public const string __doc__ = "";

public const string __version__ = "1.0";

public const int QUOTE_MINIMAL = 0;

public const int QUOTE_ALL = 1;

public const int QUOTE_NONNUMERIC = 2;

public const int QUOTE_NONE = 3;

private static readonly object _fieldSizeLimitKey = new object();

private static readonly object _dialectRegistryKey = new object();

private const int FieldSizeLimit = 128 * 1024; /* max parsed field size */

[SpecialName]

public static void PerformModuleReload(PythonContext context, PythonDictionary dict) {

if (!context.HasModuleState(_fieldSizeLimitKey)) {

context.SetModuleState(_fieldSizeLimitKey, FieldSizeLimit);

}

if (!context.HasModuleState(_dialectRegistryKey)) {

context.SetModuleState(_dialectRegistryKey,

new DialectRegistry());

}

InitModuleExceptions(context, dict);

}

public static int field_size_limit(CodeContext /*!*/ context, int new_limit) {

PythonContext ctx = context.LanguageContext;

int old_limit = (int)ctx.GetModuleState(_fieldSizeLimitKey);

ctx.SetModuleState(_fieldSizeLimitKey, new_limit);

return old_limit;

}

public static int field_size_limit(CodeContext/*!*/ context) {

return (int)context.LanguageContext.

GetModuleState(_fieldSizeLimitKey);

}

[Documentation(@"Create a mapping from a string name to a dialect class.

public static void register_dialect(CodeContext/*!*/ context,

[ParamDictionary] IDictionary<object, object> kwArgs,

params object[] args) {

string name = null;

object dialectObj = null;

Dialect dialect = null;

if (args.Length < 1) {

throw PythonOps.TypeError("expected at least 1 arguments, got {0}",

args.Length);

}

if (args.Length > 2) {

throw PythonOps.TypeError("expected at most 2 arguments, got {0}",

args.Length);

}

name = args[0] as string;

if (name == null) {

throw PythonOps.TypeError(

"dialect name must be a string or unicode");

}

if (args.Length > 1)

dialectObj = args[1];

dialect = (dialectObj != null) ?

Dialect.Create(context, kwArgs, dialectObj) :

Dialect.Create(context, kwArgs);

if (dialect != null)

GetDialects(context)[name] = dialect;

}

/// <summary>

/// Returns the dialects from the code context.

/// </summary>

/// <param name="context"></param>

/// <returns></returns>

private static DialectRegistry GetDialects(CodeContext/*!*/ context) {

PythonContext ctx = context.LanguageContext;

if (!ctx.HasModuleState(_dialectRegistryKey)) {

ctx.SetModuleState(_dialectRegistryKey,

new DialectRegistry());

}

return (DialectRegistry)ctx.GetModuleState(_dialectRegistryKey);

}

private static int GetFieldSizeLimit(CodeContext/*!*/ context) {

PythonContext ctx = context.LanguageContext;

if (!ctx.HasModuleState(_fieldSizeLimitKey)) {

ctx.SetModuleState(_fieldSizeLimitKey, FieldSizeLimit);

}

return (int)ctx.GetModuleState(_fieldSizeLimitKey);

}

[Documentation(@"Delete the name/dialect mapping associated with a string name.\n

public static void unregister_dialect(CodeContext/*!*/ context, string name) {

DialectRegistry dialects = GetDialects(context);

if (name is not null && dialects.Remove(name)) return;

throw MakeError("unknown dialect");

}

[Documentation(@"Return the dialect instance associated with name.

public static object get_dialect(CodeContext/*!*/ context, string name) {

DialectRegistry dialects = GetDialects(context);

if (name is not null && dialects.TryGetValue(name, out var value)) return value;

throw MakeError("unknown dialect");

}

[Documentation(@"Return a list of all know dialect names

public static PythonList list_dialects(CodeContext/*!*/ context) {

return new PythonList(GetDialects(context).Keys);

}

[Documentation(@"csv_reader = reader(iterable [, dialect='excel']

public static object reader(CodeContext/*!*/ context,

[ParamDictionary] IDictionary<object, object> kwArgs,

params object[] args) {

object dialectObj = null;

Dialect dialect = null;

IEnumerator e = null;

DialectRegistry dialects = GetDialects(context);

if (args.Length < 1) {

throw PythonOps.TypeError(

"expected at least 1 arguments, got {0}",

args.Length);

}

if (args.Length > 2) {

throw PythonOps.TypeError(

"expected at most 2 arguments, got {0}",

args.Length);

}

if (!PythonOps.TryGetEnumerator(context, args[0], out e)) {

throw PythonOps.TypeError("argument 1 must be an iterator");

}

if (args.Length > 1)

dialectObj = args[1];

if (dialectObj is string && !dialects.ContainsKey((string)dialectObj))

throw MakeError("unknown dialect");

else if (dialectObj is string) {

dialect = dialects[(string)dialectObj];

dialectObj = dialect;

}

dialect = dialectObj != null ?

