server/server/freezethaw.C

/*****************************************************************************/
/*  CrossFire, A roguelike realtime multiplayer game                         */
/*****************************************************************************/

/*
 *  This code is placed under the GNU General Public Licence (GPL)
 *
 *  Copyright (C) 2006      by Marc Lehmann <crossfire@schmorp.de>
 *                                                                          
 *  This program is free software; you can redistribute it and/or modify    
 *  it under the terms of the GNU General Public License as published by    
 *  the Free Software Foundation; either version 2 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 GNU General Public License       
 *  along with this program; if not, write to the Free Software             
 *  Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA 
 */

#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 (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));

      add ((void *)"oid ", 4);
      add ((sint32)idx);
      add ('\n');
    }
}

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;
}

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;
}

int
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);
}

int
fputs (const char *s, object_freezer &freezer)
{
  freezer.add (s);
}

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

object_thawer::object_thawer (const char *path)
: name (strdup (path))
{
  static const char eof[] = "\n\n\n\0\0\0";

  av   = 0;
  text = 0;
  line = 0;

  if (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 (eof));
            SvCUR_set (text, len);
            memcpy (SvPVX (text), sv_, len);
            memcpy (SvEND (text), eof, sizeof (eof)); // just to be sure

            line = SvPVX (text);
          }
        }

      CALL_END;
    }
}

object_thawer::object_thawer (const char *data, AV *perlav)
: name (strdup ("(memory stream"))
{
  av   = perlav;
  text = newSVpv (data, 0);
  sv_catpv (text, thawer_eof);
  line = SvPVbyte_nolen (text);
}

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))
    {
      printf ("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");
      return;
    }

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

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

  free ((void *)name);
}

char *
fgets (char *s, int n, object_thawer &thawer)
{
  char *p = thawer.line;
  char *q = s;

  if (!p)
    return 0;

  while (--n)
    {
      if (!*p)
        break;

      *q++ = *p;

      if (*p++ == '\n')
        break;
    }

  *q = 0;
  thawer.line = p;

  return s == q ? 0 : s;
}

keyword
object_thawer::get_kv ()
{
  if (!line)
    return KW_EOF;

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

      if (!*p)
        return KW_EOF;

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

      int klen = p - line;

      if (*p++ != '\n')
        {
          // parse value
          while (*(unsigned char *)p <= ' ' && *p != '\n') // skip 0x01 .. 0x20
            ++p;

          last_value = p;

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

          *p++ = 0;
        }
      else
        last_value = 0;

      line [klen] = 0;
      keyword_idx *kw = kw_lex::match (line, klen);

      //printf ("KV %d<%s,%s>\n", kw ? kw->index : 0, line, last_value);//D

      last_keyword = line;
      line = p;

      if (kw)
        return kw->index;
      else if (!*last_keyword || *last_keyword == '#')
        ; // empty/comment line
      else
        return KW_ERROR;
    }
}

void
object_thawer::skip_kv (keyword kw)
{
  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;
    }
}
 
void
object_thawer::get (shstr &sh) const
{
  if (last_value)
    sh = last_value;
  else
    {
      sh = "<value missing>";
      LOG (llevError, "keyword \"%s\" requires value, substituting with <value missing>\n", last_keyword);//TODO: add filename
    }
}

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;

  // 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;

      line = end + keyword_len [kend] + 1;

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

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

  if (!p)
    return 0;

  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;
}

sint64
object_thawer::get_sint64 () const
{
  return last_value ? atoll (last_value) : 0;
}

double
object_thawer::get_double () const
{
  return last_value ? atof (last_value) : 0;
}

