feat: add code style rules

.clang-format

@@ -0,0 +1,7 @@
+---
+Language: Cpp
+BasedOnStyle: LLVM
+BreakBeforeBraces: Allman
+IndentWidth: 2
+TabWidth: 2
+UseTab: Never

.gitignore

@@ -6,6 +6,7 @@
 !/src
 
 # Files
+!/.clang-format
 !/.gitignore
 !/CMakeLists.txt
 !/Makefile

include/compiler/fzl_debug.h

@@ -6,5 +6,4 @@
 // Print AST
 void fzl_debug_print_ast(fzl_node_t *root);
 
-#endif//FZL_DEBUG_H
-
+#endif // FZL_DEBUG_H

include/compiler/fzl_parser.h

@@ -1,39 +1,44 @@
 #ifndef FZL_PARSER_H
 #define FZL_PARSER_H
 
-#include <stddef.h>
-#include <compiler/fzl_token.h>
 #include <compiler/fzl_reader.h>
+#include <compiler/fzl_token.h>
+#include <stddef.h>
 
 // AST node type
-typedef enum {
-	FZL_NODETYPE_BLOCK,
-	FZL_NODETYPE_CALL,
-	FZL_NODETYPE_LITERAL,
+typedef enum
+{
+  FZL_NODETYPE_BLOCK,
+  FZL_NODETYPE_CALL,
+  FZL_NODETYPE_LITERAL,
 } fzl_nodetype_t;
 
 // AST node descriptor
-typedef struct fzl_node {
-	fzl_nodetype_t type;
-	fzl_token_t *token;
-	struct fzl_node *parent;
-	struct fzl_node *next;
+typedef struct fzl_node
+{
+  fzl_nodetype_t type;
+  fzl_token_t *token;
+  struct fzl_node *parent;
+  struct fzl_node *next;
 
-	union {
-		struct {
-			struct fzl_node **entries;
-			size_t entry_count;
-		} list;
-	};
+  union
+  {
+    struct
+    {
+      struct fzl_node **entries;
+      size_t entry_count;
+    } list;
+  };
 } fzl_node_t;
 
 // Token sequence parser descriptor
-typedef struct {
-	fzl_reader_ll_t *first;
-	size_t token_count;
+typedef struct
+{
+  fzl_reader_ll_t *first;
+  size_t token_count;
 
-	fzl_reader_ll_t *cursor;
-	fzl_node_t *root;
+  fzl_reader_ll_t *cursor;
+  fzl_node_t *root;
 } fzl_parser_t;
 
 // Allocate parser
@@ -49,10 +54,9 @@ int fzl_parse(fzl_parser_t *parser);
 char *fzl_parser_geterror();
 
 // Free node
-void fzl_freenode(fzl_node_t* node);
+void fzl_freenode(fzl_node_t *node);
 
 // Free parser
 void fzl_freeparser(fzl_parser_t *parser);
 
-#endif//FZL_PARSER_H
-
+#endif // FZL_PARSER_H

include/compiler/fzl_reader.h

@@ -1,25 +1,27 @@
 #ifndef FZL_READER_H
 #define FZL_READER_H
 
-#include <stdint.h>
-#include <stddef.h>
-#include <stdbool.h>
 #include <compiler/fzl_token.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
 
 // Tokens linked list descriptor
-typedef struct fzl_reader_ll {
-	fzl_token_t *token;
-	struct fzl_reader_ll *next;
+typedef struct fzl_reader_ll
+{
+  fzl_token_t *token;
+  struct fzl_reader_ll *next;
 } fzl_reader_ll_t;
 
 // Source reader description
-typedef struct {
-	fzl_reader_ll_t *first;
-	fzl_reader_ll_t *last;
+typedef struct
+{
+  fzl_reader_ll_t *first;
+  fzl_reader_ll_t *last;
 
-	char *source;
-	size_t position;
-	bool at_end;
+  char *source;
+  size_t position;
+  bool at_end;
 } fzl_reader_t;
 
 // Allocate new reader
@@ -34,5 +36,4 @@ char *fzl_reader_geterror();
 // Free reader
 void fzl_freereader(fzl_reader_t *reader);
 
-#endif//FZL_READER_H
-
+#endif // FZL_READER_H

include/compiler/fzl_token.h

@@ -1,36 +1,36 @@
 #ifndef FZL_TOKEN_H
 #define FZL_TOKEN_H
 
-#include <stdint.h>
-#include <stddef.h>
 #include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
 
