[p5sagit/Devel-Declare.git] / Declare.xs

#define PERL_CORE
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#undef printf
#include "stolen_chunk_of_toke.c"
#include <stdio.h>
#include <string.h>

#ifndef Newx
# define Newx(v,n,t) New(0,v,n,t)
#endif /* !Newx */

#if 1
#define DD_HAS_TRAITS
#endif

#if 0
#define DD_DEBUG
#endif

#define DD_HANDLE_NAME 1
#define DD_HANDLE_PROTO 2
#define DD_HANDLE_PACKAGE 8

#ifdef DD_DEBUG
#define DD_DEBUG_S printf("Buffer: %s\n", s);
#else
#define DD_DEBUG_S
#endif

#define LEX_NORMAL    10
#define LEX_INTERPNORMAL   9

/* placeholders for PL_check entries we wrap */

STATIC OP *(*dd_old_ck_rv2cv)(pTHX_ OP *op);
STATIC OP *(*dd_old_ck_entereval)(pTHX_ OP *op);

/* flag to trigger removal of temporary declaree sub */

static int in_declare = 0;

/* replacement PL_check rv2cv entry */

STATIC OP *dd_ck_rv2cv(pTHX_ OP *o) {
  OP* kid;
  char* s;
  char* save_s;
  char tmpbuf[sizeof PL_tokenbuf];
  char found_name[sizeof PL_tokenbuf];
  char* found_proto = NULL, *found_traits = NULL;
  STRLEN len = 0;
  HV *stash;
  HV* is_declarator;
  SV** is_declarator_pack_ref;
  HV* is_declarator_pack_hash;
  SV** is_declarator_flag_ref;
  int dd_flags;
  char* cb_args[6];
  dSP; /* define stack pointer for later call stuff */
  char* retstr;
  STRLEN n_a; /* for POPpx */

  o = dd_old_ck_rv2cv(aTHX_ o); /* let the original do its job */

  if (in_declare) {
    cb_args[0] = NULL;
#ifdef DD_DEBUG
    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));
#endif
    call_argv("Devel::Declare::done_declare", G_VOID|G_DISCARD, cb_args);
    in_declare--;
#ifdef DD_DEBUG
    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));
#endif
    return o;
  }

  kid = cUNOPo->op_first;

  if (kid->op_type != OP_GV) /* not a GV so ignore */
    return o;

  if (PL_lex_state != LEX_NORMAL && PL_lex_state != LEX_INTERPNORMAL)
    return o; /* not lexing? */

  stash = GvSTASH(kGVOP_gv);

#ifdef DD_DEBUG
  printf("Checking GV %s -> %s\n", HvNAME(stash), GvNAME(kGVOP_gv));
#endif

  is_declarator = get_hv("Devel::Declare::declarators", FALSE);

  if (!is_declarator)
    return o;

  is_declarator_pack_ref = hv_fetch(is_declarator, HvNAME(stash),
                             strlen(HvNAME(stash)), FALSE);

  if (!is_declarator_pack_ref || !SvROK(*is_declarator_pack_ref))
    return o; /* not a hashref */

  is_declarator_pack_hash = (HV*) SvRV(*is_declarator_pack_ref);

  is_declarator_flag_ref = hv_fetch(is_declarator_pack_hash, GvNAME(kGVOP_gv),
                                strlen(GvNAME(kGVOP_gv)), 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 o;

  dd_flags = SvIVX(*is_declarator_flag_ref);

#ifdef DD_DEBUG
  printf("dd_flags are: %i\n", dd_flags);
#endif

  s = PL_bufptr; /* copy the current buffer pointer */

  DD_DEBUG_S

#ifdef DD_DEBUG
  printf("PL_tokenbuf: %s\n", PL_tokenbuf);
#endif

  /*
   *   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);

  DD_DEBUG_S

  if (dd_flags & DD_HANDLE_NAME) {

    /* find next word */

    s = skipspace(s);

    DD_DEBUG_S

    /* arg 4 is allow_package */

    s = scan_word(s, tmpbuf, sizeof tmpbuf, dd_flags & DD_HANDLE_PACKAGE, &len);