Revision:	1.7
Committed:	Tue Jan 23 03:56:45 2007 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+0 -4 lines
Log Message:	I knew there was an explanation
#	Content
1	/*****************************************************************************/
2	/* CrossFire, A roguelike realtime multiplayer game */
3	/*****************************************************************************/
4
5	/*
6	* This code is placed under the GNU General Public Licence (GPL)
7	*
8	* Copyright (C) 2006 by Marc Lehmann <crossfire@schmorp.de>
9	*
10	* This program is free software; you can redistribute it and/or modify
11	* it under the terms of the GNU General Public License as published by
12	* the Free Software Foundation; either version 2 of the License, or
13	* (at your option) any later version.
14	*
15	* This program is distributed in the hope that it will be useful,
16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	* GNU General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with this program; if not, write to the Free Software
22	* Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include "global.h" // bug in cfperl.h, doesn't include interface_class stuff
26	#include "logger.h"
27	#include "cfperl.h"
28	#include "kw_hash.h"
29
30	object_freezer::object_freezer ()
31	: dynbuf (128 * 1024, 64 * 1024)
32	{
33	av = newAV ();
34	}
35
36	object_freezer::~object_freezer ()
37	{
38	SvREFCNT_dec (av);
39	}
40
41	void
42	object_freezer::put (attachable *ext)
43	{
44	ext->optimise ();
45
46	if (ext->self)
47	{
48	int idx = AvFILLp ((AV *)av) + 1;
49	av_store (av, idx, newRV_inc ((SV *)ext->self));
50
51	add ((void *)"oid ", 4);
52	add ((sint32)idx);
53	add ('\n');
54	}
55	}
56
57	bool
58	object_freezer::save (const char *path)
59	{
60	CALL_BEGIN (3);
61	CALL_ARG_SV (newSVpv (path, 0));
62	CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
63	CALL_ARG_SV (newRV_inc ((SV *)av));
64	CALL_CALL ("cf::object_freezer_save", G_VOID \| G_DISCARD);
65	CALL_END;
66	}
67
68	char *
69	object_freezer::as_string ()
70	{
71	CALL_BEGIN (2);
72	CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
73	CALL_ARG_SV (newRV_inc ((SV *)av));
74	CALL_CALL ("cf::object_freezer_as_string", G_SCALAR);
75
76	char *res = count > 0
77	? strdup (SvPVX (POPs))
78	: strdup ("[fatal error]");
79
80	CALL_END;
81
82	return res;
83	}
84
85	int
86	fprintf (object_freezer &freezer, const char *format, ...)
87	{
88	va_list ap;
89
90	va_start (ap, format);
91
92	int len = vsnprintf ((char *)freezer.force (1024), 1024, format, ap);
93
94	if (len >= 0)
95	freezer.alloc (len);
96
97	va_end (ap);
98	}
99
100	int
101	fputs (const char *s, object_freezer &freezer)
102	{
103	freezer.add (s);
104	}
105
106	static const char thawer_eof[] = "\n\n\n\0\0\0";
107
108	object_thawer::object_thawer (const char *path)
109	: name (strdup (path))
110	{
111	static const char eof[] = "\n\n\n\0\0\0";
112
113	av = 0;
114	text = 0;
115	line = 0;
116
117	if (path)
118	{
119	CALL_BEGIN (1);
120	CALL_ARG_SV (newSVpv (path, 0));
121	CALL_CALL ("cf::object_thawer_load", G_ARRAY);
122
123	if (count == 2)
124	{
125	// second value - perl objects
126	{
127	SV *sv = POPs;
128	if (SvROK (sv))
129	av = (AV *)SvREFCNT_inc (SvRV (sv));
130	}
131
132	// first value - text part, pad with 3 zeroes
133	{
134	SV *sv = POPs;
135	STRLEN len;
136	char *sv_ = SvPVbyte (sv, len);
137	text = newSV (len + sizeof (eof));
138	SvCUR_set (text, len);
139	memcpy (SvPVX (text), sv_, len);
140	memcpy (SvEND (text), eof, sizeof (eof)); // just to be sure
141
142	line = SvPVX (text);
143	}
144	}
145
146	CALL_END;
147	}
148	}
149
150	object_thawer::object_thawer (const char data, AV perlav)
151	: name (strdup ("(memory stream"))
152	{
153	av = perlav;
154	text = newSVpv (data, 0);
155	sv_catpv (text, thawer_eof);
156	line = SvPVbyte_nolen (text);
157	}
158
159	void
160	object_thawer::get (attachable *obj, int oid)
161	{
162	if (!av \|\| oid < 0) // this is actually an error of sorts
163	return;
164
165	SV *svp = av_fetch ((AV )av, oid, 0);
166
167	if (!svp \|\| !SvROK (*svp))
168	{
