Expand loops for debugging.

Author: Lethja

xtra/DIFF.LUA

@@ -14,7 +14,16 @@ local function diff_u(fn1,fn2)
 		local l1,c1,o1,l2,c2,o2,b1,e,b2,f=string.unpack(PF,f1,(x-1)*ps+1)l2,c2,o2=string.unpack(PF,f2,(y-1)*ps+1)if l1~=l2 or c1~=c2 then return false end
 		local function li(fn,o,l)f,e=io.open(fn,"rb")if not f then return nil,e end f:seek(S,o)local g=f:read(l)f:close()return g end
 		b1,e,b2=li(fn1,o1,l1)if not b1 then error(e)end b2,e=li(fn2,o2,l2)if not b2 then error(e)end return b1==b2 end
-	h,w,m=#f1//ps,#f2//ps,{}for x=1,h do for y=1,w do if cmp(x,y)then table.insert(m,{y=y,x=x})end end end
+	h,w,la,m=#f1//ps,#f2//ps,1,{}
+	for x=1,h do
+		for y=la,w do
+			if cmp(x,y)then
+				table.insert(m,{y=y,x=x})
+				la=y
+				break
+			end
+		end
+	end la=nil
 	local function get(fn,p,x)local l,_,o,f,r=string.unpack(PF,p,(x-1)*ps+1)f=assert(io.open(fn,"rb"))f:seek(S,o)r=f:read(l)f:close()return r end
 	local function pfl(p,s)return(p..s:gsub('\n$',''):gsub('\r$',''))end
 	local function flush()if #u.l>0 then if u.e>=4 then table.remove(u.l)u.o.l,u.n.l=u.o.l-1,u.n.l-1 end
@@ -23,12 +32,28 @@ local function diff_u(fn1,fn2)
 		for _,v in ipairs(u.l)do print(v)end end u=nil end
 	local function init()if not u then local k,l=math.max(i-3,1),math.max(j-3,1)u={e=0,l={},o={s=k,l=0},n={s=l,l=0}}
 		for z=k,i-1 do table.insert(u.l,pfl(" ",get(fn1,f1,z)))u.o.l,u.n.l=u.o.l+1,u.n.l+1 end end end
-	local k=2 while k<=#m do if m[k].x>m[k-1].x then table.remove(m,k-1)else k=k+1 end end
+	--local k=2 while k<=#m do if m[k].x>m[k-1].x then table.remove(m,k-1)else k=k+1 end end
 	--TODO: convert to sequences
 	for _,p in ipairs(m)do
-		while i<p.x do init()table.insert(u.l,pfl("-",get(fn1,f1,i)))i,u.o.l,u.e=i+1,u.o.l+1,0 end
-		while j<p.y do init()table.insert(u.l,pfl("+",get(fn2,f2,j)))j,u.n.l,u.e=j+1,u.n.l+1,0 end
-		if u then if u.e<4 and i<=h then table.insert(u.l,pfl(" ",get(fn1,f1,i)))u.e,u.o.l,u.n.l=u.e+1,u.o.l+1,u.n.l+1 else flush()end end i,j=i+1,j+1 end
+		while i<p.x do
+			init()
+			table.insert(u.l,pfl("-",get(fn1,f1,i)))
+			i,u.o.l,u.e=i+1,u.o.l+1,0
+		end
+		while j<p.y do
+			init()
+			table.insert(u.l,pfl("+",get(fn2,f2,j)))
+			j,u.n.l,u.e=j+1,u.n.l+1,0
+		end
+		if u then
+			if u.e<4 and i<=h then
+				table.insert(u.l,pfl(" ",get(fn1,f1,i)))
+				u.e,u.o.l,u.n.l=u.e+1,u.o.l+1,u.n.l+1
+			else
+				flush()
+			end
+		end i,j=i+1,j+1
+	end
 	local function nlc()if la then la=la:sub(-1)if la~='\n'and la~='\r'then table.insert(u.l,"\\ No newline at end of file")end end end
 	while i<=h do init()la=get(fn1,f1,i,ps)table.insert(u.l,pfl("-",la))i,u.o.l,u.e=i+1,u.o.l+1,0 end nlc()
 	while j<=w do init()la=get(fn2,f2,j,ps)table.insert(u.l,pfl("+",la))j,u.n.l,u.e=j+1,u.n.l+1,0 end nlc()