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ex_temp.c
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ex_temp.c
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/*
* This code contains changes by
* Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved.
*
* Conditions 1, 2, and 4 and the no-warranty notice below apply
* to these changes.
*
*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* Redistributions of source code and documentation must retain the
* above copyright notice, this list of conditions and the following
* disclaimer.
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed or owned by Caldera
* International, Inc.
* Neither the name of Caldera International, Inc. nor the names of
* other contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
* INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
* LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
#ifdef DOSCCS
static char sccsid[] = "@(#)ex_temp.c 1.24 (gritter) 11/24/04";
#endif
#endif
/* from ex_temp.c 7.5.1.1 (Berkeley) 8/12/86 */
#include "ex.h"
#include "ex_temp.h"
#include "ex_vis.h"
#include "ex_tty.h"
#include <sys/wait.h>
#include <time.h>
/*
* Editor temporary file routines.
* Very similar to those of ed, except uses 2 input buffers.
*/
#define READ 0
#define WRITE 1
/*
* Maximum number of attempts to create temporary file.
*/
#define ATTEMPTS 20
char *tfname;
char *rfname;
int havetmp;
int tfile = -1;
int rfile = -1;
void
fileinit(void)
{
register char *p;
struct stat stbuf;
register int i, j;
pid_t mypid = getpid();
char *tfend;
int attempts = 0;
CLOBBGRD(attempts);
if (tline == INCRMT * (HBLKS+2))
return;
cleanup(0);
if (tfile != -1)
close(tfile);
tline = INCRMT * (HBLKS+2);
blocks[0] = HBLKS;
blocks[1] = HBLKS+1;
blocks[2] = -1;
dirtcnt = 0;
iblock = -1;
iblock2 = -1;
oblock = -1;
tfname = realloc(tfname, strlen(svalue(DIRECTORY)) + 14);
CP(tfname, svalue(DIRECTORY));
if (stat(tfname, &stbuf)) {
dumbness:
if (setexit() == 0)
filioerr(tfname);
else
putNFL();
cleanup(1);
exitex(1);
}
if ((stbuf.st_mode & S_IFMT) != S_IFDIR) {
errno = ENOTDIR;
goto dumbness;
}
ichanged = 0;
ichang2 = 0;
#ifdef notdef /* GR */
ignore(strcat(tfname, "/ExXXXXX"));
for (p = strend(tfname), i = 5, j = getpid(); i > 0; i--, j /= 10)
*--p = j % 10 | '0';
tfile = creat(tfname, 0600);
#else
ignore(strcat(tfname, "/ExXXXXXXXXXX"));
tfend = strend(tfname);
do {
for (p = tfend, i = 10, j = mypid + attempts;
i > 0; i--, j /= 10)
*--p = j % 10 | '0';
tfile = open(tfname, O_CREAT|O_EXCL|O_RDWR
#ifdef O_
|O_
#endif /* O_ */
, 0600);
} while (tfile < 0 && attempts++ < ATTEMPTS);
#endif /* !notdef */
if (tfile < 0)
goto dumbness;
#ifdef INCORB
{
extern bloc stilinc; /* see below */
stilinc = 0;
}
#endif
havetmp = 1;
/* brk((char *)fendcore); */
}
void
cleanup(bool all)
{
if (all) {
putpad(TE);
flush();
}
if (havetmp)
unlink(tfname);
havetmp = 0;
if (all && rfile >= 0) {
unlink(rfname);
close(rfile);
rfile = -1;
}
}
void
getline(line tl)
{
register char *bp, *lp;
register bbloc nl;
lp = linebuf;
bp = getblock(tl, READ);
nl = nleft;
tl &= ~OFFMSK;
while (*lp++ = *bp++)
if (--nl == 0) {
bp = getblock(tl += INCRMT, READ);
nl = nleft;
}
}
line
putline(void)
{
register char *bp, *lp;
register bbloc nl;
line tl;
dirtcnt++;
lp = linebuf;
change();
tl = tline;
bp = getblock(tl, WRITE);
nl = nleft;
tl &= ~OFFMSK;
