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// ArduinoJson - https://arduinojson.org
// Copyright Benoit Blanchon 2014-2021
// MIT License
#pragma once
#include "lib/ArduinoJson/Configuration.hpp"
#include "lib/ArduinoJson/Namespace.hpp"
#include "lib/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
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