| /* |
| * 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; |
| } |