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tio.c
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1993-03-19
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/* tio.c */
/* Author:
* Steve Kirkendall
* 14407 SW Teal Blvd. #C
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
/* This file contains terminal I/O functions */
#include "config.h"
#include "vi.h"
#include "ctype.h"
static int showmsg P_((void));
/* This function reads in a line from the terminal. */
int vgets(prompt, buf, bsize)
int prompt; /* the prompt character, or '\0' for none */
char *buf; /* buffer into which the string is read */
int bsize; /* size of the buffer */
{
int len; /* how much we've read so far */
int ch; /* a character from the user */
int quoted; /* is the next char quoted? */
int tab; /* column position of cursor */
char widths[132]; /* widths of characters */
int word; /* index of first letter of word */
#ifndef NO_DIGRAPH
int erased; /* 0, or first char of a digraph */
#endif
/* show the prompt */
move(LINES - 1, 0);
tab = 0;
if (prompt)
{
addch(prompt);
tab = 1;
}
clrtoeol();
refresh();
/* read in the line */
#ifndef NO_DIGRAPH
erased =
#endif
quoted = len = 0;
for (;;)
{
#ifndef NO_ABBR
if (quoted || mode == MODE_EX)
{
ch = getkey(0);
}
else
{
/* maybe expand an abbreviation while getting key */
for (word = len; --word >= 0 && !isspace(buf[word]); )
{
}
word++;
ch = getabkey(WHEN_EX, &buf[word], len - word);
}
#else
ch = getkey(0);
#endif
#ifndef NO_EXTENSIONS
if (ch == ctrl('O'))
{
ch = getkey(quoted ? 0 : WHEN_EX);
}
#endif
/* some special conversions */
#if 0
if (ch == ctrl('D') && len == 0)
ch = ctrl('[');
#endif
#ifndef NO_DIGRAPH
if (*o_digraph && erased != 0 && ch != '\b')
{
ch = digraph(erased, ch);
erased = 0;
}
#endif
/* inhibit detection of special chars (except ^J) after a ^V */
if (quoted && ch != '\n')
{
ch |= 256;
}
/* process the character */
switch(ch)
{
case ctrl('V'):
qaddch('^');
qaddch('\b');
quoted = TRUE;
break;
case ctrl('D'):
return -1;
case ctrl('['):
case '\n':
#if OSK
case '\l':
#else
case '\r':
#endif
clrtoeol();
goto BreakBreak;
#ifndef CRUNCH
case ctrl('U'):
while (len > 0)
{
len--;
while (widths[len]-- > 0)
{
qaddch('\b');
qaddch(' ');
qaddch('\b');
}
}
break;
#endif
case '\b':
if (len > 0)
{
len--;
#ifndef NO_DIGRAPH
erased = buf[len];
#endif
for (ch = widths[len]; ch > 0; ch--)
addch('\b');
if (mode == MODE_EX)
{
clrtoeol();
}
tab -= widths[len];
}
else
{
return -1;
}
break;
default:
/* strip off quotation bit */
if (ch & 256)
{
ch &= ~256;
qaddch(' ');
qaddch('\b');
}
/* add & echo the char */
if (len < bsize - 1)
{
if (ch == '\t' && !quoted)
{
widths[len] = *o_tabstop - (tab % *o_tabstop);
addstr(" " + 8 - widths[len]);
tab += widths[len];
}
else if (ch > 0 && ch < ' ') /* > 0 by GB */
{
addch('^');
addch(ch + '@');
widths[len] = 2;
tab += 2;
}
else if (ch == '\177')
{
addch('^');
addch('?');
widths[len] = 2;
tab += 2;
}
else
{
addch(ch);
widths[len] = 1;
tab++;
}
buf[len++] = ch;
}
else
{
beep();
}
quoted = FALSE;
}
}
BreakBreak:
refresh();
buf[len] = '\0';
return len;
}
static int manymsgs; /* This variable keeps msgs from overwriting each other */
static char pmsg[80]; /* previous message (waiting to be displayed) */
static int showmsg()
{
/* if there is no message to show, then don't */
if (!manymsgs)
return FALSE;
/* display the message */
move(LINES - 1, 0);
if (*pmsg)
{
standout();
qaddch(' ');
qaddstr(pmsg);
qaddch(' ');
standend();
}
clrtoeol();
manymsgs = FALSE;
return TRUE;
}
void endmsgs()
{
if (manymsgs)
{
showmsg();
addch('\n');
}
}
/* Write a message in an appropriate way. This should really be a varargs
* function, but there is no such thing as vwprintw. Hack!!!
