Add compile option to disable floating point usage (#114)

This commit adds the option to disable floating point processing in
QCBOR. To disable, the USEFULBUF_DISABLE_ALL_FLOAT preprocessor macro
needs to be defined.

e.g.:

 $ make CMD_LINE="-DUSEFULBUF_DISABLE_ALL_FLOAT"

This removes the capability (and the code) of decoding floating point
types. The type is still recognised, so a meaningful
QCBOR_ERR_ALL_FLOAT_DISABLED error is returned when a floating point value
is encountered in a decoded qcbor. From the encoding interface the
floating point encoding functions are removed.

Change-Id: I371769246f7d83354607de9bce1e7998b8c536a1
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
diff --git a/test/UsefulBuf_Tests.c b/test/UsefulBuf_Tests.c
index 264fbca..b6914d2 100644
--- a/test/UsefulBuf_Tests.c
+++ b/test/UsefulBuf_Tests.c
@@ -1,6 +1,7 @@
 /*==============================================================================
  Copyright (c) 2016-2018, The Linux Foundation.
  Copyright (c) 2018-2021, Laurence Lundblade.
+ Copyright (c) 2021, Arm Limited.
  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -637,16 +638,20 @@
    const uint64_t u64 = 1984738472938472;
    const uint16_t u16 = 40000;
    const uint8_t  u8 = 9;
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    const float    f  = (float)314.15;
    const double   d  = 2.1e10;
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 
    UsefulOutBuf_AppendUint32(&UOB, u32); // Also tests UsefulOutBuf_InsertUint64 and UsefulOutBuf_GetEndPosition
    UsefulOutBuf_AppendUint64(&UOB, u64); // Also tests UsefulOutBuf_InsertUint32
    UsefulOutBuf_AppendUint16(&UOB, u16); // Also tests UsefulOutBuf_InsertUint16
    UsefulOutBuf_AppendByte(&UOB, u8);
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    UsefulOutBuf_AppendFloat(&UOB, f); // Also tests UsefulOutBuf_InsertFloat
    UsefulOutBuf_AppendDouble(&UOB, d); // Also tests UsefulOutBuf_InsertDouble
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
    const UsefulBufC O = UsefulOutBuf_OutUBuf(&UOB);
    if(UsefulBuf_IsNULLC(O))
@@ -678,12 +683,14 @@
    if(UsefulInputBuf_GetByte(&UIB) != u8) {
       return "u8 out then in failed";
    }
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    if(UsefulInputBuf_GetFloat(&UIB) != f) {
       return "float out then in failed";
    }
    if(UsefulInputBuf_GetDouble(&UIB) != d) {
       return "double out then in failed";
    }
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
    // Reset and go again for a few more tests
    UsefulInputBuf_Init(&UIB, O);
@@ -696,6 +703,7 @@
       return "Four compare failed";
    }
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    if(UsefulInputBuf_BytesUnconsumed(&UIB) != 23){
       return "Wrong number of unconsumed bytes";
    }
@@ -707,6 +715,18 @@
    if(UsefulInputBuf_BytesAvailable(&UIB, 24)){
       return "Wrong number of bytes available II";
    }
+#else /* USEFULBUF_DISABLE_ALL_FLOAT */
+   if(UsefulInputBuf_BytesUnconsumed(&UIB) != 11){
+      return "Wrong number of unconsumed bytes";
+   }
+   if(!UsefulInputBuf_BytesAvailable(&UIB, 11)){
+      return "Wrong number of bytes available I";
+   }
+
+   if(UsefulInputBuf_BytesAvailable(&UIB, 12)){
+      return "Wrong number of bytes available II";
+   }
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
    UsefulInputBuf_Seek(&UIB, 0);
 
@@ -737,6 +757,7 @@
 }
 
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 const char *UBUTest_CopyUtil(void)
 {
    if(UsefulBufUtil_CopyFloatToUint32(65536.0F) != 0x47800000) {
@@ -757,6 +778,7 @@
 
    return NULL;
 }
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 
 
diff --git a/test/UsefulBuf_Tests.h b/test/UsefulBuf_Tests.h
index 976de62..0d06206 100644
--- a/test/UsefulBuf_Tests.h
+++ b/test/UsefulBuf_Tests.h
@@ -1,6 +1,7 @@
 /*==============================================================================
  Copyright (c) 2016-2018, The Linux Foundation.
  Copyright (c) 2018, Laurence Lundblade.
+ Copyright (c) 2021, Arm Limited.
  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -45,6 +46,8 @@
 
 const char *  UIBTest_IntegerFormat(void);
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 const char *  UBUTest_CopyUtil(void);
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 #endif
diff --git a/test/float_tests.c b/test/float_tests.c
index 12f34fd..99297c0 100644
--- a/test/float_tests.c
+++ b/test/float_tests.c
@@ -2,6 +2,7 @@
  float_tests.c -- tests for float and conversion to/from half-precision
 
  Copyright (c) 2018-2020, Laurence Lundblade. All rights reserved.
+ Copyright (c) 2021, Arm Limited. All rights reserved.
 
