[vlc-commits] strings: add function to hex-encode binary data

[Marvin Scholz]

vlc | branch: master | Marvin Scholz <epirat07 at gmail.com> | Tue Apr  7 23:49:59 2020 +0200| [5f38902ab7e3c96c11830f6006b8cda661bc66aa] | committer: Marvin Scholz

strings: add function to hex-encode binary data

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=5f38902ab7e3c96c11830f6006b8cda661bc66aa
---

 include/vlc_strings.h | 12 ++++++++++++
 src/libvlccore.sym    |  1 +
 src/text/strings.c    | 10 ++++++++++
 3 files changed, 23 insertions(+)

diff --git a/include/vlc_strings.h b/include/vlc_strings.h
index 411f4a8ceb..930d3347fb 100644
--- a/include/vlc_strings.h
+++ b/include/vlc_strings.h
@@ -118,6 +118,18 @@ VLC_API void vlc_xml_decode(char *st);
  */
 VLC_API char *vlc_xml_encode(const char *str) VLC_MALLOC;
 
+/**
+ * Encode binary data as hex string
+ *
+ * Writes a given data buffer to the output buffer as a null terminated
+ * string in hexadecimal representation.
+ *
+ * \param      input    Input buffer
+ * \param      size     Input buffer size
+ * \param[out] output   Output buffer to write the string to
+ */
+VLC_API void vlc_hex_encode_binary(const void *input, size_t size, char *output);
+
 /**
  * Base64 encoding.
  *
diff --git a/src/libvlccore.sym b/src/libvlccore.sym
index a96d9100ad..b27431dc80 100644
--- a/src/libvlccore.sym
+++ b/src/libvlccore.sym
@@ -480,6 +480,7 @@ vlc_b64_decode_binary
 vlc_b64_decode_binary_to_buffer
 vlc_b64_encode
 vlc_b64_encode_binary
+vlc_hex_encode_binary
 vlc_cancel
 vlc_clone
 VLC_CompileBy
diff --git a/src/text/strings.c b/src/text/strings.c
index 658249f890..9676687aae 100644
--- a/src/text/strings.c
+++ b/src/text/strings.c
@@ -346,6 +346,16 @@ char *vlc_xml_encode (const char *str)
     return stream.ptr;
 }
 
+/* Hex encoding */
+void vlc_hex_encode_binary(const void *input, size_t size, char *output)
+{
+    const unsigned char *buffer = input;
+
+    for (size_t i = 0; i < size; i++) {
+        sprintf(&output[i * 2], "%02hhx", buffer[i]);
+    }
+}
+
 /* Base64 encoding */
 char *vlc_b64_encode_binary(const void *src, size_t length)
 {