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GEMini_Atari_CD-ROM_Walnut_Creek_December_1993.iso
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file.c
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C/C++ Source or Header
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1987-08-24
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17KB
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498 lines
/*
* The routines in this file
* handle the reading and writing of
* disk files. All of details about the
* reading and writing of the disk are
* in "fileio.c".
*/
#include <stdio.h>
#include "ed.h"
unsigned char insflag = FALSE; /* Flag for C mode in newline() */
/*
* Read a file into the current
* buffer. This is really easy; all you do it
* find the name of the file, and call the standard
* "read a file into the current buffer" code.
* Bound to "C-X C-R".
*/
fileread(f, n)
register int f, n;
{
register int s;
char fname[NFILEN];
if ((s=mlreply("Read file: ", fname, NFILEN)) != TRUE)
return (s);
return (readin(fname));
}
/*
* Select a file for editing.
* Look around to see if you can find the
* file 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.
* Bound to C-X C-V.
*/
filevisit(f, n)
register int f, n;
{
register BUFFER *bp;
register WINDOW *wp;
register LINE *lp;
register int i;
register int s;
char bname[NBUFN];
char fname[NFILEN];
if ((s=mlreply("Visit file: ", fname, NFILEN)) != TRUE)
return (s);
strcpy(lastbuf, curbp->b_bname);
for (bp=bheadp; bp!=NULL; bp=bp->b_bufp) {
if ((bp->b_flag&BFTEMP)==0 && strcmp(bp->b_fname, fname)==0) {
if (--curbp->b_nwnd == 0) {
curbp->b_dotp = curwp->w_dotp;
curbp->b_doto = curwp->w_doto;
curbp->b_markp = curwp->w_markp;
curbp->b_marko = curwp->w_marko;
}
curbp = bp;
curwp->w_bufp = bp;
if (bp->b_nwnd++ == 0) {
curwp->w_dotp = bp->b_dotp;
curwp->w_doto = bp->b_doto;
curwp->w_markp = bp->b_markp;
curwp->w_marko = bp->b_marko;
} else {
wp = wheadp;
while (wp != NULL) {
if (wp!=curwp && wp->w_bufp==bp) {
curwp->w_dotp = wp->w_dotp;
curwp->w_doto = wp->w_doto;
curwp->w_markp = wp->w_markp;
curwp->w_marko = wp->w_marko;
break;
}
wp = wp->w_wndp;
}
}
lp = curwp->w_dotp;
i = curwp->w_ntrows/2;
while (i-- && lback(lp)!=curbp->b_linep)
lp = lback(lp);
curwp->w_linep = lp;
curwp->w_flag |= WFMODE|WFHARD;
mlwrite("[Old buffer]");
return (TRUE);
}
}
makename(bname, fname); /* New buffer name. */
while ((bp=bfind(bname, FALSE, 0)) != NULL) {
s = mlreply("Buffer name: ", bname, NBUFN);
if (s == ABORT) /* ^G to just quit */
return (s);
if (s == FALSE) { /* CR to clobber it */
makename(bname, fname);
break;
}
}
if (bp==NULL && (bp=bfind(bname, TRUE, 0))==NULL) {
mlwrite("Cannot create buffer");
return (FALSE);
}
if (--curbp->b_nwnd == 0) { /* Undisplay. */
curbp->b_dotp = curwp->w_dotp;
curbp->b_doto = curwp->w_doto;
curbp->b_markp = curwp->w_markp;
curbp->b_marko = curwp->w_marko;
}
curbp = bp; /* Switch to it. */
curwp->w_bufp = bp;
curbp->b_nwnd++;
return (readin(fname)); /* Read it in. */
}
/*
* Read file "fname" into the current
* buffer, blowing away any text found there. Called
* by both the read and visit commands. Return the final
* status of the read. Also called by the mainline,
* to read in a file specified on the command line as
* an argument.