  SPDX-License-Identifier: BSD-3-Clause
 
@@ -648,6 +649,7 @@
          0x18, 0x6A,
           0xFA, 0x00, 0x00, 0x00, 0x00};
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 static const uint8_t spExpectedFloatsNoHalf[] = {
    0x8B,
       0xFB, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -749,6 +751,7 @@
       return 0;
    }
 }
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 
 int32_t GeneralFloatDecodeTests()
@@ -766,133 +769,164 @@
       return -1;
    }
 
-#ifndef QCBOR_DISABLE_PREFERRED_FLOAT
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != 0.0) {
+   if(uErr != FLOAT_ERR_CODE_NO_HALF_PREC(QCBOR_SUCCESS)
+#ifndef QCBOR_DISABLE_PREFERRED_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != 0.0
+#endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
+   ) {
       return -2;
    }
-#else /* QCBOR_DISABLE_PREFERRED_FLOAT */
-   uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_ERR_HALF_PRECISION_DISABLED) {
-      return -3;
-   }
-#endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != 3.14) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != 3.14
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -4;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != 0.0) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != 0.0
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -5;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      !isnan(Item.val.dfnum)) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || !isnan(Item.val.dfnum)
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -6;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != INFINITY) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != INFINITY
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -7;
    }
 
-#ifndef QCBOR_DISABLE_PREFERRED_FLOAT
-   // Tests for normal config
+// Tests for normal config
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != 0.0) {
+   if(uErr != FLOAT_ERR_CODE_NO_HALF_PREC(QCBOR_SUCCESS)
+#ifndef QCBOR_DISABLE_PREFERRED_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != 0.0
+#endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
+   ) {
       return -8;
    }
-#else /* QCBOR_DISABLE_PREFERRED_FLOAT */
-      // Tests for preferred serialization turned off
-      uErr = QCBORDecode_GetNext(&DC, &Item);
-      if(uErr != QCBOR_ERR_HALF_PRECISION_DISABLED) {
-         return -13;
-      }
-#endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
 
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      CHECK_EXPECTED_DOUBLE(3.14, Item.val.dfnum)) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || CHECK_EXPECTED_DOUBLE(3.14, Item.val.dfnum)
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -9;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != 0.0) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != 0.0
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -10;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      !isnan(Item.val.dfnum)) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || !isnan(Item.val.dfnum)
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -11;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_DOUBLE ||
-      Item.val.dfnum != INFINITY) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_DOUBLE
+      || Item.val.dfnum != INFINITY
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -12;
    }
 
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
    // Tests for floating point HW use disabled
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_FLOAT ||
-      CHECK_EXPECTED_DOUBLE(3.14, Item.val.fnum)) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_FLOAT
+      || CHECK_EXPECTED_DOUBLE(3.14, Item.val.fnum)
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -9;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_FLOAT ||
-      Item.val.fnum != 0.0) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_FLOAT
+      || Item.val.fnum != 0.0
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -10;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_FLOAT ||
-      !isnan(Item.val.fnum)) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_FLOAT
+      || !isnan(Item.val.fnum)
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -11;
    }
 
    uErr = QCBORDecode_GetNext(&DC, &Item);
-   if(uErr != QCBOR_SUCCESS ||
-      Item.uDataType != QCBOR_TYPE_FLOAT ||
-      Item.val.fnum != INFINITY) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS)
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.uDataType != QCBOR_TYPE_FLOAT
+      || Item.val.fnum != INFINITY
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+   ) {
       return -12;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
 
+
    /* Sufficent test coverage. Don't need to decode the rest */
 
 
    // Now tests for spiffy decode
    TestData = UsefulBuf_FROM_BYTE_ARRAY_LITERAL(spExpectedFloats);
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    double d;
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
    QCBORDecode_Init(&DC, TestData, 0);
    QCBORDecode_EnterArray(&DC, NULL);
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 #ifndef QCBOR_DISABLE_PREFERRED_FLOAT
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
    // Spiffy decode tests for normal full float support
@@ -1135,6 +1169,7 @@
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
 #endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
    return 0;
 }
diff --git a/test/half_to_double_from_rfc7049.c b/test/half_to_double_from_rfc7049.c
index fce90f7..d4fded6 100644
--- a/test/half_to_double_from_rfc7049.c
+++ b/test/half_to_double_from_rfc7049.c
@@ -3,6 +3,8 @@
  Copyright (c) 2013 IETF Trust and the persons identified as the
  document authors.  All rights reserved.
 
