HEX = '0123456789ABCDEF'
def needsquoting(c, quotetabs):
- """Decide whether a particular character needs to be quoted.
+ """Decide whether a particular character needs to be quoted.
- The 'quotetabs' flag indicates whether tabs should be quoted."""
- if c == '\t':
- return not quotetabs
- return c == ESCAPE or not(' ' <= c <= '~')
+ The 'quotetabs' flag indicates whether tabs should be quoted."""
+ if c == '\t':
+ return not quotetabs
+ return c == ESCAPE or not(' ' <= c <= '~')
def quote(c):
- """Quote a single character."""
- if c == ESCAPE:
- return ESCAPE * 2
- else:
- i = ord(c)
- return ESCAPE + HEX[i/16] + HEX[i%16]
+ """Quote a single character."""
+ i = ord(c)
+ return ESCAPE + HEX[i/16] + HEX[i%16]
def encode(input, output, quotetabs):
- """Read 'input', apply quoted-printable encoding, and write to 'output'.
+ """Read 'input', apply quoted-printable encoding, and write to 'output'.
- 'input' and 'output' are files with readline() and write() methods.
- The 'quotetabs' flag indicates whether tabs should be quoted."""
- while 1:
- line = input.readline()
- if not line: break
- new = ''
- last = line[-1:]
- if last == '\n': line = line[:-1]
- else: last = ''
- prev = ''
- for c in line:
- if needsquoting(c, quotetabs):
- c = quote(c)
- if len(new) + len(c) >= MAXLINESIZE:
- output.write(new + ESCAPE + '\n')
- new = ''
- new = new + c
- prev = c
- if prev in (' ', '\t'):
- output.write(new + ESCAPE + '\n\n')
- else:
- output.write(new + '\n')
+ 'input' and 'output' are files with readline() and write() methods.
+ The 'quotetabs' flag indicates whether tabs should be quoted.
+ """
+ while 1:
+ line = input.readline()
+ if not line:
+ break
+ new = ''
+ last = line[-1:]
+ if last == '\n':
+ line = line[:-1]
+ else:
+ last = ''
+ prev = ''
+ for c in line:
+ if needsquoting(c, quotetabs):
+ c = quote(c)
+ if len(new) + len(c) >= MAXLINESIZE:
+ output.write(new + ESCAPE + '\n')
+ new = ''
+ new = new + c
+ prev = c
+ if prev in (' ', '\t'):
+ output.write(new + ESCAPE + '\n\n')
+ else:
+ output.write(new + '\n')
def decode(input, output):
- """Read 'input', apply quoted-printable decoding, and write to 'output'.
+ """Read 'input', apply quoted-printable decoding, and write to 'output'.
- 'input' and 'output' are files with readline() and write() methods."""
- new = ''
- while 1:
- line = input.readline()
- if not line: break
- i, n = 0, len(line)
- if n > 0 and line[n-1] == '\n':
- partial = 0; n = n-1
- # Strip trailing whitespace
- while n > 0 and line[n-1] in (' ', '\t'):
- n = n-1
- else:
- partial = 1
- while i < n:
- c = line[i]
- if c <> ESCAPE:
- new = new + c; i = i+1
- elif i+1 == n and not partial:
- partial = 1; break
- elif i+1 < n and line[i+1] == ESCAPE:
- new = new + ESCAPE; i = i+2
- elif i+2 < n and ishex(line[i+1]) and ishex(line[i+2]):
- new = new + chr(unhex(line[i+1:i+3])); i = i+3
- else: # Bad escape sequence -- leave it in
- new = new + c; i = i+1
- if not partial:
- output.write(new + '\n')
- new = ''
- if new:
- output.write(new)
+ 'input' and 'output' are files with readline() and write() methods."""
