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#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "hook_op_check.h"
#undef printf
#include "stolen_chunk_of_toke.c"
#include <stdio.h>
#include <string.h>
#define PERL_VERSION_DECIMAL(r,v,s) (r*1000000 + v*1000 + s)
#define PERL_DECIMAL_VERSION \
PERL_VERSION_DECIMAL(PERL_REVISION,PERL_VERSION,PERL_SUBVERSION)
#define PERL_VERSION_GE(r,v,s) \
(PERL_DECIMAL_VERSION >= PERL_VERSION_DECIMAL(r,v,s))
#ifndef Newx
# define Newx(v,n,t) New(0,v,n,t)
#endif /* !Newx */
#define DD_DEBUGf_UPDATED_LINESTR 1
#define DD_DEBUGf_TRACE 2
#define DD_DEBUG_UPDATED_LINESTR (dd_debug & DD_DEBUGf_UPDATED_LINESTR)
#define DD_DEBUG_TRACE (dd_debug & DD_DEBUGf_TRACE)
static int dd_debug = 0;
#define DD_CONST_VIA_RV2CV PERL_VERSION_GE(5,11,2)
#define LEX_NORMAL 10
#define LEX_INTERPNORMAL 9
/* flag to trigger removal of temporary declaree sub */
static int in_declare = 0;
/* in 5.10, PL_parser will be NULL if we aren't parsing, and PL_lex_stuff
is a lookup into it - so if anything else we can use to tell, so we
need to be a bit more careful if PL_parser exists */
#define DD_AM_LEXING_CHECK (PL_lex_state == LEX_NORMAL || PL_lex_state == LEX_INTERPNORMAL)
#if defined(PL_parser) || defined(PERL_5_9_PLUS)
#define DD_HAVE_PARSER PL_parser
#define DD_HAVE_LEX_STUFF (PL_parser && PL_lex_stuff)
#define DD_AM_LEXING (PL_parser && DD_AM_LEXING_CHECK)
#else
#define DD_HAVE_PARSER 1
#define DD_HAVE_LEX_STUFF PL_lex_stuff
#define DD_AM_LEXING DD_AM_LEXING_CHECK
#endif
/* thing that decides whether we're dealing with a declarator */
int dd_is_declarator(pTHX_ char* name) {
HV* is_declarator;
SV** is_declarator_pack_ref;
HV* is_declarator_pack_hash;
SV** is_declarator_flag_ref;
int dd_flags;
is_declarator = get_hv("Devel::Declare::declarators", FALSE);
if (!is_declarator)
return -1;
/* $declarators{$current_package_name} */
if (!HvNAME(PL_curstash))
return -1;
is_declarator_pack_ref = hv_fetch(is_declarator, HvNAME(PL_curstash),
strlen(HvNAME(PL_curstash)), FALSE);
if (!is_declarator_pack_ref || !SvROK(*is_declarator_pack_ref))
return -1; /* not a hashref */
is_declarator_pack_hash = (HV*) SvRV(*is_declarator_pack_ref);
/* $declarators{$current_package_name}{$name} */
is_declarator_flag_ref = hv_fetch(
is_declarator_pack_hash, name,
strlen(name), FALSE
);
/* requires SvIOK as well as TRUE since flags not being an int is useless */
if (!is_declarator_flag_ref
|| !SvIOK(*is_declarator_flag_ref)
|| !SvTRUE(*is_declarator_flag_ref))
return -1;
dd_flags = SvIVX(*is_declarator_flag_ref);
return dd_flags;
}
/* callback thingy */
void dd_linestr_callback (pTHX_ char* type, char* name) {
char* linestr = SvPVX(PL_linestr);
int offset = PL_bufptr - linestr;
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv(type, 0)));
XPUSHs(sv_2mortal(newSVpv(name, 0)));
XPUSHs(sv_2mortal(newSViv(offset)));
PUTBACK;
call_pv("Devel::Declare::linestr_callback", G_VOID|G_DISCARD);
