67 lines
1.1 KiB
C++
67 lines
1.1 KiB
C++
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#include "textfilereader.hh"
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#include "posexcept.hh"
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using namespace std ;
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/* *** Constructors *** */
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/**
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* @param _file_name The name of the file to open.
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* @throw error_opening_input_file if the file cannot be opened.
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*/
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TextFileReader::TextFileReader(const string &_file_name):
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file_name(_file_name)
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{
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file.open(file_name.c_str()) ;
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if (! file)
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throw error_opening_input_file(file_name) ;
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}
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TextFileReader::~TextFileReader()
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{
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file.close() ;
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}
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/* *** Operations *** */
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/**
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* @return The string read, or an empty string in case of error.
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*/
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bool TextFileReader::read_line(string &text)
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{
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if (eof_close())
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return false ;
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getline(file, text) ;
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return true ;
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}
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/**
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* Tests if #file is opened and there is something more to
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* read. If the end of file is reached, the stream is closed.
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* @return \em true if the end of file is reached or if the file is
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* already closed.
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* @return \em false if there is something more to read.
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*/
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bool TextFileReader::eof_close()
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{
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if (file)
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return false ;
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if (file.eof())
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{
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file.close() ;
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return true ;
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}
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return false ;
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}
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