    DD_DEBUG_S

    if (len) {
      strcpy(found_name, tmpbuf);
#ifdef DD_DEBUG
      printf("Found %s\n", found_name);
#endif
    }
  }

  if (dd_flags & DD_HANDLE_PROTO) {

    s = skipspace(s);

    if (*s == '(') { /* found a prototype-ish thing */
      save_s = s;
      s = scan_str(s, FALSE, FALSE); /* no keep_quoted, no keep_delims */
#ifdef DD_HAS_TRAITS
      {
          char *traitstart = s = skipspace(s);

          while (*s && *s != '{') ++s;
          if (*s) {
              int tlen = s - traitstart;
              Newx(found_traits, tlen+1, char);
              Copy(traitstart, found_traits, tlen, char);
              found_traits[tlen] = 0;
#ifdef DD_DEBUG
              printf("found traits..... (%s)\n", found_traits);
#endif
          }
      }
#endif
      
      if (SvPOK(PL_lex_stuff)) {
#ifdef DD_DEBUG
        printf("Found proto %s\n", SvPVX(PL_lex_stuff));
#endif
        found_proto = SvPVX(PL_lex_stuff);
        if (len) /* foo name () => foo name  X, only foo parsed so works */
          *save_s++ = ' ';
        else /* foo () => foo =X, TOKEN('&') won't handle foo X */
          *save_s++ = '=';
        *save_s++ = 'X';
        while (save_s < s) {
          *save_s++ = ' ';
        }
#ifdef DD_DEBUG
        printf("Curbuf %s\n", PL_bufptr);
#endif
      }
    }
  }

  if (!len)
    found_name[0] = 0;

#ifdef DD_DEBUG
  printf("Calling init_declare\n");
#endif
  cb_args[0] = HvNAME(stash);
  cb_args[1] = GvNAME(kGVOP_gv);
  cb_args[2] = HvNAME(PL_curstash);
  cb_args[3] = found_name;
  cb_args[4] = found_proto;
  cb_args[5] = found_traits;
  cb_args[6] = NULL;

  if (len && found_proto)
    in_declare = 2;
  else if (len || found_proto)
    in_declare = 1;
  if (found_proto)
    PL_lex_stuff = Nullsv;
  s = skipspace(s);
#ifdef DD_DEBUG
  printf("cur buf: %s\n", s);
  printf("bufend at: %i\n", PL_bufend - s);
  printf("linestr: %s\n", SvPVX(PL_linestr));
  printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
#endif
  if (*s++ == '{') {
    call_argv("Devel::Declare::init_declare", G_SCALAR, cb_args);
    SPAGAIN;
    retstr = POPpx;
    PUTBACK;
    if (retstr && strlen(retstr)) {
      const char* old_start = SvPVX(PL_linestr);
      int start_diff;
      const int old_len = SvCUR(PL_linestr);
#ifdef DD_DEBUG
      printf("Got string %s\n", retstr);
#endif
      SvGROW(PL_linestr, (STRLEN)(old_len + strlen(retstr)));
      if (start_diff = SvPVX(PL_linestr) - old_start) {
        Perl_croak(aTHX_ "forced to realloc PL_linestr for line %s, bailing out before we crash harder", SvPVX(PL_linestr));
      }
      memmove(s+strlen(retstr), s, (PL_bufend - s)+1);
      memmove(s, retstr, strlen(retstr));
      SvCUR_set(PL_linestr, old_len + strlen(retstr));
      PL_bufend += strlen(retstr);
#ifdef DD_DEBUG
  printf("cur buf: %s\n", s);
  printf("PL_bufptr: %s\n", PL_bufptr);
  printf("bufend at: %i\n", PL_bufend - s);
  printf("linestr: %s\n", SvPVX(PL_linestr));
  printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
  printf("tokenbuf now: %s\n", PL_tokenbuf);
#endif
    }
  } else {
    call_argv("Devel::Declare::init_declare", G_VOID|G_DISCARD, cb_args);
  }
  return o;
}

