Remove `ARDUINOJSON_EMBEDDED_MODE`

.github/workflows/ci.yml

@@ -135,11 +135,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
       - name: GCC 32-bit
-        run: g++ -std=c++11 -m32 -Isrc extras/conf_test/x86-linux.cpp
+        run: g++ -std=c++11 -m32 -Isrc extras/conf_test/x86.cpp
       - name: GCC 64-bit
         run: g++ -std=c++11 -m64 -Isrc extras/conf_test/x64.cpp
       - name: Clang 32-bit
-        run: clang++ -std=c++11 -m32 -Isrc extras/conf_test/x86-linux.cpp
+        run: clang++ -std=c++11 -m32 -Isrc extras/conf_test/x86.cpp
       - name: Clang 64-bit
         run: clang++ -std=c++11 -m64 -Isrc extras/conf_test/x64.cpp
 
@@ -153,7 +153,7 @@ jobs:
       - name: 32-bit
         run: |
           call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars32.bat"
-          cl /Isrc extras/conf_test/x86-windows.cpp
+          cl /Isrc extras/conf_test/x86.cpp
         shell: cmd
       - name: 64-bit
         run: |

CHANGELOG.md

@@ -1,6 +1,12 @@
 ArduinoJson: change log
 =======================
 
+HEAD
+----
+
+* Remove `ARDUINOJSON_EMBEDDED_MODE` and assume we run on an embedded platform.  
+  Dependent settings (like `ARDUINOJSON_DEFAULT_NESTING_LIMIT`) must be set individually.
+
 v6.18.5 (2021-09-28)
 -------
 

CMakeLists.txt

@@ -7,7 +7,6 @@ cmake_minimum_required(VERSION 3.3)
 if(ESP_PLATFORM)
    # Build ArduinoJson as an ESP-IDF component
    idf_component_register(INCLUDE_DIRS src)
-   target_compile_definitions(${COMPONENT_LIB} INTERFACE ARDUINOJSON_EMBEDDED_MODE=1)
    return()
 endif()
 

extras/conf_test/x86-windows.cpp

@@ -1,15 +0,0 @@
-#include <ArduinoJson.h>
-
-static_assert(ARDUINOJSON_USE_LONG_LONG == 1, "ARDUINOJSON_USE_LONG_LONG");
-
-static_assert(ARDUINOJSON_SLOT_OFFSET_SIZE == 4,
-              "ARDUINOJSON_SLOT_OFFSET_SIZE");
-
-static_assert(ARDUINOJSON_LITTLE_ENDIAN == 1, "ARDUINOJSON_LITTLE_ENDIAN");
-
-static_assert(ARDUINOJSON_USE_DOUBLE == 1, "ARDUINOJSON_USE_DOUBLE");
-
-static_assert(sizeof(ARDUINOJSON_NAMESPACE::VariantSlot) == 24,
-              "sizeof(VariantSlot)");
-
-int main() {}

extras/conf_test/x86-linux.cpp → extras/conf_test/x86.cpp

@@ -2,14 +2,14 @@
 
 static_assert(ARDUINOJSON_USE_LONG_LONG == 1, "ARDUINOJSON_USE_LONG_LONG");
 
-static_assert(ARDUINOJSON_SLOT_OFFSET_SIZE == 4,
+static_assert(ARDUINOJSON_SLOT_OFFSET_SIZE == 2,
               "ARDUINOJSON_SLOT_OFFSET_SIZE");
 
 static_assert(ARDUINOJSON_LITTLE_ENDIAN == 1, "ARDUINOJSON_LITTLE_ENDIAN");
 
 static_assert(ARDUINOJSON_USE_DOUBLE == 1, "ARDUINOJSON_USE_DOUBLE");
 
-static_assert(sizeof(ARDUINOJSON_NAMESPACE::VariantSlot) == 20,
+static_assert(sizeof(ARDUINOJSON_NAMESPACE::VariantSlot) == 16,
               "sizeof(VariantSlot)");
 
 int main() {}

src/ArduinoJson/Configuration.hpp

@@ -26,130 +26,86 @@
 #  define ARDUINOJSON_HAS_INT64 0
 #endif
 
-// Small or big machine?
-#ifndef ARDUINOJSON_EMBEDDED_MODE
-#  if defined(ARDUINO)                /* Arduino*/                 \
-      || defined(__IAR_SYSTEMS_ICC__) /* IAR Embedded Workbench */ \
-      || defined(__XC)                /* MPLAB XC compiler */      \
-      || defined(__ARMCC_VERSION)     /* Keil ARM Compiler */      \
-      || defined(__NIOS2__)           /* Altera Nios II EDS */     \
-      || defined(__AVR)               /* Atmel AVR8/GNU C Compiler */
-#    define ARDUINOJSON_EMBEDDED_MODE 1
-#  else
-#    define ARDUINOJSON_EMBEDDED_MODE 0
-#  endif
-#endif
-
-// Auto enable std::stream if the right headers are here and no conflicting
-// macro is defined
-#if !defined(ARDUINOJSON_ENABLE_STD_STREAM) && defined(__has_include)
-#  if __has_include(<istream>) && \
+// Support std::istream and std::ostream
+#ifndef ARDUINOJSON_ENABLE_STD_STREAM
+#  ifdef __has_include
+#    if __has_include(<istream>) && \
     __has_include(<ostream>) && \
     !defined(min) && \
     !defined(max)
-#    define ARDUINOJSON_ENABLE_STD_STREAM 1
+#      define ARDUINOJSON_ENABLE_STD_STREAM 1
+#    else
+#      define ARDUINOJSON_ENABLE_STD_STREAM 0
+#    endif
 #  else
-#    define ARDUINOJSON_ENABLE_STD_STREAM 0
+#    ifdef ARDUINO
+#      define ARDUINOJSON_ENABLE_STD_STREAM 0
+#    else
+#      define ARDUINOJSON_ENABLE_STD_STREAM 1
+#    endif
 #  endif
 #endif
 
