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/* Guile-pg - A Guile interface to PostgreSQL
Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Author: Ian Grant <Ian.Grant@cl.cam.ac.uk> */
#include <config.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <libguile.h>
#include <guile/gh.h>
#include <libpq-fe.h>
#include <libpq/libpq-fs.h>
#include "libpostgres.h"
#define sec_p guile_pg_sec_p
#define sec_unbox guile_pg_sec_unbox
#define LOB_READING 1
#define LOB_WRITING 2
#define LOB_BUFLEN 512
#define MAX_LOB_WRITE 7000
typedef struct lob_stream_tag {
SCM conn; /* The connection on which the LOB fd is open */
Oid oid; /* The Oid of the LOB */
int fd; /* The file-descriptor for an open large object */
} lob_stream;
/* LOB_CONN takes a lob_stream pointer and returns the PGconn pointer for
that stream. Because SCM_DEFER/ALLOW_INTS are used in sec_unbox, this
macro cannot be used inside SCM_DEFER/ALLOW_INTS. FIXME: Is this still true?
*/
#define LOB_CONN(x) (sec_unbox ((x)->conn)->dbconn)
#define SCM_LOBPORTP(x) (SCM_TYP16 (x)==lob_ptype)
#define SCM_OPLOBPORTP(x) (((0xffff | SCM_OPN) & (int)SCM_CAR (x))== (lob_ptype | SCM_OPN))
#define SCM_OPINLOBPORTP(x) (((0xffff | SCM_OPN | SCM_RDNG) & (int)SCM_CAR (x))== (lob_ptype | SCM_OPN | SCM_RDNG))
#define SCM_OPOUTLOBPORTP(x) (((0xffff | SCM_OPN | SCM_WRTNG) & (int)SCM_CAR (x))== (lob_ptype | SCM_OPN | SCM_WRTNG))
/* ttn hack */
#define TTN_COERCE_INT(x) ((int)(x))
long lob_ptype;
static SCM lob_mklobport (SCM conn, Oid oid, int fd, long modes, const char *caller);
PG_DEFINE (lob_lo_creat, "pg-lo-creat", 2, 0, 0,
(SCM conn, SCM modes),
"Create a new large object and open a port over it for reading\n"
"and/or writing. @var{modes} is a string describing the mode in\n"
"which the port is to be opened. The mode string must include\n"
"one of @code{r} for reading, @code{w} for writing or @code{a}\n"
"for append (but since the object is empty to start with this is\n"
"the same as @code{w}.) The return value is a large object port\n"
"which can be used to read or write data to/from the object, or\n"
"@code{#f} on failure in which case @code{pg-error-message} from\n"
"the connection should give some idea of what happened.\n\n"
"In addition to returning @code{#f} on failure this procedure\n"
"throws a @code{misc-error} if the @code{modes} string is invalid.")
#define FUNC_NAME s_lob_lo_creat
{
long mode_bits;
PGconn *dbconn;
int fd = 0;
Oid oid;
int pg_modes = 0;
SCM_ASSERT (sec_p (conn), conn, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes),
modes, SCM_ARG2, FUNC_NAME);
if (SCM_SUBSTRP (modes)) /* Why do we do this? I don't know. */
modes = scm_makfromstr (SCM_ROCHARS (modes), SCM_ROLENGTH (modes), 0);
mode_bits = scm_mode_bits (SCM_ROCHARS (modes));
dbconn = sec_unbox (conn)->dbconn;
if (mode_bits & SCM_RDNG)
pg_modes |= INV_READ;
if (mode_bits & SCM_WRTNG)
pg_modes |= INV_WRITE;
if (pg_modes == 0)
scm_misc_error (FUNC_NAME, "Invalid mode specification %s",
scm_listify (modes, SCM_UNDEFINED));
SCM_DEFER_INTS;
if ((oid = lo_creat (dbconn, INV_READ | INV_WRITE)) != 0)
fd = lo_open (dbconn, oid, pg_modes);
SCM_ALLOW_INTS;
if (oid <= 0)
return SCM_BOOL_F;
if (fd < 0) {
SCM_DEFER_INTS;
(void) lo_unlink (dbconn, oid);
SCM_ALLOW_INTS;
return SCM_BOOL_F;
}
return lob_mklobport (conn, oid, fd, mode_bits, FUNC_NAME);
}
#undef FUNC_NAME
PG_DEFINE (lob_lo_open, "pg-lo-open", 3, 0, 0,
(SCM conn, SCM oid, SCM modes),
"Open a port over an existing large object. The port can be\n"
"used to read or write data from/to the object. @var{oid}\n"
"should be an integer identifier representing the large object.\n"
"@var{modes} must be a string describing the mode in which the\n"
"port is to be opened. The mode string must include one of\n"
"@code{r} for reading, @code{w} for writing, @code{a} for\n"
"append or @code{+} with any of the above indicating both\n"
"reading and writing/appending. @code{A} is equivalent to\n"
"opening the port for writing and immediately doing a\n"
"@code{(pg-lo-seek)} to the end. The return value is either\n"
"an open large object port or @code{#f} on failure in which\n"
"case @code{pg-error-message} from the connection should give\n"
"some idea of what happened.\n\n"
"Throw @code{misc-error} if the @code{modes} is invalid.")
