gnu: Add yyjson.

* gnu/packages/c.scm (yyjson): New variable.

Change-Id: Ica9ff2e1b6676aa8761eb33cbab76154f17e443f
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/c.scm

@@ -22,6 +22,7 @@
 ;;; Copyright © 2023, 2024 Foundation Devices, Inc. <hello@foundation.xyz>
 ;;; Copyright © 2023, 2024 David Elsing <david.elsing@posteo.net>
 ;;; Copyright @ 2022, Kitzman <kitzman@disroot.org>
+;;; Copyright @ 2025 Dariqq <dariqq@posteo.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1764,3 +1765,46 @@ (define-public pcg-c
 Linear Congruential Generator (LCG) with a permutation function to increase
 output randomness while retaining speed, simplicity, and conciseness.")
       (license (list license:expat license:asl2.0))))) ; dual licensed
+
+(define-public yyjson
+  (package
+    (name "yyjson")
+    (version "0.10.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/ibireme/yyjson")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0kmzgs24v0rxlibg4qwlm6yplzs96pgxb1gyviijhkra9z7lx7ws"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:configure-flags #~(list "-DBUILD_SHARED_LIBS=ON"
+                                "-DYYJSON_BUILD_TESTS=ON")))
+    (home-page "https://github.com/ibireme/yyjson")
+    (synopsis "C implementation of JSON RFC 8259")
+    (description
+     "This package provides an implementation of JSON in ANSI C as specified
+in RFC 8259.
+Features:
+@itemize
+@item Fast: can read or write gigabytes per second JSON data on modern CPUs.
+@item Portable: complies with ANSI C (C89) for cross-platform compatibility.
+@item Strict: complies with
+@url{https://datatracker.ietf.org/doc/html/rfc8259,RFC 8259} JSON standard,
+ensuring strict number format and UTF-8 validation.
+@item Extendable: offers options to allow comments, trailing commas, NaN/Inf,
+ and custom memory allocator.
+@item Accuracy: can accurately read and write @code{int64}, @code{uint64}, and
+@code{double} numbers.
+@item Flexible: supports unlimited JSON nesting levels, @code{\\u0000}
+characters, and non null-terminated strings.
+@item Manipulation: supports querying and modifying using JSON Pointer,
+JSON Patch and JSON Merge Patch.
+@item Developer-Friendly: easy integration with only one @code{.h} and one
+@code{.c} file.
+@end itemize")
+    (license license:expat)))