while (*bp = *lp++) {
if (*bp++ == '\n') {
*--bp = 0;
linebp = lp;
break;
}
if (--nl == 0) {
bp = getblock(tl += INCRMT, WRITE);
nl = nleft;
}
}
tl = tline;
tline += (((lp - linebuf) + BNDRY - 1) >> SHFT) & 077776;
return (tl);
}
char *
getblock(line atl, int iof)
{
register bbloc bno, off;
bno = (atl >> OFFBTS) & BLKMSK;
off = (atl << SHFT) & LBTMSK;
if (bno >= NMBLKS)
error(catgets(catd, 1, 183, " Tmp file too large"));
nleft = BUFSIZ - off;
if (bno == iblock) {
ichanged |= iof;
hitin2 = 0;
return (ibuff + off);
}
if (bno == iblock2) {
ichang2 |= iof;
hitin2 = 1;
return (ibuff2 + off);
}
if (bno == oblock)
return (obuff + off);
if (iof == READ) {
if (hitin2 == 0) {
if (ichang2) {
blkio(iblock2, ibuff2, (ssize_t(*)())write);
}
ichang2 = 0;
iblock2 = bno;
blkio(bno, ibuff2, (ssize_t(*)())read);
hitin2 = 1;
return (ibuff2 + off);
}
hitin2 = 0;
if (ichanged) {
blkio(iblock, ibuff, (ssize_t(*)())write);
}
ichanged = 0;
iblock = bno;
blkio(bno, ibuff, (ssize_t(*)())read);
return (ibuff + off);
}
if (oblock >= 0) {
blkio(oblock, obuff, (ssize_t(*)())write);
}
oblock = bno;
return (obuff + off);
}
#ifdef INCORB
char incorb[INCORB+1][BUFSIZ];
#define pagrnd(a) ((char *)(((size_t)a)&~(BUFSIZ-1)))
bloc stilinc; /* up to here not written yet */
#endif
void
blkio(bloc b, char *buf, ssize_t (*iofcn)(int, void *, size_t))
{
#ifdef INCORB
if (b < INCORB) {
if (iofcn == (ssize_t(*)())read) {
copy(buf, pagrnd(incorb[b+1]), (size_t) BUFSIZ);
return;
}
copy(pagrnd(incorb[b+1]), buf, (size_t) BUFSIZ);
if (laste) {
if (b >= stilinc)
stilinc = b + 1;
return;
}
} else if (stilinc)
tflush();
#endif
lseek(tfile, (off_t) ((b & BLKMSK) * BUFSIZ), SEEK_SET);
if ((*iofcn)(tfile, buf, BUFSIZ) != BUFSIZ)
filioerr(tfname);
}
#ifdef INCORB
void
tlaste(void)
{
if (stilinc)
dirtcnt = 0;
}
void
tflush(void)
{
bbloc i = stilinc;
stilinc = 0;
lseek(tfile, (off_t) 0, SEEK_SET);
if (write(tfile, pagrnd(incorb[1]), i * BUFSIZ) != (i * BUFSIZ))
filioerr(tfname);
}
#endif
/*
* Synchronize the state of the temporary file in case
* a crash occurs.
*/
void
synctmp(void)
{
register bbloc cnt;
register line *a;
register bloc *bp, *up;
#ifdef INCORB
if (stilinc)
return;
#endif
if (dol == zero)
return;
if (ichanged)
blkio(iblock, ibuff, (ssize_t(*)())write);
ichanged = 0;
if (ichang2)
blkio(iblock2, ibuff2, (ssize_t(*)())write);
ichang2 = 0;
if (oblock != -1)
blkio(oblock, obuff, (ssize_t(*)())write);
time(&H.Time);
uid = getuid();
*zero = (line) H.Time;
up = blocks + LBLKS;
for (a = zero, bp = blocks; a <= dol; a += BUFSIZ / sizeof *a, bp++) {
if (bp >= up)
error(catgets(catd, 1, 184, " Tmp file too large"));
if (*bp < 0) {
tline = (tline + OFFMSK) &~ OFFMSK;
*bp = ((tline >> OFFBTS) & BLKMSK);
if (*bp > NMBLKS)
error(catgets(catd, 1, 185,
" Tmp file too large"));
tline += INCRMT;
oblock = *bp + 1;
bp[1] = -1;
}
lseek(tfile, (off_t) ((*bp & BLKMSK) * BUFSIZ), SEEK_SET);
cnt = ((dol - a) + 2) * sizeof (line);
if (cnt > BUFSIZ)
cnt = BUFSIZ;
if (write(tfile, (char *) a, cnt) != cnt) {
oops:
*zero = 0;
filioerr(tfname);
}
*zero = 0;
}
flines = lineDOL();
lseek(tfile, (off_t) 0, SEEK_SET);
if (write(tfile, (char *) &H, sizeof H) != sizeof H)
goto oops;
#ifdef notdef
/*
* This will insure that exrecover gets as much
* back after a crash as is absolutely possible,
* but can result in pregnant pauses between commands
* when the TSYNC call is made, so...
