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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "outputchannel.h"
#include "qemu-common.h"
struct OutputChannel {
void* opaque; /* caller-specific information */
OutputChannelPrintf printf; /* callback function to do the printing */
unsigned int written; /* number of bytes written to the channel */
};
OutputChannel* output_channel_alloc(void* opaque, OutputChannelPrintf cb)
{
OutputChannel* oc = qemu_mallocz(sizeof(*oc));
oc->printf = cb;
oc->opaque = opaque;
oc->written = 0;
return oc;
}
int output_channel_printf(OutputChannel* oc, const char* fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
ret = oc->printf(oc->opaque, fmt, ap);
va_end(ap);
/* Don't count errors and no-ops towards number of bytes written */
if (ret > 0) {
oc->written += ret;
}
return ret;
}
void output_channel_free(OutputChannel* oc)
{
free(oc);
}
unsigned int output_channel_written(OutputChannel* oc)
{
return oc->written;
}
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