stringobject.c

python s60 1.4.5版本的源代码

const static char startswith__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.startswith(prefix[, start[, end]]) -> int\n\
\n\
Return 1 if S starts with the specified prefix, otherwise return 0.  With\n\
optional start, test S beginning at that position.  With optional end, stop\n\
comparing S at that position.";
#endif

static PyObject *
string_startswith(PyStringObject *self, PyObject *args)
{
	const char* str = PyString_AS_STRING(self);
	int len = PyString_GET_SIZE(self);
	const char* prefix;
	int plen;
	int start = 0;
	int end = INT_MAX;
	PyObject *subobj;

	if (!PyArg_ParseTuple(args, "O|O&O&:startswith", &subobj,
		_PyEval_SliceIndex, &start, _PyEval_SliceIndex, &end))
		return NULL;
	if (PyString_Check(subobj)) {
		prefix = PyString_AS_STRING(subobj);
		plen = PyString_GET_SIZE(subobj);
	}
#ifdef Py_USING_UNICODE
	else if (PyUnicode_Check(subobj)) {
	    	int rc;
		rc = PyUnicode_Tailmatch((PyObject *)self,
					  subobj, start, end, -1);
		if (rc == -1)
			return NULL;
		else
			return PyInt_FromLong((long) rc);
	}
#endif
	else if (PyObject_AsCharBuffer(subobj, &prefix, &plen))
		return NULL;

	/* adopt Java semantics for index out of range.  it is legal for
	 * offset to be == plen, but this only returns true if prefix is
	 * the empty string.
	 */
	if (start < 0 || start+plen > len)
		return PyInt_FromLong(0);

	if (!memcmp(str+start, prefix, plen)) {
		/* did the match end after the specified end? */
		if (end < 0)
			return PyInt_FromLong(1);
		else if (end - start < plen)
			return PyInt_FromLong(0);
		else
			return PyInt_FromLong(1);
	}
	else return PyInt_FromLong(0);
}


const static char endswith__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.endswith(suffix[, start[, end]]) -> int\n\
\n\
Return 1 if S ends with the specified suffix, otherwise return 0.  With\n\
optional start, test S beginning at that position.  With optional end, stop\n\
comparing S at that position.";
#endif

static PyObject *
string_endswith(PyStringObject *self, PyObject *args)
{
	const char* str = PyString_AS_STRING(self);
	int len = PyString_GET_SIZE(self);
	const char* suffix;
	int slen;
	int start = 0;
	int end = INT_MAX;
	int lower, upper;
	PyObject *subobj;

	if (!PyArg_ParseTuple(args, "O|O&O&:endswith", &subobj,
		_PyEval_SliceIndex, &start, _PyEval_SliceIndex, &end))
		return NULL;
	if (PyString_Check(subobj)) {
		suffix = PyString_AS_STRING(subobj);
		slen = PyString_GET_SIZE(subobj);
	}
#ifdef Py_USING_UNICODE
	else if (PyUnicode_Check(subobj)) {
	    	int rc;
		rc = PyUnicode_Tailmatch((PyObject *)self,
					  subobj, start, end, +1);
		if (rc == -1)
			return NULL;
		else
			return PyInt_FromLong((long) rc);
	}
#endif
	else if (PyObject_AsCharBuffer(subobj, &suffix, &slen))
		return NULL;

	if (start < 0 || start > len || slen > len)
		return PyInt_FromLong(0);

	upper = (end >= 0 && end <= len) ? end : len;
	lower = (upper - slen) > start ? (upper - slen) : start;

	if (upper-lower >= slen && !memcmp(str+lower, suffix, slen))
		return PyInt_FromLong(1);
	else return PyInt_FromLong(0);
}


const static char encode__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.encode([encoding[,errors]]) -> object\n\
\n\
Encodes S using the codec registered for encoding. encoding defaults\n\
to the default encoding. errors may be given to set a different error\n\
handling scheme. Default is 'strict' meaning that encoding errors raise\n\
a ValueError. Other possible values are 'ignore' and 'replace'.";
#endif

static PyObject *
string_encode(PyStringObject *self, PyObject *args)
{
    char *encoding = NULL;
    char *errors = NULL;
    if (!PyArg_ParseTuple(args, "|ss:encode", &encoding, &errors))
        return NULL;
    return PyString_AsEncodedObject((PyObject *)self, encoding, errors);
}


const static char decode__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.decode([encoding[,errors]]) -> object\n\
\n\
Decodes S using the codec registered for encoding. encoding defaults\n\
to the default encoding. errors may be given to set a different error\n\
handling scheme. Default is 'strict' meaning that encoding errors raise\n\
a ValueError. Other possible values are 'ignore' and 'replace'.";
#endif

