| | |
| | | */ |
| | | |
| | | #include "scpi/expression.h" |
| | | #include "scpi/error.h" |
| | | #include "scpi/parser.h" |
| | | |
| | | #include "lexer_private.h" |
| | | |
| | | /** |
| | | * Parse one range or single value |
| | | * @param state lexical state |
| | | * @param isRange return true if parsed expression is range |
| | | * @param valueFrom return parsed value from |
| | | * @param valueTo return parsed value to |
| | | * @return SCPI_EXPR_OK - parsing was succesful |
| | | * SCPI_EXPR_ERROR - parser error |
| | | * SCPI_EXPR_NO_MORE - no more data |
| | | */ |
| | | static scpi_expr_result_t numericRange(lex_state_t * state, scpi_bool_t * isRange, scpi_token_t * valueFrom, scpi_token_t * valueTo) |
| | | { |
| | | if (scpiLex_DecimalNumericProgramData(state, valueFrom)) { |
| | | if (scpiLex_Colon(state, valueTo)) { |
| | | *isRange = TRUE; |
| | | if (scpiLex_DecimalNumericProgramData(state, valueTo)) { |
| | | return SCPI_EXPR_OK; |
| | | } else { |
| | | return SCPI_EXPR_ERROR; |
| | | } |
| | | } else { |
| | | *isRange = FALSE; |
| | | return SCPI_EXPR_OK; |
| | | } |
| | | } |
| | | |
| | | return SCPI_EXPR_NO_MORE; |
| | | } |
| | | |
| | | /** |
| | | * Parse entry on specified position |
| | | * @param context scpi context |
| | | * @param param input parameter |
| | | * @param index index of position (start from 0) |
| | | * @param isRange return true if expression at index was range |
| | | * @param valueFrom return value from |
| | | * @param valueTo return value to |
| | | * @return SCPI_EXPR_OK - parsing was succesful |
| | | * SCPI_EXPR_ERROR - parser error |
| | | * SCPI_EXPR_NO_MORE - no more data |
| | | * @see SCPI_ExprNumericListEntryInt, SCPI_ExprNumericListEntryDouble |
| | | */ |
| | | scpi_expr_result_t SCPI_ExprNumericListEntry(scpi_t * context, scpi_parameter_t * param, int index, scpi_bool_t * isRange, scpi_parameter_t * valueFrom, scpi_parameter_t * valueTo) |
| | | { |
| | | lex_state_t lex; |
| | | int i; |
| | | scpi_expr_result_t res = SCPI_EXPR_OK; |
| | | |
| | | if (!isRange || !valueFrom || !valueTo || !param) { |
| | | SCPI_ErrorPush(context, SCPI_ERROR_SYSTEM_ERROR); |
| | | return SCPI_EXPR_ERROR; |
| | | } |
| | | |
| | | if (param->type != SCPI_TOKEN_PROGRAM_EXPRESSION) { |
| | | SCPI_ErrorPush(context, SCPI_ERROR_DATA_TYPE_ERROR); |
| | | return SCPI_EXPR_ERROR; |
| | | } |
| | | |
| | | lex.buffer = param->ptr + 1; |
| | | lex.pos = lex.buffer; |
| | | lex.len = param->len - 2; |
| | | |
| | | for (i = 0; i <= index; i++) { |
| | | res = numericRange(&lex, isRange, valueFrom, valueTo); |
| | | if (res != SCPI_EXPR_OK) { |
| | | break; |
| | | } |
| | | if (i != index) { |
| | | if (!scpiLex_Comma(&lex, valueFrom)) { |
| | | res = scpiLex_IsEos(&lex) ? SCPI_EXPR_NO_MORE : SCPI_EXPR_ERROR; |
| | | break; |
| | | } |
| | | } |
| | | } |
| | | |
| | | if (res == SCPI_EXPR_ERROR) { |
| | | SCPI_ErrorPush(context, SCPI_ERROR_EXPRESSION_PARSING_ERROR); |
| | | } |
| | | return res; |
| | | } |
| | | |
| | | /** |
| | | * Parse entry on specified position and convert result to int32_t |
| | | * @param context scpi context |
| | | * @param param input parameter |
| | | * @param index index of position (start from 0) |
| | | * @param isRange return true if expression at index was range |
| | | * @param valueFrom return value from |
| | | * @param valueTo return value to |
| | | * @return SCPI_EXPR_OK - parsing was succesful |
| | | * SCPI_EXPR_ERROR - parser error |
| | | * SCPI_EXPR_NO_MORE - no more data |
| | | * @see SCPI_ExprNumericListEntry, SCPI_ExprNumericListEntryDouble |
| | | */ |
| | | scpi_expr_result_t SCPI_ExprNumericListEntryInt(scpi_t * context, scpi_parameter_t * param, int index, scpi_bool_t * isRange, int32_t * valueFrom, int32_t * valueTo) |
| | | { |
| | | scpi_expr_result_t res; |
| | | scpi_bool_t range = FALSE; |
| | | scpi_parameter_t paramFrom; |
| | | scpi_parameter_t paramTo; |
| | | |
| | | res = SCPI_ExprNumericListEntry(context, param, index, &range, ¶mFrom, ¶mTo); |
| | | if (res == SCPI_EXPR_OK) { |
| | | *isRange = range; |
| | | SCPI_ParamToInt(context, ¶mFrom, valueFrom); |
| | | if (range) { |
| | | SCPI_ParamToInt(context, ¶mTo, valueTo); |
| | | } |
| | | } |
| | | |
| | | return res; |
| | | } |
| | | |
| | | /** |
| | | * Parse entry on specified position and convert result to double |
| | | * @param context scpi context |
| | | * @param param input parameter |
| | | * @param index index of position (start from 0) |
| | | * @param isRange return true if expression at index was range |
| | | * @param valueFrom return value from |
| | | * @param valueTo return value to |
| | | * @return SCPI_EXPR_OK - parsing was succesful |
| | | * SCPI_EXPR_ERROR - parser error |
| | | * SCPI_EXPR_NO_MORE - no more data |
| | | * @see SCPI_ExprNumericListEntry, SCPI_ExprNumericListEntryInt |
| | | */ |
| | | scpi_expr_result_t SCPI_ExprNumericListEntryDouble(scpi_t * context, scpi_parameter_t * param, int index, scpi_bool_t * isRange, double * valueFrom, double * valueTo) |
| | | { |
| | | scpi_expr_result_t res; |
| | | scpi_bool_t range = FALSE; |
| | | scpi_parameter_t paramFrom; |
| | | scpi_parameter_t paramTo; |
| | | |
| | | res = SCPI_ExprNumericListEntry(context, param, index, &range, ¶mFrom, ¶mTo); |
| | | if (res == SCPI_EXPR_OK) { |
| | | *isRange = range; |
| | | SCPI_ParamToDouble(context, ¶mFrom, valueFrom); |
| | | if (range) { |
| | | SCPI_ParamToDouble(context, ¶mTo, valueTo); |
| | | } |
| | | } |
| | | |
| | | return res; |
| | | } |