From 3b99af699baba3ddbec2fbe74af6392678fbe31d Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周二, 10 11月 2015 01:04:30 +0800
Subject: [PATCH] Add array result functions
---
libscpi/src/expression.c | 197 ++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 187 insertions(+), 10 deletions(-)
diff --git a/libscpi/src/expression.c b/libscpi/src/expression.c
index 833c7fd..010b40b 100644
--- a/libscpi/src/expression.c
+++ b/libscpi/src/expression.c
@@ -39,8 +39,17 @@
#include "lexer_private.h"
-static scpi_expr_result_t numericRange(lex_state_t * state, scpi_bool_t * isRange, scpi_token_t * valueFrom, scpi_token_t * valueTo)
-{
+/**
+ * Parse one range or single value
+ * @param state lexer 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;
@@ -58,8 +67,20 @@
return SCPI_EXPR_NO_MORE;
}
-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)
-{
+/**
+ * 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;
@@ -97,8 +118,20 @@
return res;
}
-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)
-{
+/**
+ * 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;
@@ -107,17 +140,29 @@
res = SCPI_ExprNumericListEntry(context, param, index, &range, ¶mFrom, ¶mTo);
if (res == SCPI_EXPR_OK) {
*isRange = range;
- SCPI_ParamToInt(context, ¶mFrom, valueFrom);
+ SCPI_ParamToInt32(context, ¶mFrom, valueFrom);
if (range) {
- SCPI_ParamToInt(context, ¶mTo, valueTo);
+ SCPI_ParamToInt32(context, ¶mTo, valueTo);
}
}
return res;
}
-scpi_expr_result_t SCPI_ExprNumericListEntryDouble(scpi_t * context, scpi_parameter_t * param, int index, scpi_bool_t * isRange, double * valueFrom, double * valueTo)
-{
+/**
+ * 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;
@@ -134,3 +179,135 @@
return res;
}
+
+/**
+ * Parse one channel_spec e.g. "1!5!8"
+ * @param context
+ * @param state lexer state
+ * @param values range values
+ * @param length length of values array
+ * @param dimensions real number of dimensions
+ */
+static scpi_expr_result_t channelSpec(scpi_t * context, lex_state_t * state, int32_t * values, size_t length, size_t * dimensions) {
+ scpi_parameter_t param;
+ size_t i = 0;
+ while (scpiLex_DecimalNumericProgramData(state, ¶m)) {
+ if (i < length) {
+ SCPI_ParamToInt32(context, ¶m, &values[i]);
+ }
+
+ if (scpiLex_SpecificCharacter(state, ¶m, '!')) {
+ i++;
+ } else {
+ *dimensions = i + 1;
+ return SCPI_EXPR_OK;
+ }
+ }
+
+ if (i == 0) {
+ return SCPI_EXPR_NO_MORE;
+ } else {
+ // there was at least one number followed by !, but after ! was not another number
+ return SCPI_EXPR_ERROR;
+ }
+}
+
+/**
+ * Parse channel_range e.g. "1!2:5!6"
+ * @param context
+ * @param state lexer state
+ * @param isRange return true if it is range
+ * @param valuesFrom return array of values from
+ * @param valuesTo return array of values to
+ * @param length length of values arrays
+ * @param dimensions real number of dimensions
+ */
+static scpi_expr_result_t channelRange(scpi_t * context, lex_state_t * state, scpi_bool_t * isRange, int32_t * valuesFrom, int32_t * valuesTo, size_t length, size_t * dimensions) {
+ scpi_token_t token;
+ scpi_expr_result_t err;
+ size_t fromDimensions;
+ size_t toDimensions;
+
+ err = channelSpec(context, state, valuesFrom, length, &fromDimensions);
+ if (err == SCPI_EXPR_OK) {
+ if (scpiLex_Colon(state, &token)) {
+ *isRange = TRUE;
+ err = channelSpec(context, state, valuesTo, length, &toDimensions);
+ if (err != SCPI_EXPR_OK) {
+ return SCPI_EXPR_ERROR;
+ }
+ if (fromDimensions != toDimensions) {
+ return SCPI_EXPR_ERROR;
+ }
+ *dimensions = fromDimensions;
+ } else {
+ *isRange = FALSE;
+ *dimensions = fromDimensions;
+ return SCPI_EXPR_OK;
+ }
+ }
+
+ return err;
+}
+
+/**
+ * Parse one list entry at specific position e.g. "1!2:5!6"
+ * @param context
+ * @param param
+ * @param index
+ * @param isRange return true if it is range
+ * @param valuesFrom return array of values from
+ * @param valuesTo return array of values to
+ * @param length length of values arrays
+ * @param dimensions real number of dimensions
+ */
+scpi_expr_result_t SCPI_ExprChannelListEntry(scpi_t * context, scpi_parameter_t * param, int index, scpi_bool_t * isRange, int32_t * valuesFrom, int32_t * valuesTo, size_t length, size_t * dimensions) {
+ lex_state_t lex;
+ int i;
+ scpi_expr_result_t res = SCPI_EXPR_OK;
+ scpi_token_t token;
+
+ if (!isRange || !param || !dimensions || (length && (!valuesFrom || !valuesTo))) {
+ 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;
+
+ // detect channel list expression
+ if (!scpiLex_SpecificCharacter(&lex, &token, '@')) {
+ SCPI_ErrorPush(context, SCPI_ERROR_EXPRESSION_PARSING_ERROR);
+ return SCPI_EXPR_ERROR;
+ }
+
+ for (i = 0; i <= index; i++) {
+ res = channelRange(context, &lex, isRange, valuesFrom, valuesTo, (i == index) ? length : 0, dimensions);
+ if (res != SCPI_EXPR_OK) {
+ break;
+ }
+ if (i != index) {
+ if (!scpiLex_Comma(&lex, &token)) {
+ 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);
+ }
+ if (res == SCPI_EXPR_NO_MORE) {
+ if (!scpiLex_IsEos(&lex)) {
+ res = SCPI_EXPR_ERROR;
+ SCPI_ErrorPush(context, SCPI_ERROR_EXPRESSION_PARSING_ERROR);
+ }
+ }
+ return res;
+}
--
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