Python StringBuilder.build方法代码示例

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
    def here_doc(self):
        ch = self.read()

        indent = ch == "-"
        expand = True
        regexp = False
        if indent:
            ch = self.read()

        if ch in "'\"`":
            term = ch
            if term == "'":
                expand = False
            elif term == "`":
                regexp = True

            marker = StringBuilder()
            while True:
                ch = self.read()
                if ch == self.EOF:
                    self.unread()
                    break
                elif ch == term:
                    break
                else:
                    marker.append(ch)
        else:
            if not (ch.isalnum() or ch == "_"):
                self.unread()
                if indent:
                    self.unread()
                return

            marker = StringBuilder()
            marker.append(ch)
            while True:
                ch = self.read()
                if ch == self.EOF or not (ch.isalnum() or ch == "_"):
                    self.unread()
                    break
                marker.append(ch)

        last_line = StringBuilder()
        while True:
            ch = self.read()
            if ch == "\n":
                break
            elif ch == self.EOF:
                self.unread()
                break
            last_line.append(ch)

        self.str_term = HeredocTerm(self, marker.build(), last_line.build(), indent=indent, expand=expand)
        if regexp:
            yield self.emit("XSTRING_BEG")
        else:
            yield self.emit("STRING_BEG")

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def b2a_base64(space, bin):
    "Base64-code line of data."

    newlength = (len(bin) + 2) // 3
    try:
        newlength = ovfcheck(newlength * 4)
    except OverflowError:
        raise OperationError(space.w_MemoryError, space.w_None)
    newlength += 1
    res = StringBuilder(newlength)

    leftchar = 0
    leftbits = 0
    for c in bin:
        # Shift into our buffer, and output any 6bits ready
        leftchar = (leftchar << 8) | ord(c)
        leftbits += 8
        res.append(table_b2a_base64[(leftchar >> (leftbits-6)) & 0x3f])
        leftbits -= 6
        if leftbits >= 6:
            res.append(table_b2a_base64[(leftchar >> (leftbits-6)) & 0x3f])
            leftbits -= 6
    #
    if leftbits == 2:
        res.append(table_b2a_base64[(leftchar & 3) << 4])
        res.append(PAD)
        res.append(PAD)
    elif leftbits == 4:
        res.append(table_b2a_base64[(leftchar & 0xf) << 2])
        res.append(PAD)
    res.append('\n')
    return space.wrap(res.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def rlecode_hqx(space, data):
    "Binhex RLE-code binary data."

    # that's a guesstimation of the resulting length
    res = StringBuilder(len(data))

    i = 0
    end = len(data)
    while i < end:
        c = data[i]
        res.append(c)
        if c == '\x90':
            # Escape it, and ignore repetitions (*).
            res.append('\x00')
        else:
            # Check how many following are the same
            inend = i + 1
            while inend < end and data[inend] == c and inend < i + 255:
                inend += 1
            if inend - i > 3:
                # More than 3 in a row. Output RLE.  For the case of more
                # than 255, see (*) below.
                res.append('\x90')
                res.append(chr(inend - i))
                i = inend
                continue
        i += 1
    # (*) Note that we put simplicity before compatness here, like CPython.
    # I am sure that if we tried harder to produce the smallest possible
    # string that rledecode_hqx() would expand back to 'data', there are
    # some programs somewhere that would start failing obscurely in rare
    # cases.
    return space.wrap(res.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def repr__Bytearray(space, w_bytearray):
    s = w_bytearray.data

    buf = StringBuilder(50)

    buf.append("bytearray(b'")

    for i in range(len(s)):
        c = s[i]

        if c == '\\' or c == "'":
            buf.append('\\')
            buf.append(c)
        elif c == '\t':
            buf.append('\\t')
        elif c == '\r':
            buf.append('\\r')
        elif c == '\n':
            buf.append('\\n')
        elif not '\x20' <= c < '\x7f':
            n = ord(c)
            buf.append('\\x')
            buf.append("0123456789abcdef"[n>>4])
            buf.append("0123456789abcdef"[n&0xF])
        else:
            buf.append(c)

