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nuttx-apps/interpreters/bas/fs.c
Gregory Nutt 95213afeb5 Recovering from GIT chaos
2014-11-06 13:35:15 -06:00

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/****************************************************************************
* apps/interpreters/bas/fs.c
* BASIC file system interface.
*
* Copyright (c) 1999-2014 Michael Haardt
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Adapted to NuttX and re-released under a 3-clause BSD license:
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Authors: Alan Carvalho de Assis <Alan Carvalho de Assis>
* Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/time.h>
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include "fs.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define LINEWIDTH 80
#define COLWIDTH 14
#define _(String) String
/****************************************************************************
* Private Data
****************************************************************************/
static struct FileStream **file;
static int capacity;
static int used;
static const int open_mode[4] = { 0, O_RDONLY, O_WRONLY, O_RDWR };
const char *FS_errmsg;
static char FS_errmsgbuf[80];
/****************************************************************************
* Private Functions
****************************************************************************/
static int size(int dev)
{
if (dev >= capacity)
{
int i;
struct FileStream **n;
n = (struct FileStream **)
realloc(file, (dev + 1) * sizeof(struct FileStream *));
if (n == (struct FileStream **)0)
{
FS_errmsg = strerror(errno);
return -1;
}
file = n;
for (i = capacity; i <= dev; ++i)
{
file[i] = (struct FileStream *)0;
}
capacity = dev + 1;
}
return 0;
}
static int opened(int dev, int mode)
{
int fd = -1;
if (dev < 0 || dev >= capacity || file[dev] == (struct FileStream *)0)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf), _("channel #%d not open"),
dev);
FS_errmsg = FS_errmsgbuf;
return -1;
}
if (mode == -1)
{
return 0;
}
switch (mode)
{
case 0:
{
fd = file[dev]->outfd;
if (fd == -1)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf),
_("channel #%d not opened for writing"), dev);
}
break;
}
case 1:
{
fd = file[dev]->infd;
if (fd == -1)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf),
_("channel #%d not opened for reading"), dev);
}
break;
}
case 2:
{
fd = file[dev]->randomfd;
if (fd == -1)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf),
_("channel #%d not opened for random access"), dev);
}
break;
}
case 3:
{
fd = file[dev]->binaryfd;
if (fd == -1)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf),
_("channel #%d not opened for binary access"), dev);
}
break;
}
case 4:
{
fd =
(file[dev]->randomfd !=
-1 ? file[dev]->randomfd : file[dev]->binaryfd);
if (fd == -1)
{
snprintf(FS_errmsgbuf, sizeof(FS_errmsgbuf),
_("channel #%d not opened for random or binary access"),
dev);
}
break;
}
default:
assert(0);
}
if (fd == -1)
{
FS_errmsg = FS_errmsgbuf;
return -1;
}
else
{
return 0;
}
}
static int refill(int dev)
{
struct FileStream *f;
ssize_t len;
f = file[dev];
f->inSize = 0;
len = read(f->infd, f->inBuf, sizeof(f->inBuf));
if (len <= 0)
{
f->inCapacity = 0;
FS_errmsg = (len == -1 ? strerror(errno) : (const char *)0);
return -1;
}
else
{
f->inCapacity = len;
return 0;
}
}
static int edit(int chn, int onl)
{
struct FileStream *f = file[chn];
char *buf = f->inBuf;
char ch;
int r;
for (buf = f->inBuf; buf < (f->inBuf + f->inCapacity); ++buf)
{
if (*buf >= '\0' && *buf < ' ')
{
FS_putChar(chn, '^');
FS_putChar(chn, *buf ? (*buf + 'a' - 1) : '@');
}
else
{
FS_putChar(chn, *buf);
}
}
do
{
FS_flush(chn);
if ((r = read(f->infd, &ch, 1)) == -1)
{
f->inCapacity = 0;
FS_errmsg = strerror(errno);
return -1;
}
else if (r == 0 || (f->inCapacity == 0 && ch == 4))
{
FS_errmsg = (char *)0;
return -1;
}
#ifdef CONFIG_INTERPREPTER_BAS_VT100
/* REVISIT: Use VT100 commands to erase */
#warning Missing Logic
#else
if ((f->inCapacity + 1) < sizeof(f->inBuf))
{
/* Ignore carriage returns that may accompany a CRLF sequence.
