Use size_t in dev::utf8::validate()

3 files changed, 7 insertions, 7 deletions

diff --git a/libdevcore/UTF8.cpp b/libdevcore/UTF8.cpp
index 0c385e81..a71693a8 100644
--- a/libdevcore/UTF8.cpp
+++ b/libdevcore/UTF8.cpp
@@ -31,18 +31,18 @@ namespace utf8
 {
 
 
-bool validate(std::string const& _input, int& _invalidPosition)
+bool validate(std::string const& _input, size_t& _invalidPosition)
 {
-	const int length = _input.length();
+	const size_t length = _input.length();
 	bool valid = true;
-	int i = 0;
+	size_t i = 0;
 
 	for (; i < length; i++)
 	{
 		if ((unsigned char)_input[i] < 0x80)
 			continue;
 
-		int count = 0;
+		size_t count = 0;
 		switch(_input[i] & 0xe0) {
 			case 0xc0: count = 1; break;
 			case 0xe0: count = 2; break;
@@ -62,7 +62,7 @@ bool validate(std::string const& _input, int& _invalidPosition)
 			break;
 		}
 
-		for (int j = 0; j < count; j++)
+		for (size_t j = 0; j < count; j++)
 		{
 			i++;
 			if ((_input[i] & 0xc0) != 0x80)
diff --git a/libdevcore/UTF8.h b/libdevcore/UTF8.h
index 2824d5bf..d6959f3e 100644
--- a/libdevcore/UTF8.h
+++ b/libdevcore/UTF8.h
@@ -33,7 +33,7 @@ namespace utf8
 
 /// Validate an input for UTF8 encoding
 /// @returns true if it is invalid and the first invalid position in invalidPosition
-bool validate(std::string const& _input, int& _invalidPosition);
+bool validate(std::string const& _input, size_t& _invalidPosition);
 
 }
 
diff --git a/libsolidity/ast/Types.cpp b/libsolidity/ast/Types.cpp
index d6f6225c..aae18934 100644
--- a/libsolidity/ast/Types.cpp
+++ b/libsolidity/ast/Types.cpp
@@ -855,7 +855,7 @@ bool StringLiteralType::operator==(const Type& _other) const
 
 std::string StringLiteralType::toString(bool) const
 {
-	int invalidSequence;
+	size_t invalidSequence;
 
 	if (!dev::utf8::validate(m_value, invalidSequence))
 		return "literal_string (contains invalid UTF-8 sequence at position " + dev::toString(invalidSequence) + ")";