server/server/freezethaw.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

#include "global.h" // bug in cfperl.h, doesn't include interface_class stuff
#include "logger.h"
#include "cfperl.h"
#include "kw_hash.h"

object_freezer::object_freezer ()
: dynbuf_text (128 * 1024, 64 * 1024)
{
  av = newAV ();
}

object_freezer::~object_freezer ()
{
  SvREFCNT_dec (av);
}

void
object_freezer::put_ (attachable *ext)
{
  ext->optimise ();

  if (ext->self)
    {
      int idx = AvFILLp ((AV *)av) + 1;
      av_store (av, idx, newRV_inc ((SV *)ext->self));

      put (KW(oid), sint32(idx));
    }
}

bool
object_freezer::save (const char *path)
{
  CALL_BEGIN (3);
  CALL_ARG_SV (newSVpv (path, 0));
  CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
  CALL_ARG_SV (newRV_inc ((SV *)av));
  CALL_CALL ("cf::object_freezer_save", G_VOID | G_DISCARD);
  CALL_END;

  return 1;
}

char *
object_freezer::as_string ()
{
  CALL_BEGIN (2);
  CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
  CALL_ARG_SV (newRV_inc ((SV *)av));
  CALL_CALL ("cf::object_freezer_as_string", G_SCALAR);

  char *res = count > 0
                ? strdup (SvPVX (POPs))
                : strdup ("[fatal error]");

  CALL_END;

  return res;
}

#if 0
void
fprintf (object_freezer &freezer, const char *format, ...)
{
  va_list ap;

  va_start (ap, format);

  int len = vsnprintf ((char *)freezer.force (1024), 1024, format, ap);

  if (len >= 0)
    freezer.alloc (len);

  va_end (ap);
}

// XXX: function not returning an int
void
fputs (const char *s, object_freezer &freezer)
{
  freezer.add (s);
}
#endif

static const char thawer_eof[] = "\n\n\n\0\0\0";

bool object_thawer::errors_are_fatal = true;

object_thawer::object_thawer (const char *data, AV *perlav)
: name (strdup ("(memory stream)"))
{
  init ("(memory stream)");

  av   = perlav;
  text = newSVpv (data, 0); sv_catpv (text, thawer_eof);
  line = SvPVbyte_nolen (text);
  next ();
}

object_thawer::object_thawer (const_utf8_string path)
{
  init_from_file (path);
}

// convenience constructor
object_thawer::object_thawer (const_utf8_string dir, const_utf8_string file)
{
  init_from_file (format ("%s/%s", dir, file));
}

void
object_thawer::init (const_utf8_string path)
{
  name    = strdup (path);
  av      = 0;
  text    = 0;
  line    = 0;
  linenum = 0;

  kw      = KW_ERROR;
  kw_str  = 0;
  value   = 0;
}

void
object_thawer::init_from_file (const_utf8_string path)
{
  init (path);

  CALL_BEGIN (1);
  CALL_ARG_SV (newSVpv (path, 0));
  CALL_CALL ("cf::object_thawer_load", G_ARRAY);

  if (count == 2)
    {
      // second value - perl objects
      {
        SV *sv = POPs;
        if (SvROK (sv))
          av = (AV *)SvREFCNT_inc (SvRV (sv));
      }

      // first value - text part, pad with 3 zeroes
      {
        SV *sv = POPs;
        STRLEN len;
        char *sv_ = SvPVbyte (sv, len);
        text = newSV (len + sizeof (thawer_eof));
        SvCUR_set (text, len + sizeof (thawer_eof));
        memcpy (SvPVX (text), sv_, len);
        memcpy (SvPVX (text) + len, thawer_eof, sizeof (thawer_eof));

        line = SvPVX (text);
        next ();
      }
    }

  CALL_END;
}

void
object_thawer::get (attachable *obj, int oid)
{
  if (!av || oid < 0) // this is actually an error of sorts
    return;

  SV **svp = av_fetch ((AV *)av, oid, 0);

  if (!svp || !SvROK (*svp))
    {
      LOG (llevError, "trying to thaw duplicate or never-issued oid %d, ignoring.\n", oid);
      return;
    }

  if (!SvROK (*svp))
    {
      LOG (llevError, "deserialised perl object is not an RV\n");
      return;
    }

  HV *hv = (HV *)SvRV (*svp);

  if (SvTYPE (hv) != SVt_PVHV)
    {
      LOG (llevError, "deserialised perl object is not a PVHV\n");
      return;
    }

  if (obj->self)
    {
      // the hard way(?)

