags(mortalcopy, tmpstr, 0);
tmpstr = mortalcopy;
}
if (eng)
PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
else
PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
inside tie/overload accessors. */
}
}
re = PM_GETRE(pm);
#ifndef INCOMPLETE_TAINTS
if (PL_tainting) {
if (PL_tainted) {
SvTAINTED_on((SV*)re);
RX_EXTFLAGS(re) |= RXf_TAINTED;
}
}
#endif
if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
pm = PL_curpm;
#if !defined(USE_ITHREADS)
/* can't change the optree at runtime either */
/* PMf_KEEP is handled differently under threads to avoid these problems */
if (pm->op_pmflags & PMf_KEEP) {
pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
cLOGOP->op_first->op_next = PL_op->op_next;
}
#endif
RETURN;
}
PP(pp_substcont)
{
dVAR;
dSP;
register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
register PMOP * const pm = (PMOP*) cLOGOP->op_other;
register SV * const dstr = cx->sb_dstr;
register char *s = cx->sb_s;
register char *m = cx->sb_m;
char *orig = cx->sb_orig;
register REGEXP * const rx = cx->sb_rx;
SV *nsv = NULL;
REGEXP *old = PM_GETRE(pm);
PERL_ASYNC_CHECK();
if(old != rx) {
if(old)
ReREFCNT_dec(old);
PM_SETRE(pm,ReREFCNT_inc(rx));
}
rxres_restore(&cx->sb_rxres, rx);
RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
if (cx->sb_iters++) {
const I32 saviters = cx->sb_iters;
if (cx->sb_iters > cx->sb_maxiters)
DIE(aTHX_ "Substitution loop");
SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
/* See "how taint works" above pp_subst() */
if (SvTAINTED(TOPs))
cx->sb_rxtainted |= SUBST_TAINT_REPL;
sv_catsv_nomg(dstr, POPs);
/* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
s -= RX_GOFS(rx);
/* Are we done */
if (CxONCE(cx) || s < orig ||
!CALLREGEXEC(rx, s, cx->sb_strend, orig,
(s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
((cx->sb_rflags & REXEC_COPY_STR)
? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
: (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
{
SV * const targ = cx->sb_targ;
assert(cx->sb_strend >= s);
if(cx->sb_strend > s) {
if (DO_UTF8(dstr) && !SvUTF8(targ))
sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
else
sv_catpvn(dstr, s, cx->sb_strend - s);
}
if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
cx->sb_rxtainted |= SUBST_TAINT_PAT;
#ifdef PERL_OLD_COPY_ON_WRITE
if (SvIsCOW(targ)) {
sv_force_normal_flags(targ, SV_COW_DROP_PV);
} else
#endif
{
SvPV_free(targ);
}
SvPV_set(targ, SvPVX(dstr));
SvCUR_set(targ, SvCUR(dstr));
SvLEN_set(targ, SvLEN(dstr));
if (DO_UTF8(dstr))
SvUTF8_on(targ);
SvPV_set(dstr, NULL);
if (pm->op_pmflags & PMf_NONDESTRUCT)
PUSHs(targ);
else
mPUSHi(saviters - 1);
(void)SvPOK_only_UTF8(targ);
/* update the taint state of various various variables in
* preparation for final exit.
