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serialize/deserialize colors to/from bytes instead of strings

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it's a tiny bit faster and saves a bit of memory
This commit is contained in:
Dobatymo
2022-09-27 17:34:57 +08:00
parent 1f1dfa88dc
commit f1153c85c0
9 changed files with 47 additions and 78 deletions
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49
core/pe/modules/cache.c
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@@ -9,51 +9,31 @@
#include "common.h"
/* I know that there strtol out there, but it requires a pointer to
* a char, which would in turn require me to buffer my chars around,
* making the whole process slower.
*/
static long
xchar_to_long(char c)
{
if ((c >= 48) && (c <= 57)) { /* 0-9 */
return c - 48;
}
else if ((c >= 65) && (c <= 70)) { /* A-F */
return c - 55;
}
else if ((c >= 97) && (c <= 102)) { /* a-f */
return c - 87;
}
return 0;
}
static PyObject*
cache_string_to_colors(PyObject *self, PyObject *args)
cache_bytes_to_colors(PyObject *self, PyObject *args)
{
char *s;
Py_ssize_t char_count, color_count, i;
char *y;
Py_ssize_t char_count, i, color_count;
PyObject *result;
if (!PyArg_ParseTuple(args, "s#", &s, &char_count)) {
unsigned long r, g, b;
Py_ssize_t ci;
PyObject *color_tuple;
if (!PyArg_ParseTuple(args, "y#", &y, &char_count)) {
return NULL;
}
color_count = (char_count / 6);
color_count = char_count / 3;
result = PyList_New(color_count);
if (result == NULL) {
return NULL;
}
for (i=0; i<color_count; i++) {
long r, g, b;
Py_ssize_t ci;
PyObject *color_tuple;
ci = i * 6;
r = (xchar_to_long(s[ci]) << 4) + xchar_to_long(s[ci+1]);
g = (xchar_to_long(s[ci+2]) << 4) + xchar_to_long(s[ci+3]);
b = (xchar_to_long(s[ci+4]) << 4) + xchar_to_long(s[ci+5]);
ci = i * 3;
r = (unsigned char) y[ci];
g = (unsigned char) y[ci+1];
b = (unsigned char) y[ci+2];
color_tuple = inttuple(3, r, g, b);
if (color_tuple == NULL) {
@@ -67,8 +47,7 @@ cache_string_to_colors(PyObject *self, PyObject *args)
}
static PyMethodDef CacheMethods[] = {
{"string_to_colors", cache_string_to_colors, METH_VARARGS,
"Transform the string 's' in a list of 3 sized tuples."},
{"bytes_to_colors", cache_bytes_to_colors, METH_VARARGS, "Transform the bytes 's' into a list of 3 sized tuples."},
{NULL, NULL, 0, NULL} /* Sentinel */
};