Dialect.Create(context, kwArgs, dialectObj) :

Dialect.Create(context, kwArgs);

return new Reader(context, e, dialect);

}

public static object writer(CodeContext/*!*/ context,

[ParamDictionary] IDictionary<object, object> kwArgs,

params object[] args) {

object output_file = null;

object dialectObj = null;

Dialect dialect = null;

DialectRegistry dialects = GetDialects(context);

if (args.Length < 1) {

throw PythonOps.TypeError("expected at least 1 arguments, got {0}",

args.Length);

}

if (args.Length > 2) {

throw PythonOps.TypeError("expected at most 2 arguments, got {0}",

args.Length);

}

output_file = args[0];

if (args.Length > 1)

dialectObj = args[1];

if (dialectObj is string && !dialects.ContainsKey((string)dialectObj))

throw MakeError("unknown dialect");

else if (dialectObj is string) {

dialect = dialects[(string)dialectObj];

dialectObj = dialect;

}

dialect = dialectObj != null ?

Dialect.Create(context, kwArgs, dialectObj) :

Dialect.Create(context, kwArgs);

return new Writer(context, output_file, dialect);

}

[Documentation(@"CSV dialect

[PythonType]

public class Dialect {

private string _delimiter = ",";

private string _escapechar = null;

private bool _skipinitialspace;

private bool _doublequote = true;

private bool _strict;

private int _quoting = QUOTE_MINIMAL;

private string _quotechar = "\"";

private string _lineterminator = "\r\n";

private static readonly string[] VALID_KWARGS = {

"dialect",

"delimiter",

"doublequote",

"escapechar",

"lineterminator",

"quotechar",

"quoting",

"skipinitialspace",

"strict"};

private Dialect() {

}

public static Dialect Create(CodeContext/*!*/ context,

[ParamDictionary] IDictionary<object, object> kwArgs,

params object[] args) {

object dialect = null;

object delimiter = null;

object doublequote = null;

object escapechar = null;

object lineterminator = null;

object quotechar = null;

object quoting = null;

object skipinitialspace = null;

object strict = null;

DialectRegistry dialects = GetDialects(context);

if (args.Length > 0 && args[0] != null)

dialect = args[0];

if (dialect == null)

kwArgs.TryGetValue("dialect", out dialect);

kwArgs.TryGetValue("delimiter", out delimiter);

kwArgs.TryGetValue("doublequote", out doublequote);

kwArgs.TryGetValue("escapechar", out escapechar);

kwArgs.TryGetValue("lineterminator", out lineterminator);

kwArgs.TryGetValue("quotechar", out quotechar);

kwArgs.TryGetValue("quoting", out quoting);

kwArgs.TryGetValue("skipinitialspace", out skipinitialspace);

kwArgs.TryGetValue("strict", out strict);

if (dialect != null) {

if (dialect is string dialectName) {

if (dialects.TryGetValue(dialectName, out var value))

dialect = value;

else

throw MakeError("unknown dialect");

}

if (dialect is Dialect &&

delimiter == null &&

doublequote == null &&

escapechar == null &&

lineterminator == null &&

quotechar == null &&

quoting == null &&

skipinitialspace == null &&

strict == null) {

return dialect as Dialect;

}

}

Dialect result = dialect != null ?

new Dialect(context, kwArgs, dialect) :

new Dialect(context, kwArgs);

return result;

}

[SpecialName]

public void DeleteMember(CodeContext/*!*/ context, string name) {

if (string.Equals(name, "delimiter") ||

string.Equals(name, "skipinitialspace") ||

string.Equals(name, "doublequote")||

string.Equals(name, "strict") ||

string.Equals(name, "escapechar") ||

string.Equals(name, "lineterminator") ||

string.Equals(name, "quotechar") ||

string.Equals(name, "quoting")) {

throw PythonOps.AttributeError("attribute '{0}' of " +

"'_csv.Dialect' objects is not writable", name);

