move code around to avoid dependency loops

original-commit-id: ca07f1d64c0235b49160fc501553a70af8331d81

3 files changed, 183 insertions, 168 deletions

diff --git a/crystal.py b/crystal.py
index 6f6ba09..22bd6ec 100644
--- a/crystal.py
+++ b/crystal.py
@@ -310,16 +310,7 @@ def calculate_bank(address):
         raise Exception, "bank 1 does not exist"
     return int(address) / 0x4000
 
-def calculate_pointer(short_pointer, bank=None):
-    """calculates the full address given a 4-byte pointer and bank byte"""
-    short_pointer = int(short_pointer)
-    if 0x4000 <= short_pointer <= 0x7fff:
-        short_pointer -= 0x4000
-        bank = int(bank)
-    else:
-        bank = 0
-    pointer = short_pointer + (bank * 0x4000)
-    return pointer
+from pointers import calculate_pointer
 
 def calculate_pointer_from_bytes_at(address, bank=False):
     """calculates a pointer from 2 bytes at a location
@@ -7633,19 +7624,6 @@ def get_label_for(address):
     else:
         return "$%.2x"%(address)
 
-def remove_quoted_text(line):
-    """get rid of content inside quotes
-    and also removes the quotes from the input string"""
-    while line.count("\"") % 2 == 0 and line.count("\"") > 0:
-        first = line.find("\"")
-        second = line.find("\"", first+1)
-        line = line[0:first] + line[second+1:]
-    while line.count("\'") % 2 == 0 and line.count("'") > 0:
-        first = line.find("\'")
-        second = line.find("\'", first+1)
-        line = line[0:first] + line[second+1:]
-    return line
-
 # all_new_labels is a temporary replacement for all_labels,
 # at least until the two approaches are merged in the code base.
 all_new_labels = []
@@ -7759,151 +7737,9 @@ class Label:
         name = object.make_label()
         return name
 
-def line_has_comment_address(line, returnable={}, bank=None):
-    """checks that a given line has a comment
-    with a valid address, and returns the address in the object.
-    Note: bank is required if you have a 4-letter-or-less address,
-    because otherwise there is no way to figure out which bank
-    is curretly being scanned."""
-    #first set the bank/offset to nada
-    returnable["bank"] = None
-    returnable["offset"] = None
-    returnable["address"] = None
-    #only valid characters are 0-9A-F
-    valid = [str(x) for x in range(0,10)] + [chr(x) for x in range(97, 102+1)]
-    #check if there is a comment in this line
-    if ";" not in line:
-        return False
-    #first throw away anything in quotes
-    if (line.count("\"") % 2 == 0 and line.count("\"")!=0) \
-       or (line.count("\'") % 2 == 0 and line.count("\'")!=0):
-        line = remove_quoted_text(line)
-    #check if there is still a comment in this line after quotes removed
-    if ";" not in line:
-        return False
-    #but even if there's a semicolon there must be later text
-    if line[-1] == ";":
-        return False
-    #and just a space doesn't count
-    if line[-2:] == "; ":
-        return False
-    #and multiple whitespace doesn't count either
-    line = line.rstrip(" ").lstrip(" ")
-    if line[-1] == ";":
-        return False
-    #there must be more content after the semicolon
-    if len(line)-1 == line.find(";"):
-        return False
-    #split it up into the main comment part
-    comment = line[line.find(";")+1:]
-    #don't want no leading whitespace
-    comment = comment.lstrip(" ").rstrip(" ")
-    #split up multi-token comments into single tokens
-    token = comment
-    if " " in comment:
-        #use the first token in the comment
-        token = comment.split(" ")[0]
