From 0aecf90263a2548c5d31c7bce6b978245e2ca16e Mon Sep 17 00:00:00 2001
From: Tim Segers <tsegers@pm.me>
Date: Thu, 30 Oct 2025 23:37:15 +0100
Subject: Deduce ext depth

---
 ext/util/util.c | 93 ---------------------------------------------------------
 ext/util/util.h | 13 --------
 2 files changed, 106 deletions(-)
 delete mode 100644 ext/util/util.c
 delete mode 100644 ext/util/util.h

(limited to 'ext/util')

diff --git a/ext/util/util.c b/ext/util/util.c
deleted file mode 100644
index 42fe8ac..0000000
--- a/ext/util/util.c
+++ /dev/null
@@ -1,93 +0,0 @@
-#include <ctype.h>
-#include <errno.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/random.h>
-
-#include "util.h"
-
-int bin2hex(char *hex, size_t hexsize, const uint8_t *bin, size_t binlen)
-{
-    static const char hex_chars[] = "0123456789ABCDEF";
-
-    if (hex == NULL || bin == NULL || hexsize == 0)
-        return -1;
-
-    if (hexsize < (binlen * 2 + 1))
-        return -2;
-
-    for (size_t i = 0; i < binlen; ++i) {
-        hex[2 * i + 0] = hex_chars[(bin[i] >> 4) & 0xF];
-        hex[2 * i + 1] = hex_chars[(bin[i] >> 0) & 0xF];
-    }
-
-    hex[binlen * 2] = '\0';
-    return 0;
-}
-
-int hex2bin(uint8_t *bin, size_t binsize, const char *hex, size_t hexlen)
-{
-    size_t ibin = 0;
-
-    const int hi_reset = -1;
-    int hi = hi_reset;
-
-    for (size_t ihex = 0; ihex < hexlen; ihex++) {
-        char c = hex[ihex];
-
-        if (isspace((unsigned char) c))
-            continue;
-
-        /* invalid character */
-        if (!isxdigit((unsigned char) c))
-            return -1;
-
-        /* hex char encountered after bin is full */
-        if (ibin >= binsize)
-            return -2;
-
-        uint8_t val = (uint8_t) (isdigit(c) ? c - '0' : (tolower(c) - 'a' + 10));
-
-        if (hi < 0) {
-            /* process hi nibble */
-            hi = val;
-        } else {
-            /* process lo nibble, complete byte, reset hi nibble */
-            bin[ibin++] = (hi << 4) | val;
-            hi = hi_reset;
-        }
-    }
-
-    /* odd number of hex chars */
-    if (hi != hi_reset)
-        return -3;
-
-    return (int) ibin;
-}
-
-void randombytes(uint8_t *buf, uint64_t n)
-{
-    while (n > 0) {
-        ssize_t nbread;
-
-        do {
-            nbread = getrandom(buf, n, 0);
-        } while (nbread == -1 && errno == EINTR);
-
-        if (nbread < 0)
-            exit(1);
-
-        buf += nbread;
-        n -= nbread;
-    }
-}
-
-void memzero(void *ptr, size_t num)
-{
-    volatile unsigned char *volatile ptr_ = (volatile unsigned char *volatile) ptr;
-    size_t i = (size_t) 0U;
-
-    while (i < num)
-        ptr_[i++] = 0U;
-}
diff --git a/ext/util/util.h b/ext/util/util.h
deleted file mode 100644
index c67972e..0000000
--- a/ext/util/util.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef UTIL_H
-#define UTIL_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-int bin2hex(char *hex, size_t hexsize, const uint8_t *bin, size_t binlen);
-int hex2bin(uint8_t *bin, size_t binsize, const char *hex, size_t hexlen);
-
-void randombytes(uint8_t *buf, uint64_t n);
-void memzero(void *ptr, size_t num);
-
-#endif /* end of include guard: UTIL_H */
-- 
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