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- /* FILE.C: for MicroEMACS
-
- The routines in this file handle the reading, writing
- and lookup of disk files. All of details about the
- reading and writing of the disk are in "fileio.c".
-
- */
-
- #include <stdio.h>
- #include "estruct.h"
- #include "edef.h"
-
- #if MEGAMAX
- overlay "file"
- #endif
-
- /*
- * 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 s;
- char fname[NFILEN];
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if ((s=mlreply("Read file: ", fname, NFILEN)) != TRUE)
- return(s);
- return(readin(fname, TRUE));
- }
-
- /*
- * Insert a file into the current
- * buffer. This is really easy; all you do it
- * find the name of the file, and call the standard
- * "insert a file into the current buffer" code.
- * Bound to "C-X C-I".
- */
- insfile(f, n)
- {
- register int s;
- char fname[NFILEN];
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=mlreply("Insert file: ", fname, NFILEN)) != TRUE)
- return(s);
- return(ifile(fname));
- }
-
- /*
- * 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.
- * Bound to C-X C-F.
- */
- filefind(f, n)
- {
- char fname[NFILEN]; /* file user wishes to find */
- register int s; /* status return */
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if ((s=mlreply("Find file: ", fname, NFILEN)) != TRUE)
- return(s);
- return(getfile(fname, TRUE));
- }
-
- viewfile(f, n) /* visit a file in VIEW mode */
- {
- char fname[NFILEN]; /* file user wishes to find */
- register int s; /* status return */
- register WINDOW *wp; /* scan for windows that need updating */
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if ((s=mlreply("View file: ", fname, NFILEN)) != TRUE)
- return (s);
- s = getfile(fname, FALSE);
- if (s) { /* if we succeed, put it in view mode */
- curwp->w_bufp->b_mode |= MDVIEW;
-
- /* scan through and update mode lines of all windows */
- wp = wheadp;
- while (wp != NULL) {
- wp->w_flag |= WFMODE;
- wp = wp->w_wndp;
- }
- }
- return(s);
- }
-
- #if CRYPT
- resetkey() /* reset the encryption key if needed */
-
- {
- register int s; /* return status */
-
- /* turn off the encryption flag */
- cryptflag = FALSE;
-
- /* if we are in crypt mode */
- if (curbp->b_mode & MDCRYPT) {
- if (curbp->b_key[0] == 0) {
- s = setkey(FALSE, 0);
- if (s != TRUE)
- return(s);
- }
-
- /* let others know... */
- cryptflag = TRUE;
-
- /* and set up the key to be used! */
- /* de-encrypt it */
- crypt((char *)NULL, 0);
- crypt(curbp->b_key, strlen(curbp->b_key));
-
- /* re-encrypt it...seeding it to start */
- crypt((char *)NULL, 0);
- crypt(curbp->b_key, strlen(curbp->b_key));
- }
-
- return(TRUE);
- }
- #endif
-
- getfile(fname, lockfl)
-
- char fname[]; /* file name to find */
- int lockfl; /* check the file for locks? */
-
- {
- register BUFFER *bp;
- register LINE *lp;
- register int i;
- register int s;
- char bname[NBUFN]; /* buffer name to put file */
-
- for (bp=bheadp; bp!=NULL; bp=bp->b_bufp) {
- if ((bp->b_flag&BFINVS)==0 && strcmp(bp->b_fname, fname)==0) {
- swbuffer(bp);
- 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, lockfl)); /* Read it in. */
- }
-
- /*
- * Read file "fname" into the current
- * buffer, blowing away any text found there. Called
- * by both the read and find 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. If the filename ends in a ".c", CMODE is
- * set for the current buffer.
