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Almathera Ten Pack 2: CDPD 1
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Almathera Ten on Ten - Disc 2: CDPD 1.iso
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pd
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026-050
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042
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mg1a
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file.c
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C/C++ Source or Header
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1995-03-13
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10KB
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378 lines
/*
* File commands.
*/
#include "def.h"
BUFFER *findbuffer();
/*
* insert a file into the current buffer. Real easy - just call the
* insertfile routine with the file name.
*/
/*ARGSUSED*/
fileinsert(f, n, k) {
register int s;
char fname[NFILEN];
if ((s=ereply("Insert file: ", fname, NFILEN)) != TRUE)
return (s);
adjustcase(fname);
return (insertfile(fname, (char *) NULL)); /* don't set buffer name */
}
/*
* Select a file for editing.
* Look around to see if you can find the
* fine in another buffer; if you can find it
* just switch to the buffer. If you cannot find
* the file, create a new buffer, read in the
* text, and switch to the new buffer.
*/
/*ARGSUSED*/
filevisit(f, n, k) {
register BUFFER *bp;
int s;
char fname[NFILEN];
if ((s=ereply("Find file: ", fname, NFILEN)) != TRUE)
return (s);
if ((bp = findbuffer(fname, &s)) == NULL) return s;
curbp = bp;
if (showbuffer(bp, curwp, WFHARD) != TRUE) return FALSE;
if (bp->b_fname[0] == 0)
return (readin(fname)); /* Read it in. */
return TRUE;
}
/*
* Pop to a file in the other window. Same as last function, just
* popbuf instead of showbuffer.
*/
/*ARGSUSED*/
poptofile(f, n, k) {
register BUFFER *bp;
register WINDOW *wp;
int s;
char fname[NFILEN];
if ((s=ereply("Find file in other window: ", fname, NFILEN)) != TRUE)
return (s);
if ((bp = findbuffer(fname, &s)) == NULL) return s;
if ((wp = popbuf(bp)) == NULL) return FALSE;
curbp = bp;
curwp = wp;
if (bp->b_fname[0] == 0)
return (readin(fname)); /* Read it in. */
return TRUE;
}
/*
* given a file name, either find the buffer it uses, or create a new
* empty buffer to put it in.
*/
BUFFER *
findbuffer(fname, s) char *fname; int *s; {
register BUFFER *bp;
char bname[NBUFN];
adjustcase(fname);
for (bp=bheadp; bp!=NULL; bp=bp->b_bufp) {
if (strcmp(bp->b_fname, fname) == 0) {
return bp;
}
}
makename(bname, fname); /* New buffer name. */
while ((bp=bfind(bname, FALSE)) != NULL) {
*s = ereply("Buffer name: ", bname, NBUFN);
if (*s == ABORT) /* ^G to just quit */
return NULL;
if (*s == FALSE) { /* CR to clobber it */
bp->b_fname[0] = '\0';
break;
}
}
if (bp == NULL) bp = bfind(bname, TRUE);
*s = FALSE;
return bp;
}
/*
* Read the file "fname" into the current buffer.
* Make all of the text in the buffer go away, after checking
* for unsaved changes. This is called by the "read" command, the
* "visit" command, and the mainline (for "uemacs file").
*/
readin(fname) char *fname; {
register int status;
register WINDOW *wp;
if (bclear(curbp) != TRUE) /* Might be old. */
return TRUE;
status = insertfile(fname, fname) ;
curbp->b_flag &= ~BFCHG; /* No change. */
for (wp=wheadp; wp!=NULL; wp=wp->w_wndp) {
if (wp->w_bufp == curbp) {
wp->w_linep = lforw(curbp->b_linep);
wp->w_dotp = lforw(curbp->b_linep);
wp->w_doto = 0;
wp->w_markp = NULL;
wp->w_marko = 0;
}
}
return status;
}
/*
* insert a file in the current buffer, after dot. Set mark
* at the end of the text inserted, point at the beginning.
