openkylin
/
perl
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
perl/doop.c

1325 lines
34 KiB
C
Raw Blame History

/* doop.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009 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.
*
*/
/*
* 'So that was the job I felt I had to do when I started,' thought Sam.
*
* [p.934 of _The Lord of the Rings_, VI/iii: "Mount Doom"]
*/
/* This file contains some common functions needed to carry out certain
* ops. For example, both pp_sprintf() and pp_prtf() call the function
* do_sprintf() found in this file.
*/
#include "EXTERN.h"
#define PERL_IN_DOOP_C
#include "perl.h"
#ifndef PERL_MICRO
#include <signal.h>
#endif
/* Helper function for do_trans().
* Handles non-utf8 cases(*) not involving the /c, /d, /s flags,
* and where search and replacement charlists aren't identical.
* (*) i.e. where the search and replacement charlists are non-utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_simple(pTHX_ SV * const sv)
{
Size_t matches = 0;
STRLEN len;
U8 *s = (U8*)SvPV_nomg(sv,len);
U8 * const send = s+len;
const OPtrans_map * const tbl = (OPtrans_map*)cPVOP->op_pv;
PERL_ARGS_ASSERT_DO_TRANS_SIMPLE;
if (!tbl)
Perl_croak(aTHX_ "panic: do_trans_simple line %d",__LINE__);
/* First, take care of non-UTF-8 input strings, because they're easy */
if (!SvUTF8(sv)) {
while (s < send) {
const short ch = tbl->map[*s];
if (ch >= 0) {
matches++;
*s = (U8)ch;
}
s++;
}
SvSETMAGIC(sv);
}
else {
const bool grows = cBOOL(PL_op->op_private & OPpTRANS_GROWS);
U8 *d;
U8 *dstart;
/* Allow for expansion: $_="a".chr(400); tr/a/\xFE/, FE needs encoding */
if (grows)
Newx(d, len*2+1, U8);
else
d = s;
dstart = d;
while (s < send) {
STRLEN ulen;
short ch;
/* Need to check this, otherwise 128..255 won't match */
const UV c = utf8n_to_uvchr(s, send - s, &ulen, UTF8_ALLOW_DEFAULT);
if (c < 0x100 && (ch = tbl->map[c]) >= 0) {
matches++;
d = uvchr_to_utf8(d, (UV)ch);
s += ulen;
}
else { /* No match -> copy */
Move(s, d, ulen, U8);
d += ulen;
s += ulen;
}
}
if (grows) {
sv_setpvn(sv, (char*)dstart, d - dstart);
Safefree(dstart);
}
else {
*d = '\0';
SvCUR_set(sv, d - dstart);
}
SvUTF8_on(sv);
SvSETMAGIC(sv);
}
return matches;
}
/* Helper function for do_trans().
* Handles non-utf8 cases(*) where search and replacement charlists are
* identical: so the string isn't modified, and only a count of modifiable
* chars is needed.
* Note that it doesn't handle /d or /s, since these modify the string
* even if the replacement list is empty.
* (*) i.e. where the search and replacement charlists are non-utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_count(pTHX_ SV * const sv)
{
STRLEN len;
const U8 *s = (const U8*)SvPV_nomg_const(sv, len);
const U8 * const send = s + len;
Size_t matches = 0;
const OPtrans_map * const tbl = (OPtrans_map*)cPVOP->op_pv;
PERL_ARGS_ASSERT_DO_TRANS_COUNT;
if (!tbl)
Perl_croak(aTHX_ "panic: do_trans_count line %d",__LINE__);
if (!SvUTF8(sv)) {
while (s < send) {
if (tbl->map[*s++] >= 0)
matches++;
}
}
else {
const bool complement = cBOOL(PL_op->op_private & OPpTRANS_COMPLEMENT);
while (s < send) {
STRLEN ulen;
const UV c = utf8n_to_uvchr(s, send - s, &ulen, UTF8_ALLOW_DEFAULT);
if (c < 0x100) {
if (tbl->map[c] >= 0)
matches++;
} else if (complement)
matches++;
s += ulen;
}
}
return matches;
}
/* Helper function for do_trans().
* Handles non-utf8 cases(*) involving the /c, /d, /s flags,
* and where search and replacement charlists aren't identical.