169	printf ("trying to thaw duplicate or never-issued oid %d, ignoring.\n", oid);
170	return;
171	}
172
173	if (!SvROK (*svp))
174	{
175	LOG (llevError, "deserialised perl object is not an RV");
176	return;
177	}
178
179	HV hv = (HV )SvRV (*svp);
180
181	if (SvTYPE (hv) != SVt_PVHV)
182	{
183	LOG (llevError, "deserialised perl object is not a PVHV");
184	return;
185	}
186
187	if (obj->self)
188	{
189	// the hard way(?)
190
191	CALL_BEGIN (2);
192	CALL_ARG_SV (newRV_inc ((SV *)obj->self));
193	CALL_ARG_SV (newRV_inc ((SV *)hv));
194	PUTBACK;
195	call_method ("thawer_merge", G_DISCARD \| G_EVAL);
196	SPAGAIN;
197	CALL_END;
198	}
199	else
200	{
201	// the easy way(?)
202
203	obj->self = hv;
204	SvRV_set (*svp, &PL_sv_undef);
205
206	sv_magicext ((SV )obj->self, 0, PERL_MAGIC_ext, &attachable::vtbl, (char )obj, 0);
207	}
208
209	obj->reattach ();
210	}
211
212	object_thawer::~object_thawer ()
213	{
214	if (text) SvREFCNT_dec (text);
215	if (av) SvREFCNT_dec (av);
216
217	free ((void *)name);
218	}
219
220	char *
221	fgets (char *s, int n, object_thawer &thawer)
222	{
223	char *p = thawer.line;
224	char *q = s;
225
226	if (!p)
227	return 0;
228
229	while (--n)
230	{
231	if (!*p)
232	break;
233
234	q++ = p;
235
236	if (*p++ == '\n')
237	break;
238	}
239
240	*q = 0;
241	thawer.line = p;
242
243	return s == q ? 0 : s;
244	}
245
246	keyword
247	object_thawer::get_kv ()
248	{
249	if (!line)
250	return KW_EOF;
251
252	for (;;)
253	{
254	char *p = line;
255
256	if (!*p)
257	return KW_EOF;
258
259	// parse keyword
260	while (*p > ' ')
261	p++;
262
263	int klen = p - line;
264
265	if (*p++ != '\n')
266	{
267	// parse value
268	while ((unsigned char )p <= ' ' && *p != '\n') // skip 0x01 .. 0x20
269	++p;
270
271	last_value = p;
272
273	while (*p != '\n')
274	p++;
275
276	*p++ = 0;
277	}
278	else
279	last_value = 0;
280
281	line [klen] = 0;
282	keyword_idx *kw = kw_lex::match (line, klen);
283
284	//printf ("KV %d<%s,%s>\n", kw ? kw->index : 0, line, last_value);//D
285
286	last_keyword = line;
287	line = p;
288
289	if (kw)
290	return kw->index;
291	else if (!last_keyword \|\| last_keyword == '#')
292	; // empty/comment line
293	else
294	return KW_ERROR;
295	}
296	}
297
298	void
299	object_thawer::skip_kv (keyword kw)
300	{
301	shstr ml;
302
303	switch (kw)
304	{
305	case KW_msg: get_ml (KW_endmsg , ml); break;
306	case KW_lore: get_ml (KW_endlore , ml); break;
307	case KW_maplore: get_ml (KW_endmaplore, ml); break;
308	}
309	}
310
311	void
312	object_thawer::get (shstr &sh) const
313	{
314	if (last_value)
315	sh = last_value;
316	else
317	{
318	sh = "<value missing>";
319	LOG (llevError, "keyword \"%s\" requires value, substituting with <value missing>\n", last_keyword);//TODO: add filename
320	}
321	}
322
323	void
324	object_thawer::get_ml (keyword kend, shstr &sh)
325	{
326	char kw[128];
327
328	int klen = keyword_len [kend];
329
330	kw [0] = '\n';
331	memcpy (kw + 1, keyword_str [kend], klen);
332	kw [klen + 1] = '\n';
333	kw [klen + 2] = 0;
334
335	// first test for completely empty msg... "endXXX\n"
336	if (!strncmp (line, kw + 1, klen + 1))
337	{
338	sh = 0;
339
340	line += klen + 1;
341
342	return;
343	}
344	else
345	{
346	// multi-line strings are delimited by "\nendXXX\n" or "endXXX\n" (NULL)
347
348	char *end = strstr (line, kw);
349
350	if (!end)
351	{
352	sh = 0;
353	return;
354	}
355
356	*end = 0;
357	sh = line;
358
359	line = end + keyword_len [kend] + 1;
360
361	while (*line++ != '\n')
362	;
363	}
364	}
365
366	sint32
367	object_thawer::get_sint32 () const
368	{
369	char *p = last_value;
370
371	if (!p)
372	return 0;
373
374	sint32 val = 0;
375	bool negate;
376
377	if (*p == '-')
378	{
379	negate = true;
380	++p;
381	}
382	else
383	negate = false;
384
385	do
386	{
387	val *= 10;
388	val += *p++ - '0';
389	}
390	while (*p);
391
392	return negate ? -val : val;
393	}
394
395	sint64
396	object_thawer::get_sint64 () const
397	{
398	return last_value ? atoll (last_value) : 0;
399	}
400
401	double
402	object_thawer::get_double () const
403	{
404	return last_value ? atof (last_value) : 0;
405	}
406