FREETMPS;
LEAVE;
}
char* dd_get_linestr(pTHX) {
if (!DD_HAVE_PARSER) {
return NULL;
}
return SvPVX(PL_linestr);
}
void dd_set_linestr(pTHX_ char* new_value) {
unsigned int new_len = strlen(new_value);
if (SvLEN(PL_linestr) < new_len) {
croak("PL_linestr not long enough, was Devel::Declare loaded soon enough in %s",
CopFILE(&PL_compiling)
);
}
memcpy(SvPVX(PL_linestr), new_value, new_len+1);
SvCUR_set(PL_linestr, new_len);
PL_bufend = SvPVX(PL_linestr) + new_len;
if ( DD_DEBUG_UPDATED_LINESTR && PERLDB_LINE && PL_curstash != PL_debstash) {
// Cribbed from toke.c
SV * const sv = NEWSV(85,0);
sv_upgrade(sv, SVt_PVMG);
sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
(void)SvIOK_on(sv);
SvIV_set(sv, 0);
av_store(CopFILEAV(&PL_compiling),(I32)CopLINE(&PL_compiling),sv);
}
}
char* dd_get_lex_stuff(pTHX) {
return (DD_HAVE_LEX_STUFF ? SvPVX(PL_lex_stuff) : "");
}
void dd_clear_lex_stuff(pTHX) {
if (DD_HAVE_PARSER)
PL_lex_stuff = (SV*)NULL;
}
char* dd_get_curstash_name(pTHX) {
return HvNAME(PL_curstash);
}
int dd_get_linestr_offset(pTHX) {
char* linestr;
if (!DD_HAVE_PARSER) {
return -1;
}
linestr = SvPVX(PL_linestr);
return PL_bufptr - linestr;
}
char* dd_move_past_token (pTHX_ char* s) {
/*
* buffer will be at the beginning of the declarator, -unless- the
* declarator is at EOL in which case it'll be the next useful line
* so we don't short-circuit out if we don't find the declarator
*/
while (s < PL_bufend && isSPACE(*s)) s++;
if (memEQ(s, PL_tokenbuf, strlen(PL_tokenbuf)))
s += strlen(PL_tokenbuf);
return s;
}
int dd_toke_move_past_token (pTHX_ int offset) {
char* base_s = SvPVX(PL_linestr) + offset;
char* s = dd_move_past_token(aTHX_ base_s);
return s - base_s;
}
int dd_toke_scan_word(pTHX_ int offset, int handle_package) {
char tmpbuf[sizeof PL_tokenbuf];
char* base_s = SvPVX(PL_linestr) + offset;
STRLEN len;
char* s = scan_word(base_s, tmpbuf, sizeof tmpbuf, handle_package, &len);
return s - base_s;
}
int dd_toke_scan_ident(pTHX_ int offset) {
char tmpbuf[sizeof PL_tokenbuf];
char* base_s = SvPVX(PL_linestr) + offset;
char* s = scan_ident(base_s, PL_bufend, tmpbuf, sizeof tmpbuf, 0);
return s - base_s;
}
int dd_toke_scan_str(pTHX_ int offset) {
STRLEN remaining = sv_len(PL_linestr) - offset;
SV* line_copy = newSVsv(PL_linestr);
char* base_s = SvPVX(PL_linestr) + offset;
char* s = scan_str(base_s, FALSE, FALSE);
if (s != base_s && sv_len(PL_lex_stuff) > remaining) {
int ret = (s - SvPVX(PL_linestr)) + remaining;
sv_catsv(line_copy, PL_linestr);
dd_set_linestr(aTHX_ SvPV_nolen(line_copy));
SvREFCNT_dec(line_copy);
return ret;
}
return s - base_s;
}
int dd_toke_skipspace(pTHX_ int offset) {
char* base_s = SvPVX(PL_linestr) + offset;
char* s = skipspace_force(base_s);
return s - base_s;
}
static void call_done_declare(pTHX) {
dSP;
if (DD_DEBUG_TRACE) {
printf("Deconstructing declare\n");
printf("PL_bufptr: %s\n", PL_bufptr);
