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uemacs/file.c

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/* file.c -- implements file.h */
#include "file.h"
/* file.c
*
* 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".
*
* modified by Petri Kutvonen
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "buffer.h"
#include "crypt.h"
#include "defines.h"
#include "estruct.h"
#include "execute.h"
#include "fileio.h"
#include "input.h"
#include "line.h"
#include "lock.h"
#include "mlout.h"
#include "window.h"
#if PKCODE
/* Max number of lines from one file. */
#define MAXNLINE 10000000
#endif
typedef enum {
EOL_NONE,
EOL_UNIX,
EOL_DOS,
EOL_MAC,
EOL_MIXED
} eoltype ;
static const char *eolname[] = {
"NONE",
"UNIX",
"DOS",
"MAC",
"MIXED"
} ;
static const char *codename[] = {
"ASCII",
"UTF-8",
"EXTENDED",
"MIXED"
} ;
boolean restflag = FALSE ; /* restricted use? */
static int ifile( const char *fname) ;
boolean resterr( void) {
mloutfmt( "%B(That command is RESTRICTED)") ;
return FALSE ;
}
/*
* 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".
*/
int fileread(int f, int n)
{
int s;
fname_t fname ;
if (restflag) /* don't allow this command if restricted */
return resterr();
if ((s = mlreply("Read file: ", fname, sizeof fname)) != 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".
*/
int insfile(int f, int n)
{
int s;
fname_t fname ;
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, sizeof fname)) != TRUE)
return s;
if ((s = ifile(fname)) != TRUE)
return s;
return reposition(TRUE, -1);
}
/*
* 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.
*/
int filefind(int f, int n)
{
fname_t fname ; /* file user wishes to find */
int s; /* status return */
if (restflag) /* don't allow this command if restricted */
return resterr();
if ((s = mlreply("Find file: ", fname, sizeof fname)) != TRUE)
return s;
return getfile(fname, TRUE);
}
int viewfile(int f, int n)
{ /* visit a file in VIEW mode */
fname_t fname ; /* file user wishes to find */
int s; /* status return */
struct 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, sizeof fname)) != 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
void cryptbufferkey( struct buffer *bp) {
myencrypt( (char *) NULL, 0) ;
myencrypt( bp->b_key, strlen( bp->b_key)) ;
}
/*
* reset encryption key of current buffer
*
* int f; default flag
* int n; numeric argument
*/
int set_encryption_key(int f, int n)
{
int status; /* return status */
int odisinp; /* original vlaue of disinp */
ekey_t key ; /* new encryption string */
/* turn command input echo off */
odisinp = disinp;
disinp = FALSE;
/* get the string to use as an encrytion string */
status = mlreply("Encryption String: ", key, sizeof key - 1);
disinp = odisinp;
if (status != TRUE)
return status;
/* save it off and encrypt it*/
strcpy(curbp->b_key, key);
cryptbufferkey( curbp) ;
mloutstr( "") ; /* clear the message line */
return TRUE;
}
static int resetkey(void)
{ /* reset the encryption key if needed */
int s; /* return status */
/* turn off the encryption flag */
is_crypted = FALSE;
/* if we are in crypt mode */
if (curbp->b_mode & MDCRYPT) {
if (curbp->b_key[0] == 0) {
s = set_encryption_key(FALSE, 0);
if (s != TRUE)
return s;
}
/* let others know... */
is_crypted = TRUE;
/* and set up the key to be used! */
/* de-encrypt it */
cryptbufferkey( curbp) ;
/* re-encrypt it...seeding it to start */
cryptbufferkey( curbp) ;
}
return TRUE;
}
#endif
/*
* getfile()
*
* char fname[]; file name to find
* boolean lockfl; check the file for locks?
*/
int getfile( const char *fname, boolean lockfl)
{
struct buffer *bp;
struct line *lp;
int i;
int s;
bname_t bname ; /* buffer name to put file */
#if MSDOS
mklower(fname); /* msdos isn't case sensitive */
#endif
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;
cknewwindow();
mloutstr( "(Old buffer)") ;
return TRUE;
}
}
makename(bname, fname); /* New buffer name. */
while ((bp = bfind(bname, FALSE, 0)) != NULL) {
/* old buffer name conflict code */
s = mlreply("Buffer name: ", bname, sizeof bname);
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) {
mloutstr( "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++;
s = readin(fname, lockfl); /* Read it in. */
cknewwindow();
return s;
}
/*
* 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.
* The command bound to M-FNR is called after the buffer is set up
* and before it is read.
*
* char fname[]; name of file to read
* boolean lockfl; check for file locks?
