qse/qse/lib/cmn/tio.c

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/*
* $Id: tio.c 559 2011-09-04 16:21:54Z hyunghwan.chung $
*
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Copyright 2006-2011 Chung, Hyung-Hwan.
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This file is part of QSE.
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QSE is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
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QSE 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with QSE. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <qse/cmn/tio.h>
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#include "mem.h"
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QSE_IMPLEMENT_COMMON_FUNCTIONS (tio)
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qse_tio_t* qse_tio_open (qse_mmgr_t* mmgr, qse_size_t xtnsize)
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{
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qse_tio_t* tio;
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if (mmgr == QSE_NULL)
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{
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mmgr = QSE_MMGR_GETDFL();
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QSE_ASSERTX (mmgr != QSE_NULL,
"Set the memory manager with QSE_MMGR_SETDFL()");
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if (mmgr == QSE_NULL) return QSE_NULL;
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}
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tio = QSE_MMGR_ALLOC (mmgr, QSE_SIZEOF(qse_tio_t) + xtnsize);
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if (tio == QSE_NULL) return QSE_NULL;
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if (qse_tio_init (tio, mmgr) <= -1)
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{
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QSE_MMGR_FREE (mmgr, tio);
return QSE_NULL;
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}
return tio;
}
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int qse_tio_close (qse_tio_t* tio)
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{
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int n = qse_tio_fini (tio);
QSE_MMGR_FREE (tio->mmgr, tio);
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return n;
}
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int qse_tio_init (qse_tio_t* tio, qse_mmgr_t* mmgr)
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{
if (mmgr == QSE_NULL) mmgr = QSE_MMGR_GETDFL();
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QSE_MEMSET (tio, 0, QSE_SIZEOF(*tio));
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tio->mmgr = mmgr;
/*
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tio->input_func = QSE_NULL;
tio->input_arg = QSE_NULL;
tio->output_func = QSE_NULL;
tio->output_arg = QSE_NULL;
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tio->input_status = 0;
tio->inbuf_curp = 0;
tio->inbuf_len = 0;
tio->outbuf_len = 0;
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*/
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tio->errnum = QSE_TIO_ENOERR;
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return 0;
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}
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int qse_tio_fini (qse_tio_t* tio)
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{
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qse_tio_flush (tio); /* don't care about the result */
if (qse_tio_detachin(tio) == -1) return -1;
if (qse_tio_detachout(tio) == -1) return -1;
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return 0;
}
qse_tio_errnum_t qse_tio_geterrnum (qse_tio_t* tio)
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{
return tio->errnum;
}
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const qse_char_t* qse_tio_geterrmsg (qse_tio_t* tio)
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{
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static const qse_char_t* __errmsg[] =
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{
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QSE_T("no error"),
QSE_T("out of memory"),
QSE_T("no more space"),
QSE_T("illegal multibyte sequence"),
QSE_T("incomplete multibyte sequence"),
QSE_T("illegal wide character"),
QSE_T("no input function attached"),
QSE_T("input function returned an error"),
QSE_T("input function failed to open"),
QSE_T("input function failed to closed"),
QSE_T("no output function attached"),
QSE_T("output function returned an error"),
QSE_T("output function failed to open"),
QSE_T("output function failed to closed"),
QSE_T("unknown error")
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};
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return __errmsg[
(tio->errnum < 0 || tio->errnum >= QSE_COUNTOF(__errmsg))?
QSE_COUNTOF(__errmsg) - 1: tio->errnum];
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}
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int qse_tio_attachin (qse_tio_t* tio, qse_tio_io_t input, void* arg)
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{
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if (qse_tio_detachin(tio) == -1) return -1;
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QSE_ASSERT (tio->input_func == QSE_NULL);
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if (input(QSE_TIO_IO_OPEN, arg, QSE_NULL, 0) == -1)
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{
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tio->errnum = QSE_TIO_EINPOP;
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return -1;
}
tio->input_func = input;
tio->input_arg = arg;
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tio->input_status = 0;
tio->inbuf_curp = 0;
tio->inbuf_len = 0;
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return 0;
}
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int qse_tio_detachin (qse_tio_t* tio)
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{
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if (tio->input_func != QSE_NULL)
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{
if (tio->input_func (
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QSE_TIO_IO_CLOSE, tio->input_arg, QSE_NULL, 0) == -1)
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{
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tio->errnum = QSE_TIO_EINPCL;
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return -1;
}
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tio->input_func = QSE_NULL;
tio->input_arg = QSE_NULL;
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}
return 0;
}
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int qse_tio_attachout (qse_tio_t* tio, qse_tio_io_t output, void* arg)
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{
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if (qse_tio_detachout(tio) == -1) return -1;
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QSE_ASSERT (tio->output_func == QSE_NULL);
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if (output(QSE_TIO_IO_OPEN, arg, QSE_NULL, 0) == -1)
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{
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tio->errnum = QSE_TIO_EOUTOP;
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return -1;
}
tio->output_func = output;
tio->output_arg = arg;
tio->outbuf_len = 0;
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return 0;
}
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int qse_tio_detachout (qse_tio_t* tio)
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{
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if (tio->output_func != QSE_NULL)
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{
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qse_tio_flush (tio); /* don't care about the result */
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if (tio->output_func (
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QSE_TIO_IO_CLOSE, tio->output_arg, QSE_NULL, 0) == -1)
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{
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tio->errnum = QSE_TIO_EOUTCL;
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return -1;
}
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tio->output_func = QSE_NULL;
tio->output_arg = QSE_NULL;
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}
return 0;
}
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qse_ssize_t qse_tio_flush (qse_tio_t* tio)
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{
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qse_size_t left, count;
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if (tio->output_func == QSE_NULL)
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{
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tio->errnum = QSE_TIO_ENOUTF;
return (qse_ssize_t)-1;
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}
left = tio->outbuf_len;
while (left > 0)
{
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qse_ssize_t n;
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n = tio->output_func (
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QSE_TIO_IO_DATA, tio->output_arg, tio->outbuf, left);
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if (n <= -1)
{
tio->outbuf_len = left;
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tio->errnum = QSE_TIO_EOUTPT;
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return -1;
}
if (n == 0) break;
left -= n;
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QSE_MEMCPY (tio->outbuf, &tio->inbuf[n], left);
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}
count = tio->outbuf_len - left;
tio->outbuf_len = left;
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return (qse_ssize_t)count;
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}
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void qse_tio_purge (qse_tio_t* tio)
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{
tio->input_status = 0;
tio->inbuf_curp = 0;
tio->inbuf_len = 0;
tio->outbuf_len = 0;
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tio->errnum = QSE_TIO_ENOERR;
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}