* REVISIT: Some environments may have other line termination rules
*/
if (ch != '\r')
{
/* Is this a new line character */
if (ch != '\n')
{
/* No.. escape control characters other than newline and
* carriage return
*/
if (ch >= '\0' && ch < ' ')
{
FS_putChar(chn, '^');
FS_putChar(chn, ch ? (ch + 'a' - 1) : '@');
}
/* Output normal, printable characters */
else
{
FS_putChar(chn, ch);
}
}
/* Echo the newline (or not) */
else if (onl)
{
FS_putChar(chn, '\n');
}
f->inBuf[f->inCapacity++] = ch;
}
}
#endif
}
while (ch != '\n');
return 0;
}
static int cls(int chn)
{
#ifdef CONFIG_INTERPREPTER_BAS_VT100
/* REVISIT: Use VT100 commands to clear the screen */
#warning Missing Logic
#endif
FS_errmsg = _("Clear screen operation not implemented");
return -1;
}
static int locate(int chn, int line, int column)
{
#ifdef CONFIG_INTERPREPTER_BAS_VT100
/* REVISIT: Use VT100 commands to set the cursor position */
#warning Missing Logic
#endif
FS_errmsg = _("Set cursor position operation not implement");
return -1;
}
static int colour(int chn, int foreground, int background)
{
#ifdef CONFIG_INTERPREPTER_BAS_VT100
/* REVISIT: Use VT100 commands to color */
#warning Missing Logic
#endif
FS_errmsg = _("Set color operation no implemented");
return -1;
}
static int resetcolour(int chn)
{
#ifdef CONFIG_INTERPREPTER_BAS_VT100
/* REVISIT: Use VT100 commands to reset color */
#warning Missing Logic
#endif
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int FS_opendev(int chn, int infd, int outfd)
{
if (size(chn) == -1)
{
return -1;
}
if (file[chn] != (struct FileStream *)0)
{
FS_errmsg = _("channel already open");
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->dev = 1;
#ifdef CONFIG_SERIAL_TERMIOS
file[chn]->tty = (infd == 0 ? isatty(infd) && isatty(outfd) : 0);
#else
file[chn]->tty = 1;
#endif
file[chn]->recLength = 1;
file[chn]->infd = infd;
file[chn]->inSize = 0;
file[chn]->inCapacity = 0;
file[chn]->outfd = outfd;
file[chn]->outPos = 0;
file[chn]->outLineWidth = LINEWIDTH;
file[chn]->outColWidth = COLWIDTH;
file[chn]->outCapacity = sizeof(file[chn]->outBuf);
file[chn]->outSize = 0;
file[chn]->outforeground = -1;
file[chn]->outbackground = -1;
file[chn]->randomfd = -1;
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return 0;
}
int FS_openin(const char *name)
{
int chn, fd;
if ((fd = open(name, O_RDONLY)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
for (chn = 0; chn < capacity; ++chn)
{
if (file[chn] == (struct FileStream *)0)
{
break;
}
}
if (size(chn) == -1)
{
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = 1;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = fd;
file[chn]->inSize = 0;
file[chn]->inCapacity = 0;
file[chn]->outfd = -1;
file[chn]->randomfd = -1;
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_openinChn(int chn, const char *name, int mode)
{
int fd;
mode_t fl;
if (size(chn) == -1)
{
return -1;
}
if (file[chn] != (struct FileStream *)0)
{
FS_errmsg = _("channel already open");
return -1;
}
fl = open_mode[mode];
/* Serial devices on Linux should be opened non-blocking, otherwise the