*/
readin(fname)
char fname[];
{
register LINE *lp1;
register LINE *lp2;
register int i;
register WINDOW *wp;
register BUFFER *bp;
register int s;
register int nbytes;
register int nline;
char line[NLINE];
bp = curbp; /* Cheap. */
if ((s=bclear(bp)) != TRUE) /* Might be old. */
return (s);
bp->b_flag &= ~(BFTEMP|BFCHG);
if (fname[0] == '~') /* an alias request */
if ((s=parsefn(fname))==FALSE)
s = FIOFNF;
strcpy(bp->b_fname, fname);
if ((s=ffropen(fname)) == FIOERR) /* Hard file open. */
goto out;
if (s == FIOFNF) { /* File not found. */
mlwrite("[New file]");
goto out;
}
mlwrite("[Reading %s]",fname);
nline = 0;
while ((s=ffgetline(line, NLINE)) == FIOSUC) {
nbytes = strlen(line);
if ((lp1=lalloc(nbytes)) == NULL) {
s = FIOERR; /* Keep message on the */
break; /* display. */
}
lp2 = lback(curbp->b_linep);
lp2->l_fp = lp1;
lp1->l_fp = curbp->b_linep;
lp1->l_bp = lp2;
curbp->b_linep->l_bp = lp1;
for (i=0; i<nbytes; ++i)
lputc(lp1, i, line[i]);
++nline;
}
ffclose(); /* Ignore errors. */
if (s == FIOEOF) { /* Don't zap message! */
if (nline == 1)
mlwrite("[Read %d line]",nline);
else
mlwrite("[Read %d lines]", nline);
}
out:
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 = curwp->w_dotp;
wp->w_marko = 0;
wp->w_flag |= WFMODE|WFHARD;
}
}
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.
* I suppose that this information could be put in
* a better place than a line of code.
*/
makename(bname, fname)
char bname[];
char fname[];
{
register char *cp1;
register char *cp2;
if (fname[0] == '~')
parsefn(fname);
cp1 = &fname[0];
while (*cp1 != 0)
++cp1;
#if VMS
while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!=']')
--cp1;
#endif
#if CPM
while (cp1!=&fname[0] && cp1[-1]!=':')
--cp1;
#endif
#if ST
while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\')
--cp1;
#endif
#if V7
while (cp1!=&fname[0] && cp1[-1]!='/')
--cp1;
#endif
cp2 = &bname[0];
while (cp2!=&bname[NBUFN-1] && *cp1!=0 && *cp1!=';')
*cp2++ = *cp1++;
*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. Bound to "C-X C-W".
*/
filewrite(f, n)
register int f, n;
{
register int s;
char fname[NFILEN];
if ((s=mlreply("Write file: ", fname, NFILEN)) != TRUE)
return (s);
if ((s=writeout(fname)) == TRUE) {
strcpy(curbp->b_fname, fname);
curbp->b_flag &= ~BFCHG;
upmode(); /* Update mode lines. */
}
return (s);
}
/*
* Save the contents of the current
* buffer in its associatd file. No nothing
* if nothing has changed (this may be a bug, not a
* feature). Error if there is no remembered file
* name for the buffer. Bound to "C-X C-S". May
* get called by "C-Z".
*/
filesave(f, n)
register int f, n;
{
register int s;
if ((curbp->b_flag&BFCHG) == 0) /* Return, no changes. */
return (TRUE);
if (curbp->b_fname[0] == 0) { /* Must have a name. */
filename(f,n); /* prompt user for a name */
if (curbp->b_fname[0] == 0) /* still no name */
return (FALSE);
}
if ((s=writeout(curbp->b_fname)) == TRUE) {
curbp->b_flag &= ~BFCHG;
upmode(); /* Update mode lines. */
}
return (s);
}
/*
* This function performs the details of file
* writing. Uses the file management routines in the
* "fileio.c" package. The number of lines written is
* displayed. Sadly, it looks inside a LINE; provide
* a macro for this. Most of the grief is error
* checking of some sort.
*/
writeout(fn)
char fn[];
{
register int s;
register LINE *lp;
register int nline;
if (fn[0] == '~') /* an alias request */
if ((s=parsefn(fn))==FALSE)
return(FALSE);
if ((s=ffwopen(fn)) != FIOSUC) /* Open writes message. */
return (FALSE);
mlwrite("[Writing: %s]", fn);
lp = lforw(curbp->b_linep); /* First line. */
nline = 0; /* Number of lines. */
while (lp != curbp->b_linep) {
if ((s=ffputline(&lp->l_text[0], llength(lp))) != FIOSUC)
break;
++nline;
lp = lforw(lp);
}
if (s == FIOSUC) { /* No write error. */
s = ffclose();
if (s == FIOSUC) { /* No close error. */
if (nline == 1)
mlwrite("[Wrote %d line]",nline);
else
mlwrite("[Wrote %d lines]", nline);
}
} else /* Ignore close error */
ffclose(); /* if a write error. */
if (s != FIOSUC) /* Some sort of error. */
return (FALSE);
return (TRUE);
}
/*
* The command allows the user
* to modify the file name associated with
* the current buffer. It is like the "f" command
* in UNIX "ed". The operation is simple; just zap
* the name in the BUFFER structure, and mark the windows
* as needing an update. You can type a blank line at the
* prompt if you wish.