* (*) i.e. where the search and replacement charlists are non-utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_complex(pTHX_ SV * const sv)
{
STRLEN len;
U8 *s = (U8*)SvPV_nomg(sv, len);
U8 * const send = s+len;
Size_t matches = 0;
const OPtrans_map * const tbl = (OPtrans_map*)cPVOP->op_pv;
PERL_ARGS_ASSERT_DO_TRANS_COMPLEX;
if (!tbl)
Perl_croak(aTHX_ "panic: do_trans_complex line %d",__LINE__);
if (!SvUTF8(sv)) {
U8 *d = s;
U8 * const dstart = d;
if (PL_op->op_private & OPpTRANS_SQUASH) {
const U8* p = send;
while (s < send) {
const short ch = tbl->map[*s];
if (ch >= 0) {
*d = (U8)ch;
matches++;
if (p != d - 1 || *p != *d)
p = d++;
}
else if (ch == -1) /* -1 is unmapped character */
*d++ = *s;
else if (ch == -2) /* -2 is delete character */
matches++;
s++;
}
}
else {
while (s < send) {
const short ch = tbl->map[*s];
if (ch >= 0) {
matches++;
*d++ = (U8)ch;
}
else if (ch == -1) /* -1 is unmapped character */
*d++ = *s;
else if (ch == -2) /* -2 is delete character */
matches++;
s++;
}
}
*d = '\0';
SvCUR_set(sv, d - dstart);
}
else { /* is utf8 */
const bool squash = cBOOL(PL_op->op_private & OPpTRANS_SQUASH);
const bool grows = cBOOL(PL_op->op_private & OPpTRANS_GROWS);
U8 *d;
U8 *dstart;
Size_t size = tbl->size;
UV pch = 0xfeedface;
if (grows)
Newx(d, len*2+1, U8);
else
d = s;
dstart = d;
while (s < send) {
STRLEN len;
const UV comp = utf8n_to_uvchr(s, send - s, &len,
UTF8_ALLOW_DEFAULT);
UV ch;
short sch;
sch = tbl->map[comp >= size ? size : comp];
if (sch >= 0) {
ch = (UV)sch;
replace:
matches++;
if (LIKELY(!squash || ch != pch)) {
d = uvchr_to_utf8(d, ch);
pch = ch;
}
s += len;
continue;
}
else if (sch == -1) { /* -1 is unmapped character */
Move(s, d, len, U8);
d += len;
}
else if (sch == -2) /* -2 is delete character */
matches++;
else {
assert(sch == -3); /* -3 is empty replacement */
ch = comp;
goto replace;
}
s += len;
pch = 0xfeedface;
}
if (grows) {
sv_setpvn(sv, (char*)dstart, d - dstart);
Safefree(dstart);
}
else {
*d = '\0';
SvCUR_set(sv, d - dstart);
}
SvUTF8_on(sv);
}
SvSETMAGIC(sv);
return matches;
}
/* Helper function for do_trans().
* Handles utf8 cases(*) not involving the /c, /d, /s flags,
* and where search and replacement charlists aren't identical.
* (*) i.e. where the search or replacement charlists are utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_simple_utf8(pTHX_ SV * const sv)
{
U8 *s;
U8 *send;
U8 *d;
U8 *start;
U8 *dstart, *dend;
Size_t matches = 0;
const bool grows = cBOOL(PL_op->op_private & OPpTRANS_GROWS);
STRLEN len;
SV* const rv =
#ifdef USE_ITHREADS
PAD_SVl(cPADOP->op_padix);
#else
MUTABLE_SV(cSVOP->op_sv);
#endif
HV* const hv = MUTABLE_HV(SvRV(rv));
SV* const * svp = hv_fetchs(hv, "NONE", FALSE);
const UV none = svp ? SvUV(*svp) : 0x7fffffff;
const UV extra = none + 1;
UV final = 0;
U8 hibit = 0;
PERL_ARGS_ASSERT_DO_TRANS_SIMPLE_UTF8;
s = (U8*)SvPV_nomg(sv, len);
if (!SvUTF8(sv)) {
hibit = ! is_utf8_invariant_string(s, len);
if (hibit) {
s = bytes_to_utf8(s, &len);
}
}
send = s + len;
start = s;
svp = hv_fetchs(hv, "FINAL", FALSE);
if (svp)
final = SvUV(*svp);
if (grows) {
/* d needs to be bigger than s, in case e.g. upgrading is required */
Newx(d, len * 3 + UTF8_MAXBYTES, U8);
dend = d + len * 3;
dstart = d;
}
else {
dstart = d = s;
dend = d + len;
}
while (s < send) {
const UV uv = swash_fetch(rv, s, TRUE);
if (uv < none) {
s += UTF8SKIP(s);
matches++;
d = uvchr_to_utf8(d, uv);
}
else if (uv == none) {
const int i = UTF8SKIP(s);
Move(s, d, i, U8);
d += i;
s += i;
}
else if (uv == extra) {
s += UTF8SKIP(s);
matches++;
d = uvchr_to_utf8(d, final);
}
else
s += UTF8SKIP(s);
if (d > dend) {
const STRLEN clen = d - dstart;
const STRLEN nlen = dend - dstart + len + UTF8_MAXBYTES;
if (!grows)
Perl_croak(aTHX_ "panic: do_trans_simple_utf8 line %d",__LINE__);
Renew(dstart, nlen + UTF8_MAXBYTES, U8);
d = dstart + clen;
dend = dstart + nlen;
}
}
if (grows || hibit) {
sv_setpvn(sv, (char*)dstart, d - dstart);
Safefree(dstart);
if (grows && hibit)
Safefree(start);
}
else {
*d = '\0';
SvCUR_set(sv, d - dstart);
}
SvSETMAGIC(sv);
SvUTF8_on(sv);
return matches;
}
/* Helper function for do_trans().
