From b4e38d7ea765422bf301980634b7b948fe989ae1 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周三, 19 6月 2013 23:10:02 +0800
Subject: [PATCH] Convert parameter handling to new lexer
---
libscpi/src/parser.c | 297 +++++++++++++++++++++++------------------------------------
1 files changed, 115 insertions(+), 182 deletions(-)
diff --git a/libscpi/src/parser.c b/libscpi/src/parser.c
index aa3806a..99de301 100644
--- a/libscpi/src/parser.c
+++ b/libscpi/src/parser.c
@@ -43,28 +43,6 @@
#include "utils.h"
#include "scpi/error.h"
-static void paramSkipBytes(scpi_t * context, size_t num);
-static void paramSkipWhitespace(scpi_t * context);
-static bool_t paramNext(scpi_t * context, bool_t mandatory);
-
-/*
-int _strnicmp(const char* s1, const char* s2, int len) {
- int result = 0;
- int i;
-
- for (i = 0; i < len && s1[i] && s2[i]; i++) {
- char c1 = tolower(s1[i]);
- char c2 = tolower(s2[i]);
- if (c1 != c2) {
- result = (int) c1 - (int) c2;
- break;
- }
- }
-
- return result;
-}
- */
-
/**
* Write data to SCPI output
* @param context
@@ -123,7 +101,8 @@
* @param context
*/
static void processCommand(scpi_t * context) {
- const scpi_command_t * cmd = context->paramlist.cmd;
+ const scpi_command_t * cmd = context->param_list.cmd;
+ lex_state_t * state = &context->param_list.lex_state;
context->cmd_error = FALSE;
context->output_count = 0;
@@ -140,11 +119,8 @@
/* conditionaly write new line */
writeNewLine(context);
- /* skip all whitespaces */
- paramSkipWhitespace(context);
-
/* set error if command callback did not read all parameters */
- if (context->paramlist.length != 0 && !context->cmd_error) {
+ if (state->pos < (state->buffer + state->len) && !context->cmd_error) {
SCPI_ErrorPush(context, SCPI_ERROR_PARAMETER_NOT_ALLOWED);
}
}
@@ -161,7 +137,7 @@
for (i = 0; context->cmdlist[i].pattern != NULL; i++) {
cmd = &context->cmdlist[i];
if (matchCommand(cmd->pattern, header, len)) {
- context->paramlist.cmd = cmd;
+ context->param_list.cmd = cmd;
return TRUE;
}
}
@@ -194,8 +170,9 @@
if (state->programHeader.len > 0) {
if (findCommandHeader(context, state->programHeader.ptr, state->programHeader.len)) {
- context->paramlist.parameters = state->programData.ptr;
- context->paramlist.length = state->programData.len;
+ context->param_list.lex_state.buffer = state->programData.ptr;
+ context->param_list.lex_state.pos = context->param_list.lex_state.buffer;
+ context->param_list.lex_state.len = state->programData.len;
processCommand(context);
@@ -285,8 +262,7 @@
* @param data
* @return
*/
-size_t SCPI_ResultString(scpi_t * context, const char * data) {
- size_t len = strlen(data);
+size_t SCPI_ResultCharacters(scpi_t * context, const char * data, size_t len) {
size_t result = 0;
result += writeDelimiter(context);
result += writeData(context, data, len);
@@ -301,10 +277,31 @@
* @return
*/
size_t SCPI_ResultInt(scpi_t * context, int32_t val) {
- char buffer[12];
+ return SCPI_ResultIntBase(context, val, 10);
+}
+
+static const char * getBasePrefix(int8_t base) {
+ switch (base) {
+ case 2: return "#B";
+ case 8: return "#Q";
+ case 16: return "#H";
+ default: return NULL;
+ }
+}
+
+size_t SCPI_ResultIntBase(scpi_t * context, int32_t val, int8_t base) {
+ char buffer[33];
+ const char * basePrefix;
size_t result = 0;
- size_t len = longToStr(val, buffer, sizeof (buffer));
+ size_t len;
+
+ len = longToStr(val, buffer, sizeof (buffer), base);
+ basePrefix = getBasePrefix(base);
+
result += writeDelimiter(context);
+ if (basePrefix != NULL) {
+ result += writeData(context, basePrefix, 2);
+ }
result += writeData(context, buffer, len);
context->output_count++;
return result;
@@ -345,174 +342,110 @@
/* parsing parameters */
-/**
- * Skip num bytes from the begginig of parameters
- * @param context
- * @param num
- */
-void paramSkipBytes(scpi_t * context, size_t num) {
- if (context->paramlist.length < num) {
- num = context->paramlist.length;
- }
- context->paramlist.parameters += num;
- context->paramlist.length -= num;
-}
+bool_t SCPI_Parameter(scpi_t * context, scpi_parameter_t * parameter, bool_t mandatory) {
+ token_t token;
+ lex_state_t * state;
+ int32_t value;
-/**
- * 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);
-}
+ parameter->data.ptr = NULL;
+ parameter->data.len = 0;
+ parameter->number.value = 0;
+ parameter->number.base = 10;
+ parameter->number.unit = SCPI_UNIT_NONE;
+ parameter->number.type = SCPI_NUM_NUMBER;
+ parameter->type = TokUnknown;
-/**
- * Find next parameter
- * @param context
- * @param mandatory
- * @return
- */
-bool_t paramNext(scpi_t * context, bool_t mandatory) {
- paramSkipWhitespace(context);
- if (context->paramlist.length == 0) {
