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authorGareth McMullin2011-02-04 20:23:52 +1300
committerGareth McMullin2011-02-04 20:23:52 +1300
commit406617a2a470021d9412e9280feda0d28bdb653b (patch)
tree43b2cb9b562fde0bf5187c31dea77d72318cfc29 /src/hex_utils.c
Import of working source tree.
Diffstat (limited to 'src/hex_utils.c')
-rw-r--r--src/hex_utils.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/hex_utils.c b/src/hex_utils.c
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--- /dev/null
+++ b/src/hex_utils.c
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+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2011 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Convenience function to convert to/from ascii strings of hex digits.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "hex_utils.h"
+
+static char hexdigits[] = "0123456789abcdef";
+
+char * hexify(char *hex, const unsigned char *buf, int size)
+{
+ char *tmp = hex;
+
+ while(size--) {
+ *tmp++ = hexdigits[*buf >> 4];
+ *tmp++ = hexdigits[*buf++ & 0xF];
+ }
+ *tmp++ = 0;
+
+ return hex;
+}
+
+static uint8_t unhex_digit(char hex)
+{
+ uint8_t tmp = hex - '0';
+ if(tmp > 9)
+ tmp -= 'A' - '0' - 10;
+ if(tmp > 16)
+ tmp -= 'a' - 'A';
+ return tmp;
+}
+
+char * unhexify(unsigned char *buf, const char *hex, int size)
+{
+ while(size--) {
+ *buf = unhex_digit(*hex++) << 4;
+ *buf++ |= unhex_digit(*hex++);
+ }
+ return buf;
+}
+