#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
+#include "re_comp.h"
-extern regexp* my_regcomp (pTHX_ char* exp, char* xend, PMOP* pm);
-extern I32 my_regexec (pTHX_ regexp* prog, char* stringarg, char* strend,
+
+START_EXTERN_C
+
+extern REGEXP* my_re_compile (pTHX_ const SV * const pattern, const U32 pm_flags);
+extern I32 my_regexec (pTHX_ REGEXP * const prog, char* stringarg, char* strend,
char* strbeg, I32 minend, SV* screamer,
void* data, U32 flags);
-extern void my_regfree (pTHX_ struct regexp* r);
-extern char* my_re_intuit_start (pTHX_ regexp *prog, SV *sv, char *strpos,
- char *strend, U32 flags,
+
+extern char* my_re_intuit_start (pTHX_ REGEXP * const prog, SV *sv, char *strpos,
+ char *strend, const U32 flags,
struct re_scream_pos_data_s *data);
-extern SV* my_re_intuit_string (pTHX_ regexp *prog);
+extern SV* my_re_intuit_string (pTHX_ REGEXP * const prog);
-#define MY_CXT_KEY "re::_guts" XS_VERSION
+extern void my_regfree (pTHX_ REGEXP * const r);
-typedef struct {
- int x_oldflag; /* debug flag */
-} my_cxt_t;
+extern void my_reg_numbered_buff_fetch(pTHX_ REGEXP * const rx, const I32 paren,
+ SV * const usesv);
+extern void my_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
+ SV const * const value);
+extern I32 my_reg_numbered_buff_length(pTHX_ REGEXP * const rx,
+ const SV * const sv, const I32 paren);
-START_MY_CXT
+extern SV* my_reg_named_buff(pTHX_ REGEXP * const, SV * const, SV * const,
+ const U32);
+extern SV* my_reg_named_buff_iter(pTHX_ REGEXP * const rx,
+ const SV * const lastkey, const U32 flags);
-#define oldflag (MY_CXT.x_oldflag)
+extern SV* my_reg_qr_package(pTHX_ REGEXP * const rx);
+#if defined(USE_ITHREADS)
+extern void* my_regdupe (pTHX_ REGEXP * const r, CLONE_PARAMS *param);
+#endif
-static void
-uninstall(pTHX)
-{
- dMY_CXT;
- PL_regexecp = Perl_regexec_flags;
- PL_regcompp = Perl_pregcomp;
- PL_regint_start = Perl_re_intuit_start;
- PL_regint_string = Perl_re_intuit_string;
- PL_regfree = Perl_pregfree;
-
- if (!oldflag)
- PL_debug &= ~DEBUG_r_FLAG;
-}
+EXTERN_C const struct regexp_engine my_reg_engine;
-static void
-install(pTHX)
-{
- dMY_CXT;
- PL_colorset = 0; /* Allow reinspection of ENV. */
- PL_regexecp = &my_regexec;
- PL_regcompp = &my_regcomp;
- PL_regint_start = &my_re_intuit_start;
- PL_regint_string = &my_re_intuit_string;
- PL_regfree = &my_regfree;
- oldflag = PL_debug & DEBUG_r_FLAG;
- PL_debug |= DEBUG_r_FLAG;
+END_EXTERN_C
+
+const struct regexp_engine my_reg_engine = {
+ my_re_compile,
+ my_regexec,
+ my_re_intuit_start,
+ my_re_intuit_string,
+ my_regfree,
+ my_reg_numbered_buff_fetch,
+ my_reg_numbered_buff_store,
+ my_reg_numbered_buff_length,
+ my_reg_named_buff,
+ my_reg_named_buff_iter,
+ my_reg_qr_package,
+#if defined(USE_ITHREADS)
+ my_regdupe
+#endif
+};
+
+REGEXP *
+get_re_arg( pTHX_ SV *sv, U32 flags, MAGIC **mgp) {
+ MAGIC *mg;
+ if (sv) {
+ if (SvMAGICAL(sv))
+ mg_get(sv);
+ if (SvROK(sv) &&
+ (sv = (SV*)SvRV(sv)) && /* assign deliberate */
+ SvTYPE(sv) == SVt_PVMG &&
+ (mg = mg_find(sv, PERL_MAGIC_qr))) /* assign deliberate */
+ {
+ if (mgp) *mgp = mg;
+ return (REGEXP *)mg->mg_obj;
+ }
+ }
+ if (mgp) *mgp = NULL;
+ return ((flags && PL_curpm) ? PM_GETRE(PL_curpm) : NULL);
}
MODULE = re PACKAGE = re
-BOOT:
+void
+install()
+ PPCODE:
+ PL_colorset = 0; /* Allow reinspection of ENV. */
+ /* PL_debug |= DEBUG_r_FLAG; */
+ XPUSHs(sv_2mortal(newSViv(PTR2IV(&my_reg_engine))));
+
+
+void
+regexp_pattern(sv)
+ SV * sv
+PROTOTYPE: $
+PREINIT:
+ MAGIC *mg;
+ REGEXP *re;
+PPCODE:
{
- MY_CXT_INIT;
+ /*
+ Checks if a reference is a regex or not. If the parameter is
+ not a ref, or is not the result of a qr// then returns false
+ in scalar context and an empty list in list context.