#define FUNC_NAME s_lob_lo_open
{
long mode_bits;
PGconn *dbconn;
int fd;
Oid pg_oid;
int pg_modes = 0;
SCM_ASSERT (sec_p (conn), conn, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (oid), oid, SCM_ARG2, FUNC_NAME);
SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes),
modes, SCM_ARG3, FUNC_NAME);
if (SCM_SUBSTRP (modes))
modes = scm_makfromstr (SCM_ROCHARS (modes), SCM_ROLENGTH (modes), 0);
mode_bits = scm_mode_bits (SCM_ROCHARS (modes));
dbconn = sec_unbox (conn)->dbconn;
if (mode_bits & SCM_RDNG)
pg_modes |= INV_READ;
if (mode_bits & SCM_WRTNG)
pg_modes |= INV_WRITE;
if (pg_modes == 0)
scm_misc_error (FUNC_NAME, "Invalid mode specification %s",
scm_listify (modes, SCM_UNDEFINED));
pg_oid = SCM_INUM (oid);
SCM_DEFER_INTS;
fd = lo_open (dbconn, pg_oid, pg_modes);
SCM_ALLOW_INTS;
if (fd < 0)
return SCM_BOOL_F;
if (strchr (SCM_ROCHARS (modes), 'a')) {
SCM_DEFER_INTS;
if (lo_lseek (dbconn, fd, 0, SEEK_END) < 0) {
(void) lo_close (dbconn, fd);
SCM_ALLOW_INTS;
return SCM_BOOL_F;
}
SCM_ALLOW_INTS;
}
return lob_mklobport (conn, pg_oid, fd, mode_bits, FUNC_NAME);
}
#undef FUNC_NAME
static SCM
lob_mklobport (SCM conn, Oid oid, int fd, long modes, const char *caller)
{
SCM port;
lob_stream *lobp;
scm_port *pt;
const char *s_lob_mklobport = "lob_mklobport";
lobp = (lob_stream *) scm_must_malloc (sizeof (lob_stream), "PG-LO-PORT");
SCM_NEWCELL (port);
SCM_DEFER_INTS;
lobp->conn = conn;
lobp->oid = oid;
lobp->fd = fd;
pt = scm_add_to_port_table (port);
SCM_SETPTAB_ENTRY (port, pt);
SCM_SETCAR (port, lob_ptype | modes);
SCM_SETSTREAM (port, (SCM) lobp);
pt->rw_random = 1;
if (SCM_INPUT_PORT_P (port)) {
pt->read_buf = malloc (LOB_BUFLEN);
if (pt->read_buf == NULL)
scm_memory_error (s_lob_mklobport);
pt->read_pos = pt->read_end = pt->read_buf;
pt->read_buf_size = LOB_BUFLEN;
} else {
pt->read_buf = ((unsigned char *) pt->read_pos) = pt->read_end = &pt->shortbuf;
pt->read_buf_size = 1;
}
if (SCM_OUTPUT_PORT_P (port)) {
pt->write_buf = malloc (LOB_BUFLEN);
if (pt->write_buf == NULL)
scm_memory_error (s_lob_mklobport);
pt->write_pos = pt->write_buf;
pt->write_buf_size = LOB_BUFLEN;
} else {
pt->write_buf = pt->write_pos = &pt->shortbuf;
pt->write_buf_size = 1;
}
pt->write_end = pt->write_buf + pt->write_buf_size;
SCM_SETCAR (port, TTN_COERCE_INT (SCM_CAR (port)) & ~SCM_BUF0);
SCM_ALLOW_INTS;
return port;
}
PG_DEFINE (lob_lo_unlink, "pg-lo-unlink", 2, 0, 0,
(SCM conn, SCM oid),
"Delete the large object identified by @var{oid}.\n"
"Return @code{#t} if the object was successfully deleted,\n"
"@code{#f} otherwise, in which case @code{pg-error-message}\n"
"applied to @code{conn} should give an idea of what went wrong.")