- */
- readin(fname, lockfl)
-
- char fname[]; /* name of file to read */
- int lockfl; /* check for file locks? */
-
- {
- register LINE *lp1;
- register LINE *lp2;
- register int i;
- register WINDOW *wp;
- register BUFFER *bp;
- register int s;
- register int nbytes;
- register int nline;
- register char *sptr; /* pointer into filename string */
- int lflag; /* any lines longer than allowed? */
- char line[NLINE];
-
- #if FILOCK
- if (lockfl && lockchk(fname) == ABORT)
- return(ABORT);
- #endif
- #if CRYPT
- s = resetkey();
- if (s != TRUE)
- return(s);
- #endif
- bp = curbp; /* Cheap. */
- if ((s=bclear(bp)) != TRUE) /* Might be old. */
- return (s);
- bp->b_flag &= ~(BFINVS|BFCHG);
- #if ACMODE
- if (strlen(fname) > 1) { /* check if a 'C' file */
- sptr = fname + strlen(fname) - 2;
- if (*sptr == '.' &&
- (*(sptr + 1) == 'c' || *(sptr + 1) == 'h'))
- bp->b_mode |= MDCMOD;
- }
- #endif
- strcpy(bp->b_fname, fname);
-
- /* turn off ALL keyboard translation in case we get a dos error */
- TTkclose();
-
- if ((s=ffropen(fname)) == FIOERR) /* Hard file open. */
- goto out;
- if (s == FIOFNF) { /* File not found. */
- mlwrite("[New file]");
- goto out;
- }
- mlwrite("[Reading file]");
- nline = 0;
- lflag = FALSE;
- while ((s=ffgetline(line, NLINE)) == FIOSUC || s == FIOLNG
- || s == FIOFUN) {
- if (s == FIOLNG) {
- lflag = TRUE;
- --nline;
- }
- 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;
- if (s == FIOFUN)
- break;
- }
- ffclose(); /* Ignore errors. */
- strcpy(line, "[");
- if (lflag)
- strcat(line, "Long lines wrapped, ");
- if (s == FIOFUN)
- strcat(line, "Funny line at EOF, ");
- if (s == FIOEOF || s == FIOFUN) { /* Don't zap message! */
- sprintf(&line[strlen(line)], "Read %d line", nline);
- if (nline > 1)
- strcat(line, "s");
- strcat(line, "]");
- }
- if (s != FIOERR)
- mlwrite(line);
-
- out:
- TTkopen(); /* open the keyboard again */
- 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;
- wp->w_flag |= WFMODE|WFHARD;
- }
- }
- if (s == FIOERR || s == FIOFNF) /* 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;
-
- cp1 = &fname[0];
- while (*cp1 != 0)
- ++cp1;
-
- #if AMIGA
- while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='/')
- --cp1;
- #endif
- #if VMS
- while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!=']')
- --cp1;
- #endif
- #if CPM
- while (cp1!=&fname[0] && cp1[-1]!=':')
- --cp1;
- #endif
- #if MSDOS
- while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\'&&cp1[-1]!='/')
- --cp1;
- #endif
- #if ST520
- while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\')
- --cp1;
- #endif
- #if FINDER
- while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\'&&cp1[-1]!='/')
- --cp1;
- #endif
- #if V7 | USG | BSD
- 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 WINDOW *wp;
- register int s;
- char fname[NFILEN];
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if ((s=mlreply("Write file: ", fname, NFILEN)) != TRUE)
- return (s);
- if ((s=writeout(fname)) == TRUE) {
- strcpy(curbp->b_fname, fname);
- curbp->b_flag &= ~BFCHG;
- wp = wheadp; /* Update mode lines. */
- while (wp != NULL) {
- if (wp->w_bufp == curbp)
- wp->w_flag |= WFMODE;
- wp = wp->w_wndp;
- }
- }
- 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 WINDOW *wp;
- register int s;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((curbp->b_flag&BFCHG) == 0) /* Return, no changes. */
- return (TRUE);
- if (curbp->b_fname[0] == 0) { /* Must have a name. */
- mlwrite("No file name");
- return (FALSE);
- }
- if ((s=writeout(curbp->b_fname)) == TRUE) {
- curbp->b_flag &= ~BFCHG;
- wp = wheadp; /* Update mode lines. */
- while (wp != NULL) {
- if (wp->w_bufp == curbp)
- wp->w_flag |= WFMODE;
- wp = wp->w_wndp;
- }
- }
- 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 CRYPT
- s = resetkey();
- if (s != TRUE)
- return(s);
- #endif
- /* turn off ALL keyboard translation in case we get a dos error */
- TTkclose();
-
- if ((s=ffwopen(fn)) != FIOSUC) { /* Open writes message. */
- TTkopen();
- return (FALSE);
- }
- mlwrite("[Writing..]"); /* tell us were writing */
- 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 1 line]");
- else
- mlwrite("[Wrote %d lines]", nline);
- }
- } else /* Ignore close error */
- ffclose(); /* if a write error. */
- TTkopen();
- 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 WINDOW *wp;
- register int s;
- char fname[NFILEN];
-
- if (restflag) /* don't allow this command if restricted */
- return(resterr());
- if ((s=mlreply("Name: ", fname, NFILEN)) == ABORT)
- return (s);
- if (s == FALSE)
- strcpy(curbp->b_fname, "");
- else
- strcpy(curbp->b_fname, fname);
- wp = wheadp; /* Update mode lines. */
- while (wp != NULL) {
- if (wp->w_bufp == curbp)
- wp->w_flag |= WFMODE;
- wp = wp->w_wndp;
- }
- curbp->b_mode &= ~MDVIEW; /* no longer read only mode */
- return (TRUE);
- }
-
- /*
- * Insert file "fname" into the current
- * buffer, Called by insert file command. Return the final
- * status of the read.
