From 4df2871a46647a5b2d98508e3548241430b68822 Mon Sep 17 00:00:00 2001
From: ThaCuber <70547062+thacuber2a03@users.noreply.github.com>
Date: Wed, 19 Jun 2024 22:02:12 -0400
Subject: [PATCH] improve number highlighting for c (#1752)

* improve number highlighting for c

* add unsigned suffix

* add long suffixes

* reorder octal literals and add suffix for hex numbers

* fix integer and float suffixes
too many characters, send help
---
 data/plugins/language_c.lua | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/data/plugins/language_c.lua b/data/plugins/language_c.lua
index c15466be..2804fb7b 100644
--- a/data/plugins/language_c.lua
+++ b/data/plugins/language_c.lua
@@ -1,6 +1,11 @@
 -- mod-version:3
 local syntax = require "core.syntax"
 
+-- integer suffix combinations as a regex
+local isuf = [[(?:[lL][uU]|ll[uU]|LL[uU]|[uU][lL]\b|[uU]ll|[uU]LL|[uU]|[lL]\b|ll|LL)?]]
+-- float suffix combinations as a Lua pattern / regex
+local fsuf = "[fFlL]?"
+
 syntax.add {
   name = "C",
   files = { "%.c$" },
@@ -11,9 +16,13 @@ syntax.add {
     { pattern = { "/%*", "%*/" },        type = "comment" },
     { pattern = { '"', '"', '\\' },      type = "string"  },
     { pattern = { "'", "'", '\\' },      type = "string"  },
-    { pattern = "0x%x+",                 type = "number"  },
-    { pattern = "%d+[%d%.eE]*f?",        type = "number"  },
-    { pattern = "%.?%d+f?",              type = "number"  },
+    { regex   = "0x[0-9a-fA-f]+"..isuf,  type = "number"  },
+    { regex   = "0()[0-7]+"..isuf,       type = { "keyword", "number" } },
+    { pattern = "%d+%.%d*[Ee]%d+"..fsuf, type = "number"  },
+    { pattern = "%d+[Ee]%d+"..fsuf,      type = "number"  },
+    { pattern = "%d+%.%d*"..fsuf,        type = "number"  },
+    { pattern = "%.%d+"..fsuf,           type = "number"  },
+    { regex   = "\\d+"..isuf,            type = "number"  },
     { pattern = "[%+%-=/%*%^%%<>!~|&]",  type = "operator" },
     { pattern = "##",                    type = "operator" },
     { pattern = "struct%s()[%a_][%w_]*", type = {"keyword", "keyword2"} },