Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

Change PyUnicode_EncodeUnicodeEscape() to return a bytes object. 

However PyUnicode_AsUnicodeEscapeString() (which is used by
Objects/fileobject.c::file_repr()) still returns a str8 object.
Give unicode_repr() it's own implementation which returns a str8
object (it was formerly just calling unicodeescape_string()
which was used to implement PyUnicode_EncodeUnicodeEscape() too),
because once repr() is required to return unicode objects it
needs its own implementation anyway.
This commit is contained in:
Walter Dörwald 2007-05-12 11:08:06 +00:00
parent 1324c6f5e7
commit 79e913eac7
1 changed files with 179 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

228
Objects/unicodeobject.c
View File

@ -2094,16 +2094,14 @@ Py_LOCAL_INLINE(const Py_UNICODE *) findchar(const Py_UNICODE *s,
return NULL;
}
static
PyObject *unicodeescape_string(const Py_UNICODE *s,
Py_ssize_t size,
int quotes)
static const char *hexdigits = "0123456789abcdef";
PyObject *PyUnicode_EncodeUnicodeEscape(const Py_UNICODE *s,
Py_ssize_t size)
{
PyObject *repr;
char *p;
static const char *hexdigit = "0123456789abcdef";
/* XXX(nnorwitz): rather than over-allocating, it would be
better to choose a different scheme. Perhaps scan the
first N-chars of the string and allocate based on that size.
@ -2122,8 +2120,7 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
escape.
*/
repr = PyString_FromStringAndSize(NULL,
2
repr = PyBytes_FromStringAndSize(NULL,
#ifdef Py_UNICODE_WIDE
+ 10*size
#else
@ -2133,18 +2130,13 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
if (repr == NULL)
return NULL;
p = PyString_AS_STRING(repr);
p = PyBytes_AS_STRING(repr);
if (quotes) {
*p++ = (findchar(s, size, '\'') &&
!findchar(s, size, '"')) ? '"' : '\'';
}
while (size-- > 0) {
Py_UNICODE ch = *s++;
/* Escape quotes and backslashes */
if ((quotes &&
ch == (Py_UNICODE) PyString_AS_STRING(repr)[0]) || ch == '\\') {
/* Escape backslashes */
if (ch == '\\') {
*p++ = '\\';
*p++ = (char) ch;
continue;
@ -2155,14 +2147,14 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
else if (ch >= 0x10000) {
*p++ = '\\';
*p++ = 'U';
*p++ = hexdigit[(ch >> 28) & 0x0000000F];
*p++ = hexdigit[(ch >> 24) & 0x0000000F];
*p++ = hexdigit[(ch >> 20) & 0x0000000F];
*p++ = hexdigit[(ch >> 16) & 0x0000000F];
*p++ = hexdigit[(ch >> 12) & 0x0000000F];
*p++ = hexdigit[(ch >> 8) & 0x0000000F];
*p++ = hexdigit[(ch >> 4) & 0x0000000F];
*p++ = hexdigit[ch & 0x0000000F];
*p++ = hexdigits[(ch >> 28) & 0x0000000F];
*p++ = hexdigits[(ch >> 24) & 0x0000000F];
*p++ = hexdigits[(ch >> 20) & 0x0000000F];
*p++ = hexdigits[(ch >> 16) & 0x0000000F];
*p++ = hexdigits[(ch >> 12) & 0x0000000F];
*p++ = hexdigits[(ch >> 8) & 0x0000000F];
*p++ = hexdigits[(ch >> 4) & 0x0000000F];
*p++ = hexdigits[ch & 0x0000000F];
continue;
}
#else
@ -2177,14 +2169,14 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
ucs = (((ch & 0x03FF) << 10) | (ch2 & 0x03FF)) + 0x00010000;
*p++ = '\\';
*p++ = 'U';
*p++ = hexdigit[(ucs >> 28) & 0x0000000F];
*p++ = hexdigit[(ucs >> 24) & 0x0000000F];
*p++ = hexdigit[(ucs >> 20) & 0x0000000F];