* open() may block already. Named pipes can not be opened non-blocking in
* write-only mode, so first try non-blocking, then blocking. */
if ((fd = open(name, fl | O_NONBLOCK)) == -1)
{
if (errno != ENXIO || (fd = open(name, fl)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
}
else if (fcntl(fd, F_SETFL, (long)fl) == -1)
{
FS_errmsg = strerror(errno);
close(fd);
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = 1;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = fd;
file[chn]->inSize = 0;
file[chn]->inCapacity = 0;
file[chn]->outfd = -1;
file[chn]->randomfd = -1;
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_openout(const char *name)
{
int chn, fd;
if ((fd = open(name, O_WRONLY | O_TRUNC | O_CREAT, 0666)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
for (chn = 0; chn < capacity; ++chn)
{
if (file[chn] == (struct FileStream *)0)
{
break;
}
}
if (size(chn) == -1)
{
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = 1;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = -1;
file[chn]->outfd = fd;
file[chn]->outPos = 0;
file[chn]->outLineWidth = LINEWIDTH;
file[chn]->outColWidth = COLWIDTH;
file[chn]->outSize = 0;
file[chn]->outCapacity = sizeof(file[chn]->outBuf);
file[chn]->randomfd = -1;
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_openoutChn(int chn, const char *name, int mode, int append)
{
int fd;
mode_t fl;
if (size(chn) == -1)
{
return -1;
}
if (file[chn] != (struct FileStream *)0)
{
FS_errmsg = _("channel already open");
return -1;
}
fl = open_mode[mode] | (append ? O_APPEND : 0);
/* Serial devices on Linux should be opened non-blocking, otherwise the */
/* open() may block already. Named pipes can not be opened non-blocking */
/* in write-only mode, so first try non-blocking, then blocking. */
fd = open(name, fl | O_CREAT | (append ? 0 : O_TRUNC) | O_NONBLOCK, 0666);
if (fd == -1)
{
if (errno != ENXIO ||
(fd = open(name, fl | O_CREAT | (append ? 0 : O_TRUNC), 0666)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
}
else if (fcntl(fd, F_SETFL, (long)fl) == -1)
{
FS_errmsg = strerror(errno);
close(fd);
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = 1;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = -1;
file[chn]->outfd = fd;
file[chn]->outPos = 0;
file[chn]->outLineWidth = LINEWIDTH;
file[chn]->outColWidth = COLWIDTH;
file[chn]->outSize = 0;
file[chn]->outCapacity = sizeof(file[chn]->outBuf);
file[chn]->randomfd = -1;
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_openrandomChn(int chn, const char *name, int mode, int recLength)
{
int fd;
assert(chn >= 0);
assert(name != (const char *)0);
assert(recLength > 0);
if (size(chn) == -1)
{
return -1;
}
if (file[chn] != (struct FileStream *)0)
{
FS_errmsg = _("channel already open");
return -1;
}
if ((fd = open(name, open_mode[mode] | O_CREAT, 0666)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = recLength;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = -1;
file[chn]->outfd = -1;
file[chn]->randomfd = fd;
file[chn]->recBuf = malloc(recLength);
memset(file[chn]->recBuf, 0, recLength);