} else {

throw PythonOps.AttributeError("'_csv.Dialect' object " +

"has no attribute '{0}'", name);

}

}

[SpecialName]

public void SetMember(CodeContext/*!*/ context, string name, object value) {

if (string.Equals(name, "delimiter") ||

string.Equals(name, "skipinitialspace") ||

string.Equals(name, "doublequote") ||

string.Equals(name, "strict") ||

string.Equals(name, "escapechar") ||

string.Equals(name, "lineterminator") ||

string.Equals(name, "quotechar") ||

string.Equals(name, "quoting")) {

throw PythonOps.AttributeError("attribute '{0}' of " +

"'_csv.Dialect' objects is not writable", name);

} else {

throw PythonOps.AttributeError("'_csv.Dialect' object " +

"has no attribute '{0}'", name);

}

}

#region Parameter Setting

private static int SetInt(string name, object src, bool found, int @default) {

int result = @default;

if (found) {

if (!(src is int)) {

throw PythonOps.TypeError("\"{0}\" must be an integer",

name);

}

result = (int)src;

}

return result;

}

private static bool SetBool(string name, object src, bool found, bool @default) {

bool result = @default;

if (found)

result = PythonOps.IsTrue(src);

return result;

}

private static string SetChar(string name, object src, bool found, string @default) {

string result = @default;

if (found) {

if (src == null)

result = null;

else if (src is string) {

string source = src as string;

if (source.Length == 0)

result = null;

else if (source.Length != 1) {

throw PythonOps.TypeError(

"\"{0}\" must be a 1-character string",

name);

} else

result = source.Substring(0, 1);

} else {

throw PythonOps.TypeError(

"\"{0}\" must be string, not {1}", name, PythonOps.GetPythonTypeName(src));

}

}

return result;

}

private static string SetString(string name, object src, bool found, string @default) {

string result = @default;

if (found) {

if (src == null)

result = null;

else if (!(src is string)) {

throw PythonOps.TypeError(

"\"{0}\" must be a string", name);

} else {

result = src as string;

}

}

return result;

}

#endregion

public Dialect(CodeContext/*!*/ context,

[ParamDictionary] IDictionary<object, object> kwArgs,

params object[] args) {

object dialect = null;

object delimiter = null;

object doublequote = null;

object escapechar = null;

object lineterminator = null;

object quotechar = null;

object quoting = null;

object skipinitialspace = null;

object strict = null;

Dictionary<string, bool> foundParams =

new Dictionary<string, bool>();

foreach (object key in kwArgs.Keys) {

if (Array.IndexOf(VALID_KWARGS, key) < 0) {

throw PythonOps.TypeError("'{0}' is an invalid " +

"keyword argument for this function", key);

}

}

if (args.Length > 0 && args[0] != null) {

dialect = args[0];

foundParams["dialect"] = true;

}

if (dialect == null) {

foundParams["dialect"] =

kwArgs.TryGetValue("dialect", out dialect);

}

foundParams["delimiter"] = kwArgs.TryGetValue("delimiter", out delimiter);

foundParams["doublequote"] = kwArgs.TryGetValue("doublequote", out doublequote);

foundParams["escapechar"] = kwArgs.TryGetValue("escapechar", out escapechar);

foundParams["lineterminator"] = kwArgs.TryGetValue("lineterminator", out lineterminator);

foundParams["quotechar"] = kwArgs.TryGetValue("quotechar", out quotechar);

foundParams["quoting"] = kwArgs.TryGetValue("quoting", out quoting);

foundParams["skipinitialspace"] = kwArgs.TryGetValue("skipinitialspace", out skipinitialspace);

foundParams["strict"] = kwArgs.TryGetValue("strict", out strict);

if (dialect != null) {

if (!foundParams["delimiter"] && delimiter == null)

foundParams["delimiter"] = PythonOps.TryGetBoundAttr(dialect, "delimiter", out delimiter);

if (!foundParams["doublequote"] && doublequote == null)

foundParams["doublequote"] = PythonOps.TryGetBoundAttr(dialect, "doublequote", out doublequote);

if (!foundParams["escapechar"] && escapechar == null)

foundParams["escapechar"] = PythonOps.TryGetBoundAttr(dialect, "escapechar", out escapechar);

if (!foundParams["lineterminator"] && lineterminator == null)

foundParams["lineterminator"] = PythonOps.TryGetBoundAttr(dialect, "lineterminator", out lineterminator);

if (!foundParams["quotechar"] && quotechar == null)

foundParams["quotechar"] = PythonOps.TryGetBoundAttr(dialect, "quotechar", out quotechar);

if (!foundParams["quoting"] && quoting == null)

foundParams["quoting"] = PythonOps.TryGetBoundAttr(dialect, "quoting", out quoting);

if (!foundParams["skipinitialspace"] && skipinitialspace == null)

foundParams["skipinitialspace"] = PythonOps.TryGetBoundAttr(dialect, "skipinitialspace", out skipinitialspace);

if (!foundParams["strict"] && strict == null)

foundParams["strict"] = PythonOps.TryGetBoundAttr(dialect, "strict", out strict);

