utils-std

commit: 40eaa1f5c8c1ca6de9773435869dbf844823cd6c
parent 5a66298eea637fe9abf2c56f896ceca8f2c39e03
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Thu, 15 Aug 2024 15:06:11 +0200

lib/bytes2hex.c: new

Diffstat:
A
lib/bytes2hex.c
24
++++++++++++++++++++++++
A
lib/strconv.h
8
++++++++

2 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/lib/bytes2hex.c b/lib/bytes2hex.c
@@ -0,0 +1,24 @@
+// utils-std: Collection of commonly available Unix tools
+// SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+// SPDX-License-Identifier: 0BSD
+
+#define _POSIX_C_SOURCE 200809L
+#include "./strconv.h"
+
+#include <assert.h>
+
+void
+bytes2hex(const uint8_t *data, size_t datalen, char *buf, size_t buflen)
+{
+	static char *hextab = "0123456789abcdef";
+
+	assert(buflen >= datalen * 2);
+
+	size_t bi = 0;
+	for(size_t i = 0; i < datalen; i++)
+	{
+		buf[bi++] = hextab[data[i] / 0x10];
+		buf[bi++] = hextab[data[i] % 0x10];
+	}
+	if(bi < buflen) buf[bi] = '\0';
+}
diff --git a/lib/strconv.h b/lib/strconv.h
@@ -0,0 +1,8 @@
+// utils-std: Collection of commonly available Unix tools
+// SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+// SPDX-License-Identifier: 0BSD
+
+#include <stdint.h>    // uint8_t
+#include <sys/types.h> // size_t
+
+void bytes2hex(const uint8_t *data, size_t datalen, char *buf, size_t buflen);