[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

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

static int in_declare = 0;

/* replacement PL_check rv2cv entry */

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

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

    /* kill the :: added in the ck_const */
    if (*s == ':')
      *s++ = ' ';
    if (*s == ':')
      *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;
}

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

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 OP *(*dd_old_ck_const)(pTHX_ OP*op);

STATIC OP *dd_ck_const(pTHX_ OP *o) {
  HV* is_declarator;
  SV** is_declarator_pack_ref;
  HV* is_declarator_pack_hash;
  SV** is_declarator_flag_ref;
  int dd_flags;
  char* s;
  char tmpbuf[sizeof PL_tokenbuf];
  char found_name[sizeof PL_tokenbuf];
  STRLEN len = 0;

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

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

  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 o; /* not a hashref */

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

  /* don't try and look this up if it's not a string const */
  if (!SvPOK(cSVOPo->op_sv))
    return o;

  is_declarator_flag_ref = hv_fetch(
    is_declarator_pack_hash, SvPVX(cSVOPo->op_sv),
    strlen(SvPVX(cSVOPo->op_sv)), 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);

  if (!(dd_flags & DD_HANDLE_NAME))
    return o; /* if we're not handling name, method intuiting not an issue */

#ifdef DD_DEBUG
  printf("Think I found a declarator %s\n", PL_tokenbuf);
  printf("linestr: %s\n", SvPVX(PL_linestr));
#endif

  s = PL_bufptr;

  while (s < PL_bufend && isSPACE(*s)) s++;
  if (memEQ(s, PL_tokenbuf, strlen(PL_tokenbuf)))
    s += strlen(PL_tokenbuf);

  DD_DEBUG_S

  /* 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) {
    const char* old_start = SvPVX(PL_linestr);
    int start_diff;
    const int old_len = SvCUR(PL_linestr);

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

    s -= len;
    SvGROW(PL_linestr, (STRLEN)(old_len + 2));
    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+2, s, (PL_bufend - s)+1);
    *s = ':';
    s++;
    *s = ':';
    SvCUR_set(PL_linestr, old_len + 2);
    PL_bufend += 2;
  }
  return o;  
}