}

_delimiter = SetChar("delimiter", delimiter,

foundParams["delimiter"], ",");

_doublequote = SetBool("doublequote", doublequote,

foundParams["doublequote"], true);

_escapechar = SetString("escapechar", escapechar,

foundParams["escapechar"], null);

_lineterminator = SetString("lineterminator",

lineterminator, foundParams["lineterminator"], "\r\n");

_quotechar = SetChar("quotechar", quotechar,

foundParams["quotechar"], "\"");

_quoting = SetInt("quoting", quoting,

foundParams["quoting"], QUOTE_MINIMAL);

_skipinitialspace = SetBool("skipinitialspace",

skipinitialspace, foundParams["skipinitialspace"], false);

_strict = SetBool("strict", strict, foundParams["strict"], false);

// validate options

if (_quoting < QUOTE_MINIMAL || _quoting > QUOTE_NONE)

throw PythonOps.TypeError("bad \"quoting\" value");

if (string.IsNullOrEmpty(_delimiter))

throw PythonOps.TypeError("\"delimiter\" must be a 1-character string");

if ((foundParams["quotechar"] && quotechar == null) && quoting == null)

_quoting = QUOTE_NONE;

if (_quoting != QUOTE_NONE && string.IsNullOrEmpty(_quotechar))

throw PythonOps.TypeError("quotechar must be set if quoting enabled");

if (_lineterminator == null)

throw PythonOps.TypeError("lineterminator must be set");

}

public string escapechar {

get { return _escapechar; }

}

public string delimiter {

get { return _delimiter; }

}

public bool skipinitialspace {

get { return _skipinitialspace; }

}

public bool doublequote {

get { return _doublequote; }

}

public string lineterminator {

get { return _lineterminator; }

}

public bool strict {

get { return _strict; }

}

public int quoting {

get { return _quoting; }

}

public string quotechar {

get { return _quotechar; }

}

}

[Documentation(@"CSV reader

[PythonType]

public class Reader : IEnumerable {

private IEnumerator _input_iter;

private Dialect _dialect;

private int _line_num;

private ReaderIterator _iterator;

public Reader(CodeContext/*!*/ context, IEnumerator input_iter,

Dialect dialect) {

_input_iter = input_iter;

_dialect = dialect;

_iterator = new ReaderIterator(context, this);

}

public object __next__() {

if (!_iterator.MoveNext())

throw PythonOps.StopIteration();

return _iterator.Current;

}

#region IEnumerable Members

public IEnumerator GetEnumerator() {

return _iterator;

}

private sealed class ReaderIterator : IEnumerator, IEnumerable {

private CodeContext _context;

private Reader _reader;

private PythonList _fields = new PythonList();

private bool _is_numeric_field;

private State _state = State.StartRecord;

private StringBuilder _field = new StringBuilder();

private IEnumerator _iterator;

private enum State {

StartRecord,

StartField,

EscapedChar,

InField,

InQuotedField,

EscapeInQuotedField,

QuoteInQuotedField,

EatCrNl

}

public ReaderIterator(CodeContext/*!*/ context, Reader reader) {

_context = context;

_reader = reader;

_iterator = _reader._input_iter;

}

#region IEnumerator Members

public object Current {

get { return new PythonList(_fields); }

}

public bool MoveNext() {

bool result = false;

Reset();

do {

object lineobj = null;

if (!_iterator.MoveNext()) {

// End of input OR exception

if (_field.Length > 0 || _state == State.InQuotedField) {

if (_reader._dialect.strict) {

throw MakeError("unexpected end of data");

} else {

ParseSaveField();

return true;

}

}

return false;

} else {

lineobj = _iterator.Current;

}

_reader._line_num++;

if (lineobj is char)

lineobj = lineobj.ToString();

if (!(lineobj is string)) {

throw MakeError("iterator should return strings, not "