 // Token type
-typedef enum {
-	FZL_TOKTYPE_NAME,
-	FZL_TOKTYPE_LPAIR,
-	FZL_TOKTYPE_RPAIR,
-	FZL_TOKTYPE_COMMA,
-	FZL_TOKTYPE_STR_LITERAL
+typedef enum
+{
+  FZL_TOKTYPE_NAME,
+  FZL_TOKTYPE_LPAIR,
+  FZL_TOKTYPE_RPAIR,
+  FZL_TOKTYPE_COMMA,
+  FZL_TOKTYPE_STR_LITERAL
 } fzl_toktype_t;
 
 // Token descriptor
-typedef struct {
-	fzl_toktype_t type;
-	uint16_t i0;
-	uint16_t i1;
-	bool store_value;
-	void *value;
-	uint16_t value_sz;
+typedef struct
+{
+  fzl_toktype_t type;
+  uint16_t i0;
+  uint16_t i1;
+  bool store_value;
+  void *value;
+  uint16_t value_sz;
 } fzl_token_t;
 
 // Allocate new token
-fzl_token_t *fzl_mktoken(
-	const fzl_toktype_t type, uint16_t from, uint16_t to,
-	void *value, size_t value_sz);
+fzl_token_t *fzl_mktoken(const fzl_toktype_t type, uint16_t from, uint16_t to,
+                         void *value, size_t value_sz);
 
 // Free token and its contents
 void fzl_freetoken(fzl_token_t *token);
 
-#endif//FZL_TOKEN_H
-
+#endif // FZL_TOKEN_H

src/compiler/fzl_debug.c

@@ -1,82 +1,83 @@
 #include <compiler/fzl_debug.h>
-#include <stdio.h>
 #include <stddef.h>
+#include <stdio.h>
 #include <string.h>
 
 size_t print_level(char *buf, int level)
 {
-	int lvl = 0;
-	while (lvl < level)
-	{
-		buf[lvl] = '-';
-		lvl++;
-	}
+  int lvl = 0;
+  while (lvl < level)
+  {
+    buf[lvl] = '-';
+    lvl++;
+  }
 
-	buf[lvl] = '>';
-	return strlen(buf);
+  buf[lvl] = '>';
+  return strlen(buf);
 }
 
 void print_node(fzl_node_t *node, int level)
 {
-	char levelbuf[32];
-	char printbuf[256];
-	memset(levelbuf, 0, sizeof(levelbuf));
-	memset(printbuf, 0, sizeof(printbuf));
+  char levelbuf[32];
+  char printbuf[256];
+  memset(levelbuf, 0, sizeof(levelbuf));
+  memset(printbuf, 0, sizeof(printbuf));
 
-	if (!node) return;
-	
-	size_t lvllen = print_level(levelbuf, level);
-	strcpy(printbuf, levelbuf);
+  if (!node)
+    return;
 
-	switch (node->type)
-	{
-		case FZL_NODETYPE_CALL:
-			if (node->list.entry_count > 0)
-			{
-				printf("%s Call fn '%s' with args:\n", levelbuf, (char*)node->token->value);
-				for (size_t i = 0; i < node->list.entry_count; i++)
-					print_node(node->list.entries[i], level + 1);
-			}
-			else printf("%s Call fn '%s' w/o args\n", levelbuf, (char*)node->token->value);
-			break;
+  size_t lvllen = print_level(levelbuf, level);
+  strcpy(printbuf, levelbuf);
 
-		case FZL_NODETYPE_LITERAL:
-			printf("%s Literal '%s'\n",
-						 levelbuf,
-						 (char*)node->token->value);
-			break;
+  switch (node->type)
+  {
+  case FZL_NODETYPE_CALL:
+    if (node->list.entry_count > 0)
+    {
+      printf("%s Call fn '%s' with args:\n", levelbuf,
+             (char *)node->token->value);
+      for (size_t i = 0; i < node->list.entry_count; i++)
+        print_node(node->list.entries[i], level + 1);
+    }
+    else
+      printf("%s Call fn '%s' w/o args\n", levelbuf,
+             (char *)node->token->value);
+    break;
 
