half/full-FP support changes

- Make half float encode/decode conditional
- Change defaults for CBOR_WITHOUT_OPEN_MEMSTREAM,
  CBOR_NO_HALF_FLOAT_TYPE and CBOR_NO_FLOATING_POINT
  to y so that half float, float and open
  memstream support along with newlib libc does not
  get compiled in
- src/cborpretty.c, src/cbortojson.c and src/cborvalidation.c
  conditionally include math.h and half float type support
- Conditionally include math.h in src/compilersupport_p.h to avoid
  newlib libc from getting compiled in
- Conditionally compile src/cborparser_dup_string.c if newlib libc is
  compiled in

Signed-off-by: Vipul Rahane <vipulrahane@apache.org>

Makefile

@@ -101,7 +101,7 @@ endif
 # version using funopen or fopencookie
 ifeq ($(open_memstream-pass),)
   ifeq ($(funopen-pass)$(fopencookie-pass),)
-    CFLAGS += -DWITHOUT_OPEN_MEMSTREAM
+    CFLAGS += -DCBOR_WITHOUT_OPEN_MEMSTREAM
     $(warning warning: funopen and fopencookie unavailable, open_memstream can not be implemented and conversion to JSON will not work properly!)
   else
     TINYCBOR_SOURCES += src/open_memstream.c

src/cbor.h

@@ -208,7 +208,7 @@ struct CborEncoder
 {
     cbor_encoder_writer *writer;
     void *writer_arg;
-#ifndef NO_DFLT_WRITER
+#ifndef CBOR_NO_DFLT_WRITER
     struct cbor_buf_writer wr;
 #endif
     size_t remaining;
@@ -219,7 +219,7 @@ typedef struct CborEncoder CborEncoder;
 
 static const size_t CborIndefiniteLength = SIZE_MAX;
 
-#ifndef NO_DFLT_WRITER
+#ifndef CBOR_NO_DFLT_WRITER
 CBOR_API void cbor_encoder_init(CborEncoder *encoder, uint8_t *buffer, size_t size, int flags);
 #endif
 CBOR_API void cbor_encoder_cust_writer_init(CborEncoder *encoder, struct cbor_encoder_writer *w, int flags);
@@ -267,7 +267,7 @@ enum CborParserIteratorFlags
 
 struct CborParser
 {
-#ifndef NO_DFLT_READER
+#ifndef CBOR_NO_DFLT_READER
     struct cbor_buf_reader br;
 #endif
     struct cbor_decoder_reader *d;
@@ -288,7 +288,7 @@ struct CborValue
 };
 typedef struct CborValue CborValue;
 
-#ifndef NO_DFLT_READER
+#ifndef CBOR_NO_DFLT_READER
 CBOR_API CborError cbor_parser_init(const uint8_t *buffer, size_t size, int flags, CborParser *parser, CborValue *it);
 #endif
 CBOR_API CborError cbor_parser_cust_reader_init(struct cbor_decoder_reader *r, int flags, CborParser *parser, CborValue *it);

src/cborencoder.c

@@ -196,7 +196,7 @@
  * Structure used to encode to CBOR.
  */
 
-#ifndef NO_DFLT_WRITER
+#ifndef CBOR_NO_DFLT_WRITER
 /**
  * Initializes a CborEncoder structure \a encoder by pointing it to buffer \a
  * buffer of size \a size. The \a flags field is currently unused and must be
@@ -223,7 +223,7 @@ void cbor_encoder_cust_writer_init(CborEncoder *encoder, struct cbor_encoder_wri
 }
 
 
-#ifndef NO_FLOAT_SUPPORT
+#ifndef CBOR_NO_FLOATING_POINT
 static inline void put16(void *where, uint16_t v)
 {
     v = cbor_htons(v);
@@ -242,7 +242,7 @@ static inline bool isOomError(CborError err)
     return true;
 }
 
-#ifndef NO_FLOAT_SUPPORT
+#ifndef CBOR_NO_FLOATING_POINT
 static inline void put32(void *where, uint32_t v)
 {
     v = cbor_htonl(v);
@@ -363,7 +363,7 @@ CborError cbor_encode_simple_value(CborEncoder *encoder, uint8_t value)
     return encode_number(encoder, value, SimpleTypesType << MajorTypeShift);
 }
 
-#ifndef NO_FLOAT_SUPPORT
+#ifndef CBOR_NO_FLOATING_POINT
 /**
  * Appends the floating-point value of type \a fpType and pointed to by \a
  * value to the CBOR stream provided by \a encoder. The value of \a fpType must
@@ -453,7 +453,7 @@ static CborError create_container(CborEncoder *encoder, CborEncoder *container,
 {
     CborError err;
     container->writer = encoder->writer;
-#ifndef NO_DFLT_WRITER
+#ifndef CBOR_NO_DFLT_WRITER
     container->wr.end = encoder->wr.end;
 #endif
     saturated_decrement(encoder);
@@ -540,7 +540,7 @@ CborError cbor_encoder_close_container(CborEncoder *encoder, const CborEncoder *
     if (containerEncoder->remaining != 1)
         return containerEncoder->remaining == 0 ? CborErrorTooManyItems : CborErrorTooFewItems;
 
