|
public static TryAppendChar ( |
||
| formatter | Formatter which has requested character to be appended. | |
| sb | StringBuilder | String builder to which string should be appended. |
| c | char | Character which should be appended. |
| success | bool | /// Indicates whether appending operations this far have been successful (true) /// or some of the previous append operations has already failed (false). If false, appending will not be attempted. /// |
| maxLength | int | /// On input contains maximum number of characters that are allowed to be appended to the string builder. /// On output indicates remaining character positions allowed before appending will fail. /// |
| return | bool | |
/// <summary>
/// Appends formatted string to the given string builder. String will be fully escaped.
/// </summary>
/// <param name="sb">String builder to which string should be appended.</param>
/// <param name="s">String which should be formatted and appended to the string builder.</param>
/// <param name="quote">Indicates whether formatted string should be enclosed in double quotation marks (true) or not (false).</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting will fail (and return false)
/// if this number of characters is breached. Multi-lined formatters will ignore this parameter.
/// Negative value indicates that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
private bool FormatString(StringBuilder sb, string s, bool quote, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (quote)
{
success = FormatInfoUtils.TryAppendChar(this, sb, '"', success, ref maxLength);
}
for (var i = 0; success && i < s.Length; i++)
{
success = FormatChar(sb, s[i], false, true, ref maxLength);
}
if (quote)
{
success = FormatInfoUtils.TryAppendChar(this, sb, '"', success, ref maxLength);
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Formats user friendly representation of the name of the given matrix or jagged array type.
/// </summary>
/// <param name="type">Type for which user friendly representation of the name is required.</param>
/// <param name="instance">
/// Instance for which friendly type name is appended.
/// This argument is used to gather additional information which might not be available from the type information.
/// This argument may be null if instance is not available.
/// </param>
/// <param name="sb">
/// String builder to which user friendly representation of the name of <paramref name="type" /> is appended.
/// If <paramref name="type" /> is null then nothing is appended to this string builder.
/// </param>
/// <param name="maxLength">
/// Maximum number of characters allowed to this method to append to string builder. Negative value indicates
/// unlimited number of characters allowed. Method fails and returns false if it could not perform the task within given number of
/// characters.
/// On output contains remaining number of characters allowed.
/// </param>
/// <returns>
/// true if method has successfully appended friendly name of the data type within given number of characters allowed; otherwise
/// false.
/// </returns>
internal override bool AppendFriendlyTypeName(Type type, object instance, StringBuilder sb, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (type != null)
{
var elementType = GetElementType(type);
if (elementType != null)
{
var sfi = new ScalarFormatInfo();
success = success && sfi.AppendFriendlyTypeName(elementType, null, sb, ref maxLength);
}
}
var rows = 0;
var lowCols = 0;
var highCols = 0;
if (instance != null)
{
GetDimensions((Array)instance, out rows, out lowCols, out highCols);
}
success = FormatInfoUtils.TryAppendChar(this, sb, '[', success, ref maxLength);
if (instance != null)
{
success = FormatInfoUtils.TryAppendString(this, sb, rows.ToString("0"), success, ref maxLength);
}
success = FormatInfoUtils.TryAppendChar(this, sb, ']', success, ref maxLength);
success = FormatInfoUtils.TryAppendChar(this, sb, '[', success, ref maxLength);
if (instance != null)
{
success = FormatInfoUtils.TryAppendString(this, sb, lowCols.ToString("0"), success, ref maxLength);
if (highCols != lowCols)
{
success = FormatInfoUtils.TryAppendChar(this, sb, '-', success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, highCols.ToString("0"), success, ref maxLength);
}
}
success = FormatInfoUtils.TryAppendChar(this, sb, ']', success, ref maxLength);
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Formats friendly representation of the name of the given type.
/// </summary>
/// <param name="type">Type for which friendly representation of the name is required.</param>
/// <param name="instance">
/// Instance for which friendly type name is appended.
/// This argument is used to gather additional information which might not be available
/// from the type information. This argument may be null if instance is not available.