* Handles utf8 cases(*) where search and replacement charlists are
* identical: so the string isn't modified, and only a count of modifiable
* chars is needed.
* Note that it doesn't handle /d or /s, since these modify the string
* even if the replacement charlist is empty.
* (*) i.e. where the search or replacement charlists are utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_count_utf8(pTHX_ SV * const sv)
{
const U8 *s;
const U8 *start = NULL;
const U8 *send;
Size_t matches = 0;
STRLEN len;
SV* const rv =
#ifdef USE_ITHREADS
PAD_SVl(cPADOP->op_padix);
#else
MUTABLE_SV(cSVOP->op_sv);
#endif
HV* const hv = MUTABLE_HV(SvRV(rv));
SV* const * const svp = hv_fetchs(hv, "NONE", FALSE);
const UV none = svp ? SvUV(*svp) : 0x7fffffff;
const UV extra = none + 1;
U8 hibit = 0;
PERL_ARGS_ASSERT_DO_TRANS_COUNT_UTF8;
s = (const U8*)SvPV_nomg_const(sv, len);
if (!SvUTF8(sv)) {
hibit = ! is_utf8_invariant_string(s, len);
if (hibit) {
start = s = bytes_to_utf8(s, &len);
}
}
send = s + len;
while (s < send) {
const UV uv = swash_fetch(rv, s, TRUE);
if (uv < none || uv == extra)
matches++;
s += UTF8SKIP(s);
}
if (hibit)
Safefree(start);
return matches;
}
/* Helper function for do_trans().
* Handles utf8 cases(*) involving the /c, /d, /s flags,
* and where search and replacement charlists aren't identical.
* (*) i.e. where the search or replacement charlists are utf8. sv may
* or may not be utf8.
*/
STATIC Size_t
S_do_trans_complex_utf8(pTHX_ SV * const sv)
{
U8 *start, *send;
U8 *d;
Size_t matches = 0;
const bool squash = cBOOL(PL_op->op_private & OPpTRANS_SQUASH);
const bool del = cBOOL(PL_op->op_private & OPpTRANS_DELETE);
const bool grows = cBOOL(PL_op->op_private & OPpTRANS_GROWS);
SV* const rv =
#ifdef USE_ITHREADS
PAD_SVl(cPADOP->op_padix);
#else
MUTABLE_SV(cSVOP->op_sv);
#endif
HV * const hv = MUTABLE_HV(SvRV(rv));
SV * const *svp = hv_fetchs(hv, "NONE", FALSE);
const UV none = svp ? SvUV(*svp) : 0x7fffffff;
const UV extra = none + 1;
UV final = 0;
bool havefinal = FALSE;
STRLEN len;
U8 *dstart, *dend;
U8 hibit = 0;
U8 *s = (U8*)SvPV_nomg(sv, len);
PERL_ARGS_ASSERT_DO_TRANS_COMPLEX_UTF8;
if (!SvUTF8(sv)) {
hibit = ! is_utf8_invariant_string(s, len);
if (hibit) {
s = bytes_to_utf8(s, &len);
}
}
send = s + len;
start = s;
svp = hv_fetchs(hv, "FINAL", FALSE);
if (svp) {
final = SvUV(*svp);
havefinal = TRUE;
}
if (grows) {
/* d needs to be bigger than s, in case e.g. upgrading is required */
Newx(d, len * 3 + UTF8_MAXBYTES, U8);
dend = d + len * 3;
dstart = d;
}
else {
dstart = d = s;
dend = d + len;
}
if (squash) {
UV puv = 0xfeedface;
while (s < send) {
UV uv = swash_fetch(rv, s, TRUE);
if (d > dend) {
const STRLEN clen = d - dstart;
const STRLEN nlen = dend - dstart + len + UTF8_MAXBYTES;
if (!grows)
Perl_croak(aTHX_ "panic: do_trans_complex_utf8 line %d",__LINE__);
Renew(dstart, nlen + UTF8_MAXBYTES, U8);
d = dstart + clen;
dend = dstart + nlen;
}
if (uv < none) {
matches++;
s += UTF8SKIP(s);
if (uv != puv) {
d = uvchr_to_utf8(d, uv);
puv = uv;
}
continue;
}
else if (uv == none) { /* "none" is unmapped character */
const int i = UTF8SKIP(s);
Move(s, d, i, U8);
d += i;
s += i;
puv = 0xfeedface;
continue;
}
else if (uv == extra && !del) {
matches++;
if (havefinal) {
s += UTF8SKIP(s);
if (puv != final) {
d = uvchr_to_utf8(d, final);
puv = final;
}
}
else {
STRLEN len;
uv = utf8n_to_uvchr(s, send - s, &len, UTF8_ALLOW_DEFAULT);
if (uv != puv) {
Move(s, d, len, U8);
d += len;
puv = uv;
}
s += len;
