merged coding styles

table.c

@@ -1,12 +1,113 @@
-#include <table.h>
+#include <symbolTablele.h>
 #include <stdlib.h>
+#include <string.h>
 
 
 /*At the start of the execution : the whole array is empty*/
-symbolTable = malloc(sizeof(symbol) * START_TABLE_SIZE)
+symbolTable = malloc(sizeof(symbol) * START_TABLE_SIZE);
+
 currentIndex = 0;
 maxIndex = START_TABLE_SIZE;
 
+currentDepth = 0;
+
+/* Error display */
+void error(char* mess){
+    printf("ERROR : %s\n", &mess);
+    exit(-1);
+}
+
+/* Returns the offset from EBP to the symbol in the stack */
+int getOffset(char* name){
+    return (ebp + getStruct(name).offset);
+}
+
+/* Returns the structure with this name */
+Symbol getStruct(char* name){
+    for(int i=0; i < currentIndex; i++){
+        if (symbolTable[i].name == name){
+            return symbolTable[i];
+        }
+    }
+    error("No structure found");
+}
+
+/* Returns the index with this name*/
+int getIndex(char* name){
+    for(int i=0; i < currentIndex; i++){
+        if (strcmp(symbolTable[i].name, &name) == 0){
+            return i;
+        }
+    }
+    error("No index found");
+}
+
+/* removes all symbols associated with the current Depth*/
+void clearOutOfScopeVariable(){
+    for(int i=0; i < currentIndex; i++){
+        if (symbolTable[i].depth == currentDepth){
+            suppressElement(symbolTable[i]);
+        }
+    }
+    error("No index found");
+}
+
+
+/* Toggles the init state of the symbol */
+void toggleInit(char *name){
+    symbolTable[getIndex(&symbolTable, currentIndex, &name)].init = true;
+}
+
+/* Adds an element */
+void addElement(Symbol element){
+
+    //checks for overflow
+    checkArraySanity();
+
+    if (currentIndex == 0){
+        symbolTable[0] = element;
+    } else {
+        symbolTable[currentIndex].name = element.name;
+        symbolTable[currentIndex].init = element.init;
+        symbolTable[currentIndex].varType = element.varType;
+        symbolTable[currentIndex].offset = initOffset(currentIndex -1); // TODO replace with ESP
+        symbolTable[currentIndex].depth = element.depth;
+    }
+
+    //TODO add ESP increment
+
+    currentIndex ++;
+}
+
+
+// TODO replace with ESP
+/* Calcule l'offset à partir de l'offset de l'élément précédent */
+int initOffset(int index){
+    switch (symbolTable[index].varType){
+        case INT:
+            return (symbolTable[index].offset + 1);
+            break;
+        case FLOAT:
+            return (symbolTable[index].offset + 1);
+            break;
+        default:
+            error("Impossible to compute the new offset");
+    }
+}
+
+
+/* Removes an element */
+void suppressElement(Symbol element){
+    for(int i = getIndex(element.name); i < (currentIndex - 1); i ++){
+        symbolTable[i] = symbolTable[i+1];
+    }
+    currentIndex --;
+
+    // checks if there is a need to reduce the size of the array
+    checkArraySanity();
+}
+
+
 /*Checks for the length of the array and reallocates if necessary*/
 void checkArraySanity(){
     if (currentIndex == maxIndex){
@@ -18,90 +119,7 @@ void checkArraySanity(){
     }
 }
 
-/*
-Suppress variable dont la profondeur est plus grande
-add element */
-
-/* a avoir
-tableau, length, esp, indexTab */
-
-/* Fonction d'affichage des erreurs */
-void error(char * mess){
-    printf("ERROR : %s\n", &mess);
-    exit(-1);
-}
-
-
-/* Récupérer l'addresse à partir du nom */
-int getOffset(int esp, char* name, Symbol *tab, int endingIndex){
-    return (esp + getStruct(&tab, endingIndex, &name).offset);
-}
-
-/* Récupérer la structure d'un élement à partir du nom */
-Symbol getStruct(Symbol* tab, int endingIndex, char* name){
-    for(int i=0; i < endingIndex; i++){
-        if (tab[i].name == name){
-            return tab[i];
-        }
-    }
-    error("No structure found");
-}
-
-/* Récupérer l'index d'une valeur dans le tableau*/
-int getIndex(Symbol* tab, int endingIndex, char* name){
-    for(int i=0; i < endingIndex; i++){
-        if (strcmp(tab[i].name, &name) == 0){
-            return i;
-        }
-    }
-    error("No index found");
-}
-
-
-/* Toggle le init */
-void toggleInit(char *name, Symbol *tab, int endingIndex){
-    tab[getIndex(&tab, endingIndex, &name)].init = true;
-}
-
-/* Ajoute un élément */
-void addElement(Symbol *tab, int endingIndex, Symbol element){
-    if (endingIndex == 0){
-        tab[0] = element;
-    }
-    else {
-        tab[endingIndex].name = element.name;
-        tab[endingIndex].init = element.init;
-        tab[endingIndex].varType = element.varType;
-        tab[endingIndex].offset = initOffset(&tab, endingIndex -1);
-        tab[endingIndex].deep = element.deep;
-    }
-    endingIndex ++; // faudra la mettre en variable globale
-}
-
-/* Calcule l'offset à partir de l'offset de l'élément précédent */
-int initOffset(Symbol *tab, int index){
-    int offset = 0;
-    switch (tab[index].varType){
-        case INT:
-            return (tab[index].offset + 1);
-            break;
-        case FLOAT:
-            return (tab[index].offset + 1);
-            break;
-        default:
-            error("Impossible to compute the nexw offset");
-    }
-}
-
-
-/* Supprimer un élément de la table des symboles */
-suppressElement(Symbol *tab, int endingIndex, Symbol element){
-    for(int i = getIndex(&tab, endingIndex, element.name); i < (endingIndex - 1); i ++){
-        tab[i] = tab[i+1];
-    }
-    endingIndex --; // variable globale
-}
-
+/*reallocates the array with the specified size*/
 void reallocateArray(int size){
     Symbol* newSymbolTable = malloc(sizeof (symbol) * size); // we double the size of the array
     Symbol* oldSymbolTable = symbolTable; // we double the size of the array

table.h

@@ -9,19 +9,35 @@ enum enumVarType {INT, FLOAT}; // a adapter
 #define START_TABLE_SIZE 128;
 
 /*indexes in the array*/
-static int currentIndex;
+static int currentIndex; // the next to index to be used
 static int maxIndex;
 static symbol* symbolTable;
 
+// stack pointers
+static int esp;
+static int ebp;
+
+static int currentDepth;
+
 typedef struct {
     char* name;
     bool init;
     enumVarType varType;
     int offset;
-    int deep;
+    int depth;
 } Symbol;
 
+// TODO : move comments here
+
 void reallocateArray(int size);
 void checkArraySanity();
+void suppressElement(Symbol element);
+int initOffset(int index);
+void addElement(Symbol element);
+void toggleInit(char *name);
+int getIndex(char* name);
+Symbol getStruct(char* name);
+void error(char* mess);
+int getOffset(char* name);
 
 #endif