void Lstream_fungetc (Lstream *stream, int c)
Function equivalents of the above macros.
-int Lstream_read (Lstream *stream, void *data, size_t size)
+ssize_t Lstream_read (Lstream *stream, void *data, size_t size)
Read SIZE bytes of DATA from the stream. Return the number of
bytes read. 0 means EOF. -1 means an error occurred and no
bytes were read.
-int Lstream_write (Lstream *stream, void *data, size_t size)
+ssize_t Lstream_write (Lstream *stream, void *data, size_t size)
Write SIZE bytes of DATA to the stream. Return the number of
bytes written. -1 means an error occurred and no bytes were
written.
int
Lstream_flush_out (Lstream *lstr)
{
- int num_written;
+ ssize_t num_written;
while (lstr->out_buffer_ind > 0)
{
- int size = lstr->out_buffer_ind;
+ size_t size = lstr->out_buffer_ind;
if (! (lstr->flags & LSTREAM_FL_IS_OPEN))
Lstream_internal_error ("lstream not open", lstr);
if (! (lstr->flags & LSTREAM_FL_WRITE))
the attempt to write the data might have resulted in an
EWOULDBLOCK error. */
return 0;
- else if (num_written >= (int) lstr->out_buffer_ind)
+ else if (num_written >= lstr->out_buffer_ind)
lstr->out_buffer_ind = 0;
else if (num_written > 0)
{
if it's getting EWOULDBLOCK errors. We have to keep stocking them
up until they can be written, so as to avoid losing data. */
-static int
+static size_t
Lstream_adding (Lstream *lstr, size_t num, int force)
{
/* Compute the size that the outbuffer needs to be after the
/* Like Lstream_write(), but does not handle line-buffering correctly. */
-static int
+static ssize_t
Lstream_write_1 (Lstream *lstr, CONST void *data, size_t size)
{
CONST unsigned char *p = (CONST unsigned char *) data;
- int off = 0;
+ ssize_t off = 0;
if (! (lstr->flags & LSTREAM_FL_IS_OPEN))
Lstream_internal_error ("lstream not open", lstr);
if (! (lstr->flags & LSTREAM_FL_WRITE))
while (1)
{
/* Figure out how much we can add to the buffer */
- int chunk = Lstream_adding (lstr, size, 0);
+ size_t chunk = Lstream_adding (lstr, size, 0);
if (chunk == 0)
{
if (couldnt_write_last_time)
repeatedly call Lstream_putc(), which knows how to handle
line buffering. */
-int
+ssize_t
Lstream_write (Lstream *lstr, CONST void *data, size_t size)
{
- int i;
+ size_t i;
CONST unsigned char *p = (CONST unsigned char *) data;
if (size == 0)
return size;
if (lstr->buffering != LSTREAM_LINE_BUFFERED)
return Lstream_write_1 (lstr, data, size);
- for (i = 0; i < (int) size; i++)
+ for (i = 0; i < size; i++)
{
if (Lstream_putc (lstr, p[i]) < 0)
break;
int
Lstream_was_blocked_p (Lstream *lstr)
{
- if (lstr->imp->was_blocked_p)
- return (lstr->imp->was_blocked_p) (lstr);
- else
- return 0;
+ return lstr->imp->was_blocked_p ? lstr->imp->was_blocked_p (lstr) : 0;
}
static int
/* Assuming the buffer is empty, fill it up again. */
-static int
+static ssize_t
Lstream_read_more (Lstream *lstr)
{
#if 0
- int size_needed = max (1, min (MAX_READ_SIZE, lstr->buffering_size));
+ ssize_t size_needed = max (1, min (MAX_READ_SIZE, lstr->buffering_size));
#else
/* If someone requested a larger buffer size, so be it! */
- int size_needed = max (1, lstr->buffering_size);
+ ssize_t size_needed = max (1, lstr->buffering_size);
#endif