*
* In MODE_EX or MODE_COLON, the message is written immediately, with a
* newline at the end.
*
* In MODE_VI, the message is stored in a character buffer. It is not
* displayed until getkey() is called. msg() will call getkey() itself,
* if necessary, to prevent messages from being lost.
*
* msg("") - clears the message line
* msg("%s %d", ...) - does a printf onto the message line
*/
#ifdef __STDC__
void msg (char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
#else
void msg(fmt, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
char *fmt;
long arg1, arg2, arg3, arg4, arg5, arg6, arg7;
{
#endif
if (mode != MODE_VI)
{
#ifdef __STDC__
vsprintf (pmsg, fmt, ap);
#else
sprintf(pmsg, fmt, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
#endif
qaddstr(pmsg);
addch('\n');
exrefresh();
}
else
{
/* wait for keypress between consecutive msgs */
if (manymsgs)
{
getkey(WHEN_MSG);
}
/* real message */
#ifdef __STDC__
vsprintf (pmsg, fmt, ap);
#else
sprintf(pmsg, fmt, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
#endif
if (*fmt)
{
manymsgs = TRUE;
}
}
#ifdef __STDC__
va_end (ap);
#endif
}
/* This function calls refresh() if the option exrefresh is set */
void exrefresh()
{
char *scan;
/* If this ex command wrote ANYTHING set exwrote so vi's : command
* can tell that it must wait for a user keystroke before redrawing.
*/
for (scan=kbuf; scan<stdscr; scan++)
if (*scan == '\n')
exwrote = TRUE;
/* now we do the refresh thing */
if (*o_exrefresh)
{
refresh();
}
else
{
wqrefresh();
}
if (mode != MODE_VI)
{
manymsgs = FALSE;
}
}
/* This structure is used to store maps and abbreviations. The distinction
* between them is that maps are stored in the list referenced by the "maps"
* pointer, while abbreviations are referenced by the "abbrs" pointer.
*/
typedef struct _map
{
struct _map *next; /* another abbreviation */
short len; /* length of the "rawin" characters */
short flags; /* various flags */
char *label; /* label of the map/abbr, or NULL */
char *rawin; /* the "rawin" characters */
char *cooked;/* the "cooked" characters */
} MAP;
static char keybuf[KEYBUFSIZE];
static int cend; /* end of input characters */
static int user; /* from user through end are chars typed by user */
static int next; /* index of the next character to be returned */
static MAP *match; /* the matching map, found by countmatch() */
static MAP *maps; /* the map table */
#ifndef NO_ABBR
static MAP *abbrs; /* the abbreviation table */
#endif
/* ring the terminal's bell */
void beep()
{
/* do a visible/audible bell */
if (*o_flash)
{
do_VB();
refresh();
}
else if (*o_errorbells)
{
tputs("\007", 1, faddch);
}
/* discard any buffered input, and abort macros */
next = user = cend;
}
/* This function replaces a "rawin" character sequence with the "cooked" version,
* by modifying the internal type-ahead buffer.