-		case FZL_NODETYPE_BLOCK:
-			printf("%s Block: ", levelbuf);
+  case FZL_NODETYPE_LITERAL:
+    printf("%s Literal '%s'\n", levelbuf, (char *)node->token->value);
+    break;
 
-			if (node->list.entry_count < 1)
-			{
-				printf("<empty>\n");
-				break;
-			}
-			
-			printf("\n");
-			for (size_t i = 0; i < node->list.entry_count; i++)
-				print_node(node->list.entries[i], level + 1);
+  case FZL_NODETYPE_BLOCK:
+    printf("%s Block: ", levelbuf);
 
-			break;
+    if (node->list.entry_count < 1)
+    {
+      printf("<empty>\n");
+      break;
+    }
 
-		default:
-			printf("%s Secure node\n", levelbuf);
-	}
+    printf("\n");
+    for (size_t i = 0; i < node->list.entry_count; i++)
+      print_node(node->list.entries[i], level + 1);
+
+    break;
+
+  default:
+    printf("%s Secure node\n", levelbuf);
+  }
 }
 
 void fzl_debug_print_ast(fzl_node_t *root)
 {
-	printf("> AST tree:\n");
+  printf("> AST tree:\n");
 
-	fzl_node_t *curr = root;
-	while (curr != NULL)
-	{
-		print_node(curr, 2);
-		curr = curr->next;
-	}
+  fzl_node_t *curr = root;
+  while (curr != NULL)
+  {
+    print_node(curr, 2);
+    curr = curr->next;
+  }
 
-	printf("-> FINISH\n");
+  printf("-> FINISH\n");
 }
-

src/compiler/fzl_parser.c

@@ -1,25 +1,27 @@
 #include <compiler/fzl_parser.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 char last_err[256];
 
 fzl_parser_t *fzl_mkparser(fzl_reader_ll_t *first)
 {
-	if (!first)
-	{
-		snprintf(last_err, sizeof(last_err), "token is null");
-		return NULL;
-	}
+  if (!first)
+  {
+    snprintf(last_err, sizeof(last_err), "token is null");
+    return NULL;
+  }
 
-	fzl_parser_t *parser = malloc(sizeof(fzl_parser_t));
-	if (!parser) return NULL;
+  fzl_parser_t *parser = malloc(sizeof(fzl_parser_t));
+  if (!parser)
+    return NULL;
 
-	parser->root = NULL;
-	parser->cursor = first->next;
-	if (!parser->cursor) return NULL;
+  parser->root = NULL;
+  parser->cursor = first->next;
+  if (!parser->cursor)
+    return NULL;
 
-	return parser;
+  return parser;
 }
 
 // --- Parse zone ---
@@ -27,56 +29,61 @@ fzl_parser_t *fzl_mkparser(fzl_reader_ll_t *first)
 // Make a new node
 fzl_node_t *fzl_mknode(fzl_nodetype_t type, fzl_token_t *token)
 {
-	fzl_node_t *node = malloc(sizeof(fzl_node_t));
+  fzl_node_t *node = malloc(sizeof(fzl_node_t));
 
-	if (!node) return NULL;
-	node->type = type;
-	node->token = token;
-	node->parent = NULL;
-	node->next = NULL;
+  if (!node)
+    return NULL;
+  node->type = type;
+  node->token = token;
+  node->parent = NULL;
+  node->next = NULL;
 
-	return node;
+  return node;
 }
 
 // Get token at cursor
 static fzl_token_t *peek(fzl_parser_t *parser)
 {
-	if (!parser->cursor) return NULL;
-	return parser->cursor->token;
+  if (!parser->cursor)
+    return NULL;
+  return parser->cursor->token;
 }
 
 // Get token at (cursor + 1)
 static fzl_token_t *next(fzl_parser_t *parser)
 {
-	if (!parser->cursor) return NULL;
-	
-	fzl_reader_ll_t *next = parser->cursor->next;
-	if (!next) return NULL;
+  if (!parser->cursor)
+    return NULL;
 
-	return next->token;
+  fzl_reader_ll_t *next = parser->cursor->next;
+  if (!next)
+    return NULL;
+
+  return next->token;
 }
 