-    if token in ["0x", "$", "x", ":"]:
-        return False
-    offset = None
-    #process a token with a A:B format
-    if ":" in token: #3:3F0A, $3:$3F0A, 0x3:0x3F0A, 3:3F0A
-        #split up the token
-        bank_piece = token.split(":")[0].lower()
-        offset_piece = token.split(":")[1].lower()
-        #filter out blanks/duds
-        if bank_piece in ["$", "0x", "x"] \
-        or offset_piece in ["$", "0x", "x"]:
-            return False
-        #they can't have both "$" and "x"
-        if "$" in bank_piece and "x" in bank_piece:
-            return False
-        if "$" in offset_piece and "x" in offset_piece:
-            return False
-        #process the bank piece
-        if "$" in bank_piece:
-            bank_piece = bank_piece.replace("$", "0x")
-        #check characters for validity?
-        for c in bank_piece.replace("x", ""):
-            if c not in valid:
-                return False
-        bank = int(bank_piece, 16)
-        #process the offset piece
-        if "$" in offset_piece:
-            offset_piece = offset_piece.replace("$", "0x")
-        #check characters for validity?
-        for c in offset_piece.replace("x", ""):
-            if c not in valid:
-                return False
-        if len(offset_piece) == 0:
-            return None
-        offset = int(offset_piece, 16)
-    #filter out blanks/duds
-    elif token in ["$", "0x", "x"]:
-        return False
-    #can't have both "$" and "x" in the number
-    elif "$" in token and "x" in token:
-        return False
-    elif "x" in token and not "0x" in token: #it should be 0x
-        return False
-    elif "$" in token and not "x" in token:
-        token = token.replace("$", "0x")
-        offset = int(token, 16)
-    elif "0x" in token and not "$" in token:
-        offset = int(token, 16)
-    else: #might just be "1" at this point
-        token = token.lower()
-        #check if there are bad characters
-        for c in token:
-            if c not in valid:
-                return False
-        offset = int(token, 16)
-    if offset == None and bank == None:
-        return False
-    if bank == None:
-        bank = calculate_bank(offset)
-    returnable["bank"] = bank
-    returnable["offset"] = offset
-    returnable["address"] = calculate_pointer(offset, bank=bank)
-    return True
-
-def line_has_label(line):
-    """returns True if the line has an asm label"""
-    if not isinstance(line, str):
-        raise Exception, "can't check this type of object"
-    line = line.rstrip(" ").lstrip(" ")
-    line = remove_quoted_text(line)
-    if ";" in line:
-        line = line.split(";")[0]
-    if 0 <= len(line) <= 1:
-        return False
-    if ":" not in line:
-        return False
-    if line[0] == ";":
-        return False
-    if line[0] == "\"":
-        return False
-    if "::" in line:
-        return False
-    return True
-
-def get_address_from_line_comment(line, bank=None):
-    """ wrapper for line_has_comment_address
-    """
-    returnable = {}
-    result = line_has_comment_address(line, returnable=returnable, bank=bank)
-    if not result:
-        return False
-    return returnable["address"]
-
-def get_label_from_line(line):
-    """returns the label from the line"""
-    #check if the line has a label
-    if not line_has_label(line):
-        return None
-    #split up the line
-    label = line.split(":")[0]
-    return label
+from labels import remove_quoted_text, line_has_comment_address, \
+                   line_has_label, get_label_from_line, \
+                   get_address_from_line_comment
 
