Diff: TokensHandling.cpp

Revision:

0:befccd954577

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TokensHandling.cpp	Tue Jun 09 10:21:57 2020 +0000
@@ -0,0 +1,88 @@
+#include "TokensHandling.h"
+#include "mbed.h"
+
+#define MAX_KEYWORD_NR 4
+
+enum Result {OK, ERR};
+
+struct Keyword{
+    enum KeywordCode eCode;
+    char cString[MAX_KEYWORD_STRING_LTH];
+};
+
+struct Keyword asKeywordList[MAX_KEYWORD_NR]={
+    {CALLIB, "callib"},
+    {GOTO,  "goto"},
+    {ID,  "id"},
+    {STEP,  "step"},
+};
+
+void TokensHandler::ReplaceCharactersInString(char *pcString,char cOldChar,char cNewChar){
+        char *CurrentChar = strchr(pcString,cOldChar);
+        while(*CurrentChar){
+            *CurrentChar = cNewChar;
+            CurrentChar = strchr(CurrentChar,cOldChar);
+        }
+}  
+
+
+unsigned char TokensHandler::ucFindTokensInString(char *pcString){
+    char *pcTokenString = pcString;
+    pcTokenString = strtok(pcTokenString, " ");
+    
+    for(ucTokenNr=0;((pcTokenString != NULL) && (ucTokenNr < MAX_TOKEN_NR));ucTokenNr++)
+    {      
+            asToken[ucTokenNr].uValue.pcString = pcTokenString;
+            pcTokenString = strtok(NULL, " ");
+    }
+    return ucTokenNr;
+}
+
+
+
+enum Result TokensHandler::eStringToKeyword (char pcStr[],enum KeywordCode *peKeywordCode){
+    unsigned char ucKeywordCounter;
+
+    for(ucKeywordCounter=0; ucKeywordCounter< MAX_KEYWORD_NR; ucKeywordCounter++){
+        
+        if( (strcmp(pcStr, asKeywordList[ucKeywordCounter].cString))==0){
+            *peKeywordCode = asKeywordList[ucKeywordCounter].eCode;
+            return OK;
+        }
+    }
+    return ERR;
+}
+
+void TokensHandler::DecodeTokens(void){
+    unsigned char ucTokenCounter;
+    struct Token *psCurrentToken;
+    unsigned int uiTokenValue;
+    enum KeywordCode eTokenCode;
+
+    for(ucTokenCounter= 0; ucTokenCounter< ucTokenNr; ucTokenCounter++){
+        psCurrentToken= &asToken[ucTokenCounter];
+    
+        if(sscanf(asToken[ucTokenCounter].uValue.pcString, "%x", &uiTokenValue) == 1 ){
+            psCurrentToken->eType= NUMBER;
+            psCurrentToken->uValue.uiNumber= uiTokenValue;
+        }
+        else if(OK== eStringToKeyword(psCurrentToken->uValue.pcString, &eTokenCode)){
+            psCurrentToken->eType=KEYWORD;
+            psCurrentToken->uValue.eKeyword=eTokenCode;
+        }
+        else{
+            psCurrentToken->eType=STRING;
+        }
+    }
+}
+
+void TokensHandler::DecodeMsg(char *pcString){
+    ucTokenNr= ucFindTokensInString(pcString);
+    ReplaceCharactersInString(pcString, ' ', NULL);
+    DecodeTokens();
+}
+
+TokensHandler::TokensHandler(){
+    ucTokenNr=0;    
+}
+