 // Consume token at cursor and move to the next
 static fzl_token_t *consume(fzl_parser_t *parser)
 {
-	if (!parser->cursor) return NULL;
-	fzl_token_t *tok = parser->cursor->token;
-	parser->cursor = parser->cursor->next;
-	return tok;
+  if (!parser->cursor)
+    return NULL;
+  fzl_token_t *tok = parser->cursor->token;
+  parser->cursor = parser->cursor->next;
+  return tok;
 }
 
 // Parse primary
 fzl_node_t *parse_primary(fzl_parser_t *parser)
 {
-	if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_STR_LITERAL)
-	{
-		fzl_token_t *tok = consume(parser);
-		return fzl_mknode(FZL_NODETYPE_LITERAL, tok);
-	}
+  if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_STR_LITERAL)
+  {
+    fzl_token_t *tok = consume(parser);
+    return fzl_mknode(FZL_NODETYPE_LITERAL, tok);
+  }
 
-	snprintf(last_err, sizeof(last_err),
-					 "failed to parse primary at %d", peek(parser)->i0);
-	return NULL;
+  snprintf(last_err, sizeof(last_err), "failed to parse primary at %d",
+           peek(parser)->i0);
+  return NULL;
 }
 
 fzl_node_t *parse_expression(fzl_parser_t *parser, int precedence);
@@ -84,131 +91,133 @@ fzl_node_t *parse_expression(fzl_parser_t *parser, int precedence);
 // Parse call expression
 fzl_node_t *parse_call(fzl_parser_t *parser)
 {
-	fzl_token_t *tok = consume(parser); // <NAME>
-	consume(parser); // (
-	
-	fzl_node_t *node = fzl_mknode(FZL_NODETYPE_CALL, tok);
-	node->list.entry_count = 0;
+  fzl_token_t *tok = consume(parser); // <NAME>
+  consume(parser);                    // (
 
-	size_t capacity = 4;
-	node->list.entries = malloc(capacity * sizeof(fzl_node_t*));
-	node->list.entry_count = 0;
+  fzl_node_t *node = fzl_mknode(FZL_NODETYPE_CALL, tok);
+  node->list.entry_count = 0;
 
-	if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_RPAIR)
-	{
-		consume(parser);
-		return node;
-	}
+  size_t capacity = 4;
+  node->list.entries = malloc(capacity * sizeof(fzl_node_t *));
+  node->list.entry_count = 0;
 
-	while (peek(parser) && peek(parser)->type != FZL_TOKTYPE_RPAIR)
-	{
-		fzl_node_t *arg = parse_expression(parser, 0);
-		if (!arg) return NULL;
+  if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_RPAIR)
+  {
+    consume(parser);
+    return node;
+  }
 
-		if (node->list.entry_count == capacity)
-		{
-			capacity *= 2;
-			node->list.entries = realloc(node->list.entries, capacity * sizeof(fzl_node_t*));
-		}
+  while (peek(parser) && peek(parser)->type != FZL_TOKTYPE_RPAIR)
+  {
+    fzl_node_t *arg = parse_expression(parser, 0);
+    if (!arg)
+      return NULL;
 
-		node->list.entries[node->list.entry_count++] = arg;
+    if (node->list.entry_count == capacity)
+    {
+      capacity *= 2;
+      node->list.entries =
+          realloc(node->list.entries, capacity * sizeof(fzl_node_t *));
+    }
 
-		if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_COMMA)
-			consume(parser);
-		else if (peek(parser) && peek(parser)->type != FZL_TOKTYPE_RPAIR)
-		{
-			snprintf(last_err, sizeof(last_err), "expected ',' or ')' after arg list");
-			return NULL;
-		}
-	}
+    node->list.entries[node->list.entry_count++] = arg;
 
-	consume(parser);
-	return node;
+    if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_COMMA)
+      consume(parser);
+    else if (peek(parser) && peek(parser)->type != FZL_TOKTYPE_RPAIR)
+    {
+      snprintf(last_err, sizeof(last_err),
+               "expected ',' or ')' after arg list");
+      return NULL;
+    }
+  }
+
+  consume(parser);
+  return node;
 }
 
 // Expression parsing
 fzl_node_t *parse_expression(fzl_parser_t *parser, int precedence)
 {
-	if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_NAME)
-	{
-		if (next(parser) && next(parser)->type == FZL_TOKTYPE_LPAIR)
-			return parse_call(parser);
-	}
-	else if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_STR_LITERAL)
-		return parse_primary(parser);
+  if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_NAME)
+  {
+    if (next(parser) && next(parser)->type == FZL_TOKTYPE_LPAIR)
+      return parse_call(parser);
+  }
+  else if (peek(parser) && peek(parser)->type == FZL_TOKTYPE_STR_LITERAL)
+    return parse_primary(parser);
 