OP* dd_pp_entereval(pTHX) {
  dSP;
  dPOPss;
  STRLEN len;
  const char* s;
  if (SvPOK(sv)) {
#ifdef DD_DEBUG
    printf("mangling eval sv\n");
#endif
    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);
  return PL_ppaddr[OP_ENTEREVAL](aTHX);
}

STATIC OP *dd_ck_entereval(pTHX_ OP *o) {
  o = dd_old_ck_entereval(aTHX_ o); /* let the original do its job */
  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 initialized = 0;

MODULE = Devel::Declare  PACKAGE = Devel::Declare

PROTOTYPES: DISABLE

void
setup()
  CODE:
  if (!initialized++) {
    dd_old_ck_rv2cv = PL_check[OP_RV2CV];
    PL_check[OP_RV2CV] = dd_ck_rv2cv;
    dd_old_ck_entereval = PL_check[OP_ENTEREVAL];
    PL_check[OP_ENTEREVAL] = dd_ck_entereval;
  }
  filter_add(dd_filter_realloc, NULL);
Commit	Line	Data
94caac6e	1	#define PERL_CORE
94caac6e	2	#define PERL_NO_GET_CONTEXT
94caac6e	3	#include "EXTERN.h"
	4	#include "perl.h"
	5	#include "XSUB.h"
	6	#undef printf
e807ee50	7	#include "stolen_chunk_of_toke.c"
94caac6e	8	#include <stdio.h>
	9	#include <string.h>
	10
9673d7ca	11	#ifndef Newx
	12	# define Newx(v,n,t) New(0,v,n,t)
	13	#endif /* !Newx */
	14
	15	#if 1
0f070758	16	#define DD_HAS_TRAITS
9673d7ca	17	#endif
9673d7ca	18
53e3ab32	19	#if 0
	20	#define DD_DEBUG
	21	#endif
c630715a	22
0ba8c7aa	23	#define DD_HANDLE_NAME 1
0ba8c7aa	24	#define DD_HANDLE_PROTO 2
15d0d014	25	#define DD_HANDLE_PACKAGE 8
0ba8c7aa	26
c630715a	27	#ifdef DD_DEBUG
	28	#define DD_DEBUG_S printf("Buffer: %s\n", s);
	29	#else
	30	#define DD_DEBUG_S
	31	#endif
	32
94caac6e	33	#define LEX_NORMAL 10
	34	#define LEX_INTERPNORMAL 9
	35
	36	/* placeholders for PL_check entries we wrap */
	37
	38	STATIC OP (dd_old_ck_rv2cv)(pTHX_ OP *op);
b7505981	39	STATIC OP (dd_old_ck_entereval)(pTHX_ OP *op);
94caac6e	40
	41	/* flag to trigger removal of temporary declaree sub */
	42
	43	static int in_declare = 0;
	44
	45	/* replacement PL_check rv2cv entry */
	46
	47	STATIC OP dd_ck_rv2cv(pTHX_ OP o) {
	48	OP* kid;
	49	char* s;
0ba8c7aa	50	char* save_s;
94caac6e	51	char tmpbuf[sizeof PL_tokenbuf];
0ba8c7aa	52	char found_name[sizeof PL_tokenbuf];
0f070758	53	char* found_proto = NULL, *found_traits = NULL;
0ba8c7aa	54	STRLEN len = 0;
94caac6e	55	HV *stash;
	56	HV* is_declarator;
	57	SV** is_declarator_pack_ref;
	58	HV* is_declarator_pack_hash;
	59	SV** is_declarator_flag_ref;
0ba8c7aa	60	int dd_flags;
9026391e	61	char* cb_args[6];
53e3ab32	62	dSP; /* define stack pointer for later call stuff */
	63	char* retstr;
	64	STRLEN n_a; /* for POPpx */
94caac6e	65
	66	o = dd_old_ck_rv2cv(aTHX_ o); /* let the original do its job */
	67
	68	if (in_declare) {
	69	cb_args[0] = NULL;
dcca2c59	70	#ifdef DD_DEBUG
	71	printf("Deconstructing declare\n");
