+static int get_anim_parameter_value_ce(char *s)
+{
+ char *s_ptr = s;
+ char *pattern = "ce_change:custom_";
+ int pattern_len = strlen(pattern);
+ char *matching_char = strstr(s_ptr, pattern);
+ int result = ANIM_EVENT_NONE;
+
+ if (matching_char == NULL)
+ return ANIM_EVENT_NONE;
+
+ result = ANIM_EVENT_CE_CHANGE;
+
+ s_ptr = matching_char + pattern_len;
+
+ // check for custom element number ("custom_X" or "custom_XX" or "custom_XXX")
+ if (*s_ptr >= '0' && *s_ptr <= '9')
+ {
+ int gic_ce_nr = (*s_ptr++ - '0');
+
+ if (*s_ptr >= '0' && *s_ptr <= '9')
+ {
+ gic_ce_nr = 10 * gic_ce_nr + (*s_ptr++ - '0');
+
+ if (*s_ptr >= '0' && *s_ptr <= '9')
+ gic_ce_nr = 10 * gic_ce_nr + (*s_ptr++ - '0');
+ }
+
+ if (gic_ce_nr < 1 || gic_ce_nr > NUM_CUSTOM_ELEMENTS)
+ return ANIM_EVENT_NONE;
+
+ // store internal CE number (0 to 255, not "custom_1" to "custom_256")
+ gic_ce_nr--;
+
+ result |= gic_ce_nr << ANIM_EVENT_CE_BIT;
+ }
+ else
+ {
+ // invalid custom element number specified
+
+ return ANIM_EVENT_NONE;
+ }
+
+ // discard result if next character is neither delimiter nor whitespace
+ if (!(*s_ptr == ',' || *s_ptr == '\0' ||
+ *s_ptr == ' ' || *s_ptr == '\t'))
+ return ANIM_EVENT_NONE;
+
+ return result;
+}
+