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authorTrygve Laugstøl <trygvis@inamo.no>2017-12-07 12:12:59 +0100
committerTrygve Laugstøl <trygvis@inamo.no>2017-12-07 12:13:50 +0100
commit1fba999bec5a589e4785594fb1a6fbfab9129097 (patch)
tree1ff18f14284f89fa8bee1bd123802c4f40fec4be /src/ee/kicad
parentaa7e1cac11f04f997317c5263b00d1e7d0b94608 (diff)
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o A start of a kicad_pcb parser.
Diffstat (limited to 'src/ee/kicad')
-rw-r--r--src/ee/kicad/__init__.py8
-rw-r--r--src/ee/kicad/_parse_kicad_pcb.py146
2 files changed, 151 insertions, 3 deletions
diff --git a/src/ee/kicad/__init__.py b/src/ee/kicad/__init__.py
index d949fbe..efc20a2 100644
--- a/src/ee/kicad/__init__.py
+++ b/src/ee/kicad/__init__.py
@@ -4,14 +4,16 @@ from ee import EeException
from ee.kicad.read_schematic import read_schematic, read_schematics
from ee.kicad.to_bom import to_bom, to_bom_xml
from .model import *
+from ._parse_kicad_pcb import parse_kicad_pcb
__all__ = [
- "Position",
- "ComponentField",
"Component",
- "Schematic",
+ "ComponentField",
+ "parse_kicad_pcb",
+ "Position",
"read_schematic",
"read_schematics",
+ "Schematic",
"to_bom",
"to_bom_xml",
"to_pandas",
diff --git a/src/ee/kicad/_parse_kicad_pcb.py b/src/ee/kicad/_parse_kicad_pcb.py
new file mode 100644
index 0000000..5ea4d1b
--- /dev/null
+++ b/src/ee/kicad/_parse_kicad_pcb.py
@@ -0,0 +1,146 @@
+EVENT_START = 1
+EVENT_END = 2
+EVENT_LPAREN = 3
+EVENT_RPAREN = 4
+EVENT_TEXT = 5
+
+def state_to_str(s):
+ if s == EVENT_START:
+ return "EVENT_START"
+ if s == EVENT_END:
+ return "EVENT_END"
+ if s == EVENT_LPAREN:
+ return "EVENT_LPAREN"
+ if s == EVENT_RPAREN:
+ return "EVENT_RPAREN"
+ if s == EVENT_TEXT:
+ return "EVENT_TEXT"
+ return "UNKNOWN STATE"
+
+def parse_kicad_pcb(path):
+ class state(object):
+ def __init__(self):
+ self.f = open(path, "r")#, 128 * 1024)
+ self.state = EVENT_START
+ self.buffer = []
+
+ def text(self):
+ return self._text
+
+ def close(self):
+ if self.f:
+ f = self.f
+ self.f = None
+ f.close()
+
+ def _read_c(self):
+ # TODO: count lines and characters
+ if self.buffer:
+ c = self.buffer[0]
+ while c == '\n':
+ del self.buffer[0]
+ c = self.buffer[0]
+ return c
+
+ c = self.f.read(1024)
+ if not c:
+ return c
+
+ self.buffer.extend(c)
+ return self._read_c()
+
+# if self.buffer:
+# c = self.buffer[0]
+# del self.buffer[0]
+# return c
+#
+# c = self.f.read(1)
+# while c and c == '\n':
+# c = self.f.read(1)
+# return c
+
+ def _unread(self, s):
+ for c in s:
+ self.buffer.append(c)
+# print("unreading: '{}', buffer={}".format(s, str(self.buffer)))
+
+ def _read_token(self):
+ s = ""
+ while True:
+ c = self._read_c()
+
+ if not c:
+ return s if s else None
+
+ if c == " ":
+ # Ignore leading blanks
+ if not s:
+ continue
+
+ if c == "(" or c == ")":
+ if not s:
+ return c
+ self._unread(c)
+ return s.rstrip()
+
+ if c == " ":
+ return s
+
+ if c == "\"":
+ while c:
+ c = self._read_c()
+
+ if c == "\"":
+ break
+
+ s += c
+ return s
+ s += c
+
+ return s.rstrip()
+
+ def next(self):
+ s = self.state
+# print("next: current state={}, buffer={}".format(self.state_to_str(s), self.buffer))
+ self._text = None
+ if s == EVENT_END:
+ raise Exception("Invalid state, state=END")
+
+ token = self._read_token()
+# print("token={}".format(token))
+
+ if token is None:
+ self.state = EVENT_END
+ self.close()
+ return (EVENT_END, None)
+
+ if token == "(":
+ self.state = EVENT_LPAREN
+ return (EVENT_LPAREN, None)
+ if token == ")":
+ self.state = EVENT_RPAREN
+ return (EVENT_RPAREN, None)
+
+ self._text = token
+ self.state = EVENT_TEXT
+ return (EVENT_TEXT, token)
+
+ s = state()
+ (event, token) = s.next()
+ while event != EVENT_END:
+ yield (event, token)
+ (event, token) = s.next()
+
+#indent = 0
+#for (event_type, text) in parse_kicad_pcb("alpha.kicad_pcb"):
+# if event_type == EVENT_LPAREN:
+# prefix = " " * indent
+# indent = indent + 1
+# print(prefix + "(")
+# elif event_type == EVENT_RPAREN:
+# indent = indent - 1
+# prefix = " " * indent
+# print(prefix + ")")
+# elif event_type == EVENT_TEXT:
+# prefix = " " * indent
+# print("{}{}".format(prefix, text))