StringField_new(&file[chn]->field);
file[chn]->binaryfd = -1;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_openbinaryChn(int chn, const char *name, int mode)
{
int fd;
assert(chn >= 0);
assert(name != (const char *)0);
if (size(chn) == -1)
{
return -1;
}
if (file[chn] != (struct FileStream *)0)
{
FS_errmsg = _("channel already open");
return -1;
}
if ((fd = open(name, open_mode[mode] | O_CREAT, 0666)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
file[chn] = malloc(sizeof(struct FileStream));
file[chn]->recLength = 1;
file[chn]->dev = 0;
file[chn]->tty = 0;
file[chn]->infd = -1;
file[chn]->outfd = -1;
file[chn]->randomfd = -1;
file[chn]->binaryfd = fd;
FS_errmsg = (const char *)0;
++used;
return chn;
}
int FS_freechn(void)
{
int i;
for (i = 0; i < capacity && file[i]; ++i);
if (size(i) == -1)
{
return -1;
}
return i;
}
int FS_flush(int dev)
{
ssize_t written;
size_t offset;
if (file[dev] == (struct FileStream *)0)
{
FS_errmsg = _("channel not open");
return -1;
}
offset = 0;
while (offset < file[dev]->outSize)
{
written =
write(file[dev]->outfd, file[dev]->outBuf + offset,
file[dev]->outSize - offset);
if (written == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
else
{
offset += written;
}
}
file[dev]->outSize = 0;
FS_errmsg = (const char *)0;
return 0;
}
int FS_close(int dev)
{
if (file[dev] == (struct FileStream *)0)
{
FS_errmsg = _("channel not open");
return -1;
}
if (file[dev]->outfd >= 0)
{
if (file[dev]->tty &&
(file[dev]->outforeground != -1 || file[dev]->outbackground != -1))
{
resetcolour(dev);
}
FS_flush(dev);
close(file[dev]->outfd);
}
if (file[dev]->randomfd >= 0)
{
StringField_destroy(&file[dev]->field);
free(file[dev]->recBuf);
close(file[dev]->randomfd);
}
if (file[dev]->binaryfd >= 0)
{
close(file[dev]->binaryfd);
}
if (file[dev]->infd >= 0)
{
close(file[dev]->infd);
}
free(file[dev]);
file[dev] = (struct FileStream *)0;
FS_errmsg = (const char *)0;
if (--used == 0)
{
free(file);
capacity = 0;
}
return 0;
}
#ifdef CONFIG_SERIAL_TERMIOS
int FS_istty(int chn)
{
return (file[chn] && file[chn]->tty);
}
#endif
int FS_lock(int chn, off_t offset, off_t length, int mode, int w)
{
int fd;
struct flock recordLock;
if (file[chn] == (struct FileStream *)0)
{
FS_errmsg = _("channel not open");
return -1;
}
if ((fd = file[chn]->infd) == -1)
{
if ((fd = file[chn]->outfd) == -1)
{
if ((fd = file[chn]->randomfd) == -1)
{
if ((fd = file[chn]->binaryfd) == -1)
assert(0);
}
}
}
recordLock.l_whence = SEEK_SET;
recordLock.l_start = offset;
recordLock.l_len = length;
switch (mode)
{
case FS_LOCK_SHARED:
recordLock.l_type = F_RDLCK;
break;
case FS_LOCK_EXCLUSIVE:
recordLock.l_type = F_WRLCK;
break;
case FS_LOCK_NONE:
recordLock.l_type = F_UNLCK;
break;
default:
assert(0);
}
if (fcntl(fd, w ? F_SETLKW : F_SETLK, &recordLock) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
}
int FS_truncate(int chn)
{
#ifdef CONFIG_INTERPRETER_BAS_HAVE_FTRUNCATE
int fd;
off_t o;
if (file[chn] == (struct FileStream *)0)
{
FS_errmsg = _("channel not open");
return -1;
}
if ((fd = file[chn]->infd) == -1)
