1 /*- 2 * Copyright (c) 2013 David Chisnall 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #include <string> 34 #include <cstdio> 35 #include <cstdlib> 36 #include <ctype.h> 37 #include <libgen.h> 38 39 #include "util.hh" 40 41 using std::string; 42 43 namespace dtc 44 { 45 46 void 47 push_string(byte_buffer &buffer, const string &s, bool escapes) 48 { 49 size_t length = s.size(); 50 for (size_t i=0 ; i<length ; ++i) 51 { 52 uint8_t c = s[i]; 53 if (escapes && c == '\\' && i+1 < length) 54 { 55 c = s[++i]; 56 switch (c) 57 { 58 // For now, we just ignore invalid escape sequences. 59 default: 60 case '"': 61 case '\'': 62 case '\\': 63 break; 64 case 'a': 65 c = '\a'; 66 break; 67 case 'b': 68 c = '\b'; 69 break; 70 case 't': 71 c = '\t'; 72 break; 73 case 'n': 74 c = '\n'; 75 break; 76 case 'v': 77 c = '\v'; 78 break; 79 case 'f': 80 c = '\f'; 81 break; 82 case 'r': 83 c = '\r'; 84 break; 85 case '0'...'7': 86 { 87 int v = digittoint(c); 88 if (i+1 < length && s[i+1] <= '7' && s[i+1] >= '0') 89 { 90 v <<= 3; 91 v |= digittoint(s[i+1]); 92 i++; 93 if (i+1 < length && s[i+1] <= '7' && s[i+1] >= '0') 94 { 95 v <<= 3; 96 v |= digittoint(s[i+1]); 97 } 98 } 99 c = (uint8_t)v; 100 break; 101 } 102 case 'x': 103 { 104 ++i; 105 if (i >= length) 106 { 107 break; 108 } 109 int v = digittoint(s[i]); 110 if (i+1 < length && ishexdigit(s[i+1])) 111 { 112 v <<= 4; 113 v |= digittoint(s[++i]); 114 } 115 c = (uint8_t)v; 116 break; 117 } 118 } 119 } 120 buffer.push_back(c); 121 } 122 } 123 124 std::string dirname(const string &s) 125 { 126 if (s == string()) 127 { 128 return string(); 129 } 130 char *str = strdup(s.c_str()); 131 string dn(::dirname(str)); 132 free(str); 133 return dn; 134 } 135 136 std::string basename(const string &s) 137 { 138 if (s == string()) 139 { 140 return string(); 141 } 142 char *str = strdup(s.c_str()); 143 string bn(::basename(str)); 144 free(str); 145 return bn; 146 } 147 } // namespace dtc 148 149