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Refactor VT parser for more speed

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No longer copy bytes into a separate buffer, instead parse them in place
in the read buffer
This commit is contained in:
Kovid Goyal
2023-11-05 10:24:00 +05:30
parent 23bb2e1b67
commit 6205fb32fd
19 changed files with 1037 additions and 1015 deletions
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9
kitty/data-types.c
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@@ -322,7 +322,6 @@ expand_ansi_c_escapes(PyObject *self UNUSED, PyObject *src) {
}
START_ALLOW_CASE_RANGE
#define C0_EXCEPT_NL_AND_SPACE 0x0 ... 0x9: case 0xb ... 0x1f: case 0x7f
static PyObject*
c0_replace_bytes(const char *input_data, Py_ssize_t input_sz) {
RAII_PyObject(ans, PyBytes_FromStringAndSize(NULL, input_sz * 3));
@@ -333,7 +332,7 @@ c0_replace_bytes(const char *input_data, Py_ssize_t input_sz) {
for (Py_ssize_t i = 0; i < input_sz; i++) {
const char x = input_data[i];
switch (x) {
case C0_EXCEPT_NL_AND_SPACE: {
case C0_EXCEPT_NL_SPACE_TAB: {
const uint32_t ch = 0x2400 + x;
const unsigned sz = encode_utf8(ch, buf);
for (unsigned c = 0; c < sz; c++, j++) output[j] = buf[c];
@@ -359,7 +358,7 @@ c0_replace_unicode(PyObject *input) {
bool changed = false;
for (Py_ssize_t i = 0; i < PyUnicode_GET_LENGTH(input); i++) {
Py_UCS4 ch = PyUnicode_READ(input_kind, input_data, i);
switch(ch) { case C0_EXCEPT_NL_AND_SPACE: ch += 0x2400; changed = true; }
switch(ch) { case C0_EXCEPT_NL_SPACE_TAB: ch += 0x2400; changed = true; }
if (ch > maxchar) maxchar = ch;
PyUnicode_WRITE(output_kind, output_data, i, ch);
}
@@ -373,7 +372,7 @@ c0_replace_unicode(PyObject *input) {
END_ALLOW_CASE_RANGE
static PyObject*
replace_c0_codes_except_for_newline_and_space(PyObject *self UNUSED, PyObject *obj) {
replace_c0_codes_except_nl_space_tab(PyObject *self UNUSED, PyObject *obj) {
if (PyUnicode_Check(obj)) {
return c0_replace_unicode(obj);
} else if (PyBytes_Check(obj)) {
@@ -402,7 +401,7 @@ find_in_memoryview(PyObject *self UNUSED, PyObject *args) {
}
static PyMethodDef module_methods[] = {
METHODB(replace_c0_codes_except_for_newline_and_space, METH_O),
METHODB(replace_c0_codes_except_nl_space_tab, METH_O),
{"wcwidth", (PyCFunction)wcwidth_wrap, METH_O, ""},
{"expand_ansi_c_escapes", (PyCFunction)expand_ansi_c_escapes, METH_O, ""},
{"get_docs_ref_map", (PyCFunction)get_docs_ref_map, METH_NOARGS, ""},