up follow livre

venv/lib/python3.13/site-packages/fontTools/voltLib/lexer.py

@@ -0,0 +1,99 @@
+from fontTools.voltLib.error import VoltLibError
+
+
+class Lexer(object):
+    NUMBER = "NUMBER"
+    STRING = "STRING"
+    NAME = "NAME"
+    NEWLINE = "NEWLINE"
+
+    CHAR_WHITESPACE_ = " \t"
+    CHAR_NEWLINE_ = "\r\n"
+    CHAR_DIGIT_ = "0123456789"
+    CHAR_UC_LETTER_ = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    CHAR_LC_LETTER_ = "abcdefghijklmnopqrstuvwxyz"
+    CHAR_UNDERSCORE_ = "_"
+    CHAR_PERIOD_ = "."
+    CHAR_NAME_START_ = (
+        CHAR_UC_LETTER_ + CHAR_LC_LETTER_ + CHAR_PERIOD_ + CHAR_UNDERSCORE_
+    )
+    CHAR_NAME_CONTINUATION_ = CHAR_NAME_START_ + CHAR_DIGIT_
+
+    def __init__(self, text, filename):
+        self.filename_ = filename
+        self.line_ = 1
+        self.pos_ = 0
+        self.line_start_ = 0
+        self.text_ = text
+        self.text_length_ = len(text)
+
+    def __iter__(self):
+        return self
+
+    def next(self):  # Python 2
+        return self.__next__()
+
+    def __next__(self):  # Python 3
+        while True:
+            token_type, token, location = self.next_()
+            if token_type not in {Lexer.NEWLINE}:
+                return (token_type, token, location)
+
+    def location_(self):
+        column = self.pos_ - self.line_start_ + 1
+        return (self.filename_ or "<volt>", self.line_, column)
+
+    def next_(self):
+        self.scan_over_(Lexer.CHAR_WHITESPACE_)
+        location = self.location_()
+        start = self.pos_
+        text = self.text_
+        limit = len(text)
+        if start >= limit:
+            raise StopIteration()
+        cur_char = text[start]
+        next_char = text[start + 1] if start + 1 < limit else None
+
+        if cur_char == "\n":
+            self.pos_ += 1
+            self.line_ += 1
+            self.line_start_ = self.pos_
+            return (Lexer.NEWLINE, None, location)
+        if cur_char == "\r":
+            self.pos_ += 2 if next_char == "\n" else 1
+            self.line_ += 1
+            self.line_start_ = self.pos_
+            return (Lexer.NEWLINE, None, location)
+        if cur_char == '"':
+            self.pos_ += 1
+            self.scan_until_('"\r\n')
+            if self.pos_ < self.text_length_ and self.text_[self.pos_] == '"':
+                self.pos_ += 1
+                return (Lexer.STRING, text[start + 1 : self.pos_ - 1], location)
+            else:
+                raise VoltLibError("Expected '\"' to terminate string", location)
+        if cur_char in Lexer.CHAR_NAME_START_:
+            self.pos_ += 1
+            self.scan_over_(Lexer.CHAR_NAME_CONTINUATION_)
+            token = text[start : self.pos_]
+            return (Lexer.NAME, token, location)
+        if cur_char in Lexer.CHAR_DIGIT_:
+            self.scan_over_(Lexer.CHAR_DIGIT_)
+            return (Lexer.NUMBER, int(text[start : self.pos_], 10), location)
+        if cur_char == "-" and next_char in Lexer.CHAR_DIGIT_:
+            self.pos_ += 1
+            self.scan_over_(Lexer.CHAR_DIGIT_)
+            return (Lexer.NUMBER, int(text[start : self.pos_], 10), location)
+        raise VoltLibError("Unexpected character: '%s'" % cur_char, location)
+
+    def scan_over_(self, valid):
+        p = self.pos_
+        while p < self.text_length_ and self.text_[p] in valid:
+            p += 1
+        self.pos_ = p
+
+    def scan_until_(self, stop_at):
+        p = self.pos_
+        while p < self.text_length_ and self.text_[p] not in stop_at:
+            p += 1
+        self.pos_ = p