/// </param>
/// <param name="sb">
/// String builder to which friendly name of <paramref name="type" /> is appended.
/// If <paramref name="type" /> is null then nothing is appended to this string builder.
/// </param>
/// <param name="maxLength">
/// Maximum number of characters allowed to this method
/// to append to string builder. Negative value indicates unlimited number of characters allowed.
/// Method fails and returns false if it could not perform the task within given number
/// of characters. On output contains remaining number of characters allowed.
/// </param>
/// <returns>
/// true if method has successfully appended friendly name of the data type
/// within given number of characters allowed; otherwise false.
/// </returns>
internal override bool AppendFriendlyTypeName(Type type, object instance, StringBuilder sb, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (type != null)
{
type = type.GetElementType(); // For arrays print element type rather than array type
}
if (success)
{
var sfi = new ScalarFormatInfo(this);
success = sfi.AppendFriendlyTypeName(type, null, sb, ref maxLength);
// Use scalar format info because it can write simple data types in a more compact way
}
// Now append dimensions of the array
// If instance is null then dimensions cannot be determined and braces will remain empty, like int[].
// Otherwise, if instance is present, dimensions will be fully shown, like int[3, 4, 2] in case of three-dimensional array.
success = FormatInfoUtils.TryAppendChar(this, sb, '[', success, ref maxLength);
if (instance != null)
{
var dimensions = GetDimensions(instance);
for (var i = 0; success && i < dimensions.Length; i++)
{
if (i > 0)
{
success = FormatInfoUtils.TryAppendString(this, sb, ", ", success, ref maxLength);
}
success = FormatInfoUtils.TryAppendString(this, sb, dimensions[i].ToString("0"), success, ref maxLength);
}
}
success = FormatInfoUtils.TryAppendChar(this, sb, ']', success, ref maxLength);
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Converts the value of a specified object to an equivalent string representation using
/// specified format and culture-specific formatting information.
/// </summary>
/// <param name="sb">String builder to which formatted string should be appended.</param>
/// <param name="format">A format string containing formatting specifications.</param>
/// <param name="arg">An object to format.</param>
/// <param name="formatProvider">An object that supplies format information about the current instance.</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting will fail (and return false)
/// if this number of characters is breached. Multi-lined formatters will ignore this parameter.
/// Negative value indicates that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
internal override bool Format(StringBuilder sb, string format, object arg, IFormatProvider formatProvider, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (PushCurrentObject(arg))
{
if (ShowDataType)
{
var instanceType = GetInstanceType(arg);
success = success && AppendFriendlyTypeName(instanceType, arg, sb, ref maxLength);
}
if (sb.Length > originalLength)
{
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
}
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
if (arg != null)
{
IncIndentationLevel(true);
var array = (Array)arg;
var rows = array.GetLength(0);
var cafi = new CompactArrayFormatInfo(this);
cafi.ShowItemsOnly = true;
cafi.FieldLength = GetMaxValueLength(array);
var rowNumberFormatProvider = new ScalarFormatInfo(VerboseFormatInfo.SingleLinedFormat);
rowNumberFormatProvider.ShowDataType = false;
rowNumberFormatProvider.ShowInstanceName = false;
if (IsMultiLinedFormat)
{
rowNumberFormatProvider.FieldLength = rowNumberFormatProvider.GetValueLength(rows);
}
for (var i = 0; i < rows; i++)
{
if (i == rows - 1)
{
DecIndentationLevel();
IncIndentationLevel(false); // There are no more rows in the matrix
cafi.DecIndentationLevel();
cafi.IncIndentationLevel(false);
}
success = success && FormatLinePrefix(sb, true, i == rows - 1, false, 0, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, "Row ", success, ref maxLength);
success = success && rowNumberFormatProvider.Format(sb, null, i, rowNumberFormatProvider, ref maxLength);
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
// Now we should append row content, which is obtained differently in case of matrix and in case of jagged array
if (array.Rank == 1)
{
// Array is jagged
var row = (Array)array.GetValue(i);
cafi.ShowLastDimension = false;
success = success && cafi.Format(sb, null, row, cafi, ref maxLength);
}
else
{
// Array is a matrix
cafi.HeadingIndices = new[] { i };
cafi.ShowLastDimension = true;
success = success && cafi.Format(sb, null, array, cafi, ref maxLength);
cafi.HeadingIndices = null;
}
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
}
DecIndentationLevel();
}
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
PopCurrentObject();
}
else
{
success = success && FormatInfoUtils.ReportInfiniteLoop(sb, arg, InstanceName, ref maxLength);
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Appends all fields that should be placed before next contained value is appended to the output.
