From: Jo-Philipp Wich <jo@mein.io>
Date: Thu, 7 Dec 2017 13:23:00 +0000 (+0100)
Subject: file_util: implement urldecode_path()
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=71c27cb3aee45ba22d3c7806401baf8a0dee3d94;p=oweals%2Fopkg-lede.git

file_util: implement urldecode_path()

Introduce a new urldecode_path() helper to resolve percent-encoded URL
portions back into the original binary form.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
---

diff --git a/libopkg/file_util.c b/libopkg/file_util.c
index 759c21b..61ff736 100644
--- a/libopkg/file_util.c
+++ b/libopkg/file_util.c
@@ -395,3 +395,23 @@ char *urlencode_path(const char *filename)
 
 	return (char *)copy;
 }
+
+char *urldecode_path(const char *filename)
+{
+	unsigned char *copy = (unsigned char *)xstrdup(filename);
+	unsigned char *in, *out;
+
+	for (in = copy, out = copy; *in != 0; in++) {
+		if (*in == '%' && isxdigit(in[1]) && isxdigit(in[2])) {
+			*out++ = hex2bin(in[1]) * 16 + hex2bin(in[2]);
+			in += 2;
+		}
+		else {
+			*out++ = *in;
+		}
+	}
+
+	*out = 0;
+
+	return (char *)copy;
+}
diff --git a/libopkg/file_util.h b/libopkg/file_util.h
index e078f41..279db82 100644
--- a/libopkg/file_util.h
+++ b/libopkg/file_util.h
@@ -32,5 +32,6 @@ char *checksum_bin2hex(const char *src, size_t len);
 char *checksum_hex2bin(const char *src, size_t *len);
 
 char *urlencode_path(const char *filename);
+char *urldecode_path(const char *filename);
 
 #endif