Function expand_plus_plus

lib/common/xml.c:257–316

void
expand_plus_plus(xmlNode* target, const char *name, const char *value)
{
    int offset = 1;
    int name_len = 0;
    int int_value = 0;
    int value_len = 0;

    const char *old_value = NULL;

    if(value == NULL || name == NULL) {
	return;
    }
    
    old_value = crm_element_value(target, name);

    if(old_value == NULL) {
	/* if no previous value, set unexpanded */
	goto set_unexpanded;

    } else if(strstr(value, name) != value) {
	goto set_unexpanded;
    }

    name_len = strlen(name);
    value_len = strlen(value);
    if(value_len < (name_len + 2)
       || value[name_len] != '+'
       || (value[name_len+1] != '+' && value[name_len+1] != '=')) {
	goto set_unexpanded;
    }

    /* if we are expanding ourselves,
     * then no previous value was set and leave int_value as 0
     */
    if(old_value != value) {
	int_value = char2score(old_value);
    }
    
    if(value[name_len+1] != '+') {
	const char *offset_s = value+(name_len+2);
	offset = char2score(offset_s);
    }
    int_value += offset;

    if(int_value > INFINITY) {
	int_value = INFINITY;
    }
    
    crm_xml_add_int(target, name, int_value);
    return;

  set_unexpanded:
    if(old_value == value) {
	/* the old value is already set, nothing to do */
	return;
    }
    crm_xml_add(target, name, value);