#define FUNC_NAME s_lob_lo_unlink
{
int ret;
PGconn *dbconn;
SCM_ASSERT (sec_p (conn), conn, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (oid), oid, SCM_ARG2, FUNC_NAME);
dbconn = sec_unbox (conn)->dbconn;
SCM_DEFER_INTS;
ret = lo_unlink (dbconn, SCM_INUM (oid));
SCM_ALLOW_INTS;
if (ret != 0)
return SCM_BOOL_F;
return SCM_BOOL_T;
}
#undef FUNC_NAME
PG_DEFINE (lob_lo_get_connection, "pg-lo-get-connection", 1, 0, 0,
(SCM port),
"Return the connection associated with a given large object port.\n"
"@var{Port} must be a large object port returned from\n"
"@code{pg-lo-creat} or @code{pg-lo-open}.")
#define FUNC_NAME s_lob_lo_get_connection
{
SCM_ASSERT (SCM_NIMP (port) && SCM_OPLOBPORTP (port),
port, SCM_ARG1, FUNC_NAME);
return ((lob_stream *)SCM_STREAM (port))->conn;
}
#undef FUNC_NAME
PG_DEFINE (lob_lo_get_oid, "pg-lo-get-oid", 1, 0, 0,
(SCM port),
"Return the integer identifier of the object to which a given\n"
"port applies. @var{Port} must be a large object port returned\n"
"from @code{pg-lo-creat} or @code{pg-lo-open}.")
#define FUNC_NAME s_lob_lo_get_oid
{
SCM_ASSERT (SCM_NIMP (port) && SCM_LOBPORTP (port),
port, SCM_ARG1, FUNC_NAME);
return SCM_MAKINUM (((lob_stream *)SCM_STREAM (port))->oid);
}
#undef FUNC_NAME
PG_DEFINE (lob_lo_tell, "pg-lo-tell", 1, 0, 0,
(SCM port),
"Return the position of the file pointer for the given large\n"
"object port. @var{Port} must be a large object port returned\n"
"from @code{pg-lo-creat} or @code{pg-lo-open}. The return\n"
"value is either an integer greater than or equal to zero or\n"
"@code{#f} if an error occurred. In the latter case\n"
"@code{pg-error-message} applied to @code{conn} should\n"
"explain what went wrong.")
#define FUNC_NAME s_lob_lo_tell
{
SCM_ASSERT (SCM_NIMP (port)&&SCM_OPLOBPORTP (port),port,SCM_ARG1,FUNC_NAME);
return scm_seek (port, SCM_INUM0, SCM_MAKINUM (SEEK_CUR));
}
#undef FUNC_NAME
/* During lob_flush error, we decide whether to use scm_syserror ("normal"
error mechanism) or to write directly to stderr, depending on libguile's
variable: scm_terminating. If it's not available in some form (see
configure.in comments), we arrange to unconditionally write to stderr
instead of risking further muck-up. */
#ifndef HAVE_SCM_TERMINATING
# ifdef HAVE_LIBGUILE_TERMINATING
extern int terminating;
# define scm_terminating terminating
# endif /* HAVE_LIBGUILE_TERMINATING */
#endif /* !HAVE_SCM_TERMINATING */
static void
lob_flush (SCM port)
{
scm_port *pt = SCM_PTAB_ENTRY (port);
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
PGconn *conn = LOB_CONN (lobp);
char *ptr = pt->write_buf;
int init_size = pt->write_pos - pt->write_buf;
int remaining = init_size;
while (remaining > 0) {
int count;
#ifdef DEBUG_TRACE_LO_WRITE
