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/* Created By: Virgil Dupras
* Created On: 2010-01-30
* Copyright 2014 Hardcoded Software (http://www.hardcoded.net)
*
* This software is licensed under the "BSD" License as described in the "LICENSE" file,
* which should be included with this package. The terms are also available at
* http://www.hardcoded.net/licenses/bsd_license
*/
#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)
{
char *s;
Py_ssize_t char_count, color_count, i;
PyObject *result;
if (!PyArg_ParseTuple(args, "s#", &s, &char_count)) {
return NULL;
}
color_count = (char_count / 6);
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]);
color_tuple = inttuple(3, r, g, b);
if (color_tuple == NULL) {
Py_DECREF(result);
return NULL;
}
PyList_SET_ITEM(result, i, color_tuple);
}
return result;
}
static PyMethodDef CacheMethods[] = {
{"string_to_colors", cache_string_to_colors, METH_VARARGS,
"Transform the string 's' in a list of 3 sized tuples."},
{NULL, NULL, 0, NULL} /* Sentinel */
};
static struct PyModuleDef CacheDef = {
PyModuleDef_HEAD_INIT,
"_cache",
NULL,
-1,
CacheMethods,
NULL,
NULL,
NULL,
NULL
};
PyObject *
PyInit__cache(void)
{
PyObject *m = PyModule_Create(&CacheDef);
if (m == NULL) {
return NULL;
}
return m;
}
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