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;
    dd_old_ck_const = PL_check[OP_CONST];
    PL_check[OP_CONST] = dd_ck_const;
  }
  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
94caac6e	36	/* flag to trigger removal of temporary declaree sub */
	37
	38	static int in_declare = 0;
	39
	40	/* replacement PL_check rv2cv entry */
	41
bedac9ff	42	STATIC OP (dd_old_ck_rv2cv)(pTHX_ OP *op);
bedac9ff	43
94caac6e	44	STATIC OP dd_ck_rv2cv(pTHX_ OP o) {
	45	OP* kid;
	46	char* s;
0ba8c7aa	47	char* save_s;
94caac6e	48	char tmpbuf[sizeof PL_tokenbuf];
0ba8c7aa	49	char found_name[sizeof PL_tokenbuf];
0f070758	50	char* found_proto = NULL, *found_traits = NULL;
0ba8c7aa	51	STRLEN len = 0;
94caac6e	52	HV *stash;
	53	HV* is_declarator;
	54	SV** is_declarator_pack_ref;
	55	HV* is_declarator_pack_hash;
	56	SV** is_declarator_flag_ref;
0ba8c7aa	57	int dd_flags;
9026391e	58	char* cb_args[6];
53e3ab32	59	dSP; /* define stack pointer for later call stuff */
	60	char* retstr;
	61	STRLEN n_a; /* for POPpx */
94caac6e	62
	63	o = dd_old_ck_rv2cv(aTHX_ o); /* let the original do its job */
	64
	65	if (in_declare) {
	66	cb_args[0] = NULL;
dcca2c59	67	#ifdef DD_DEBUG
	68	printf("Deconstructing declare\n");
	69	printf("PL_bufptr: %s\n", PL_bufptr);
	70	printf("bufend at: %i\n", PL_bufend - PL_bufptr);
	71	printf("linestr: %s\n", SvPVX(PL_linestr));
	72	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	73	#endif
94caac6e	74	call_argv("Devel::Declare::done_declare", G_VOID\|G_DISCARD, cb_args);
0ba8c7aa	75	in_declare--;
dcca2c59	76	#ifdef DD_DEBUG
	77	printf("PL_bufptr: %s\n", PL_bufptr);
	78	printf("bufend at: %i\n", PL_bufend - PL_bufptr);
	79	printf("linestr: %s\n", SvPVX(PL_linestr));
	80	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	81	printf("actual len: %i\n", strlen(PL_bufptr));
	82	#endif
94caac6e	83	return o;
	84	}
	85
	86	kid = cUNOPo->op_first;
	87
	88	if (kid->op_type != OP_GV) /* not a GV so ignore */
	89	return o;
	90
	91	if (PL_lex_state != LEX_NORMAL && PL_lex_state != LEX_INTERPNORMAL)
	92	return o; /* not lexing? */
	93
	94	stash = GvSTASH(kGVOP_gv);
	95
c630715a	96	#ifdef DD_DEBUG
	97	printf("Checking GV %s -> %s\n", HvNAME(stash), GvNAME(kGVOP_gv));
	98	#endif
94caac6e	99
	100	is_declarator = get_hv("Devel::Declare::declarators", FALSE);
	101
	102	if (!is_declarator)
	103	return o;
	104
	105	is_declarator_pack_ref = hv_fetch(is_declarator, HvNAME(stash),
	106	strlen(HvNAME(stash)), FALSE);
	107
	108	if (!is_declarator_pack_ref \|\| !SvROK(*is_declarator_pack_ref))
	109	return o; /* not a hashref */
	110
	111	is_declarator_pack_hash = (HV) SvRV(is_declarator_pack_ref);
	112
	113	is_declarator_flag_ref = hv_fetch(is_declarator_pack_hash, GvNAME(kGVOP_gv),
	114	strlen(GvNAME(kGVOP_gv)), FALSE);
	115
0ba8c7aa	116	/* requires SvIOK as well as TRUE since flags not being an int is useless */
	117
	118	if (!is_declarator_flag_ref
	119	\|\| !SvIOK(*is_declarator_flag_ref)
	120	\|\| !SvTRUE(*is_declarator_flag_ref))
94caac6e	121	return o;
94caac6e	122
0ba8c7aa	123	dd_flags = SvIVX(*is_declarator_flag_ref);
	124
