slowly writing a lexer, literally not functional lmao

src/sylt/lexer.c

@@ -0,0 +1,87 @@
+#include "lexer.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio,h>
+
+Lexer initLexer(char *source) {
+	Lexer newLexer = {
+		.source = source,
+		.position = -1,
+		.readPosition = 0,
+		.lineNumber = 1,
+		.currentChar = '\0'
+	};
+	return newLexer;
+}
+
+void readChar(Lexer *lexer) {
+	if (lexer->readPosition >= strlen(lexer->source))
+		lexer->currentChar = '\0';
+	else
+		lexer->currentChar = lexer->source[lexer->readPosition];
+
+	lexer->position = lexer->readPosition;
+	lexer->readPosition++;
+}
+
+void skipWhitespace(Lexer *lexer) {
+	switch (lexer->currentChar)
+	{
+	case ' ':
+	case '\t':
+	case '\n':
+	case '\r':
+		if (lexer->currentChar == '\n')
+			lexer->lineNumber++;		
+
+		readChar(lexer);
+		break;
+	
+	default:
+		break;
+	}
+	
+}
+
+Token nextToken(Lexer *lexer) {
+	//Token tok;
+	skipWhitespace(lexer);
+
+	switch (lexer->currentChar)
+	{
+	case '+':
+		return NEW_TOKEN(lexer, PLUS, "+");
+		break;
+	case '-':
+		return NEW_TOKEN(lexer, MINUS, "-");
+		break;
+	case '*':
+		return NEW_TOKEN(lexer, ASTERISK, "*");
+		break;
+	case '/':
+		return NEW_TOKEN(lexer, SLASH, "/");
+		break;
+	case '%':
+		return NEW_TOKEN(lexer, MODULUS, "%");
+		break;
+	case '^':
+		return NEW_TOKEN(lexer, POW, "^");
+		break;
+	case '(':
+		return NEW_TOKEN(lexer, LPAREN, "(");
+		break;
+	case ')':
+		return NEW_TOKEN(lexer, RPAREN, ")");
+		break;
+	case '\0':
+		return NEW_TOKEN(lexer, EOF, "");
+		break;
+	
+	default:
+		if (isdigit())
+
+		break;
+	}
+
+	//return tok;
+}