[gnunet] branch master updated: NEWS: add support for encoding/decoding double values as part of JSON to libgnunetjson

[gnunet]

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grothoff pushed a commit to branch master
in repository gnunet.

The following commit(s) were added to refs/heads/master by this push:
     new e1a3225cd NEWS: add support for encoding/decoding double values as 
part of JSON to libgnunetjson
e1a3225cd is described below

commit e1a3225cda96b8fd99d437ba3c53a9badd341693
Author: Christian Grothoff <grothoff@gnunet.org>
AuthorDate: Fri Oct 13 23:51:45 2023 +0200

    NEWS: add support for encoding/decoding double values as part of JSON to 
libgnunetjson
---
 src/include/gnunet_json_lib.h | 24 ++++++++++++++++++++++++
 src/json/json_helper.c        | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/json/json_pack.c          | 13 +++++++++++++
 3 files changed, 80 insertions(+)

diff --git a/src/include/gnunet_json_lib.h b/src/include/gnunet_json_lib.h
index 26c68fed3..c3204026b 100644
--- a/src/include/gnunet_json_lib.h
+++ b/src/include/gnunet_json_lib.h
@@ -290,6 +290,17 @@ GNUNET_JSON_spec_bool (const char *name,
                        bool *b);
 
 
+/**
+ * double.
+ *
+ * @param name name of the JSON field
+ * @param[out] f where to store the double found under @a name
+ */
+struct GNUNET_JSON_Specification
+GNUNET_JSON_spec_double (const char *name,
+                         double *f);
+
+
 /**
  * 8-bit integer.
  *
@@ -702,6 +713,19 @@ GNUNET_JSON_pack_bool (const char *name,
                        bool b);
 
 
+/**
+ * Generate packer instruction for a JSON field of type
+ * double.
+ *
+ * @param name name of the field to add to the object
+ * @param f double value
+ * @return json pack specification
+ */
+struct GNUNET_JSON_PackSpec
+GNUNET_JSON_pack_double (const char *name,
+                         double f);
+
+
 /**
  * Generate packer instruction for a JSON field of type
  * string.
diff --git a/src/json/json_helper.c b/src/json/json_helper.c
index 515cc4c7f..4795285f4 100644
--- a/src/json/json_helper.c
+++ b/src/json/json_helper.c
@@ -489,6 +489,49 @@ GNUNET_JSON_spec_bool (const char *name,
 }
 
 
+/**
+ * Parse given JSON object to a double.
+ *
+ * @param cls closure, NULL
+ * @param root the json object representing data
+ * @param[out] spec where to write the data
+ * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
+ */
+static enum GNUNET_GenericReturnValue
+parse_double (void *cls,
+              json_t *root,
+              struct GNUNET_JSON_Specification *spec)
+{
+  double *f = spec->ptr;
+
+  if (! json_is_real (root))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  *f = json_real_value (root);
+  return GNUNET_OK;
+}
+
+
+struct GNUNET_JSON_Specification
+GNUNET_JSON_spec_double (const char *name,
+                         double *f)
+{
+  struct GNUNET_JSON_Specification ret = {
+    .parser = &parse_double,
+    .cleaner = NULL,
+    .cls = NULL,
+    .field = name,
+    .ptr = f,
+    .ptr_size = sizeof(double),
+    .size_ptr = NULL
+  };
+
+  return ret;
+}
+
+
 /**
  * Parse given JSON object to a uint8_t.
  *
diff --git a/src/json/json_pack.c b/src/json/json_pack.c
index 816373eaf..18487c3f4 100644
--- a/src/json/json_pack.c
+++ b/src/json/json_pack.c
@@ -98,6 +98,19 @@ GNUNET_JSON_pack_bool (const char *name,
 }
 
 
+struct GNUNET_JSON_PackSpec
+GNUNET_JSON_pack_double (const char *name,
+                         double f)
+{
+  struct GNUNET_JSON_PackSpec ps = {
+    .field_name = name,
+    .object = json_real (f)
+  };
+
+  return ps;
+}
+
+
 struct GNUNET_JSON_PackSpec
 GNUNET_JSON_pack_string (const char *name,
                          const char *s)

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