From 646ef07aab383dd1cdcdabcb52e222c98bfeda62 Mon Sep 17 00:00:00 2001
From: Barry Kane <barra@ocathain.ie>
Date: Mon, 20 Feb 2023 23:03:07 +0000
Subject: [PATCH] Added silvermud-command-hash-tester. This is to assist with
 the development of SilverMUD, to allow me to calculate the hash of a string
 from the command line.

---
 silvermud-command-hash-tester.c | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 silvermud-command-hash-tester.c

diff --git a/silvermud-command-hash-tester.c b/silvermud-command-hash-tester.c
new file mode 100644
index 0000000..9b71d50
--- /dev/null
+++ b/silvermud-command-hash-tester.c
@@ -0,0 +1,36 @@
+// A small utility to get the hash of a string for SilverMUD's command evaluator:
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+unsigned int hashCommand(char * command, unsigned int commandLength)
+{
+	// Lowercase the string:
+	for (char * character = command; *character; ++character)
+	{
+		*character = tolower(*character);
+	}
+
+	// Hash the string:
+	char * currentCharacter = command;
+	unsigned int hash = 0;
+	
+	for (unsigned int index = 0; index < commandLength && *currentCharacter != '\0'; currentCharacter++)
+	{
+		hash = 37 * hash + *currentCharacter;
+	}
+
+	return hash;
+}
+
+void main(int argc, char ** argv)
+{
+	if(argc >= 2)
+	{
+		printf("%u\n", hashCommand(argv[1], strlen(argv[1])));
+	}
+	else
+	{
+		printf("Please provide a string to hash as argument one.\n");
+	}
+}