// Format formats src HCL and returns the result.
public static slice <byte> Format(slice <byte> src)
{
var node = Parser.Parse(src);
var buf = new GoBuffer();
DefaultConfig.Fprint(buf, node);
// Add trailing newline to result
buf.WriteString("\n");
return(buf.Bytes());
}
/// New creates and initializes a new instance of Scanner using src as
/// its source content.
public static Scanner New(slice <byte> src)
{
// even though we accept a src, we read from a io.Reader compatible type
// (*bytes.Buffer). So in the future we might easily change it to streaming
// read.
var b = GoBuffer.NewBuffer(src);
var s = new Scanner
{
_buf = b,
_src = src,
};
// srcPosition always starts with 1
s._srcPos.Line = 1;
return(s);
}
public void TestPosition()
{
// create artifical source code
var buf = new GoBuffer();
foreach (var listName in orderedTokenLists)
{
foreach (var ident in tokenLists[listName])
{
buf.WriteString(string.Format("\t\t\t\t{0}\n", ident.text));
//fmt.Fprintf(buf, "\t\t\t\t%s\n", ident.text)
}
}
//System.IO.File.WriteAllText(@"C:\local\prj\bek\zyborg\Zyborg.HCL\test\Zyborg.HCL-tests\ScannerTests-out.txt", buf.Bytes().AsString());
var s = Scanner.New(buf.Bytes());
var pos = new Pos("", 4, 1, 5);
s.Scan();
foreach (var listName in orderedTokenLists)
{
foreach (var k in tokenLists[listName])
{
var curPos = s.TokPos;
// fmt.Printf("[%q] s = %+v:%+v\n", k.text, curPos.Offset, curPos.Column)
Assert.AreEqual(pos.Offset, curPos.Offset,
"offset = {0}, want {1} for {2}", curPos.Offset, pos.Offset, k.text);
Assert.AreEqual(pos.Line, curPos.Line,
"line = {0}, want {1} for {2}", curPos.Line, pos.Line, k.text);
Assert.AreEqual(pos.Column, curPos.Column,
"column = {0}, want {1} for {2}", curPos.Column, pos.Column, k.text);
pos.Offset += 4 + k.text.Length + 1; // 4 tabs + token bytes + newline
pos.Line += CountNewlines(k.text) + 1; // each token is on a new line
s.Scan();
}
}
// make sure there were no token-internal errors reported by scanner
Assert.AreEqual(0, s.ErrorCount);
}
/// objectItem returns the printable HCL form of an object item. An object type
/// starts with one/multiple keys and has a value. The value might be of any
/// type.
private slice <byte> ObjectItem(ObjectItem o)
{
//using (Defer.Call(() => un(trace(p, fmt.Sprintf("ObjectItem: %s", o.Keys[0].Token.Text)))))
{
var buf = new GoBuffer();
if (o.LeadComment != null)
{
foreach (var comment in o.LeadComment.List)
{
buf.WriteString(comment.Text);
buf.WriteByte(newline);
}
}
foreach (var(i, k) in o.Keys.Range())
{
buf.WriteString(k.Token.Text);
buf.WriteByte(blank);
// reach end of key
if (o.Assign.IsValid && (i == o.Keys.Length - 1) && (o.Keys.Length == 1))
{
buf.WriteString("=");
buf.WriteByte(blank);
}
}
buf.Write(this.Output(o.Val));
if ((o.Val.Pos().Line == o.Keys[0].Pos().Line) && (o.LineComment != null))
{
buf.WriteByte(blank);
foreach (var comment in o.LineComment.List)
{
buf.WriteString(comment.Text);
}
}
return(buf.Bytes());
}
}
/// diff compares a and b.
void Diff(string aname, string bname, slice <byte> a, slice <byte> b)
{
var buf = new GoBuffer(); // holding long error message
// compare lengths
if (a.Length != b.Length)
{
buf.WriteString($"\nlength changed: len({aname}) = {a.Length},"
+ " len({bname}) = {b.Length}");
}
// compare contents
var line = 1;
var offs = 1;
for (var i = 0; i < a.Length && i < b.Length; i++)
{
var ch = a[i];
if (ch != b[i])
{
buf.WriteString(string.Format("\n{0}:{1}:{2}: {3}", aname, line, i - offs + 1,
LineAt(a, offs)));
buf.WriteString(string.Format("\n{0}:{1}:{2}: {3}", bname, line, i - offs + 1,
LineAt(b, offs)));
buf.WriteString("\n\n");
break;
}
if (ch == '\n')
{
line++;
offs = i + 1;
}
}
if (buf.Len() > 0)
{
throw new IOException(buf.ToString());
}
}
/// list returns the printable HCL form of an list type.