    buf.append("')")

    return space.wrap(buf.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
    def _read_all(self, space):
        "Read all the file, don't update the cache"
        builder = StringBuilder()
        # First copy what we have in the current buffer
        current_size = self._readahead()
        data = None
        if current_size:
            data = ''.join(self.buffer[self.pos:self.pos + current_size])
            builder.append(data)
        self._reader_reset_buf()
        # We're going past the buffer's bounds, flush it
        if self.writable:
            self._writer_flush_unlocked(space, restore_pos=True)

        while True:
            # Read until EOF or until read() would block
            w_data = space.call_method(self.w_raw, "read")
            if space.is_w(w_data, space.w_None):
                if current_size == 0:
                    return w_data
                break
            data = space.str_w(w_data)
            size = len(data)
            if size == 0:
                break
            builder.append(data)
            current_size += size
            if self.abs_pos != -1:
                self.abs_pos += size
        return space.wrap(builder.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def str_join__String_ANY(space, w_self, w_list):
    list_w = space.listview(w_list)
    if list_w:
        self = w_self._value
        reslen = 0
        for i in range(len(list_w)):
            w_s = list_w[i]
            if not space.is_true(space.isinstance(w_s, space.w_str)):
                if space.is_true(space.isinstance(w_s, space.w_unicode)):
                    # we need to rebuild w_list here, because the original
                    # w_list might be an iterable which we already consumed
                    w_list = space.newlist(list_w)
                    w_u = space.call_function(space.w_unicode, w_self)
                    return space.call_method(w_u, "join", w_list)
                raise operationerrfmt(
                    space.w_TypeError,
                    "sequence item %d: expected string, %s " "found",
                    i,
                    space.type(w_s).getname(space, "?"),
                )
            reslen += len(space.str_w(w_s))
        reslen += len(self) * (len(list_w) - 1)
        sb = StringBuilder(reslen)
        for i in range(len(list_w)):
            if self and i != 0:
                sb.append(self)
            sb.append(space.str_w(list_w[i]))
        return space.wrap(sb.build())
    else:
        return W_StringObject.EMPTY

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def a2b_hqx(space, ascii):
    """Decode .hqx coding.  Returns (bin, done)."""

    # overestimate the resulting length
    res = StringBuilder(len(ascii))
    done = 0
    pending_value = 0
    pending_bits = 0

    for c in ascii:
        n = ord(table_a2b_hqx[ord(c)])
        if n <= 0x3F:
            pending_value = (pending_value << 6) | n
            pending_bits += 6
            if pending_bits == 24:
                # flush
                res.append(chr(pending_value >> 16))
                res.append(chr((pending_value >> 8) & 0xff))
                res.append(chr(pending_value & 0xff))
                pending_value = 0
                pending_bits = 0
        elif n == FAIL:
            raise_Error(space, 'Illegal character')
        elif n == DONE:
            if pending_bits >= 8:
                res.append(chr(pending_value >> (pending_bits - 8)))
            if pending_bits >= 16:
                res.append(chr((pending_value >> (pending_bits - 16)) & 0xff))
            done = 1
            break
        #elif n == SKIP: pass
    else:
        if pending_bits > 0:
            raise_Incomplete(space, 'String has incomplete number of bytes')
    return space.newtuple([space.wrap(res.build()), space.wrap(done)])

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
 def fn(_):
     s = StringBuilder()
     s.append("a")
     s.append("abc")
     s.append_slice("abc", 1, 2)
     s.append_multiple_char('d', 4)
     return s.build()