/// In single-lined formats that will only be the field delimiter.
/// In multi-lined formats that may include indentation strings.
/// </summary>
/// <param name="sb">
/// String builder which ends with a field after which strings that are used to
/// delimit successive fields should be appended.
/// </param>
/// <param name="firstValueFollows">
/// Indicates whether next value to be formatted is the first contained value
/// under the current instance (true) or other fields at the same level have already been appended to the output (false).
/// </param>
/// <param name="lastValueFollows">
/// Indicates whether next value is the last one (true) or there are more values to follow (false).
/// Ignored if this format provider is single-lined.
/// </param>
/// <param name="skipRightMostIndentationString">
/// Indicates whether right-most indentation string should be replaced with normal indentation string
/// (true) or not (false). This stands for last right most indentation string as well.
/// </param>
/// <param name="padLineToLength">
/// Indicates required length of the line in multi-lined formats. If string created by applying
/// all prefixes and delimiters is shorter than this value then it is right-padded with blank spaces until this length is reached.
/// </param>
/// <param name="maxLength">
/// Maximum number of characters allowed to be appended to string builder by this function.
/// Negative value indicates unlimited number. If this function cannot fit the content into this number of characters
/// then it fails and returns false. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if function has successfully appended specified content to the string builder without breaching the allowed
/// number of characters specified by parameter <paramref name="maxLength" />; otherwise false.
/// </returns>
internal bool FormatLinePrefix(StringBuilder sb, bool firstValueFollows, bool lastValueFollows, bool skipRightMostIndentationString,
int padLineToLength, ref int maxLength)
{
var originalLength = sb.Length;
var success = true;
if (firstValueFollows && _isMultiLinedFormat)
{
success = FormatInfoUtils.TryAppendString(this, sb, Environment.NewLine, success, ref maxLength);
}
else if (!firstValueFollows)
{
success = FormatInfoUtils.TryAppendString(this, sb, _fieldDelimiter, success, ref maxLength);
}
if (_isMultiLinedFormat)
{
success = FormatInfoUtils.TryAppendString(this, sb, _linePrefix, success, ref maxLength);
for (var i = 0; success && i < IndentationLevel; i++)
{
string indentString = null;
string lastIndentString = null;
if (IsIndentationLevelOccupied(i + 1))
{
indentString = IndentationString;
lastIndentString = LastIndentationString;
}
else
{
indentString = string.Empty;
for (var j = 0; j < IndentationString.Length; j++)
{
if (IndentationString[j] == '\t')
{
indentString += '\t';
}
else
{
indentString += ' ';
}
}
lastIndentString = string.Empty;
for (var j = 0; j < LastIndentationString.Length; j++)
{
if (LastIndentationString[j] == '\t')
{
lastIndentString += '\t';
}
else
{
lastIndentString += ' ';
}
}
}
var rightMostIndentString = (skipRightMostIndentationString ? indentString : RightMostIndentationString);
var lastRightMostIndentString = (skipRightMostIndentationString ? lastIndentString : LastRightMostIndentationString);
if (lastValueFollows && i == IndentationLevel - 1)
{
success = FormatInfoUtils.TryAppendString(this, sb,
lastRightMostIndentString ?? lastIndentString ?? rightMostIndentString ?? indentString, success, ref maxLength);
}
else if (lastValueFollows)
{
success = FormatInfoUtils.TryAppendString(this, sb, lastIndentString ?? indentString, success, ref maxLength);
}
else if (i == IndentationLevel - 1)
{
success = FormatInfoUtils.TryAppendString(this, sb, rightMostIndentString ?? indentString, success, ref maxLength);
}
else
{
success = FormatInfoUtils.TryAppendString(this, sb, indentString, success, ref maxLength);
}
}
if (padLineToLength > 0)
{
var lineLength = GetCurrentLineLength(sb);
while (success && lineLength++ < padLineToLength)
{
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
}
}
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Converts the value of a specified object to an equivalent string representation using
/// specified format and culture-specific formatting information.