      CALL_BEGIN (2);
      CALL_ARG_SV (newRV_inc ((SV *)obj->self));
      CALL_ARG_SV (newRV_inc ((SV *)hv));
      PUTBACK;
      call_method ("thawer_merge", G_DISCARD | G_EVAL);
      SPAGAIN;
      CALL_END;
    }
  else
    {
      // the easy way(?)

      obj->self = hv;
      SvRV_set (*svp, &PL_sv_undef);

      sv_magicext ((SV *)obj->self, 0, PERL_MAGIC_ext, &attachable::vtbl, (char *)obj, 0);
    }

  obj->reattach ();
}

object_thawer::~object_thawer ()
{
  if (text) SvREFCNT_dec (text);
  if (av)   SvREFCNT_dec (av);

  resolve_delayed_derefs (false);

  free ((void *)name);
}

static void
error_out ()
{
  if (object_thawer::errors_are_fatal)
    {
      LOG (llevError, "(parse errors at this time are fatal, exiting)");
      exit (1);
    }
}

void
object_thawer::parse_warn (const char *msg) const
{
  LOG (llevWarn, "%s:%d, \"%s %s\": %s\n",
       this->name, linenum,
       kw_str ? kw_str : "<null>",
       value  ? value  : "<null>",
       msg);
}

bool
object_thawer::parse_error (const char *type, const char *name, bool skip) const
{
  if (!type) type = "file section";
  if (!name) name = "generic";

  switch (kw)
    {
      case KW_EOF:
        LOG (llevError, "%s:%d end of file while reading %s '%s', aborting load.\n",
             this->name, linenum, type, name);
        error_out ();
        return false;

      case KW_ERROR:
        LOG (llevError, "%s:%d error while reading %s '%s', at '%s', aborting load.\n",
             this->name, linenum,
             type, name,
             kw_str ? kw_str : "<file load>");
        error_out ();
        return false;

      default:
        LOG (llevError, "%s:%d unexpected line (%s %s) while reading %s '%s', %s.\n",
             this->name, linenum,
             kw_str ? kw_str : "<null>",
             value  ? value  : "<null>",
             type, name,
             skip ? "skipping line" : "aborting load");
        error_out ();
        return skip;
    }
}

void
object_thawer::next ()
{
  if (!line)
    {
      kw = KW_ERROR;
      return;
    }

  for (;;)
    {
      char *p = line;

      if (expect_false (*p <= ' '))
        {
          // skip whitespace (only some files need this)
          while (*p == ' ' || *p == '\t')
            p++;

          line = p;
        }

      if (!*p)
        {
          kw = KW_EOF;
          break;
        }

      // parse keyword
      while (*p > ' ')
        p++;

      int klen = p - line;

      value_nn = "";
      value = 0;

      if (*p++ != '\n')
        {
          // parse value
          while (*(unsigned char *)p <= ' ' && *p != '\n')
            ++p;

          value_nn = value = p;

          while (*p != '\n')
            p++;

          *p++ = 0;
        }

      ++linenum;
      line [klen] = 0;
      keyword_idx *kw_idx = kw_lex::match (line, klen);

      kw_str = line;
      line = p;

      if (kw_idx)
        {
          kw = kw_idx->index;
          break;
        }
      else if (!*kw_str || *kw_str == '#')
        ; // empty/comment line
      else
        {
          kw = KW_ERROR;
          break;
        }
    }
}

bool
object_thawer::next_line ()
{
  if (!line)
    {
      kw = KW_ERROR;
      return 0;
    }

  for (;;)
    {
      char *p = line;

      if (expect_false (*p <= ' '))
        {
          // skip whitespace (only some files need this)
          while (*p == ' ' || *p == '\t')
            p++;

          line = p;
        }

      if (!*p)
        {
          kw = KW_EOF;
          return 0;
        }

      kw       = KW_value;
      kw_str   = p;
      value_nn = p;
      value    = p;