}
continue;
}
matches++; /* "none+1" is delete character */
s += UTF8SKIP(s);
}
}
else {
while (s < send) {
const UV uv = swash_fetch(rv, s, TRUE);
if (d > dend) {
const STRLEN clen = d - dstart;
const STRLEN nlen = dend - dstart + len + UTF8_MAXBYTES;
if (!grows)
Perl_croak(aTHX_ "panic: do_trans_complex_utf8 line %d",__LINE__);
Renew(dstart, nlen + UTF8_MAXBYTES, U8);
d = dstart + clen;
dend = dstart + nlen;
}
if (uv < none) {
matches++;
s += UTF8SKIP(s);
d = uvchr_to_utf8(d, uv);
continue;
}
else if (uv == none) { /* "none" is unmapped character */
const int i = UTF8SKIP(s);
Move(s, d, i, U8);
d += i;
s += i;
continue;
}
else if (uv == extra && !del) {
matches++;
s += UTF8SKIP(s);
d = uvchr_to_utf8(d, final);
continue;
}
matches++; /* "none+1" is delete character */
s += UTF8SKIP(s);
}
}
if (grows || hibit) {
sv_setpvn(sv, (char*)dstart, d - dstart);
Safefree(dstart);
if (grows && hibit)
Safefree(start);
}
else {
*d = '\0';
SvCUR_set(sv, d - dstart);
}
SvUTF8_on(sv);
SvSETMAGIC(sv);
return matches;
}
/* Execute a tr//. sv is the value to be translated, while PL_op
* should be an OP_TRANS or OP_TRANSR op, whose op_pv field contains a
* translation table or whose op_sv field contains a swash.
* Returns a count of number of characters translated
*/
Size_t
Perl_do_trans(pTHX_ SV *sv)
{
STRLEN len;
const U8 flags = PL_op->op_private;
const U8 hasutf = flags & (OPpTRANS_FROM_UTF | OPpTRANS_TO_UTF);
PERL_ARGS_ASSERT_DO_TRANS;
if (SvREADONLY(sv) && !(flags & OPpTRANS_IDENTICAL)) {
Perl_croak_no_modify();
}
(void)SvPV_const(sv, len);
if (!len)
return 0;
if (!(flags & OPpTRANS_IDENTICAL)) {
if (!SvPOKp(sv) || SvTHINKFIRST(sv))
(void)SvPV_force_nomg(sv, len);
(void)SvPOK_only_UTF8(sv);
}
/* If we use only OPpTRANS_IDENTICAL to bypass the READONLY check,
* we must also rely on it to choose the readonly strategy.
*/
if (flags & OPpTRANS_IDENTICAL) {
return hasutf ? do_trans_count_utf8(sv) : do_trans_count(sv);
} else if (flags & (OPpTRANS_SQUASH|OPpTRANS_DELETE|OPpTRANS_COMPLEMENT)) {
return hasutf ? do_trans_complex_utf8(sv) : do_trans_complex(sv);
} else {
return hasutf ? do_trans_simple_utf8(sv) : do_trans_simple(sv);
}
}
void
Perl_do_join(pTHX_ SV *sv, SV *delim, SV **mark, SV **sp)
{
SV ** const oldmark = mark;
I32 items = sp - mark;
STRLEN len;
STRLEN delimlen;
const char * const delims = SvPV_const(delim, delimlen);
PERL_ARGS_ASSERT_DO_JOIN;
mark++;
len = (items > 0 ? (delimlen * (items - 1) ) : 0);
SvUPGRADE(sv, SVt_PV);
if (SvLEN(sv) < len + items) { /* current length is way too short */
while (items-- > 0) {
if (*mark && !SvGAMAGIC(*mark) && SvOK(*mark)) {
STRLEN tmplen;
SvPV_const(*mark, tmplen);
len += tmplen;
}
mark++;
}
SvGROW(sv, len + 1); /* so try to pre-extend */
mark = oldmark;
items = sp - mark;
++mark;
}
SvPVCLEAR(sv);
/* sv_setpv retains old UTF8ness [perl #24846] */
SvUTF8_off(sv);
if (TAINTING_get && SvMAGICAL(sv))
SvTAINTED_off(sv);
if (items-- > 0) {
if (*mark)
sv_catsv(sv, *mark);
mark++;
}
if (delimlen) {
const U32 delimflag = DO_UTF8(delim) ? SV_CATUTF8 : SV_CATBYTES;
for (; items > 0; items--,mark++) {
STRLEN len;
const char *s;
sv_catpvn_flags(sv,delims,delimlen,delimflag);
s = SvPV_const(*mark,len);
sv_catpvn_flags(sv,s,len,
DO_UTF8(*mark) ? SV_CATUTF8 : SV_CATBYTES);
}
}
else {
for (; items > 0; items--,mark++)
{
STRLEN len;
const char *s = SvPV_const(*mark,len);
sv_catpvn_flags(sv,s,len,
DO_UTF8(*mark) ? SV_CATUTF8 : SV_CATBYTES);
}
}
SvSETMAGIC(sv);
}
void
