delete util/libreboot-utils (unused code)

this was an intense audit of nvmutil that somehow evolved
into writing a new, hardened implementation of mktemp.

it all works, a few memory bugs to solve on bsd, but i don't
see the point in keeping it. mktemp is fine, and nvmutil
already works.

lbutils implemented atomic writes and integrity checking,
in a manner completely overengineered for what it was
actually doing (modifying a few bytes in 8KB GbE files)

just delete it. i'll bring it back if i ever finish the
code. i don't want to leave dead/unfinished code in the tree.

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 0 insertions, 116 deletions

diff --git a/util/libreboot-utils/lib/num.c b/util/libreboot-utils/lib/num.c
deleted file mode 100644
index ce5e420d..00000000
--- a/util/libreboot-utils/lib/num.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* SPDX-License-Identifier: MIT
- * Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
- *
- * Non-randomisation-related numerical functions.
- * For rand functions, see: rand.c
- */
-
-#ifdef __OpenBSD__
-#include <sys/param.h>
-#endif
-#include <sys/types.h>
-
-#include <errno.h>
-#if !((defined(__OpenBSD__) && (OpenBSD) >= 201) || \
-    defined(__FreeBSD__) || \
-    defined(__NetBSD__) || defined(__APPLE__))
-#include <fcntl.h> /* if not arc4random: /dev/urandom */
-#endif
-#include <ctype.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "../include/common.h"
-
-unsigned short
-hextonum(char ch_s)
-{
-	unsigned char ch;
-
-	ch = (unsigned char)ch_s;
-
-	if ((unsigned int)(ch - '0') <= 9)
-		return ch - '0';
-
-	ch |= 0x20;
-
-	if ((unsigned int)(ch - 'a') <= 5)
-		return ch - 'a' + 10;
-
-	if (ch == '?' || ch == 'x') /* random */
-		return (short)rsize(16); /* <-- with rejection sampling! */
-
-	return 16;
-}
-
-/* basically hexdump -C */
-/*
-	TODO: optimise this
-	write a full util for hexdump
-	how to optimise:
-	don't call print tens of thousands of times!
-	convert the numbers manually, and cache everything
-	in a BUFSIZ sized buffer, with everything properly
-	aligned. i worked out that i could fit 79 rows
-	in a 8KB buffer (1264 bytes of numbers represented
-	as strings in hex)
-	this depends on the OS, and would be calculated at
-	runtime.
-	then:
-	don't use printf. just write it to stdout (basically
-	a simple cat implementation)
-*/
-void
-spew_hex(const void *data, size_t len)
-{
-	const unsigned char *buf = (const unsigned char *)data;
-	unsigned char c;
-	size_t i;
-	size_t j;
-
-	if (buf == NULL ||
-	    len == 0)
-		return;
-
-	for (i = 0; i < len; i += 16) {
-
-		if (len <= 4294967296) /* below 4GB */
-			printf("%08zx  ", i);
-		else
-			printf("%16zu  ", i);
-
-		for (j = 0; j < 16; j++) {
-
-			if (i + j < len)
-				printf("%02x ", buf[i + j]);
-			else
-				printf("   ");
-
-			if (j == 7)
-				printf(" ");
-		}
-
-		printf(" |");
-
-		for (j = 0; j < 16 && i + j < len; j++) {
-
-			c = buf[i + j];
-			printf("%c", isprint(c) ? c : '.');
-		}
-
-		printf("|\n");
-	}
-
-	printf("%08zx\n", len);
-}
-
-void
-check_bin(size_t a, const char *a_name)
-{
-	if (a > 1)
-		exitf("%s must be 0 or 1, but is %lu",
-		    a_name, (size_t)a);
-}