-	snprintf(last_err, sizeof(last_err),
-					 "failed to parse expression at %d",
-					 peek(parser)->i0);
-	return NULL;
+  snprintf(last_err, sizeof(last_err), "failed to parse expression at %d",
+           peek(parser)->i0);
+  return NULL;
 }
 
 // Statement parsing
 fzl_node_t *parse_statement(fzl_parser_t *parser)
 {
-	return parse_expression(parser, 0);
+  return parse_expression(parser, 0);
 }
 
 // Internal parsing entry point
 fzl_node_t *parse_program(fzl_parser_t *parser)
 {
-	fzl_node_t *first = NULL;
-	fzl_node_t *last = NULL;
-	fzl_node_t *node = NULL;
-	while (peek(parser) != NULL)
-	{
-		node = parse_statement(parser);
-		if (!node) return NULL;
+  fzl_node_t *first = NULL;
+  fzl_node_t *last = NULL;
+  fzl_node_t *node = NULL;
+  while (peek(parser) != NULL)
+  {
+    node = parse_statement(parser);
+    if (!node)
+      return NULL;
 
-		if (!last)
-		{
-			first = node;
-			last = node;
-		}
-		else
-		{
-			last->next = node;
-			last = node;
-		}
-	}
+    if (!last)
+    {
+      first = node;
+      last = node;
+    }
+    else
+    {
+      last->next = node;
+      last = node;
+    }
+  }
 
-	if (!first)
-	{
-		snprintf(last_err, sizeof(last_err), "empty ;(");
-		return NULL;
-	}
+  if (!first)
+  {
+    snprintf(last_err, sizeof(last_err), "empty ;(");
+    return NULL;
+  }
 
-	return first;
+  return first;
 }
 
-
 // Parse tokens and build AST
 int fzl_parse(fzl_parser_t *parser)
 {
-	fzl_node_t *ast = parse_program(parser);
-	if (!ast) return -1;
+  fzl_node_t *ast = parse_program(parser);
+  if (!ast)
+    return -1;
 
-	parser->root = ast;
-	return 0;
+  parser->root = ast;
+  return 0;
 }
 
 // --- Parse zone end ---
 
-char *fzl_parser_geterror()
-{
-	return last_err;
-}
+char *fzl_parser_geterror() { return last_err; }
 
 void fzl_freenode(fzl_node_t *node)
 {
-	if (!node) return;
-	if (node->token) fzl_freetoken(node->token);
-	free(node);
+  if (!node)
+    return;
+  if (node->token)
+    fzl_freetoken(node->token);
+  free(node);
 }
 
 void fzl_freeparser(fzl_parser_t *parser)
 {
-	if (!parser) return;
-	free(parser);
+  if (!parser)
+    return;
+  free(parser);
 }
-

src/compiler/fzl_reader.c

@@ -8,18 +8,18 @@ static char last_err[256] = {0};
 
 fzl_reader_t *fzl_mkreader(char *source)
 {
-	fzl_reader_ll_t *first_node = malloc(sizeof(fzl_reader_ll_t));
-	first_node->token = NULL;
-	first_node->next = NULL;
+  fzl_reader_ll_t *first_node = malloc(sizeof(fzl_reader_ll_t));
+  first_node->token = NULL;
+  first_node->next = NULL;
 
-	fzl_reader_t *reader = malloc(sizeof(fzl_reader_t));
-	reader->first = first_node;
-	reader->last = first_node;
-	reader->source = source;
-	reader->position = 0;
-	reader->at_end = true;
+  fzl_reader_t *reader = malloc(sizeof(fzl_reader_t));
+  reader->first = first_node;
+  reader->last = first_node;
+  reader->source = source;
+  reader->position = 0;
+  reader->at_end = true;
 
-	return reader;
+  return reader;
 }
 
 // --- Read zone ---
@@ -27,176 +27,157 @@ fzl_reader_t *fzl_mkreader(char *source)
 // Try parse name
 fzl_token_t *parse_name(fzl_reader_t *reader)
 {
-	size_t lpos = reader->position;
-	size_t size = 0;
+  size_t lpos = reader->position;
+  size_t size = 0;
 
