add a utilCStrMatch helper

this checks both the length of a cstr, and if the strings match. an
improvement over checking with std::strncmp(), which could match two
strings where one matched the prefix of the other

src/util.h

@@ -55,6 +55,12 @@ char* utilAllocateCStr(const char* str, u32 max_len = 256);
 
 void utilSafeFree(void* p);
 
+//---------------
+// C string utils
+
+bool utilCStrMatch(const char* str1, const char* str2);
+
+
 #endif // UTIL_H
 
 
@@ -170,4 +176,18 @@ utilSafeFree(void* p)
 		LOGF(Error, "free called on nullptr\n");
 }
 
+//---------------
+// C string utils
+
+bool
+utilCStrMatch(const char* str1, const char* str2)
+{
+	assert(str1 != nullptr && str2 != nullptr);
+	u32 l1 = strlen(str1);
+	u32 l2 = strlen(str2);
+
+	return (l1 == l2)
+		&& (strncmp(str1, str2, l1) == 0);
+}
+
 #endif