private slice <byte> List(ListType l)
{
var buf = new GoBuffer();
buf.WriteString("[");
var longestLine = 0;
foreach (var item in l.List)
{
// for now we assume that the list only contains literal types
var lit = item as LiteralType;
if (lit != null)
{
var lineLen = lit.Token.Text.Length;
if (lineLen > longestLine)
{
longestLine = lineLen;
}
}
}
var insertSpaceBeforeItem = false;
var lastHadLeadComment = false;
foreach (var(i, item) in l.List.Range())
{
// Keep track of whether this item is a heredoc since that has
// unique behavior.
var heredoc = false;
var lit = item as LiteralType;
if (lit != null && lit.Token.Type == TokenType.HEREDOC)
{
heredoc = true;
}
if (item.Pos().Line != l.Lbrack.Line)
{
// multiline list, add newline before we add each item
buf.WriteByte(newline);
insertSpaceBeforeItem = false;
// If we have a lead comment, then we want to write that first
var leadComment = false;
lit = item as LiteralType;
if (lit != null && lit.LeadComment != null)
{
leadComment = true;
// If this isn't the first item and the previous element
// didn't have a lead comment, then we need to add an extra
// newline to properly space things out. If it did have a
// lead comment previously then this would be done
// automatically.
if (i > 0 && !lastHadLeadComment)
{
buf.WriteByte(newline);
}
foreach (var comment in lit.LeadComment.List)
{
buf.Write(this.Indent(comment.Text.AsByteSlice()));
buf.WriteByte(newline);
}
}
// also indent each line
var val = this.Output(item);
var curLen = val.Length;
buf.Write(this.Indent(val));
// if this item is a heredoc, then we output the comma on
// the next line. This is the only case this happens.
var comma = slice.From((byte)',');
if (heredoc)
{
buf.WriteByte(newline);
comma = this.Indent(comma);
}
buf.Write(comma);
lit = item as LiteralType;
if (lit != null && lit.LineComment != null)
{
// if the next item doesn't have any comments, do not align
buf.WriteByte(blank); // align one space
for (var ii = 0; ii < longestLine - curLen; ii++)
{
buf.WriteByte(blank);
}
foreach (var comment in lit.LineComment.List)
{
buf.WriteString(comment.Text);
}
}
var lastItem = i == l.List.Length - 1;
if (lastItem)
{
buf.WriteByte(newline);
}
if (leadComment && !lastItem)
{
buf.WriteByte(newline);
}
lastHadLeadComment = leadComment;
}
else
{
if (insertSpaceBeforeItem)
{
buf.WriteByte(blank);
insertSpaceBeforeItem = false;
}
// Output the item itself
// also indent each line
var val = this.Output(item);
var curLen = val.Length;
buf.Write(val);
// If this is a heredoc item we always have to output a newline
// so that it parses properly.
if (heredoc)
{
buf.WriteByte(newline);
}
// If this isn't the last element, write a comma.
