ossp-pkg/l2/l2_stream.c
1.7
/*
** L2 - OSSP Logging Library
** Copyright (c) 2001 The OSSP Project (http://www.ossp.org/)
** Copyright (c) 2001 Cable & Wireless Deutschland (http://www.cw.com/de/)
**
** This file is part of OSSP L2, a flexible logging library which
** can be found at http://www.ossp.org/pkg/l2/.
**
** Permission to use, copy, modify, and distribute this software for
** any purpose with or without fee is hereby granted, provided that
** the above copyright notice and this permission notice appear in all
** copies.
**
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
** 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.
**
** l2.c: internal C implementation
**
*/
#include "l2.h"
#include "l2_p.h"
l2_stream_t *l2_stream_create(void)
{
l2_stream_t *st;
int i;
if ((st = (l2_stream_t *)malloc(sizeof(l2_stream_t))) == NULL)
return NULL;
st->levelmask = 0;
for (i = 0; i < L2_MAX_CHANNELS; i++)
st->channels[i].ch = NULL;
for (i = 0; i < L2_MAX_FORMATTERS; i++)
st->formatters[i].cb = NULL;
return st;
}
l2_result_t l2_stream_channel(l2_stream_t *st, l2_channel_t *ch, unsigned int levelmask)
{
int i;
if (st == NULL || ch == NULL || levelmask == 0)
return L2_ERROR;
for (i = 0; i < L2_MAX_CHANNELS && st->channels[i].ch != NULL; i++)
;
if (i == L2_MAX_CHANNELS)
return L2_ERROR;
st->channels[i].ch = ch;
st->channels[i].levelmask = levelmask;
return L2_OK;
}
l2_result_t l2_stream_formatter(l2_stream_t *st, const char *name, l2_formatter_t cb, l2_context_t *ctx)
{
int i;
if (st == NULL || name == NULL || cb != NULL)
return L2_ERROR;
for (i = 0; i < L2_MAX_FORMATTERS && st->formatters[i].cb != NULL; i++)
;
if (i == L2_MAX_FORMATTERS)
return L2_ERROR;
st->formatters[i].name = strdup(name);
st->formatters[i].ctx = ctx;
st->formatters[i].cb = cb;
return L2_OK;
}
l2_result_t l2_stream_levels(l2_stream_t *st, unsigned int levelmask, unsigned int *levelmaskold)
{
if (st == NULL)
return L2_ERROR;
if (levelmaskold != NULL)
*levelmaskold = st->levelmask;
st->levelmask = levelmask;
return L2_OK;
}
l2_result_t l2_stream_log(l2_stream_t *st, unsigned int level, const char *fmt, ...)
{
va_list ap;
l2_result_t rv;
if (st == NULL || level == 0 || fmt == NULL)
return L2_ERROR;
va_start(ap, fmt);
rv = l2_stream_vlog(st, level, fmt, ap);
va_end(ap);
return rv;
}
l2_result_t l2_stream_vlog(l2_stream_t *st, unsigned int level, const char *fmt, va_list ap)
{
int i;
int l, j;
size_t len;
l2_result_t rv;
if (st == NULL || fmt == NULL || ap == NULL)
return L2_ERROR;
/* make sure only a single level is specified */
for (l = level, j = 0; l != 0; l = (l >> 1))
j++;
if (j != 1)
return L2_ERROR;
/* check whether level is globally enabled */
if (!(st->levelmask & level))
return L2_OK;
/* XXX use st->formatter!! XXX */
len = vsnprintf(st->message, L2_MAX_MSGSIZE, fmt, ap);
rv = L2_OK;
for (i = 0; i < L2_MAX_CHANNELS && st->channels[i].ch != NULL; i++) {
if (st->channels[i].levelmask & level) {
if ((rv = l2_channel_write(st->channels[i].ch, st->message, len)) != L2_OK)
break;
}
}
return rv;
}
l2_result_t l2_stream_destroy(l2_stream_t *st)
{
int i;
if (st == NULL)
return L2_ERROR;
for (i = 0; i < L2_MAX_CHANNELS && st->channels[i].ch != NULL; i++)
l2_channel_destroy(st->channels[i].ch);
for (i = 0; i < L2_MAX_FORMATTERS && st->formatters[i].cb != NULL; i++)
free(st->formatters[i].name);
free(st);
return L2_OK;
}