- */
- ifile(fname)
- char fname[];
- {
- register LINE *lp0;
- register LINE *lp1;
- register LINE *lp2;
- register int i;
- register BUFFER *bp;
- register int s;
- register int nbytes;
- register int nline;
- int lflag; /* any lines longer than allowed? */
- char line[NLINE];
-
- bp = curbp; /* Cheap. */
- bp->b_flag |= BFCHG; /* we have changed */
- bp->b_flag &= ~BFINVS; /* and are not temporary*/
- if ((s=ffropen(fname)) == FIOERR) /* Hard file open. */
- goto out;
- if (s == FIOFNF) { /* File not found. */
- mlwrite("[No such file]");
- return(FALSE);
- }
- mlwrite("[Inserting file]");
-
- #if CRYPT
- s = resetkey();
- if (s != TRUE)
- return(s);
- #endif
- /* back up a line and save the mark here */
- curwp->w_dotp = lback(curwp->w_dotp);
- curwp->w_doto = 0;
- curwp->w_markp = curwp->w_dotp;
- curwp->w_marko = 0;
-
- nline = 0;
- lflag = FALSE;
- while ((s=ffgetline(line, NLINE)) == FIOSUC || s == FIOLNG
- || s == FIOFUN) {
- if (s == FIOLNG) {
- lflag = TRUE;
- --nline;
- }
- nbytes = strlen(line);
- if ((lp1=lalloc(nbytes)) == NULL) {
- s = FIOERR; /* Keep message on the */
- break; /* display. */
- }
- lp0 = curwp->w_dotp; /* line previous to insert */
- lp2 = lp0->l_fp; /* line after insert */
-
- /* re-link new line between lp0 and lp2 */
- lp2->l_bp = lp1;
- lp0->l_fp = lp1;
- lp1->l_bp = lp0;
- lp1->l_fp = lp2;
-
- /* and advance and write out the current line */
- curwp->w_dotp = lp1;
- for (i=0; i<nbytes; ++i)
- lputc(lp1, i, line[i]);
- ++nline;
- if (s == FIOFUN)
- break;
- }
- ffclose(); /* Ignore errors. */
- curwp->w_markp = lforw(curwp->w_markp);
- strcpy(line, "[");
- if (lflag)
- strcat(line, "Long lines wrapped, ");
- if (s == FIOFUN)
- strcat(line, "Funny line at EOF, ");
- if (s == FIOEOF || s == FIOFUN) { /* Don't zap message! */
- sprintf(&line[strlen(line)], "Inserted %d line", nline);
- if (nline > 1)
- strcat(line, "s");
- strcat(line, "]");
- }
- if (s != FIOERR)
- mlwrite(line);
- out:
- /* advance to the next line and mark the window for changes */
- curwp->w_dotp = lforw(curwp->w_dotp);
- curwp->w_flag |= WFHARD | WFMODE;
-
- /* copy window parameters back to the buffer structure */
- curbp->b_dotp = curwp->w_dotp;
- curbp->b_doto = curwp->w_doto;
- curbp->b_markp = curwp->w_markp;
- curbp->b_marko = curwp->w_marko;
-
- if (s == FIOERR) /* False if error. */
- return (FALSE);
- return (TRUE);
- }
-