if (i != l.List.Length - 1)
{
buf.WriteString(",");
insertSpaceBeforeItem = true;
}
lit = item as LiteralType;
if (lit != null && lit.LineComment != null)
{
// if the next item doesn't have any comments, do not align
buf.WriteByte(blank); // align one space
for (var ii = 0; ii < longestLine - curLen; ii++)
{
buf.WriteByte(blank);
}
foreach (var comment in lit.LineComment.List)
{
buf.WriteString(comment.Text);
}
}
}
}
buf.WriteString("]");
return(buf.Bytes());
}
private slice <byte> AlignedItems(slice <ObjectItem> items)
{
var buf = new GoBuffer();
// find the longest key and value length, needed for alignment
var longestKeyLen = 0; // longest key length
var longestValLen = 0; // longest value length
foreach (var item in items)
{
var key = item.Keys[0].Token.Text.Length;
var val = this.Output(item.Val).Length;
if (key > longestKeyLen)
{
longestKeyLen = key;
}
if (val > longestValLen)
{
longestValLen = val;
}
}
foreach (var(i, item) in items.Range())
{
if (item.LeadComment != null)
{
foreach (var comment in item.LeadComment.List)
{
buf.WriteString(comment.Text);
buf.WriteByte(newline);
}
}
foreach (var k in item.Keys)
{
var keyLen = k.Token.Text.Length;
buf.WriteString(k.Token.Text);
var ii = 0;
for (; ii < longestKeyLen - keyLen + 1; ii++)
{
buf.WriteByte(blank);
}
// reach end of key
if ((ii == item.Keys.Length - 1) && (item.Keys.Length == 1))
{
buf.WriteString("=");
buf.WriteByte(blank);
}
}
var val = this.Output(item.Val);
var valLen = val.Length;
buf.Write(val);
if ((item.Val.Pos().Line == item.Keys[0].Pos().Line) && (item.LineComment != null))
{
var ii = 0;
for (; ii < longestValLen - valLen + 1; ii++)
{
buf.WriteByte(blank);
}
foreach (var comment in item.LineComment.List)
{
buf.WriteString(comment.Text);
}
}
// do not print for the last item
if (i != items.Length - 1)
{
buf.WriteByte(newline);
}
}
return(buf.Bytes());
}
/// objectType returns the printable HCL form of an object type. An object type
/// begins with a brace and ends with a brace.
private slice <byte> ObjectType(ObjectType o)
{
//defer un(trace(p, "ObjectType"))
var buf = new GoBuffer();
buf.WriteString("{");
int index = 0;
Pos nextItem;
bool commented = false, newlinePrinted = false;
for (;;)
{
// Determine the location of the next actual non-comment
// item. If we're at the end, the next item is the closing brace
if (index != o.List.Items.Length)
{
nextItem = o.List.Items[index].Pos();
}
else
{
nextItem = o.Rbrace;
}
// Go through the standalone comments in the file and print out
// the comments that we should be for this object item.
foreach (var c in this.standaloneComments)
{
var printed = false;
var lastCommentPos = new Pos();
foreach (var comment in c.List)
{
// We only care about comments after the previous item
// we've printed so that comments are printed in the
// correct locations (between two objects for example).
// And before the next item.
if (comment.Pos().After(this.prev) && comment.Pos().Before(nextItem))
{
// If there are standalone comments and the initial newline has not
// been printed yet, do it now.
if (!newlinePrinted)
{
newlinePrinted = true;
buf.WriteByte(newline);
}
// add newline if it's between other printed nodes
if (index > 0)
{
commented = true;
buf.WriteByte(newline);
}
// Store this position
lastCommentPos = comment.Pos();
// output the comment itself
buf.Write(this.Indent(this.HeredocIndent(comment.Text.AsByteSlice())));
// Set printed to true to note that we printed something
printed = true;
/*
* if index != len(o.List.Items) {
* buf.WriteByte(newline) // do not print on the end
* }
*/
}
}
// Stuff to do if we had comments
if (printed)
{
// Always write a newline
buf.WriteByte(newline);
// If there is another item in the object and our comment
// didn't hug it directly, then make sure there is a blank
// line separating them.
if (!object.Equals(nextItem, o.Rbrace) && (nextItem.Line != lastCommentPos.Line + 1))
{
buf.WriteByte(newline);
}
}
}
if (index == o.List.Items.Length)
{
this.prev = o.Rbrace;
break;
}
// At this point we are sure that it's not a totally empty block: print
// the initial newline if it hasn't been printed yet by the previous
// block about standalone comments.
if (!newlinePrinted)
{
buf.WriteByte(newline);
newlinePrinted = true;
}
// check if we have adjacent one liner items. If yes we'll going to align
// the comments.
var aligned = slice <ObjectItem> .Empty;
foreach (var item in o.List.Items.Slice(index))
{
// we don't group one line lists
if (o.List.Items.Length == 1)
{
break;
}
// one means a oneliner with out any lead comment
// two means a oneliner with lead comment
// anything else might be something else
var cur = Lines(this.ObjectItem(item).AsString());
if (cur > 2)
{
break;
}
var curPos = item.Pos();
var nextPos = new Pos();
if (index != o.List.Items.Length - 1)
{
nextPos = o.List.Items[index + 1].Pos();
}
var prevPos = new Pos();
if (index != 0)
{
prevPos = o.List.Items[index - 1].Pos();
}
// fmt.Println("DEBUG ----------------")
// fmt.Printf("prev = %+v prevPos: %s\n", prev, prevPos)
// fmt.Printf("cur = %+v curPos: %s\n", cur, curPos)
// fmt.Printf("next = %+v nextPos: %s\n", next, nextPos)
if ((curPos.Line + 1) == nextPos.Line)
{
aligned = aligned.Append(item);
index++;
continue;
}
if ((curPos.Line - 1) == prevPos.Line)
{
aligned = aligned.Append(item);
index++;
// finish if we have a new line or comment next. This happens
// if the next item is not adjacent
if ((curPos.Line + 1) != nextPos.Line)
{
break;
}
continue;
}
break;
}
// put newlines if the items are between other non aligned items.