*/
void execmap(rawlen, cookedstr, visual)
int rawlen; /* length of rawin text -- string to delete */
char *cookedstr; /* the cooked text -- string to insert */
int visual; /* boolean -- chars to be executed in visual mode? */
{
int cookedlen;
char *src, *dst;
int i;
/* find the length of the cooked string */
cookedlen = strlen(cookedstr);
#ifndef NO_EXTENSIONS
if (visual)
{
cookedlen *= 2;
}
#endif
/* if too big to fit in type-ahead buffer, then don't do it */
if (cookedlen + (cend - next) - rawlen > KEYBUFSIZE)
{
return;
}
/* shift to make room for cookedstr at the front of keybuf */
src = &keybuf[next + rawlen];
dst = &keybuf[cookedlen];
i = cend - (next + rawlen);
if (src >= dst)
{
while (i-- > 0)
{
*dst++ = *src++;
}
}
else
{
src += i;
dst += i;
while (i-- > 0)
{
*--dst = *--src;
}
}
/* insert cookedstr, and adjust offsets */
cend += cookedlen - rawlen - next;
user += cookedlen - rawlen - next;
next = 0;
for (dst = keybuf, src = cookedstr; *src; )
{
#ifndef NO_EXTENSIONS
if (visual)
{
*dst++ = ctrl('O');
cookedlen--;
}
#endif
*dst++ = *src++;
}
#ifdef DEBUG2
{
#include <stdio.h>
FILE *debout;
int i;
debout = fopen("debug.out", "a");
fprintf(debout, "After execmap(%d, \"%s\", %d)...\n", rawlen, cookedstr, visual);
for (i = 0; i < cend; i++)
{
if (i == next) fprintf(debout, "(next)");
if (i == user) fprintf(debout, "(user)");
if (UCHAR(keybuf[i]) < ' ')
fprintf(debout, "^%c", keybuf[i] ^ '@');
else
fprintf(debout, "%c", keybuf[i]);
}
fprintf(debout, "(end)\n");
fclose(debout);
}
#endif
}
#ifndef NO_CURSORSHAPE
/* made global so that suspend_curses() can reset it. -nox */
int oldcurs;
#endif
/* This function calls ttyread(). If necessary, it will also redraw the screen,
* change the cursor shape, display the mode, and update the ruler. If the
* number of characters read is 0, and we didn't time-out, then it exits because
* we've apparently reached the end of an EX script.
*/
static int fillkeybuf(when, timeout)
int when; /* mixture of WHEN_XXX flags */
int timeout;/* timeout in 1/10 second increments, or 0 */
{
int nkeys;
#ifndef NO_SHOWMODE
static int oldwhen; /* "when" from last time */
static int oldleft;
static long oldtop;
static long oldnlines;
char *str;
#endif
#ifdef DEBUG
watch();
#endif
#ifndef NO_CURSORSHAPE
/* make sure the cursor is the right shape */
if (has_CQ)
{
if (when != oldcurs)
{
switch (when)
{
case WHEN_EX: do_CX(); break;
case WHEN_VICMD: do_CV(); break;
case WHEN_VIINP: do_CI(); break;
case WHEN_VIREP: do_CR(); break;
}
oldcurs = when;
}
}
#endif
#ifndef NO_SHOWMODE
/* if "showmode" then say which mode we're in */
if (*o_smd && (when & WHENMASK))
{
/* redraw the screen before we check to see whether the
* "showmode" message needs to be redrawn.
*/
redraw(cursor, !(when & WHEN_VICMD));
/* now the "topline" test should be valid */
if (when != oldwhen
|| topline != oldtop
|| leftcol != oldleft
|| nlines != oldnlines)
{
oldwhen = when;
oldtop = topline;
oldleft = leftcol;
oldnlines = nlines;
if (when & WHEN_VICMD) str = "Command";
else if (when & WHEN_VIINP) str = " Input ";
else if (when & WHEN_VIREP) str = "Replace";
else if (when & WHEN_REP1) str = "Replc 1";
else if (when & WHEN_CUT) str = "Buffer ";
else if (when & WHEN_MARK) str = " Mark ";
else if (when & WHEN_CHAR) str = "Dest Ch";
else str = (char *)0;
if (str)
{
move(LINES - 1, COLS - 10);
standout();
qaddstr(str);
standend();
}
}
}
#endif
#ifndef NO_EXTENSIONS
/* maybe display the ruler */
if (*o_ruler && (when & (WHEN_VICMD|WHEN_VIINP|WHEN_VIREP)))
{
char buf[20];
redraw(cursor, !(when & WHEN_VICMD));
pfetch(markline(cursor));
sprintf(buf, "%7ld,%-4d", markline(cursor), 1 + idx2col(cursor, ptext, when & (WHEN_VIINP|WHEN_VIREP)));
move(LINES - 1, COLS - 22);
addstr(buf);
}
#endif
/* redraw, so the cursor is in the right place */
if (when & WHENMASK)
{
redraw(cursor, !(when & (WHENMASK & ~(WHEN_VIREP|WHEN_VIINP))));
}
/* Okay, now we can finally read the rawin keystrokes */
refresh();
nkeys = ttyread(keybuf + cend, sizeof keybuf - cend, timeout);
/* if nkeys == 0 then we've reached EOF of an ex script. */
if (nkeys == 0 && timeout == 0)
{
tmpabort(TRUE);
move(LINES - 1, 0);
clrtoeol();
refresh();
endwin();
exit(exitcode);
}
cend += nkeys;
user += nkeys;
return nkeys;
}
/* This function counts the number of maps that could match the characters
* between &keybuf[next] and &keybuf[cend], including incomplete matches.