-	do
-	{
-		lpos++;
-		size++;
-	}
-	while ((reader->source[lpos] >= 'A' && reader->source[lpos] <= 'Z')
-			|| (reader->source[lpos] >= 'a' && reader->source[lpos] <= 'z'));
+  do
+  {
+    lpos++;
+    size++;
+  } while ((reader->source[lpos] >= 'A' && reader->source[lpos] <= 'Z') ||
+           (reader->source[lpos] >= 'a' && reader->source[lpos] <= 'z'));
 
-	char *value = malloc(size);
-	memcpy(value, reader->source + reader->position, size);
+  char *value = malloc(size);
+  memcpy(value, reader->source + reader->position, size);
 
-	size_t start = reader->position;
-	reader->position += size;
+  size_t start = reader->position;
+  reader->position += size;
 
-	fzl_token_t *tok = fzl_mktoken(
-		FZL_TOKTYPE_NAME,
-		start,
-		reader->position - 1,
-		value,
-		size
-	);
-	free(value);
+  fzl_token_t *tok =
+      fzl_mktoken(FZL_TOKTYPE_NAME, start, reader->position - 1, value, size);
+  free(value);
 
-	return tok;
+  return tok;
 }
 
 // Try parse string literal
 fzl_token_t *parse_string_literal(fzl_reader_t *reader)
 {
-	size_t lpos = reader->position;
-	size_t size = 0;
+  size_t lpos = reader->position;
+  size_t size = 0;
 
-	if (reader->source[lpos] != '\'' && reader->source[lpos] != '"')
-		return NULL;
+  if (reader->source[lpos] != '\'' && reader->source[lpos] != '"')
+    return NULL;
 
-	char open_symbol = reader->source[lpos];
+  char open_symbol = reader->source[lpos];
 
-	do
-	{
-		lpos++;
-		size++;
-	}
-	while (reader->source[lpos] != open_symbol);
-	size++;
+  do
+  {
+    lpos++;
+    size++;
+  } while (reader->source[lpos] != open_symbol);
+  size++;
 
-	if (size == 2)
-	{
-		fzl_token_t *tok = fzl_mktoken(
-			FZL_TOKTYPE_STR_LITERAL,
-			reader->position,
-			reader->position + 1,
-			"",
-			0
-		);
-		return tok;
-	}
+  if (size == 2)
+  {
+    fzl_token_t *tok = fzl_mktoken(FZL_TOKTYPE_STR_LITERAL, reader->position,
+                                   reader->position + 1, "", 0);
+    return tok;
+  }
 
-	char *value = malloc(size - 2);
-	memcpy(value, reader->source + reader->position + 1, size - 2);
-	fzl_token_t *tok = fzl_mktoken(
-		FZL_TOKTYPE_STR_LITERAL,
-		reader->position,
-		lpos,
-		value,
-		size - 2
-	);
-	free(value);
+  char *value = malloc(size - 2);
+  memcpy(value, reader->source + reader->position + 1, size - 2);
+  fzl_token_t *tok = fzl_mktoken(FZL_TOKTYPE_STR_LITERAL, reader->position,
+                                 lpos, value, size - 2);
+  free(value);
 
-	reader->position += size;
+  reader->position += size;
 
-	return tok;
+  return tok;
 }
 
 int fzl_read(fzl_reader_t *reader)
 {
-	const size_t len = strlen(reader->source);
-	if (reader->position >= len) return 0;
-	
-	do {
-		size_t p = reader->position;
-		fzl_token_t *token;
-		char curr = reader->source[p];
+  const size_t len = strlen(reader->source);
+  if (reader->position >= len)
+    return 0;
 
-		if (curr == '\n' || curr == ' ' || curr == '\r')
-		{
-			reader->position++;
-			continue;
-		}
+  do
+  {
+    size_t p = reader->position;
+    fzl_token_t *token;
+    char curr = reader->source[p];
 
