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Teuchos_FileInputStream.cpp
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41 
43 #include "Teuchos_Assert.hpp"
44 
45 using namespace Teuchos;
46 
47 FileInputStream::FileInputStream(const std::string& filename)
48  : XMLInputStream(), file_(std::fopen(filename.c_str(), "rb"))
49 {
50  TEUCHOS_TEST_FOR_EXCEPTION(file_ == NULL,
51  std::runtime_error,
52  "FileInputStream ctor failed to open file: "
53  << filename);
54 }
55 
56 unsigned int FileInputStream::readBytes(unsigned char* const toFill,
57  const unsigned int maxToRead)
58 {
59  if (
60 #if defined(ICL) || defined(__sgi)
61  feof(file_)
62 #else
63  std::feof(file_)
64 #endif
65  )
66  return (size_t)0;
67  int n = std::fread((void*) toFill, sizeof(char), maxToRead, file_);
68  if (n==0) return (size_t)0;
69 
70  const bool
71  is_eof
72 #if defined(ICL) || defined(__sgi)
73  = feof(file_)
74 #else
75  = std::feof(file_)
76 #endif
77  ;
78 
80  n < 0 || (n<(int) maxToRead && !is_eof),
81  std::runtime_error,
82  "FileInputStream::readBytes error"
83  );
84 
85  return (size_t) n;
86 }
87 
88 // 2007/07/08: rabartl: Above, for some reason the header <cstdio> on the
89 // Intel C++ compiler 8.0 for Windows XP just does not have the function
90 // feof(...) in the correct std namespace. On this compiler, you just have to
91 // access it from the global namespace.
#define TEUCHOS_TEST_FOR_EXCEPTION(throw_exception_test, Exception, msg)
Macro for throwing an exception with breakpointing to ease debugging.
XMLInputStream represents an XML input stream that can be used by a XMLInputSource.
FileInputStream(const std::string &filename)
Construct with a filename.
virtual unsigned int readBytes(unsigned char *const toFill, const unsigned int maxToRead)
Read up to maxToRead bytes.
Definition of XMLInputStream derived class for reading XML from a file.