[edk2-devel] [PATCH v2] RedfishPkg/RedfishCrtLib: handle floating point number in JSON

["Nickle Wang via groups.io" <nicklew=nvidia.com@groups.io>]

When the value type is defined as number in Redfish schema, floating
point number is allowed. RedfishCrtLib raises assert without handling
this case now. Follow the way in EDK2 to call AsciiStrDecimalToUintnS
and handle the floating point number. Only the integer value is
returned.

Signed-off-by: Nickle Wang <nicklew@nvidia.com>
Cc: Abner Chang <abner.chang@amd.com>
Cc: Igor Kulchytskyy <igork@ami.com>
Cc: Nick Ramirez <nramirez@nvidia.com>
---
 RedfishPkg/Library/JsonLib/load.c             |  5 +--
 .../RedfishCrtLib/RedfishCrtLib.c             | 32 ++++++++++++++++---
 2 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/RedfishPkg/Library/JsonLib/load.c b/RedfishPkg/Library/JsonLib/load.c
index 958c3ea8c5..1a3b4a6e6a 100644
--- a/RedfishPkg/Library/JsonLib/load.c
+++ b/RedfishPkg/Library/JsonLib/load.c
@@ -5,6 +5,7 @@
  * it under the terms of the MIT license. See LICENSE for details.
 
  (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+ Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
     SPDX-License-Identifier: BSD-2-Clause-Patent AND MIT
  */
@@ -717,8 +718,8 @@ lex_scan_number (
     goto out;
   }
 
-  lex->token      = TOKEN_REAL;
-  lex->value.real = doubleval;
+  lex->token         = TOKEN_INTEGER;
+  lex->value.integer = doubleval;
   return 0;
 
 out:
diff --git a/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c b/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
index 57a997f351..902dd0b3a0 100644
--- a/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
+++ b/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
@@ -4,6 +4,7 @@
 
   Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
   (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+  Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
     SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -519,7 +520,7 @@ strtoull (
 }
 
 /**
-  edk2 Jansson port does not support doubles, simply return 0.
+  edk2 Jansson port does not support doubles, simply return integer part.
 
   These conversion functions convert the initial portion of the string
   pointed to by nptr to double, float, and long double representation,
@@ -540,7 +541,7 @@ strtoull (
   the return value), and ERANGE is stored in errno.  If the correct value
   would cause underflow, zero is returned and ERANGE is stored in errno.
 
-  @return  Return 0.
+  @return  Integer part of decimal number.
 **/
 double
 strtod (
@@ -548,9 +549,30 @@ strtod (
   char **__restrict       endptr
   )
 {
-  DEBUG ((DEBUG_ERROR, "We don't supprot double type on edk2 yet!"));
-  ASSERT (FALSE);
-  return (double)0;
+  UINTN  Data;
+  UINTN  StrLen;
+
+  Data   = 0;
+  StrLen = 0;
+
+  if (nptr == NULL) {
+    return (double)0;
+  }
+
+  AsciiStrDecimalToUintnS (nptr, NULL, &Data);
+  DEBUG ((DEBUG_WARN, "%a: \"%a\" We don't support double type on edk2 yet. Only integer part is returned: %d\n", __func__, nptr, Data));
+
+  //
+  // Force endptr to the last position of nptr because caller may
+  // check endptr and raise assertion. We don't support floating
+  // number in edk2 so this prevents unecessary assertion from happening.
+  //
+  if (endptr != NULL) {
+    StrLen  = AsciiStrLen (nptr);
+    *endptr = (char *__restrict)nptr + StrLen;
+  }
+
+  return (double)Data;
 }
 
 static UINT8  BitMask[] = {
-- 
2.34.1



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