*/
fsync(tfile);
#endif
}
void
TSYNC(void)
{
if (dirtcnt > MAXDIRT) { /* mjm: 12 --> MAXDIRT */
#ifdef INCORB
if (stilinc)
tflush();
#endif
dirtcnt = 0;
synctmp();
}
}
/*
* Named buffer routines.
* These are implemented differently than the main buffer.
* Each named buffer has a chain of blocks in the register file.
* Each block contains roughly 508 chars of text,
* and a previous and next block number. We also have information
* about which blocks came from deletes of multiple partial lines,
* e.g. deleting a sentence or a LISP object.
*
* We maintain a free map for the temp file. To free the blocks
* in a register we must read the blocks to find how they are chained
* together.
*
* BUG: The default savind of deleted lines in numbered
* buffers may be rather inefficient; it hasn't been profiled.
*/
struct strreg {
short rg_flags;
short rg_nleft;
short rg_first;
short rg_last;
} strregs[('z'-'a'+1) + ('9'-'0'+1)], *strp;
struct rbuf {
short rb_prev;
short rb_next;
char rb_text[BUFSIZ - 2 * sizeof (short)];
} *rbuf, KILLrbuf, putrbuf, YANKrbuf, regrbuf;
#ifdef VMUNIX
#ifdef LARGEF
short rused[4096];
#else /* !LARGEF */
short rused[256];
#endif /* !LARGEF */
#else /* !VMUNIX */
short rused[32];
#endif /* !VMUNIX */
short rnleft;
short rblock;
short rnext;
char *rbufcp;
void
regio(short b, ssize_t (*iofcn)(int, void *, size_t))
{
register char *p;
char *rfend;
int attempts = 0;
register int i, j;
pid_t mypid = getpid();
if (rfile == -1) {
rfname = realloc(rfname, strlen(svalue(DIRECTORY)) + 14);
CP(rfname, tfname);
rfend = strend(rfname);
#ifdef notdef /* GR */
*(rfend - 7) = 'R';
#else
*(rfend - 12) = 'R';
#endif
do {
for (p = rfend, i = 10, j = mypid + attempts;
i > 0; i--, j /= 10)
*--p = j % 10 | '0';
rfile = open(rfname, O_CREAT|O_EXCL|O_RDWR
#ifdef O_
|O_
#endif /* O_ */
, 0600);
} while (rfile < 0 && attempts++ < ATTEMPTS);
if (rfile < 0)
oops:
filioerr(rfname);
}
lseek(rfile, (off_t) ((b & BLKMSK) * BUFSIZ), SEEK_SET);
if ((*iofcn)(rfile, rbuf, BUFSIZ) != BUFSIZ)
goto oops;
rblock = b;
}
int
REGblk(void)
{
register int i, j, m;
for (i = 0; i < sizeof rused / sizeof rused[0]; i++) {
m = (rused[i] ^ 0177777) & 0177777;
if (i == 0)
m &= ~1;
if (m != 0) {
j = 0;
while ((m & 1) == 0)
j++, m >>= 1;
rused[i] |= (1 << j);
#ifdef RDEBUG
printf("allocating block %d\n", i * 16 + j);
#endif
return (i * 16 + j);
}
}
error(catgets(catd, 1, 186, "Out of register space (ugh)"));
/*NOTREACHED*/
return 0;
}
struct strreg *
mapreg(register int c)
{
if (isupper(c))
c = tolower(c);
return (isdigit(c) ? &strregs[('z'-'a'+1)+(c-'0')] : &strregs[c-'a']);
}
void
KILLreg(register int c)
{
register struct strreg *sp;
rbuf = &KILLrbuf;
sp = mapreg(c);
rblock = sp->rg_first;
sp->rg_first = sp->rg_last = 0;
sp->rg_flags = sp->rg_nleft = 0;
while (rblock != 0) {
#ifdef RDEBUG
printf("freeing block %d\n", rblock);
#endif
rused[rblock / 16] &= ~(1 << (rblock % 16));
regio(rblock, (ssize_t (*)(int, void *, size_t))shread);
rblock = rbuf->rb_next;
}
}
ssize_t
shread(void)
{
struct front { short a; short b; };
if (read(rfile, (char *) rbuf, sizeof (struct front)) == sizeof (struct front))