{
if ((fd = file[chn]->outfd) == -1)
{
if ((fd = file[chn]->randomfd) == -1)
{
if ((fd = file[chn]->binaryfd) == -1)
{
assert(0);
}
}
}
}
if ((o = lseek(fd, 0, SEEK_CUR)) == (off_t) - 1 || ftruncate(fd, o + 1) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
#else
FS_errmsg = strerror(ENOSYS);
return -1;
#endif
}
void FS_shellmode(int dev)
{
}
void FS_fsmode(int chn)
{
}
void FS_xonxoff(int chn, int on)
{
/* Not implemented */
}
int FS_put(int chn)
{
ssize_t offset, written;
if (opened(chn, 2) == -1)
{
return -1;
}
offset = 0;
while (offset < file[chn]->recLength)
{
written =
write(file[chn]->randomfd, file[chn]->recBuf + offset,
file[chn]->recLength - offset);
if (written == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
else
{
offset += written;
}
}
FS_errmsg = (const char *)0;
return 0;
}
int FS_putChar(int dev, char ch)
{
struct FileStream *f;
if (opened(dev, 0) == -1)
{
return -1;
}
f = file[dev];
if (ch == '\n')
{
f->outPos = 0;
}
if (ch == '\b' && f->outPos)
{
--f->outPos;
}
if (f->outSize + 2 >= f->outCapacity && FS_flush(dev) == -1)
{
return -1;
}
if (f->outLineWidth && f->outPos == f->outLineWidth)
{
f->outBuf[f->outSize++] = '\n';
f->outPos = 0;
}
f->outBuf[f->outSize++] = ch;
if (ch != '\n' && ch != '\b')
{
++f->outPos;
}
FS_errmsg = (const char *)0;
return 0;
}
int FS_putChars(int dev, const char *chars)
{
while (*chars)
{
if (FS_putChar(dev, *chars++) == -1)
{
return -1;
}
}
return 0;
}
int FS_putString(int dev, const struct String *s)
{
size_t len = s->length;
const char *c = s->character;
while (len)
{
if (FS_putChar(dev, *c++) == -1)
{
return -1;
}
else
{
--len;
}
}
return 0;
}
int FS_putItem(int dev, const struct String *s)
{
struct FileStream *f;
if (opened(dev, 0) == -1)
{
return -1;
}
f = file[dev];
if (f->outPos && f->outPos + s->length > f->outLineWidth)
{
FS_nextline(dev);
}
return FS_putString(dev, s);
}
int FS_putbinaryString(int chn, const struct String *s)
{
if (opened(chn, 3) == -1)
{
return -1;
}
if (s->length &&
write(file[chn]->binaryfd, s->character, s->length) != s->length)
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
}
int FS_putbinaryInteger(int chn, long int x)
{
char s[sizeof(long int)];
int i;
if (opened(chn, 3) == -1)
{
return -1;
}
for (i = 0; i < sizeof(x); ++i, x >>= 8)
{
s[i] = (x & 0xff);
}
if (write(file[chn]->binaryfd, s, sizeof(s)) != sizeof(s))
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
}
int FS_putbinaryReal(int chn, double x)
{
if (opened(chn, 3) == -1)
{
return -1;
}
if (write(file[chn]->binaryfd, &x, sizeof(x)) != sizeof(x))
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
}
int FS_getbinaryString(int chn, struct String *s)
{
ssize_t len;
if (opened(chn, 3) == -1)
{
return -1;
}
if (s->length &&
(len = read(file[chn]->binaryfd, s->character, s->length)) != s->length)
{
if (len == -1)
{
FS_errmsg = strerror(errno);
}
else
{
FS_errmsg = _("End of file");
}
return -1;
}
return 0;
}
int FS_getbinaryInteger(int chn, long int *x)
{
char s[sizeof(long int)];
int i;
ssize_t len;
if (opened(chn, 3) == -1)
{
return -1;