*/
filename(f, n)
register int f, n;
{
register int s;
char fname[NFILEN];
if ((s=mlreply("Name: ", fname, NFILEN)) == ABORT)
return (s);
if (fname[0] == '~') /* an alias request */
s=parsefn(fname);
if (s == FALSE)
strcpy(curbp->b_fname, "");
else
strcpy(curbp->b_fname, fname);
upmode();
return (TRUE);
}
/* WRITEREG eXtended command Write defined region to file. Prompt
* for filename. Error if any sub-function returns failure. Bound to
* CTLX-R.
*/
writereg(f, n)
register int f, n;
{
register int s;
char buf[NLINE];
char fname[NFILEN];
n = 0;
f = 0;
if ((s=mlreply("Write region: ", fname, NFILEN)) == ABORT || s == FALSE)
return(s);
if (copyregion(NULL, NULL) != TRUE)
return (FALSE);
if ((s=ffwopen(fname)) != FIOSUC)
return (s);
while ((s=kremove(n++)) != EOF)
{
if (s != '\n' && f < NLINE)
buf[f++] = s;
else
{
ffputline(buf, f);
f=0;
}
}
if ((s=ffclose()) == FIOERR)
return(s);
else
mlwrite("[Region written to %s]",fname);
return(TRUE);
}
/* FILEINSERT eXtended command insert existing file at point. All of the
* necessary updating is done by the usual insert commands. Bound to ^X-I.
*/
fileinsert(f, n)
register int f, n;
{
char fname[NFILEN];
char line[NLINE];
register int c;
register int nline;
register int omarko;
register LINE *omarkp;
nline = 0;
if ((f=mlreply("Insert file: ", fname, NFILEN)) == ABORT || f == FALSE)
return(f);
if (fname[0] == '~')
if ((f=parsefn(fname))==FALSE)
return(f);
if (ffropen(fname) == FIOFNF)
{
mlwrite("File: %s not found", fname);
return (FALSE);
}
insflag = TRUE;
/* save current place in buffer */
if ((omarkp=lback(curwp->w_dotp)) == curbp->b_linep)
omarkp = NULL;
omarko = curwp->w_doto;
mlwrite("[Mark set]");
/* the standard routines take care of update */
while ((f=ffgetline(line, NLINE)) == FIOSUC)
{
n = 0;
++nline;
while ((c=line[n++]) !=NULL)
if (linsert(1, c) == FALSE)
{
insflag = FALSE;
return (FALSE);
}
if (newline(FALSE, 1) == FALSE)
{
insflag = FALSE;
return (FALSE);
}
}
ffclose();
if (f == FIOEOF)
{
if (nline == 1)
mlwrite("[Inserted %d line]",nline);
else
mlwrite("[Inserted %d lines]", nline);
}
insflag = FALSE;
/* The following code is needed if we want to insert a file
* the way GNU does (returning to the point of insertion
* when done). The problem is with files inserted when the
* current point is at the end or beginning of the buffer.
*/
if (omarkp == NULL)
/* inserted at beginning */
{
curwp->w_markp = curwp->w_dotp;
curwp->w_marko = curwp->w_doto;
gotobob(FALSE,TRUE);
curwp->w_doto = omarko;
}
else
/* inserted at end or in the midst */
{
curwp->w_markp = omarkp;
curwp->w_marko = omarko;
swapmark(FALSE,TRUE);
forwline(NULL,1);
}
if (f == FIOERR)
return (FALSE);
return (TRUE);
}
parsefn(fname)
char fname[];
{
register char *ptr;
char *index(), *alias();
char template[NFILEN];
if ((ptr=index(fname,'\\'))!=(char *)NULL)
{
*ptr = '\0'; /* ptr++==file; fname==alias */
if (alias(&template[0],&fname[1])==(char *)NULL)
return(FALSE);
strcat(template,++ptr);
strcpy(fname,template);
}
else
return(FALSE);
return(TRUE);
}