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Allowed more than 32767 values in non-embedded mode (fixes #1414)

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This commit is contained in:
Benoit Blanchon
2020-10-28 09:23:26 +01:00
parent 9d5c1b3742
commit c711fe592d
4 changed files with 52 additions and 5 deletions
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17
src/ArduinoJson/Configuration.hpp
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@ -83,6 +83,18 @@
#define ARDUINOJSON_DEFAULT_NESTING_LIMIT 10
#endif
// Number of bits to store the pointer to next node
// (saves RAM but limits the number of values in a document)
#ifndef ARDUINOJSON_SLOT_OFFSET_SIZE
#if defined(__SIZEOF_POINTER__) && __SIZEOF_POINTER__ == 2
// Address space == 16-bit => max 127 values
#define ARDUINOJSON_SLOT_OFFSET_SIZE 1
#else
// Address space > 16-bit => max 32767 values
#define ARDUINOJSON_SLOT_OFFSET_SIZE 2
#endif
#endif
#else // ARDUINOJSON_EMBEDDED_MODE
// On a computer we have plenty of memory so we can use doubles
@ -114,6 +126,11 @@
#define ARDUINOJSON_DEFAULT_NESTING_LIMIT 50
#endif
// Number of bits to store the pointer to next node
#ifndef ARDUINOJSON_SLOT_OFFSET_SIZE
#define ARDUINOJSON_SLOT_OFFSET_SIZE 4
#endif
#endif // ARDUINOJSON_EMBEDDED_MODE
#ifdef ARDUINO

30
src/ArduinoJson/Polyfills/integer.hpp Normal file
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@ -0,0 +1,30 @@
// ArduinoJson - arduinojson.org
// Copyright Benoit Blanchon 2014-2020
// MIT License
#pragma once
#include <stdint.h> // int8_t, int16_t
#include <ArduinoJson/Namespace.hpp>
namespace ARDUINOJSON_NAMESPACE {
template <int Bits>
struct int_t;
template <>
struct int_t<8> {
typedef int8_t type;
};
template <>
struct int_t<16> {
typedef int16_t type;
};
template <>
struct int_t<32> {
typedef int32_t type;
};
} // namespace ARDUINOJSON_NAMESPACE

9
src/ArduinoJson/Variant/VariantSlot.hpp
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@ -4,8 +4,7 @@
#pragma once
#include <stdint.h> // int8_t, int16_t
#include <ArduinoJson/Polyfills/integer.hpp>
#include <ArduinoJson/Polyfills/limits.hpp>
#include <ArduinoJson/Polyfills/type_traits.hpp>
#include <ArduinoJson/Strings/StoragePolicy.hpp>
@ -13,7 +12,7 @@
namespace ARDUINOJSON_NAMESPACE {
typedef conditional<sizeof(void*) <= 2, int8_t, int16_t>::type VariantSlotDiff;
typedef int_t<ARDUINOJSON_SLOT_OFFSET_SIZE * 8>::type VariantSlotDiff;
class VariantSlot {
// CAUTION: same layout as VariantData
@ -63,9 +62,9 @@ class VariantSlot {
void setNext(VariantSlot* slot) {
ARDUINOJSON_ASSERT(!slot || slot - this >=
numeric_limits<VariantSlotDiff>::lowest());
numeric_limits<VariantSlotDiff>::lowest());
ARDUINOJSON_ASSERT(!slot || slot - this <=
numeric_limits<VariantSlotDiff>::highest());
numeric_limits<VariantSlotDiff>::highest());
_next = VariantSlotDiff(slot ? slot - this : 0);
}