+ Copyright (c) 2021, Arm Limited. All rights reserved.
+
  This document is subject to BCP 78 and the IETF Trust's Legal
  Provisions Relating to IETF Documents
  (http://trustee.ietf.org/license-info) in effect on the date of
@@ -33,6 +35,7 @@
 
 #include <math.h>
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 double decode_half(unsigned char *halfp) {
     int half = (halfp[0] << 8) + halfp[1];
     int exp = (half >> 10) & 0x1f;
@@ -43,3 +46,4 @@
     else val = mant == 0 ? INFINITY : NAN;
     return half & 0x8000 ? -val : val;
 }
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
diff --git a/test/half_to_double_from_rfc7049.h b/test/half_to_double_from_rfc7049.h
index 4642f04..6318f80 100644
--- a/test/half_to_double_from_rfc7049.h
+++ b/test/half_to_double_from_rfc7049.h
@@ -2,6 +2,7 @@
  half_to_double_from_rfc7049.h -- interface to IETF float conversion code.
 
  Copyright (c) 2018-2020, Laurence Lundblade. All rights reserved.
+ Copyright (c) 2021, Arm Limited. All rights reserved.
 
  SPDX-License-Identifier: BSD-3-Clause
 
@@ -13,6 +14,8 @@
 #ifndef half_to_double_from_rfc7049_h
 #define half_to_double_from_rfc7049_h
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 double decode_half(unsigned char *halfp);
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 #endif /* half_to_double_from_rfc7049_h */
diff --git a/test/qcbor_decode_tests.c b/test/qcbor_decode_tests.c
index 4b20e71..aebe492 100644
--- a/test/qcbor_decode_tests.c
+++ b/test/qcbor_decode_tests.c
@@ -1,6 +1,7 @@
 /*==============================================================================
  Copyright (c) 2016-2018, The Linux Foundation.
  Copyright (c) 2018-2021, Laurence Lundblade.
+ Copyright (c) 2021, Arm Limited.
  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -2418,8 +2419,11 @@
       return -4;
    }
    if(Item.uDataType != QCBOR_TYPE_DATE_EPOCH ||
-      Item.val.epochDate.nSeconds != 1400000000 ||
-      Item.val.epochDate.fSecondsFraction != 0 ) {
+      Item.val.epochDate.nSeconds != 1400000000
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || Item.val.epochDate.fSecondsFraction != 0
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+     ) {
       return -5;
    }
 
@@ -2436,7 +2440,9 @@
    }
    if(Item.uDataType != QCBOR_TYPE_DATE_EPOCH ||
       Item.val.epochDate.nSeconds != 1400000001 ||
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
       Item.val.epochDate.fSecondsFraction != 0 ||
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
       !QCBORDecode_IsTagged(&DCtx, &Item, CBOR_TAG_ENC_AS_B64)) {
       return -8;
    }
@@ -2446,14 +2452,18 @@
       return -9;
    }
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
    // Epoch date in float format with fractional seconds
    if((uError = QCBORDecode_GetNext(&DCtx, &Item))) {
       return -10;
    }
    if(Item.uDataType != QCBOR_TYPE_DATE_EPOCH ||
-      Item.val.epochDate.nSeconds != 1 ||
-      CHECK_EXPECTED_DOUBLE(Item.val.epochDate.fSecondsFraction, 0.1 )) {
+      Item.val.epochDate.nSeconds != 1
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
+      || CHECK_EXPECTED_DOUBLE(Item.val.epochDate.fSecondsFraction, 0.1 )
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
+     ) {
       return -11;
    }
 