}
if ((len = read(file[chn]->binaryfd, s, sizeof(s))) != sizeof(s))
{
if (len == -1)
{
FS_errmsg = strerror(errno);
}
else
{
FS_errmsg = _("End of file");
}
return -1;
}
*x = (s[sizeof(x) - 1] < 0) ? -1 : 0;
for (i = sizeof(s) - 1; i >= 0; --i)
{
*x = (*x << 8) | (s[i] & 0xff);
}
return 0;
}
int FS_getbinaryReal(int chn, double *x)
{
ssize_t len;
if (opened(chn, 3) == -1)
{
return -1;
}
if ((len = read(file[chn]->binaryfd, x, sizeof(*x))) != sizeof(*x))
{
if (len == -1)
{
FS_errmsg = strerror(errno);
}
else
{
FS_errmsg = _("End of file");
}
return -1;
}
return 0;
}
int FS_nextcol(int dev)
{
struct FileStream *f;
if (opened(dev, 0) == -1)
{
return -1;
}
f = file[dev];
if (f->outPos % f->outColWidth
&& f->outLineWidth
&& ((f->outPos / f->outColWidth + 2) * f->outColWidth) > f->outLineWidth)
{
return FS_putChar(dev, '\n');
}
if (!(f->outPos % f->outColWidth) && FS_putChar(dev, ' ') == -1)
{
return -1;
}
while (f->outPos % f->outColWidth)
{
if (FS_putChar(dev, ' ') == -1)
{
return -1;
}
}
return 0;
}
int FS_nextline(int dev)
{
struct FileStream *f;
if (opened(dev, 0) == -1)
{
return -1;
}
f = file[dev];
if (f->outPos && FS_putChar(dev, '\n') == -1)
{
return -1;
}
return 0;
}
int FS_tab(int dev, int position)
{
struct FileStream *f = file[dev];
if (f->outLineWidth && position >= f->outLineWidth)
{
position = f->outLineWidth - 1;
}
while (f->outPos < (position - 1))
{
if (FS_putChar(dev, ' ') == -1)
{
return -1;
}
}
return 0;
}
int FS_width(int dev, int width)
{
if (opened(dev, 0) == -1)
{
return -1;
}
if (width < 0)
{
FS_errmsg = _("negative width");
return -1;
}
file[dev]->outLineWidth = width;
return 0;
}
int FS_zone(int dev, int zone)
{
if (opened(dev, 0) == -1)
{
return -1;
}
if (zone <= 0)
{
FS_errmsg = _("non-positive zone width");
return -1;
}
file[dev]->outColWidth = zone;
return 0;
}
int FS_cls(int chn)
{
struct FileStream *f;
if (opened(chn, 0) == -1)
{
return -1;
}
f = file[chn];
if (!f->tty)
{
FS_errmsg = _("not a terminal");
return -1;
}
if (cls(chn) == -1)
{
return -1;
}
if (FS_flush(chn) == -1)
{
return -1;
}
f->outPos = 0;
return 0;
}
int FS_locate(int chn, int line, int column)
{
struct FileStream *f;
if (opened(chn, 0) == -1)
{
return -1;
}
f = file[chn];
if (!f->tty)
{
FS_errmsg = _("not a terminal");
return -1;
}
if (locate(chn, line, column) == -1)
{
return -1;
}
if (FS_flush(chn) == -1)
{
return -1;
}
f->outPos = column - 1;
return 0;
}
int FS_colour(int chn, int foreground, int background)
{
struct FileStream *f;
if (opened(chn, 0) == -1)
{
return -1;
}
f = file[chn];
if (!f->tty)
{
FS_errmsg = _("not a terminal");
return -1;
}
if (colour(chn, foreground, background) == -1)
{
return -1;
}
f->outforeground = foreground;
f->outbackground = background;
return 0;
}
int FS_getChar(int dev)
{
struct FileStream *f;
if (opened(dev, 1) == -1)
{
return -1;
}
f = file[dev];
if (f->inSize == f->inCapacity && refill(dev) == -1)
{
return -1;
}
FS_errmsg = (const char *)0;
if (f->inSize + 1 == f->inCapacity)
{
char ch = f->inBuf[f->inSize];
f->inSize = f->inCapacity = 0;
return ch;
}
else
{