* See "how taint works" above pp_subst() */
if (PL_tainting) {
if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
== (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
)
(RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
&& (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
)
SvTAINTED_on(TOPs); /* taint return value */
/* needed for mg_set below */
PL_tainted = cBOOL(cx->sb_rxtainted &
(SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
SvTAINT(TARG);
}
/* PL_tainted must be correctly set for this mg_set */
SvSETMAGIC(TARG);
TAINT_NOT;
LEAVE_SCOPE(cx->sb_oldsave);
POPSUBST(cx);
RETURNOP(pm->op_next);
/* NOTREACHED */
}
cx->sb_iters = saviters;
}
if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
m = s;
s = orig;
cx->sb_orig = orig = RX_SUBBEG(rx);
s = orig + (m - s);
cx->sb_strend = s + (cx->sb_strend - m);
}
cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
if (m > s) {
if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
else
sv_catpvn(dstr, s, m-s);
}
cx->sb_s = RX_OFFS(rx)[0].end + orig;
{ /* Update the pos() information. */
SV * const sv = cx->sb_targ;
MAGIC *mg;
SvUPGRADE(sv, SVt_PVMG);
if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
#ifdef PERL_OLD_COPY_ON_WRITE
if (SvIsCOW(sv))
sv_force_normal_flags(sv, 0);
#endif
mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
NULL, 0);
}
mg->mg_len = m - orig;
}
if (old != rx)
(void)ReREFCNT_inc(rx);
/* update the taint state of various various variables in preparation
* for calling the code block.
* See "how taint works" above pp_subst() */
if (PL_tainting) {
if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
cx->sb_rxtainted |= SUBST_TAINT_PAT;
if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
== (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
)
(RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
if (cx->sb_iters > 1 && (cx->sb_rxtainted &
(SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
SvTAINTED_on(cx->sb_targ);
TAINT_NOT;
}
rxres_save(&cx->sb_rxres, rx);
PL_curpm = pm;
RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
}
void
Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
{
UV *p = (UV*)*rsp;
U32 i;
PERL_ARGS_ASSERT_RXRES_SAVE;
PERL_UNUSED_CONTEXT;
if (!p || p[1] < RX_NPARENS(rx)) {
#ifdef PERL_OLD_COPY_ON_WRITE
i = 7 + RX_NPARENS(rx) * 2;
#else
i = 6 + RX_NPARENS(rx) * 2;
#endif
if (!p)
Newx(p, i, UV);
else
Renew(p, i, UV);
*rsp = (void*)p;
}
*p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
RX_MATCH_COPIED_off(rx);
#ifdef PERL_OLD_COPY_ON_WRITE
*p++ = PTR2UV(RX_SAVED_COPY(rx));
RX_SAVED_COPY(rx) = NULL;
#endif
*p++ = RX_NPARENS(rx);
*p++ = PTR2UV(RX_SUBBEG(rx));
*p++ = (UV)RX_SUBLEN(rx);
for (i = 0; i <= RX_NPARENS(rx); ++i) {
*p++ = (UV)RX_OFFS(rx)[i].start;
*p++ = (UV)RX_OFFS(rx)[i].end;
}
}
static void
S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
{
UV *p = (UV*)*rsp;
U32 i;
PERL_ARGS_ASSERT_RXRES_RESTORE;
PERL_UNUSED_CONTEXT;
RX_MATCH_COPY_FREE(rx);
RX_MATCH_COPIED_set(rx, *p);
*p++ = 0;
#ifdef PERL_OLD_COPY_ON_WRITE
if (RX_SAVED_COPY(rx))
SvREFCNT_dec (RX_SAVED_COPY(rx));
RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
*p++ = 0;
