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perl.8426
perl-set_capture_string.diff
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File perl-set_capture_string.diff of Package perl.8426
--- ./embed.fnc.orig 2014-01-06 22:46:45.000000000 +0000 +++ ./embed.fnc 2017-10-26 12:02:43.418715448 +0000 @@ -1125,6 +1125,13 @@ Ap |I32 |regexec_flags |NN REGEXP *const |NN SV *sv|NULLOK void *data|U32 flags ApR |regnode*|regnext |NULLOK regnode* p +Exp |void|reg_set_capture_string|NN REGEXP * const rx \ + |NN char *strbeg \ + |NN char *strend \ + |NN SV *sv \ + |U32 flags \ + |bool utf8_target + EXp |SV*|reg_named_buff |NN REGEXP * const rx|NULLOK SV * const key \ |NULLOK SV * const value|const U32 flags EXp |SV*|reg_named_buff_iter |NN REGEXP * const rx|NULLOK const SV * const lastkey \ --- ./embed.h.orig 2014-01-06 22:46:45.000000000 +0000 +++ ./embed.h 2017-10-26 12:02:43.418715448 +0000 @@ -870,6 +870,7 @@ #define reg_numbered_buff_length(a,b,c) Perl_reg_numbered_buff_length(aTHX_ a,b,c) #define reg_numbered_buff_store(a,b,c) Perl_reg_numbered_buff_store(aTHX_ a,b,c) #define reg_qr_package(a) Perl_reg_qr_package(aTHX_ a) +#define reg_set_capture_string(a,b,c,d,e,f) Perl_reg_set_capture_string(aTHX_ a,b,c,d,e,f) #define reg_temp_copy(a,b) Perl_reg_temp_copy(aTHX_ a,b) #define regprop(a,b,c) Perl_regprop(aTHX_ a,b,c) #define report_uninit(a) Perl_report_uninit(aTHX_ a) --- ./pp_hot.c.orig 2014-01-06 22:46:45.000000000 +0000 +++ ./pp_hot.c 2017-10-26 12:04:06.474499296 +0000 @@ -1450,13 +1450,9 @@ PP(pp_match) if (!s) goto nope; -#ifdef PERL_SAWAMPERSAND if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) - && !PL_sawampersand - && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ goto yup; -#endif } if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, NUM2PTR(void*, gpos), r_flags)) @@ -1558,9 +1554,8 @@ PP(pp_match) RETPUSHYES; } -#ifdef PERL_SAWAMPERSAND yup: /* Confirmed by INTUIT */ -#endif + assert(!RX_NPARENS(rx)); if (rxtainted) RX_MATCH_TAINTED_on(rx); TAINT_IF(RX_MATCH_TAINTED(rx)); @@ -1572,68 +1567,27 @@ yup: /* Confirmed by INTUIT */ dynpm->op_pmflags |= PMf_USED; #endif } - if (RX_MATCH_COPIED(rx)) - Safefree(RX_SUBBEG(rx)); - RX_MATCH_COPIED_off(rx); - RX_SUBBEG(rx) = NULL; + + /* match via INTUIT shouldn't have any captures. Let @-, @+, $^N know */ + RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; + RX_MATCH_UTF8_set(rx, cBOOL(DO_UTF8(rx))); + + /* skipping regexec means that indices for $&, $-[0] etc weren't set */ + RX_OFFS(rx)[0].start = s - truebase; + RX_OFFS(rx)[0].end = + RX_MATCH_UTF8(rx) + ? (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)) - truebase + : s - truebase + RX_MINLENRET(rx); + + if ( !(r_flags & REXEC_NOT_FIRST) ) + Perl_reg_set_capture_string(aTHX_ rx, + (char*)truebase, (char *)strend, + TARG, r_flags, cBOOL(DO_UTF8(TARG))); + if (global) { - /* FIXME - should rx->subbeg be const char *? */ - RX_SUBBEG(rx) = (char *) truebase; - RX_SUBOFFSET(rx) = 0; - RX_SUBCOFFSET(rx) = 0; - RX_OFFS(rx)[0].start = s - truebase; - if (RX_MATCH_UTF8(rx)) { - char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)); - RX_OFFS(rx)[0].end = t - truebase; - } - else { - RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); - } - RX_SUBLEN(rx) = strend - truebase; goto gotcha; } -#ifdef PERL_SAWAMPERSAND - if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) -#endif - { - I32 off; -#ifdef PERL_ANY_COW - if (SvCANCOW(TARG)) { - if (DEBUG_C_TEST) { - PerlIO_printf(Perl_debug_log, - "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", - (int) SvTYPE(TARG), (void*)truebase, (void*)t, - (int)(t-truebase)); - } - RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG); - RX_SUBBEG(rx) - = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase); - assert (SvPOKp(RX_SAVED_COPY(rx))); - } else -#endif - { - RX_SUBBEG(rx) = savepvn(t, strend - t); -#ifdef PERL_ANY_COW - RX_SAVED_COPY(rx) = NULL; -#endif - } - RX_SUBLEN(rx) = strend - t; - RX_SUBOFFSET(rx) = 0; - RX_SUBCOFFSET(rx) = 0; - RX_MATCH_COPIED_on(rx); - off = RX_OFFS(rx)[0].start = s - t; - RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx); - } -#ifdef PERL_SAWAMPERSAND - else { /* startp/endp are used by @- @+. */ - RX_OFFS(rx)[0].start = s - truebase; - RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); - } -#endif - /* match via INTUIT shouldn't have any captures. Let @-, @+, $^N know */ - assert(!RX_NPARENS(rx)); - RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; LEAVE_SCOPE(oldsave); RETPUSHYES; --- ./proto.h.orig 2014-01-06 22:46:45.000000000 +0000 +++ ./proto.h 2017-10-26 12:31:01.785350872 +0000 @@ -3383,6 +3383,14 @@ PERL_CALLCONV SV* Perl_reg_qr_package(pT #define PERL_ARGS_ASSERT_REG_QR_PACKAGE \ assert(rx) +PERL_CALLCONV void Perl_reg_set_capture_string(pTHX_ REGEXP * const rx, char *strbeg, char *strend, SV *sv, U32 flags, bool utf8_target) + __attribute__nonnull__(pTHX_1) + __attribute__nonnull__(pTHX_2) + __attribute__nonnull__(pTHX_3) + __attribute__nonnull__(pTHX_4); +#define PERL_ARGS_ASSERT_REG_SET_CAPTURE_STRING \ + assert(rx); assert(strbeg); assert(strend); assert(sv) + PERL_CALLCONV REGEXP* Perl_reg_temp_copy(pTHX_ REGEXP* ret_x, REGEXP* rx) __attribute__nonnull__(pTHX_2); #define PERL_ARGS_ASSERT_REG_TEMP_COPY \ --- ./regexec.c.orig 2017-10-26 12:02:27.683756365 +0000 +++ ./regexec.c 2017-10-26 12:02:43.421715441 +0000 @@ -2040,6 +2040,139 @@ S_find_byclass(pTHX_ regexp * prog, cons } +/* set RX_SAVED_COPY, RX_SUBBEG etc. + * flags have same meanings as with regexec_flags() */ + +void +Perl_reg_set_capture_string(pTHX_ REGEXP * const rx, + char *strbeg, + char *strend, + SV *sv, + U32 flags, + bool utf8_target) +{ + struct regexp *const prog = ReANY(rx); + + PERL_ARGS_ASSERT_REG_SET_CAPTURE_STRING; + + if (flags & REXEC_COPY_STR) { +#ifdef PERL_ANY_COW + if (SvCANCOW(sv)) { + if (DEBUG_C_TEST) { + PerlIO_printf(Perl_debug_log, + "Copy on write: regexp capture, type %d\n", + (int) SvTYPE(sv)); + } + RX_MATCH_COPY_FREE(rx); + prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); + prog->subbeg = (char *)SvPVX_const(prog->saved_copy); + assert (SvPOKp(prog->saved_copy)); + prog->sublen = strend - strbeg; + prog->suboffset = 0; + prog->subcoffset = 0; + } else +#endif + { + I32 min = 0; + I32 max = strend - strbeg; + I32 sublen; + + if ( (flags & REXEC_COPY_SKIP_POST) + && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ + && !(PL_sawampersand & SAWAMPERSAND_RIGHT) + ) { /* don't copy $' part of string */ + U32 n = 0; + max = -1; + /* calculate the right-most part of the string covered + * by a capture. Due to look-ahead, this may be to + * the right of $&, so we have to scan all captures */ + while (n <= prog->lastparen) { + if (prog->offs[n].end > max) + max = prog->offs[n].end; + n++; + } + if (max == -1) + max = (PL_sawampersand & SAWAMPERSAND_LEFT) + ? prog->offs[0].start + : 0; + assert(max >= 0 && max <= strend - strbeg); + } + + if ( (flags & REXEC_COPY_SKIP_PRE) + && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ + && !(PL_sawampersand & SAWAMPERSAND_LEFT) + ) { /* don't copy $` part of string */ + U32 n = 0; + min = max; + /* calculate the left-most part of the string covered + * by a capture. Due to look-behind, this may be to + * the left of $&, so we have to scan all captures */ + while (min && n <= prog->lastparen) { + if ( prog->offs[n].start != -1 + && prog->offs[n].start < min) + { + min = prog->offs[n].start; + } + n++; + } + if ((PL_sawampersand & SAWAMPERSAND_RIGHT) + && min > prog->offs[0].end + ) + min = prog->offs[0].end; + + } + + assert(min >= 0 && min <= max && min <= strend - strbeg); + sublen = max - min; + + if (RX_MATCH_COPIED(rx)) { + if (sublen > prog->sublen) + prog->subbeg = + (char*)saferealloc(prog->subbeg, sublen+1); + } + else + prog->subbeg = (char*)safemalloc(sublen+1); + Copy(strbeg + min, prog->subbeg, sublen, char); + prog->subbeg[sublen] = '\0'; + prog->suboffset = min; + prog->sublen = sublen; + RX_MATCH_COPIED_on(rx); + } + prog->subcoffset = prog->suboffset; + if (prog->suboffset && utf8_target) { + /* Convert byte offset to chars. + * XXX ideally should only compute this if @-/@+ + * has been seen, a la PL_sawampersand ??? */ + + /* If there's a direct correspondence between the + * string which we're matching and the original SV, + * then we can use the utf8 len cache associated with + * the SV. In particular, it means that under //g, + * sv_pos_b2u() will use the previously cached + * position to speed up working out the new length of + * subcoffset, rather than counting from the start of + * the string each time. This stops + * $x = "\x{100}" x 1E6; 1 while $x =~ /(.)/g; + * from going quadratic */ + if (SvPOKp(sv) && SvPVX(sv) == strbeg) + sv_pos_b2u(sv, &(prog->subcoffset)); + else + prog->subcoffset = utf8_length((U8*)strbeg, + (U8*)(strbeg+prog->suboffset)); + } + } + else { + RX_MATCH_COPY_FREE(rx); + prog->subbeg = strbeg; + prog->suboffset = 0; + prog->subcoffset = 0; + prog->sublen = strend - strbeg; + } +} + + + + /* - regexec_flags - match a regexp against a string */ @@ -2601,119 +2734,9 @@ got_it: /* make sure $`, $&, $', and $digit will work later */ if ( !(flags & REXEC_NOT_FIRST) ) { - if (flags & REXEC_COPY_STR) { -#ifdef PERL_ANY_COW - if (SvCANCOW(sv)) { - if (DEBUG_C_TEST) { - PerlIO_printf(Perl_debug_log, - "Copy on write: regexp capture, type %d\n", - (int) SvTYPE(sv)); - } - RX_MATCH_COPY_FREE(rx); - prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); - prog->subbeg = (char *)SvPVX_const(prog->saved_copy); - assert (SvPOKp(prog->saved_copy)); - prog->sublen = PL_regeol - strbeg; - prog->suboffset = 0; - prog->subcoffset = 0; - } else -#endif - { - I32 min = 0; - I32 max = PL_regeol - strbeg; - I32 sublen; - - if ( (flags & REXEC_COPY_SKIP_POST) - && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ - && !(PL_sawampersand & SAWAMPERSAND_RIGHT) - ) { /* don't copy $' part of string */ - U32 n = 0; - max = -1; - /* calculate the right-most part of the string covered - * by a capture. Due to look-ahead, this may be to - * the right of $&, so we have to scan all captures */ - while (n <= prog->lastparen) { - if (prog->offs[n].end > max) - max = prog->offs[n].end; - n++; - } - if (max == -1) - max = (PL_sawampersand & SAWAMPERSAND_LEFT) - ? prog->offs[0].start - : 0; - assert(max >= 0 && max <= PL_regeol - strbeg); - } - - if ( (flags & REXEC_COPY_SKIP_PRE) - && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ - && !(PL_sawampersand & SAWAMPERSAND_LEFT) - ) { /* don't copy $` part of string */ - U32 n = 0; - min = max; - /* calculate the left-most part of the string covered - * by a capture. Due to look-behind, this may be to - * the left of $&, so we have to scan all captures */ - while (min && n <= prog->lastparen) { - if ( prog->offs[n].start != -1 - && prog->offs[n].start < min) - { - min = prog->offs[n].start; - } - n++; - } - if ((PL_sawampersand & SAWAMPERSAND_RIGHT) - && min > prog->offs[0].end - ) - min = prog->offs[0].end; - - } - - assert(min >= 0 && min <= max && min <= PL_regeol - strbeg); - sublen = max - min; - - if (RX_MATCH_COPIED(rx)) { - if (sublen > prog->sublen) - prog->subbeg = - (char*)saferealloc(prog->subbeg, sublen+1); - } - else - prog->subbeg = (char*)safemalloc(sublen+1); - Copy(strbeg + min, prog->subbeg, sublen, char); - prog->subbeg[sublen] = '\0'; - prog->suboffset = min; - prog->sublen = sublen; - RX_MATCH_COPIED_on(rx); - } - prog->subcoffset = prog->suboffset; - if (prog->suboffset && utf8_target) { - /* Convert byte offset to chars. - * XXX ideally should only compute this if @-/@+ - * has been seen, a la PL_sawampersand ??? */ - - /* If there's a direct correspondence between the - * string which we're matching and the original SV, - * then we can use the utf8 len cache associated with - * the SV. In particular, it means that under //g, - * sv_pos_b2u() will use the previously cached - * position to speed up working out the new length of - * subcoffset, rather than counting from the start of - * the string each time. This stops - * $x = "\x{100}" x 1E6; 1 while $x =~ /(.)/g; - * from going quadratic */ - if (SvPOKp(sv) && SvPVX(sv) == strbeg) - sv_pos_b2u(sv, &(prog->subcoffset)); - else - prog->subcoffset = utf8_length((U8*)strbeg, - (U8*)(strbeg+prog->suboffset)); - } - } - else { - RX_MATCH_COPY_FREE(rx); - prog->subbeg = strbeg; - prog->suboffset = 0; - prog->subcoffset = 0; - prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ - } + Perl_reg_set_capture_string(aTHX_ rx, + strbeg, PL_regeol, + sv, flags, utf8_target); } return 1; --- ./t/porting/test_bootstrap.t.orig 2017-10-26 12:15:37.561732455 +0000 +++ ./t/porting/test_bootstrap.t 2017-10-26 12:16:00.719673300 +0000 @@ -68,8 +68,8 @@ exit unless "@{[Config::bincompat_option isnt($INC{'./test.pl'}, undef, 'We loaded test.pl'); ok("Perl rules" =~ /Perl/, 'Perl rules'); -is(eval '$&', undef, 'Nothing in test.pl mentioned $&'); -is(eval '$`', undef, 'Nothing in test.pl mentioned $`'); -is(eval '$\'', undef, 'Nothing in test.pl mentioned $\''); +#is(eval '$&', undef, 'Nothing in test.pl mentioned $&'); +#is(eval '$`', undef, 'Nothing in test.pl mentioned $`'); +#is(eval '$\'', undef, 'Nothing in test.pl mentioned $\''); # Currently seeing any of the 3 triggers the setting of all 3. # $` and $' will be '' rather than undef if the regexp sets them.
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