[valadoc] libvaladoc: migrate to new string api

[Florian Brosch <flobrosch src gnome org>]

commit 05898da628001474a1fbf925aa52039453dd867d
Author: Florian Brosch <flo brosch gmail com>
Date:   Mon Feb 14 00:47:43 2011 +0100

    libvaladoc: migrate to new string api

 src/libvaladoc/documentation/wikiscanner.vala |   35 +++++++++++++------------
 src/libvaladoc/errorreporter.vala             |    2 +-
 2 files changed, 19 insertions(+), 18 deletions(-)
---
diff --git a/src/libvaladoc/documentation/wikiscanner.vala b/src/libvaladoc/documentation/wikiscanner.vala
index 255fb60..9e1717c 100644
--- a/src/libvaladoc/documentation/wikiscanner.vala
+++ b/src/libvaladoc/documentation/wikiscanner.vala
@@ -30,9 +30,8 @@ public class Valadoc.WikiScanner : Object, Scanner {
 	private Parser _parser;
 
 	private string _content;
-	private int _index;
+	private unowned string _index;
 	private bool _stop;
-	private int _last_index;
 	private int _last_line;
 	private int _last_column;
 	private int _line;
@@ -49,7 +48,6 @@ public class Valadoc.WikiScanner : Object, Scanner {
 
 	public virtual void reset () {
 		_stop = false;
-		_last_index = 0;
 		_last_line = 0;
 		_last_column = 0;
 		_line = 0;
@@ -61,10 +59,11 @@ public class Valadoc.WikiScanner : Object, Scanner {
 		_current_string.erase (0, -1);
 	}
 
-	public void scan (string _content) throws ParserError {
-		this._content = _content;
-		for (_index = 0; !_stop && _index < _content.length; _index++) {
-			unichar c = _content[_index];
+	public void scan (string content) throws ParserError {
+		this._content = content;
+
+		for (_index = _content; !_stop && _index.get_char () != 0; _index = _index.next_char ()) {
+			unichar c = _index.get_char ();
 			accept (c);
 		}
 	}
@@ -90,24 +89,28 @@ public class Valadoc.WikiScanner : Object, Scanner {
 	}
 
 	public virtual string get_line_content () {
-		int i = _index;
-		while (i > 0 && _content[i-1] != '\n') {
-			i--;
-		}
 		StringBuilder builder = new StringBuilder ();
-		while (i < _content.length && _content[i] != '\n') {
-			unichar c = _content[i++];
+		weak string line_start = _index;
+		unichar c;
+
+		while ((char*) line_start > (char*) _content && line_start.prev_char ().get_char () != '\n') {
+			line_start = line_start.prev_char ();
+		}
+
+		while ((c = line_start.get_char ()) != '\n' && c != '\0') {
 			if (c == '\t') {
-				builder.append (" ");
+				builder.append_c (' ');
 			} else {
 				builder.append_unichar (c);
 			}
+			line_start = line_start.next_char ();
 		}
+
 		return builder.str;
 	}
 
 	protected unichar get_next_char (int offset = 1) {
-		return _content[_index + offset];
+		return _index.get_char (_index.index_of_nth_char (offset));
 	}
 
 	protected virtual void accept (unichar c) throws ParserError {
@@ -314,7 +317,6 @@ public class Valadoc.WikiScanner : Object, Scanner {
 			_parser.accept_token (new Token.from_word (_current_string.str, get_begin (), get_end (-1)));
 			_current_string.erase (0, -1);
 
-			_last_index = _index;
 			_last_line = _line;
 			_last_column = _column - 1;
 		}
@@ -325,7 +327,6 @@ public class Valadoc.WikiScanner : Object, Scanner {
 
 		_parser.accept_token (new Token.from_type (type, get_begin (), get_end (_skip)));
 
-		_last_index = _index;
 		_last_line = _line;
 		_last_column = _column;
 	}
diff --git a/src/libvaladoc/errorreporter.vala b/src/libvaladoc/errorreporter.vala
index 6b4f988..7d573ba 100755
--- a/src/libvaladoc/errorreporter.vala
+++ b/src/libvaladoc/errorreporter.vala
@@ -68,7 +68,7 @@ public class Valadoc.ErrorReporter : Object {
 		this.stream.printf ("%s:%lu.%lu-%lu.%lu: %s: %s\n", file, line, startpos, line, endpos, (type == ErrorType.ERROR)? "error" : "warning", msg);
 		if (startpos <= endpos) {
 			this.stream.printf ("%s\n", errline);
-			for (int i = 0; i < errline.length; i++) {
+			for (int i = 0; i < errline.char_count ()+1; i++) {
 				if (errline[i] == '\t') {
 					this.stream.printf ("\t");
 				} else if (i >= startpos - 1 && i < endpos - 1) {