server/server/freezethaw.C

/*
 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
 * 
 * Copyright (©) 2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
 * 
 * Crossfire TRT 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 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 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 <crossfire@schmorp.de>
 */

#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));

      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;

  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";

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;
  linenum = 0;

  kw      = KW_ERROR;
  kw_str  = 0;
  value   = 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))
    {
      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);

  free ((void *)name);
}

//TODO: remove
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')
        {
          ++thawer.linenum;
          break;
        }
    }

  *q = 0;
  thawer.line = p;

  return s == q ? 0 : s;
}

bool
object_thawer::parse_error (const char *type, const char *name, bool skip)
{
  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);
        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>");
        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");
        return skip;
    }
}

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

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

      if (*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;
        }
    }
}

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::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
{
  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;
}

Revision:	1.23
Committed:	Tue Jul 24 20:06:23 2007 UTC (16 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+1 -1 lines
Log Message:	typo
#	User	Rev	Content
1	root	1.1	/*
2	root	1.21	* This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3			*
4			* Copyright (©) 2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
5			*
6	root	1.22	* Crossfire TRT is free software: you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation, either version 3 of the License, or
9			* (at your option) any later version.
10	root	1.21	*
11	root	1.22	* 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	root	1.21	*
16	root	1.22	* You should have received a copy of the GNU General Public License
17			* along with this program. If not, see <http://www.gnu.org/licenses/>.
18	root	1.21	*
19			* The authors can be reached via e-mail to <crossfire@schmorp.de>
20	root	1.1	*/
21
22	root	1.4	#include "global.h" // bug in cfperl.h, doesn't include interface_class stuff
23	root	1.1	#include "logger.h"
24			#include "cfperl.h"
25			#include "kw_hash.h"
26
27			object_freezer::object_freezer ()
28	root	1.17	: dynbuf_text (128 * 1024, 64 * 1024)
29	root	1.1	{
30			av = newAV ();
31			}
32
33			object_freezer::~object_freezer ()
34			{
35			SvREFCNT_dec (av);
36			}
37
38	root	1.4	void
39			object_freezer::put (attachable *ext)
40	root	1.1	{
41			ext->optimise ();
42
43			if (ext->self)
44			{
45			int idx = AvFILLp ((AV *)av) + 1;
46			av_store (av, idx, newRV_inc ((SV *)ext->self));
47
48			add ((void *)"oid ", 4);
49			add ((sint32)idx);
50			add ('\n');
51			}
52			}
53
54	root	1.4	bool
55			object_freezer::save (const char *path)
56	root	1.1	{
57			CALL_BEGIN (3);
58	root	1.4	CALL_ARG_SV (newSVpv (path, 0));
59	root	1.1	CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
60			CALL_ARG_SV (newRV_inc ((SV *)av));
61			CALL_CALL ("cf::object_freezer_save", G_VOID \| G_DISCARD);
62			CALL_END;
63	root	1.13
64			return 1;
65	root	1.1	}
66
67	root	1.4	char *
68			object_freezer::as_string ()
69	root	1.1	{
70			CALL_BEGIN (2);
71			CALL_ARG_SV (newRV_noinc (newSVpvn ((char *)linearise (), size ())));
72			CALL_ARG_SV (newRV_inc ((SV *)av));
73			CALL_CALL ("cf::object_freezer_as_string", G_SCALAR);
74
75			char *res = count > 0