	72	printf("PL_bufptr: %s\n", PL_bufptr);
	73	printf("bufend at: %i\n", PL_bufend - PL_bufptr);
	74	printf("linestr: %s\n", SvPVX(PL_linestr));
	75	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	76	#endif
94caac6e	77	call_argv("Devel::Declare::done_declare", G_VOID\|G_DISCARD, cb_args);
0ba8c7aa	78	in_declare--;
dcca2c59	79	#ifdef DD_DEBUG
	80	printf("PL_bufptr: %s\n", PL_bufptr);
	81	printf("bufend at: %i\n", PL_bufend - PL_bufptr);
	82	printf("linestr: %s\n", SvPVX(PL_linestr));
	83	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	84	printf("actual len: %i\n", strlen(PL_bufptr));
	85	#endif
94caac6e	86	return o;
	87	}
	88
	89	kid = cUNOPo->op_first;
	90
	91	if (kid->op_type != OP_GV) /* not a GV so ignore */
	92	return o;
	93
	94	if (PL_lex_state != LEX_NORMAL && PL_lex_state != LEX_INTERPNORMAL)
	95	return o; /* not lexing? */
	96
	97	stash = GvSTASH(kGVOP_gv);
	98
c630715a	99	#ifdef DD_DEBUG
	100	printf("Checking GV %s -> %s\n", HvNAME(stash), GvNAME(kGVOP_gv));
	101	#endif
94caac6e	102
	103	is_declarator = get_hv("Devel::Declare::declarators", FALSE);
	104
	105	if (!is_declarator)
	106	return o;
	107
	108	is_declarator_pack_ref = hv_fetch(is_declarator, HvNAME(stash),
	109	strlen(HvNAME(stash)), FALSE);
	110
	111	if (!is_declarator_pack_ref \|\| !SvROK(*is_declarator_pack_ref))
	112	return o; /* not a hashref */
	113
	114	is_declarator_pack_hash = (HV) SvRV(is_declarator_pack_ref);
	115
	116	is_declarator_flag_ref = hv_fetch(is_declarator_pack_hash, GvNAME(kGVOP_gv),
	117	strlen(GvNAME(kGVOP_gv)), FALSE);
	118
0ba8c7aa	119	/* requires SvIOK as well as TRUE since flags not being an int is useless */
	120
	121	if (!is_declarator_flag_ref
	122	\|\| !SvIOK(*is_declarator_flag_ref)
	123	\|\| !SvTRUE(*is_declarator_flag_ref))
94caac6e	124	return o;
94caac6e	125
0ba8c7aa	126	dd_flags = SvIVX(*is_declarator_flag_ref);
	127
	128	#ifdef DD_DEBUG
	129	printf("dd_flags are: %i\n", dd_flags);
	130	#endif
	131
94caac6e	132	s = PL_bufptr; /* copy the current buffer pointer */
94caac6e	133
c630715a	134	DD_DEBUG_S
	135
	136	#ifdef DD_DEBUG
0ba8c7aa	137	printf("PL_tokenbuf: %s\n", PL_tokenbuf);
c630715a	138	#endif
	139
	140	/*
	141	* buffer will be at the beginning of the declarator, -unless- the
	142	* declarator is at EOL in which case it'll be the next useful line
	143	* so we don't short-circuit out if we don't find the declarator
	144	*/
	145
94caac6e	146	while (s < PL_bufend && isSPACE(*s)) s++;
	147	if (memEQ(s, PL_tokenbuf, strlen(PL_tokenbuf)))
	148	s += strlen(PL_tokenbuf);
c630715a	149
c630715a	150	DD_DEBUG_S
94caac6e	151
0ba8c7aa	152	if (dd_flags & DD_HANDLE_NAME) {
94caac6e	153
0ba8c7aa	154	/* find next word */
94caac6e	155