fprintf (stderr, "lob_flush (): lo_write (%.*s, %d) ... ", remaining, ptr, remaining);
#endif
SCM_DEFER_INTS;
count = lo_write (conn, lobp->fd, ptr, remaining);
SCM_ALLOW_INTS;
#ifdef DEBUG_TRACE_LO_WRITE
fprintf (stderr, "returned %d\n", count);
#endif
if (count < remaining) {
/* error. assume nothing was written this call, but
fix up the buffer for any previous successful writes. */
int done = init_size - remaining;
if (done > 0) {
int i;
for (i = 0; i < remaining; i++) {
* (pt->write_buf + i) = * (pt->write_buf + done + i);
}
pt->write_pos = pt->write_buf + remaining;
}
#if defined (HAVE_SCM_TERMINATING) || defined (HAVE_LIBGUILE_TERMINATING)
if (! scm_terminating)
scm_syserror ("lob_flush");
else
#endif /* HAVE_LIBGUILE_TERMINATING || HAVE_LIBGUILE_TERMINATING */
{
const char *msg = "Error: could not flush large object file descriptor ";
char buf[11];
write (2, msg, strlen (msg));
sprintf (buf, "%d\n", lobp->fd);
write (2, buf, strlen (buf));
count = remaining;
}
}
ptr += count;
remaining -= count;
}
pt->write_pos = pt->write_buf;
}
static void
lob_end_input (SCM port, int offset)
{
scm_port *pt = SCM_PTAB_ENTRY (port);
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
PGconn *conn = LOB_CONN (lobp);
int ret;
offset += pt->read_end - pt->read_pos;
if (offset > 0) {
pt->read_pos = pt->read_end;
SCM_DEFER_INTS;
ret = lo_lseek (conn, lobp->fd, -offset, SEEK_CUR);
SCM_ALLOW_INTS;
if (ret == -1)
scm_misc_error ("lob_end_input", "Error seeking on lo port %s",
scm_listify (port, SCM_UNDEFINED));
}
pt->rw_active = SCM_PORT_NEITHER;
}
static off_t lob_seek (SCM port, off_t offset, int whence);
PG_DEFINE (lob_lo_seek, "pg-lo-seek", 3, 0, 0,
(SCM port, SCM where, SCM whence),
"Set the position of the next read or write to/from the given\n"
"large object port. @var{Port} must be a large object port\n"
"returned from @code{pg-lo-creat} or @code{pg-lo-open}.\n"
"@var{Where} is the position to set the pointer. @var{Whence}\n"
"must be one of\n\n"
"@table @code\n\n"
"@item SEEK_SET\n"
"Relative to the beginning of the file.\n\n"
"@item SEEK_CUR\n"
"Relative to the current position.\n\n"
"@item SEEK_END\n"
"Relative to the end of the file.\n\n"
"@end table\n"
"The return value is an integer which is the new position\n"
"relative to the beginning of the object, or a number less than\n"
"zero if an error occurred.")
#define FUNC_NAME s_lob_lo_seek
{
SCM_ASSERT (SCM_NIMP (port) && SCM_OPLOBPORTP (port),
port, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (where), where, SCM_ARG2, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, FUNC_NAME);
lob_flush (port);
return SCM_MAKINUM (lob_seek (port, SCM_INUM (where), SCM_INUM (whence)));
}
#undef FUNC_NAME
/* fill a port's read-buffer with a single read.
returns the first char and moves the read_pos pointer past it.