      // parse till newline
      while (*p > '\n')
        p++;

      if (*p == '\n')
        *p++ = 0;

      ++linenum;

      line = p;

      if (*kw_str && *kw_str != '#')
        break;

      // empty/comment line -> skip it
    }

  return 1;
}

void
object_thawer::skip ()
{
  shstr ml;

  switch (kw)
    {
      case KW_msg:     get_ml (KW_endmsg    , ml); break;
      case KW_lore:    get_ml (KW_endlore   , ml); break;
      case KW_maplore: get_ml (KW_endmaplore, ml); break;
      default:                                     break;
    }

  next ();
}
 
void
object_thawer::skip_block ()
{
  // must not stop at KW_ERROR, as those signify custom keys
  while (kw != KW_EOF)
    {
      keyword w = kw;
      skip ();

      if (0 && (w == KW_map || w == KW_arch || w == KW_object || w == KW_region))
        skip_block ();
      else if (w == KW_end)
        break;
    }
}

void
object_thawer::get_ml (keyword kend, shstr &sh)
{
  char kw[128];

  int klen = keyword_len [kend];

  kw [0] = '\n';
  memcpy (kw + 1, keyword_str [kend], klen);
  kw [klen + 1] = '\n';
  kw [klen + 2] = 0;

  ++linenum;

  // first test for completely empty msg... "endXXX\n"
  if (!strncmp (line, kw + 1, klen + 1))
    {
      sh = 0;

      line += klen + 1;

      return;
    }
  else
    {
      // multi-line strings are delimited by "\nendXXX\n" or "endXXX\n" (NULL)

      char *end = strstr (line, kw);

      if (!end)
        {
          sh = 0;
          return;
        }

      *end = 0;
      sh = line;

      // count line numbers
      while (line < end)
        linenum += *line++ == '\n';

      line += keyword_len [kend];

      while (*line++ != '\n')
        ;

      ++linenum;
    }
}

sint32
object_thawer::get_sint32 () const
{
  const char *p = value_nn;

  sint32 val = 0;
  bool negate;

  if (*p == '-')
    {
      negate = true;
      ++p;
    }
  else
    negate = false;

  do
    {
      val *= 10;
      val += *p++ - '0';
    }
  while (*p);

  return negate ? -val : val;
}

void
object_thawer::delayed_deref (attachable *op, object_ptr &ptr, const char *ref)
{
  op->refcnt_inc ();
  delayed_ref r = { op, &ptr, ref ? strdup (ref) : 0 };
  delrefs.push_back (r);
  ptr = 0;
}

void
object_thawer::resolve_delayed_derefs (bool deref)
{
  while (!delrefs.empty ())
    {
      delayed_ref r = delrefs.back ();
      delrefs.pop_back ();

      if (deref)
        *r.ptr = object::deref (r.ref);

