Fix counting of rows

- since data for each Transformer is spread over
  multiple lines, we can now have a line start with '0'
  and it not indicate the end of the section (since
  it in the middle of the data for a Transformer, not
  the start of a new record).

src/parsing.jl

@@ -114,7 +114,10 @@ function count_nrow(buf, pos, len, options)
         pos += res.tlen
         if newline(res.code) || eof(res.code)
             nlines += 1
-            if eof(buf, pos, len) || peekbyte(buf, pos) == UInt8('0')
+            if eof(buf, pos, len) || (
+                !eof(buf, pos, len) && peekbyte(buf, pos) == UInt8('0') &&
+                !eof(buf, pos+1, len) && peekbyte(buf, pos+1) == UInt8(' ')
+            )
                 break
             end
         end

test/runtests.jl

@@ -144,14 +144,17 @@ using Test
         @test branches.ckt[2] == "6 "
 
         transformers = net2.two_winding_transformers
-        @test transformers.i == [42, 4774]             #  1st entry of 1st row
-        @test transformers.fi == [1.0, 1.0]            # last entry of 1st row
-        @test transformers.r1_2 == [0.0025, 0.0]       #  1st entry of 2nd row
-        @test transformers.sbase1_2 == [100.0, 100.0]  # last entry of 2nd row
-        @test transformers.windv1 == [1.0, 1.0462]     #  1st entry of 3rd row
-        @test transformers.cx1 == [0.0, 0.0]           # last entry of 3rd row
-        @test transformers.windv2 == [1.0, 1.045]      #  1st entry of 4th row
-        @test transformers.nomv2 == [138.0, 240.35]    # last entry of 4th row
-        @test transformers.ckt == ["K1", "90"]         # string col
+        @test length(transformers.i) == 3
+        @test transformers.i == [42, 4774, 222222]            #  1st entry of 1st row
+        @test transformers.fi == [1.0, 1.0, 1.0]              # last entry of 1st row
+        @test transformers.r1_2 == [0.0025, 0.0, 0.0005]      #  1st entry of 2nd row
+        @test transformers.sbase1_2 == [100.0, 100.0, 100.0]  # last entry of 2nd row
+        @test transformers.windv1 == [1.0, 1.0462, 1.0]       #  1st entry of 3rd row
+        @test transformers.cx1 == [0.0, 0.0, 0.0]             # last entry of 3rd row
+        # Important to test a row where the 1st character is '0', to get it does not
+        # get misinterpreted as the start of a "0 bus" records terminating the section.
+        @test transformers.windv2 == [1.0, 1.045, 0.98250]    #  1st entry of 4th row
+        @test transformers.nomv2 == [138.0, 240.35, 345.0]    # last entry of 4th row
+        @test transformers.ckt == ["K1", "90", "B1"]          # string col
     end
 end

test/testfiles/synthetic_data_v29.raw

@@ -21,6 +21,10 @@
    0.00000,   0.19100,   100.00
 1.04620,  13.600,   0.000,     0.00,     0.00,     0.00, 0,      0, 1.04620, 1.04620, 0.00000, 0.00000,   2, 0, 0.00000, 0.00000
 1.04500, 240.350
+222222,    11,     0,'B1',1,1,1,   0.00000,   0.00000,2,'    BK1     ',1,   2,1.0000
+   0.00050,   0.03131,   100.00
+1.00000, 123.000,   0.000,   432.00,   567.00,   567.00, 0,      0, 1.00000, 1.00000, 0.00000, 0.00000,   2, 0, 0.00000, 0.00000
+0.98250, 345.000
 0 / END OF TRANSFORMER DATA, BEGIN AREA DATA
 0 / END OF AREA DATA, BEGIN TWO-TERMINAL DC DATA
 0 / END OF TWO-TERMINAL DC DATA, BEGIN VSC DC LINE DATA