From 3eba991b3d005c3ae4aafe2235558a60e06b49f4 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Fri, 30 Jul 2010 10:37:29 +0200
Subject: Import 'hexparse' function from OpenBSC

---
 include/osmocore/utils.h |  2 ++
 src/utils.c              | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/include/osmocore/utils.h b/include/osmocore/utils.h
index 51c6f035..c5b95bd3 100644
--- a/include/osmocore/utils.h
+++ b/include/osmocore/utils.h
@@ -17,4 +17,6 @@ char bcd2char(uint8_t bcd);
 /* only works for numbers in ascci */
 uint8_t char2bcd(char c);
 
+int hexparse(const char *str, uint8_t *b, int max_len);
+
 #endif
diff --git a/src/utils.c b/src/utils.c
index 4dab0645..05381c8b 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -48,3 +48,30 @@ uint8_t char2bcd(char c)
 {
 	return c - 0x30;
 }
+
+int hexparse(const char *str, uint8_t *b, int max_len)
+
+{
+	int i, l, v;
+
+	l = strlen(str);
+	if ((l&1) || ((l>>1) > max_len))
+		return -1;
+
+	memset(b, 0x00, max_len);
+
+	for (i=0; i<l; i++) {
+		char c = str[i];
+		if (c >= '0' && c <= '9')
+			v = c - '0';
+		else if (c >= 'a' && c <= 'f')
+			v = 10 + (c - 'a');
+		else if (c >= 'A' && c <= 'F')
+			v = 10 + (c - 'A');
+		else
+			return -1;
+		b[i>>1] |= v << (i&1 ? 0 : 4);
+	}
+
+	return i>>1;
+}
-- 
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