+ new = ''
+ while 1:
+ line = input.readline()
+ if not line: break
+ i, n = 0, len(line)
+ if n > 0 and line[n-1] == '\n':
+ partial = 0; n = n-1
+ # Strip trailing whitespace
+ while n > 0 and line[n-1] in (' ', '\t'):
+ n = n-1
+ else:
+ partial = 1
+ while i < n:
+ c = line[i]
+ if c <> ESCAPE:
+ new = new + c; i = i+1
+ elif i+1 == n and not partial:
+ partial = 1; break
+ elif i+1 < n and line[i+1] == ESCAPE:
+ new = new + ESCAPE; i = i+2
+ elif i+2 < n and ishex(line[i+1]) and ishex(line[i+2]):
+ new = new + chr(unhex(line[i+1:i+3])); i = i+3
+ else: # Bad escape sequence -- leave it in
+ new = new + c; i = i+1
+ if not partial:
+ output.write(new + '\n')
+ new = ''
+ if new:
+ output.write(new)
def ishex(c):
- """Return true if the character 'c' is a hexadecimal digit."""
- return '0' <= c <= '9' or 'a' <= c <= 'f' or 'A' <= c <= 'F'
+ """Return true if the character 'c' is a hexadecimal digit."""
+ return '0' <= c <= '9' or 'a' <= c <= 'f' or 'A' <= c <= 'F'
def unhex(s):
- """Get the integer value of a hexadecimal number."""
- bits = 0
- for c in s:
- if '0' <= c <= '9':
- i = ord('0')
- elif 'a' <= c <= 'f':
- i = ord('a')-10
- elif 'A' <= c <= 'F':
- i = ord('A')-10
- else:
- break
- bits = bits*16 + (ord(c) - i)
- return bits
+ """Get the integer value of a hexadecimal number."""
+ bits = 0
+ for c in s:
+ if '0' <= c <= '9':
+ i = ord('0')
+ elif 'a' <= c <= 'f':
+ i = ord('a')-10
+ elif 'A' <= c <= 'F':
+ i = ord('A')-10
+ else:
+ break
+ bits = bits*16 + (ord(c) - i)
+ return bits
def test():
- import sys
- import getopt
- try:
- opts, args = getopt.getopt(sys.argv[1:], 'td')
- except getopt.error, msg:
- sys.stdout = sys.stderr
- print msg
- print "usage: quopri [-t | -d] [file] ..."
- print "-t: quote tabs"
- print "-d: decode; default encode"
- sys.exit(2)
- deco = 0
- tabs = 0
- for o, a in opts:
- if o == '-t': tabs = 1
- if o == '-d': deco = 1
- if tabs and deco:
- sys.stdout = sys.stderr
- print "-t and -d are mutually exclusive"
- sys.exit(2)
- if not args: args = ['-']
- sts = 0
- for file in args:
- if file == '-':
- fp = sys.stdin
- else:
- try:
- fp = open(file)
- except IOError, msg:
- sys.stderr.write("%s: can't open (%s)\n" % (file, msg))
- sts = 1
- continue
- if deco:
- decode(fp, sys.stdout)
- else:
- encode(fp, sys.stdout, tabs)
- if fp is not sys.stdin:
- fp.close()
- if sts:
- sys.exit(sts)
+ import sys
+ import getopt
+ try:
+ opts, args = getopt.getopt(sys.argv[1:], 'td')
+ except getopt.error, msg:
+ sys.stdout = sys.stderr
+ print msg
+ print "usage: quopri [-t | -d] [file] ..."
+ print "-t: quote tabs"
+ print "-d: decode; default encode"
+ sys.exit(2)
+ deco = 0
+ tabs = 0
+ for o, a in opts:
+ if o == '-t': tabs = 1
+ if o == '-d': deco = 1
+ if tabs and deco:
+ sys.stdout = sys.stderr
+ print "-t and -d are mutually exclusive"
+ sys.exit(2)
+ if not args: args = ['-']
+ sts = 0
+ for file in args:
+ if file == '-':
+ fp = sys.stdin
+ else:
+ try:
+ fp = open(file)
+ except IOError, msg:
+ sys.stderr.write("%s: can't open (%s)\n" % (file, msg))
+ sts = 1
+ continue
+ if deco:
+ decode(fp, sys.stdout)
+ else:
+ encode(fp, sys.stdout, tabs)
+ if fp is not sys.stdin:
+ fp.close()
+ if sts:
+ sys.exit(sts)
if __name__ == '__main__':
- test()
+ test()
projects / python / commitdiff