printf("bufend at: %i\n", PL_bufend - PL_bufptr);
printf("linestr: %s\n", SvPVX(PL_linestr));
printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
}
ENTER;
SAVETMPS;
PUSHMARK(SP);
call_pv("Devel::Declare::done_declare", G_VOID|G_DISCARD);
FREETMPS;
LEAVE;
if (DD_DEBUG_TRACE) {
printf("PL_bufptr: %s\n", PL_bufptr);
printf("bufend at: %i\n", PL_bufend - PL_bufptr);
printf("linestr: %s\n", SvPVX(PL_linestr));
printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
printf("actual len: %i\n", strlen(PL_bufptr));
}
}
static int dd_handle_const(pTHX_ char *name);
/* replacement PL_check rv2cv entry */
STATIC OP *dd_ck_rv2cv(pTHX_ OP *o, void *user_data) {
OP* kid;
int dd_flags;
PERL_UNUSED_VAR(user_data);
if (in_declare) {
call_done_declare(aTHX);
return o;
}
kid = cUNOPo->op_first;
if (kid->op_type != OP_GV) /* not a GV so ignore */
return o;
if (!DD_AM_LEXING)
return o; /* not lexing? */
if (DD_DEBUG_TRACE) {
printf("Checking GV %s -> %s\n", HvNAME(GvSTASH(kGVOP_gv)), GvNAME(kGVOP_gv));
}
dd_flags = dd_is_declarator(aTHX_ GvNAME(kGVOP_gv));
if (dd_flags == -1)
return o;
if (DD_DEBUG_TRACE) {
printf("dd_flags are: %i\n", dd_flags);
printf("PL_tokenbuf: %s\n", PL_tokenbuf);
}
#if DD_CONST_VIA_RV2CV
if (PL_expect != XOPERATOR) {
if (!dd_handle_const(aTHX_ GvNAME(kGVOP_gv)))
return o;
CopLINE(PL_curcop) = PL_copline;
/* The parser behaviour that we're simulating depends on what comes
after the declarator. */
if (*skipspace(PL_bufptr + strlen(GvNAME(kGVOP_gv))) != '(') {
if (in_declare) {
call_done_declare(aTHX);
} else {
dd_linestr_callback(aTHX_ "rv2cv", GvNAME(kGVOP_gv));
}
}
return o;
}
#endif /* DD_CONST_VIA_RV2CV */
dd_linestr_callback(aTHX_ "rv2cv", GvNAME(kGVOP_gv));
return o;
}
OP* dd_pp_entereval(pTHX) {
dSP;
STRLEN len;
const char* s;
SV *sv;
#ifdef PERL_5_9_PLUS
SV *saved_hh;
if (PL_op->op_private & OPpEVAL_HAS_HH) {
saved_hh = POPs;
}
#endif
sv = POPs;
if (SvPOK(sv)) {
if (DD_DEBUG_TRACE) {
printf("mangling eval sv\n");
}
if (SvREADONLY(sv))
sv = sv_2mortal(newSVsv(sv));
s = SvPVX(sv);
len = SvCUR(sv);
if (!len || s[len-1] != ';') {
if (!(SvFLAGS(sv) & SVs_TEMP))
sv = sv_2mortal(newSVsv(sv));
sv_catpvn(sv, "\n;", 2);
}
SvGROW(sv, 8192);
}
PUSHs(sv);
#ifdef PERL_5_9_PLUS
if (PL_op->op_private & OPpEVAL_HAS_HH) {
PUSHs(saved_hh);
}
#endif
return PL_ppaddr[OP_ENTEREVAL](aTHX);
}
STATIC OP *dd_ck_entereval(pTHX_ OP *o, void *user_data) {
PERL_UNUSED_VAR(user_data);
if (o->op_ppaddr == PL_ppaddr[OP_ENTEREVAL])
o->op_ppaddr = dd_pp_entereval;
return o;
}
static I32 dd_filter_realloc(pTHX_ int idx, SV *sv, int maxlen)
{
const I32 count = FILTER_READ(idx+1, sv, maxlen);
SvGROW(sv, 8192); /* please try not to have a line longer than this :) */
/* filter_del(dd_filter_realloc); */
return count;
}
static int dd_handle_const(pTHX_ char *name) {
switch (PL_lex_inwhat) {
case OP_QR:
case OP_MATCH:
case OP_SUBST:
case OP_TRANS:
case OP_BACKTICK:
