Get rid of freeze (now its own directory).

Added some new demos.  Fixed a few others.

Demo/scripts/README

@@ -21,7 +21,6 @@ findlinksto.py		Recursively find symbolic links to a given path prefix
 fixps.py		Fix Python scripts' first line (if #!)
 fixcid.py		Massive identifier substitution on C source files
 fixheader.py		Add some cpp magic to a C include file
-freeze.py		Convert a Python script into a free-standing binary
 from.py			Summarize mailbox
 ftpstats.py		Summarize ftp daemon log file
 ifdef.py		Remove #if(n)def groups from C sources
@@ -31,6 +30,7 @@ lpwatch.py		Watch BSD line printer queues
 markov.py		Markov chain simulation of words or characters
 mboxconvvert.py		Convert MH or MMDF mailboxes to unix mailbox format
 methfix.py		Fix old method syntax def f(self, (a1, ..., aN)):
+morse.py		Produce morse code (audible or on AIFF file)
 mkreal.py		Turn a symbolic link into a real file or directory
 mpzpi.py		test mpz -- print digits of pi (compare pi.py)
 objgraph.py		Print object graph from nm output on a library
@@ -41,7 +41,9 @@ pindent.py		Indent Python code, giving block-closing comments
 pp.py			Emulate some Perl command line options
 primes.py		Print prime numbers
 ptags.py		Create vi tags file for Python modules
+script.py		Equivalent to BSD script(1) -- by Steen Lumholt
 suff.py			Sort a list of files by suffix
+sum5.py			Print md5 checksums of files
 unbirthday.py		Print unbirthday count
 which.py		Find a program in $PATH
 xxci.py			Wrapper for rcsdiff and ci

Demo/scripts/morse.py

@@ -0,0 +1,149 @@
+# DAH should be three DOTs.
+# Space between DOTs and DAHs should be one DOT.
+# Space between two letters should be one DAH.
+# Space between two words should be DOT DAH DAH.
+
+import sys, math, audiodev
+
+DOT = 30
+DAH = 3 * DOT
+OCTAVE = 2				# 1 == 441 Hz, 2 == 882 Hz, ...
+
+morsetab = {
+	'A': '.-',		'a': '.-',
+	'B': '-...',		'b': '-...',
+	'C': '-.-.',		'c': '-.-.',
+	'D': '-..',		'd': '-..',
+	'E': '.',		'e': '.',
+	'F': '..-.',		'f': '..-.',
+	'G': '--.',		'g': '--.',
+	'H': '....',		'h': '....',
+	'I': '..',		'i': '..',
+	'J': '.---',		'j': '.---',
+	'K': '-.-',		'k': '-.-',
+	'L': '.-..',		'l': '.-..',
+	'M': '--',		'm': '--',
+	'N': '-.',		'n': '-.',
+	'O': '---',		'o': '---',
+	'P': '.--.',		'p': '.--.',
+	'Q': '--.-',		'q': '--.-',
+	'R': '.-.',		'r': '.-.',
+	'S': '...',		's': '...',
+	'T': '-',		't': '-',
+	'U': '..-',		'u': '..-',
+	'V': '...-',		'v': '...-',
+	'W': '.--',		'w': '.--',
+	'X': '-..-',		'x': '-..-',
+	'Y': '-.--',		'y': '-.--',
+	'Z': '--..',		'z': '--..',
+	'0': '-----',
+	'1': '.----',
+	'2': '..---',
+	'3': '...--',
+	'4': '....-',
+	'5': '.....',
+	'6': '-....',
+	'7': '--...',
+	'8': '---..',
+	'9': '----.',
+	',': '--..--',
+	'.': '.-.-.-',
+	'?': '..--..',
+	';': '-.-.-.',
+	':': '---...',
+	"'": '.----.',
+	'-': '-....-',
+	'/': '-..-.',
+	'(': '-.--.-',
+	')': '-.--.-',
+	'_': '..--.-',
+	' ': ' '
+}
+
+# If we play at 44.1 kHz (which we do), then if we produce one sine
+# wave in 100 samples, we get a tone of 441 Hz.  If we produce two
+# sine waves in these 100 samples, we get a tone of 882 Hz.  882 Hz
+# appears to be a nice one for playing morse code.
+def mkwave(octave):
+	global sinewave, nowave
+	sinewave = ''
+	for i in range(100):
+		val = int(math.sin(math.pi * float(i) * octave / 50.0) * 30000)
+		sinewave = sinewave + chr((val >> 8) & 255) + chr(val & 255)
+	nowave = '\0' * 200
+
+mkwave(OCTAVE)
+
+def main():
+	import getopt, string
+	try:
+		opts, args = getopt.getopt(sys.argv[1:], 'o:p:')
+	except getopt.error:
+		sys.stderr.write('Usage ' + sys.argv[0] +
+				 ' [ -o outfile ] [ args ] ...\n')
+		sys.exit(1)
+	dev = None
+	for o, a in opts:
+		if o == '-o':
+			import aifc
+			dev = aifc.open(a, 'w')
+			dev.setframerate(44100)
+			dev.setsampwidth(2)
+			dev.setnchannels(1)
+		if o == '-p':
+			mkwave(string.atoi(a))
+	if not dev:
+		import audiodev
+		dev = audiodev.AudioDev()
+		dev.setoutrate(44100)
+		dev.setsampwidth(2)
+		dev.setnchannels(1)
+		dev.close = dev.stop
+		dev.writeframesraw = dev.writeframes
+	if args:
+		line = string.join(args)
+	else:
+		line = sys.stdin.readline()
+	while line:
+		mline = morse(line)
+		play(mline, dev)
+		if hasattr(dev, 'wait'):
+			dev.wait()
+		if not args:
+			line = sys.stdin.readline()
+		else:
+			line = ''
+	dev.close()
+
+# Convert a string to morse code with \001 between the characters in
+# the string.
+def morse(line):
+	res = ''
+	for c in line:
+		try:
+			res = res + morsetab[c] + '\001'
+		except KeyError:
+			pass
+	return res
+
+# Play a line of morse code.
+def play(line, dev):
+	for c in line:
+		if c == '.':
+			sine(dev, DOT)
+		elif c == '-':
+			sine(dev, DAH)
+		else:			# space
+			pause(dev, DAH + DOT)
+		pause(dev, DOT)
+
+def sine(dev, length):
+	for i in range(length):
+		dev.writeframesraw(sinewave)
+
+def pause(dev, length):
+	for i in range(length):
+		dev.writeframesraw(nowave)
+
+if __name__ == '__main__' or sys.argv[0] == __name__:
+	main()

Demo/scripts/script.py

@@ -0,0 +1,33 @@
+#! /usr/local/bin/python
+# script.py -- Make typescript of terminal session.
+# Usage:
+#	-a	Append to typescript.
+#	-p	Use Python as shell.
+# Author: Steen Lumholt.
+
+
+import os, time, sys
+import pty
+
+def read(fd):
+	data = os.read(fd, 1024)
+	file.write(data)
+	return data
+
+shell = 'sh'
+filename = 'typescript'
+mode = 'w'
+if os.environ.has_key('SHELL'):
+	shell = os.environ['SHELL']
+if '-a' in sys.argv:
+	mode = 'a'
+if '-p' in sys.argv:
+	shell = 'python'
+
+file = open(filename, mode)
+
+sys.stdout.write('Script started, file is %s\n' % filename)
+file.write('Script started on %s\n' % time.ctime(time.time()))
+pty.spawn(shell, read)
+file.write('Script done on %s\n' % time.ctime(time.time()))
+sys.stdout.write('Script done, file is %s\n' % filename)