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arduino-cli/libraries/ArduinoJson_6.x/ArduinoJson/Json/Utf8.hpp

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+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Namespace.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+namespace Utf8 {
+template <typename TStringBuilder>
+inline void encodeCodepoint(uint32_t codepoint32, TStringBuilder& str) {
+  // this function was optimize for code size on AVR
+
+  // a buffer to store the string in reverse
+  char buf[5];
+  char* p = buf;
+
+  *(p++) = 0;
+  if (codepoint32 < 0x80) {
+    *(p++) = char((codepoint32));
+  } else {
+    *(p++) = char((codepoint32 | 0x80) & 0xBF);
+    uint16_t codepoint16 = uint16_t(codepoint32 >> 6);
+    if (codepoint16 < 0x20) {  // 0x800
+      *(p++) = char(codepoint16 | 0xC0);
+    } else {
+      *(p++) = char((codepoint16 | 0x80) & 0xBF);
+      codepoint16 = uint16_t(codepoint16 >> 6);
+      if (codepoint16 < 0x10) {  // 0x10000
+        *(p++) = char(codepoint16 | 0xE0);
+      } else {
+        *(p++) = char((codepoint16 | 0x80) & 0xBF);
+        codepoint16 = uint16_t(codepoint16 >> 6);
+        *(p++) = char(codepoint16 | 0xF0);
+      }
+    }
+  }
+
+  while (*(--p)) {
+    str.append(*p);
+  }
+}
+}  // namespace Utf8
+}  // namespace ARDUINOJSON_NAMESPACE