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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.
*/
#ifndef _OUTPUTCHANNEL_H
#define _OUTPUTCHANNEL_H
#include <stdarg.h>
/* Callback function to print a printf-formatted string to a channel */
typedef int (*OutputChannelPrintf) (void* opaque, const char* fmt, va_list ap);
typedef struct OutputChannel OutputChannel;
/* Allocates a new output channel */
OutputChannel* output_channel_alloc(void* opaque, OutputChannelPrintf cb);
/* Prints a printf-formatted string to the output channel */
int output_channel_printf(OutputChannel* oc, const char* fmt, ...);
/* Frees an output channel */
void output_channel_free(OutputChannel* oc);
/* Returns the number of bytes written to the channel */
unsigned int output_channel_written(OutputChannel* oc);
#endif /* _OUTPUTCHANNEL_H */
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