Initial push

util.h

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+#pragma once
+
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef char *string; // differentiate null-terminated C-string from bytes
+
+/**
+ * Analog to `strstr()`, for non-C-string haystacks.
+ */
+char *memstr(char *haystack, size_t n, string needle);
+
+/**
+ * Safe version of `strtoul()`
+ *
+ * Will return the result of strtoul, unless an error occurs.
+ * In that case, the given message will be printed before exiting the program.
+ */
+uint16_t safe_strtoul(const char *restrict nptr, char **restrict endptr,
+                      int base, const string message);
+
+/**
+ * creates a 16 bit hash value of the given buffer
+ * @param buffer
+ * @param buf_len
+ * @return the 16 bit hash
+ */
+uint16_t pseudo_hash(const unsigned char *buffer, size_t buf_len);