Fix offset error in StdIn buffering

tilgovi · web-flow · commit b080ea44dc03 · 2016-08-05T15:30:02.000-07:00
When the stdin handler returns a string with a newline character,
the `GhostscriptStdIO` class incorrectly removes the number of
bytes requested from ghostscript rather than the number of bytes
processed before the early return.

Instead of removing `count` characters from the buffer string, remove
only `position` characters.
diff --git a/Ghostscript.NET/GhostscriptStdIO.cs b/Ghostscript.NET/GhostscriptStdIO.cs
@@ -144,7 +144,7 @@ private int gs_std_in(IntPtr handle, IntPtr pointer, int count)
             }
 
             // remove written data out from the cached input
-            _input = _input.Remove(0, count);
+            _input = _input.Remove(0, position);
 
             // return number of bytes written
             return position;

Original file line number	Diff line number	Diff line change
`@@ -144,7 +144,7 @@ private int gs_std_in(IntPtr handle, IntPtr pointer, int count)`
`144`	`144`	`}`
`145`	`145`
`146`	`146`	`// remove written data out from the cached input`
`147`		`- _input = _input.Remove(0, count);`
	`147`	`+ _input = _input.Remove(0, position);`
`148`	`148`
`149`	`149`	`// return number of bytes written`
`150`	`150`	`return position;`