Perl_do_sprintf(pTHX_ SV *sv, SSize_t len, SV **sarg)
{
STRLEN patlen;
const char * const pat = SvPV_const(*sarg, patlen);
bool do_taint = FALSE;
PERL_ARGS_ASSERT_DO_SPRINTF;
assert(len >= 1);
if (SvTAINTED(*sarg))
TAINT_PROPER(
(PL_op && PL_op->op_type < OP_max)
? (PL_op->op_type == OP_PRTF)
? "printf"
: PL_op_name[PL_op->op_type]
: "(unknown)"
);
SvUTF8_off(sv);
if (DO_UTF8(*sarg))
SvUTF8_on(sv);
sv_vsetpvfn(sv, pat, patlen, NULL, sarg + 1, (Size_t)(len - 1), &do_taint);
SvSETMAGIC(sv);
if (do_taint)
SvTAINTED_on(sv);
}
/* currently converts input to bytes if possible, but doesn't sweat failure */
UV
Perl_do_vecget(pTHX_ SV *sv, STRLEN offset, int size)
{
STRLEN srclen, len, avail, uoffset, bitoffs = 0;
const I32 svpv_flags = ((PL_op->op_flags & OPf_MOD || LVRET)
? SV_UNDEF_RETURNS_NULL : 0);
unsigned char *s = (unsigned char *)
SvPV_flags(sv, srclen, (svpv_flags|SV_GMAGIC));
UV retnum = 0;
if (!s) {
s = (unsigned char *)"";
}
PERL_ARGS_ASSERT_DO_VECGET;
if (size < 1 || (size & (size-1))) /* size < 1 or not a power of two */
Perl_croak(aTHX_ "Illegal number of bits in vec");
if (SvUTF8(sv)) {
if (Perl_sv_utf8_downgrade(aTHX_ sv, TRUE)) {
/* PVX may have changed */
s = (unsigned char *) SvPV_flags(sv, srclen, svpv_flags);
}
else {
Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
"Use of strings with code points over 0xFF as"
" arguments to vec is deprecated. This will"
" be a fatal error in Perl 5.32");
}
}
if (size < 8) {
bitoffs = ((offset%8)*size)%8;
uoffset = offset/(8/size);
}
else if (size > 8) {
int n = size/8;
if (offset > Size_t_MAX / n - 1) /* would overflow */
return 0;
uoffset = offset*n;
}
else
uoffset = offset;
if (uoffset >= srclen)
return 0;
len = (bitoffs + size + 7)/8; /* required number of bytes */
avail = srclen - uoffset; /* available number of bytes */
/* Does the byte range overlap the end of the string? If so,
* handle specially. */
if (avail < len) {
if (size <= 8)
retnum = 0;
else {
if (size == 16) {
assert(avail == 1);
retnum = (UV) s[uoffset] << 8;
}
else if (size == 32) {
assert(avail >= 1 && avail <= 3);
if (avail == 1)
retnum =
((UV) s[uoffset ] << 24);
else if (avail == 2)
retnum =
((UV) s[uoffset ] << 24) +
((UV) s[uoffset + 1] << 16);
else
retnum =
((UV) s[uoffset ] << 24) +
((UV) s[uoffset + 1] << 16) +
( s[uoffset + 2] << 8);
}
#ifdef UV_IS_QUAD
else if (size == 64) {
Perl_ck_warner(aTHX_ packWARN(WARN_PORTABLE),
"Bit vector size > 32 non-portable");
assert(avail >= 1 && avail <= 7);
if (avail == 1)
retnum =
(UV) s[uoffset ] << 56;
else if (avail == 2)
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48);
else if (avail == 3)
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40);
else if (avail == 4)
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40) +
((UV) s[uoffset + 3] << 32);
else if (avail == 5)
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40) +
((UV) s[uoffset + 3] << 32) +
((UV) s[uoffset + 4] << 24);
else if (avail == 6)
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40) +
((UV) s[uoffset + 3] << 32) +
((UV) s[uoffset + 4] << 24) +
((UV) s[uoffset + 5] << 16);
else
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40) +
((UV) s[uoffset + 3] << 32) +
((UV) s[uoffset + 4] << 24) +
((UV) s[uoffset + 5] << 16) +
((UV) s[uoffset + 6] << 8);
}
#endif
}
}
else if (size < 8)
retnum = (s[uoffset] >> bitoffs) & ((1 << size) - 1);
else {
if (size == 8)
retnum = s[uoffset];
else if (size == 16)
retnum =
((UV) s[uoffset] << 8) +