#endif
RX_NPARENS(rx) = *p++;
RX_SUBBEG(rx) = INT2PTR(char*,*p++);
RX_SUBLEN(rx) = (I32)(*p++);
for (i = 0; i <= RX_NPARENS(rx); ++i) {
RX_OFFS(rx)[i].start = (I32)(*p++);
RX_OFFS(rx)[i].end = (I32)(*p++);
}
}
static void
S_rxres_free(pTHX_ void **rsp)
{
UV * const p = (UV*)*rsp;
PERL_ARGS_ASSERT_RXRES_FREE;
PERL_UNUSED_CONTEXT;
if (p) {
#ifdef PERL_POISON
void *tmp = INT2PTR(char*,*p);
Safefree(tmp);
if (*p)
PoisonFree(*p, 1, sizeof(*p));
#else
Safefree(INT2PTR(char*,*p));
#endif
#ifdef PERL_OLD_COPY_ON_WRITE
if (p[1]) {
SvREFCNT_dec (INT2PTR(SV*,p[1]));
}
#endif
Safefree(p);
*rsp = NULL;
}
}
PP(pp_formline)
{
dVAR; dSP; dMARK; dORIGMARK;
register SV * const tmpForm = *++MARK;
register U32 *fpc;
register char *t;
const char *f;
register I32 arg;
register SV *sv = NULL;
const char *item = NULL;
I32 itemsize = 0;
I32 fieldsize = 0;
I32 lines = 0;
bool chopspace = (strchr(PL_chopset, ' ') != NULL);
const char *chophere = NULL;
char *linemark = NULL;
NV value;
bool gotsome = FALSE;
STRLEN len;
const STRLEN fudge = SvPOKp(tmpForm)
? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
bool item_is_utf8 = FALSE;
bool targ_is_utf8 = FALSE;
SV * nsv = NULL;
OP * parseres = NULL;
const char *fmt;
if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
if (SvREADONLY(tmpForm)) {
SvREADONLY_off(tmpForm);
parseres = doparseform(tmpForm);
SvREADONLY_on(tmpForm);
}
else
parseres = doparseform(tmpForm);
if (parseres)
return parseres;
}
SvPV_force(PL_formtarget, len);
if (SvTAINTED(tmpForm))
SvTAINTED_on(PL_formtarget);
if (DO_UTF8(PL_formtarget))
targ_is_utf8 = TRUE;
t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
t += len;
f = SvPV_const(tmpForm, len);
/* need to jump to the next word */
fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
for (;;) {
DEBUG_f( {
const char *name = "???";
arg = -1;
switch (*fpc) {
case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
case FF_CHECKNL: name = "CHECKNL"; break;
case FF_CHECKCHOP: name = "CHECKCHOP"; break;
case FF_SPACE: name = "SPACE"; break;
case FF_HALFSPACE: name = "HALFSPACE"; break;
case FF_ITEM: name = "ITEM"; break;
case FF_CHOP: name = "CHOP"; break;
case FF_LINEGLOB: name = "LINEGLOB"; break;
case FF_NEWLINE: name = "NEWLINE"; break;
case FF_MORE: name = "MORE"; break;
case FF_LINEMARK: name = "LINEMARK"; break;
case FF_END: name = "END"; break;
case FF_0DECIMAL: name = "0DECIMAL"; break;
case FF_LINESNGL: name = "LINESNGL"; break;
}
if (arg >= 0)
PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
else
PerlIO_printf(Perl_debug_log, "%-16s\n", name);
} );
switch (*fpc++) {
case FF_LINEMARK:
linemark = t;
lines++;
gotsome = FALSE;
break;
case FF_LITERAL:
arg = *fpc++;
if (targ_is_utf8 && !SvUTF8(tmpForm)) {
SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
*t = '\0';
sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
t = SvEND(PL_formtarget);
f += arg;
break;
}
if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
*t = '\0';
sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
t = SvEND(PL_formtarget);
targ_is_utf8 = TRUE;
}
while (arg--)
*t++ = *f++;
break;
case FF_SKIP:
f += *fpc++;
break;
case FF_FETCH:
arg = *fpc++;
