Move chartable to rust

Currently broken

src/charset.rs

@@ -3,7 +3,7 @@
 
 // Character table representing the character set know as CP437 used by
 // the original IBM PC - https://en.wikipedia.org/wiki/Code_page_437
-const CHAR_TABLE: [&[u8]; 218] = [
+pub(crate) const CHAR_TABLE: [&[u8]; 218] = [
     b"!",
     b"\"",
     b"#",

src/lib.rs

@@ -18,6 +18,16 @@ extern "C" {
     static mut autoDecrypt: c_int;
 }
 
+/// Return a random character from charTable[].
+#[no_mangle]
+pub extern "C" fn nmscharset_get_random() -> *const c_char {
+    let table = charset::CHAR_TABLE;
+    let idx: u16 = rand::random::<u16>();
+
+    let bytes = table[(idx as usize) % table.len()];
+    bytes.as_ptr() as *const c_char
+}
+
 #[no_mangle]
 pub extern "C" fn rust_main() {
     println!("Hello from rust");

src/nmscharset.c

@@ -10,53 +10,3 @@
  * represent encryption.
  */
  
-#include <stdlib.h>
-
-// Total characters in charTable[] array.
-#define CHAR_COUNT 218
-
-// Character table representing the character set know as CP437 used by
-// the original IBM PC - https://en.wikipedia.org/wiki/Code_page_437
-static char *charTable[] = {
-	"!", "\"", "#", "$", "%", "&", "'", "(", ")", "*", "+", ",", "-", "~",
-	".", "/", ":", ";", "<", "=", ">", "?", "[", "\\", "]", "_", "{", "}",
-	"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
-	"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
-	"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
-	"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
-	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
-	"\xc3\x87", "\xc3\xbc", "\xc3\xa9", "\xc3\xa2", "\xc3\xa4", "\xc3\xa0",
-	"\xc3\xa5", "\xc3\xa7", "\xc3\xaa", "\xc3\xab", "\xc3\xa8", "\xc3\xaf",
-	"\xc3\xae", "\xc3\xac", "\xc3\x84", "\xc3\x85", "\xc3\x89", "\xc3\xa6",
-	"\xc3\x86", "\xc3\xb4", "\xc3\xb6", "\xc3\xb2", "\xc3\xbb", "\xc3\xb9",
-	"\xc3\xbf", "\xc3\x96", "\xc3\x9c", "\xc2\xa2", "\xc2\xa3", "\xc2\xa5",
-	"\xc6\x92", "\xc3\xa1", "\xc3\xad", "\xc3\xb3", "\xc3\xba", "\xc3\xb1",
-	"\xc3\x91", "\xc2\xaa", "\xc2\xba", "\xc2\xbf", "\xc2\xac", "\xc2\xbd",
-	"\xc2\xbc", "\xc2\xa1", "\xc2\xab", "\xc2\xbb", "\xce\xb1", "\xc3\x9f",
-	"\xce\x93", "\xcf\x80", "\xce\xa3", "\xcf\x83", "\xc2\xb5", "\xcf\x84",
-	"\xce\xa6", "\xce\x98", "\xce\xa9", "\xce\xb4", "\xcf\x86", "\xce\xb5",
-	"\xc2\xb1", "\xc3\xb7", "\xc2\xb0", "\xc2\xb7", "\xc2\xb2", "\xc2\xb6",
-	"\xe2\x8c\x90", "\xe2\x82\xa7", "\xe2\x96\x91", "\xe2\x96\x92",
-	"\xe2\x96\x93", "\xe2\x94\x82", "\xe2\x94\xa4", "\xe2\x95\xa1",
-	"\xe2\x95\xa2", "\xe2\x95\x96", "\xe2\x95\x95", "\xe2\x95\xa3",
-	"\xe2\x95\x91", "\xe2\x95\x97", "\xe2\x95\x9d", "\xe2\x95\x9c",
-	"\xe2\x95\x9b", "\xe2\x94\x90", "\xe2\x94\x94", "\xe2\x94\xb4",
-	"\xe2\x94\xac", "\xe2\x94\x9c", "\xe2\x94\x80", "\xe2\x94\xbc",
-	"\xe2\x95\x9e", "\xe2\x95\x9f", "\xe2\x95\x9a", "\xe2\x95\x94",
-	"\xe2\x95\xa9", "\xe2\x95\xa6", "\xe2\x95\xa0", "\xe2\x95\x90",
-	"\xe2\x95\xac", "\xe2\x95\xa7", "\xe2\x95\xa8", "\xe2\x95\xa4",
-	"\xe2\x95\xa7", "\xe2\x95\x99", "\xe2\x95\x98", "\xe2\x95\x92",
-	"\xe2\x95\x93", "\xe2\x95\xab", "\xe2\x95\xaa", "\xe2\x94\x98",
-	"\xe2\x94\x8c", "\xe2\x96\x88", "\xe2\x96\x84", "\xe2\x96\x8c",
-	"\xe2\x96\x90", "\xe2\x96\x80", "\xe2\x88\x9e", "\xe2\x88\xa9",
-	"\xe2\x89\xa1", "\xe2\x89\xa5", "\xe2\x89\xa4", "\xe2\x8c\xa0",
-	"\xe2\x8c\xa1", "\xe2\x89\x88", "\xe2\x88\x99", "\xe2\x88\x9a",
-	"\xe2\x81\xbf", "\xe2\x96\xa0"
-};
-
-/*
- * Return a random character from charTable[].
- */
-char *nmscharset_get_random(void) {
-	return charTable[rand() % CHAR_COUNT];
-}

src/nmscharset.h

@@ -9,6 +9,6 @@
 #define NMSCHARSET_H 1
 
 // Function prototypes
-char *nmscharset_get_random(void);
+extern char *nmscharset_get_random(void);
 
 #endif