-#ifndef NO_DFLT_WRITER
+#ifndef CBOR_NO_DFLT_WRITER
     if (!encoder->wr.end) {
         return CborErrorOutOfMemory;
     }

src/cborparser.c

@@ -303,7 +303,8 @@ static CborError preparse_next_value(CborValue *it)
 static CborError advance_internal(CborValue *it)
 {
     uint64_t length;
-    CborError err = _cbor_value_extract_number(it->parser, &it->offset,  &length);
+    CborError err;
+    err = _cbor_value_extract_number(it->parser, &it->offset,  &length);
     cbor_assert(err == CborNoError);
 
     if (it->type == CborByteStringType || it->type == CborTextStringType) {
@@ -342,7 +343,7 @@ uint64_t _cbor_value_decode_int64_internal(const CborValue *value)
         return value->parser->d->get64(value->parser->d, value->offset + 1);
 }
 
-#ifndef NO_DFLT_READER
+#ifndef CBOR_NO_DFLT_READER
 /**
  * Initializes the CBOR parser for parsing \a size bytes beginning at \a
  * buffer. Parsing will use flags set in \a flags. The iterator to the first

src/cborpretty.c

@@ -33,9 +33,11 @@
 #include "cborinternal_p.h"
 #include "utf8_p.h"
 
-#include <float.h>
 #include <inttypes.h>
+#include <float.h>
+#ifndef CBOR_NO_FLOATING_POINT
 #include <math.h>
+#endif
 #include <string.h>
 
 /**
@@ -457,7 +459,7 @@ static CborError value_to_pretty(CborStreamFunction stream, void *out, CborValue
         err = stream(out, val ? "true" : "false");
         break;
     }
-#ifndef NO_FLOAT_SUPPORT
+#ifndef CBOR_NO_FLOATING_POINT
     case CborDoubleType: {
         const char *suffix;
         double val;
@@ -468,12 +470,14 @@ static CborError value_to_pretty(CborStreamFunction stream, void *out, CborValue
             cbor_value_get_float(it, &f);
             val = f;
             suffix = flags & CborPrettyNumericEncodingIndicators ? "_2" : "f";
+#ifndef CBOR_NO_HALF_FLOAT_TYPE
         } else if (false) {
             uint16_t f16;
     case CborHalfFloatType:
             cbor_value_get_half_float(it, &f16);
             val = decode_half(f16);
             suffix = flags & CborPrettyNumericEncodingIndicators ? "_1" : "f16";
+#endif
         } else {
             cbor_value_get_double(it, &val);
             suffix = "";

src/cbortojson.c

@@ -36,7 +36,9 @@
 
 #include <float.h>
 #include <inttypes.h>
+#ifndef CBOR_NO_FLOATING_POINT
 #include <math.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -401,7 +403,7 @@ static CborError stringify_map_key(char **key, CborValue *it, int flags, CborTyp
 {
     (void)flags;    /* unused */
     (void)type;     /* unused */
-#ifdef WITHOUT_OPEN_MEMSTREAM
+#ifdef CBOR_WITHOUT_OPEN_MEMSTREAM
     (void)key;      /* unused */
     (void)it;       /* unused */
     return CborErrorJsonNotImplemented;
@@ -592,7 +594,7 @@ static CborError value_to_json(FILE *out, CborValue *it, int flags, CborType typ
             return CborErrorIO;
         break;
     }
-#ifndef NO_FLOAT_SUPPORT
+#ifndef CBOR_NO_FLOATING_POINT
     case CborDoubleType: {
         double val;
         if (false) {
@@ -601,12 +603,14 @@ static CborError value_to_json(FILE *out, CborValue *it, int flags, CborType typ
             status->flags = TypeWasNotNative;
             cbor_value_get_float(it, &f);
             val = f;
+#ifndef CBOR_NO_HALF_FLOAT_TYPE
         } else if (false) {
             uint16_t f16;
     case CborHalfFloatType:
             status->flags = TypeWasNotNative;
             cbor_value_get_half_float(it, &f16);
             val = decode_half(f16);
+#endif
         } else {
             cbor_value_get_double(it, &val);
         }

src/cborvalidation.c

@@ -39,9 +39,9 @@
 
 #include <string.h>
 
+#include <float.h>
 #ifndef CBOR_NO_FLOATING_POINT
-#  include <float.h>
-#  include <math.h>
+#include <math.h>
 #endif
 
 

src/compilersupport_p.h

@@ -41,7 +41,9 @@ extern "C" {
 #  include <assert.h>
 #endif
 #include <float.h>
+#ifndef CBOR_NO_FLOATING_TYPE
 #include <math.h>
+#endif
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
@@ -203,6 +205,7 @@ static inline bool add_check_overflow(size_t v1, size_t v2, size_t *r)
 #endif
 }
 
+#ifndef CBOR_NO_HALF_FLOAT_TYPE
 static inline unsigned short encode_half(double val)
 {
 #ifdef __F16C__
@@ -255,6 +258,8 @@ static inline double decode_half(unsigned short half)
 #endif
 }
 
+#endif
+
 #ifdef __cplusplus
 }
 #endif

src/open_memstream.c

@@ -26,7 +26,7 @@
 #define _DEFAULT_SOURCE 1
 #define _GNU_SOURCE 1
 
-#ifndef WITHOUT_OPEN_MEMSTREAM
+#ifndef CBOR_WITHOUT_OPEN_MEMSTREAM
 
 #include <sys/types.h>
 #include <errno.h>