Added fetch and fetchPeek functions for reading the current character without advancing any cursor

2 files changed, 36 insertions, 4 deletions

diff --git a/src/core/common/CharReader.cpp b/src/core/common/CharReader.cpp
index 4d3638c..3e95280 100644
--- a/src/core/common/CharReader.cpp
+++ b/src/core/common/CharReader.cpp
@@ -468,15 +468,27 @@ bool CharReader::read(char &c)
 	return res;
 }
 
+bool CharReader::fetch(char &c)
+{
+	return buffer->fetch(readCursor, c);
+}
+
+bool CharReader::fetchPeek(char &c)
+{
+	if (coherent) {
+		return fetch(c);
+	}
+	return buffer->fetch(peekCursor, c);
+}
+
 bool CharReader::expect(char c)
 {
-	char actual = 0;
-	peek(actual);
-	if (c == actual) {
+	char actual;
+	if (fetch(actual) && (actual == c)) {
+		peek(actual);
 		consumePeek();
 		return true;
 	}
-	resetPeek();
 	return false;
 }
 
diff --git a/src/core/common/CharReader.hpp b/src/core/common/CharReader.hpp
index 64c80af..a90d337 100644
--- a/src/core/common/CharReader.hpp
+++ b/src/core/common/CharReader.hpp
@@ -490,6 +490,26 @@ public:
 	bool read(char &c);
 
 	/**
+	 * Returns the current character at the read cursor without advancing it.
+	 *
+	 * @param c is a reference to the character into which the result should be
+	 * written.
+	 * @return true if the operation was successful, false if the cursor is at
+	 * the end of the file.
+	 */
+	bool fetch(char &c);
+
+	/**
+	 * Returns the current character at the peek cursor without advancing it.
+	 *
+	 * @param c is a reference to the character into which the result should be
+	 * written.
+	 * @return true if the operation was successful, false if the cursor is at
+	 * the end of the file.
+	 */
+	bool fetchPeek(char &c);
+
+	/**
 	 * Peeks a character, checks whether this character equals the given
 	 * character -- and if yes -- consumes the peek, otherwise resets it.
 	 *