*/
int readin(const char *fname, boolean lockfl)
{
struct line *lp1;
struct line *lp2;
struct window *wp;
struct buffer *bp;
int s;
eoltype found_eol ;
int nbytes;
int nline;
char *errmsg ;
#if (FILOCK && BSD) || SVR4
if (lockfl && lockchk(fname) == ABORT)
#if PKCODE
{
s = FIOFNF;
bp = curbp;
strcpy(bp->b_fname, "");
goto out;
}
#else
return ABORT;
#endif
#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);
strncpy( bp->b_fname, fname, sizeof( fname_t) - 1) ;
bp->b_fname[ sizeof( fname_t) - 1] = '\0' ;
/* let a user macro get hold of things...if he wants */
execute(META | SPEC | 'R', FALSE, 1);
if ((s = ffropen(fname)) == FIOERR) /* Hard file open. */
goto out;
if (s == FIOFNF) { /* File not found. */
mloutstr( "(New file)") ;
goto out;
}
/* read the file in */
mloutstr( "(Reading file)") ;
nline = 0;
while ((s = ffgetline()) == FIOSUC) {
nbytes = fpayload ;
#if PKCODE
if (nline > MAXNLINE) {
s = FIOMEM;
break;
}
#endif
if ((lp1 = lalloc(nbytes)) == NULL) {
s = FIOMEM; /* 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;
memcpy( lp1->l_text, fline, nbytes) ;
++nline;
}
if( s == FIOERR)
mloutstr( "File read error") ;
switch( ftype) {
case FTYPE_DOS:
found_eol = EOL_DOS ;
curbp->b_mode |= MDDOS ;
break ;
case FTYPE_UNIX:
found_eol = EOL_UNIX ;
break ;
case FTYPE_MAC:
found_eol = EOL_MAC ;
break ;
case FTYPE_NONE:
found_eol = EOL_NONE ;
break ;
default:
found_eol = EOL_MIXED ;
curbp->b_mode |= MDVIEW ; /* force view mode as we have lost
** EOL information */
}
if( fcode == FCODE_UTF_8)
curbp->b_mode |= MDUTF8 ;
if( s == FIOERR) {
errmsg = "I/O ERROR, " ;
curbp->b_flag |= BFTRUNC ;
} else if( s == FIOMEM) {
errmsg = "OUT OF MEMORY, " ;
curbp->b_flag |= BFTRUNC ;
} else
errmsg = "" ;
mloutfmt( "(%sRead %d line%s, code/eol: %s/%s)",
errmsg,
nline,
(nline != 1) ? "s" : "",
codename[ fcode & (FCODE_MASK -1)],
eolname[ found_eol]) ;
ffclose(); /* Ignore errors. */
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 = 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.
*/
void makename( bname_t bname, const char *fname)
{
const char *cp1;
char *cp2;
cp1 = &fname[0];
while (*cp1 != 0)
++cp1;
#if VMS
#if PKCODE
while (cp1 != &fname[0] && cp1[-1] != ':' && cp1[-1] != ']'
&& cp1[-1] != '>')
#else
while (cp1 != &fname[0] && cp1[-1] != ':' && cp1[-1] != ']')
#endif
--cp1;
#endif
#if MSDOS
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[ sizeof( bname_t) - 1] && *cp1 != 0 && *cp1 != ';')
*cp2++ = *cp1++;
*cp2 = 0;
}
/*
* make sure a buffer name is unique
*
* char *name; name to check on
*/
void unqname(char *name)
{
char *sp;
/* check to see if it is in the buffer list */
while (bfind(name, 0, FALSE) != NULL) {
/* go to the end of the name */
sp = name;
while (*sp)
++sp;
if (sp == name || (*(sp - 1) < '0' || *(sp - 1) > '8')) {
*sp++ = '0';
*sp = 0;
} else
*(--sp) += 1;
}
}
/*
* 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".
*/
int filewrite(int f, int n)
{
struct window *wp;
int s;
fname_t fname ;
if (restflag) /* don't allow this command if restricted */
return resterr();
if ((s = mlreply("Write file: ", fname, sizeof fname)) != 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".
*/
int filesave(int f, int n)
{
struct window *wp;
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. */
mloutstr( "No file name") ;
return FALSE;
}
/* complain about truncated files */
if ((curbp->b_flag & BFTRUNC) != 0) {
if (mlyesno("Truncated file ... write it out") == FALSE) {
mloutstr( "(Aborted)") ;
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 struct line; provide
* a macro for this. Most of the grief is error
* checking of some sort.
*/
int writeout( const char *fn)
{
int s;
struct line *lp;
int nline;
#if CRYPT
s = resetkey();
if (s != TRUE)
return s;
#endif
if ((s = ffwopen(fn)) != FIOSUC) { /* Open writes message. */
mloutstr( "Cannot open file for writing") ;
return FALSE;
}
mloutstr( "(Writing...)") ; /* tell us were writing */
lp = lforw(curbp->b_linep); /* First line. */
nline = 0; /* Number of lines. */
while (lp != curbp->b_linep) {
s = ffputline( &lp->l_text[0], llength(lp), curbp->b_mode & MDDOS) ;
if( s != FIOSUC) {
mloutstr( "Write I/O error") ;
break;
}
++nline;
lp = lforw(lp);
}
if (s == FIOSUC) { /* No write error. */
s = ffclose();
if (s == FIOSUC) { /* No close error. */
if (nline == 1)
mloutstr( "(Wrote 1 line)") ;
else
mloutfmt( "(Wrote %d lines)", nline) ;
} else
mloutstr( "Error closing file") ;
} 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.
*/
int filename(int f, int n)
{
struct window *wp;
int s;
fname_t fname ;
if (restflag) /* don't allow this command if restricted */
return resterr();
if ((s = mlreply("Name: ", fname, sizeof fname)) == 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.
*/
static int ifile( const char *fname) {
struct line *lp0;
struct line *lp1;
struct line *lp2;
struct buffer *bp;
int s;
int nbytes;
int nline;
char *errmsg ;
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. */
mloutstr( "(No such file)") ;
return FALSE;
}
mloutstr( "(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;
while ((s = ffgetline()) == FIOSUC) {
nbytes = fpayload ;
if ((lp1 = lalloc(nbytes)) == NULL) {
s = FIOMEM; /* 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;
memcpy( lp1->l_text, fline, nbytes) ;
++nline;
}
ffclose(); /* Ignore errors. */
curwp->w_markp = lforw(curwp->w_markp);
if( s == FIOERR) {
errmsg = "I/O ERROR, " ;
curbp->b_flag |= BFTRUNC ;
} else if( s == FIOMEM) {
errmsg = "OUT OF MEMORY, " ;
curbp->b_flag |= BFTRUNC;
} else
errmsg = "" ;
mloutfmt( "(%sInserted %d line%s)",
errmsg,
nline,
(nline > 1) ? "s" : "") ;
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;
}
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