76	root	1.3	? strdup (SvPVX (POPs))
77	root	1.1	: strdup ("[fatal error]");
78
79			CALL_END;
80
81			return res;
82			}
83
84	root	1.20	#if 0
85	root	1.13	void
86	root	1.4	fprintf (object_freezer &freezer, const char *format, ...)
87	root	1.1	{
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	pippijn	1.12	// XXX: function not returning an int
101	root	1.13	void
102	root	1.4	fputs (const char *s, object_freezer &freezer)
103	root	1.1	{
104			freezer.add (s);
105			}
106	root	1.20	#endif
107	root	1.1
108			static const char thawer_eof[] = "\n\n\n\0\0\0";
109
110	root	1.4	object_thawer::object_thawer (const char *path)
111			: name (strdup (path))
112	root	1.1	{
113			static const char eof[] = "\n\n\n\0\0\0";
114
115	root	1.10	av = 0;
116			text = 0;
117			line = 0;
118	root	1.8	linenum = 0;
119	root	1.1
120	root	1.10	kw = KW_ERROR;
121			kw_str = 0;
122			value = 0;
123
124	root	1.4	if (path)
125	root	1.1	{
126			CALL_BEGIN (1);
127	root	1.4	CALL_ARG_SV (newSVpv (path, 0));
128	root	1.1	CALL_CALL ("cf::object_thawer_load", G_ARRAY);
129
130			if (count == 2)
131			{
132			// second value - perl objects
133			{
134			SV *sv = POPs;
135			if (SvROK (sv))
136			av = (AV *)SvREFCNT_inc (SvRV (sv));
137			}
138
139			// first value - text part, pad with 3 zeroes
140			{
141			SV *sv = POPs;
142			STRLEN len;
143			char *sv_ = SvPVbyte (sv, len);
144			text = newSV (len + sizeof (eof));
145			SvCUR_set (text, len);
146			memcpy (SvPVX (text), sv_, len);
147			memcpy (SvEND (text), eof, sizeof (eof)); // just to be sure
148
149			line = SvPVX (text);
150			}
151			}
152
153			CALL_END;
154			}
155			}
156
157			object_thawer::object_thawer (const char data, AV perlav)
158	root	1.23	: name (strdup ("(memory stream)"))
159	root	1.1	{
160			av = perlav;
161			text = newSVpv (data, 0);
162			sv_catpv (text, thawer_eof);
163			line = SvPVbyte_nolen (text);
164			}
165
166	root	1.4	void
167			object_thawer::get (attachable *obj, int oid)
168	root	1.1	{
169			if (!av \|\| oid < 0) // this is actually an error of sorts
170			return;
171
172			SV *svp = av_fetch ((AV )av, oid, 0);
173
174			if (!svp \|\| !SvROK (*svp))
175			{
176	root	1.15	LOG (llevError, "trying to thaw duplicate or never-issued oid %d, ignoring.\n", oid);
177	root	1.1	return;
178			}
179
180			if (!SvROK (*svp))
181			{
182	root	1.15	LOG (llevError, "deserialised perl object is not an RV\n");
183	root	1.1	return;
184			}
185
186			HV hv = (HV )SvRV (*svp);
187
188			if (SvTYPE (hv) != SVt_PVHV)
189			{
190	root	1.15	LOG (llevError, "deserialised perl object is not a PVHV\n");
191	root	1.1	return;
192			}
193
194			if (obj->self)
195			{
196			// the hard way(?)
197
198	root	1.6	CALL_BEGIN (2);
199			CALL_ARG_SV (newRV_inc ((SV *)obj->self));
200			CALL_ARG_SV (newRV_inc ((SV *)hv));
201			PUTBACK;
202			call_method ("thawer_merge", G_DISCARD \| G_EVAL);
203			SPAGAIN;
204			CALL_END;
205	root	1.1	}
206			else
207			{
208			// the easy way(?)
209
210			obj->self = hv;
211			SvRV_set (*svp, &PL_sv_undef);
212
213			sv_magicext ((SV )obj->self, 0, PERL_MAGIC_ext, &attachable::vtbl, (char )obj, 0);
214			}
215
216			obj->reattach ();
217			}
218
219			object_thawer::~object_thawer ()
220			{
221			if (text) SvREFCNT_dec (text);
222			if (av) SvREFCNT_dec (av);
223	root	1.4
224			free ((void *)name);
225	root	1.1	}
226
227	root	1.8	//TODO: remove
228	root	1.4	char *
229			fgets (char *s, int n, object_thawer &thawer)
230	root	1.1	{
231			char *p = thawer.line;
232			char *q = s;
233
234			if (!p)
235			return 0;
236
237			while (--n)
238			{
239			if (!*p)
240			break;
241
242			q++ = p;
243
244			if (*p++ == '\n')
245	root	1.8	{
246			++thawer.linenum;
247			break;
248			}
249	root	1.1	}
250
251			*q = 0;
252			thawer.line = p;
253
254			return s == q ? 0 : s;
255			}
256
257	root	1.8	bool
258	root	1.10	object_thawer::parse_error (const char type, const char name, bool skip)
259	root	1.8	{