@@ -2526,6 +2536,7 @@
 #endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
 
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
    return 0;
 }
@@ -2655,11 +2666,11 @@
    QCBORDecode_GetEpochDate(&DC, QCBOR_TAG_REQUIREMENT_TAG, &nEpochDateFail);
    uError = QCBORDecode_GetAndResetError(&DC);
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
-   if(uError != QCBOR_ERR_DATE_OVERFLOW) {
+   if(uError != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_DATE_OVERFLOW)) {
       return 1111;
    }
 #else
-   if(uError != QCBOR_ERR_FLOAT_DATE_DISABLED) {
+   if(uError != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED)) {
       return 1112;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
@@ -2676,12 +2687,12 @@
    uError = QCBORDecode_GetAndResetError(&DC);
 #ifndef QCBOR_DISABLE_PREFERRED_FLOAT
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
-   const QCBORError uExpectedforHalfMinusInfinity = QCBOR_ERR_DATE_OVERFLOW;
+   const QCBORError uExpectedforHalfMinusInfinity = FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_DATE_OVERFLOW);
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
-   const QCBORError uExpectedforHalfMinusInfinity = QCBOR_ERR_FLOAT_DATE_DISABLED;
+   const QCBORError uExpectedforHalfMinusInfinity = FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED);
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
 #else /* QCBOR_DISABLE_PREFERRED_FLOAT */
-   const QCBORError uExpectedforHalfMinusInfinity = QCBOR_ERR_HALF_PRECISION_DISABLED;
+   const QCBORError uExpectedforHalfMinusInfinity = FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_HALF_PRECISION_DISABLED);
 #endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
    if(uError != uExpectedforHalfMinusInfinity) {
       return 2;
@@ -2715,7 +2726,7 @@
    }
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
    uError = QCBORDecode_GetAndResetError(&DC);
-   if(uError != QCBOR_ERR_FLOAT_DATE_DISABLED) {
+   if(uError != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED)) {
       return 102;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
@@ -2729,7 +2740,7 @@
    }
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
    uError = QCBORDecode_GetAndResetError(&DC);
-   if(uError != QCBOR_ERR_FLOAT_DATE_DISABLED) {
+   if(uError != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED)) {
       return 112;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
@@ -2743,7 +2754,7 @@
    }
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
    uError = QCBORDecode_GetAndResetError(&DC);
-   if(uError != QCBOR_ERR_FLOAT_DATE_DISABLED) {
+   if(uError != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED)) {
       return 104;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
@@ -5483,11 +5494,11 @@
    QCBORDecode_GetEpochDateInMapN(&DCtx, 0x04, QCBOR_TAG_REQUIREMENT_TAG, &nInt);
    uErr = QCBORDecode_GetAndResetError(&DCtx);
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
-   if(uErr != QCBOR_ERR_DATE_OVERFLOW) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_DATE_OVERFLOW)) {
       return 2024;
    }
 #else
-   if(uErr != QCBOR_ERR_FLOAT_DATE_DISABLED) {
+   if(uErr != FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_FLOAT_DATE_DISABLED)) {
       return 2027;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
@@ -5831,14 +5842,14 @@
       {(uint8_t[]){0xfb, 0x40, 0x59, 0x13, 0x33, 0x33, 0x33, 0x33, 0x33}, 9},
 #ifndef QCBOR_DISABLE_FLOAT_HW_USE
       100L,
-      QCBOR_SUCCESS,
+      FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS),
       100ULL,
-      QCBOR_SUCCESS,
+      FLOAT_ERR_CODE_NO_FLOAT(QCBOR_SUCCESS),
 #else /* QCBOR_DISABLE_FLOAT_HW_USE */
       0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
+      FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_HW_FLOAT_DISABLED),
       0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
+      FLOAT_ERR_CODE_NO_FLOAT(QCBOR_ERR_HW_FLOAT_DISABLED),
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
       100.3,
       QCBOR_SUCCESS
@@ -5846,50 +5857,32 @@
    {
       "Floating point value NaN 0xfa7fc00000",
       {(uint8_t[]){0xfa, 0x7f, 0xc0, 0x00, 0x00}, 5},
-#ifndef QCBOR_DISABLE_FLOAT_HW_USE
       0,
-      QCBOR_ERR_FLOAT_EXCEPTION,
+      FLOAT_ERR_CODE_NO_FLOAT_HW(QCBOR_ERR_FLOAT_EXCEPTION),
       0,
-      QCBOR_ERR_FLOAT_EXCEPTION,
-#else /* QCBOR_DISABLE_FLOAT_HW_USE */
-      0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
-      0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
-#endif /* QCBOR_DISABLE_FLOAT_HW_USE */
+      FLOAT_ERR_CODE_NO_FLOAT_HW(QCBOR_ERR_FLOAT_EXCEPTION),
       NAN,
       QCBOR_SUCCESS
    },
    {
       "half-precision Floating point value -4",
       {(uint8_t[]){0xf9, 0xc4, 0x00}, 3},
-#ifndef QCBOR_DISABLE_PREFERRED_FLOAT
-#ifndef QCBOR_DISABLE_FLOAT_HW_USE
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
       // Normal case with all enabled.
       -4,
-      QCBOR_SUCCESS,
+      FLOAT_ERR_CODE_NO_HALF_PREC_NO_FLOAT_HW(QCBOR_SUCCESS),
       0,
-      QCBOR_ERR_NUMBER_SIGN_CONVERSION,
+      FLOAT_ERR_CODE_NO_HALF_PREC_NO_FLOAT_HW(QCBOR_ERR_NUMBER_SIGN_CONVERSION),
       -4.0,
-      QCBOR_SUCCESS
-#else /* QCBOR_DISABLE_FLOAT_HW_USE */
-      // Float HW disabled
-      -4,
-      QCBOR_ERR_HW_FLOAT_DISABLED, // Can't convert to integer
+      FLOAT_ERR_CODE_NO_HALF_PREC_NO_FLOAT_HW(QCBOR_SUCCESS)
+#else /* USEFULBUF_DISABLE_ALL_FLOAT */
       0,
-      QCBOR_ERR_HW_FLOAT_DISABLED, // Can't convert to integer
-      -4.0,
-      QCBOR_SUCCESS // Uses ieee754.h to conver, not HW
-#endif /* QCBOR_DISABLE_FLOAT_HW_USE */
-#else /* QCBOR_DISABLE_PREFERRED_FLOAT */
-      // Half-precision disabled
-      -4,
-      QCBOR_ERR_HALF_PRECISION_DISABLED,
+      QCBOR_ERR_ALL_FLOAT_DISABLED,
       0,
-      QCBOR_ERR_HALF_PRECISION_DISABLED,
-      -4.0,
-      QCBOR_ERR_HALF_PRECISION_DISABLED
-#endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
+      QCBOR_ERR_ALL_FLOAT_DISABLED,
+      0,
+      QCBOR_ERR_ALL_FLOAT_DISABLED,
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
    },
    {
       "Decimal fraction 3/10",
@@ -5913,17 +5906,10 @@
    {
       "+inifinity",
       {(uint8_t[]){0xfa, 0x7f, 0x80, 0x00, 0x00}, 5},
-#ifndef QCBOR_DISABLE_FLOAT_HW_USE
       0,
-      QCBOR_ERR_FLOAT_EXCEPTION,
+      FLOAT_ERR_CODE_NO_FLOAT_HW(QCBOR_ERR_FLOAT_EXCEPTION),
       0,
-      QCBOR_ERR_CONVERSION_UNDER_OVER_FLOW,
-#else /* QCBOR_DISABLE_FLOAT_HW_USE */
-      0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
-      0,
-      QCBOR_ERR_HW_FLOAT_DISABLED,
-#endif /* QCBOR_DISABLE_FLOAT_HW_USE */
+      FLOAT_ERR_CODE_NO_FLOAT_HW(QCBOR_ERR_CONVERSION_UNDER_OVER_FLOW),
       INFINITY,
       QCBOR_SUCCESS
    },
@@ -7123,6 +7109,7 @@
       return 4;
    }
 
