#if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING)
# define DEBUGGING
#endif
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
START_EXTERN_C
extern regexp* my_regcomp (pTHX_ char* exp, char* xend, PMOP* pm);
extern I32 my_regexec (pTHX_ regexp* 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,
struct re_scream_pos_data_s *data);
extern SV* my_re_intuit_string (pTHX_ regexp *prog);
END_EXTERN_C
/* engine details need to be paired - non debugging, debuggin */
#define NEEDS_DEBUGGING 0x01
struct regexp_engine {
regexp* (*regcomp) (pTHX_ char* exp, char* xend, PMOP* pm);
I32 (*regexec) (pTHX_ regexp* prog, char* stringarg, char* strend,
char* strbeg, I32 minend, SV* screamer,
void* data, U32 flags);
char* (*re_intuit_start) (pTHX_ regexp *prog, SV *sv, char *strpos,
char *strend, U32 flags,
struct re_scream_pos_data_s *data);
SV* (*re_intuit_string) (pTHX_ regexp *prog);
void (*regfree) (pTHX_ struct regexp* r);
};
struct regexp_engine engines[] = {
{ Perl_pregcomp, Perl_regexec_flags, Perl_re_intuit_start,
Perl_re_intuit_string, Perl_pregfree },
{ my_regcomp, my_regexec, my_re_intuit_start, my_re_intuit_string,
my_regfree }
};
#define MY_CXT_KEY "re::_guts" XS_VERSION
typedef struct {
int x_oldflag; /* debug flag */
unsigned int x_state;
} my_cxt_t;
START_MY_CXT
#define oldflag (MY_CXT.x_oldflag)
static void
install(pTHX_ unsigned int new_state)
{
dMY_CXT;
const unsigned int states
= sizeof(engines) / sizeof(struct regexp_engine) -1;
if(new_state == MY_CXT.x_state)
return;
if (new_state > states) {
Perl_croak(aTHX_ "panic: re::install state %u is illegal - max is %u",
new_state, states);
}
PL_regexecp = engines[new_state].regexec;
PL_regcompp = engines[new_state].regcomp;
PL_regint_start = engines[new_state].re_intuit_start;
PL_regint_string = engines[new_state].re_intuit_string;
PL_regfree = engines[new_state].regfree;
if (new_state & NEEDS_DEBUGGING) {
PL_colorset = 0; /* Allow reinspection of ENV. */
if (!(MY_CXT.x_state & NEEDS_DEBUGGING)) {
/* Debugging is turned on for the first time. */
oldflag = PL_debug & DEBUG_r_FLAG;
PL_debug |= DEBUG_r_FLAG;
}
} else {
if (!(MY_CXT.x_state & NEEDS_DEBUGGING)) {
if (!oldflag)
PL_debug &= ~DEBUG_r_FLAG;
}
}
MY_CXT.x_state = new_state;
}
MODULE = re PACKAGE = re
BOOT:
{
MY_CXT_INIT;
}
void
install(new_state)
unsigned int new_state;
CODE:
install(aTHX_ new_state);