* Return a standard status. Print a summary (lines read,
* error message) out as well. If the
* BACKUP conditional is set, then this routine also does the read
* end of backup processing. The BFBAK flag, if set in a buffer,
* says that a backup should be taken. It is set when a file is
* read in, but not on a new file (you don't need to make a backup
* copy of nothing).
*
* Warning: Adds a trainling nl to files that don't end in one!
* Need to fix, but later (I suspect that it will require a change
* in the fileio files for all systems involved).
*/
insertfile(fname, newname) char fname[], newname[]; {
register LINE *lp1;
register LINE *lp2;
LINE *olp; /* Line we started at */
int opos; /* and offset into it */
register WINDOW *wp;
register int i;
register int nbytes;
int s, nline;
BUFFER *bp;
char line[NLINE];
bp = curbp; /* Cheap. */
if (newname != (char *) NULL)
(VOID) strcpy(bp->b_fname, newname);
if ((s=ffropen(fname)) == FIOERR) /* Hard file open. */
goto out;
if (s == FIOFNF) { /* File not found. */
if (kbdmop == NULL)
if (newname != NULL)
ewprintf("(New file)");
else ewprintf("(File not found)");
goto out;
}
opos = curwp->w_doto;
/* Open a new line, at point, and start inserting after it */
(VOID) lnewline();
olp = lback(curwp->w_dotp);
nline = 0; /* Don't count fake line at end */
while ((s=ffgetline(line, NLINE)) == FIOSUC) {
nbytes = strlen(line);
if ((lp1=lalloc((RSIZE) nbytes)) == NULL) {
s = FIOERR; /* Keep message on the */
break; /* display. */
}
lp2 = lback(curwp->w_dotp);
lp2->l_fp = lp1;
lp1->l_fp = curwp->w_dotp;
lp1->l_bp = lp2;
curwp->w_dotp->l_bp = lp1;
for (i=0; i<nbytes; ++i)
lputc(lp1, i, line[i]);
++nline;
}
(VOID) ffclose(); /* Ignore errors. */
if (s==FIOEOF && kbdmop==NULL) { /* Don't zap an error. */
if (nline == 1)
ewprintf("(Read 1 line)");
else
ewprintf("(Read %d lines)", nline);
}
/* Set mark at the end of the text */
curwp->w_markp = curwp->w_dotp;
curwp->w_marko = curwp->w_doto;
/* Now, delete the results of the lnewline we started with */
curwp->w_dotp = olp;
curwp->w_doto = opos;
(VOID) ldelnewline();
curwp->w_doto = opos; /* and dot is right */
#ifdef BACKUP
if (newname != NULL)
bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
else bp->b_flag |= BFCHG;
#else
bp->b_flag |= BFCHG;
#endif
/* if the insert was at the end of buffer, set lp1 to the end of
* buffer line, and lp2 to the beginning of the newly inserted
* text. (Otherwise lp2 is set to NULL.) This is
* used below to set pointers in other windows correctly if they
* are also at the end of buffer.
*/
lp1 = bp->b_linep;
if (curwp->w_markp == lp1)
lp2 = curwp->w_dotp;
else {
out: lp2 = NULL;
}
for (wp=wheadp; wp!=NULL; wp=wp->w_wndp) {
if (wp->w_bufp == curbp) {
wp->w_flag |= WFMODE|WFEDIT;
if (wp != curwp && lp2 != NULL) {
if (wp->w_dotp == lp1)
wp->w_dotp = lp2;
if (wp->w_markp == lp1)
wp->w_markp = lp2;
if (wp->w_linep == lp1)
wp->w_linep = lp2;
}
}
}
if (s == FIOERR) /* False if error. */
return (FALSE);
return (TRUE);
}
/*
* Take a file name, and from it
* fabricate a buffer name. This routine knows
* about the syntax of file names on the target system.
* BDC1 left scan delimiter.
* BDC2 optional second left scan delimiter.
* BDC3 optional right scan delimiter.
