OSX/libsecurity_codesigning/antlr2/src/CharBuffer.cpp

   1 /* ANTLR Translator Generator
   2  * Project led by Terence Parr at http://www.jGuru.com
   3  * Software rights: http://www.antlr.org/license.html
   4  *
   5  * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/src/CharBuffer.cpp#2 $
   6  */
   7
   8 #include "antlr/CharBuffer.hpp"
   9 //#include <iostream>
  10
  11 //#include <ios>
  12
  13 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  14 namespace antlr {
  15 #endif
  16
  17 /* RK: Per default istream does not throw exceptions. This can be
  18  * enabled with:
  19  * stream.exceptions(ios_base::badbit|ios_base::failbit|ios_base::eofbit);
  20  *
  21  * We could try catching the bad/fail stuff. But handling eof via this is
  22  * not a good idea. EOF is best handled as a 'normal' character.
  23  *
  24  * So this does not work yet with gcc... Comment it until I get to a platform
  25  * that does..
  26  */
  27
  28 /** Create a character buffer. Enable fail and bad exceptions, if supported
  29  * by platform. */
  30 CharBuffer::CharBuffer(ANTLR_USE_NAMESPACE(std)istream& input_)
  31 : input(input_)
  32 {
  33 //      input.exceptions(ANTLR_USE_NAMESPACE(std)ios_base::badbit|
  34 //                                                ANTLR_USE_NAMESPACE(std)ios_base::failbit);
  35 }
  36
  37 /** Get the next character from the stream. May throw CharStreamIOException
  38  * when something bad happens (not EOF) (if supported by platform).
  39  */
  40 int CharBuffer::getChar()
  41 {
  42 //      try {
  43     int i = input.get();
  44
  45     if (i == -1) {
  46         // pass through EOF
  47         return -1;
  48     }
  49
  50     // prevent negative-valued characters through sign extension of high-bit characters
  51     return static_cast<int>(static_cast<unsigned char>(i));
  52 //      }
  53 //      catch (ANTLR_USE_NAMESPACE(std)ios_base::failure& e) {
  54 //              throw CharStreamIOException(e);
  55 //      }
  56 }
  57
  58 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  59 }
  60 #endif