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- /*
- * 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);
- }
-