* The longest comlete match is remembered via the "match" variable.
*/
static int countmatch(when)
int when; /* mixture of WHEN_XXX flags */
{
MAP *map;
int count;
/* clear the "match" variable */
match = (MAP *)0;
/* check every map */
for (count = 0, map = maps; map; map = map->next)
{
/* can't match if wrong mode */
if ((map->flags & when) == 0)
{
continue;
}
/* would this be a complete match? */
if (map->len <= cend - next)
{
/* Yes, it would be. Now does it really match? */
if (!strncmp(map->rawin, &keybuf[next], map->len))
{
count++;
/* if this is the longest complete match,
* then remember it.
*/
if (!match || match->len < map->len)
{
match = map;
}
}
}
else
{
/* No, it wouldn't. But check for partial match */
if (!strncmp(map->rawin, &keybuf[next], cend - next))
{
/* increment by 2 instead of 1 so that, in the
* event that we have a partial match with a
* single map, we don't mistakenly assume we
* have resolved the map yet.
*/
count += 2;
}
}
}
return count;
}
#ifndef NO_ABBR
/* This function checks to see whether a word is an abbreviation. If it is,
* then an appropriate number of backspoace characters is inserted into the
* type-ahead buffer, followed by the expanded form of the abbreviation.
*/
static void expandabbr(word, wlen)
char *word;
int wlen;
{
MAP *abbr;
/* if the next character wouldn't end the word, then don't expand */
if (isalnum(keybuf[next]) || keybuf[next] == ctrl('V') || keybuf[next] == '\b')
{
return;
}
/* find the abbreviation, if any */
for (abbr = abbrs;
abbr && (abbr->len != wlen || strncmp(abbr->rawin, word, wlen));
abbr = abbr->next)
{
}
/* If an abbreviation was found, then expand it by inserting the long
* version into the type-ahead buffer, and then inserting (in front of
* the long version) enough backspaces to erase to the short version.
*/
if (abbr)
{
execmap(0, abbr->cooked, FALSE);
while (wlen > 15)
{
execmap(0, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b", FALSE);
wlen -= 15;
}
if (wlen > 0)
{
execmap(0, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b" + 15 - wlen, FALSE);
}
}
}
#endif
/* This function calls getabkey() without attempting to expand abbreviations */
int getkey(when)
int when; /* mixture of WHEN_XXX flags */
{
return getabkey(when, "", 0);
}
/* This is it. This function returns keystrokes one-at-a-time, after mapping
* and abbreviations have been taken into account.
*/
int getabkey(when, word, wlen)
int when; /* mixture of WHEN_XXX flags */
char *word; /* a word that may need to be expanded as an abbr */
int wlen; /* length of "word" -- since "word" might not have \0 */
{
int matches;
/* if this key is needed for delay between multiple error messages,
* then reset the manymsgs flag and abort any mapped key sequence.