s[uoffset + 1];
else if (size == 32)
retnum =
((UV) s[uoffset ] << 24) +
((UV) s[uoffset + 1] << 16) +
( s[uoffset + 2] << 8) +
s[uoffset + 3];
#ifdef UV_IS_QUAD
else if (size == 64) {
Perl_ck_warner(aTHX_ packWARN(WARN_PORTABLE),
"Bit vector size > 32 non-portable");
retnum =
((UV) s[uoffset ] << 56) +
((UV) s[uoffset + 1] << 48) +
((UV) s[uoffset + 2] << 40) +
((UV) s[uoffset + 3] << 32) +
((UV) s[uoffset + 4] << 24) +
((UV) s[uoffset + 5] << 16) +
( s[uoffset + 6] << 8) +
s[uoffset + 7];
}
#endif
}
return retnum;
}
/* currently converts input to bytes if possible but doesn't sweat failures,
* although it does ensure that the string it clobbers is not marked as
* utf8-valid any more
*/
void
Perl_do_vecset(pTHX_ SV *sv)
{
STRLEN offset, bitoffs = 0;
int size;
unsigned char *s;
UV lval;
I32 mask;
STRLEN targlen;
STRLEN len;
SV * const targ = LvTARG(sv);
char errflags = LvFLAGS(sv);
PERL_ARGS_ASSERT_DO_VECSET;
/* some out-of-range errors have been deferred if/until the LV is
* actually written to: f(vec($s,-1,8)) is not always fatal */
if (errflags) {
assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE)));
if (errflags & LVf_NEG_OFF)
Perl_croak_nocontext("Negative offset to vec in lvalue context");
Perl_croak_nocontext("Out of memory!");
}
if (!targ)
return;
s = (unsigned char*)SvPV_force_flags(targ, targlen,
SV_GMAGIC | SV_UNDEF_RETURNS_NULL);
if (SvUTF8(targ)) {
/* This is handled by the SvPOK_only below...
if (!Perl_sv_utf8_downgrade(aTHX_ targ, TRUE))
SvUTF8_off(targ);
*/
(void) Perl_sv_utf8_downgrade(aTHX_ targ, TRUE);
}
(void)SvPOK_only(targ);
lval = SvUV(sv);
offset = LvTARGOFF(sv);
size = LvTARGLEN(sv);
if (size < 1 || (size & (size-1))) /* size < 1 or not a power of two */
Perl_croak(aTHX_ "Illegal number of bits in vec");
if (size < 8) {
bitoffs = ((offset%8)*size)%8;
offset /= 8/size;
}
else if (size > 8) {
int n = size/8;
if (offset > Size_t_MAX / n - 1) /* would overflow */
Perl_croak_nocontext("Out of memory!");
offset *= n;
}
len = (bitoffs + size + 7)/8; /* required number of bytes */
if (targlen < offset || targlen - offset < len) {
STRLEN newlen = offset > Size_t_MAX - len - 1 ? /* avoid overflow */
Size_t_MAX : offset + len + 1;
s = (unsigned char*)SvGROW(targ, newlen);
(void)memzero((char *)(s + targlen), newlen - targlen);
SvCUR_set(targ, newlen - 1);
}
if (size < 8) {
mask = (1 << size) - 1;
lval &= mask;
s[offset] &= ~(mask << bitoffs);
s[offset] |= lval << bitoffs;
}
else {
if (size == 8)
s[offset ] = (U8)( lval & 0xff);
else if (size == 16) {
s[offset ] = (U8)((lval >> 8) & 0xff);
s[offset+1] = (U8)( lval & 0xff);
}
else if (size == 32) {
s[offset ] = (U8)((lval >> 24) & 0xff);
s[offset+1] = (U8)((lval >> 16) & 0xff);
s[offset+2] = (U8)((lval >> 8) & 0xff);
s[offset+3] = (U8)( lval & 0xff);
}
#ifdef UV_IS_QUAD
else if (size == 64) {
Perl_ck_warner(aTHX_ packWARN(WARN_PORTABLE),
"Bit vector size > 32 non-portable");
s[offset ] = (U8)((lval >> 56) & 0xff);
s[offset+1] = (U8)((lval >> 48) & 0xff);
s[offset+2] = (U8)((lval >> 40) & 0xff);
s[offset+3] = (U8)((lval >> 32) & 0xff);
s[offset+4] = (U8)((lval >> 24) & 0xff);
s[offset+5] = (U8)((lval >> 16) & 0xff);
s[offset+6] = (U8)((lval >> 8) & 0xff);
s[offset+7] = (U8)( lval & 0xff);
}
#endif
}
SvSETMAGIC(targ);
}
void
Perl_do_vop(pTHX_ I32 optype, SV *sv, SV *left, SV *right)
{
#ifdef LIBERAL
long *dl;
long *ll;
long *rl;
#endif
char *dc;
STRLEN leftlen;
STRLEN rightlen;
const char *lc;
const char *rc;
STRLEN len = 0;
