Convert-UUlib/uulib/uuutil.c

/*
 * This file is part of uudeview, the simple and friendly multi-part multi-
 * file uudecoder  program  (c) 1994-2001 by Frank Pilhofer. The author may
 * be contacted at fp@fpx.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.
 */

/*
 * certain utilitarian functions that didn't fit anywhere else
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef SYSTEM_WINDLL
#include <windows.h>
#endif
#ifdef SYSTEM_OS2
#include <os2.h>
#endif

#include <stdio.h>
#include <ctype.h>

#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif

#include <uudeview.h>
#include <uuint.h>
#include <fptools.h>
#include <uustring.h>

char * uuutil_id = "$Id: uuutil.c,v 1.15 2001/06/06 18:21:47 fp Exp $";

/*
 * Parts with different known extensions will not be merged by SPMS.
 * if first character is '@', it is synonymous to the previous one.
 */

static char *knownexts[] = {
  "mpg", "@mpeg", "avi", "mov",
  "gif", "jpg", "@jpeg", "tif",
  "voc", "wav", "@wave", "au",
  "zip", "arj", "tar",
  NULL
};

/*
 * forward declarations of local functions
 */

static int      UUSMPKnownExt           _ANSI_ARGS_((char *filename));
static uulist * UU_smparts_r            _ANSI_ARGS_((uulist *, int));

/*
 * mallocable areas
 */

char *uuutil_bhwtmp;

/*
 * free some memory
 **/

void
UUkillfread (fileread *data)
{
  if (data != NULL) {
    _FP_free (data->subject);
    _FP_free (data->filename);
    _FP_free (data->origin);
    _FP_free (data->mimeid);
    _FP_free (data->mimetype);
    _FP_free (data->sfname);
    _FP_free (data);
  }
}

void
UUkillfile (uufile *data)
{
  uufile *next;

  while (data) {
    _FP_free    (data->filename);
    _FP_free    (data->subfname);
    _FP_free    (data->mimeid);
    _FP_free    (data->mimetype);
    UUkillfread (data->data);

    next = data->NEXT;
    _FP_free  (data);
    data = next;
  }
}

void
UUkilllist (uulist *data)
{
  uulist *next;

  while (data) {
    if (data->binfile != NULL)
      if (unlink (data->binfile))
        UUMessage (uuutil_id, __LINE__, UUMSG_WARNING,
                   uustring (S_TMP_NOT_REMOVED),
                   data->binfile, strerror (errno));

    _FP_free   (data->filename);
    _FP_free   (data->subfname);
    _FP_free   (data->mimeid);
    _FP_free   (data->mimetype);
    _FP_free   (data->binfile);
    UUkillfile (data->thisfile);
    _FP_free   (data->haveparts);
    _FP_free   (data->misparts);

    next = data->NEXT;
    _FP_free (data);
    data = next;
  }
}

/*
 * this kill function is an exception in that it doesn't kill data itself
 */

void
UUkillheaders (headers *data)
{
  if (data != NULL) {
    _FP_free (data->from);
    _FP_free (data->subject);
    _FP_free (data->rcpt);
    _FP_free (data->date);
    _FP_free (data->mimevers);
    _FP_free (data->ctype);
    _FP_free (data->ctenc);
    _FP_free (data->fname);
    _FP_free (data->boundary);
    _FP_free (data->mimeid);
    memset   (data, 0, sizeof (headers));
  }
}

/*
 * checks for various well-known extensions. if two parts have different
 * known extensions, we won't merge them.
 */

static int
UUSMPKnownExt (char *filename)
{
  char **eiter = knownexts, *ptr=_FP_strrchr(filename, '.');
  int count=0, where=0;

  if (ptr == NULL)
    return -1;
  ptr++;

  while (*eiter) {
    if (_FP_stricmp (ptr, (**eiter=='@')?*eiter+1:*eiter) == 0)
      return where;
    else
      eiter++;

    if (*eiter == NULL)
      break;

    if (**eiter=='@')
      count++;
    else
      where = ++count;
  }
  return -1;
}

