Properly fix support for stdint.h on Arduino

There are at least two fixes in the codebase already due to macros that
should have come from stdint.h not being defined. I was blaming the
libc, as stdint.h is a C99 header and C99 requires those macros.

Turns out that the Arduino toolchain compiles everything as C++ and
officially C++98 does not have stdint.h, so "anything goes". The Arduino
docs recommend #define'ing __STDC_LIMIT_MACROS to get those macros.

Signed-off-by: Thiago Macieira <[email protected]>

Author: thiagomacieira

src/cborencoder.c

@@ -24,6 +24,10 @@
 
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include "cborconstants_p.h"
 #include "compilersupport_p.h"

src/cborencoder_close_container_checked.c

@@ -24,6 +24,10 @@
 
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include "cborconstants_p.h"
 #include "compilersupport_p.h"

src/cborparser.c

@@ -24,6 +24,10 @@
 
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include "cborconstants_p.h"
 #include "compilersupport_p.h"

src/cborparser_dup_string.c

@@ -24,6 +24,10 @@
 
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include <stdlib.h>
 

src/cborpretty.c

@@ -24,6 +24,10 @@
 
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include "compilersupport_p.h"
 #include "math_support_p.h"

src/cbortojson.c

@@ -26,6 +26,10 @@
 #define _DEFAULT_SOURCE 1
 #define _GNU_SOURCE 1
 #define _POSIX_C_SOURCE 200809L
+#ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+#endif
+
 #include "cbor.h"
 #include "cborjson.h"
 #include "compilersupport_p.h"

src/compilersupport_p.h

@@ -64,10 +64,11 @@
 #define STRINGIFY(x)            STRINGIFY2(x)
 #define STRINGIFY2(x)           #x
 
-#ifndef UINT32_MAX
-/* C99 requires it in stdint.h, but some systems lack it */
-#  define UINT32_MAX    (0xffffffffU)
+#if !defined(UINT32_MAX) || !defined(INT64_MAX)
+/* C89? We can define UINT32_MAX portably, but not INT64_MAX */
+#  error "Your system has stdint.h but that doesn't define UINT32_MAX or INT64_MAX"
 #endif
+
 #ifndef DBL_DECIMAL_DIG
 /* DBL_DECIMAL_DIG is C11 */
 #  define DBL_DECIMAL_DIG       17