f += arg;
fieldsize = arg;
if (MARK < SP)
sv = *++MARK;
else {
sv = &PL_sv_no;
Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
}
if (SvTAINTED(sv))
SvTAINTED_on(PL_formtarget);
break;
case FF_CHECKNL:
{
const char *send;
const char *s = item = SvPV_const(sv, len);
itemsize = len;
if (DO_UTF8(sv)) {
itemsize = sv_len_utf8(sv);
if (itemsize != (I32)len) {
I32 itembytes;
if (itemsize > fieldsize) {
itemsize = fieldsize;
itembytes = itemsize;
sv_pos_u2b(sv, &itembytes, 0);
}
else
itembytes = len;
send = chophere = s + itembytes;
while (s < send) {
if (*s & ~31)
gotsome = TRUE;
else if (*s == '\n')
break;
s++;
}
item_is_utf8 = TRUE;
itemsize = s - item;
sv_pos_b2u(sv, &itemsize);
break;
}
}
item_is_utf8 = FALSE;
if (itemsize > fieldsize)
itemsize = fieldsize;
send = chophere = s + itemsize;
while (s < send) {
if (*s & ~31)
gotsome = TRUE;
else if (*s == '\n')
break;
s++;
}
itemsize = s - item;
break;
}
case FF_CHECKCHOP:
{
const char *s = item = SvPV_const(sv, len);
itemsize = len;
if (DO_UTF8(sv)) {
itemsize = sv_len_utf8(sv);
if (itemsize != (I32)len) {
I32 itembytes;
if (itemsize <= fieldsize) {
const char *send = chophere = s + itemsize;
while (s < send) {
if (*s == '\r') {
itemsize = s - item;
chophere = s;
break;
}
if (*s++ & ~31)
gotsome = TRUE;
}
}
else {
const char *send;
itemsize = fieldsize;
itembytes = itemsize;
sv_pos_u2b(sv, &itembytes, 0);
send = chophere = s + itembytes;
while (s < send || (s == send && isSPACE(*s))) {
if (isSPACE(*s)) {
if (chopspace)
chophere = s;
if (*s == '\r')
break;
}
else {
if (*s & ~31)
gotsome = TRUE;
if (strchr(PL_chopset, *s))
chophere = s + 1;
}
s++;
}
itemsize = chophere - item;
sv_pos_b2u(sv, &itemsize);
}
item_is_utf8 = TRUE;
break;
}
}
item_is_utf8 = FALSE;
if (itemsize <= fieldsize) {
const char *const send = chophere = s + itemsize;
while (s < send) {
if (*s == '\r') {
itemsize = s - item;
chophere = s;
break;
}
if (*s++ & ~31)
gotsome = TRUE;
}
}
else {
const char *send;
itemsize = fieldsize;
send = chophere = s + itemsize;
while (s < send || (s == send && isSPACE(*s))) {
if (isSPACE(*s)) {
if (chopspace)
chophere = s;
if (*s == '\r')
break;
}
else {
if (*s & ~31)
gotsome = TRUE;
if (strchr(PL_chopset, *s))
chophere = s + 1;
}
s++;
}
itemsize = chophere - item;
}
break;
}
case FF_SPACE:
arg = fieldsize - itemsize;
if (arg) {
fieldsize -= arg;
while (arg-- > 0)
*t++ = ' ';
}
break;
case FF_HALFSPACE:
arg = fieldsize - itemsize;
if (arg) {
arg /= 2;
fieldsize -= arg;
while (arg-- > 0)
*t++ = ' ';
}
break;
case FF_ITEM:
{
const char *s = item;
arg = itemsize;
if (item_is_utf8) {
if (!targ_is_utf8) {
SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
*t = '\0';
sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
fudge + 1);
t = SvEND(PL_formtarget);
targ_is_utf8 = TRUE;
}
while (arg--) {
if (UTF8_IS_CONTINUED(*s)) {
STRLEN skip = UTF8SKIP(s);
switch (skip) {
default:
Move(s,t,skip,char);
s += skip;
t += skip;
break;
case 7: *t++ = *s++;
case 6: *t++ = *s++;
case 5: *t++ = *s++;
case 4: *t++ = *s++;
case 3: *t++ = *s++;
case 2: *t++ = *s++;
case 1: *t++ = *s++;
}
}
else {
if ( !((*t++ = *s++) & ~31) )
t[-1] = ' ';
}
}
break;
}