return f->inBuf[f->inSize++];
}
}
int FS_get(int chn)
{
ssize_t offset, rd;
if (opened(chn, 2) == -1)
{
return -1;
}
offset = 0;
while (offset < file[chn]->recLength)
{
rd =
read(file[chn]->randomfd, file[chn]->recBuf + offset,
file[chn]->recLength - offset);
if (rd == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
else
{
offset += rd;
}
}
FS_errmsg = (const char *)0;
return 0;
}
int FS_inkeyChar(int dev, int ms)
{
struct FileStream *f;
char c;
ssize_t len;
#ifdef CONFIG_INTERPRETER_BAS_USE_SELECT
fd_set just_infd;
struct timeval timeout;
#endif
if (opened(dev, 1) == -1)
{
return -1;
}
f = file[dev];
if (f->inSize < f->inCapacity)
{
return f->inBuf[f->inSize++];
}
#ifdef CONFIG_INTERPRETER_BAS_USE_SELECT
FD_ZERO(&just_infd);
FD_SET(f->infd, &just_infd);
timeout.tv_sec = ms / 1000;
timeout.tv_usec = (ms % 1000) * 1000;
switch (select(f->infd + 1, &just_infd, (fd_set *) 0, (fd_set *) 0, &timeout))
{
case 1:
{
FS_errmsg = (const char *)0;
len = read(f->infd, &c, 1);
return (len == 1 ? c : -1);
}
case 0:
{
FS_errmsg = (const char *)0;
return -1;
}
case -1:
{
FS_errmsg = strerror(errno);
return -1;
}
default:
assert(0);
}
return 0;
#else
FS_errmsg = (const char *)0;
len = read(f->infd, &c, 1);
if (len == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
return (len == 1 ? c : -1);
#endif
}
void FS_sleep(double s)
{
struct timespec p;
p.tv_sec = floor(s);
p.tv_nsec = 1000000000 * (s - floor(s));
nanosleep(&p, (struct timespec *)0);
}
int FS_eof(int chn)
{
struct FileStream *f;
if (opened(chn, 1) == -1)
{
return -1;
}
f = file[chn];
if (f->inSize == f->inCapacity && refill(chn) == -1)
{
return 1;
}
return 0;
}
long int FS_loc(int chn)
{
int fd;
off_t cur, offset = 0;
if (opened(chn, -1) == -1)
{
return -1;
}
if (file[chn]->infd != -1)
{
fd = file[chn]->infd;
offset = -file[chn]->inCapacity + file[chn]->inSize;
}
else if (file[chn]->outfd != -1)
{
fd = file[chn]->outfd;
offset = file[chn]->outSize;
}
else if (file[chn]->randomfd != -1)
{
fd = file[chn]->randomfd;
}
else
{
fd = file[chn]->binaryfd;
}
assert(fd != -1);
if ((cur = lseek(fd, 0, SEEK_CUR)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
return (cur + offset) / file[chn]->recLength;
}
long int FS_lof(int chn)
{
off_t curpos;
off_t endpos;
int fd;
if (opened(chn, -1) == -1)
{
return -1;
}
if (file[chn]->infd != -1)
{
fd = file[chn]->infd;
}
else if (file[chn]->outfd != -1)
{
fd = file[chn]->outfd;
}
else if (file[chn]->randomfd != -1)
{
fd = file[chn]->randomfd;
}
else
{
fd = file[chn]->binaryfd;
}
assert(fd != -1);
/* Get the size of the file */
/* Save the current file position */
curpos = lseek(fd, 0, SEEK_CUR);
if (curpos == (off_t)-1)
{
FS_errmsg = strerror(errno);
return -1;
}
/* Get the position at the end of the file */
endpos = lseek(fd, 0, SEEK_END);
if (endpos == (off_t)-1)
{
FS_errmsg = strerror(errno);
return -1;
}
/* Restore the file position */
curpos = lseek(fd, curpos, SEEK_SET);
if (curpos == (off_t)-1)
{
FS_errmsg = strerror(errno);
return -1;
}
return (long int)(endpos / file[chn]->recLength);
}
long int FS_recLength(int chn)
{