/// </summary>
/// <param name="sb">String builder to which formatted string should be appended.</param>
/// <param name="format">Format string containing formatting specifications.</param>
/// <param name="arg">An object to format.</param>
/// <param name="formatProvider">An object that supplies format information about the current instance.</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting will fail (and return false)
/// if this number of characters is breached. Multi-lined formatters will ignore this parameter.
/// Negative value indicates that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
internal override bool Format(StringBuilder sb, string format, object arg, IFormatProvider formatProvider, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (PushCurrentObject(arg))
{
if (ShowDataType)
{
success = success && AppendInstanceTypeName(arg, sb, ref maxLength);
}
if (!string.IsNullOrEmpty(InstanceName))
{
var name = string.Format("{0}{1}{2}={2}", sb.Length > originalLength ? " " : "", InstanceName, IsMultiLinedFormat ? " " : "");
success = FormatInfoUtils.TryAppendString(this, sb, name, success, ref maxLength);
}
else if (sb.Length > originalLength)
{
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
}
var argType = GetInstanceType(arg);
if (arg == null)
{
success = FormatInfoUtils.TryAppendString(this, sb, FormatInfoUtils.DefaultNullFormatted, success, ref maxLength);
}
else if (arg is char)
{
success = success && FormatChar(sb, (char)arg, true, false, ref maxLength);
}
else if (arg is string)
{
success = success && FormatString(sb, (string)arg, true, ref maxLength);
}
else if (arg is Boolean)
{
success = FormatInfoUtils.TryAppendString(this, sb, ((bool)arg) ? "true" : "false", success, ref maxLength);
}
else if (argType.IsEnum)
{
var plainName = Enum.GetName(argType, arg);
if (plainName != null)
{
success = FormatInfoUtils.TryAppendString(this, sb, plainName, success, ref maxLength);
}
else
{
success = success && AppendEnumFlags((Enum)arg, sb, ref maxLength); // arg is an OR-ed combination of values
}
}
else
{
success = FormatInfoUtils.TryAppendString(this, sb, arg.ToString(), success, ref maxLength);
}
while (success && sb.Length - originalLength < _fieldLength)
{
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
}
PopCurrentObject();
}
else
{
success = success && FormatInfoUtils.ReportInfiniteLoop(sb, arg, InstanceName, ref maxLength);
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Appends names of enumeration constants that are present in the OR-ed value.
/// </summary>
/// <param name="value">Enumeration value which is possibly a combination of multiple OR-ed values.</param>
/// <param name="sb">String builder to which enumeration value names should be appended.</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting will fail (and return false)
/// if this number of characters is breached. Multi-lined formatters will ignore this parameter.