+ state = &context->param_list.lex_state;
+
+ if (state->pos >= (state->buffer + state->len)) {
if (mandatory) {
SCPI_ErrorPush(context, SCPI_ERROR_MISSING_PARAMETER);
+ } else {
+ parameter->number.type = SCPI_NUM_DEF;
+ parameter->type = TokProgramMnemonic; // TODO: select something different
}
return FALSE;
}
if (context->input_count != 0) {
- if (context->paramlist.parameters[0] == ',') {
- paramSkipBytes(context, 1);
- paramSkipWhitespace(context);
- } else {
+ SCPI_LexComma(state, &token);
+ if (token.type != TokComma) {
SCPI_ErrorPush(context, SCPI_ERROR_INVALID_SEPARATOR);
return FALSE;
}
}
+
context->input_count++;
- return TRUE;
+
+ SCPI_ParseProgramData(&context->param_list.lex_state, &token);
+
+ parameter->type = token.type;
+ parameter->data.ptr = token.ptr;
+ parameter->data.len = token.len;
+
+ switch (token.type) {
+ case TokHexnum:
+ parameter->number.base = 16;
+ strToLong(token.ptr, &value, 16);
+ parameter->number.value = value;
+ return TRUE;
+ case TokOctnum:
+ parameter->number.base = 8;
+ strToLong(token.ptr, &value, 8);
+ parameter->number.value = value;
+ return TRUE;
+ case TokBinnum:
+ parameter->number.base = 2;
+ strToLong(token.ptr, &value, 2);
+ parameter->number.value = value;
+ return TRUE;
+ case TokProgramMnemonic:
+ return TRUE;
+ case TokDecimalNumericProgramData:
+ strToDouble(token.ptr, ¶meter->number.value);
+ return TRUE;
+ case TokDecimalNumericProgramDataWithSuffix:
+ strToDouble(token.ptr, ¶meter->number.value);
+ return TRUE;
+ case TokArbitraryBlockProgramData:
+ return TRUE;
+ case TokSingleQuoteProgramData:
+ // TODO: replace double "single qoute"
+ return TRUE;
+ case TokDoubleQuoteProgramData:
+ // TODO: replace double "double qoute"
+ return TRUE;
+ case TokProgramExpression:
+ return TRUE;
+ default:
+ parameter->type = TokUnknown;
+ parameter->data.ptr = NULL;
+ parameter->data.len = 0;
+ SCPI_ErrorPush(context, SCPI_ERROR_UNKNOWN_PARAMETER);
+ return FALSE;
+ }
}
-/**
- * Parse integer parameter
- * @param context
- * @param value
- * @param mandatory
- * @return
- */
-bool_t SCPI_ParamInt(scpi_t * context, int32_t * value, bool_t mandatory) {
- const char * param;
- size_t param_len;
- size_t num_len;
-
- if (!value) {
- return FALSE;
+int32_t SCPI_ParamGetIntVal(scpi_t * context, scpi_parameter_t * parameter) {
+ switch (parameter->type) {
+ case TokHexnum:
+ case TokOctnum:
+ case TokBinnum:
+ case TokDecimalNumericProgramData:
+ case TokDecimalNumericProgramDataWithSuffix:
+ return parameter->number.value;
+ default:
+ SCPI_ErrorPush(context, SCPI_ERROR_INVALID_PARAMETER);
+ return 0;
}
-
- if (!SCPI_ParamString(context, ¶m, ¶m_len, mandatory)) {
- return FALSE;
- }
-
- num_len = strToLong(param, value);
-
- if (num_len != param_len) {
- SCPI_ErrorPush(context, SCPI_ERROR_SUFFIX_NOT_ALLOWED);
- return FALSE;
- }
-
- return TRUE;
}
-/**
- * Parse double parameter
- * @param context
- * @param value
- * @param mandatory
- * @return
- */
-bool_t SCPI_ParamDouble(scpi_t * context, double * value, bool_t mandatory) {
- const char * param;
- size_t param_len;
- size_t num_len;
-
- if (!value) {
- return FALSE;
- }
-
- if (!SCPI_ParamString(context, ¶m, ¶m_len, mandatory)) {
- return FALSE;
- }
-
- num_len = strToDouble(param, value);
-
- if (num_len != param_len) {
- SCPI_ErrorPush(context, SCPI_ERROR_SUFFIX_NOT_ALLOWED);
- return FALSE;
- }
-
- return TRUE;
+double SCPI_ParamGetDoubleVal(scpi_t * context, scpi_parameter_t * parameter) {
+ return parameter->number.value;
}
-/**
- * Parse string parameter
- * @param context
- * @param value
- * @param len
- * @param mandatory
- * @return
- */
-bool_t SCPI_ParamString(scpi_t * context, const char ** value, size_t * len, bool_t mandatory) {
- size_t length;
-
- if (!value || !len) {
- return FALSE;
- }
-
- if (!paramNext(context, mandatory)) {
- return FALSE;
- }
-
- if (locateStr(context->paramlist.parameters, context->paramlist.length, value, &length)) {
- paramSkipBytes(context, length);
- paramSkipWhitespace(context);
- if (len) {
- *len = length;
- }
- return TRUE;
- }
-
- return FALSE;
-}
-
-/**
- * Parse text parameter (can be inside "")
- * @param context
- * @param value
- * @param len
- * @param mandatory
- * @return
- */
-bool_t SCPI_ParamText(scpi_t * context, const char ** value, size_t * len, 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;
+void SCPI_ParamGetTextVal(scpi_t * context, scpi_parameter_t * parameter, const char ** data, int32_t * len) {
+ *data = parameter->data.ptr;
+ *len = parameter->data.len;
}
int SCPI_ParseProgramData(lex_state_t * state, token_t * token) {
--
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