ConfigData: Add support for signed integers

src/ConfigData.cxx

@@ -29,6 +29,17 @@
 #include <string.h>
 #include <stdlib.h>
 
+int
+block_param::GetIntValue() const
+{
+	char *endptr;
+	long value2 = strtol(value.c_str(), &endptr, 0);
+	if (*endptr != 0)
+		FormatFatalError("Not a valid number in line %i", line);
+
+	return value2;
+}
+
 unsigned
 block_param::GetUnsignedValue() const
 {
@@ -120,6 +131,16 @@ config_param::GetBlockPath(const char *name, Error &error) const
 	return GetBlockPath(name, nullptr, error);
 }
 
+int
+config_param::GetBlockValue(const char *name, int default_value) const
+{
+	const block_param *bp = GetBlockParam(name);
+	if (bp == nullptr)
+		return default_value;
+
+	return bp->GetIntValue();
+}
+
 unsigned
 config_param::GetBlockValue(const char *name, unsigned default_value) const
 {

src/ConfigData.hxx

@@ -46,6 +46,9 @@ struct block_param {
 		:name(_name), value(_value), line(_line), used(false) {}
 
 	gcc_pure
+	int GetIntValue() const;
+
+	gcc_pure
 	unsigned GetUnsignedValue() const;
 
 	gcc_pure
@@ -115,6 +118,9 @@ struct config_param {
 	AllocatedPath GetBlockPath(const char *name, Error &error) const;
 
 	gcc_pure
+	int GetBlockValue(const char *name, int default_value) const;
+
+	gcc_pure
 	unsigned GetBlockValue(const char *name, unsigned default_value) const;
 
 	gcc_pure