+ Otherwise in list context it returns the pattern and the
+ modifiers, in scalar context it returns the pattern just as it
+ would if the qr// was stringified normally, regardless as
+ to the class of the variable and any strigification overloads
+ on the object.
+ */
+
+ if ( re = get_re_arg( aTHX_ sv, 0, &mg) ) /* assign deliberate */
+ {
+ /* Housten, we have a regex! */
+ SV *pattern;
+ STRLEN patlen = 0;
+ STRLEN left = 0;
+ char reflags[6];
+
+ if ( GIMME_V == G_ARRAY ) {
+ /*
+ we are in list context so stringify
+ the modifiers that apply. We ignore "negative
+ modifiers" in this scenario.
+ */
+
+ char *fptr = INT_PAT_MODS;
+ char ch;
+ U16 match_flags = (U16)((re->extflags & PMf_COMPILETIME) >> 12);
+
+ while((ch = *fptr++)) {
+ if(match_flags & 1) {
+ reflags[left++] = ch;
+ }
+ match_flags >>= 1;
+ }
+
+ pattern = sv_2mortal(newSVpvn(re->precomp,re->prelen));
+ if (re->extflags & RXf_UTF8) SvUTF8_on(pattern);
+
+ /* return the pattern and the modifiers */
+ XPUSHs(pattern);
+ XPUSHs(sv_2mortal(newSVpvn(reflags,left)));
+ XSRETURN(2);
+ } else {
+ /* Scalar, so use the string that Perl would return */
+ /* return the pattern in (?msix:..) format */
+ pattern = sv_2mortal(newSVpvn(re->wrapped,re->wraplen));
+ if (re->extflags & RXf_UTF8)
+ SvUTF8_on(pattern);
+ XPUSHs(pattern);
+ XSRETURN(1);
+ }
+ } else {
+ /* It ain't a regexp folks */
+ if ( GIMME_V == G_ARRAY ) {
+ /* return the empty list */
+ XSRETURN_UNDEF;
+ } else {
+ /* Because of the (?:..) wrapping involved in a
+ stringified pattern it is impossible to get a
+ result for a real regexp that would evaluate to
+ false. Therefore we can return PL_sv_no to signify
+ that the object is not a regex, this means that one
+ can say
+
+ if (regex($might_be_a_regex) eq '(?:foo)') { }
+
+ and not worry about undefined values.
+ */
+ XSRETURN_NO;
+ }
+ }
+ /* NOT-REACHED */
}
void
-install()
- CODE:
- install(aTHX);
+regmust(sv)
+ SV * sv
+PROTOTYPE: $
+PREINIT:
+ REGEXP *re;
+PPCODE:
+{
+ if ( re = get_re_arg( aTHX_ sv, 0, 0) ) /* assign deliberate */
+ {
+ SV *an = &PL_sv_no;
+ SV *fl = &PL_sv_no;
+ if (re->anchored_substr) {
+ an = newSVsv(re->anchored_substr);
+ } else if (re->anchored_utf8) {
+ an = newSVsv(re->anchored_utf8);
+ }
+ if (re->float_substr) {
+ fl = newSVsv(re->float_substr);
+ } else if (re->float_utf8) {
+ fl = newSVsv(re->float_utf8);
+ }
+ XPUSHs(an);
+ XPUSHs(fl);
+ XSRETURN(2);
+ }
+ XSRETURN_UNDEF;
+}
-void
-uninstall()
- CODE:
- uninstall(aTHX);
https://perl5.git.perl.org / perl5.git / blobdiff