	125	#ifdef DD_DEBUG
	126	printf("dd_flags are: %i\n", dd_flags);
	127	#endif
	128
94caac6e	129	s = PL_bufptr; /* copy the current buffer pointer */
94caac6e	130
c630715a	131	DD_DEBUG_S
	132
	133	#ifdef DD_DEBUG
0ba8c7aa	134	printf("PL_tokenbuf: %s\n", PL_tokenbuf);
c630715a	135	#endif
	136
	137	/*
	138	* buffer will be at the beginning of the declarator, -unless- the
	139	* declarator is at EOL in which case it'll be the next useful line
	140	* so we don't short-circuit out if we don't find the declarator
	141	*/
	142
94caac6e	143	while (s < PL_bufend && isSPACE(*s)) s++;
	144	if (memEQ(s, PL_tokenbuf, strlen(PL_tokenbuf)))
	145	s += strlen(PL_tokenbuf);
c630715a	146
c630715a	147	DD_DEBUG_S
94caac6e	148
0ba8c7aa	149	if (dd_flags & DD_HANDLE_NAME) {
94caac6e	150
0ba8c7aa	151	/* find next word */
94caac6e	152
0ba8c7aa	153	s = skipspace(s);
c630715a	154
0ba8c7aa	155	DD_DEBUG_S
94caac6e	156
bedac9ff	157	/* kill the :: added in the ck_const */
	158	if (*s == ':')
	159	*s++ = ' ';
	160	if (*s == ':')
	161	*s++ = ' ';
	162
15d0d014	163	/* arg 4 is allow_package */
94caac6e	164
15d0d014	165	s = scan_word(s, tmpbuf, sizeof tmpbuf, dd_flags & DD_HANDLE_PACKAGE, &len);
0ba8c7aa	166
0ba8c7aa	167	DD_DEBUG_S
c630715a	168
0ba8c7aa	169	if (len) {
	170	strcpy(found_name, tmpbuf);
	171	#ifdef DD_DEBUG
	172	printf("Found %s\n", found_name);
	173	#endif
	174	}
	175	}
	176
	177	if (dd_flags & DD_HANDLE_PROTO) {
	178
	179	s = skipspace(s);
	180
	181	if (s == '(') { / found a prototype-ish thing */
	182	save_s = s;
	183	s = scan_str(s, FALSE, FALSE); /* no keep_quoted, no keep_delims */
0f070758	184	#ifdef DD_HAS_TRAITS
	185	{
	186	char *traitstart = s = skipspace(s);
	187
	188	while (s && s != '{') ++s;
	189	if (*s) {
	190	int tlen = s - traitstart;
9673d7ca	191	Newx(found_traits, tlen+1, char);
0f070758	192	Copy(traitstart, found_traits, tlen, char);
	193	found_traits[tlen] = 0;
	194	#ifdef DD_DEBUG
	195	printf("found traits..... (%s)\n", found_traits);
	196	#endif
	197	}
	198	}
	199	#endif
	200
0ba8c7aa	201	if (SvPOK(PL_lex_stuff)) {
	202	#ifdef DD_DEBUG
	203	printf("Found proto %s\n", SvPVX(PL_lex_stuff));
	204	#endif
	205	found_proto = SvPVX(PL_lex_stuff);
53e3ab32	206	if (len) /* foo name () => foo name X, only foo parsed so works */
	207	*save_s++ = ' ';
	208	else /* foo () => foo =X, TOKEN('&') won't handle foo X */
	209	*save_s++ = '=';
0ba8c7aa	210	*save_s++ = 'X';
	211	while (save_s < s) {
	212	*save_s++ = ' ';
	213	}
	214	#ifdef DD_DEBUG
	215	printf("Curbuf %s\n", PL_bufptr);
	216	#endif
	217	}
	218	}
	219	}
	220
53e3ab32	221	if (!len)
	222	found_name[0] = 0;
	223
	224	#ifdef DD_DEBUG
	225	printf("Calling init_declare\n");
	226	#endif
	227	cb_args[0] = HvNAME(stash);
	228	cb_args[1] = GvNAME(kGVOP_gv);
9026391e	229	cb_args[2] = HvNAME(PL_curstash);
	230	cb_args[3] = found_name;
	231	cb_args[4] = found_proto;
0f070758	232	cb_args[5] = found_traits;
0f070758	233	cb_args[6] = NULL;
53e3ab32	234
	235	if (len && found_proto)
	236	in_declare = 2;
	237	else if (len \|\| found_proto)
	238	in_declare = 1;
	239	if (found_proto)