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
    def readline_w(self, space, w_limit=None):
        # For backwards compatibility, a (slowish) readline().
        limit = convert_size(space, w_limit)

        old_size = -1

        has_peek = space.findattr(self, space.wrap("peek"))

        builder = StringBuilder()
        size = 0

        while limit < 0 or size < limit:
            nreadahead = 1

            if has_peek:
                w_readahead = space.call_method(self, "peek", space.wrap(1))
                if not space.isinstance_w(w_readahead, space.w_str):
                    raise operationerrfmt(
                        space.w_IOError,
                        "peek() should have returned a bytes object, " "not '%s'",
                        space.type(w_readahead).getname(space),
                    )
                length = space.len_w(w_readahead)
                if length > 0:
                    n = 0
                    buf = space.str_w(w_readahead)
                    if limit >= 0:
                        while True:
                            if n >= length or n >= limit:
                                break
                            n += 1
                            if buf[n - 1] == "\n":
                                break
                    else:
                        while True:
                            if n >= length:
                                break
                            n += 1
                            if buf[n - 1] == "\n":
                                break
                    nreadahead = n

            w_read = space.call_method(self, "read", space.wrap(nreadahead))
            if not space.isinstance_w(w_read, space.w_str):
                raise operationerrfmt(
                    space.w_IOError,
                    "peek() should have returned a bytes object, " "not '%s'",
                    space.type(w_read).getname(space),
                )
            read = space.str_w(w_read)
            if not read:
                break

            size += len(read)
            builder.append(read)

            if read[-1] == "\n":
                break

        return space.wrap(builder.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
class StringBuilderWithOneCharCancellable(object):

    def __init__(self, crlf, initial):
        self.crlf = crlf
        self.builder = StringBuilder(initial)
        self.pending = -1

    def _flush(self):
        if self.pending >= 0:
            self.builder.append(chr(self.pending))
            self.pending = -1
    _flush._always_inline_ = True

    def append(self, c):
        self._flush()
        self.pending = ord(c)

    def newline(self):
        self._flush()
        if self.crlf: self.builder.append('\r')
        self.pending = ord('\n')

    def to_hex(self, c):
        self._flush()
        uvalue = ord(c)
        self.builder.append("0123456789ABCDEF"[uvalue >> 4])
        self.builder.append("0123456789ABCDEF"[uvalue & 0xf])

    def build(self):
        self._flush()
        return self.builder.build()

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def _operate(stream, data, flush, max_length, cfunc, while_doing):
    """Common code for compress() and decompress().
    """
    # Prepare the input buffer for the stream
    with lltype.scoped_alloc(rffi.CCHARP.TO, len(data)) as inbuf:
        for i in xrange(len(data)):
            inbuf[i] = data[i]
        stream.c_next_in = rffi.cast(Bytefp, inbuf)
        rffi.setintfield(stream, 'c_avail_in', len(data))

        # Prepare the output buffer
        with lltype.scoped_alloc(rffi.CCHARP.TO, OUTPUT_BUFFER_SIZE) as outbuf:
            # Strategy: we call deflate() to get as much output data as fits in
            # the buffer, then accumulate all output into a StringBuffer
            # 'result'.
            result = StringBuilder()

            while True:
                stream.c_next_out = rffi.cast(Bytefp, outbuf)
                bufsize = OUTPUT_BUFFER_SIZE
                if max_length < bufsize:
                    if max_length <= 0:
                        err = Z_OK
                        break
                    bufsize = max_length
                max_length -= bufsize
                rffi.setintfield(stream, 'c_avail_out', bufsize)
                err = cfunc(stream, flush)
                if err == Z_OK or err == Z_STREAM_END:
                    # accumulate data into 'result'
                    avail_out = rffi.cast(lltype.Signed, stream.c_avail_out)
                    result.append_charpsize(outbuf, bufsize - avail_out)
                    # if the output buffer is full, there might be more data
                    # so we need to try again.  Otherwise, we're done.
                    if avail_out > 0:
                        break
                    # We're also done if we got a Z_STREAM_END (which should
                    # only occur when flush == Z_FINISH).
                    if err == Z_STREAM_END:
                        break
                    else:
                        continue
                elif err == Z_BUF_ERROR:
                    avail_out = rffi.cast(lltype.Signed, stream.c_avail_out)
                    # When compressing, we will only get Z_BUF_ERROR if
                    # the output buffer was full but there wasn't more
                    # output when we tried again, so it is not an error
                    # condition.
                    if avail_out == bufsize:
                        break