STRLEN lensave;
const char *lsave;
const char *rsave;
STRLEN needlen = 0;
bool result_needs_to_be_utf8 = FALSE;
bool left_utf8 = FALSE;
bool right_utf8 = FALSE;
U8 * left_non_downgraded = NULL;
U8 * right_non_downgraded = NULL;
Size_t left_non_downgraded_len = 0;
Size_t right_non_downgraded_len = 0;
char * non_downgraded = NULL;
Size_t non_downgraded_len = 0;
PERL_ARGS_ASSERT_DO_VOP;
if (sv != left || (optype != OP_BIT_AND && !SvOK(sv)))
SvPVCLEAR(sv); /* avoid undef warning on |= and ^= */
if (sv == left) {
lc = SvPV_force_nomg(left, leftlen);
}
else {
lc = SvPV_nomg_const(left, leftlen);
SvPV_force_nomg_nolen(sv);
}
rc = SvPV_nomg_const(right, rightlen);
/* This needs to come after SvPV to ensure that string overloading has
fired off. */
/* Create downgraded temporaries of any UTF-8 encoded operands */
if (DO_UTF8(left)) {
const U8 * save_lc = (U8 *) lc;
left_utf8 = TRUE;
result_needs_to_be_utf8 = TRUE;
left_non_downgraded_len = leftlen;
lc = (char *) bytes_from_utf8_loc((const U8 *) lc, &leftlen,
&left_utf8,
(const U8 **) &left_non_downgraded);
/* Calculate the number of trailing unconvertible bytes. This quantity
* is the original length minus the length of the converted portion. */
left_non_downgraded_len -= left_non_downgraded - save_lc;
SAVEFREEPV(lc);
}
if (DO_UTF8(right)) {
const U8 * save_rc = (U8 *) rc;
right_utf8 = TRUE;
result_needs_to_be_utf8 = TRUE;
right_non_downgraded_len = rightlen;
rc = (char *) bytes_from_utf8_loc((const U8 *) rc, &rightlen,
&right_utf8,
(const U8 **) &right_non_downgraded);
right_non_downgraded_len -= right_non_downgraded - save_rc;
SAVEFREEPV(rc);
}
/* We set 'len' to the length that the operation actually operates on. The
* dangling part of the longer operand doesn't actually participate in the
* operation. What happens is that we pretend that the shorter operand has
* been extended to the right by enough imaginary zeros to match the length
* of the longer one. But we know in advance the result of the operation
* on zeros without having to do it. In the case of '&', the result is
* zero, and the dangling portion is simply discarded. For '|' and '^', the
* result is the same as the other operand, so the dangling part is just
* appended to the final result, unchanged. We currently accept above-FF
* code points in the dangling portion, as that's how it has long worked,
* and code depends on it staying that way. But it is now fatal for
* above-FF to appear in the portion that does get operated on. Hence, any
* above-FF must come only in the longer operand, and only in its dangling
* portion. That means that at least one of the operands has to be
* entirely non-UTF-8, and the length of that operand has to be before the
* first above-FF in the other */
if (left_utf8 || right_utf8) {
if (left_utf8) {
if (right_utf8 || rightlen > leftlen) {
Perl_croak(aTHX_ FATAL_ABOVE_FF_MSG, PL_op_desc[optype]);
}
len = rightlen;
}
else if (right_utf8) {
if (leftlen > rightlen) {
Perl_croak(aTHX_ FATAL_ABOVE_FF_MSG, PL_op_desc[optype]);
}
len = leftlen;
}
Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
DEPRECATED_ABOVE_FF_MSG, PL_op_desc[optype]);
}
else { /* Neither is UTF-8 */
len = MIN(leftlen, rightlen);
}
lensave = len;
lsave = lc;
rsave = rc;
SvCUR_set(sv, len);
(void)SvPOK_only(sv);
if (SvOK(sv) || SvTYPE(sv) > SVt_PVMG) {
dc = SvPV_force_nomg_nolen(sv);
if (SvLEN(sv) < len + 1) {
dc = SvGROW(sv, len + 1);
(void)memzero(dc + SvCUR(sv), len - SvCUR(sv) + 1);
}
}
