1*0957b409SSimon J. Gerraty /* 2*0957b409SSimon J. Gerraty * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3*0957b409SSimon J. Gerraty * 4*0957b409SSimon J. Gerraty * Permission is hereby granted, free of charge, to any person obtaining 5*0957b409SSimon J. Gerraty * a copy of this software and associated documentation files (the 6*0957b409SSimon J. Gerraty * "Software"), to deal in the Software without restriction, including 7*0957b409SSimon J. Gerraty * without limitation the rights to use, copy, modify, merge, publish, 8*0957b409SSimon J. Gerraty * distribute, sublicense, and/or sell copies of the Software, and to 9*0957b409SSimon J. Gerraty * permit persons to whom the Software is furnished to do so, subject to 10*0957b409SSimon J. Gerraty * the following conditions: 11*0957b409SSimon J. Gerraty * 12*0957b409SSimon J. Gerraty * The above copyright notice and this permission notice shall be 13*0957b409SSimon J. Gerraty * included in all copies or substantial portions of the Software. 14*0957b409SSimon J. Gerraty * 15*0957b409SSimon J. Gerraty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16*0957b409SSimon J. Gerraty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17*0957b409SSimon J. Gerraty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18*0957b409SSimon J. Gerraty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19*0957b409SSimon J. Gerraty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20*0957b409SSimon J. Gerraty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21*0957b409SSimon J. Gerraty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22*0957b409SSimon J. Gerraty * SOFTWARE. 23*0957b409SSimon J. Gerraty */ 24*0957b409SSimon J. Gerraty 25*0957b409SSimon J. Gerraty using System; 26*0957b409SSimon J. Gerraty using System.IO; 27*0957b409SSimon J. Gerraty using System.Text; 28*0957b409SSimon J. Gerraty 29*0957b409SSimon J. Gerraty /* 30*0957b409SSimon J. Gerraty * A simple class for writing out bytes as hexadecimal constants or 31*0957b409SSimon J. Gerraty * explicit expressions for the initializer of a C array of 'unsigned 32*0957b409SSimon J. Gerraty * char'. It starts every line with a given number of tabs, and aims at 33*0957b409SSimon J. Gerraty * keeping lines below a given threshold (each indentation tab counts as 34*0957b409SSimon J. Gerraty * 8 characters). An explicit newline is inserted before the first 35*0957b409SSimon J. Gerraty * element, and commas are used as separators. 36*0957b409SSimon J. Gerraty */ 37*0957b409SSimon J. Gerraty 38*0957b409SSimon J. Gerraty class BlobWriter { 39*0957b409SSimon J. Gerraty 40*0957b409SSimon J. Gerraty TextWriter w; 41*0957b409SSimon J. Gerraty int maxLineLen; 42*0957b409SSimon J. Gerraty int indent; 43*0957b409SSimon J. Gerraty int lineLen; 44*0957b409SSimon J. Gerraty 45*0957b409SSimon J. Gerraty /* 46*0957b409SSimon J. Gerraty * Create a new instance. 'maxLineLen' is in characters, and 47*0957b409SSimon J. Gerraty * 'indent' is the number of tab characters at the start of 48*0957b409SSimon J. Gerraty * each line. 49*0957b409SSimon J. Gerraty */ 50*0957b409SSimon J. Gerraty internal BlobWriter(TextWriter w, int maxLineLen, int indent) 51*0957b409SSimon J. Gerraty { 52*0957b409SSimon J. Gerraty this.w = w; 53*0957b409SSimon J. Gerraty this.maxLineLen = maxLineLen; 54*0957b409SSimon J. Gerraty this.indent = indent; 55*0957b409SSimon J. Gerraty lineLen = -1; 56*0957b409SSimon J. Gerraty } 57*0957b409SSimon J. Gerraty 58*0957b409SSimon J. Gerraty void DoNL() 59*0957b409SSimon J. Gerraty { 60*0957b409SSimon J. Gerraty w.WriteLine(); 61*0957b409SSimon J. Gerraty for (int i = 0; i < indent; i ++) { 62*0957b409SSimon J. Gerraty w.Write('\t'); 63*0957b409SSimon J. Gerraty } 64*0957b409SSimon J. Gerraty lineLen = (indent << 3); 65*0957b409SSimon J. Gerraty } 66*0957b409SSimon J. Gerraty 67*0957b409SSimon J. Gerraty /* 68*0957b409SSimon J. Gerraty * Append a new byte value; it will be converted to an hexadecimal 69*0957b409SSimon J. Gerraty * constant in the output. 70*0957b409SSimon J. Gerraty */ 71*0957b409SSimon J. Gerraty internal void Append(byte b) 72*0957b409SSimon J. Gerraty { 73*0957b409SSimon J. Gerraty if (lineLen < 0) { 74*0957b409SSimon J. Gerraty DoNL(); 75*0957b409SSimon J. Gerraty } else { 76*0957b409SSimon J. Gerraty w.Write(','); 77*0957b409SSimon J. Gerraty lineLen ++; 78*0957b409SSimon J. Gerraty if ((lineLen + 5) > maxLineLen) { 79*0957b409SSimon J. Gerraty DoNL(); 80*0957b409SSimon J. Gerraty } else { 81*0957b409SSimon J. Gerraty w.Write(' '); 82*0957b409SSimon J. Gerraty lineLen ++; 83*0957b409SSimon J. Gerraty } 84*0957b409SSimon J. Gerraty } 85*0957b409SSimon J. Gerraty w.Write("0x{0:X2}", b); 86*0957b409SSimon J. Gerraty lineLen += 4; 87*0957b409SSimon J. Gerraty } 88*0957b409SSimon J. Gerraty 89*0957b409SSimon J. Gerraty /* 90*0957b409SSimon J. Gerraty * Append a C expression, which will be used as is. The expression 91*0957b409SSimon J. Gerraty * may resolve to several bytes if it uses internal commas. The 92*0957b409SSimon J. Gerraty * writer will try to honour the expected line length, but it 93*0957b409SSimon J. Gerraty * won't insert a newline character inside the expression. 94*0957b409SSimon J. Gerraty */ 95*0957b409SSimon J. Gerraty internal void Append(string expr) 96*0957b409SSimon J. Gerraty { 97*0957b409SSimon J. Gerraty if (lineLen < 0) { 98*0957b409SSimon J. Gerraty DoNL(); 99*0957b409SSimon J. Gerraty } else { 100*0957b409SSimon J. Gerraty w.Write(','); 101*0957b409SSimon J. Gerraty lineLen ++; 102*0957b409SSimon J. Gerraty if ((lineLen + 1 + expr.Length) > maxLineLen) { 103*0957b409SSimon J. Gerraty DoNL(); 104*0957b409SSimon J. Gerraty } else { 105*0957b409SSimon J. Gerraty w.Write(' '); 106*0957b409SSimon J. Gerraty lineLen ++; 107*0957b409SSimon J. Gerraty } 108*0957b409SSimon J. Gerraty } 109*0957b409SSimon J. Gerraty w.Write("{0}", expr); 110*0957b409SSimon J. Gerraty lineLen += expr.Length; 111*0957b409SSimon J. Gerraty } 112*0957b409SSimon J. Gerraty } 113