return (sizeof (struct rbuf));
return (0);
}
int getREG();
void
putreg(int c)
{
register line *odot = dot;
register line *odol = dol;
register int cnt;
deletenone();
appendnone();
rbuf = &putrbuf;
rnleft = 0;
rblock = 0;
rnext = mapreg(c)->rg_first;
if (rnext == 0) {
if (inopen) {
splitw++;
vclean();
vgoto(WECHO, 0);
}
vreg = -1;
error(catgets(catd, 1, 187, "Nothing in register %c"), c);
}
if (inopen && partreg(c)) {
if (!FIXUNDO) {
splitw++; vclean(); vgoto(WECHO, 0); vreg = -1;
error(catgets(catd, 1, 188,
"Can't put partial line inside macro"));
}
squish();
addr1 = addr2 = dol;
}
cnt = append(getREG, addr2);
if (inopen && partreg(c)) {
unddol = dol;
dol = odol;
dot = odot;
pragged(0);
}
killcnt(cnt);
notecnt = cnt;
}
int
partreg(int c)
{
return (mapreg(c)->rg_flags);
}
void
notpart(register int c)
{
if (c)
mapreg(c)->rg_flags = 0;
}
int
getREG(void)
{
register char *lp = linebuf;
register int c;
for (;;) {
if (rnleft == 0) {
if (rnext == 0)
return (EOF);
regio(rnext, read);
rnext = rbuf->rb_next;
rbufcp = rbuf->rb_text;
rnleft = sizeof rbuf->rb_text;
}
c = *rbufcp;
if (c == 0)
return (EOF);
rbufcp++, --rnleft;
if (c == '\n') {
*lp++ = 0;
return (0);
}
*lp++ = c;
}
}
void
YANKreg(register int c)
{
register line *addr;
register struct strreg *sp;
char savelb[LBSIZE];
if (isdigit(c))
kshift();
if (islower(c))
KILLreg(c);
strp = sp = mapreg(c);
sp->rg_flags = inopen && cursor && wcursor;
rbuf = &YANKrbuf;
if (sp->rg_last) {
regio(sp->rg_last, read);
rnleft = sp->rg_nleft;
rbufcp = &rbuf->rb_text[sizeof rbuf->rb_text - rnleft];
} else {
rblock = 0;
rnleft = 0;
}
CP(savelb,linebuf);
for (addr = addr1; addr <= addr2; addr++) {
getline(*addr);
if (sp->rg_flags) {
if (addr == addr2)
*wcursor = 0;
if (addr == addr1)
strcpy(linebuf, cursor);
}
YANKline();
}
rbflush();
killed();
CP(linebuf,savelb);
}
void
kshift(void)
{
register int i;
KILLreg('9');
for (i = '8'; i >= '0'; i--)
copy(mapreg(i+1), mapreg(i), sizeof (struct strreg));
}
void
YANKline(void)
{
register char *lp = linebuf;
register struct rbuf *rp = rbuf;
register int c;
do {
c = *lp++;
if (c == 0)
c = '\n';
if (rnleft == 0) {
rp->rb_next = REGblk();
rbflush();
rblock = rp->rb_next;
rp->rb_next = 0;
rp->rb_prev = rblock;
rnleft = sizeof rp->rb_text;
rbufcp = rp->rb_text;
}
*rbufcp++ = c;
--rnleft;
} while (c != '\n');
if (rnleft)
*rbufcp = 0;
}
void
rbflush(void)
{
register struct strreg *sp = strp;
if (rblock == 0)
return;
regio(rblock, (ssize_t (*)(int, void *, size_t))write);
if (sp->rg_first == 0)
sp->rg_first = rblock;
sp->rg_last = rblock;
sp->rg_nleft = rnleft;
}
/* Register c to char buffer buf of size buflen */
void
regbuf(char c, char *buf, int buflen)
{
register char *p, *lp;
rbuf = ®rbuf;
rnleft = 0;
rblock = 0;
rnext = mapreg(c)->rg_first;
if (rnext==0) {
*buf = 0;
error(catgets(catd, 1, 189, "Nothing in register %c"),c);
}
p = buf;
while (getREG()==0) {
for (lp=linebuf; *lp;) {
if (p >= &buf[buflen])
error(catgets(catd, 1, 190,
"Register too long@to fit in memory"));
*p++ = *lp++;
}
*p++ = '\n';
}
if (partreg(c)) p--;
*p = '\0';
getDOT();
}