ttymode.c (1873B)
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 "ttymode.h" 22 23#include <stdarg.h> 24#include <stdbool.h> 25#include <stdlib.h> 26#include <string.h> 27 28int guac_ssh_ttymodes_init(char opcode_array[], ...) { 29 30 /* Initialize the variable argument list. */ 31 va_list args; 32 va_start(args, opcode_array); 33 34 /* Initialize array pointer and byte counter. */ 35 char *current = opcode_array; 36 37 /* Loop through variable argument list. */ 38 while (true) { 39 40 /* Next argument should be an opcode. */ 41 char opcode = (char)va_arg(args, int); 42 *(current++) = opcode; 43 44 /* If it's the end opcode, we're done. */ 45 if (opcode == GUAC_SSH_TTY_OP_END) 46 break; 47 48 /* Next argument should be 4-byte value. */ 49 uint32_t value = va_arg(args, uint32_t); 50 *(current++) = (value >> 24) & 0xFF; 51 *(current++) = (value >> 16) & 0xFF; 52 *(current++) = (value >> 8) & 0xFF; 53 *(current++) = value & 0xFF; 54 } 55 56 /* We're done processing arguments. */ 57 va_end(args); 58 59 return current - opcode_array; 60 61}