Replace /proc/num2hex with a much faster macro. (#19600)

code/__DEFINES/_math.dm

@@ -242,3 +242,5 @@
 
 // Gives you the percent of two inputs
 #define PERCENT_OF(val1, val2) (val1 * (val2 / 100))
+
+#define num2hex(X, len) uppertext(num2text(X, len, 16))

code/__HELPERS/type2type.dm

@@ -42,23 +42,6 @@
 		i--
 	return num
 
-//Returns the hex value of a number given a value assumed to be a base-ten value
-/proc/num2hex(num, placeholder = 2)
-	if(!isnum(num) || num < 0)
-		return
-
-	var/hex = ""
-	while(num)
-		var/val = num % 16
-		num = round(num / 16)
-
-		if(val > 9)
-			val = ascii2text(55 + val) // 65 - 70 correspond to "A" - "F"
-		hex = "[val][hex]"
-	while(length(hex) < placeholder)
-		hex = "0[hex]"
-	return hex || "0"
-
 //Returns an integer value for R of R/G/B given a hex color input.
 /proc/color2R(hex)
 	if(!(istext(hex)))

code/__HELPERS/unsorted.dm

@@ -1378,9 +1378,7 @@ Standard way to write links -Sayu
 		colour = pick(list("FF0000","FF7F00","FFFF00","00FF00","0000FF","4B0082","8F00FF"))
 	else
 		for(var/i=1;i<=3;i++)
-			var/temp_col = "[num2hex(rand(lower,upper))]"
-			if(length(temp_col )<2)
-				temp_col  = "0[temp_col]"
+			var/temp_col = "[num2hex(rand(lower,upper), 2)]"
 			colour += temp_col
 	return colour
 

code/game/dna/dna2.dm

@@ -363,7 +363,7 @@ GLOBAL_LIST_EMPTY(bad_blocks)
 
 
 /proc/EncodeDNABlock(value)
-	return add_zero2(num2hex(value, 1), 3)
+	return num2hex(value, 3)
 
 /datum/dna/proc/UpdateUI()
 	uni_identity = ""

code/game/machinery/computer/security.dm

@@ -189,7 +189,7 @@
 				return
 			var/datum/data/record/G = new /datum/data/record()
 			G.fields["name"] = "New Record"
-			G.fields["id"] = "[add_zero(num2hex(rand(1, 1.6777215E7)), 6)]"
+			G.fields["id"] = "[num2hex(rand(1, 1.6777215E7), 6)]"
 			G.fields["rank"] = "Unassigned"
 			G.fields["real_rank"] = "Unassigned"
 			G.fields["sex"] = "Male"

code/modules/reagents/chemistry/reagents/misc.dm

@@ -329,7 +329,7 @@
 	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		if(!(NO_BLOOD in H.dna.species.species_traits) && !H.dna.species.exotic_blood)
-			H.dna.species.blood_color = "#[num2hex(rand(0, 255))][num2hex(rand(0, 255))][num2hex(rand(0, 255))]"
+			H.dna.species.blood_color = "#[num2hex(rand(0, 255), 2)][num2hex(rand(0, 255), 2)][num2hex(rand(0, 255), 2)]"
 	return ..()
 
 /datum/reagent/colorful_reagent/reaction_mob(mob/living/simple_animal/M, method=REAGENT_TOUCH, volume)