/**
* Find next parameter
* @param context
* @param mandatory
* @return
*/
scpi_bool_t paramNext(scpi_t * context, scpi_bool_t mandatory) {
paramSkipWhitespace(context);
if (context->paramlist.length == 0) {
if (mandatory) {
SCPI_ErrorPush(context, SCPI_ERROR_MISSING_PARAMETER);
}
return FALSE;
}
if (context->input_count != 0) {
if (context->paramlist.parameters[0] == ',') {
paramSkipBytes(context, 1);
paramSkipWhitespace(context);
} else {
SCPI_ErrorPush(context, SCPI_ERROR_INVALID_SEPARATOR);
return FALSE;
}
}
context->input_count++;
return TRUE;
}
/**
* Parse text parameter (can be inside "")
* @param context
* @param value Pointer to string buffer where pointer to non-null terminated string will be returned
* @param len Length of returned non-null terminated string
* @param mandatory
* @return
*/
scpi_bool_t SCPI_ParamText(scpi_t * context, const char ** value, size_t * len, scpi_bool_t mandatory) {
size_t length;
if (!value || !len) {
return FALSE;
}
if (!paramNext(context, mandatory)) {
return FALSE;
}
if (locateText(context->paramlist.parameters, context->paramlist.length, value, &length)) {
paramSkipBytes(context, length);
if (len) {
*len = length;
}
return TRUE;
}
return FALSE;
}
/**
* Parse string parameter
* @param context
* @param value
* @param len
* @param mandatory
* @return
*/
scpi_bool_t SCPIParser::SCPI_ParamString(const char ** value, size_t * len, scpi_bool_t mandatory) {
size_t length;
if (!value || !len) {
return FALSE;
}
if (!paramNext(mandatory)) {
return FALSE;
}
if (locateStr(context.paramlist.parameters, context.paramlist.length, value, &length)) {
paramSkipBytes(length);
paramSkipWhitespace();
if (len) {
*len = length;
}
return TRUE;
}
return FALSE;
}
/**
* Skip white spaces from the beggining of parameters
* @param context
*/
void paramSkipWhitespace(scpi_t * context) {
size_t ws = skipWhitespace(context->paramlist.parameters, context->paramlist.length);
paramSkipBytes(context, ws);
}
/**
* Skip white spaces from the beggining of parameters
* @param context
*/
void SCPIParser::paramSkipWhitespace() {
size_t ws = skipWhitespace(context.paramlist.parameters, context.paramlist.length);
paramSkipBytes(ws);
}