 def old_is_label_in_asm(label):
     """ Returns the line number or returns None if the
diff --git a/labels.py b/labels.py
new file mode 100644
index 0000000..193ca24
--- /dev/null
+++ b/labels.py
@@ -0,0 +1,164 @@
+""" Various label/line-related functions.
+"""
+
+from pointers import calculate_pointer
+
+def remove_quoted_text(line):
+    """get rid of content inside quotes
+    and also removes the quotes from the input string"""
+    while line.count("\"") % 2 == 0 and line.count("\"") > 0: 
+        first = line.find("\"")
+        second = line.find("\"", first+1)
+        line = line[0:first] + line[second+1:]
+    while line.count("\'") % 2 == 0 and line.count("'") > 0: 
+        first = line.find("\'")
+        second = line.find("\'", first+1)
+        line = line[0:first] + line[second+1:]
+    return line
+
+def line_has_comment_address(line, returnable={}, bank=None):
+    """checks that a given line has a comment
+    with a valid address, and returns the address in the object.
+    Note: bank is required if you have a 4-letter-or-less address,
+    because otherwise there is no way to figure out which bank
+    is curretly being scanned."""
+    #first set the bank/offset to nada
+    returnable["bank"] = None
+    returnable["offset"] = None
+    returnable["address"] = None
+    #only valid characters are 0-9A-F
+    valid = [str(x) for x in range(0,10)] + [chr(x) for x in range(97, 102+1)]
+    #check if there is a comment in this line
+    if ";" not in line:
+        return False
+    #first throw away anything in quotes
+    if (line.count("\"") % 2 == 0 and line.count("\"")!=0) \
+       or (line.count("\'") % 2 == 0 and line.count("\'")!=0):
+        line = remove_quoted_text(line)
+    #check if there is still a comment in this line after quotes removed
+    if ";" not in line:
+        return False
+    #but even if there's a semicolon there must be later text
+    if line[-1] == ";":
+        return False
+    #and just a space doesn't count
+    if line[-2:] == "; ":
+        return False
+    #and multiple whitespace doesn't count either
+    line = line.rstrip(" ").lstrip(" ")
+    if line[-1] == ";":
+        return False
+    #there must be more content after the semicolon
+    if len(line)-1 == line.find(";"):
+        return False
+    #split it up into the main comment part
+    comment = line[line.find(";")+1:]
+    #don't want no leading whitespace
+    comment = comment.lstrip(" ").rstrip(" ")
+    #split up multi-token comments into single tokens
+    token = comment
+    if " " in comment:
+        #use the first token in the comment
+        token = comment.split(" ")[0]
+    if token in ["0x", "$", "x", ":"]:
+        return False
+    offset = None
+    #process a token with a A:B format
+    if ":" in token: #3:3F0A, $3:$3F0A, 0x3:0x3F0A, 3:3F0A
+        #split up the token
+        bank_piece = token.split(":")[0].lower()
+        offset_piece = token.split(":")[1].lower()
+        #filter out blanks/duds
+        if bank_piece in ["$", "0x", "x"] \
+        or offset_piece in ["$", "0x", "x"]:
+            return False
+        #they can't have both "$" and "x"
+        if "$" in bank_piece and "x" in bank_piece:
+            return False
+        if "$" in offset_piece and "x" in offset_piece:
+            return False
+        #process the bank piece
+        if "$" in bank_piece:
+            bank_piece = bank_piece.replace("$", "0x")
+        #check characters for validity?
+        for c in bank_piece.replace("x", ""):
+            if c not in valid:
+                return False
+        bank = int(bank_piece, 16)
+        #process the offset piece
+        if "$" in offset_piece:
+            offset_piece = offset_piece.replace("$", "0x")
+        #check characters for validity?
+        for c in offset_piece.replace("x", ""):
+            if c not in valid:
+                return False
+        if len(offset_piece) == 0:
+            return None
+        offset = int(offset_piece, 16)
+    #filter out blanks/duds
+    elif token in ["$", "0x", "x"]:
+        return False
+    #can't have both "$" and "x" in the number
+    elif "$" in token and "x" in token:
+        return False
+    elif "x" in token and not "0x" in token: #it should be 0x
+        return False
+    elif "$" in token and not "x" in token:
+        token = token.replace("$", "0x")
+        offset = int(token, 16)
+    elif "0x" in token and not "$" in token:
+        offset = int(token, 16)
+    else: #might just be "1" at this point
+        token = token.lower()
+        #check if there are bad characters
+        for c in token:
+            if c not in valid:
+                return False
+        offset = int(token, 16)
+    if offset == None and bank == None:
+        return False
+    if bank == None:
+        bank = calculate_bank(offset)
+    returnable["bank"] = bank
+    returnable["offset"] = offset
+    returnable["address"] = calculate_pointer(offset, bank=bank)
+    return True
+
+def get_address_from_line_comment(line, bank=None):
+    """ wrapper for line_has_comment_address
+    """
+    returnable = {}
+    result = line_has_comment_address(line, returnable=returnable, bank=bank)
+    if not result:
+        return False
+    return returnable["address"]
+
+def line_has_label(line):
+    """returns True if the line has an asm label"""
+    if not isinstance(line, str):
+        raise Exception, "can't check this type of object"
+    line = line.rstrip(" ").lstrip(" ")
+    line = remove_quoted_text(line)
+    if ";" in line:
+        line = line.split(";")[0]
+    if 0 <= len(line) <= 1:
+        return False
+    if ":" not in line:
+        return False
+    if line[0] == ";": 
+        return False
+    if line[0] == "\"":
+        return False
+    if "::" in line:
+        return False
+    return True
+
+def get_label_from_line(line):
+    """returns the label from the line"""
+    #check if the line has a label
+    if not line_has_label(line):
+        return None
+    #split up the line
+    label = line.split(":")[0]
+    return label
+
diff --git a/pointers.py b/pointers.py
new file mode 100644
index 0000000..d7b3cb8
--- /dev/null
+++ b/pointers.py
@@ -0,0 +1,15 @@
+""" Various functions related to pointer and address math. Mostly to avoid
+    depedency loops.
+"""
+
+def calculate_pointer(short_pointer, bank=None):
+    """calculates the full address given a 4-byte pointer and bank byte"""
+    short_pointer = int(short_pointer)
+    if 0x4000 <= short_pointer <= 0x7fff:
+        short_pointer -= 0x4000
+        bank = int(bank)
+    else:
+        bank = 0
+    pointer = short_pointer + (bank * 0x4000)
+    return pointer
+