/* 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"

static PyObject *cache_bytes_to_colors(PyObject *self, PyObject *args) {
  char *y;
  Py_ssize_t char_count, i, color_count;
  PyObject *result;
  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 / 3;
  result = PyList_New(color_count);
  if (result == NULL) {
    return NULL;
  }

  for (i = 0; i < color_count; i++) {
    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) {
      Py_DECREF(result);
      return NULL;
    }
    PyList_SET_ITEM(result, i, color_tuple);
  }

  return result;
}

static PyMethodDef CacheMethods[] = {
    {"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 */
};

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;
}