-		if (curr == '\'' || curr == '"')
-			token = parse_string_literal(reader);
-		else if (curr == '(')
-		{
-			token = fzl_mktoken(
-				FZL_TOKTYPE_LPAIR,
-				p, p, NULL, 0);
-			reader->position++;
-		}
-		else if (curr == ')')
-		{
-			token = fzl_mktoken(
-				FZL_TOKTYPE_RPAIR,
-				p, p, NULL, 0);
-			reader->position++;
-		}
-		else if (curr >= 'A' && curr <= 'Z' ||
-						 curr >= 'a' && curr <= 'z')
-			token = parse_name(reader);
-		else
-		{
-			sprintf(last_err, "undefined token '%c'", curr);
-			return -1;
-		}
+    if (curr == '\n' || curr == ' ' || curr == '\r')
+    {
+      reader->position++;
+      continue;
+    }
 
-		if (!token)
-		{
-			size_t line = 1, linepos = 1;
-			for (size_t i = 0; i < p; i++)
-			{
-				char sym = reader->source[i];
-				if (sym == '\n')
-				{
-					linepos = 1;
-					line++;
-				} else linepos++;
-			}
+    if (curr == '\'' || curr == '"')
+      token = parse_string_literal(reader);
+    else if (curr == '(')
+    {
+      token = fzl_mktoken(FZL_TOKTYPE_LPAIR, p, p, NULL, 0);
+      reader->position++;
+    }
+    else if (curr == ')')
+    {
+      token = fzl_mktoken(FZL_TOKTYPE_RPAIR, p, p, NULL, 0);
+      reader->position++;
+    }
+    else if (curr >= 'A' && curr <= 'Z' || curr >= 'a' && curr <= 'z')
+      token = parse_name(reader);
+    else
+    {
+      sprintf(last_err, "undefined token '%c'", curr);
+      return -1;
+    }
 
-			sprintf(last_err, "error parsing token (position %ld of line %ld)", line, linepos);
-			return -1;
-		}
+    if (!token)
+    {
+      size_t line = 1, linepos = 1;
+      for (size_t i = 0; i < p; i++)
+      {
+        char sym = reader->source[i];
+        if (sym == '\n')
+        {
+          linepos = 1;
+          line++;
+        }
+        else
+          linepos++;
+      }
 
-		fzl_reader_ll_t *tok_node = malloc(sizeof(fzl_reader_ll_t));
-		tok_node->token = token;
-		
-		reader->last->next = tok_node;
-		reader->last = tok_node;
-	} while (reader->position < len);
+      sprintf(last_err, "error parsing token (position %ld of line %ld)", line,
+              linepos);
+      return -1;
+    }
 
-	reader->at_end = true;
-	return 0;
+    fzl_reader_ll_t *tok_node = malloc(sizeof(fzl_reader_ll_t));
+    tok_node->token = token;
+
+    reader->last->next = tok_node;
+    reader->last = tok_node;
+  } while (reader->position < len);
+
+  reader->at_end = true;
+  return 0;
 }
 
 // --- Read zone end ---
 
-char *fzl_reader_geterror()
-{
-	return last_err;
-}
+char *fzl_reader_geterror() { return last_err; }
 
 void free_node_and_next(fzl_reader_ll_t *node)
 {
-	if (!node) return;
-	if (node->next)
-		free_node_and_next(node->next);
-	
-	if (node->token)
-		fzl_freetoken(node->token);
+  if (!node)
+    return;
+  if (node->next)
+    free_node_and_next(node->next);
 
-	free(node);
+  if (node->token)
+    fzl_freetoken(node->token);
+
+  free(node);
 }
 
 void fzl_freereader(fzl_reader_t *reader)
 {
-	if (!reader) return;
-	if (reader->first)
-		free_node_and_next(reader->first);
-	
-	free(reader);
-}
+  if (!reader)
+    return;
+  if (reader->first)
+    free_node_and_next(reader->first);
 
+  free(reader);
+}

src/compiler/fzl_token.c

@@ -2,28 +2,27 @@
 #include <stdlib.h>
 #include <string.h>
 
-fzl_token_t *fzl_mktoken(
-	const fzl_toktype_t type, uint16_t from, uint16_t to,
-	void *value, size_t value_len)
+fzl_token_t *fzl_mktoken(const fzl_toktype_t type, uint16_t from, uint16_t to,
+                         void *value, size_t value_len)
 {
-	void *valholder = malloc(value_len);
-	memcpy(valholder, value, value_len);
+  void *valholder = malloc(value_len);
+  memcpy(valholder, value, value_len);
 
