1/* 2 * Copyright (C) 2007-2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#if defined(_WIN32) 18 19#include <unistd.h> 20 21#include <log/uio.h> 22 23#include "log_portability.h" 24 25LIBLOG_ABI_PUBLIC int readv(int fd, struct iovec *vecs, int count) 26{ 27 int total = 0; 28 29 for ( ; count > 0; count--, vecs++ ) { 30 char* buf = vecs->iov_base; 31 int len = vecs->iov_len; 32 33 while (len > 0) { 34 int ret = read( fd, buf, len ); 35 if (ret < 0) { 36 if (total == 0) 37 total = -1; 38 goto Exit; 39 } 40 if (ret == 0) 41 goto Exit; 42 43 total += ret; 44 buf += ret; 45 len -= ret; 46 } 47 } 48Exit: 49 return total; 50} 51 52LIBLOG_ABI_PUBLIC int writev(int fd, const struct iovec *vecs, int count) 53{ 54 int total = 0; 55 56 for ( ; count > 0; count--, vecs++ ) { 57 const char* buf = vecs->iov_base; 58 int len = vecs->iov_len; 59 60 while (len > 0) { 61 int ret = write( fd, buf, len ); 62 if (ret < 0) { 63 if (total == 0) 64 total = -1; 65 goto Exit; 66 } 67 if (ret == 0) 68 goto Exit; 69 70 total += ret; 71 buf += ret; 72 len -= ret; 73 } 74 } 75Exit: 76 return total; 77} 78 79#endif 80