/// Negative value indicates that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
private bool AppendEnumFlags(Enum value, StringBuilder sb, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
var enumType = value.GetType();
var underlyingType = Enum.GetUnderlyingType(enumType);
// The following code tries to recover flags in a flagged enum value
// in .NET 4.0 this can be done much easier using Enum.HasFlag instance-level method, but with some unpredictable outcomes
// e.g. if enumeration defines Left, Right and Both=Left | Right; then Both might be shown as Left | Right | Both which is avoided by this function
var isInt64 = false;
var isUint64 = false;
Int64 int64Value = 0;
UInt64 uint64Value = 0;
if (underlyingType == typeof(sbyte) || underlyingType == typeof(Int16) || underlyingType == typeof(Int32) ||
underlyingType == typeof(Int64))
{
isInt64 = true;
int64Value = ((IConvertible)value).ToInt64(null);
}
else if (underlyingType == typeof(byte) || underlyingType == typeof(UInt16) || underlyingType == typeof(UInt32) ||
underlyingType == typeof(UInt64))
{
isUint64 = true;
uint64Value = ((IConvertible)value).ToUInt64(null);
}
Int64 constructedInt64Value = 0;
UInt64 constructedUint64Value = 0;
var values = Enum.GetValues(enumType);
var constructionComplete = false;
var flags = new List <object>(); // Enumeration values that are incorporated in OR-ed value
foreach (var simpleValue in values)
{
if (isInt64)
{
var curInt64Value = ((IConvertible)simpleValue).ToInt64(null);
if ((int64Value & curInt64Value) == curInt64Value && (constructedInt64Value & curInt64Value) != curInt64Value)
{
// simpleValue is part of the resulting OR-ed value and is not included in currently constructed value (or is not completely included)
constructedInt64Value = constructedInt64Value | curInt64Value;
flags.Add(simpleValue);
if (constructedInt64Value == int64Value)
{
constructionComplete = true;
break;
}
}
}
else if (isUint64)
{
var curUint64Value = ((IConvertible)simpleValue).ToUInt64(null);
if ((uint64Value & curUint64Value) == curUint64Value && (constructedUint64Value & curUint64Value) != curUint64Value)
{
// simpleValue is part of the resulting OR-ed value and is not included in currently constructed value (or is not completely included)
constructedUint64Value = constructedUint64Value | curUint64Value;
flags.Add(simpleValue);
if (constructedUint64Value == uint64Value)
{
constructionComplete = true;
break;
}
}
}
}
if (!constructionComplete)
{
success = FormatInfoUtils.TryAppendString(this, sb, value.ToString(), success, ref maxLength);
// Append it as number or whatever Enum.ToString() makes out of this value
}
else
{
var isFirst = true;
foreach (var simpleValue in flags)
{
if (!isFirst)
{
success = FormatInfoUtils.TryAppendChar(this, sb, '+', success, ref maxLength);
}
isFirst = false;
success = FormatInfoUtils.TryAppendString(this, sb, Enum.GetName(enumType, simpleValue), success, ref maxLength);
if (!success)
{
break;
}
}
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Appends formatted string representing part of the array provided, starting from specific location within the array.
/// </summary>
/// <param name="sb">String builder to which formatted string will be appended.</param>
/// <param name="arg">Array which should be formatted into string which is appended to <paramref name="sb" />.</param>
/// <param name="indices">
/// List of index values for dimensions iterated this far. In every call, this method will continue
/// from location within the array indicated by this parameter.
/// </param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter.
/// Single-lined formatting will fail (and return false) if this number of characters is breached.
/// Multi-lined formatters ignore this parameter. Negative value indicates
/// that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
private bool RecursiveAppendDimension(StringBuilder sb, Array arg, List <int> indices, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
var dimension = arg.GetLength(indices.Count);
if (dimension > 0)
{
for (var i = 0; i < dimension; i++)
{
indices.Add(i);
IncIndentationLevel(i < dimension - 1);
success = success && FormatLinePrefix(sb, true, i == dimension - 1, false, 0, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, "Item[", success, ref maxLength);
var firstIndex = true;
foreach (var index in indices)
{
if (!firstIndex)
{
success = FormatInfoUtils.TryAppendString(this, sb, ", ", success, ref maxLength);
}
firstIndex = false;
success = FormatInfoUtils.TryAppendString(this, sb, index.ToString("0"), success, ref maxLength);
}
success = FormatInfoUtils.TryAppendString(this, sb, "] ", success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
if (indices.Count < arg.Rank)
{
success = success && RecursiveAppendDimension(sb, arg, indices, ref maxLength);
}
else
{
var value = arg.GetValue(indices.ToArray());
var vfi = new VerboseFormatInfo(this);
vfi.MaximumFormattedLength =
FormatInfoUtils.CombineMaxFormattedLengths(
RawMaximumFormattedLength,
FormatInfoUtils.DefaultMaxFormattedLength);
success = FormatInfoUtils.TryAppendChar(this, sb, ' ', success, ref maxLength);
success = success && vfi.Format(sb, null, value, vfi, ref maxLength);
}
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
DecIndentationLevel();
indices.RemoveAt(indices.Count - 1);
}
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Converts the value of a specified object to an equivalent string representation using
/// specified format and culture-specific formatting information.