260			if (!type) type = "file section";
261			if (!name) name = "generic";
262
263			switch (kw)
264			{
265			case KW_EOF:
266			LOG (llevError, "%s:%d end of file while reading %s '%s', aborting load.\n",
267			this->name, linenum, type, name);
268			return false;
269
270			case KW_ERROR:
271	root	1.10	LOG (llevError, "%s:%d error while reading %s '%s', at '%s', aborting load.\n",
272	root	1.8	this->name, linenum,
273	root	1.10	type, name,
274			kw_str ? kw_str : "<file load>");
275	root	1.8	return false;
276
277			default:
278	root	1.9	LOG (llevError, "%s:%d unexpected line (%s %s) while reading %s '%s', %s.\n",
279	root	1.8	this->name, linenum,
280	root	1.10	kw_str ? kw_str : "<null>",
281			value ? value : "<null>",
282	root	1.8	type, name,
283			skip ? "skipping line" : "aborting load");
284			return skip;
285			}
286			}
287
288	root	1.10	void
289	root	1.11	object_thawer::next ()
290	root	1.1	{
291			if (!line)
292	root	1.10	{
293			kw = KW_ERROR;
294			return;
295			}
296	root	1.1
297			for (;;)
298			{
299			char *p = line;
300
301	root	1.16	if (*p <= ' ')
302			{
303			// skip whitespace (only some files need this)
304			while (p == ' ' \|\| p == '\t')
305			p++;
306
307			line = p;
308			}
309
310	root	1.1	if (!*p)
311	root	1.10	{
312			kw = KW_EOF;
313			break;
314			}
315	root	1.1
316			// parse keyword
317			while (*p > ' ')
318			p++;
319
320			int klen = p - line;
321
322	root	1.19	value_nn = "";
323	root	1.16	value = 0;
324
325	root	1.1	if (*p++ != '\n')
326			{
327			// parse value
328	root	1.16	while ((unsigned char )p <= ' ' && *p != '\n')
329	root	1.1	++p;
330
331	root	1.19	value_nn = value = p;
332	root	1.1
333			while (*p != '\n')
334			p++;
335
336			*p++ = 0;
337			}
338
339	root	1.8	++linenum;
340	root	1.1	line [klen] = 0;
341	root	1.10	keyword_idx *kw_idx = kw_lex::match (line, klen);
342	root	1.1
343	root	1.10	kw_str = line;
344	root	1.1	line = p;
345
346	root	1.10	if (kw_idx)
347			{
348			kw = kw_idx->index;
349			break;
350			}
351			else if (!kw_str \|\| kw_str == '#')
352	root	1.1	; // empty/comment line
353			else
354	root	1.10	{
355			kw = KW_ERROR;
356			break;
357			}
358	root	1.1	}
359			}
360
361	root	1.4	void
362	root	1.11	object_thawer::skip ()
363	root	1.1	{
364			shstr ml;
365
366			switch (kw)
367			{
368			case KW_msg: get_ml (KW_endmsg , ml); break;
369			case KW_lore: get_ml (KW_endlore , ml); break;
370			case KW_maplore: get_ml (KW_endmaplore, ml); break;
371	pippijn	1.14	default: break;
372	root	1.1	}
373	root	1.10
374	root	1.11	next ();
375	root	1.1	}
376
377	root	1.4	void
378			object_thawer::get_ml (keyword kend, shstr &sh)
379	root	1.1	{
380			char kw[128];
381
382			int klen = keyword_len [kend];
383
384			kw [0] = '\n';
385			memcpy (kw + 1, keyword_str [kend], klen);
386			kw [klen + 1] = '\n';
387			kw [klen + 2] = 0;
388
389	root	1.8	++linenum;
390
391	root	1.1	// first test for completely empty msg... "endXXX\n"
392			if (!strncmp (line, kw + 1, klen + 1))
393			{
394			sh = 0;
395
396			line += klen + 1;
397
398			return;
399			}
400			else
401			{
402			// multi-line strings are delimited by "\nendXXX\n" or "endXXX\n" (NULL)
403
404			char *end = strstr (line, kw);
405
406			if (!end)
407			{
408			sh = 0;
409			return;
410			}
411
412			*end = 0;
413			sh = line;
414
415	root	1.8	// count line numbers
416			while (line < end)
417			linenum += *line++ == '\n';
418
419			line += keyword_len [kend];
420	root	1.1
421			while (*line++ != '\n')
422			;
423	root	1.8
424			++linenum;
425	root	1.1	}
426			}
427
428	root	1.4	sint32
429			object_thawer::get_sint32 () const
430	root	1.1	{
431	root	1.19	char *p = value_nn;
432	root	1.1
433			sint32 val = 0;
434			bool negate;
435
436			if (*p == '-')
437			{
438			negate = true;
439			++p;
440			}
441			else
442			negate = false;
443
444			do
445			{
446			val *= 10;
447			val += *p++ - '0';
448			}
449			while (*p);
450
451			return negate ? -val : val;
452			}
453