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arduino-cli/libraries/ArduinoJson_6.x/ArduinoJson/Polyfills/pgmspace.hpp

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+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Configuration.hpp>
+#include <ArduinoJson/Namespace.hpp>
+#include <ArduinoJson/Polyfills/assert.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+// Wraps a const char* so that the our functions are picked only if the
+// originals are missing
+struct pgm_p {
+  pgm_p(const char* p) : address(p) {}
+  const char* address;
+};
+}  // namespace ARDUINOJSON_NAMESPACE
+
+#ifndef strlen_P
+inline size_t strlen_P(ARDUINOJSON_NAMESPACE::pgm_p s) {
+  const char* p = s.address;
+  ARDUINOJSON_ASSERT(p != NULL);
+  while (pgm_read_byte(p)) p++;
+  return size_t(p - s.address);
+}
+#endif
+
+#ifndef strncmp_P
+inline int strncmp_P(const char* a, ARDUINOJSON_NAMESPACE::pgm_p b, size_t n) {
+  const char* s1 = a;
+  const char* s2 = b.address;
+  ARDUINOJSON_ASSERT(s1 != NULL);
+  ARDUINOJSON_ASSERT(s2 != NULL);
+  while (n-- > 0) {
+    char c1 = *s1++;
+    char c2 = static_cast<char>(pgm_read_byte(s2++));
+    if (c1 < c2)
+      return -1;
+    if (c1 > c2)
+      return 1;
+    if (c1 == 0 /* and c2 as well */)
+      return 0;
+  }
+  return 0;
+}
+#endif
+
+#ifndef strcmp_P
+inline int strcmp_P(const char* a, ARDUINOJSON_NAMESPACE::pgm_p b) {
+  const char* s1 = a;
+  const char* s2 = b.address;
+  ARDUINOJSON_ASSERT(s1 != NULL);
+  ARDUINOJSON_ASSERT(s2 != NULL);
+  for (;;) {
+    char c1 = *s1++;
+    char c2 = static_cast<char>(pgm_read_byte(s2++));
+    if (c1 < c2)
+      return -1;
+    if (c1 > c2)
+      return 1;
+    if (c1 == 0 /* and c2 as well */)
+      return 0;
+  }
+}
+#endif
+
+#ifndef memcpy_P
+inline void* memcpy_P(void* dst, ARDUINOJSON_NAMESPACE::pgm_p src, size_t n) {
+  uint8_t* d = reinterpret_cast<uint8_t*>(dst);
+  const char* s = src.address;
+  ARDUINOJSON_ASSERT(d != NULL);
+  ARDUINOJSON_ASSERT(s != NULL);
+  while (n-- > 0) {
+    *d++ = pgm_read_byte(s++);
+  }
+  return dst;
+}
+#endif