/// </summary>
/// <param name="sb">String builder to which formatted string will be appended.</param>
/// <param name="format">Format string containing formatting specifications.</param>
/// <param name="arg">An object to format.</param>
/// <param name="formatProvider">An object that supplies format information about the current instance.</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting will fail (and return false)
/// if this number of characters is breached. Multi-lined formatters will ignore this parameter.
/// Negative value indicates that formatter has unlimited space available.
/// On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
internal override bool Format(StringBuilder sb, string format, object arg, IFormatProvider formatProvider, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (PushCurrentObject(arg))
{
if (ShowDataType)
{
success = success && AppendInstanceTypeName(arg, sb, ref maxLength);
}
if (ShowInstanceName && !string.IsNullOrEmpty(InstanceName))
{
success = FormatInfoUtils.TryAppendSpaceIfNeeded(this, sb, success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, InstanceName, success, ref maxLength);
if (IsMultiLinedFormat)
{
success = FormatInfoUtils.TryAppendString(this, sb, " = ", success, ref maxLength);
}
else
{
success = FormatInfoUtils.TryAppendChar(this, sb, '=', success, ref maxLength);
}
}
else
{
success = FormatInfoUtils.TryAppendSpaceIfNeeded(this, sb, success, ref maxLength);
}
if (arg == null)
{
success = FormatInfoUtils.TryAppendString(this, sb, FormatInfoUtils.DefaultNullFormatted, success, ref maxLength);
}
else
{
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
if (MaximumDepth > 0)
{
MaximumDepth--;
var members = ExtractMembers(arg);
var vfi = new VerboseFormatInfo(this);
vfi.ShowDataType = true;
vfi.ShowInstanceName = true;
for (var i = 0; success && i < members.Length; i++)
{
IncIndentationLevel(i < members.Length - 1);
vfi.IncIndentationLevel(i < members.Length - 1);
success = success && FormatLinePrefix(sb, i == 0, i == members.Length - 1, false, 0, ref maxLength);
vfi.InstanceDataType = members[i].DataType;
vfi.InstanceName = members[i].Name;
success = success && vfi.Format(sb, format, members[i].Value, vfi, ref maxLength);
vfi.DecIndentationLevel();
DecIndentationLevel();
}
MaximumDepth++;
}
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
}
PopCurrentObject();
}
else
{
success = success && FormatInfoUtils.ReportInfiniteLoop(sb, arg, InstanceName, ref maxLength);
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}
/// <summary>
/// Converts the value of a specified object to an equivalent string representation using
/// specified format and culture-specific formatting information.
/// </summary>
/// <param name="sb">String builder to which formatted string should be appended.</param>
/// <param name="format">A format string containing formatting specifications.</param>
/// <param name="arg">An object to format.</param>
/// <param name="formatProvider">An object that supplies format information about the current instance.</param>
/// <param name="maxLength">
/// Maximum number of characters allowed to the formatter. Formatting should fail (and return false)
/// if this number of characters is breached. Multi-lined formatters should ignore this parameter.
/// Negative value indicates that formatter has unlimited space available. On output contains remaining number of characters available.
/// </param>
/// <returns>
/// true if representation of <paramref name="arg" /> has been successfully appended to <paramref name="sb" />
/// within given number of allowed characters; otherwise false.
