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Issue #14744: Inline unicode_writer_write_char() and unicode_write_str() 

Optimize also PyUnicode_Format(): call unicode_writer_prepare() only once
per argument.
This commit is contained in:
Victor Stinner 2012-05-09 22:24:08 +02:00
parent c1fdad3e48
commit ee4544c920
2 changed files with 79 additions and 76 deletions
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36
Objects/stringlib/unicode_format.h
View File

@ -500,6 +500,7 @@ render_field(PyObject *fieldobj, SubString *format_spec, unicode_writer_t *write
PyObject *result = NULL;
PyObject *format_spec_object = NULL;
PyObject *(*formatter)(PyObject *, PyObject *, Py_ssize_t, Py_ssize_t) = NULL;
Py_ssize_t len;
/* If we know the type exactly, skip the lookup of __format__ and just
call the formatter directly. */
@ -533,12 +534,19 @@ render_field(PyObject *fieldobj, SubString *format_spec, unicode_writer_t *write
result = PyObject_Format(fieldobj, format_spec_object);
}
if (result == NULL || PyUnicode_READY(result) == -1)
if (result == NULL)
goto done;
if (PyUnicode_READY(result) == -1)
goto done;
assert(PyUnicode_Check(result));
ok = (unicode_writer_write_str(writer, result, 0, PyUnicode_GET_LENGTH(result)) == 0);
len = PyUnicode_GET_LENGTH(result);
if (unicode_writer_prepare(writer,
len, PyUnicode_MAX_CHAR_VALUE(result)) == -1)
goto done;
copy_characters(writer->buffer, writer->pos,
result, 0, len);
writer->pos += len;
ok = 1;
done:
Py_XDECREF(format_spec_object);
Py_XDECREF(result);
@ -873,7 +881,8 @@ do_markup(SubString *input, PyObject *args, PyObject *kwargs,
SubString literal;
SubString field_name;
SubString format_spec;
Py_UCS4 conversion;
Py_UCS4 conversion, maxchar;
Py_ssize_t sublen;
int err;
MarkupIterator_init(&iter, input->str, input->start, input->end);
@ -881,11 +890,18 @@ do_markup(SubString *input, PyObject *args, PyObject *kwargs,
&field_name, &format_spec,
&conversion,
&format_spec_needs_expanding)) == 2) {
err = unicode_writer_write_str(writer,
literal.str, literal.start,
literal.end - literal.start);
if (err == -1)
return 0;
sublen = literal.end - literal.start;
if (sublen) {
maxchar = _PyUnicode_FindMaxChar(literal.str,
literal.start, literal.end);
err = unicode_writer_prepare(writer, sublen, maxchar);
if (err == -1)
return 0;
copy_characters(writer->buffer, writer->pos,
literal.str, literal.start, sublen);
writer->pos += sublen;
}
if (field_present)
if (!output_markup(&field_name, &format_spec,
format_spec_needs_expanding, conversion, writer,