static PyObject *
string_decode(PyStringObject *self, PyObject *args)
{
    char *encoding = NULL;
    char *errors = NULL;
    if (!PyArg_ParseTuple(args, "|ss:decode", &encoding, &errors))
        return NULL;
    return PyString_AsDecodedObject((PyObject *)self, encoding, errors);
}


const static char expandtabs__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.expandtabs([tabsize]) -> string\n\
\n\
Return a copy of S where all tab characters are expanded using spaces.\n\
If tabsize is not given, a tab size of 8 characters is assumed.";
#endif

static PyObject*
string_expandtabs(PyStringObject *self, PyObject *args)
{
    const char *e, *p;
    char *q;
    int i, j;
    PyObject *u;
    int tabsize = 8;

    if (!PyArg_ParseTuple(args, "|i:expandtabs", &tabsize))
	return NULL;

    /* First pass: determine size of output string */
    i = j = 0;
    e = PyString_AS_STRING(self) + PyString_GET_SIZE(self);
    for (p = PyString_AS_STRING(self); p < e; p++)
        if (*p == '\t') {
	    if (tabsize > 0)
		j += tabsize - (j % tabsize);
	}
        else {
            j++;
            if (*p == '\n' || *p == '\r') {
                i += j;
                j = 0;
            }
        }

    /* Second pass: create output string and fill it */
    u = PyString_FromStringAndSize(NULL, i + j);
    if (!u)
        return NULL;

    j = 0;
    q = PyString_AS_STRING(u);

    for (p = PyString_AS_STRING(self); p < e; p++)
        if (*p == '\t') {
	    if (tabsize > 0) {
		i = tabsize - (j % tabsize);
		j += i;
		while (i--)
		    *q++ = ' ';
	    }
	}
	else {
            j++;
	    *q++ = *p;
            if (*p == '\n' || *p == '\r')
                j = 0;
        }

    return u;
}

static PyObject *
pad(PyStringObject *self, int left, int right, char fill)
{
    PyObject *u;

    if (left < 0)
        left = 0;
    if (right < 0)
        right = 0;

    if (left == 0 && right == 0 && PyString_CheckExact(self)) {
        Py_INCREF(self);
        return (PyObject *)self;
    }

    u = PyString_FromStringAndSize(NULL,
				   left + PyString_GET_SIZE(self) + right);
    if (u) {
        if (left)
            memset(PyString_AS_STRING(u), fill, left);
        memcpy(PyString_AS_STRING(u) + left,
	       PyString_AS_STRING(self),
	       PyString_GET_SIZE(self));
        if (right)
            memset(PyString_AS_STRING(u) + left + PyString_GET_SIZE(self),
		   fill, right);
    }

    return u;
}

const static char ljust__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.ljust(width) -> string\n"
"\n"
"Return S left justified in a string of length width. Padding is\n"
"done using spaces.";
#endif

static PyObject *
string_ljust(PyStringObject *self, PyObject *args)
{
    int width;
    if (!PyArg_ParseTuple(args, "i:ljust", &width))
        return NULL;

    if (PyString_GET_SIZE(self) >= width && PyString_CheckExact(self)) {
        Py_INCREF(self);
        return (PyObject*) self;
    }

    return pad(self, 0, width - PyString_GET_SIZE(self), ' ');
}


const static char rjust__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.rjust(width) -> string\n"
"\n"
"Return S right justified in a string of length width. Padding is\n"
"done using spaces.";
#endif

static PyObject *
string_rjust(PyStringObject *self, PyObject *args)
{
    int width;
    if (!PyArg_ParseTuple(args, "i:rjust", &width))
        return NULL;

    if (PyString_GET_SIZE(self) >= width && PyString_CheckExact(self)) {
        Py_INCREF(self);
        return (PyObject*) self;
    }

    return pad(self, width - PyString_GET_SIZE(self), 0, ' ');
}


const static char center__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.center(width) -> string\n"
"\n"
"Return S centered in a string of length width. Padding is done\n"
"using spaces.";
#endif

static PyObject *
string_center(PyStringObject *self, PyObject *args)
{
    int marg, left;
    int width;

    if (!PyArg_ParseTuple(args, "i:center", &width))
        return NULL;

    if (PyString_GET_SIZE(self) >= width && PyString_CheckExact(self)) {
        Py_INCREF(self);
        return (PyObject*) self;
    }

    marg = width - PyString_GET_SIZE(self);
    left = marg / 2 + (marg & width & 1);

    return pad(self, left, marg - left, ' ');
}

const static char zfill__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.zfill(width) -> string\n"
"\n"
"Pad a numeric string S with zeros on the left, to fill a field\n"
"of the specified width.  The string S is never truncated.";
#endif