0ba8c7aa	156	s = skipspace(s);
c630715a	157
0ba8c7aa	158	DD_DEBUG_S
94caac6e	159
15d0d014	160	/* arg 4 is allow_package */
94caac6e	161
15d0d014	162	s = scan_word(s, tmpbuf, sizeof tmpbuf, dd_flags & DD_HANDLE_PACKAGE, &len);
0ba8c7aa	163
0ba8c7aa	164	DD_DEBUG_S
c630715a	165
0ba8c7aa	166	if (len) {
	167	strcpy(found_name, tmpbuf);
	168	#ifdef DD_DEBUG
	169	printf("Found %s\n", found_name);
	170	#endif
	171	}
	172	}
	173
	174	if (dd_flags & DD_HANDLE_PROTO) {
	175
	176	s = skipspace(s);
	177
	178	if (s == '(') { / found a prototype-ish thing */
	179	save_s = s;
	180	s = scan_str(s, FALSE, FALSE); /* no keep_quoted, no keep_delims */
0f070758	181	#ifdef DD_HAS_TRAITS
	182	{
	183	char *traitstart = s = skipspace(s);
	184
	185	while (s && s != '{') ++s;
	186	if (*s) {
	187	int tlen = s - traitstart;
9673d7ca	188	Newx(found_traits, tlen+1, char);
0f070758	189	Copy(traitstart, found_traits, tlen, char);
	190	found_traits[tlen] = 0;
	191	#ifdef DD_DEBUG
	192	printf("found traits..... (%s)\n", found_traits);
	193	#endif
	194	}
	195	}
	196	#endif
	197
0ba8c7aa	198	if (SvPOK(PL_lex_stuff)) {
	199	#ifdef DD_DEBUG
	200	printf("Found proto %s\n", SvPVX(PL_lex_stuff));
	201	#endif
	202	found_proto = SvPVX(PL_lex_stuff);
53e3ab32	203	if (len) /* foo name () => foo name X, only foo parsed so works */
	204	*save_s++ = ' ';
	205	else /* foo () => foo =X, TOKEN('&') won't handle foo X */
	206	*save_s++ = '=';
0ba8c7aa	207	*save_s++ = 'X';
	208	while (save_s < s) {
	209	*save_s++ = ' ';
	210	}
	211	#ifdef DD_DEBUG
	212	printf("Curbuf %s\n", PL_bufptr);
	213	#endif
	214	}
	215	}
	216	}
	217
53e3ab32	218	if (!len)
	219	found_name[0] = 0;
	220
	221	#ifdef DD_DEBUG
	222	printf("Calling init_declare\n");
	223	#endif
	224	cb_args[0] = HvNAME(stash);
	225	cb_args[1] = GvNAME(kGVOP_gv);
9026391e	226	cb_args[2] = HvNAME(PL_curstash);
	227	cb_args[3] = found_name;
	228	cb_args[4] = found_proto;
0f070758	229	cb_args[5] = found_traits;
0f070758	230	cb_args[6] = NULL;
53e3ab32	231
	232	if (len && found_proto)
	233	in_declare = 2;
	234	else if (len \|\| found_proto)
	235	in_declare = 1;
	236	if (found_proto)
	237	PL_lex_stuff = Nullsv;
	238	s = skipspace(s);
	239	#ifdef DD_DEBUG
	240	printf("cur buf: %s\n", s);
	241	printf("bufend at: %i\n", PL_bufend - s);
	242	printf("linestr: %s\n", SvPVX(PL_linestr));
	243	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	244	#endif
	245	if (*s++ == '{') {
	246	call_argv("Devel::Declare::init_declare", G_SCALAR, cb_args);
	247	SPAGAIN;
	248	retstr = POPpx;
	249	PUTBACK;
	250	if (retstr && strlen(retstr)) {
dcca2c59	251	const char* old_start = SvPVX(PL_linestr);
dcca2c59	252	int start_diff;
c5912dc7	253	const int old_len = SvCUR(PL_linestr);
0ba8c7aa	254	#ifdef DD_DEBUG
