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C-Breeze C Compiler Infrastructure [ Project home page] |
output_context.cc
Go to the documentation of this file.00001 // $Id: output_context.cc,v 1.4 2003/08/07 23:14:02 pnav Exp $ 00002 // ---------------------------------------------------------------------- 00003 // 00004 // C-Breeze 00005 // C Compiler Framework 00006 // 00007 // Copyright (c) 2000 University of Texas at Austin 00008 // 00009 // Samuel Z. Guyer 00010 // Daniel A. Jimenez 00011 // Calvin Lin 00012 // 00013 // Permission is hereby granted, free of charge, to any person 00014 // obtaining a copy of this software and associated documentation 00015 // files (the "Software"), to deal in the Software without 00016 // restriction, including without limitation the rights to use, copy, 00017 // modify, merge, publish, distribute, sublicense, and/or sell copies 00018 // of the Software, and to permit persons to whom the Software is 00019 // furnished to do so, subject to the following conditions: 00020 // 00021 // The above copyright notice and this permission notice shall be 00022 // included in all copies or substantial portions of the Software. 00023 // 00024 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT 00028 // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 00029 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 00030 // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00031 // THE SOFTWARE. 00032 // 00033 // We acknowledge the C-to-C Translator from MIT Laboratory for 00034 // Computer Science for inspiring parts of the C-Breeze design. 00035 // 00036 // ---------------------------------------------------------------------- 00037 00038 #include "c_breeze.h" 00039 00040 int output_context::wrap_width = 80; 00041 00042 // ------------------------------------------------------------ 00043 // Output operators 00044 // ------------------------------------------------------------ 00045 00046 output_context & output_context::operator<<(const string & s) 00047 { 00048 _out << s; 00049 00050 int l = s.length(); 00051 if (l > 0) 00052 _last = s[l-1]; 00053 00054 _pos += s.length(); 00055 00056 return * this; 00057 } 00058 00059 output_context & output_context::operator<<(const char * s) 00060 { 00061 _out << s; 00062 00063 int l = strlen(s); 00064 if (l>0) 00065 _last = s[l-1]; 00066 00067 _pos += strlen(s); 00068 00069 return * this; 00070 } 00071 00072 output_context & output_context::operator<<(const char c) 00073 { 00074 _out << c; 00075 00076 if ((c == '(') || (c == '{')) 00077 _parens.push_front(_pos+1); 00078 00079 if ((c == ')') || (c == '}')) 00080 _parens.pop_front(); 00081 00082 _last = c; 00083 00084 _pos++; 00085 00086 return * this; 00087 } 00088 00089 // ------------------------------------------------------------ 00090 // Internal methods 00091 // ------------------------------------------------------------ 00092 00093 // --- Internal new-line function makes sure that the offset 00094 // is reset; 00095 00096 void output_context::_new_line() 00097 { 00098 _out << endl; 00099 00100 _last = '\n'; 00101 00102 _pos = 0; 00103 _line++; 00104 } 00105 00106 // --- Indent out by printing some spaces... 00107 00108 void output_context::_indent(const int num) 00109 { 00110 for (int i = 0; i < num; ++i) 00111 _out << ' '; 00112 00113 if (num > 0) 00114 _last = ' '; 00115 00116 _pos += num; 00117 } 00118 00119 // ------------------------------------------------------------ 00120 // Start a new line 00121 // ------------------------------------------------------------ 00122 00123 void output_context::new_line() 00124 { 00125 _new_line(); 00126 _indent(_depth * 2); 00127 } 00128 00129 // -- Check the current line length. If longer that the threshold, 00130 // insert a new-line and indent to the proper depth. 00131 00132 void output_context::continue_line() 00133 { 00134 if (pos() > wrap_width) { 00135 if (! _parens.empty()) { 00136 _new_line(); 00137 _indent(_parens.front()); 00138 } 00139 else 00140 new_line(); 00141 } 00142 } 00143 00144 // -- Add a space, if it's needed. That need is determined by looking 00145 // at the last character sent to output. 00146 00147 void output_context::space() 00148 { 00149 if ((_last != ' ') && 00150 (_last != '\n') && 00151 (_last != '{') && 00152 (_last != '(')) { 00153 _out << ' '; 00154 _last = ' '; 00155 _pos++; 00156 } 00157 } 00158 00159 00160 // pnav 00161 // remember a suespecNode so it is not printed again 00162 void output_context::printed(suespecNode * ssn) { 00163 _ssNodes.insert(ssn); 00164 } 00165 00166 // pnav 00167 // return whther a suespecNode has been printed 00168 bool output_context::isPrinted(suespecNode * ssn) { 00169 return (_ssNodes.find(ssn) != _ssNodes.end()); 00170 }