One Month In Minsk. Made in Belarus.

1 files changed, 49 insertions, 0 deletions

diff --git a/coding/hex.cpp b/coding/hex.cpp
new file mode 100644
index 0000000000..8043401ce4
--- /dev/null
+++ b/coding/hex.cpp
@@ -0,0 +1,49 @@
+#include "../base/SRC_FIRST.hpp"
+#include "hex.hpp"
+
+#include "../base/start_mem_debug.hpp"
+
+namespace impl {
+  static const char kToHexTable[] = "0123456789ABCDEF";
+
+  void ToHexRaw(void const * src, size_t size, void * dst)
+  {
+    uint8_t const * ptr = static_cast<uint8_t const *>(src);
+    uint8_t const * end = ptr + size;
+    uint8_t * out = static_cast<uint8_t*>(dst);
+
+    while (ptr != end)
+    {
+      *out++ = kToHexTable[(*ptr) >> 4];
+      *out++ = kToHexTable[(*ptr) & 0xF];
+      ++ptr;
+    }
+  }
+
+//  static const char kFromHexTable[] = "0123456789ABCDEF";
+
+  void FromHexRaw(void const * src, size_t size, void * dst)
+  {
+    uint8_t const * ptr = static_cast<uint8_t const *>(src);
+    uint8_t const * end = ptr + size;
+    uint8_t * out = static_cast<uint8_t*>(dst);
+
+    while (ptr < end) {
+      *out = 0;
+      if (*ptr >= '0' && *ptr <= '9') {
+        *out |= ((*ptr - '0') << 4);
+      } else if (*ptr >= 'A' && *ptr <= 'F') {
+        *out |= ((*ptr - 'A' + 10) << 4);
+      }
+      ++ptr;
+
+      if (*ptr >= '0' && *ptr <= '9') {
+        *out |= ((*ptr - '0') & 0xF);
+      } else if (*ptr >= 'A' && *ptr <= 'F') {
+        *out |= ((*ptr - 'A' + 10) & 0xF);
+      }
+      ++ptr;
+      ++out;
+    }
+  }
+}