// newlines are also added if there is a standalone comment already, so
// check it too
if (!commented && (index != aligned.Length))
{
buf.WriteByte(newline);
}
if (aligned.Length >= 1)
{
this.prev = aligned[aligned.Length - 1].Pos();
var items = this.AlignedItems(aligned);
buf.Write(this.Indent(items));
}
else
{
this.prev = o.List.Items[index].Pos();
buf.Write(this.Indent(this.ObjectItem(o.List.Items[index])));
index++;
}
buf.WriteByte(newline);
}
buf.WriteString("}");
return(buf.Bytes());
}
/// output prints creates b printable HCL output and returns it.
private slice <byte> Output(object n)
{
var buf = new GoBuffer();
using (var defer = Defer.Call())
{
switch (n)
{
case File t:
// File doesn't trace so we add the tracing here
//defer.Add(() => un(trace(this, "File")));
return(Output(t.Node));
case ObjectList t:
//defer.Add(() => un(trace(p, "ObjectList")));
int index = 0;
for (;;)
{
// Determine the location of the next actual non-comment
// item. If we're at the end, the next item is at "infinity"
Pos nextItem;
if (index != t.Items.Length)
{
nextItem = t.Items[index].Pos();
}
else
{
nextItem = new Pos {
Offset = infinity, Line = infinity
};
}
// Go through the standalone comments in the file and print out
// the comments that we should be for this object item.
foreach (var c in this.standaloneComments)
{
// Go through all the comments in the group. The group
// should be printed together, not separated by double newlines.
var printed = false;
var newlinePrinted = false;
foreach (var comment in c.List)
{
// We only care about comments after the previous item
// we've printed so that comments are printed in the
// correct locations (between two objects for example).
// And before the next item.
if (comment.Pos().After(this.prev) && comment.Pos().Before(nextItem))
{
// if we hit the end add newlines so we can print the comment
// we don't do this if prev is invalid which means the
// beginning of the file since the first comment should
// be at the first line.
if (!newlinePrinted && this.prev.IsValid && index == t.Items.Length)
{
buf.Write(slice.From(newline, newline));
newlinePrinted = true;
}
// Write the actual comment.
buf.WriteString(comment.Text);
buf.WriteByte(newline);
// Set printed to true to note that we printed something
printed = true;
}
}
// If we're not at the last item, write a new line so
// that there is a newline separating this comment from
// the next object.
if (printed && index != t.Items.Length)
{
buf.WriteByte(newline);
}
}
if (index == t.Items.Length)
{
break;
}
buf.Write(this.Output(t.Items[index]));
if (index != t.Items.Length - 1)
{
// Always write a newline to separate us from the next item
buf.WriteByte(newline);
// Need to determine if we're going to separate the next item
// with a blank line. The logic here is simple, though there
// are a few conditions:
//
// 1. The next object is more than one line away anyways,
// so we need an empty line.
//
// 2. The next object is not a "single line" object, so
// we need an empty line.
//
// 3. This current object is not a single line object,
// so we need an empty line.
var current = t.Items[index];
var next = t.Items[index + 1];
if ((next.Pos().Line != t.Items[index].Pos().Line + 1) ||
!this.IsSingleLineObject(next) ||
!this.IsSingleLineObject(current))
{
buf.WriteByte(newline);
}
}
index++;
}
break;
case ObjectKey t:
buf.WriteString(t.Token.Text);
break;
case ObjectItem t:
this.prev = t.Pos();
buf.Write(this.ObjectItem(t));
break;
case LiteralType t:
buf.Write(this.LiteralType(t));
break;
case ListType t:
buf.Write(this.List(t));
break;
case ObjectType t:
buf.Write(this.ObjectType(t));
break;
default:
Console.WriteLine($"unknown type {n}");
break;
}
return(buf.Bytes());
}
}