*/
makename(bname, fname) char bname[]; char fname[]; {
register char *cp1;
register char *cp2;
cp1 = &fname[0];
while (*cp1 != 0)
++cp1;
#ifdef BDC2
while (cp1!=&fname[0] && cp1[-1]!=BDC1 && cp1[-1]!=BDC2)
--cp1;
#else
while (cp1!=&fname[0] && cp1[-1]!=BDC1)
--cp1;
#endif
cp2 = &bname[0];
#ifdef BDC3
while (cp2!=&bname[NBUFN-1] && *cp1!=0 && *cp1!=BDC3)
*cp2++ = *cp1++;
#else
while (cp2!=&bname[NBUFN-1] && *cp1!=0)
*cp2++ = *cp1++;
#endif
*cp2 = 0;
}
/*
* Ask for a file name, and write the
* contents of the current buffer to that file.
* Update the remembered file name and clear the
* buffer changed flag. This handling of file names
* is different from the earlier versions, and
* is more compatable with Gosling EMACS than
* with ITS EMACS.
*/
/*ARGSUSED*/
filewrite(f, n, k) {
register int s;
char fname[NFILEN];
if ((s=ereply("Write file: ", fname, NFILEN)) != TRUE)
return (s);
adjustcase(fname);
if ((s=writeout(curbp, fname)) == TRUE) {
(VOID) strcpy(curbp->b_fname, fname);
#ifdef BACKUP
curbp->b_flag &= ~(BFBAK | BFCHG);
#else
curbp->b_flag &= ~BFCHG;
#endif
upmodes(curbp);
}
return (s);
}
/*
* Save the contents of the current buffer back into
* its associated file. Do nothing if there have been no changes
* (is this a bug, or a feature). Error if there is no remembered
* file name. If this is the first write since the read or visit,
* then a backup copy of the file is made.
*/
/*ARGSUSED*/
filesave(f, n, k) {
register int s;
if ((curbp->b_flag&BFCHG) == 0) { /* Return, no changes. */
if (kbdmop == NULL) ewprintf("(No changes need to be saved)");
return (TRUE);
}
if (curbp->b_fname[0] == 0) { /* Must have a name. */
ewprintf("No file name");
return (FALSE);
}
#ifdef BACKUP
if ((curbp->b_flag&BFBAK) != 0) {
s = fbackupfile(curbp->b_fname);
if (s == ABORT) /* Hard error. */
return FALSE;
if (s == FALSE /* Softer error. */
&& (s=eyesno("Backup error, save anyway")) != TRUE)
return (s);
}
#endif
if ((s=writeout(curbp, curbp->b_fname)) == TRUE) {
#ifdef BACKUP
curbp->b_flag &= ~(BFCHG | BFBAK);
#else
curbp->b_flag &= ~BFCHG;
#endif
upmodes(curbp);
}
return (s);
}
/*
* This function performs the details of file
* writing; writing the file in buffer bp to
* file fn. Uses the file management routines
* in the "fileio.c" package. Most of the grief
* is checking of some sort.
*/
writeout(bp, fn) register BUFFER *bp; char *fn; {
register int s;
register LINE *lp;
if ((s=ffwopen(fn)) != FIOSUC) /* Open writes message. */
return (FALSE);
lp = lforw(bp->b_linep); /* First line. */
while (lp != bp->b_linep) {
if ((s=ffputline(&(ltext(lp))[0], llength(lp))) != FIOSUC)
break;
lp = lforw(lp);
}
if (s == FIOSUC) { /* No write error. */
s = ffclose();
if (s==FIOSUC && kbdmop==NULL)
ewprintf("Wrote %s", fn);
} else /* Ignore close error */
(VOID) ffclose(); /* if a write error. */
if (s != FIOSUC) /* Some sort of error. */
return (FALSE);
return (TRUE);
}
/*
* Tag all windows for bp (all windows if bp NULL) as needing their
* mode line updated.
*/
upmodes(bp) register BUFFER *bp; {
register WINDOW *wp;
for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
if (bp == NULL || curwp->w_bufp == bp) wp->w_flag |= WFMODE;
}