1 files changed, 51 insertions, 0 deletions
diff --git a/pyscv/Frontend/reader.py b/pyscv/Frontend/reader.py
new file mode 100644
index 0000000..a2a280b
--- /dev/null
+++ b/pyscv/Frontend/reader.py
@@ -0,0 +1,51 @@
+# TODO Logging is interesting for debugging purposes, decide what to do with it
+from .logger import newlogger
+logger = newlogger(__name__)
+#import logging
+#logger.setLevel(logging.WARN)
+
+class Reader:
+    def __init__(self, filename):
+        self.filename = filename
+        self._file    = None
+        self.lineno   = 0
+        self.charno   = 0
+        self.char     = None
+
+    def open(self):
+        self._file = open(self.filename, "r")
+        return
+    def close(self):
+        self._file.close()
+        return
+
+    def __enter__(self):
+        self.open()
+        return self
+
+    def __exit__(self, type, value, tb):
+        self.close()
+
+    def advance(self):
+        self.charno += 1
+        if self.char == "\n":
+            self.lineno += 1
+            self.charno = 0
+        self.char = self._file.read(1)
+
+        logger.debug("Read: %s" % self.char.__repr__())
+        return
+
+    def peek(self):
+        pos = self._file.tell()
+        ch = self._file.read(1)
+        self._file.seek(pos)
+        return ch
+
+
+if __name__ == "__main__":
+    with Reader(__file__ ) as src:
+        print(src.peek())
+        while src.peek() != "":
+            src.advance()
+            print(src.char)