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authorEmil Velikov <emil.l.velikov@gmail.com>2020-12-23 22:43:57 +0000
committerAllan McRae <allan@archlinux.org>2020-12-29 12:38:23 +1000
commitccdd1e3fd92591755e2b94bf63416c7b30cd217a (patch)
tree5dd2bab62c6ca7299777e6916ade3f56653e3db8 /src/common
parent831fc568fc87a75bb6e05575b93a7541b49e7aba (diff)
Move hex_representation() to src/common
We'll reuse the function in pacman with a later commit. Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
Diffstat (limited to 'src/common')
-rw-r--r--src/common/util-common.c26
-rw-r--r--src/common/util-common.h1
2 files changed, 27 insertions, 0 deletions
diff --git a/src/common/util-common.c b/src/common/util-common.c
index 7d43ac0d..fc892c11 100644
--- a/src/common/util-common.c
+++ b/src/common/util-common.c
@@ -25,6 +25,32 @@
#include "util-common.h"
+/** Create a string representing bytes in hexadecimal.
+ * @param bytes the bytes to represent in hexadecimal
+ * @param size number of bytes to consider
+ * @return a NULL terminated string with the hexadecimal representation of
+ * bytes or NULL on error. This string must be freed.
+ */
+char *hex_representation(const unsigned char *bytes, size_t size)
+{
+ static const char *hex_digits = "0123456789abcdef";
+ char *str = malloc(2 * size + 1);
+ size_t i;
+
+ if(!str) {
+ return NULL;
+ }
+
+ for(i = 0; i < size; i++) {
+ str[2 * i] = hex_digits[bytes[i] >> 4];
+ str[2 * i + 1] = hex_digits[bytes[i] & 0x0f];
+ }
+
+ str[2 * size] = '\0';
+
+ return str;
+}
+
/** Parse the basename of a program from a path.
* @param path path to parse basename from
*
diff --git a/src/common/util-common.h b/src/common/util-common.h
index 483d5da4..d9b6b4b7 100644
--- a/src/common/util-common.h
+++ b/src/common/util-common.h
@@ -23,6 +23,7 @@
#include <stdio.h>
#include <sys/stat.h> /* struct stat */
+char *hex_representation(const unsigned char *bytes, size_t size);
const char *mbasename(const char *path);
char *mdirname(const char *path);