+ PythonOps.GetPythonTypeName(lineobj) +

" (did you open the file in text mode?)");

}

string line = lineobj as string;

if (!string.IsNullOrEmpty(line)) {

for (int i = 0; i < line.Length; i++) {

char c = line[i];

if (c == '\0')

throw MakeError("line contains NULL byte");

ProcessChar(c);

}

// If we ended on an escaped newline, then we want to continue onto

// the nextline without processing the end of this one, as the newline

// is in the middle of the field.

if ((line.EndsWith('\n') || line.EndsWith('\r')) && _state == State.InField) {

continue;

}

}

ProcessChar('\0');

result = true;

} while (_state != State.StartRecord);

return result;

}

public void Reset() {

_state = State.StartRecord;

_fields.Clear();

_is_numeric_field = false;

_field.Clear();

}

#endregion

#region IEnumerable Members

public IEnumerator GetEnumerator() {

return this;

}

#endregion

private void ProcessChar(char c) {

Dialect dialect = _reader._dialect;

switch (_state) {

case State.StartRecord:

// start of record

if (c == '\0') {

// empty line, will return empty list

break;

} else if (c == '\n' || c == '\r') {

_state = State.EatCrNl;

break;

}

// normal character, handle as start of field

_state = State.StartField;

goto case State.StartField;

case State.StartField:

// expecting field

if (c == '\n' || c == '\r' || c == '\0') {

// save empty field - return [fields]

ParseSaveField();

_state = (c == '\0' ?

State.StartRecord : State.EatCrNl);

} else if (!string.IsNullOrEmpty(dialect.quotechar) &&

c == dialect.quotechar[0] &&

dialect.quoting != QUOTE_NONE) {

// start quoted field

_state = State.InQuotedField;

} else if (!string.IsNullOrEmpty(dialect.escapechar) &&

c == dialect.escapechar[0]) {

// possible escaped char

_state = State.EscapedChar;

} else if (c == ' ' && dialect.skipinitialspace) {

// ignore space at start of field

} else if (c == dialect.delimiter[0]) {

// save empty field

ParseSaveField();

} else {

// begin new unquoted field

if (dialect.quoting == QUOTE_NONNUMERIC)

_is_numeric_field = true;

ParseAddChar(c);

_state = State.InField;

}

break;

case State.EscapedChar:

if (c == '\0')

c = '\n';

ParseAddChar(c);

_state = State.InField;

break;

case State.InField:

// in unquoted field

if (c == '\n' || c == '\r' || c == '\0') {

// end of line, return [fields]

ParseSaveField();

_state = (c == '\0' ? State.StartRecord : State.EatCrNl);

} else if (!string.IsNullOrEmpty(dialect.escapechar) &&

c == dialect.escapechar[0]) {

// possible escaped character

_state = State.EscapedChar;

} else if (c == dialect.delimiter[0]) {

// save field - wait for new field

ParseSaveField();

_state = State.StartField;

} else {

// normal character - save in field

ParseAddChar(c);

}

break;

case State.InQuotedField:

// in quoted field

if (c == '\0') {

// ignore null character

} else if (!string.IsNullOrEmpty(dialect.escapechar) &&

c == dialect.escapechar[0]) {

// possible escape character

_state = State.EscapeInQuotedField;

} else if (!string.IsNullOrEmpty(dialect.quotechar) &&

c == dialect.quotechar[0] &&

dialect.quoting != QUOTE_NONE) {

if (dialect.doublequote) {

// doublequote; " represented by ""

_state = State.QuoteInQuotedField;

} else {

// end of quote part of field

_state = State.InField;

}

} else {

// normal character - save in field

ParseAddChar(c);

}

break;

case State.EscapeInQuotedField:

if (c == '\0')

c = '\n';

ParseAddChar(c);

_state = State.InQuotedField;

break;

case State.QuoteInQuotedField:

// doublequote - seen a quote in a quoted field

if (dialect.quoting != QUOTE_NONE &&

c == dialect.quotechar[0]) {

// save "" as "

ParseAddChar(c);

_state = State.InQuotedField;

} else if (c == dialect.delimiter[0]) {

// save field - wait for new field

ParseSaveField();

_state = State.StartField;

} else if (c == '\n' || c == '\r' || c == '\0') {

// end of line - return [fields]

ParseSaveField();

_state = (c == '\0' ? State.StartRecord : State.EatCrNl);

} else if (!dialect.strict) {

ParseAddChar(c);

_state = State.InField;

} else {