      free ((void *)r.ref);
      r.op->refcnt_dec ();
    }
}
Revision:	1.44
Committed:	Sat Apr 23 04:56:56 2011 UTC (13 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.43:	+1 -1 lines
Log Message:	update copyright to 2011
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	*
6	* Deliantra is free software: you can redistribute it and/or modify it under
7	* the terms of the Affero GNU General Public License as published by the
8	* Free Software Foundation, either version 3 of the License, or (at your
9	* option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the Affero GNU General Public License
17	* and the GNU General Public License along with this program. If not, see
18	* <http://www.gnu.org/licenses/>.
19	*
20	* The authors can be reached via e-mail to <support@deliantra.net>
21	*/
22
23	#include "global.h" // bug in cfperl.h, doesn't include interface_class stuff
24	#include "logger.h"
25	#include "cfperl.h"
26	#include "kw_hash.h"
27
28	object_freezer::object_freezer ()
29	: dynbuf_text (128 * 1024, 64 * 1024)
30	{
31	av = newAV ();
32	}
33
34	object_freezer::~object_freezer ()
35	{
36	SvREFCNT_dec (av);
37	}
38
39	void
40	object_freezer::put_ (attachable *ext)
41	{
42	ext->optimise ();
43
44	if (ext->self)
45	{
46	int idx = AvFILLp ((AV *)av) + 1;
47	av_store (av, idx, newRV_inc ((SV *)ext->self));
48
49	put (KW(oid), sint32(idx));
50	}
51	}
52
53	bool
54	object_freezer::save (const char *path)
55	{
56	CALL_BEGIN (3);
57	CALL_ARG_SV (newSVpv (path, 0));
58	CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
59	CALL_ARG_SV (newRV_inc ((SV *)av));
60	CALL_CALL ("cf::object_freezer_save", G_VOID \| G_DISCARD);
61	CALL_END;
62
63	return 1;
64	}
65
66	char *
67	object_freezer::as_string ()
68	{
69	CALL_BEGIN (2);
70	CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
71	CALL_ARG_SV (newRV_inc ((SV *)av));
72	CALL_CALL ("cf::object_freezer_as_string", G_SCALAR);
73
74	char *res = count > 0
75	? strdup (SvPVX (POPs))
76	: strdup ("[fatal error]");
77
78	CALL_END;
79
80	return res;
81	}
82
83	#if 0
84	void
85	fprintf (object_freezer &freezer, const char *format, ...)
86	{
87	va_list ap;
88
89	va_start (ap, format);
90
91	int len = vsnprintf ((char *)freezer.force (1024), 1024, format, ap);
92
93	if (len >= 0)
94	freezer.alloc (len);
95
96	va_end (ap);
97	}
98
99	// XXX: function not returning an int
100	void
101	fputs (const char *s, object_freezer &freezer)
102	{
103	freezer.add (s);
104	}
105	#endif
106
107	static const char thawer_eof[] = "\n\n\n\0\0\0";
108
109	bool object_thawer::errors_are_fatal = true;
110
111	object_thawer::object_thawer (const char data, AV perlav)
112	: name (strdup ("(memory stream)"))
113	{
114	init ("(memory stream)");
115
116	av = perlav;
117	text = newSVpv (data, 0); sv_catpv (text, thawer_eof);
118	line = SvPVbyte_nolen (text);
119	next ();
120	}
121
122	object_thawer::object_thawer (const_utf8_string path)
123	{
124	init_from_file (path);
125	}
126
127	// convenience constructor
128	object_thawer::object_thawer (const_utf8_string dir, const_utf8_string file)
129	{
130	init_from_file (format ("%s/%s", dir, file));
131	}
132
133	void
134	object_thawer::init (const_utf8_string path)
135	{
136	name = strdup (path);
137	av = 0;
138	text = 0;
139	line = 0;
140	linenum = 0;
141
142	kw = KW_ERROR;
143	kw_str = 0;
144	value = 0;
145	}
146
147	void
148	object_thawer::init_from_file (const_utf8_string path)
149	{
150	init (path);
151
152	CALL_BEGIN (1);
153	CALL_ARG_SV (newSVpv (path, 0));
154	CALL_CALL ("cf::object_thawer_load", G_ARRAY);
155
156	if (count == 2)
157	{