static PyObject *
string_zfill(PyStringObject *self, PyObject *args)
{
    int fill;
    PyObject *s;
    char *p;

    int width;
    if (!PyArg_ParseTuple(args, "i:zfill", &width))
        return NULL;

    if (PyString_GET_SIZE(self) >= width) {
        if (PyString_CheckExact(self)) {
            Py_INCREF(self);
            return (PyObject*) self;
        }
        else
            return PyString_FromStringAndSize(
                PyString_AS_STRING(self),
                PyString_GET_SIZE(self)
            );
    }

    fill = width - PyString_GET_SIZE(self);

    s = pad(self, fill, 0, '0');

    if (s == NULL)
        return NULL;

    p = PyString_AS_STRING(s);
    if (p[fill] == '+' || p[fill] == '-') {
        /* move sign to beginning of string */
        p[0] = p[fill];
        p[fill] = '0';
    }

    return (PyObject*) s;
}

const static char isspace__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.isspace() -> int\n"
"\n"
"Return 1 if there are only whitespace characters in S,\n"
"0 otherwise.";
#endif

static PyObject*
string_isspace(PyStringObject *self)
{
    register const unsigned char *p
        = (unsigned char *) PyString_AS_STRING(self);
    register const unsigned char *e;

    /* Shortcut for single character strings */
    if (PyString_GET_SIZE(self) == 1 &&
	isspace(*p))
	return PyInt_FromLong(1);

    /* Special case for empty strings */
    if (PyString_GET_SIZE(self) == 0)
	return PyInt_FromLong(0);

    e = p + PyString_GET_SIZE(self);
    for (; p < e; p++) {
	if (!isspace(*p))
	    return PyInt_FromLong(0);
    }
    return PyInt_FromLong(1);
}


const static char isalpha__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.isalpha() -> int\n\
\n\
Return 1 if  all characters in S are alphabetic\n\
and there is at least one character in S, 0 otherwise.";
#endif

static PyObject*
string_isalpha(PyStringObject *self)
{
    register const unsigned char *p
        = (unsigned char *) PyString_AS_STRING(self);
    register const unsigned char *e;

    /* Shortcut for single character strings */
    if (PyString_GET_SIZE(self) == 1 &&
	isalpha(*p))
	return PyInt_FromLong(1);

    /* Special case for empty strings */
    if (PyString_GET_SIZE(self) == 0)
	return PyInt_FromLong(0);

    e = p + PyString_GET_SIZE(self);
    for (; p < e; p++) {
	if (!isalpha(*p))
	    return PyInt_FromLong(0);
    }
    return PyInt_FromLong(1);
}


const static char isalnum__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.isalnum() -> int\n\
\n\
Return 1 if  all characters in S are alphanumeric\n\
and there is at least one character in S, 0 otherwise.";
#endif

static PyObject*
string_isalnum(PyStringObject *self)
{
    register const unsigned char *p
        = (unsigned char *) PyString_AS_STRING(self);
    register const unsigned char *e;

    /* Shortcut for single character strings */
    if (PyString_GET_SIZE(self) == 1 &&
	isalnum(*p))
	return PyInt_FromLong(1);

    /* Special case for empty strings */
    if (PyString_GET_SIZE(self) == 0)
	return PyInt_FromLong(0);

    e = p + PyString_GET_SIZE(self);
    for (; p < e; p++) {
	if (!isalnum(*p))
	    return PyInt_FromLong(0);
    }
    return PyInt_FromLong(1);
}


const static char isdigit__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.isdigit() -> int\n\
\n\
Return 1 if there are only digit characters in S,\n\
0 otherwise.";
#endif

static PyObject*
string_isdigit(PyStringObject *self)
{
    register const unsigned char *p
        = (unsigned char *) PyString_AS_STRING(self);
    register const unsigned char *e;

    /* Shortcut for single character strings */
    if (PyString_GET_SIZE(self) == 1 &&
	isdigit(*p))
	return PyInt_FromLong(1);

    /* Special case for empty strings */
    if (PyString_GET_SIZE(self) == 0)
	return PyInt_FromLong(0);

    e = p + PyString_GET_SIZE(self);
    for (; p < e; p++) {
	if (!isdigit(*p))
	    return PyInt_FromLong(0);
    }
    return PyInt_FromLong(1);
}


const static char islower__doc__[] =
#ifdef SYMBIAN
"";
#else
"S.islower() -> int\n\
\n\
Return 1 if  all cased characters in S are lowercase and there is\n\
at least one cased character in S, 0 otherwise.";
#endif

static PyObject*
string_islower(PyStringObject *self)
{
    register const unsigned char *p
        = (unsigned char *) PyString_AS_STRING(self);
    register co