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Add a polyfill for pgm_read_dword() (issue #1433)

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This commit is contained in:
Benoit Blanchon
2021-12-31 13:13:51 +01:00
parent 8f029e6096
commit d20c3c65c8
2 changed files with 9 additions and 5 deletions
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10
src/ArduinoJson/Polyfills/pgmspace.hpp
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@ -14,7 +14,7 @@ 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) {}
pgm_p(const void* p) : address(reinterpret_cast<const char*>(p)) {}
const char* address;
};
} // namespace ARDUINOJSON_NAMESPACE
@ -95,3 +95,11 @@ inline void* memcpy_P(void* dst, ARDUINOJSON_NAMESPACE::pgm_p src, size_t n) {
return dst;
}
#endif
#ifndef pgm_read_dword
inline uint32_t pgm_read_dword(ARDUINOJSON_NAMESPACE::pgm_p p) {
uint32_t result;
memcpy_P(&result, p, 4);
return result;
}
#endif