*p++ = hexdigit[(ucs >> 16) & 0x0000000F];
*p++ = hexdigit[(ucs >> 12) & 0x0000000F];
*p++ = hexdigit[(ucs >> 8) & 0x0000000F];
*p++ = hexdigit[(ucs >> 4) & 0x0000000F];
*p++ = hexdigit[ucs & 0x0000000F];
*p++ = hexdigits[(ucs >> 28) & 0x0000000F];
*p++ = hexdigits[(ucs >> 24) & 0x0000000F];
*p++ = hexdigits[(ucs >> 20) & 0x0000000F];
*p++ = hexdigits[(ucs >> 16) & 0x0000000F];
*p++ = hexdigits[(ucs >> 12) & 0x0000000F];
*p++ = hexdigits[(ucs >> 8) & 0x0000000F];
*p++ = hexdigits[(ucs >> 4) & 0x0000000F];
*p++ = hexdigits[ucs & 0x0000000F];
continue;
}
/* Fall through: isolated surrogates are copied as-is */
@ -2197,10 +2189,10 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
if (ch >= 256) {
*p++ = '\\';
*p++ = 'u';
*p++ = hexdigit[(ch >> 12) & 0x000F];
*p++ = hexdigit[(ch >> 8) & 0x000F];
*p++ = hexdigit[(ch >> 4) & 0x000F];
*p++ = hexdigit[ch & 0x000F];
*p++ = hexdigits[(ch >> 12) & 0x000F];
*p++ = hexdigits[(ch >> 8) & 0x000F];
*p++ = hexdigits[(ch >> 4) & 0x000F];
*p++ = hexdigits[ch & 0x000F];
}
/* Map special whitespace to '\t', \n', '\r' */
@ -2221,36 +2213,39 @@ PyObject *unicodeescape_string(const Py_UNICODE *s,
else if (ch < ' ' || ch >= 0x7F) {
*p++ = '\\';
*p++ = 'x';
*p++ = hexdigit[(ch >> 4) & 0x000F];
*p++ = hexdigit[ch & 0x000F];
*p++ = hexdigits[(ch >> 4) & 0x000F];
*p++ = hexdigits[ch & 0x000F];
}
/* Copy everything else as-is */
else
*p++ = (char) ch;
}
if (quotes)
*p++ = PyString_AS_STRING(repr)[0];
*p = '\0';
_PyString_Resize(&repr, p - PyString_AS_STRING(repr));
if (PyBytes_Resize(repr, p - PyBytes_AS_STRING(repr))) {
Py_DECREF(repr);
return NULL;
}
return repr;
}
PyObject *PyUnicode_EncodeUnicodeEscape(const Py_UNICODE *s,
Py_ssize_t size)
{
return unicodeescape_string(s, size, 0);
}
PyObject *PyUnicode_AsUnicodeEscapeString(PyObject *unicode)
{
PyObject *s, *result;
if (!PyUnicode_Check(unicode)) {
PyErr_BadArgument();
return NULL;
}
return PyUnicode_EncodeUnicodeEscape(PyUnicode_AS_UNICODE(unicode),
s = PyUnicode_EncodeUnicodeEscape(PyUnicode_AS_UNICODE(unicode),
PyUnicode_GET_SIZE(unicode));
if (!s)
return NULL;
result = PyString_FromStringAndSize(PyBytes_AS_STRING(s),
PyBytes_GET_SIZE(s));
Py_DECREF(s);
return result;
}
/* --- Raw Unicode Escape Codec ------------------------------------------- */
@ -6521,9 +6516,140 @@ unicode_replace(PyUnicodeObject *self, PyObject *args)
static
PyObject *unicode_repr(PyObject *unicode)
{
return unicodeescape_string(PyUnicode_AS_UNICODE(unicode),
PyUnicode_GET_SIZE(unicode),
1);
PyObject *repr;
char *p;
Py_UNICODE *s = PyUnicode_AS_UNICODE(unicode);
Py_ssize_t size = PyUnicode_GET_SIZE(unicode);
/* XXX(nnorwitz): rather than over-allocating, it would be
better to choose a different scheme. Perhaps scan the
first N-chars of the string and allocate based on that size.
*/
/* Initial allocation is based on the longest-possible unichr
escape.
In wide (UTF-32) builds '\U00xxxxxx' is 10 chars per source
unichr, so in this case it's the longest unichr escape. In
narrow (UTF-16) builds this is five chars per source unichr
since there are two unichrs in the surrogate pair, so in narrow
(UTF-16) builds it's not the longest unichr escape.