53e3ab32	255	printf("Got string %s\n", retstr);
0ba8c7aa	256	#endif
c5912dc7	257	SvGROW(PL_linestr, (STRLEN)(old_len + strlen(retstr)));
dcca2c59	258	if (start_diff = SvPVX(PL_linestr) - old_start) {
8314c6b3	259	Perl_croak(aTHX_ "forced to realloc PL_linestr for line %s, bailing out before we crash harder", SvPVX(PL_linestr));
dcca2c59	260	}
53e3ab32	261	memmove(s+strlen(retstr), s, (PL_bufend - s)+1);
53e3ab32	262	memmove(s, retstr, strlen(retstr));
c5912dc7	263	SvCUR_set(PL_linestr, old_len + strlen(retstr));
53e3ab32	264	PL_bufend += strlen(retstr);
	265	#ifdef DD_DEBUG
	266	printf("cur buf: %s\n", s);
dcca2c59	267	printf("PL_bufptr: %s\n", PL_bufptr);
53e3ab32	268	printf("bufend at: %i\n", PL_bufend - s);
	269	printf("linestr: %s\n", SvPVX(PL_linestr));
	270	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
dcca2c59	271	printf("tokenbuf now: %s\n", PL_tokenbuf);
53e3ab32	272	#endif
	273	}
	274	} else {
94caac6e	275	call_argv("Devel::Declare::init_declare", G_VOID\|G_DISCARD, cb_args);
94caac6e	276	}
53e3ab32	277	return o;
	278	}
	279
b7505981	280	OP* dd_pp_entereval(pTHX) {
	281	dSP;
	282	dPOPss;
	283	STRLEN len;
	284	const char* s;
	285	if (SvPOK(sv)) {
53e3ab32	286	#ifdef DD_DEBUG
b7505981	287	printf("mangling eval sv\n");
53e3ab32	288	#endif
b7505981	289	if (SvREADONLY(sv))
	290	sv = sv_2mortal(newSVsv(sv));
	291	s = SvPVX(sv);
	292	len = SvCUR(sv);
	293	if (!len \|\| s[len-1] != ';') {
	294	if (!(SvFLAGS(sv) & SVs_TEMP))
	295	sv = sv_2mortal(newSVsv(sv));
	296	sv_catpvn(sv, "\n;", 2);
53e3ab32	297	}
b7505981	298	SvGROW(sv, 8192);
53e3ab32	299	}
b7505981	300	PUSHs(sv);
	301	return PL_ppaddr[OP_ENTEREVAL](aTHX);
	302	}
53e3ab32	303
b7505981	304	STATIC OP dd_ck_entereval(pTHX_ OP o) {
b7505981	305	o = dd_old_ck_entereval(aTHX_ o); /* let the original do its job */
d8e65fc8	306	if (o->op_ppaddr == PL_ppaddr[OP_ENTEREVAL])
d8e65fc8	307	o->op_ppaddr = dd_pp_entereval;
94caac6e	308	return o;
	309	}
	310
6a0bcf35	311	static I32 dd_filter_realloc(pTHX_ int idx, SV *sv, int maxlen)
	312	{
	313	const I32 count = FILTER_READ(idx+1, sv, maxlen);
	314	SvGROW(sv, 8192); /* please try not to have a line longer than this :) */
	315	/* filter_del(dd_filter_realloc); */
	316	return count;
	317	}
	318
94caac6e	319	static int initialized = 0;
	320
	321	MODULE = Devel::Declare PACKAGE = Devel::Declare
	322
	323	PROTOTYPES: DISABLE
	324
	325	void
	326	setup()
	327	CODE:
	328	if (!initialized++) {
	329	dd_old_ck_rv2cv = PL_check[OP_RV2CV];
	330	PL_check[OP_RV2CV] = dd_ck_rv2cv;
b7505981	331	dd_old_ck_entereval = PL_check[OP_ENTEREVAL];
b7505981	332	PL_check[OP_ENTEREVAL] = dd_ck_entereval;
94caac6e	333	}
6a0bcf35	334	filter_add(dd_filter_realloc, NULL);