/*
 * de-compress a binhex RLE stream
 * the data read from in is uncompressed, and at most maxcount bytes
 * (or octets, as they say) are copied to out. Because an uncompression
 * might not be completed because of this maximum number of bytes. There-
 * for, the leftover character and repetition count is saved. If a marker
 * has been read but not the repetition count, *rpc is set to -256.
 *
 * the function returns the number of bytes eaten from in. If opc is not
 * NULL, the total number of characters stored in out is saved there
 *
 * with repetition counts, remember that we've already transferred *one*
 * occurence
 */

int
UUbhdecomp (char *in, char *out, char *last, int *rpc, 
            size_t inc, size_t max, size_t *opc)
{
  size_t count, used=0, dummy;
  char marker = '\220' /* '\x90' */;

  if (opc == NULL)
    opc = &dummy;
  else
    *opc = 0;

  if (*rpc == -256) {
    if (inc == 0)
      return 0;
    *rpc = (int) (unsigned char) *in++; used++;

    if (*rpc == 0) {
      *last = *out++ = marker;
      max--; *opc+=1;
    }
    else
      *rpc-=1;
  }

  if (*rpc) {
    count = (max > (size_t) *rpc) ? (size_t) *rpc : max;

    memset (out, *last, count);

    out  += count;
    *opc += count;
    max  -= count;
    *rpc -= count;
  }

  while (used < inc && max) {
    if (*in == marker) {
      used++; in++;
      if (used == inc) {
        *rpc = -256;
        return used;
      }
      *rpc = (int) (unsigned char) *in++; used++;

      if (*rpc == 0) {
        *last = *out++ = marker;
        max--; *opc+=1;
        continue;
      }
      else
        *rpc -= 1;

      count = (max > (size_t) *rpc) ? (size_t) *rpc : max;
      memset (out, *last, count);

      out  += count;
      *opc += count;
      max  -= count;
      *rpc -= count;
    }
    else {
      *last = *out++ = *in++;
      used++; *opc+=1; max--;
    }
  }

  return used;
}

/*
 * write to binhex file
 */

size_t
UUbhwrite (char *ptr, size_t sel, size_t nel, FILE *file)
{
  char *tmpstring=uuutil_bhwtmp;
  static int rpc = 0;
  static char lc;
  int count, tc=0;
  size_t opc;

  if (ptr == NULL) { /* init */
    rpc = 0;
    return 0;
  }

  while (nel || (rpc != 0 && rpc != -256)) {
    count = UUbhdecomp (ptr, tmpstring, &lc, &rpc,
                        nel, 256, &opc);
    if (fwrite (tmpstring, 1, opc, file) != opc)
      return 0;
    if (ferror (file))
      return 0;
    nel -= count;
    ptr += count;
    tc  += count;
  }

  return tc;
}

static uulist *
UU_smparts_r (uulist *addit, int pass)
{
  uulist *iter = UUGlobalFileList;
  uufile *fiter, *dest, *temp;
  int count, flag, a, b;

  while (iter) {
    if ((iter->state & UUFILE_OK) || iter->uudet == 0) {
      iter = iter->NEXT;
      continue;
    }
    if (iter == addit) {
      iter = iter->NEXT;
      continue;
    }
    if ((iter->begin && addit->begin) || (iter->end && addit->end) ||
        (iter->uudet != addit->uudet)) {
      iter = iter->NEXT;
      continue;
    }
    if ((a = UUSMPKnownExt (addit->subfname)) != -1 &&
        (b = UUSMPKnownExt (iter->subfname))  != -1)
      if (a != b) {
        iter = iter->NEXT;
        continue;
      }

    flag  = count = 0;
    fiter = iter->thisfile;
    temp  = addit->thisfile;
    dest  = NULL;

    while (temp) {
      if (!(temp->data->uudet)) {
        temp = temp->NEXT;
        continue;
      }