                # fallback case: report this error
                raise RZlibError.fromstream(stream, err, while_doing)

    # When decompressing, if the compressed stream of data was truncated,
    # then the zlib simply returns Z_OK and waits for more.  If it is
    # complete it returns Z_STREAM_END.
    return (result.build(),
            err,
            rffi.cast(lltype.Signed, stream.c_avail_in))

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def descr_buffer__new__(space, w_subtype, w_object, offset=0, size=-1):
    # w_subtype can only be exactly 'buffer' for now
    if not space.is_w(w_subtype, space.gettypefor(Buffer)):
        raise OperationError(space.w_TypeError,
                             space.wrap("argument 1 must be 'buffer'"))

    if space.isinstance_w(w_object, space.w_unicode):
        # unicode objects support the old buffer interface
        # but not the new buffer interface (change in python  2.7)
        from pypy.rlib.rstruct.unichar import pack_unichar, UNICODE_SIZE
        unistr = space.unicode_w(w_object)
        builder = StringBuilder(len(unistr) * UNICODE_SIZE)
        for unich in unistr:
            pack_unichar(unich, builder)
        from pypy.interpreter.buffer import StringBuffer
        w_buffer = space.wrap(StringBuffer(builder.build()))
    else:
        w_buffer = space.buffer(w_object)

    buffer = space.interp_w(Buffer, w_buffer)    # type-check
    if offset == 0 and size == -1:
        return w_buffer
    # handle buffer slices
    if offset < 0:
        raise OperationError(space.w_ValueError,
                             space.wrap("offset must be zero or positive"))
    if size < -1:
        raise OperationError(space.w_ValueError,
                             space.wrap("size must be zero or positive"))
    if isinstance(buffer, RWBuffer):
        buffer = RWSubBuffer(buffer, offset, size)
    else:
        buffer = SubBuffer(buffer, offset, size)
    return space.wrap(buffer)

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def rledecode_hqx(space, hexbin):
    "Decode hexbin RLE-coded string."

    # that's a guesstimation of the resulting length
    res = StringBuilder(len(hexbin))

    end = len(hexbin)
    i = 0
    lastpushed = -1
    while i < end:
        c = hexbin[i]
        i += 1
        if c != '\x90':
            res.append(c)
            lastpushed = ord(c)
        else:
            if i == end:
                raise_Incomplete(space, 'String ends with the RLE code \x90')
            count = ord(hexbin[i]) - 1
            i += 1
            if count < 0:
                res.append('\x90')
                lastpushed = 0x90
            else:
                if lastpushed < 0:
                    raise_Error(space, 'String starts with the RLE code \x90')
                res.append_multiple_char(chr(lastpushed), count)
    return space.wrap(res.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
def str_translate__String_ANY_ANY(space, w_string, w_table, w_deletechars=''):
    """charfilter - unicode handling is not implemented

    Return a copy of the string where all characters occurring
    in the optional argument deletechars are removed, and the
    remaining characters have been mapped through the given translation table,
    which must be a string of length 256"""

    if space.is_w(w_table, space.w_None):
        table = DEFAULT_NOOP_TABLE
    else:
        table = space.bufferstr_w(w_table)
        if len(table) != 256:
            raise OperationError(
                space.w_ValueError,
                space.wrap("translation table must be 256 characters long"))

    string = w_string._value
    deletechars = space.str_w(w_deletechars)
    if len(deletechars) == 0:
        buf = StringBuilder(len(string))
        for char in string:
            buf.append(table[ord(char)])
    else:
        buf = StringBuilder()
        deletion_table = [False] * 256
        for c in deletechars:
            deletion_table[ord(c)] = True
        for char in string:
            if not deletion_table[ord(char)]:
                buf.append(table[ord(char)])
    return W_StringObject(buf.build())

# 需要导入模块: from pypy.rlib.rstring import StringBuilder [as 别名]
# 或者: from pypy.rlib.rstring.StringBuilder import build [as 别名]
 def fn(_):
     s = StringBuilder(4)
     got = []
     for i in range(50):
         s.append(chr(33+i))
         got.append(s.build())
         gc.collect()
     return ' '.join(got)