or returns EOF if end of file. */
static int
lob_fill_input (SCM port)
{
scm_port *pt = SCM_PTAB_ENTRY (port);
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
PGconn *conn = LOB_CONN (lobp);
int ret;
if (pt->write_pos > pt->write_buf)
lob_flush (port);
SCM_DEFER_INTS;
ret = lo_read (conn, lobp->fd, pt->read_buf, pt->read_buf_size);
SCM_ALLOW_INTS;
#ifdef DEBUG_LO_READ
fprintf (stderr, "lob_fill_input: lo_read (%d) returned %d.\n", pt->read_buf_size, ret);
#endif
if (ret != pt->read_buf_size) {
if (ret == 0)
return EOF;
else if (ret < 0)
scm_misc_error ("lob_fill_buffer","Error (%s) reading from lo port %s",
scm_listify (SCM_MAKINUM (ret), port, SCM_UNDEFINED));
}
pt->read_pos = pt->read_buf;
pt->read_end = pt->read_buf + ret;
#ifdef DEBUG_LO_READ
fprintf (stderr, "lob_fill_input: returning %c.\n", * (pt->read_buf));
#endif
return * (pt->read_buf);
}
static void
lob_write (SCM port, const void *data, size_t size)
{
scm_port *pt = SCM_PTAB_ENTRY (port);
if (pt->write_buf == &pt->shortbuf) {
/* "unbuffered" port. */
int fdes = SCM_FSTREAM (port)->fdes;
if (write (fdes, data, size) == -1)
scm_syserror ("fport_write");
} else {
const char *input = (char *) data;
size_t remaining = size;
while (remaining > 0) {
int space = pt->write_end - pt->write_pos;
int write_len = (remaining > space) ? space : remaining;
memcpy (pt->write_pos, input, write_len);
pt->write_pos += write_len;
remaining -= write_len;
input += write_len;
if (write_len == space)
lob_flush (port);
}
/* handle line buffering. */
if ((TTN_COERCE_INT (SCM_CAR (port)) & SCM_BUFLINE)
&& memchr (data, '\n', size))
lob_flush (port);
}
}
static off_t
lob_seek (SCM port, off_t offset, int whence)
{
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
PGconn *conn = LOB_CONN (lobp);
off_t ret;
SCM_DEFER_INTS;
ret = lo_lseek (conn, lobp->fd, offset, whence);
SCM_ALLOW_INTS;
if (ret == -1)
scm_misc_error ("lob_seek", "Error (%s) seeking on lo port %s",
scm_listify (SCM_MAKINUM (ret), port, SCM_UNDEFINED));
/* Adjust return value to account for guile port buffering. */
if (SEEK_CUR == whence) {
scm_port *pt = SCM_PTAB_ENTRY (port);
ret -= (pt->read_end - pt->read_pos);
}
return ret;
}
/* Check whether a port can supply input. */
static int
lob_input_waiting_p (SCM port)
{
return 1;
}
PG_DEFINE (lob_lo_read, "pg-lo-read", 3, 0, 0,
(SCM siz, SCM num, SCM port),
"Read @var{num} objects each of length @var{siz} from @var{port}.\n"
"Return a string containing the data read from the port or\n"
"@code{#f} if an error occurred.")
#define FUNC_NAME s_lob_lo_read
{
scm_sizet n;
SCM str;
int len;
int done = 0;
SCM_ASSERT (SCM_INUMP (siz), siz, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (num), num, SCM_ARG2, FUNC_NAME);
SCM_ASSERT (SCM_NIMP (port) && SCM_OPINLOBPORTP (port),
port, SCM_ARG3, FUNC_NAME);
len = SCM_INUM (siz) * SCM_INUM (num);
str = scm_make_string (SCM_MAKINUM (len), SCM_UNDEFINED);
for (n = 0 ; n < SCM_INUM (num) && ! done; n++) {
scm_sizet m;
int c;
for (m = 0; m < SCM_INUM (siz); m++) {
c = scm_getc (port);
if (c == EOF) {
done = 1;
break;
}
* (SCM_CHARS (str) + n * SCM_INUM (siz) + m) = c;
}
}
if (n < 0)
return SCM_BOOL_F;
if (n < SCM_INUM (num)) {
SCM_DEFER_INTS; /* See comment re scm_vector_set_len in libguile/unif.c */
scm_vector_set_length_x (str, SCM_MAKINUM (n * SCM_INUM (siz)));
SCM_ALLOW_INTS;
}
return str;
}
#undef FUNC_NAME
static int
lob_close (SCM port)
{
scm_port *pt = SCM_PTAB_ENTRY (port);
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
PGconn *dbconn = LOB_CONN (lobp);
int ret;
lob_flush (port);
SCM_DEFER_INTS;
ret = lo_close (dbconn, lobp->fd);
SCM_ALLOW_INTS;
if (pt->read_buf != &pt->shortbuf)
scm_must_free (pt->read_buf);
if (pt->write_buf != &pt->shortbuf)
scm_must_free (pt->write_buf);
if (ret != 0)
return EOF;
return 0;
}
static SCM
lob_mark (SCM port)
{
lob_stream *lobp;
if (SCM_OPENP (port)) {
lobp = (lob_stream *) SCM_STREAM (port);
return lobp->conn;
}
return SCM_BOOL_F;
}
static scm_sizet
lob_free (SCM port)
{
lob_stream *lobp = (lob_stream *) SCM_STREAM (port);
int ret;
if (SCM_OPENP (port)) {
ret = lob_close (port);
}
free (lobp);
return 0;
}
PG_DEFINE (lob_lo_import, "pg-lo-import", 2, 0, 0,
(SCM conn, SCM filename),
"Create a new large object and loads it with the contents of\n"
"the specified file. @var{Filename} must be a string containing\n"
"the name of the file to be loaded into the new object. Return\n"
"the integer identifier (OID) of the newly created large object,\n"
"or @code{#f} if an error occurred, in which case\n"
"@code{pg-error-message} should be consulted to determine\n"
"the failure.")