158	// second value - perl objects
159	{
160	SV *sv = POPs;
161	if (SvROK (sv))
162	av = (AV *)SvREFCNT_inc (SvRV (sv));
163	}
164
165	// first value - text part, pad with 3 zeroes
166	{
167	SV *sv = POPs;
168	STRLEN len;
169	char *sv_ = SvPVbyte (sv, len);
170	text = newSV (len + sizeof (thawer_eof));
171	SvCUR_set (text, len + sizeof (thawer_eof));
172	memcpy (SvPVX (text), sv_, len);
173	memcpy (SvPVX (text) + len, thawer_eof, sizeof (thawer_eof));
174
175	line = SvPVX (text);
176	next ();
177	}
178	}
179
180	CALL_END;
181	}
182
183	void
184	object_thawer::get (attachable *obj, int oid)
185	{
186	if (!av \|\| oid < 0) // this is actually an error of sorts
187	return;
188
189	SV *svp = av_fetch ((AV )av, oid, 0);
190
191	if (!svp \|\| !SvROK (*svp))
192	{
193	LOG (llevError, "trying to thaw duplicate or never-issued oid %d, ignoring.\n", oid);
194	return;
195	}
196
197	if (!SvROK (*svp))
198	{
199	LOG (llevError, "deserialised perl object is not an RV\n");
200	return;
201	}
202
203	HV hv = (HV )SvRV (*svp);
204
205	if (SvTYPE (hv) != SVt_PVHV)
206	{
207	LOG (llevError, "deserialised perl object is not a PVHV\n");
208	return;
209	}
210
211	if (obj->self)
212	{
213	// the hard way(?)
214
215	CALL_BEGIN (2);
216	CALL_ARG_SV (newRV_inc ((SV *)obj->self));
217	CALL_ARG_SV (newRV_inc ((SV *)hv));
218	PUTBACK;
219	call_method ("thawer_merge", G_DISCARD \| G_EVAL);
220	SPAGAIN;
221	CALL_END;
222	}
223	else
224	{
225	// the easy way(?)
226
227	obj->self = hv;
228	SvRV_set (*svp, &PL_sv_undef);
229
230	sv_magicext ((SV )obj->self, 0, PERL_MAGIC_ext, &attachable::vtbl, (char )obj, 0);
231	}
232
233	obj->reattach ();
234	}
235
236	object_thawer::~object_thawer ()
237	{
238	if (text) SvREFCNT_dec (text);
239	if (av) SvREFCNT_dec (av);
240
241	resolve_delayed_derefs (false);
242
243	free ((void *)name);
244	}
245
246	static void
247	error_out ()
248	{
249	if (object_thawer::errors_are_fatal)
250	{
251	LOG (llevError, "(parse errors at this time are fatal, exiting)");
252	exit (1);
253	}
254	}
255
256	void
257	object_thawer::parse_warn (const char *msg) const
258	{
259	LOG (llevWarn, "%s:%d, \"%s %s\": %s\n",
260	this->name, linenum,
261	kw_str ? kw_str : "<null>",
262	value ? value : "<null>",
263	msg);
264	}
265
266	bool
267	object_thawer::parse_error (const char type, const char name, bool skip) const
268	{
269	if (!type) type = "file section";
270	if (!name) name = "generic";
271
272	switch (kw)
273	{
274	case KW_EOF:
275	LOG (llevError, "%s:%d end of file while reading %s '%s', aborting load.\n",
276	this->name, linenum, type, name);
277	error_out ();
278	return false;
279
280	case KW_ERROR:
281	LOG (llevError, "%s:%d error while reading %s '%s', at '%s', aborting load.\n",
282	this->name, linenum,
283	type, name,
284	kw_str ? kw_str : "<file load>");
285	error_out ();
286	return false;
287
288	default:
289	LOG (llevError, "%s:%d unexpected line (%s %s) while reading %s '%s', %s.\n",
290	this->name, linenum,
291	kw_str ? kw_str : "<null>",
292	value ? value : "<null>",
293	type, name,
294	skip ? "skipping line" : "aborting load");
295	error_out ();
296	return skip;
297	}
298	}
299
300	void
301	object_thawer::next ()
302	{
303	if (!line)
304	{
305	kw = KW_ERROR;
306	return;
307	}
308
309	for (;;)
310	{
311	char *p = line;
312
313	if (expect_false (*p <= ' '))
314	{
315	// skip whitespace (only some files need this)
316	while (p == ' ' \|\| p == '\t')
317	p++;
318
319	line = p;
320	}
321
322	if (!*p)
323	{
324	kw = KW_EOF;
325	break;
326	}
327
328	// parse keyword
329	while (*p > ' ')
330	p++;
331
332	int klen = p - line;
333
334	value_nn = "";