      while (fiter && fiter->partno < temp->partno) {
        dest  = fiter;
        fiter = fiter->NEXT;
      }
      if (fiter && fiter->partno == temp->partno) {
        flag = 0;
        break;
      }
      else {
        flag   = 1;
        count += ((dest)  ? temp->partno - dest->partno - 1 : 0) +
                 ((fiter) ? fiter->partno - temp->partno - 1 : 0);
      }

      temp = temp->NEXT;
    }
    if (flag == 0 ||
        (pass == 0 && count > 0) ||
        (pass == 1 && count > 5)) {
      iter = iter->NEXT;
      continue;
    }

    dest  = iter->thisfile;
    fiter = addit->thisfile;

    if (iter->filename == NULL && addit->filename != NULL)
      iter->filename = _FP_strdup (addit->filename);

    if (addit->begin) iter->begin = 1;
    if (addit->end)   iter->end   = 1;

    if (addit->mode != 0 && iter->mode == 0)
      iter->mode = addit->mode;

    while (fiter) {
      flag = 0;

      if (fiter->partno == iter->thisfile->partno ||
          (dest->NEXT != NULL && fiter->partno == dest->NEXT->partno)) {
        temp           = fiter->NEXT;
        fiter->NEXT    = NULL;

        UUkillfile (fiter);

        addit->thisfile= temp;
        fiter          = temp;
        continue;
      }
      if (fiter->partno < iter->thisfile->partno) {
        temp           = fiter->NEXT;
        fiter->NEXT    = iter->thisfile;
        iter->thisfile = fiter;
        dest           = fiter;
        addit->thisfile= temp;
        fiter          = temp;
      }
      else if (dest->NEXT == NULL || fiter->partno < dest->NEXT->partno) {
        temp           = fiter->NEXT;
        fiter->NEXT    = dest->NEXT;
        dest->NEXT     = fiter;
        addit->thisfile= temp;
        fiter          = temp;
      }
      else {
        dest = dest->NEXT;
      }
    }
    break;
  }
  return iter;
}

int UUEXPORT
UUSmerge (int pass)
{
  uulist *iter = UUGlobalFileList, *last=NULL, *res, *temp;
  int flag = 0;

  while (iter) {
    if ((iter->state & UUFILE_OK) || iter->uudet == 0) {
      last = iter;
      iter = iter->NEXT;
      continue;
    }
    if ((res = UU_smparts_r (iter, pass)) != NULL) {
      UUMessage (uuutil_id, __LINE__, UUMSG_MESSAGE,
                 uustring (S_SMERGE_MERGED),
                 (iter->subfname) ? iter->subfname : "",
                 (res->subfname)  ? res->subfname  : "", pass);
 
      temp       = iter->NEXT;
      iter->NEXT = NULL;
      UUkilllist (iter);

      flag++;

      if (last == NULL) {
        UUGlobalFileList = temp;
        iter             = temp;
      }
      else {
        last->NEXT       = temp;
        iter             = temp;
      }

      continue;
    }
    last = iter;
    iter = iter->NEXT;
  }

  /*
   * check again
   */

  UUCheckGlobalList ();