if (opened(chn, 2) == -1)
{
return -1;
}
return file[chn]->recLength;
}
void FS_field(int chn, struct String *s, long int position, long int length)
{
assert(file[chn]);
String_joinField(s, &file[chn]->field, file[chn]->recBuf + position, length);
}
int FS_seek(int chn, long int record)
{
if (opened(chn, 2) != -1)
{
if (lseek
(file[chn]->randomfd, (off_t) record * file[chn]->recLength,
SEEK_SET) != -1)
{
return 0;
}
FS_errmsg = strerror(errno);
}
else if (opened(chn, 4) != -1)
{
if (lseek(file[chn]->binaryfd, (off_t) record, SEEK_SET) != -1)
{
return 0;
}
FS_errmsg = strerror(errno);
}
return -1;
}
int FS_appendToString(int chn, struct String *s, int onl)
{
size_t new;
char *n;
struct FileStream *f = file[chn];
int c;
if (f->tty && f->inSize == f->inCapacity)
{
if (edit(chn, onl) == -1)
{
return (FS_errmsg ? -1 : 0);
}
}
do
{
n = f->inBuf + f->inSize;
while (1)
{
if (n == f->inBuf + f->inCapacity)
{
break;
}
c = *n++;
if (c == '\n')
{
break;
}
}
new = n - (f->inBuf + f->inSize);
if (new)
{
size_t offset = s->length;
if (String_size(s, offset + new) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
memcpy(s->character + offset, f->inBuf + f->inSize, new);
f->inSize += new;
if (*(n - 1) == '\n')
{
if (f->inSize == f->inCapacity)
{
f->inSize = f->inCapacity = 0;
}
return 0;
}
}
if ((c = FS_getChar(chn)) >= 0)
{
String_appendChar(s, c);
}
if (c == '\n')
{
if (s->length >= 2 && s->character[s->length - 2] == '\r')
{
s->character[s->length - 2] = '\n';
--s->length;
}
return 0;
}
}
while (c != -1);
return (FS_errmsg ? -1 : 0);
}
void FS_closefiles(void)
{
int i;
for (i = 0; i < capacity; ++i)
{
if (file[i] && !file[i]->dev)
{
FS_close(i);
}
}
}
int FS_charpos(int chn)
{
if (file[chn] == (struct FileStream *)0)
{
FS_errmsg = _("channel not open");
return -1;
}
return (file[chn]->outPos);
}
int FS_copy(const char *from, const char *to)
{
int infd, outfd;
char buf[4096];
ssize_t inlen, outlen = -1;
if ((infd = open(from, O_RDONLY)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
if ((outfd = open(to, O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
while ((inlen = read(infd, &buf, sizeof(buf))) > 0)
{
ssize_t off = 0;
while (inlen && (outlen = write(outfd, &buf + off, inlen)) > 0)
{
off += outlen;
inlen -= outlen;
}
if (outlen == -1)
{
FS_errmsg = strerror(errno);
close(infd);
close(outfd);
return -1;
}
}
if (inlen == -1)
{
FS_errmsg = strerror(errno);
close(infd);
close(outfd);
return -1;
}
if (close(infd) == -1)
{
FS_errmsg = strerror(errno);
close(outfd);
return -1;
}
if (close(outfd) == -1)
{
FS_errmsg = strerror(errno);
return -1;
}
return 0;
}
int FS_portInput(int address)
{
FS_errmsg = _("Direct port access not available");
return -1;
}
int FS_memInput(int address)
{
FS_errmsg = _("Direct memory access not available");
return -1;
}
int FS_portOutput(int address, int value)
{
FS_errmsg = _("Direct port access not available");
return -1;
}
int FS_memOutput(int address, int value)
{
FS_errmsg = _("Direct memory access not available");
return -1;
}
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