#define FUNC_NAME s_lob_lo_import
{
PGconn *dbconn;
int ret;
SCM_ASSERT (sec_p (conn), conn, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
filename, SCM_ARG2, FUNC_NAME);
dbconn = sec_unbox (conn)->dbconn;
SCM_DEFER_INTS;
ret = lo_import (dbconn, SCM_ROCHARS (filename));
SCM_ALLOW_INTS;
if (ret <= 0)
return SCM_BOOL_F;
return SCM_MAKINUM (ret);
}
#undef FUNC_NAME
PG_DEFINE (lob_lo_export, "pg-lo-export", 3, 0, 0,
(SCM conn, SCM oid, SCM filename),
"Write the contents of a given large object to a file.\n"
"@var{Oid} is the integer identifying the large object to be\n"
"exported and @var{filename} the name of the file to contain the\n"
"object data. Return @code{#t} on success, @code{#f} otherwise,\n"
"in which case @code{pg-error-message} may offer an explanation\n"
"of the failure.")
#define FUNC_NAME s_lob_lo_export
{
PGconn *dbconn;
Oid pg_oid;
int ret;
SCM_ASSERT (sec_p (conn), conn, SCM_ARG1, FUNC_NAME);
SCM_ASSERT (SCM_INUMP (oid), oid, SCM_ARG2, FUNC_NAME);
SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
SCM_ARG3, FUNC_NAME);
dbconn = sec_unbox (conn)->dbconn;
pg_oid = SCM_INUM (oid);
SCM_DEFER_INTS;
ret = lo_export (dbconn, pg_oid, SCM_ROCHARS (filename));
SCM_ALLOW_INTS;
if (ret != 1)
return SCM_BOOL_F;
return SCM_BOOL_T;
}
#undef FUNC_NAME
static int lob_printpt (SCM exp, SCM port, scm_print_state *pstate);
static int
lob_printpt (SCM exp, SCM port, scm_print_state *pstate)
{
scm_puts ("#<PG-LO-PORT:", port);
scm_print_port_mode (exp, port);
if (SCM_OPENP (exp)) {
lob_stream *lobp = (lob_stream *) SCM_STREAM (exp);
scm_extended_dbconn *sec = sec_unbox (lobp->conn);
char *dbstr = PQdb (sec->dbconn);
char *hoststr = PQhost (sec->dbconn);
char *portstr = PQport (sec->dbconn);
char *optionsstr = PQoptions (sec->dbconn);
scm_intprint (lobp->fd, 10, port); scm_puts (":", port);
scm_intprint (lobp->oid, 10, port); scm_puts (":", port);
scm_puts ("#<PG-CONN:", port);
scm_intprint (sec->count, 10, port); scm_putc (':', port);
scm_puts (IFNULL (dbstr,"db?"), port); scm_putc (':', port);
scm_puts (IFNULL (hoststr,"localhost"), port); scm_putc (':', port);
scm_puts (IFNULL (portstr,"port?"), port); scm_putc (':', port);
scm_puts (IFNULL (optionsstr,"options?"), port);
scm_putc ('>', port);
}
scm_putc ('>', port);
return 1;
}
void init_libpostgres_lo (void)
{
long tc = scm_make_port_type ("pg-lo-port", lob_fill_input, lob_write);
scm_set_port_free (tc, lob_free);
scm_set_port_mark (tc, lob_mark);
scm_set_port_print (tc, lob_printpt);
scm_set_port_flush (tc, lob_flush);
scm_set_port_end_input (tc, lob_end_input);
scm_set_port_close (tc, lob_close);
scm_set_port_seek (tc, lob_seek);
scm_set_port_truncate (tc, NULL);
scm_set_port_input_waiting (tc, lob_input_waiting_p);
lob_ptype = tc;
#include "libpostgres_lo.x"
}
/* libpostgres_lo.c ends here */
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