  return flag;
}

Revision:	1.2.2.5
Committed:	Sun Apr 18 19:55:46 2004 UTC (20 years, 1 month ago) by root
Content type:	text/plain
Branch:	UUDEVIEW
CVS Tags:	UUDEVIEW-0-5-20
Changes since 1.2.2.4:	+0 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* This file is part of uudeview, the simple and friendly multi-part multi-
3	* file uudecoder program (c) 1994-2001 by Frank Pilhofer. The author may
4	* be contacted at fp@fpx.de
5	*
6	* This program 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 2 of the License, or
9	* (at your 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
17	/*
18	* certain utilitarian functions that didn't fit anywhere else
19	*/
20
21	#ifdef HAVE_CONFIG_H
22	#include "config.h"
23	#endif
24
25	#ifdef SYSTEM_WINDLL
26	#include <windows.h>
27	#endif
28	#ifdef SYSTEM_OS2
29	#include <os2.h>
30	#endif
31
32	#include <stdio.h>
33	#include <ctype.h>
34
35	#ifdef STDC_HEADERS
36	#include <stdlib.h>
37	#include <string.h>
38	#endif
39	#ifdef HAVE_MALLOC_H
40	#include <malloc.h>
41	#endif
42	#ifdef HAVE_UNISTD_H
43	#include <unistd.h>
44	#endif
45	#ifdef HAVE_MEMORY_H
46	#include <memory.h>
47	#endif
48	#ifdef HAVE_ERRNO_H
49	#include <errno.h>
50	#endif
51
52	#include <uudeview.h>
53	#include <uuint.h>
54	#include <fptools.h>
55	#include <uustring.h>
56
57	char * uuutil_id = "$Id: uuutil.c,v 1.15 2001/06/06 18:21:47 fp Exp $";
58
59	/*
60	* Parts with different known extensions will not be merged by SPMS.
61	* if first character is '@', it is synonymous to the previous one.
62	*/
63
64	static char *knownexts[] = {
65	"mpg", "@mpeg", "avi", "mov",
66	"gif", "jpg", "@jpeg", "tif",
67	"voc", "wav", "@wave", "au",
68	"zip", "arj", "tar",
69	NULL
70	};
71
72	/*
73	* forward declarations of local functions
74	*/
75
76	static int UUSMPKnownExt _ANSI_ARGS_((char *filename));
77	static uulist * UU_smparts_r _ANSI_ARGS_((uulist *, int));
78
79	/*
80	* mallocable areas
81	*/
82
83	char *uuutil_bhwtmp;
84
85	/*
86	* free some memory
87	**/
88
89	void
90	UUkillfread (fileread *data)
91	{
92	if (data != NULL) {
93	_FP_free (data->subject);
94	_FP_free (data->filename);
95	_FP_free (data->origin);
96	_FP_free (data->mimeid);
97	_FP_free (data->mimetype);
98	_FP_free (data->sfname);
99	_FP_free (data);
100	}
101	}
102
103	void
104	UUkillfile (uufile *data)
105	{
106	uufile *next;
107
108	while (data) {
109	_FP_free (data->filename);
110	_FP_free (data->subfname);
111	_FP_free (data->mimeid);
112	_FP_free (data->mimetype);
113	UUkillfread (data->data);
114
115	next = data->NEXT;
116	_FP_free (data);
117	data = next;
118	}
119	}
120
121	void
122	UUkilllist (uulist *data)
123	{
124	uulist *next;
125
126	while (data) {
127	if (data->binfile != NULL)
128	if (unlink (data->binfile))
129	UUMessage (uuutil_id, __LINE__, UUMSG_WARNING,
130	uustring (S_TMP_NOT_REMOVED),
131	data->binfile, strerror (errno));
132
133	_FP_free (data->filename);
134	_FP_free (data->subfname);
135	_FP_free (data->mimeid);
136	_FP_free (data->mimetype);
137	_FP_free (data->binfile);
138	UUkillfile (data->thisfile);
139	_FP_free (data->haveparts);
140	_FP_free (data->misparts);
141
142	next = data->NEXT;
143	_FP_free (data);
144	data = next;
145	}
146	}
147
148	/*
149	* this kill function is an exception in that it doesn't kill data itself
150	*/
151
152	void
153	UUkillheaders (headers *data)
154	{
155	if (data != NULL) {
156	_FP_free (data->from);
157	_FP_free (data->subject);