/// </returns>
internal override bool Format(StringBuilder sb, string format, object arg, IFormatProvider formatProvider, ref int maxLength)
{
var success = true;
var originalLength = sb.Length;
if (PushCurrentObject(arg))
{
if (arg == null)
{
success = FormatInfoUtils.TryAppendString(this, sb, FormatInfoUtils.DefaultNullFormatted, success, ref maxLength);
}
else
{
var keys = GetKeysCollection(arg);
var keyType = GetDeclaredKeyValueType(arg, true);
var valueType = GetDeclaredKeyValueType(arg, false);
var sfi = new ScalarFormatInfo(this);
success = success && sfi.AppendInstanceTypeName(arg, sb, ref maxLength);
// Using scalar format info to append type name ensures that scalar types will be
// represented with their short forms rather than CTS names which are less readable
if (!string.IsNullOrEmpty(InstanceName))
{
success = FormatInfoUtils.TryAppendSpaceIfNeeded(this, sb, success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, InstanceName, success, ref maxLength);
}
if (IsMultiLinedFormat)
{
success = FormatInfoUtils.TryAppendSpaceIfNeeded(this, sb, success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, "= ", success, ref maxLength);
}
else
{
success = FormatInfoUtils.TryAppendChar(this, sb, '=', success, ref maxLength);
}
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
if (MaximumDepth > 0)
{
MaximumDepth--;
var enumerator = keys.GetEnumerator();
var isFirstValue = true;
var key = new object[2];
var keyFetched = new bool[2];
keyFetched[0] = enumerator.MoveNext();
if (keyFetched[0])
{
key[0] = enumerator.Current;
keyFetched[1] = enumerator.MoveNext();
if (keyFetched[1])
{
key[1] = enumerator.Current;
}
}
VerboseFormatInfoBase containedItemsFormat = new VerboseFormatInfo(this);
var itemPos = 0;
while (keyFetched[0])
{
IncIndentationLevel(keyFetched[1]);
containedItemsFormat.IncIndentationLevel(keyFetched[1]);
success = success && FormatLinePrefix(sb, isFirstValue, !keyFetched[1], false, 0, ref maxLength);
isFirstValue = false;
success = FormatInfoUtils.TryAppendString(this, sb, "Item[", success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, itemPos.ToString("0"), success, ref maxLength);
itemPos++;
success = FormatInfoUtils.TryAppendString(this, sb, "] = ", success, ref maxLength);
success = FormatInfoUtils.TryAppendString(this, sb, FirstContainedValuePrefix, success, ref maxLength);
containedItemsFormat.IncIndentationLevel(true);
IncIndentationLevel(true);
success = success && FormatLinePrefix(sb, true, false, false, 0, ref maxLength);
containedItemsFormat.InstanceDataType = keyType;
containedItemsFormat.InstanceName = "Key";
success = success && containedItemsFormat.Format(sb, null, key[0], containedItemsFormat, ref maxLength);
DecIndentationLevel();
containedItemsFormat.DecIndentationLevel();
containedItemsFormat.IncIndentationLevel(false);
IncIndentationLevel(false);
var value = GetValue(arg, key[0]);
success = success && FormatLinePrefix(sb, false, true, false, 0, ref maxLength);
containedItemsFormat.InstanceDataType = valueType;
containedItemsFormat.InstanceName = "Value";
success = success && containedItemsFormat.Format(sb, null, value, containedItemsFormat, ref maxLength);
DecIndentationLevel();
containedItemsFormat.DecIndentationLevel();
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
key[0] = key[1];
keyFetched[0] = keyFetched[1];
if (keyFetched[0])
{
keyFetched[1] = enumerator.MoveNext();
if (keyFetched[1])
{
key[1] = enumerator.Current;
}
}
containedItemsFormat.DecIndentationLevel();
DecIndentationLevel();
}
MaximumDepth++;
} // if (MaximumDepth > 0)
success = FormatInfoUtils.TryAppendString(this, sb, LastContainedValueSuffix, success, ref maxLength);
}
PopCurrentObject();
}
else
{
success = success && FormatInfoUtils.ReportInfiniteLoop(sb, arg, InstanceName, ref maxLength);
}
if (!success)
{
sb.Length = originalLength;
}
return(success);
}