From 3348d03f95ff8d041981af54e93144efb9e146a2 Mon Sep 17 00:00:00 2001
From: Juha Niskanen <juha.niskanen@haltian.com>
Date: Tue, 23 Apr 2024 09:02:35 +0300
Subject: [PATCH] libs/libc/inttypes: add support for imaxdiv

Signed-off-by: Juha Niskanen <juha.niskanen@haltian.com>
---
 include/inttypes.h                |  8 ++++++-
 libs/libc/inttypes/CMakeLists.txt |  3 ++-
 libs/libc/inttypes/Make.defs      |  2 +-
 libs/libc/inttypes/lib_imaxdiv.c  | 39 +++++++++++++++++++++++++++++++
 4 files changed, 49 insertions(+), 3 deletions(-)
 create mode 100644 libs/libc/inttypes/lib_imaxdiv.c

diff --git a/include/inttypes.h b/include/inttypes.h
index 056ad4ea62..58b1e6af93 100644
--- a/include/inttypes.h
+++ b/include/inttypes.h
@@ -348,7 +348,13 @@
  *   function.
  */
 
-typedef void *imaxdiv_t; /* Dummy type since imaxdiv is not yet supported */
+struct imaxdiv_s
+{
+  intmax_t quot;
+  intmax_t rem;
+};
+
+typedef struct imaxdiv_s imaxdiv_t;
 
 /****************************************************************************
  * Public Function Prototypes
diff --git a/libs/libc/inttypes/CMakeLists.txt b/libs/libc/inttypes/CMakeLists.txt
index 14239dfde9..aaf5f6dbfb 100644
--- a/libs/libc/inttypes/CMakeLists.txt
+++ b/libs/libc/inttypes/CMakeLists.txt
@@ -18,4 +18,5 @@
 #
 # ##############################################################################
 
-target_sources(c PRIVATE lib_imaxabs.c lib_strtoimax.c lib_strtoumax.c)
+target_sources(c PRIVATE lib_imaxabs.c lib_imaxdiv.c lib_strtoimax.c
+                         lib_strtoumax.c)
diff --git a/libs/libc/inttypes/Make.defs b/libs/libc/inttypes/Make.defs
index 6c69030204..48c7e7661e 100644
--- a/libs/libc/inttypes/Make.defs
+++ b/libs/libc/inttypes/Make.defs
@@ -20,7 +20,7 @@
 
 # Add the inttypes C files to the build
 
-CSRCS += lib_imaxabs.c lib_strtoimax.c lib_strtoumax.c
+CSRCS += lib_imaxabs.c lib_imaxdiv.c lib_strtoimax.c lib_strtoumax.c
 
 # Add the inttypes directory to the build
 
diff --git a/libs/libc/inttypes/lib_imaxdiv.c b/libs/libc/inttypes/lib_imaxdiv.c
new file mode 100644
index 0000000000..86055bd216
--- /dev/null
+++ b/libs/libc/inttypes/lib_imaxdiv.c
@@ -0,0 +1,39 @@
+/****************************************************************************
+ * libs/libc/inttypes/lib_imaxdiv.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <inttypes.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+imaxdiv_t imaxdiv(intmax_t numer, intmax_t denom)
+{
+  imaxdiv_t f;
+
+  f.quot = numer / denom;
+  f.rem  = numer % denom;
+  return f;
+}