Adding shlex and netrc by Eric Raymond.

1 files changed, 119 insertions, 0 deletions

diff --git a/Lib/shlex.py b/Lib/shlex.py
new file mode 100644
index 0000000..8b4ac7a
--- /dev/null
+++ b/Lib/shlex.py
@@ -0,0 +1,119 @@
+#!/usr/bin/python
+# Module and documentation by Eric S. Raymond, 21 Dec 1998 
+
+import sys, os, string
+
+class shlex:
+    "A lexical analyzer class for simple shell-like syntaxes." 
+    def __init__(self, instream=None):
+        if instream:
+            self.instream = instream
+        else:
+            self.instream = sys.stdin
+        self.commenters = '#'
+        self.wordchars = 'abcdfeghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'
+        self.whitespace = ' \t\r\n'
+        self.quotes = '\'"'
+        self.state = ' '
+        self.pushback = [];
+        self.lineno = 1
+        self.debug = 0
+        self.token = ''
+
+    def push_token(self, tok):
+        "Push a token onto the stack popped by the get_token method"
+        if (self.debug >= 1):
+            print "Pushing " + tok
+        self.pushback = [tok] + self.pushback;
+
+    def get_token(self):
+        "Get a token from the input stream (or from stack if it's monempty)"
+        if self.pushback:
+            tok = self.pushback[0]
+            self.pushback = self.pushback[1:]
+            if (self.debug >= 1):
+                print "Popping " + tok
+            return tok
+        tok = ''
+        while 1:
+            nextchar = self.instream.read(1);
+            if nextchar == '\n':
+                self.lineno = self.lineno + 1
+            if self.debug >= 3:
+                print "In state " + repr(self.state) + " I see character: " + repr(nextchar) 
+            if self.state == None:
+                return ''
+            elif self.state == ' ':
+                if not nextchar:
+                    self.state = None;	# end of file
+                    break
+                elif nextchar in self.whitespace:
+                    if self.debug >= 2:
+                        print "I see whitespace in whitespace state"
+                    if self.token:
+                        break	# emit current token
+                    else:
+                        continue
+                elif nextchar in self.commenters:
+                    self.instream.readline()
+                    self.lineno = self.lineno + 1
+                elif nextchar in self.wordchars:
+                    self.token = nextchar
+                    self.state = 'a'
+                elif nextchar in self.quotes:
+                    self.token = nextchar
+                    self.state = nextchar
+                else:
+                    self.token = nextchar
+                    if self.token:
+                        break	# emit current token
+                    else:
+                        continue
+            elif self.state in self.quotes:
+                self.token = self.token + nextchar
+                if nextchar == self.state:
+                    self.state = ' '
+                    break
+            elif self.state == 'a':
+                if not nextchar:
+                    self.state = None;	# end of file
+                    break
+                elif nextchar in self.whitespace:
+                    if self.debug >= 2:
+                        print "I see whitespace in word state"
+                    self.state = ' '
+                    if self.token:
+                        break	# emit current token
+                    else:
+                        continue
+                elif nextchar in self.commenters:
+                    self.instream.readline()
+                    self.lineno = self.lineno + 1
+                elif nextchar in self.wordchars or nextchar in self.quotes:
+                    self.token = self.token + nextchar
+                else:
+                    self.pushback = [nextchar] + self.pushback
+                    if self.debug >= 2:
+                        print "I see punctuation in word state"
+                    state = ' '
+                    if self.token:
+                        break	# emit current token
+                    else:
+                        continue
+                
+        result = self.token
+        self.token = ''
+        if self.debug >= 1:
+            print "Token: " + result
+        return result
+
+if __name__ == '__main__': 
+
+    lexer = shlex()
+    while 1:
+        tt = lexer.get_token()
+        if tt != None:
+            print "Token: " + repr(tt)
+        else:
+            break
+