335	value = 0;
336
337	if (*p++ != '\n')
338	{
339	// parse value
340	while ((unsigned char )p <= ' ' && *p != '\n')
341	++p;
342
343	value_nn = value = p;
344
345	while (*p != '\n')
346	p++;
347
348	*p++ = 0;
349	}
350
351	++linenum;
352	line [klen] = 0;
353	keyword_idx *kw_idx = kw_lex::match (line, klen);
354
355	kw_str = line;
356	line = p;
357
358	if (kw_idx)
359	{
360	kw = kw_idx->index;
361	break;
362	}
363	else if (!kw_str \|\| kw_str == '#')
364	; // empty/comment line
365	else
366	{
367	kw = KW_ERROR;
368	break;
369	}
370	}
371	}
372
373	bool
374	object_thawer::next_line ()
375	{
376	if (!line)
377	{
378	kw = KW_ERROR;
379	return 0;
380	}
381
382	for (;;)
383	{
384	char *p = line;
385
386	if (expect_false (*p <= ' '))
387	{
388	// skip whitespace (only some files need this)
389	while (p == ' ' \|\| p == '\t')
390	p++;
391
392	line = p;
393	}
394
395	if (!*p)
396	{
397	kw = KW_EOF;
398	return 0;
399	}
400
401	kw = KW_value;
402	kw_str = p;
403	value_nn = p;
404	value = p;
405
406	// parse till newline
407	while (*p > '\n')
408	p++;
409
410	if (*p == '\n')
411	*p++ = 0;
412
413	++linenum;
414
415	line = p;
416
417	if (kw_str && kw_str != '#')
418	break;
419
420	// empty/comment line -> skip it
421	}
422
423	return 1;
424	}
425
426	void
427	object_thawer::skip ()
428	{
429	shstr ml;
430
431	switch (kw)
432	{
433	case KW_msg: get_ml (KW_endmsg , ml); break;
434	case KW_lore: get_ml (KW_endlore , ml); break;
435	case KW_maplore: get_ml (KW_endmaplore, ml); break;
436	default: break;
437	}
438
439	next ();
440	}
441
442	void
443	object_thawer::skip_block ()
444	{
445	// must not stop at KW_ERROR, as those signify custom keys
446	while (kw != KW_EOF)
447	{
448	keyword w = kw;
449	skip ();
450
451	if (0 && (w == KW_map \|\| w == KW_arch \|\| w == KW_object \|\| w == KW_region))
452	skip_block ();
453	else if (w == KW_end)
454	break;
455	}
456	}
457
458	void
459	object_thawer::get_ml (keyword kend, shstr &sh)
460	{
461	char kw[128];
462
463	int klen = keyword_len [kend];
464
465	kw [0] = '\n';
466	memcpy (kw + 1, keyword_str [kend], klen);
467	kw [klen + 1] = '\n';
468	kw [klen + 2] = 0;
469
470	++linenum;
471
472	// first test for completely empty msg... "endXXX\n"
473	if (!strncmp (line, kw + 1, klen + 1))
474	{
475	sh = 0;
476
477	line += klen + 1;
478
479	return;
480	}
481	else
482	{
483	// multi-line strings are delimited by "\nendXXX\n" or "endXXX\n" (NULL)
484
485	char *end = strstr (line, kw);
486
487	if (!end)
488	{
489	sh = 0;
490	return;
491	}
492
493	*end = 0;
494	sh = line;
495
496	// count line numbers
497	while (line < end)
498	linenum += *line++ == '\n';
499
500	line += keyword_len [kend];
501
502	while (*line++ != '\n')
503	;
504
505	++linenum;
506	}
507	}
508
509	sint32
510	object_thawer::get_sint32 () const
511	{
512	const char *p = value_nn;
513
514	sint32 val = 0;
515	bool negate;
516
517	if (*p == '-')
518	{
519	negate = true;
520	++p;
521	}
522	else
523	negate = false;
524
525	do
526	{
527	val *= 10;
528	val += *p++ - '0';
529	}
530	while (*p);
531
532	return negate ? -val : val;
533	}
534
535	void
536	object_thawer::delayed_deref (attachable op, object_ptr &ptr, const char ref)
537	{
538	op->refcnt_inc ();
539	delayed_ref r = { op, &ptr, ref ? strdup (ref) : 0 };
540	delrefs.push_back (r);
541	ptr = 0;
542	}
543
544	void
545	object_thawer::resolve_delayed_derefs (bool deref)
546	{
547	while (!delrefs.empty ())
548	{
549	delayed_ref r = delrefs.back ();
550	delrefs.pop_back ();
551
552	if (deref)
553	*r.ptr = object::deref (r.ref);
554
555	free ((void *)r.ref);
556	r.op->refcnt_dec ();
557	}
558	}