else {
needlen = optype == OP_BIT_AND
? len : (leftlen > rightlen ? leftlen : rightlen);
Newxz(dc, needlen + 1, char);
sv_usepvn_flags(sv, dc, needlen, SV_HAS_TRAILING_NUL);
dc = SvPVX(sv); /* sv_usepvn() calls Renew() */
}
#ifdef LIBERAL
if (len >= sizeof(long)*4 &&
!((unsigned long)dc % sizeof(long)) &&
!((unsigned long)lc % sizeof(long)) &&
!((unsigned long)rc % sizeof(long))) /* It's almost always aligned... */
{
const STRLEN 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++;
*dc = '\0';
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) {
if (dc == rc)
SvCUR(sv) = rightlen;
else
sv_catpvn_nomg(sv, rsave + len, rightlen - len);
}
else if (leftlen > len) {
if (dc == lc)
SvCUR(sv) = leftlen;
else
sv_catpvn_nomg(sv, lsave + len, leftlen - len);
}
*SvEND(sv) = '\0';
/* If there is trailing stuff that couldn't be converted from UTF-8, it
* is appended as-is for the ^ and | operators. This preserves
* backwards compatibility */
if (right_non_downgraded) {
non_downgraded = (char *) right_non_downgraded;
non_downgraded_len = right_non_downgraded_len;
}
else if (left_non_downgraded) {
non_downgraded = (char *) left_non_downgraded;
non_downgraded_len = left_non_downgraded_len;
}
break;
}
if (result_needs_to_be_utf8) {
sv_utf8_upgrade_nomg(sv);
/* Append any trailing UTF-8 as-is. */
if (non_downgraded) {
sv_catpvn_nomg(sv, non_downgraded, non_downgraded_len);
}
}
SvTAINT(sv);
}
/* Perl_do_kv() may be:
* * called directly as the pp function for pp_keys() and pp_values();
* * It may also be called directly when the op is OP_AVHVSWITCH, to
* implement CORE::keys(), CORE::values().
*
* In all cases it expects an HV on the stack and returns a list of keys,
* values, or key-value pairs, depending on PL_op.
*/
OP *
Perl_do_kv(pTHX)
{
dSP;
HV * const keys = MUTABLE_HV(POPs);
const U8 gimme = GIMME_V;
const I32 dokeys = (PL_op->op_type == OP_KEYS)
|| ( PL_op->op_type == OP_AVHVSWITCH
&& (PL_op->op_private & OPpAVHVSWITCH_MASK)
+ OP_EACH == OP_KEYS);
const I32 dovalues = (PL_op->op_type == OP_VALUES)
|| ( PL_op->op_type == OP_AVHVSWITCH
&& (PL_op->op_private & OPpAVHVSWITCH_MASK)
+ OP_EACH == OP_VALUES);
assert( PL_op->op_type == OP_KEYS
|| PL_op->op_type == OP_VALUES
|| PL_op->op_type == OP_AVHVSWITCH);
assert(!( PL_op->op_type == OP_VALUES
&& (PL_op->op_private & OPpMAYBE_LVSUB)));
(void)hv_iterinit(keys); /* always reset iterator regardless */
if (gimme == G_VOID)
RETURN;
if (gimme == G_SCALAR) {
if (PL_op->op_flags & OPf_MOD || LVRET) { /* lvalue */
SV * const ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */
sv_magic(ret, NULL, PERL_MAGIC_nkeys, NULL, 0);
LvTYPE(ret) = 'k';
LvTARG(ret) = SvREFCNT_inc_simple(keys);
PUSHs(ret);
}
else {
IV i;
dTARGET;
/* note that in 'scalar(keys %h)' the OP_KEYS is usually
* optimised away and the action is performed directly by the
* padhv or rv2hv op. We now only get here via OP_AVHVSWITCH
* and \&CORE::keys
*/
if (! SvTIED_mg((const SV *)keys, PERL_MAGIC_tied) ) {
i = HvUSEDKEYS(keys);
}
else {
i = 0;
while (hv_iternext(keys)) i++;
}
PUSHi( i );
}
RETURN;
}
if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) {
const I32 flags = is_lvalue_sub();
if (flags && !(flags & OPpENTERSUB_INARGS))
/* diag_listed_as: Can't modify %s in %s */
Perl_croak(aTHX_ "Can't modify keys in list assignment");
}
PUTBACK;
hv_pushkv(keys, (dokeys | (dovalues << 1)));
return NORMAL;
}
/*
* ex: set ts=8 sts=4 sw=4 et:
*/
Reference in New Issue View Git Blame Copy Permalink