119
Objects/unicodeobject.c
View File

@ -1150,14 +1150,15 @@ _copy_characters(PyObject *to, Py_ssize_t to_start,
void *from_data, *to_data;
int fast;
assert(0 <= how_many);
assert(0 <= from_start);
assert(0 <= to_start);
assert(PyUnicode_Check(from));
assert(PyUnicode_Check(to));
assert(PyUnicode_IS_READY(from));
assert(PyUnicode_IS_READY(to));
assert(PyUnicode_GET_LENGTH(from) >= how_many);
assert(from_start + how_many <= PyUnicode_GET_LENGTH(from));
assert(to_start + how_many <= PyUnicode_GET_LENGTH(to));
assert(0 <= how_many);
if (how_many == 0)
return 0;
@ -13271,48 +13272,6 @@ unicode_writer_prepare(unicode_writer_t *writer,
return 0;
}
Py_LOCAL_INLINE(int)
unicode_writer_write_str(
unicode_writer_t *writer,
PyObject *str, Py_ssize_t start, Py_ssize_t length)
{
Py_UCS4 maxchar;
assert(str != NULL);
assert(PyUnicode_Check(str));
if (PyUnicode_READY(str) == -1)
return -1;
assert(0 <= start);
assert(0 <= length);
assert(start + length <= PyUnicode_GET_LENGTH(str));
if (length == 0)
return 0;
maxchar = _PyUnicode_FindMaxChar(str, start, start + length);
if (unicode_writer_prepare(writer, length, maxchar) == -1)
return -1;
assert((writer->pos + length) <= PyUnicode_GET_LENGTH(writer->buffer));
copy_characters(writer->buffer, writer->pos,
str, start, length);
writer->pos += length;
return 0;
}
Py_LOCAL_INLINE(int)
unicode_writer_write_char(
unicode_writer_t *writer,
Py_UCS4 ch)
{
if (unicode_writer_prepare(writer, 1, ch) == -1)
return -1;
assert((writer->pos + 1) <= PyUnicode_GET_LENGTH(writer->buffer));
PyUnicode_WRITE(writer->kind, writer->data, writer->pos, ch);
writer->pos += 1;
return 0;
}
Py_LOCAL(PyObject *)
unicode_writer_finish(unicode_writer_t *writer)
{
@ -13791,6 +13750,8 @@ PyUnicode_Format(PyObject *format, PyObject *args)
void *fmt;
enum PyUnicode_Kind kind, fmtkind;
unicode_writer_t writer;
Py_ssize_t sublen;
Py_UCS4 maxchar;
if (format == NULL || args == NULL) {
PyErr_BadInternalCall();
@ -13833,8 +13794,15 @@ PyUnicode_Format(PyObject *format, PyObject *args)
}
if (fmtcnt < 0)
fmtpos--;
if (unicode_writer_write_str(&writer, uformat, nonfmtpos, fmtpos - nonfmtpos) < 0)
sublen = fmtpos - nonfmtpos;
maxchar = _PyUnicode_FindMaxChar(uformat,
nonfmtpos, nonfmtpos + sublen);
if (unicode_writer_prepare(&writer, sublen, maxchar) == -1)
goto onError;
copy_characters(writer.buffer, writer.pos,
uformat, nonfmtpos, sublen);
writer.pos += sublen;
}
else {
/* Got a format specifier */
@ -13849,6 +13817,8 @@ PyUnicode_Format(PyObject *format, PyObject *args)
PyObject *v = NULL;
void *pbuf = NULL;
Py_ssize_t pindex, len;
Py_UCS4 bufmaxchar;
Py_ssize_t buflen;
fmtpos++;
c = PyUnicode_READ(fmtkind, fmt, fmtpos);
@ -13991,8 +13961,10 @@ PyUnicode_Format(PyObject *format, PyObject *args)
}
if (c == '%') {
if (unicode_writer_write_char(&writer, '%') < 0)
if (unicode_writer_prepare(&writer, 1, '%') == -1)
goto onError;
PyUnicode_WRITE(writer.kind, writer.data, writer.pos, '%');
writer.pos += 1;
continue;
}
@ -14126,10 +14098,35 @@ PyUnicode_Format(PyObject *format, PyObject *args)
}
if (width < len)
width = len;
/* Compute the length and maximum character of the
written characters */
bufmaxchar = 127;
if (!(flags & F_LJUST)) {
if (sign) {
if ((width-1) > len)
bufmaxchar = Py_MAX(bufmaxchar, fill);
}
else {
if (width > len)
bufmaxchar = Py_MAX(bufmaxchar, fill);
}
}
maxchar = _PyUnicode_FindMaxChar(temp, 0, pindex+len);
bufmaxchar = Py_MAX(bufmaxchar, maxchar);
buflen = width;
if (sign && len == width)
buflen++;
if (unicode_writer_prepare(&writer, buflen, bufmaxchar) == -1)
goto onError;
/* Write characters */
if (sign) {
if (fill != ' ') {
if (unicode_writer_write_char(&writer, signchar) < 0)
goto onError;
PyUnicode_WRITE(writer.kind, writer.data, writer.pos, signchar);
writer.pos += 1;
}
if (width > len)
width--;
@ -14138,8 +14135,6 @@ PyUnicode_Format(PyObject *format, PyObject *args)
assert(PyUnicode_READ(kind, pbuf, pindex) == '0');
assert(PyUnicode_READ(kind, pbuf, pindex + 1) == c);
if (fill != ' ') {
if (unicode_writer_prepare(&writer, 2, 127) < 0)
goto onError;
PyUnicode_WRITE(writer.kind, writer.data, writer.pos, '0');
PyUnicode_WRITE(writer.kind, writer.data, writer.pos+1, c);
writer.pos += 2;
@ -14151,43 +14146,35 @@ PyUnicode_Format(PyObject *format, PyObject *args)
len -= 2;
}
if (width > len && !(flags & F_LJUST)) {
Py_ssize_t sublen;
sublen = width - len;
if (unicode_writer_prepare(&writer, sublen, fill) < 0)
goto onError;
FILL(writer.kind, writer.data, fill, writer.pos, sublen);
writer.pos += sublen;
width = len;
}
if (fill == ' ') {
if (sign) {
if (unicode_writer_write_char(&writer, signchar) < 0)
goto onError;
PyUnicode_WRITE(writer.kind, writer.data, writer.pos, signchar);
writer.pos += 1;
}
if ((flags & F_ALT) && (c == 'x' || c == 'X' || c == 'o')) {
assert(PyUnicode_READ(kind, pbuf, pindex) == '0');
assert(PyUnicode_READ(kind, pbuf, pindex+1) == c);
if (unicode_writer_prepare(&writer, 2, 127) < 0)
goto onError;
PyUnicode_WRITE(writer.kind, writer.data, writer.pos, '0');
PyUnicode_WRITE(writer.kind, writer.data, writer.pos+1, c);
writer.pos += 2;
pindex += 2;
}
}
/* Copy all characters, preserving len */
if (unicode_writer_write_str(&writer, temp, pindex, len) < 0)
goto onError;
copy_characters(writer.buffer, writer.pos,
temp, pindex, len);
writer.pos += len;
if (width > len) {
Py_ssize_t sublen = width - len;
if (unicode_writer_prepare(&writer, sublen, ' ') < 0)
goto onError;
sublen = width - len;
FILL(writer.kind, writer.data, ' ', writer.pos, sublen);
writer.pos += sublen;
}
if (dict && (argidx < arglen) && c != '%') {
PyErr_SetString(PyExc_TypeError,
"not all arguments converted during string formatting");