case OP_STRINGIFY:
return 0;
break;
default:
break;
}
if (strnEQ(PL_bufptr, "->", 2)) {
return 0;
}
{
char buf[256];
STRLEN len;
char *s = PL_bufptr;
STRLEN old_offset = PL_bufptr - SvPVX(PL_linestr);
s = scan_word(s, buf, sizeof buf, FALSE, &len);
if (strnEQ(buf, name, len)) {
char *d;
SV *inject = newSVpvn(SvPVX(PL_linestr), PL_bufptr - SvPVX(PL_linestr));
sv_catpvn(inject, buf, len);
d = peekspace(s);
sv_catpvn(inject, s, d - s);
if ((PL_bufend - d) >= 2 && strnEQ(d, "=>", 2)) {
return 0;
}
sv_catpv(inject, d);
dd_set_linestr(aTHX_ SvPV_nolen(inject));
PL_bufptr = SvPVX(PL_linestr) + old_offset;
SvREFCNT_dec (inject);
}
}
dd_linestr_callback(aTHX_ "const", name);
return 1;
}
#if !DD_CONST_VIA_RV2CV
STATIC OP *dd_ck_const(pTHX_ OP *o, void *user_data) {
int dd_flags;
char* name;
PERL_UNUSED_VAR(user_data);
if (DD_HAVE_PARSER && PL_expect == XOPERATOR) {
return o;
}
/* if this is set, we just grabbed a delimited string or something,
not a bareword, so NO TOUCHY */
if (DD_HAVE_LEX_STUFF)
return o;
/* don't try and look this up if it's not a string const */
if (!SvPOK(cSVOPo->op_sv))
return o;
name = SvPVX(cSVOPo->op_sv);
dd_flags = dd_is_declarator(aTHX_ name);
if (dd_flags == -1)
return o;
dd_handle_const(aTHX_ name);
return o;
}
#endif /* !DD_CONST_VIA_RV2CV */
static int initialized = 0;
MODULE = Devel::Declare PACKAGE = Devel::Declare
PROTOTYPES: DISABLE
void
setup()
CODE:
if (!initialized++) {
hook_op_check(OP_RV2CV, dd_ck_rv2cv, NULL);
hook_op_check(OP_ENTEREVAL, dd_ck_entereval, NULL);
#if !DD_CONST_VIA_RV2CV
hook_op_check(OP_CONST, dd_ck_const, NULL);
#endif /* !DD_CONST_VIA_RV2CV */
}
filter_add(dd_filter_realloc, NULL);
char*
get_linestr()
CODE:
RETVAL = dd_get_linestr(aTHX);
OUTPUT:
RETVAL
void
set_linestr(char* new_value)
CODE:
dd_set_linestr(aTHX_ new_value);
char*
get_lex_stuff()
CODE:
RETVAL = dd_get_lex_stuff(aTHX);
OUTPUT:
RETVAL
void
clear_lex_stuff()
CODE:
dd_clear_lex_stuff(aTHX);
char*
get_curstash_name()
CODE:
RETVAL = dd_get_curstash_name(aTHX);
OUTPUT:
RETVAL
int
get_linestr_offset()
CODE:
RETVAL = dd_get_linestr_offset(aTHX);
OUTPUT:
RETVAL
int
toke_scan_word(int offset, int handle_package)
CODE:
RETVAL = dd_toke_scan_word(aTHX_ offset, handle_package);
OUTPUT:
RETVAL
int
toke_move_past_token(int offset);
CODE:
RETVAL = dd_toke_move_past_token(aTHX_ offset);
OUTPUT:
RETVAL
int
toke_scan_str(int offset);
CODE:
RETVAL = dd_toke_scan_str(aTHX_ offset);
OUTPUT:
RETVAL
int
toke_scan_ident(int offset)
CODE:
RETVAL = dd_toke_scan_ident(aTHX_ offset);
OUTPUT:
RETVAL
int
toke_skipspace(int offset)
CODE:
RETVAL = dd_toke_skipspace(aTHX_ offset);
OUTPUT:
RETVAL
int
get_in_declare()
CODE:
RETVAL = in_declare;
OUTPUT:
RETVAL
void
set_in_declare(int value)
CODE:
in_declare = value;
BOOT:
{
char *endptr;
char *debug_str = getenv ("DD_DEBUG");
if (debug_str) {
dd_debug = strtol (debug_str, &endptr, 10);
if (*endptr != '\0') {
dd_debug = 0;
}
}
}