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diff --git a/misc.c b/misc.c
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+/* 
+Miscellaneous C functions which toc uses.
+
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+For more information, please refer to <http://unlicense.org/>
+*/
+
+
+/* 
+A better alternative to strncpy. dest is guaranteed to be a null-terminated string
+after this function is run.
+Returns the number of characters copied to dest, not including the null character.
+destsz must be greater than 0.
+*/
+size_t str_copy(char *dest, size_t destsz, const char *src) {
+	assert(destsz);
+	if (!*src) {
+		*dest = 0;
+		return 0;
+	}
+	for (size_t i = 0; i < destsz-1; ++i) {
+		*dest = *src;
+		if (!*src) {
+			*dest = 0;
+			return i;
+		}
+		++src; ++dest;
+	}
+	dest[destsz-1] = 0;
+	return destsz-1;
+}
+
+static U32 rand_u32(U32 seed) {
+	U64 seed64 = (U64)seed;
+	return (U32)((seed64 * 0x832f0fda4e1a8642 + 0x41d49cd5459a2ab4) >> 32);
+}