- int size_gotten;
+ ssize_t size_gotten;
DO_REALLOC (lstr->in_buffer, lstr->in_buffer_size,
size_needed, unsigned char);
return size_gotten < 0 ? -1 : size_gotten;
}
-int
+ssize_t
Lstream_read (Lstream *lstr, void *data, size_t size)
{
unsigned char *p = (unsigned char *) data;
- int off = 0;
+ size_t off = 0;
size_t chunk;
int error_occurred = 0;
if (chunk > 0)
{
/* The bytes come back in reverse order. */
- for (; off < (int) chunk; off++)
+ for (; off < chunk; off++)
p[off] = lstr->unget_buffer[--lstr->unget_buffer_ind];
lstr->byte_count += chunk;
size -= chunk;
/* If we need some more, try to get some more from the stream's end */
if (size > 0)
{
- int retval = Lstream_read_more (lstr);
+ ssize_t retval = Lstream_read_more (lstr);
if (retval < 0)
error_occurred = 1;
if (retval <= 0)
VALIDATE_CHARPTR_BACKWARD (dataend);
if (dataend + REP_BYTES_BY_FIRST_BYTE (*dataend) != p + off)
{
- int newoff = dataend - p;
+ size_t newoff = dataend - p;
/* If not, chop the size down to ignore the last char
and stash it away for next time. */
Lstream_unread (lstr, dataend, off - newoff);
}
}
- return ((off == 0 && error_occurred) ? -1 : off);
+ return off == 0 && error_occurred ? -1 : (ssize_t) off;
}
void
Lstream_unread (Lstream *lstr, CONST void *data, size_t size)
{
- int i;
- unsigned char *p = (unsigned char *) data;
+ CONST unsigned char *p = (CONST unsigned char *) data;
/* Make sure buffer is big enough */
-
DO_REALLOC (lstr->unget_buffer, lstr->unget_buffer_size,
lstr->unget_buffer_ind + size, unsigned char);
+ lstr->byte_count -= size;
+
/* Bytes have to go on in reverse order -- they are reversed
again when read back. */
- for (i = size - 1; i >= 0; i--)
- lstr->unget_buffer[lstr->unget_buffer_ind++] = p[i];
- lstr->byte_count -= size;
+ while (size--)
+ lstr->unget_buffer[lstr->unget_buffer_ind++] = p[size];
}
int
static int
Lstream_pseudo_close (Lstream *lstr)
{
- int rc;
-
if (!lstr->flags & LSTREAM_FL_IS_OPEN)
Lstream_internal_error ("lstream is not open", lstr);
/* don't check errors here -- best not to risk file descriptor loss */
- rc = Lstream_flush (lstr);
-
- return rc;
+ return Lstream_flush (lstr);
}
int
Lstream_fputc (Lstream *lstr, int c)
{
unsigned char ch = (unsigned char) c;
- int retval = Lstream_write_1 (lstr, &ch, 1);
+ ssize_t retval = Lstream_write_1 (lstr, &ch, 1);
if (retval >= 0 && lstr->buffering == LSTREAM_LINE_BUFFERED && ch == '\n')
return Lstream_flush_out (lstr);
return retval < 0 ? -1 : 0;
return make_stdio_stream_1 (stream, flags, "w");
}
-static int
+/* #### From reading the Unix 98 specification, it appears that if we
+ want stdio_reader() to be completely correct, we should check for
+ 0 < val < size and if so, check to see if an error has occurred.
+ If an error has occurred, but val is non-zero, we should go ahead
+ and act as if the read was successful, but remember in some fashion
+ or other, that an error has occurred, and report that on the next
+ call to stdio_reader instead of calling fread() again.
+
+ Currently, in such a case, we end up calling fread() twice and we
+ assume that
+
+ 1) this is not harmful, and
+ 2) the error will still be reported on the second read.
