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arduino-cli/libraries/ArduinoJson_6.x/ArduinoJson/Serialization/Writers/StaticStringWriter.hpp

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+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Namespace.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+// A Print implementation that allows to write in a char[]
+class StaticStringWriter {
+ public:
+  StaticStringWriter(char *buf, size_t size) : end(buf + size - 1), p(buf) {
+    *p = '\0';
+  }
+
+  size_t write(uint8_t c) {
+    if (p >= end)
+      return 0;
+    *p++ = static_cast<char>(c);
+    *p = '\0';
+    return 1;
+  }
+
+  size_t write(const uint8_t *s, size_t n) {
+    char *begin = p;
+    while (p < end && n > 0) {
+      *p++ = static_cast<char>(*s++);
+      n--;
+    }
+    *p = '\0';
+    return size_t(p - begin);
+  }
+
+ private:
+  char *end;
+  char *p;
+};
+}  // namespace ARDUINOJSON_NAMESPACE