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//////////////////////////////////////////////////////////////////////////
//
// pgAdmin III - PostgreSQL Tools
//
// Copyright (C) 2002 - 2014, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
// csvfiles.cpp - CSV file parsing
//
//////////////////////////////////////////////////////////////////////////
#include "pgAdmin3.h"
#include "utils/sysLogger.h"
#include "utils/csvfiles.h"
// PostgreSQL and GPDB now support CSV format logs.
// So, we need a way to parse the CSV files into lines, and lines into tokens (fields).
bool CSVTokenizer::HasMoreTokens() const
{
if ( m_string.length() > 0)
{
if ( m_pos >= m_string.length())
return false;
if ( m_string.find_first_not_of(wxT(','), m_pos) != wxString::npos )
// there are non delimiter characters left, so we do have more tokens
return true;
if (m_string[m_pos] == wxT('\n'))
return false;
}
return m_pos == 0 && !m_string.empty();
}
wxString CSVTokenizer::GetNextToken()
{
wxString token;
if ( !HasMoreTokens() )
return token;
// skip leading blanks if not quoted.
while (m_pos < m_string.length() && m_string[m_pos] == wxT(' '))
m_pos ++;
// Are we a quoted field? Must handle this special.
bool quoted_string = (m_string[m_pos] == wxT('\"'));
bool inquote = false;
size_t pos = m_pos;
// find the end of this token.
for (; pos < m_string.length(); pos++)
{
if (quoted_string && m_string[pos] == wxT('\"'))
inquote = !inquote;
if (!inquote)
{
// Check to see if we have found the end of this token.
// Tokens normally end with a ',' delimiter.
if (m_string[pos] == wxT(','))
break;
// Last token is delimited by '\n' or by end of string.
if (m_string[pos] == wxT('\n') && pos == m_string.length() - 1)
break;
}
}
if (quoted_string && !inquote)
{
token.assign(m_string, m_pos + 1, pos - m_pos - 2); // Remove leading and trailing quotes
// Remove double doublequote chars, replace with single doublequote chars
token.Replace(wxT("\"\""), wxT("\""), true);
}
else
token.assign(m_string, m_pos, pos - m_pos);
if (quoted_string && inquote)
{
wxLogNotice(wxT("unterminated double quoted string: %s\n"), token.c_str());
}
m_pos = pos + 1; // Skip token and delimiter
if (m_pos > m_string.length()) // Perhaps no delimiter if at end of string if orig string didn't have '\n'.
m_pos = m_string.length();
return token;
}
bool CSVLineTokenizer::HasMoreLines() const
{
if ( m_string.find_first_not_of(wxT('\n'), m_pos) != wxString::npos )
// there are non line-end characters left, so we do have more lines
return true;
return false;
}
wxString CSVLineTokenizer::GetNextLine(bool &partial)
{
wxString token;
partial = true;
if ( !HasMoreLines() )
return token;
// find the end of this line. CSV lines end in "\n", but
// CSV lines may have "\n" chars inside double-quoted strings, so we need to find that out.
bool inquote = false;
for (size_t pos = m_pos; pos < m_string.length(); pos++)
{
if (m_string[pos] == wxT('\"'))
inquote = !inquote;
if (m_string[pos] == wxT('\n') && !inquote)
{
// Good, we found a complete log line terminated
// by "\n", and the "\n" wasn't in a quoted string.
size_t len = pos - m_pos + 1; // return the line, including the trailing "\n"
token.assign(m_string, m_pos, len);
m_pos = pos + 1; // point to next line.
partial = false;
return token;
}
}
// no more delimiters, so the line is everything till the end of
// string, but we don't have all of the CSV the line... Some must still be coming.
token.assign(m_string, m_pos, wxString::npos);
partial = true;
m_pos = m_string.length();
return token;
}
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