-// Auto enable std::string if the right header is here and no conflicting
-// macro is defined
-#if !defined(ARDUINOJSON_ENABLE_STD_STRING) && defined(__has_include)
-#  if __has_include(<string>) && !defined(min) && !defined(max)
-#    define ARDUINOJSON_ENABLE_STD_STRING 1
+// Support std::string
+#ifndef ARDUINOJSON_ENABLE_STD_STRING
+#  ifdef __has_include
+#    if __has_include(<string>) && !defined(min) && !defined(max)
+#      define ARDUINOJSON_ENABLE_STD_STRING 1
+#    else
+#      define ARDUINOJSON_ENABLE_STD_STRING 0
+#    endif
 #  else
-#    define ARDUINOJSON_ENABLE_STD_STRING 0
+#    ifdef ARDUINO
+#      define ARDUINOJSON_ENABLE_STD_STRING 0
+#    else
+#      define ARDUINOJSON_ENABLE_STD_STRING 1
+#    endif
 #  endif
 #endif
 
+// Support for std::string_view
 #ifndef ARDUINOJSON_ENABLE_STRING_VIEW
 #  ifdef __has_include
 #    if __has_include(<string_view>) && __cplusplus >= 201703L
 #      define ARDUINOJSON_ENABLE_STRING_VIEW 1
+#    else
+#      define ARDUINOJSON_ENABLE_STRING_VIEW 0
 #    endif
+#  else
+#    define ARDUINOJSON_ENABLE_STRING_VIEW 0
 #  endif
 #endif
-#ifndef ARDUINOJSON_ENABLE_STRING_VIEW
-#  define ARDUINOJSON_ENABLE_STRING_VIEW 0
-#endif
-
-#if ARDUINOJSON_EMBEDDED_MODE
 
-// Store floats by default to reduce the memory usage (issue #134)
-#  ifndef ARDUINOJSON_USE_DOUBLE
-#    define ARDUINOJSON_USE_DOUBLE 0
-#  endif
-
-// Store longs by default, because they usually match the size of a float.
-#  ifndef ARDUINOJSON_USE_LONG_LONG
-#    define ARDUINOJSON_USE_LONG_LONG 0
-#  endif
-
-// Embedded systems usually don't have std::string
-#  ifndef ARDUINOJSON_ENABLE_STD_STRING
-#    define ARDUINOJSON_ENABLE_STD_STRING 0
-#  endif
+// Store floating-point values with float (0) or double (1)
+#ifndef ARDUINOJSON_USE_DOUBLE
+#  define ARDUINOJSON_USE_DOUBLE 0
+#endif
 
-// Embedded systems usually don't have std::stream
-#  ifndef ARDUINOJSON_ENABLE_STD_STREAM
-#    define ARDUINOJSON_ENABLE_STD_STREAM 0
-#  endif
+// Store integral values with long (0) or long long (1)
+#ifndef ARDUINOJSON_USE_LONG_LONG
+#  define ARDUINOJSON_USE_LONG_LONG 0
+#endif
 
 // Limit nesting as the stack is likely to be small
-#  ifndef ARDUINOJSON_DEFAULT_NESTING_LIMIT
-#    define ARDUINOJSON_DEFAULT_NESTING_LIMIT 10
-#  endif
+#ifndef ARDUINOJSON_DEFAULT_NESTING_LIMIT
+#  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
+#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
-#  ifndef ARDUINOJSON_USE_DOUBLE
-#    define ARDUINOJSON_USE_DOUBLE 1
-#  endif
-
-// Use long long when available
-#  ifndef ARDUINOJSON_USE_LONG_LONG
-#    if ARDUINOJSON_HAS_LONG_LONG || ARDUINOJSON_HAS_INT64
-#      define ARDUINOJSON_USE_LONG_LONG 1
-#    else
-#      define ARDUINOJSON_USE_LONG_LONG 0
-#    endif
-#  endif
-
-// On a computer, we can use std::string
-#  ifndef ARDUINOJSON_ENABLE_STD_STRING
-#    define ARDUINOJSON_ENABLE_STD_STRING 1
-#  endif
-
-// On a computer, we can assume std::stream
-#  ifndef ARDUINOJSON_ENABLE_STD_STREAM
-#    define ARDUINOJSON_ENABLE_STD_STREAM 1
-#  endif
-
-// On a computer, the stack is large so we can increase nesting limit
-#  ifndef ARDUINOJSON_DEFAULT_NESTING_LIMIT
-#    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 1
+#  elif defined(__SIZEOF_POINTER__) && __SIZEOF_POINTER__ >= 8 || \
+      defined(_WIN64) && _WIN64
+// Address space == 64-bit => max 2147483647 values
 #    define ARDUINOJSON_SLOT_OFFSET_SIZE 4
+#  else
+// Address space == 32-bit => max 32767 values
+#    define ARDUINOJSON_SLOT_OFFSET_SIZE 2
 #  endif
-
-#endif  // ARDUINOJSON_EMBEDDED_MODE
+#endif
 
 #ifdef ARDUINO