In wide or narrow builds '\uxxxx' is 6 chars per source unichr,
so in the narrow (UTF-16) build case it's the longest unichr
escape.
*/
repr = PyString_FromStringAndSize(NULL,
2 /* quotes */
#ifdef Py_UNICODE_WIDE
+ 10*size
#else
+ 6*size
#endif
+ 1);
if (repr == NULL)
return NULL;
p = PyString_AS_STRING(repr);
/* Add quote */
*p++ = (findchar(s, size, '\'') &&
!findchar(s, size, '"')) ? '"' : '\'';
while (size-- > 0) {
Py_UNICODE ch = *s++;
/* Escape quotes and backslashes */
if ((ch == (Py_UNICODE) PyString_AS_STRING(repr)[0]) || (ch == '\\')) {
*p++ = '\\';
*p++ = (char) ch;
continue;
}
#ifdef Py_UNICODE_WIDE
/* Map 21-bit characters to '\U00xxxxxx' */
else if (ch >= 0x10000) {
*p++ = '\\';
*p++ = 'U';
*p++ = hexdigits[(ch >> 28) & 0x0000000F];
*p++ = hexdigits[(ch >> 24) & 0x0000000F];
*p++ = hexdigits[(ch >> 20) & 0x0000000F];
*p++ = hexdigits[(ch >> 16) & 0x0000000F];
*p++ = hexdigits[(ch >> 12) & 0x0000000F];
*p++ = hexdigits[(ch >> 8) & 0x0000000F];
*p++ = hexdigits[(ch >> 4) & 0x0000000F];
*p++ = hexdigits[ch & 0x0000000F];
continue;
}
#else
/* Map UTF-16 surrogate pairs to '\U00xxxxxx' */
else if (ch >= 0xD800 && ch < 0xDC00) {
Py_UNICODE ch2;
Py_UCS4 ucs;
ch2 = *s++;
size--;
if (ch2 >= 0xDC00 && ch2 <= 0xDFFF) {
ucs = (((ch & 0x03FF) << 10) | (ch2 & 0x03FF)) + 0x00010000;
*p++ = '\\';
*p++ = 'U';
*p++ = hexdigits[(ucs >> 28) & 0x0000000F];
*p++ = hexdigits[(ucs >> 24) & 0x0000000F];
*p++ = hexdigits[(ucs >> 20) & 0x0000000F];
*p++ = hexdigits[(ucs >> 16) & 0x0000000F];
*p++ = hexdigits[(ucs >> 12) & 0x0000000F];
*p++ = hexdigits[(ucs >> 8) & 0x0000000F];
*p++ = hexdigits[(ucs >> 4) & 0x0000000F];
*p++ = hexdigits[ucs & 0x0000000F];
continue;
}
/* Fall through: isolated surrogates are copied as-is */
s--;
size++;
}
#endif
/* Map 16-bit characters to '\uxxxx' */
if (ch >= 256) {
*p++ = '\\';
*p++ = 'u';
*p++ = hexdigits[(ch >> 12) & 0x000F];
*p++ = hexdigits[(ch >> 8) & 0x000F];
*p++ = hexdigits[(ch >> 4) & 0x000F];
*p++ = hexdigits[ch & 0x000F];
}
/* Map special whitespace to '\t', \n', '\r' */
else if (ch == '\t') {
*p++ = '\\';
*p++ = 't';
}
else if (ch == '\n') {
*p++ = '\\';
*p++ = 'n';
}
else if (ch == '\r') {
*p++ = '\\';
*p++ = 'r';
}
/* Map non-printable US ASCII to '\xhh' */
else if (ch < ' ' || ch >= 0x7F) {
*p++ = '\\';
*p++ = 'x';
*p++ = hexdigits[(ch >> 4) & 0x000F];
*p++ = hexdigits[ch & 0x000F];
}
/* Copy everything else as-is */
else
*p++ = (char) ch;
}
/* Add quote */
*p++ = PyString_AS_STRING(repr)[0];
*p = '\0';
_PyString_Resize(&repr, p - PyString_AS_STRING(repr));
return repr;
}
PyDoc_STRVAR(rfind__doc__,