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
    double uDouble;
    QCBORDecode_GetDoubleConvertAllInMapSZ(&DCtx,
                                           "label2",
@@ -7140,6 +7127,7 @@
       return 7;
    }
 #endif /* QCBOR_DISABLE_FLOAT_HW_USE */
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
 
 
    QCBORDecode_ExitMap(&DCtx);
diff --git a/test/run_tests.c b/test/run_tests.c
index 53d83f6..be2582f 100644
--- a/test/run_tests.c
+++ b/test/run_tests.c
@@ -2,6 +2,7 @@
  run_tests.c -- test aggregator and results reporting
 
  Copyright (c) 2018-2021, Laurence Lundblade. All rights reserved.
+ Copyright (c) 2021, Arm Limited. All rights reserved.
 
  SPDX-License-Identifier: BSD-3-Clause
 
@@ -51,7 +52,9 @@
 
 
 static test_entry2 s_tests2[] = {
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
     TEST_ENTRY(UBUTest_CopyUtil),
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
     TEST_ENTRY(UOBTest_NonAdversarial),
     TEST_ENTRY(TestBasicSanity),
     TEST_ENTRY(UOBTest_BoundaryConditionsTest),
@@ -114,7 +117,9 @@
     TEST_ENTRY(DoubleAsSmallestTest),
     TEST_ENTRY(HalfPrecisionAgainstRFCCodeTest),
 #endif /* QCBOR_DISABLE_PREFERRED_FLOAT */
+#ifndef USEFULBUF_DISABLE_ALL_FLOAT
     TEST_ENTRY(GeneralFloatEncodeTests),
+#endif /* USEFULBUF_DISABLE_ALL_FLOAT */
     TEST_ENTRY(GeneralFloatDecodeTests),
     TEST_ENTRY(BstrWrapTest),
     TEST_ENTRY(BstrWrapErrorTest),