*/
if (showmsg())
{
if (when == WHEN_MSG)
{
#ifndef CRUNCH
if (!*o_more)
{
refresh();
return ' ';
}
#endif
qaddstr("[More...]");
refresh();
execmap(user, "", FALSE);
}
}
#ifdef DEBUG
/* periodically check for screwed up internal tables */
watch();
#endif
/* if buffer empty, read some characters without timeout */
if (next >= cend)
{
next = user = cend = 0;
fillkeybuf(when, 0);
}
/* try to map the key, unless already mapped and not ":set noremap" */
if (next <= user || *o_remap)
{
do
{
do
{
matches = countmatch(when);
} while (matches > 1 && fillkeybuf(when, *o_keytime) > 0);
if (matches == 1)
{
execmap(match->len, match->cooked,
(match->flags & WHEN_INMV) != 0
&& (when & (WHEN_VIINP|WHEN_VIREP)) != 0);
}
} while (*o_remap && matches == 1);
}
/* ERASEKEY should always be mapped to '\b'. */
if (keybuf[next] == ERASEKEY)
{
keybuf[next] = '\b';
}
#ifndef NO_ABBR
/* try to expand an abbreviation, except in visual command mode */
if (wlen > 0 && (mode & (WHEN_EX|WHEN_VIINP|WHEN_VIREP)) != 0)
{
expandabbr(word, wlen);
}
#endif
/* return the next key */
return keybuf[next++];
}
/* This function maps or unmaps a key */
void mapkey(rawin, cooked, when, name)
char *rawin; /* the input key sequence, before mapping */
char *cooked;/* after mapping -- or NULL to remove map */
int when; /* bitmap of when mapping should happen */
char *name; /* name of the key, NULL for no name, "abbr" for abbr */
{
MAP **head; /* head of list of maps or abbreviations */
MAP *scan; /* used for scanning through the list */
MAP *prev; /* used during deletions */
/* Is this a map or an abbreviation? Choose the right list. */
#ifndef NO_ABBR
head = ((!name || strcmp(name, "abbr")) ? &maps : &abbrs);
#else
head = &maps;
#endif
/* try to find the map in the list */
for (scan = *head, prev = (MAP *)0;
scan && (strcmp(rawin, scan->rawin) && strcmp(rawin, scan->cooked) ||
!(scan->flags & when & (WHEN_EX|WHEN_VICMD|WHEN_VIINP|WHEN_VIREP)));
prev = scan, scan = scan->next)
{
}
/* trying to map? (not unmap) */
if (cooked && *cooked)
{
/* if map starts with "visual ", then mark it as a visual map */
if (head == &maps && !strncmp(cooked, "visual ", 7))
{
cooked += 7;
when |= WHEN_INMV;
}
/* "visual" maps always work in input mode */
if (when & WHEN_INMV)
{
when |= WHEN_VIINP|WHEN_VIREP|WHEN_POPUP;
}
/* if not already in the list, then allocate a new structure */
if (!scan)
{
scan = (MAP *)malloc(sizeof(MAP));
scan->len = strlen(rawin);
scan->rawin = malloc((unsigned)(scan->len + 1));
strcpy(scan->rawin, rawin);
scan->flags = when;
scan->label = name;
if (*head)
{
prev->next = scan;
}
else
{
*head = scan;
}
scan->next = (MAP *)0;
}
else /* recycle old structure */
{
_free_(scan->cooked);
}
scan->cooked = malloc((unsigned)(strlen(cooked) + 1));
strcpy(scan->cooked, cooked);
}
else /* unmapping */
{
/* if nothing to unmap, then exit silently */
if (!scan)
{
return;
}
/* unlink the structure from the list */
if (prev)
{
prev->next = scan->next;
}
else
{
*head = scan->next;
}
/* free it, and the strings that it refers to */
_free_(scan->rawin);
_free_(scan->cooked);
_free_(scan);
}
}
/* This function returns a printable version of a string. It uses tmpblk.c */
char *printable(str)
char *str; /* the string to convert */
{
char *build; /* used for building the string */
for (build = tmpblk.c; *str; str++)
{
#if AMIGA
if (*str == '\233')
{
*build++ = '<';
*build++ = 'C';
*build++ = 'S';
*build++ = 'I';