if (targ_is_utf8 && !item_is_utf8) {
SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
*t = '\0';
sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
for (; t < SvEND(PL_formtarget); t++) {
#ifdef EBCDIC
const int ch = *t;
if (iscntrl(ch))
#else
if (!(*t & ~31))
#endif
*t = ' ';
}
break;
}
while (arg--) {
#ifdef EBCDIC
const int ch = *t++ = *s++;
if (iscntrl(ch))
#else
if ( !((*t++ = *s++) & ~31) )
#endif
t[-1] = ' ';
}
break;
}
case FF_CHOP:
{
const char *s = chophere;
if (chopspace) {
while (isSPACE(*s))
s++;
}
sv_chop(sv,s);
SvSETMAGIC(sv);
break;
}
case FF_LINESNGL:
chopspace = 0;
case FF_LINEGLOB:
{
const bool oneline = fpc[-1] == FF_LINESNGL;
const char *s = item = SvPV_const(sv, len);
item_is_utf8 = DO_UTF8(sv);
itemsize = len;
if (itemsize) {
STRLEN to_copy = itemsize;
const char *const send = s + len;
const U8 *source = (const U8 *) s;
U8 *tmp = NULL;
gotsome = TRUE;
chophere = s + itemsize;
while (s < send) {
if (*s++ == '\n') {
if (oneline) {
to_copy = s - SvPVX_const(sv) - 1;
chophere = s;
break;
} else {
if (s == send) {
itemsize--;
to_copy--;
} else
lines++;
}
}
}
if (targ_is_utf8 && !item_is_utf8) {
source = tmp = bytes_to_utf8(source, &to_copy);
SvCUR_set(PL_formtarget,
t - SvPVX_const(PL_formtarget));
} else {
if (item_is_utf8 && !targ_is_utf8) {
/* Upgrade targ to UTF8, and then we reduce it to
a problem we have a simple solution for. */
SvCUR_set(PL_formtarget,
t - SvPVX_const(PL_formtarget));
targ_is_utf8 = TRUE;
/* Don't need get magic. */
sv_utf8_upgrade_nomg(PL_formtarget);
} else {
SvCUR_set(PL_formtarget,
t - SvPVX_const(PL_formtarget));
}
/* Easy. They agree. */
assert (item_is_utf8 == targ_is_utf8);
}
SvGROW(PL_formtarget,
SvCUR(PL_formtarget) + to_copy + fudge + 1);
t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
Copy(source, t, to_copy, char);
t += to_copy;
SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
if (item_is_utf8) {
if (SvGMAGICAL(sv)) {
/* Mustn't call sv_pos_b2u() as it does a second
mg_get(). Is this a bug? Do we need a _flags()
variant? */
itemsize = utf8_length(source, source + itemsize);
} else {
sv_pos_b2u(sv, &itemsize);
}
assert(!tmp);
} else if (tmp) {
Safefree(tmp);
}
}
break;
}
case FF_0DECIMAL:
arg = *fpc++;
#if defined(USE_LONG_DOUBLE)
fmt = (const char *)
((arg & 256) ?
"%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
#else
fmt = (const char *)
((arg & 256) ?
"%#0*.*f" : "%0*.*f");
#endif
goto ff_dec;
case FF_DECIMAL:
arg = *fpc++;
#if defined(USE_LONG_DOUBLE)
fmt = (const char *)
((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
#else
fmt = (const char *)
((arg & 256) ? "%#*.*f" : "%*.*f");
#endif
ff_dec:
/* If the field is marked with ^ and the value is undefined,
blank it out. */
if ((arg & 512) && !SvOK(sv)) {
arg = fieldsize;
while (arg--)
*t++ = ' ';
break;
}
gotsome = TRUE;
value = SvNV(sv);
/* overflow evidence */
if (num_overflow(value, fieldsize, arg)) {
arg = fieldsize;
while (arg--)
*t++ = '#';
break;
}
/* Formats aren't yet marked for locales, so assume "yes". */
{
STORE_NUMERIC_STANDARD_SET_LOCAL();
my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
RESTORE_NUMERIC_STANDARD();
}
t += fieldsize;
break;