	240	PL_lex_stuff = Nullsv;
	241	s = skipspace(s);
	242	#ifdef DD_DEBUG
	243	printf("cur buf: %s\n", s);
	244	printf("bufend at: %i\n", PL_bufend - s);
	245	printf("linestr: %s\n", SvPVX(PL_linestr));
	246	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
	247	#endif
	248	if (*s++ == '{') {
	249	call_argv("Devel::Declare::init_declare", G_SCALAR, cb_args);
	250	SPAGAIN;
	251	retstr = POPpx;
	252	PUTBACK;
	253	if (retstr && strlen(retstr)) {
dcca2c59	254	const char* old_start = SvPVX(PL_linestr);
dcca2c59	255	int start_diff;
c5912dc7	256	const int old_len = SvCUR(PL_linestr);
0ba8c7aa	257	#ifdef DD_DEBUG
53e3ab32	258	printf("Got string %s\n", retstr);
0ba8c7aa	259	#endif
c5912dc7	260	SvGROW(PL_linestr, (STRLEN)(old_len + strlen(retstr)));
dcca2c59	261	if (start_diff = SvPVX(PL_linestr) - old_start) {
8314c6b3	262	Perl_croak(aTHX_ "forced to realloc PL_linestr for line %s, bailing out before we crash harder", SvPVX(PL_linestr));
dcca2c59	263	}
53e3ab32	264	memmove(s+strlen(retstr), s, (PL_bufend - s)+1);
53e3ab32	265	memmove(s, retstr, strlen(retstr));
c5912dc7	266	SvCUR_set(PL_linestr, old_len + strlen(retstr));
53e3ab32	267	PL_bufend += strlen(retstr);
	268	#ifdef DD_DEBUG
	269	printf("cur buf: %s\n", s);
dcca2c59	270	printf("PL_bufptr: %s\n", PL_bufptr);
53e3ab32	271	printf("bufend at: %i\n", PL_bufend - s);
	272	printf("linestr: %s\n", SvPVX(PL_linestr));
	273	printf("linestr len: %i\n", PL_bufend - SvPVX(PL_linestr));
dcca2c59	274	printf("tokenbuf now: %s\n", PL_tokenbuf);
53e3ab32	275	#endif
	276	}
	277	} else {
94caac6e	278	call_argv("Devel::Declare::init_declare", G_VOID\|G_DISCARD, cb_args);
94caac6e	279	}
53e3ab32	280	return o;
	281	}
	282
bedac9ff	283	STATIC OP (dd_old_ck_entereval)(pTHX_ OP *op);
bedac9ff	284
b7505981	285	OP* dd_pp_entereval(pTHX) {
	286	dSP;
	287	dPOPss;
	288	STRLEN len;
	289	const char* s;
	290	if (SvPOK(sv)) {
53e3ab32	291	#ifdef DD_DEBUG
b7505981	292	printf("mangling eval sv\n");
53e3ab32	293	#endif
b7505981	294	if (SvREADONLY(sv))
	295	sv = sv_2mortal(newSVsv(sv));
	296	s = SvPVX(sv);
	297	len = SvCUR(sv);
	298	if (!len \|\| s[len-1] != ';') {
	299	if (!(SvFLAGS(sv) & SVs_TEMP))
	300	sv = sv_2mortal(newSVsv(sv));
	301	sv_catpvn(sv, "\n;", 2);
53e3ab32	302	}
b7505981	303	SvGROW(sv, 8192);
53e3ab32	304	}
b7505981	305	PUSHs(sv);
	306	return PL_ppaddr[OP_ENTEREVAL](aTHX);
	307	}
53e3ab32	308
b7505981	309	STATIC OP dd_ck_entereval(pTHX_ OP o) {
b7505981	310	o = dd_old_ck_entereval(aTHX_ o); /* let the original do its job */
d8e65fc8	311	if (o->op_ppaddr == PL_ppaddr[OP_ENTEREVAL])
d8e65fc8	312	o->op_ppaddr = dd_pp_entereval;
94caac6e	313	return o;
	314	}
	315
6a0bcf35	316	static I32 dd_filter_realloc(pTHX_ int idx, SV *sv, int maxlen)
	317	{
	318	const I32 count = FILTER_READ(idx+1, sv, maxlen);
	319	SvGROW(sv, 8192); /* please try not to have a line longer than this :) */
	320	/* filter_del(dd_filter_realloc); */
	321	return count;
	322	}
	323
bedac9ff	324	STATIC OP (dd_old_ck_const)(pTHX_ OP*op);
	325
	326	STATIC OP dd_ck_const(pTHX_ OP o) {
	327	HV* is_declarator;
	328	SV** is_declarator_pack_ref;