158	_FP_free (data->rcpt);
159	_FP_free (data->date);
160	_FP_free (data->mimevers);
161	_FP_free (data->ctype);
162	_FP_free (data->ctenc);
163	_FP_free (data->fname);
164	_FP_free (data->boundary);
165	_FP_free (data->mimeid);
166	memset (data, 0, sizeof (headers));
167	}
168	}
169
170	/*
171	* checks for various well-known extensions. if two parts have different
172	* known extensions, we won't merge them.
173	*/
174
175	static int
176	UUSMPKnownExt (char *filename)
177	{
178	char *eiter = knownexts, ptr=_FP_strrchr(filename, '.');
179	int count=0, where=0;
180
181	if (ptr == NULL)
182	return -1;
183	ptr++;
184
185	while (*eiter) {
186	if (_FP_stricmp (ptr, (*eiter=='@')?eiter+1:*eiter) == 0)
187	return where;
188	else
189	eiter++;
190
191	if (*eiter == NULL)
192	break;
193
194	if (**eiter=='@')
195	count++;
196	else
197	where = ++count;
198	}
199	return -1;
200	}
201
202	/*
203	* de-compress a binhex RLE stream
204	* the data read from in is uncompressed, and at most maxcount bytes
205	* (or octets, as they say) are copied to out. Because an uncompression
206	* might not be completed because of this maximum number of bytes. There-
207	* for, the leftover character and repetition count is saved. If a marker
208	* has been read but not the repetition count, *rpc is set to -256.
209	*
210	* the function returns the number of bytes eaten from in. If opc is not
211	* NULL, the total number of characters stored in out is saved there
212	*
213	* with repetition counts, remember that we've already transferred one
214	* occurence
215	*/
216
217	int
218	UUbhdecomp (char in, char out, char last, int rpc,
219	size_t inc, size_t max, size_t *opc)
220	{
221	size_t count, used=0, dummy;
222	char marker = '\220' /* '\x90' */;
223
224	if (opc == NULL)
225	opc = &dummy;
226	else
227	*opc = 0;
228
229	if (*rpc == -256) {
230	if (inc == 0)
231	return 0;
232	rpc = (int) (unsigned char) in++; used++;
233
234	if (*rpc == 0) {
235	last = out++ = marker;
236	max--; *opc+=1;
237	}
238	else
239	*rpc-=1;
240	}
241
242	if (*rpc) {
243	count = (max > (size_t) rpc) ? (size_t) rpc : max;
244
245	memset (out, *last, count);
246
247	out += count;
248	*opc += count;
249	max -= count;
250	*rpc -= count;
251	}
252
253	while (used < inc && max) {
254	if (*in == marker) {
255	used++; in++;
256	if (used == inc) {
257	*rpc = -256;
258	return used;
259	}
260	rpc = (int) (unsigned char) in++; used++;
261
262	if (*rpc == 0) {
263	last = out++ = marker;
264	max--; *opc+=1;
265	continue;
266	}
267	else
268	*rpc -= 1;
269
270	count = (max > (size_t) rpc) ? (size_t) rpc : max;
271	memset (out, *last, count);
272
273	out += count;
274	*opc += count;
275	max -= count;
276	*rpc -= count;
277	}
278	else {
279	last = out++ = *in++;
280	used++; *opc+=1; max--;
281	}
282	}
283
284	return used;
285	}
286
287	/*
288	* write to binhex file
289	*/
290
291	size_t
292	UUbhwrite (char ptr, size_t sel, size_t nel, FILE file)
293	{
294	char *tmpstring=uuutil_bhwtmp;
295	static int rpc = 0;
296	static char lc;
297	int count, tc=0;
298	size_t opc;
299
300	if (ptr == NULL) { /* init */
301	rpc = 0;
302	return 0;
303	}
304
305	while (nel \|\| (rpc != 0 && rpc != -256)) {
306	count = UUbhdecomp (ptr, tmpstring, &lc, &rpc,
307	nel, 256, &opc);
308	if (fwrite (tmpstring, 1, opc, file) != opc)
309	return 0;
310	if (ferror (file))
311	return 0;
312	nel -= count;
313	ptr += count;
314	tc += count;
315	}
316
