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Added a length attribute to the symbol.

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glm94
2022-09-06 14:15:45 +00:00
parent 7004fff659
commit 2518214585
2 changed files with 21 additions and 44 deletions
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includes/parser.h
+1 -1
View File
@@ -12,7 +12,7 @@
typedef struct {
Token* token;
//unsigned char terminatingByte;
int length;
int address;
int resolved;
} Symbol;
src/parser.c
+20 -43
View File
@@ -4,20 +4,14 @@
#include <stdio.h>
#include <stdlib.h>
struct intr {
TokenType struction;
unsigned int parameter1;
unsigned int parameter2;
};
Symbol* CreateSymbol(Token* token, int address, int resolved);
Symbol* CreateSymbol(Token* token, int length, int address, int resolved);
const List* TokensList;
int CurrentToken = 0;
//int HeapStart = 4; // zero indexed, used for declared variables.
//int BinaryEnd = 4; // Zero indexed (binary starts with a 4 byte header)
IROpcode* CreateIROpcode(TokenType mnemonic);
Symbol* AddSymbol(Token* token, int address, int resolved);
Symbol* AddSymbol(Token* token, int length, int address, int resolved);
void PrintSymbols(void);
void HandleOperation(void);
void HandleAssemblerDirective(void);
@@ -25,7 +19,6 @@ void AdvanceParser(void);
Token* PeekToken(void);
int ParserAtEnd(void);
int Expect(int, ...);
int ExpectTokenClass(int, ...);
Symbol* GetSymbol(char*);
//List* SymbolsTable;
unsigned int HeapTop = 4;
@@ -58,7 +51,7 @@ IRState* ParseTokens(List* tokens) {
case Address:
if (t->type == LABEL) {
printf("%s: \n", t->lexeme);
AddSymbol(t, ProgramCounter, 1);
AddSymbol(t, 2, ProgramCounter, 1);
}
break;
default:
@@ -73,7 +66,7 @@ IRState* ParseTokens(List* tokens) {
//DestroyList(SymbolsTable);
//memcpy(&Heap[HeapTop], Memory, ProgramCounter);
int totalSize = HeapTop + ProgramCounter;
//int totalSize = HeapTop + ProgramCounter;
// Heap[0] = 2 >> HeapTop & 0xFF;
// Heap[1] = HeapTop & 0xFF;
// Heap[2] = 2 >> totalSize & 0xFF;
@@ -102,7 +95,7 @@ void HandleAssemblerDirective(void) {
exit(1);
}
Symbol* symbol = AddSymbol(identifier, HeapTop, 1);
Symbol* symbol = AddSymbol(identifier, 0, HeapTop, 1);
identifier = PeekToken();
@@ -117,6 +110,7 @@ void HandleAssemblerDirective(void) {
//ProgramCounter += strlen(PeekToken()->lexeme);
HeapTop += strlen(identifier->lexeme);
symbol->length = strlen(identifier->lexeme);
AdvanceParser();
@@ -129,10 +123,11 @@ void HandleAssemblerDirective(void) {
}
else {
//Hideous...
int oldLength = strlen(identifier->lexeme);
identifier->lexeme = realloc(identifier->lexeme, oldLength + 2);
identifier->value = identifier->lexeme;
identifier->lexeme[oldLength + 1] = '\0';//*PeekToken()->lexeme & 0x0F;
// int oldLength = strlen(identifier->lexeme);
// identifier->lexeme = realloc(identifier->lexeme, oldLength + 2);
// identifier->value = identifier->lexeme;
// identifier->lexeme[oldLength + 1] = '\0';//*PeekToken()->lexeme & 0x0F;
symbol->length++; //Basically, read in the NULL byte at the end of the string.
HeapTop++;
return;
}
@@ -169,7 +164,7 @@ void HandleRegisterBasedOpcode(unsigned char mask) {
Symbol* symbol = GetSymbol(token->lexeme);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(token, 0, 0);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(token, 2, 0, 0);
else opcode->ParameterOne.Address = symbol;//CreateSymbol(token, symbol->address, symbol->resolved);
}
else {
@@ -194,7 +189,7 @@ void HandleRegisterBasedOpcode(unsigned char mask) {
// fprintf(stderr, "[Error] Line %d: %s is undefined.\n", token->line, token->lexeme);
// exit(1);
// }
if (!symbol) opcode->ParameterOne.Address = AddSymbol(token, 0, 0);//CreateSymbol(token, 0, 0);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(token, 2, 0, 0);//CreateSymbol(token, 0, 0);
else opcode->ParameterOne.Address = symbol;//CreateSymbol(token, symbol->address, symbol->resolved);
// Memory[ProgramCounter - 1] |= 0x10;//0b00010000;
@@ -274,7 +269,7 @@ void HandleOperation(void) {
Symbol* symbol = GetSymbol(PeekToken()->lexeme);
opcode->ParameterOneType = Address;
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 0, 0);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 2, 0, 0);
else opcode->ParameterOne.Address = symbol;
// if (!symbol) {
// fprintf(stderr, "[Error] %s is undefined.\n", PeekToken()->lexeme);
@@ -346,7 +341,7 @@ void HandleOperation(void) {
// fprintf(stderr, "[Error] Line %d: %s is undefined.\n", PeekToken()->line, PeekToken()->lexeme);
// exit(1);
// }
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 0, 0);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 2, 0, 0);
else opcode->ParameterOne.Address = symbol;
//Memory[ProgramCounter] = 2 >> symbol->address & 0xFF;
//Memory[ProgramCounter + 1] = symbol->address & 0xFF;
@@ -371,7 +366,7 @@ void HandleOperation(void) {
// fprintf(stderr, "[Error] Line %d: %s is undefined.\n", PeekToken()->line, PeekToken()->lexeme);
// exit(1);
// }
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 0, 0);
if (!symbol) opcode->ParameterOne.Address = AddSymbol(PeekToken(), 2, 0, 0);
else opcode->ParameterOne.Address = symbol;
// Memory[ProgramCounter] = 2 >> symbol->address & 0xFF;
@@ -431,25 +426,6 @@ void HandleOperation(void) {
return;
}
int ExpectTokenClass(int count, ...) {
va_list list;
Token* token = PeekToken();
va_start(list, count);
for(int i = 0; i < count; i++) {
if (va_arg(list, TokenClass) == token->token_class) {
va_end(list);
AdvanceParser();
return 1;
}
}
va_end(list);
return 0;
}
int Expect(int count, ...) {
va_list list;
Token* token = PeekToken();
@@ -478,7 +454,7 @@ void PrintSymbols(void) {
printf("-----SYMBOLS-----\n");
}
Symbol* AddSymbol(Token* token, int address, int resolved) {
Symbol* AddSymbol(Token* token, int length, int address, int resolved) {
if (!token) return NULL;
if (token->type != IDENTIFIER && token->type != LABEL) return NULL;
@@ -492,11 +468,12 @@ Symbol* AddSymbol(Token* token, int address, int resolved) {
}
s->resolved = resolved;
s->address = address;
s->length = length;
return s;
}
}
Symbol* symbol = CreateSymbol(token, address, resolved);
Symbol* symbol = CreateSymbol(token, length, address, resolved);
AddListItem(symbol, sizeof(Symbol), MachineState.SymbolsTable);
@@ -515,7 +492,7 @@ Symbol* GetSymbol(char* name) {
return NULL;
}
Symbol* CreateSymbol(Token* token, int address, int resolved) {
Symbol* CreateSymbol(Token* token, int length, int address, int resolved) {
Symbol* symbol = calloc(1, sizeof(Symbol));
if (!symbol) return NULL;