	329	HV* is_declarator_pack_hash;
	330	SV** is_declarator_flag_ref;
	331	int dd_flags;
	332	char* s;
	333	char tmpbuf[sizeof PL_tokenbuf];
	334	char found_name[sizeof PL_tokenbuf];
	335	STRLEN len = 0;
	336
	337	o = dd_old_ck_const(aTHX_ o); /* let the original do its job */
	338
	339	is_declarator = get_hv("Devel::Declare::declarators", FALSE);
	340
	341	is_declarator_pack_ref = hv_fetch(is_declarator, HvNAME(PL_curstash),
	342	strlen(HvNAME(PL_curstash)), FALSE);
	343
	344	if (!is_declarator_pack_ref \|\| !SvROK(*is_declarator_pack_ref))
	345	return o; /* not a hashref */
	346
	347	is_declarator_pack_hash = (HV) SvRV(is_declarator_pack_ref);
	348
	349	/* don't try and look this up if it's not a string const */
	350	if (!SvPOK(cSVOPo->op_sv))
	351	return o;
	352
	353	is_declarator_flag_ref = hv_fetch(
	354	is_declarator_pack_hash, SvPVX(cSVOPo->op_sv),
	355	strlen(SvPVX(cSVOPo->op_sv)), FALSE
	356	);
	357
	358	/* requires SvIOK as well as TRUE since flags not being an int is useless */
	359
	360	if (!is_declarator_flag_ref
	361	\|\| !SvIOK(*is_declarator_flag_ref)
	362	\|\| !SvTRUE(*is_declarator_flag_ref))
	363	return o;
	364
	365	dd_flags = SvIVX(*is_declarator_flag_ref);
	366
	367	if (!(dd_flags & DD_HANDLE_NAME))
	368	return o; /* if we're not handling name, method intuiting not an issue */
	369
	370	#ifdef DD_DEBUG
	371	printf("Think I found a declarator %s\n", PL_tokenbuf);
	372	printf("linestr: %s\n", SvPVX(PL_linestr));
	373	#endif
	374
	375	s = PL_bufptr;
	376
	377	while (s < PL_bufend && isSPACE(*s)) s++;
	378	if (memEQ(s, PL_tokenbuf, strlen(PL_tokenbuf)))
	379	s += strlen(PL_tokenbuf);
	380
	381	DD_DEBUG_S
	382
	383	/* find next word */
	384
	385	s = skipspace(s);
	386
	387	DD_DEBUG_S
388
389	/* arg 4 is allow_package */
390
391	s = scan_word(s, tmpbuf, sizeof tmpbuf, dd_flags & DD_HANDLE_PACKAGE, &len);
392
393	DD_DEBUG_S
394
395	if (len) {
396	const char* old_start = SvPVX(PL_linestr);
397	int start_diff;
398	const int old_len = SvCUR(PL_linestr);
399
400	strcpy(found_name, tmpbuf);
401	#ifdef DD_DEBUG
402	printf("Found %s\n", found_name);
403	#endif
404
405	s -= len;
406	SvGROW(PL_linestr, (STRLEN)(old_len + 2));
407	if (start_diff = SvPVX(PL_linestr) - old_start) {
408	Perl_croak(aTHX_ "forced to realloc PL_linestr for line %s, bailing out before we crash harder", SvPVX(PL_linestr));
409	}
410	memmove(s+2, s, (PL_bufend - s)+1);
411	*s = ':';
412	s++;
413	*s = ':';
414	SvCUR_set(PL_linestr, old_len + 2);
415	PL_bufend += 2;
416	}
417	return o;
418	}
419
94caac6e	420	static int initialized = 0;
	421
	422	MODULE = Devel::Declare PACKAGE = Devel::Declare
	423
	424	PROTOTYPES: DISABLE
	425
	426	void
	427	setup()
	428	CODE:
	429	if (!initialized++) {
	430	dd_old_ck_rv2cv = PL_check[OP_RV2CV];
	431	PL_check[OP_RV2CV] = dd_ck_rv2cv;
b7505981	432	dd_old_ck_entereval = PL_check[OP_ENTEREVAL];
b7505981	433	PL_check[OP_ENTEREVAL] = dd_ck_entereval;
bedac9ff	434	dd_old_ck_const = PL_check[OP_CONST];
bedac9ff	435	PL_check[OP_CONST] = dd_ck_const;
94caac6e	436	}
6a0bcf35	437	filter_add(dd_filter_realloc, NULL);