317	return tc;
318	}
319
320	static uulist *
321	UU_smparts_r (uulist *addit, int pass)
322	{
323	uulist *iter = UUGlobalFileList;
324	uufile fiter, dest, *temp;
325	int count, flag, a, b;
326
327	while (iter) {
328	if ((iter->state & UUFILE_OK) \|\| iter->uudet == 0) {
329	iter = iter->NEXT;
330	continue;
331	}
332	if (iter == addit) {
333	iter = iter->NEXT;
334	continue;
335	}
336	if ((iter->begin && addit->begin) \|\| (iter->end && addit->end) \|\|
337	(iter->uudet != addit->uudet)) {
338	iter = iter->NEXT;
339	continue;
340	}
341	if ((a = UUSMPKnownExt (addit->subfname)) != -1 &&
342	(b = UUSMPKnownExt (iter->subfname)) != -1)
343	if (a != b) {
344	iter = iter->NEXT;
345	continue;
346	}
347
348	flag = count = 0;
349	fiter = iter->thisfile;
350	temp = addit->thisfile;
351	dest = NULL;
352
353	while (temp) {
354	if (!(temp->data->uudet)) {
355	temp = temp->NEXT;
356	continue;
357	}
358
359	while (fiter && fiter->partno < temp->partno) {
360	dest = fiter;
361	fiter = fiter->NEXT;
362	}
363	if (fiter && fiter->partno == temp->partno) {
364	flag = 0;
365	break;
366	}
367	else {
368	flag = 1;
369	count += ((dest) ? temp->partno - dest->partno - 1 : 0) +
370	((fiter) ? fiter->partno - temp->partno - 1 : 0);
371	}
372
373	temp = temp->NEXT;
374	}
375	if (flag == 0 \|\|
376	(pass == 0 && count > 0) \|\|
377	(pass == 1 && count > 5)) {
378	iter = iter->NEXT;
379	continue;
380	}
381
382	dest = iter->thisfile;
383	fiter = addit->thisfile;
384
385	if (iter->filename == NULL && addit->filename != NULL)
386	iter->filename = _FP_strdup (addit->filename);
387
388	if (addit->begin) iter->begin = 1;
389	if (addit->end) iter->end = 1;
390
391	if (addit->mode != 0 && iter->mode == 0)
392	iter->mode = addit->mode;
393
394	while (fiter) {
395	flag = 0;
396
397	if (fiter->partno == iter->thisfile->partno \|\|
398	(dest->NEXT != NULL && fiter->partno == dest->NEXT->partno)) {
399	temp = fiter->NEXT;
400	fiter->NEXT = NULL;
401
402	UUkillfile (fiter);
403
404	addit->thisfile= temp;
405	fiter = temp;
406	continue;
407	}
408	if (fiter->partno < iter->thisfile->partno) {
409	temp = fiter->NEXT;
410	fiter->NEXT = iter->thisfile;
411	iter->thisfile = fiter;
412	dest = fiter;
413	addit->thisfile= temp;
414	fiter = temp;
415	}
416	else if (dest->NEXT == NULL \|\| fiter->partno < dest->NEXT->partno) {
417	temp = fiter->NEXT;
418	fiter->NEXT = dest->NEXT;
419	dest->NEXT = fiter;
420	addit->thisfile= temp;
421	fiter = temp;
422	}
423	else {
424	dest = dest->NEXT;
425	}
426	}
427	break;
428	}
429	return iter;
430	}
431
432	int UUEXPORT
433	UUSmerge (int pass)
434	{
435	uulist iter = UUGlobalFileList, last=NULL, res, temp;
436	int flag = 0;
437
438	while (iter) {
439	if ((iter->state & UUFILE_OK) \|\| iter->uudet == 0) {
440	last = iter;
441	iter = iter->NEXT;
442	continue;
443	}
444	if ((res = UU_smparts_r (iter, pass)) != NULL) {
445	UUMessage (uuutil_id, __LINE__, UUMSG_MESSAGE,
446	uustring (S_SMERGE_MERGED),
447	(iter->subfname) ? iter->subfname : "",
448	(res->subfname) ? res->subfname : "", pass);
449
450	temp = iter->NEXT;
451	iter->NEXT = NULL;
452	UUkilllist (iter);
453
454	flag++;
455
456	if (last == NULL) {
457	UUGlobalFileList = temp;
458	iter = temp;
459	}
460	else {
461	last->NEXT = temp;
462	iter = temp;
463	}
464
465	continue;
466	}
467	last = iter;
468	iter = iter->NEXT;
469	}
470
471	/*
472	* check again
473	*/
474
475	UUCheckGlobalList ();
476
477	return flag;
478	}
479