Wrote a basic lexer

source/debug.c

@@ -0,0 +1,103 @@
+#include "debug.h"
+
+#include "keyword_types.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void printToken(Token* token) {
+	if (token->type == TOKEN_ERROR) {
+		printf("Error\t%d\t%.*s\n", token->line, token->length, token->lexeme);
+		return;
+	}
+
+	printf("\t%d\t%d\t", token->type, token->line);
+
+	if (token->type == TOKEN_IDENTIFIER || token->type == TOKEN_LITERAL_INTEGER || token->type == TOKEN_LITERAL_FLOAT || token->type == TOKEN_LITERAL_STRING) {
+		printf("%.*s\t", token->length, token->lexeme);
+	} else {
+		char* keyword = findKeywordByType(token->type);
+
+		if (keyword != NULL) {
+			printf("%s", keyword);
+		} else {
+			printf("-");
+		}
+	}
+
+	printf("\n");
+}
+
+//declare the singleton
+Command command;
+
+void initCommand(int argc, const char* argv[]) {
+	//default values
+	command.error = false;
+	command.help = false;
+	command.version = false;
+	command.filename = NULL;
+	command.source = NULL;
+	command.verbose = false;
+
+	for (int i = 1; i < argc; i++) { //start at 1 to skip the program name
+		if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
+			command.help = true;
+			continue;
+		}
+
+		if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--version")) {
+			command.version = true;
+			continue;
+		}
+
+		if ((!strcmp(argv[i], "-f") || !strcmp(argv[i], "--file")) && i + 1 < argc) {
+			command.filename = (char*)argv[i + 1];
+			i++;
+			continue;
+		}
+
+		if ((!strcmp(argv[i], "-i") || !strcmp(argv[i], "--input")) && i + 1 < argc) {
+			command.source = (char*)argv[i + 1];
+			i++;
+			continue;
+		}
+
+		if (!strcmp(argv[i], "-d") || !strcmp(argv[i], "--debug")) {
+			command.verbose = true;
+			continue;
+		}
+
+		command.error = true;
+	}
+
+	//no arguments
+	if (argc == 1) {
+		command.error = true;
+	}
+}
+
+void usageCommand(int argc, const char* argv[]) {
+	printf("Usage: %s [-h | -v | [-d][-f filename | -i source]]\n\n", argv[0]);
+}
+
+void helpCommand(int argc, const char* argv[]) {
+	usageCommand(argc, argv);
+
+	printf("-h | --help\t\tShow this help then exit.\n");
+	printf("-v | --version\t\tShow version and copyright information then exit.\n");
+	printf("-f | --file filename\tParse and execute the source file.\n");
+	printf("-i | --input source\tParse and execute this given string of source code.\n");
+	printf("-d | --debug\t\tBe verbose when operating.\n");
+}
+
+void copyrightCommand(int argc, const char* argv[]) {
+	printf("Toy Programming Language Interpreter Version %d.%d.%d (built on %s)\n\n", TOY_VERSION_MAJOR, TOY_VERSION_MINOR, TOY_VERSION_PATCH, TOY_VERSION_BUILD);
+	printf("Copyright (c) 2020-2022 Kayne Ruse, KR Game Studios\n\n");
+	printf("This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.\n\n");
+	printf("Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:\n\n");
+	printf("1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.\n\n");
+	printf("2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.\n\n");
+	printf("3. This notice may not be removed or altered from any source distribution.\n\n");
+}