public static IEnumerable <IDelimitedLine> ReadLines(TextReader reader, IDelimitedFileSettings settings)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
try
{
var number = settings.IsFirstRowHeaders ? 0 : -1;
while (reader.Peek() > -1)
{
number++;
yield return(ReadLine(number, reader.ReadLine(), settings));
}
}
finally
{
if (reader != null)
{
reader.Close();
}
}
}
public static IEnumerable <IDelimitedLine> ReadLines(string path, IDelimitedFileSettings settings)
{
Throw.IfNullOrWhiteSpace(path, nameof(path));
Throw.IfNull(settings, nameof(settings));
if (!File.Exists(path))
{
throw new FileNotFoundException(nameof(path));
}
using (var streamReader = new StreamReader(path))
{
return(ReadLines(streamReader, settings));
}
}
public static IEnumerable <IDelimitedLine> ReadLines(string path, IDelimitedFileSettings settings)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentException("Cannot be null, empty or only whitespace.", nameof(path));
}
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
if (!File.Exists(path))
{
throw new FileNotFoundException(nameof(path));
}
using (var streamReader = new StreamReader(path))
{
return(ReadLines(streamReader, settings));
}
}
public static IEnumerable <IDelimitedLine> ReadLines(TextReader reader, IDelimitedFileSettings settings)
{
Throw.IfNull(reader, nameof(reader));
Throw.IfNull(settings, nameof(settings));
try
{
var number = 0;
while (reader.Peek() > -1)
{
yield return(ReadLine(++number, reader.ReadLine(), settings));
}
}
finally
{
if (reader != null)
{
reader.Close();
}
}
}
internal static IDelimitedLine ReadLine(int number, string line, IDelimitedFileSettings settings)
{
if (number < 0)
{
throw new ArgumentOutOfRangeException(nameof(number), "Must be greater then 0.");
}
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
var fields = new List <IDelimitedField>();
var fieldCount = 0;
var chars = line == null ? new char[] { } : line.ToCharArray();
var buffer = new StringBuilder();
var inQuotes = false;
for (var i = 0; i < chars.Length; i++)
{
if (inQuotes)
{
var nextChar = (i + 1) == chars.Length ? chars[i] : chars[i + 1];
if (chars[i] == '"' && nextChar == settings.DelimitingCharacter ||
chars[i] == '"' && nextChar == chars[i] && (i + 1) == chars.Length ||
chars[i] == '"' && Environment.NewLine.Contains(nextChar.ToString()))
{
fieldCount++;
fields.Add(new DelimitedField(fieldCount, buffer.ToString(), inQuotes));
buffer = new StringBuilder();
inQuotes = false;
}
else
{
buffer.Append(chars[i]);
}
}
else
{
if (chars[i] == settings.DelimitingCharacter)
{
var prevChar = i == 0 ? chars[i] : chars[i - 1];
if (buffer.Length > 0 || prevChar == settings.DelimitingCharacter)
{
fieldCount++;
fields.Add(new DelimitedField(fieldCount, buffer.ToString()));
buffer = new StringBuilder();
}
continue;
}
else if (Environment.NewLine.Contains(chars[i].ToString()))
{
break;
}
else if (chars[i] == '"' && buffer.Length == 0)
{
inQuotes = true;
}
else
{
buffer.Append(chars[i]);
}
}
}
var lastChar = chars.Length == 0 ? default(char) : chars[chars.Length - 1];
if (buffer.Length > 0 || lastChar == settings.DelimitingCharacter)
{
fieldCount++;
fields.Add(new DelimitedField(fieldCount, buffer.ToString()));
}
return(new DelimitedLine(number, fields));
}
