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deb-goldedplus/goldlib/uulib/uuutil.c

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2000-02-25 10:15:17 +00:00
/*
* This file is part of uudeview, the simple and friendly multi-part multi-
* file uudecoder program (c) 1994 by Frank Pilhofer. The author may be
* contacted by his email address, fp@informatik.uni-frankfurt.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 = "$Id$";
/*
* 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;
}
/*****************************************************************************
+ Frank Pilhofer fp@informatik.uni-frankfurt.de +
+---------------------------------------------------------------------------+
| Department of Computer Sciences * University of Frankfurt / Main, Germany |
*****************************************************************************/