+
+ This is probably reasonable, so I don't think we should change this
+ code (it could even be argued that the error might have fixed
+ itself, so we should do the fread() again. */
+
+static ssize_t
stdio_reader (Lstream *stream, unsigned char *data, size_t size)
{
struct stdio_stream *str = STDIO_STREAM_DATA (stream);
- size_t val = fread (data, 1, (size_t) size, str->file);
+ size_t val = fread (data, 1, size, str->file);
if (!val && ferror (str->file))
return -1;
- return (int) val;
+ return val;
}
-static int
+static ssize_t
stdio_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct stdio_stream *str = STDIO_STREAM_DATA (stream);
size_t val = fwrite (data, 1, size, str->file);
if (!val && ferror (str->file))
return -1;
- return (int) val;
+ return val;
}
static int
if (stream->flags & LSTREAM_FL_WRITE)
return fflush (str->file);
else
- /* call fpurge? Only exists on some systems. #### Why not add a
- configure check for HAVE_FPURGE and utilize it on systems that
- support it? --hniksic */
return 0;
}
if (stream->flags & LSTREAM_FL_WRITE)
return fflush (str->file);
else
- /* call fpurge? Only exists on some systems. */
return 0;
}
return make_filedesc_stream_1 (filedesc, offset, count, flags, "w");
}
-static int
+static ssize_t
filedesc_reader (Lstream *stream, unsigned char *data, size_t size)
{
- int nread;
+ ssize_t nread;
struct filedesc_stream *str = FILEDESC_STREAM_DATA (stream);
if (str->end_pos >= 0)
size = min (size, (size_t) (str->end_pos - str->current_pos));
return 0;
}
-static int
+static ssize_t
filedesc_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct filedesc_stream *str = FILEDESC_STREAM_DATA (stream);
- int retval;
+ ssize_t retval;
int need_newline = 0;
/* This function would be simple if it were not for the blasted
out for EWOULDBLOCK. */
if (str->chars_sans_newline >= str->pty_max_bytes)
{
- int retval2 = ((str->allow_quit ? write_allowing_quit : write)
- (str->fd, &str->eof_char, 1));
+ ssize_t retval2 = ((str->allow_quit ? write_allowing_quit : write)
+ (str->fd, &str->eof_char, 1));
if (retval2 > 0)
str->chars_sans_newline = 0;
else if (retval2 < 0)
if (need_newline)
{
Bufbyte nl = '\n';
- int retval2 = ((str->allow_quit ? write_allowing_quit : write)
- (str->fd, &nl, 1));
+ ssize_t retval2 = ((str->allow_quit ? write_allowing_quit : write)
+ (str->fd, &nl, 1));
if (retval2 > 0)
{
str->chars_sans_newline = 0;
return obj;
}
-static int
+static ssize_t
lisp_string_reader (Lstream *stream, unsigned char *data, size_t size)
{
struct lisp_string_stream *str = LISP_STRING_STREAM_DATA (stream);
return obj;
}
-static int
+static ssize_t
fixed_buffer_reader (Lstream *stream, unsigned char *data, size_t size)
{
struct fixed_buffer_stream *str = FIXED_BUFFER_STREAM_DATA (stream);
return size;
}
-static int
+static ssize_t
fixed_buffer_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct fixed_buffer_stream *str = FIXED_BUFFER_STREAM_DATA (stream);
return obj;
}
-static int
+static ssize_t
resizing_buffer_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct resizing_buffer_stream *str = RESIZING_BUFFER_STREAM_DATA (stream);
return obj;
}
-static int
+static ssize_t
dynarr_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct dynarr_stream *str = DYNARR_STREAM_DATA (stream);
return lstr;
}
-static int
+static ssize_t
lisp_buffer_reader (Lstream *stream, unsigned char *data, size_t size)
{
struct lisp_buffer_stream *str = LISP_BUFFER_STREAM_DATA (stream);
return data - orig_data;
}
-static int
+static ssize_t
lisp_buffer_writer (Lstream *stream, CONST unsigned char *data, size_t size)
{
struct lisp_buffer_stream *str = LISP_BUFFER_STREAM_DATA (stream);
projects / chise / xemacs-chise.git.1 / blobdiff