*build++ = '>';
} else
#endif
if (UCHAR(*str) < ' ' || *str == '\177')
{
*build++ = '^';
*build++ = *str ^ '@';
}
else
{
*build++ = *str;
}
}
*build = '\0';
return tmpblk.c;
}
/* This function displays the contents of either the map table or the
* abbreviation table. User commands call this function as follows:
* :map dumpkey(WHEN_VICMD, FALSE);
* :map! dumpkey(WHEN_VIREP|WHEN_VIINP, FALSE);
* :abbr dumpkey(WHEN_VIINP|WHEN_VIREP, TRUE);
* :abbr! dumpkey(WHEN_EX|WHEN_VIINP|WHEN_VIREP, TRUE);
*/
void dumpkey(when, abbr)
int when; /* WHEN_XXXX of mappings to be dumped */
int abbr; /* boolean: dump abbreviations instead of maps? */
{
MAP *scan;
char *str;
int len;
#ifndef NO_ABBR
for (scan = (abbr ? abbrs : maps); scan; scan = scan->next)
#else
for (scan = maps; scan; scan = scan->next)
#endif
{
/* skip entries that don't match "when" */
if ((scan->flags & when) == 0)
{
continue;
}
/* dump the key label, if any */
if (!abbr)
{
len = 8;
if (scan->label)
{
qaddstr(scan->label);
len -= strlen(scan->label);
}
do
{
qaddch(' ');
} while (len-- > 0);
}
/* dump the rawin version */
str = printable(scan->rawin);
qaddstr(str);
len = strlen(str);
do
{
qaddch(' ');
} while (len++ < 8);
/* dump the mapped version */
#ifndef NO_EXTENSIONS
if ((scan->flags & WHEN_INMV) && (when & (WHEN_VIINP|WHEN_VIREP)))
{
qaddstr("visual ");
}
#endif
str = printable(scan->cooked);
qaddstr(str);
addch('\n');
exrefresh();
}
}
#ifndef NO_MKEXRC
static void safequote(str)
char *str;
{
char *build;
build = tmpblk.c + strlen(tmpblk.c);
while (*str)
{
if (*str <= ' ' && *str >= 1 || *str == '|')
{
*build++ = ctrl('V');
}
*build++ = *str++;
}
*build = '\0';
}
/* This function saves the contents of either the map table or the
* abbreviation table into a file. Both the "bang" and "no bang" versions
* are saved.
* :map dumpkey(WHEN_VICMD, FALSE);
* :map! dumpkey(WHEN_VIREP|WHEN_VIINP, FALSE);
* :abbr dumpkey(WHEN_VIINP|WHEN_VIREP, TRUE);
* :abbr! dumpkey(WHEN_EX|WHEN_VIINP|WHEN_VIREP, TRUE);
*/
void
savemaps(fd, abbr)
int fd; /* file descriptor of an open file to write to */
int abbr; /* boolean: do abbr table? (else do map table) */
{
MAP *scan;
int bang;
int when;
# ifndef NO_ABBR
for (scan = (abbr ? abbrs : maps); scan; scan = scan->next)
# else
for (scan = maps; scan; scan = scan->next)
# endif
{
/* skip maps that have labels, except for function keys */
if (scan->label && *scan->label != '#')
{
continue;
}
for (bang = 0; bang < 2; bang++)
{
/* decide which "when" flags we want */
# ifndef NO_ABBR
if (abbr)
when = (bang ? WHEN_EX|WHEN_VIINP|WHEN_VIREP : WHEN_VIINP|WHEN_VIREP);
else
# endif
when = (bang ? WHEN_VIREP|WHEN_VIINP : WHEN_VICMD);
/* skip entries that don't match "when" */
if ((scan->flags & when) == 0)
{
continue;
}
/* write a "map" or "abbr" command name */
# ifndef NO_ABBR
if (abbr)
strcpy(tmpblk.c, "abbr");
else
# endif
strcpy(tmpblk.c, "map");
/* maybe write a bang. Definitely write a space */
if (bang)
strcat(tmpblk.c, "! ");
else
strcat(tmpblk.c, " ");
/* write the rawin version */
# ifndef NO_FKEY
if (scan->label)
strcat(tmpblk.c, scan->label);
else
# endif
safequote(scan->rawin);
strcat(tmpblk.c, " ");
/* dump the mapped version */
# ifndef NO_EXTENSIONS
if ((scan->flags & WHEN_INMV) && (when & (WHEN_VIINP|WHEN_VIREP)))
{
strcat(tmpblk.c, "visual ");
}
# endif
safequote(scan->cooked);
strcat(tmpblk.c, "\n");
twrite(fd, tmpblk.c, strlen(tmpblk.c));
}
}
}
#endif