io.c (1716B)
1/* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20#include "config.h" 21#include "common/io.h" 22 23#include <unistd.h> 24 25int guac_common_write(int fd, void* buffer, int length) { 26 27 unsigned char* bytes = (unsigned char*) buffer; 28 29 while (length > 0) { 30 31 /* Attempt write */ 32 int bytes_written = write(fd, bytes, length); 33 if (bytes_written < 0) 34 return bytes_written; 35 36 /* Update buffer */ 37 length -= bytes_written; 38 bytes += bytes_written; 39 40 } 41 42 /* Success */ 43 return length; 44 45} 46 47int guac_common_read(int fd, void* buffer, int length) { 48 49 unsigned char* bytes = (unsigned char*) buffer; 50 51 while (length > 0) { 52 53 /* Attempt read */ 54 int bytes_read = read(fd, bytes, length); 55 if (bytes_read < 0) 56 return bytes_read; 57 58 /* Update buffer */ 59 length -= bytes_read; 60 bytes += bytes_read; 61 62 } 63 64 /* Success */ 65 return length; 66 67} 68