-	fzl_token_t *token = malloc(sizeof(fzl_token_t));
-	token->type = type;
-	token->i0 = from;
-	token->i1 = to;
-	token->store_value = value_len > 0;
-	token->value = valholder;
-	token->value_sz = value_len;
+  fzl_token_t *token = malloc(sizeof(fzl_token_t));
+  token->type = type;
+  token->i0 = from;
+  token->i1 = to;
+  token->store_value = value_len > 0;
+  token->value = valholder;
+  token->value_sz = value_len;
 
-	return token;
+  return token;
 }
 
 // Free allocated token
 void fzl_freetoken(fzl_token_t *tok)
 {
-	if (tok->store_value) free(tok->value);
-	free(tok);
+  if (tok->store_value)
+    free(tok->value);
+  free(tok);
 }
-

src/compiler/main.c

@@ -1,80 +1,166 @@
-#include <stdio.h>
-#include <string.h>
-#include <compiler/fzl_reader.h>
-#include <compiler/fzl_parser.h>
 #include <compiler/fzl_debug.h>
+#include <compiler/fzl_parser.h>
+#include <compiler/fzl_reader.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-int main(int argc, char** argv) {
-	if (argc < 2)
-	{
-		printf("No files provided >:(\n");
-		return -1;
-	}
-	else if (argc > 2)
-	{
-		printf("warn: flags are not supported yet\n");
-	}
+// Build arguments setup descriptor
+typedef struct
+{
+  char *filepath;
+  bool verbose;
+  bool help;
+} build_args_t;
 
-	printf("> analyze\n-> reading file...");
-
-	char source[8192];
-	FILE *fd = fopen(argv[argc - 1], "r");
-	if (!fd)
-	{
-		printf("failed to open file '%s'\n", argv[argc-1]);
-		return -1;
-	}
-	
-	fseek(fd, 0L, SEEK_END);
-	size_t fsz = ftell(fd);
-	rewind(fd);
-
-	fread(source, fsz, 1, fd);
-	fclose(fd);
-	printf("ok!\n");
-
-	printf("-> tokenizing...");
-	fzl_reader_t *rd = fzl_mkreader(source);
-	int result = fzl_read(rd);
-	if (result != 0)
-	{
-		printf("error: %s\n", fzl_reader_geterror());
-		return -1;
-	}
-	
-	printf("ok!\n");
-
-	fzl_reader_ll_t *entry = rd->first;
-	printf("--> structure: ");
-	while (entry)
-	{
-		if (entry->token)
-		{
-			if (entry->token->store_value)
-				printf("<TOK:%d:%s>", entry->token->type, (char*)entry->token->value);
-			else
-				printf("<TOK:%d>", entry->token->type);
-		}
-
-		entry = entry->next;
-	}
-
-	printf("\n");
-
-	printf("-> parsing...");
-	fzl_parser_t *parser = fzl_mkparser(rd->first);
-	result = fzl_parse(parser);
-	if (result != 0)
-	{
-		printf("error: %s\n", fzl_parser_geterror());
-		return -1;
-	}
-
-	printf("ok!\n");
-	fzl_debug_print_ast(parser->root);
-
-	fzl_freereader(rd);
-	fzl_freeparser(parser);
-	return 0;
+// Print command usage hint
+void print_usage()
+{
+  printf("Usage: fzc [flags] <file path>\n");
+  printf("Flags:\n");
+  printf("\t-v\t--verbose\tdisplay debug information\n");
+  printf("\t-h\t--help\t\tprint usage hint (which you're looking at)\n");
 }
 
+// Read the arguments and build `build_args_t` struct
+build_args_t *getargs(int argc, char **argv)
+{
+  build_args_t *args = malloc(sizeof(build_args_t));
+  if (!args)
+    return NULL;
+
+  args->filepath = NULL;
+  args->verbose = false;
+  args->help = false;
+
+  size_t args_total = 0;
+  if (argc > 2)
+  {
+    for (int i = 1; i < argc; i++)
+    {
+      if (argv[i][0] != '-')
+        continue;
+
+      args_total++;
+
+      if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
+      {
+        args->help = true;
+      }
+      else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0)
+      {
+        args->verbose = true;
+      }
+      else
+      {
+        printf("Error: unknown argument '%s'\n", argv[i]);
+        return NULL;
+      }
+    }
+  }
+
+  if (argc - 1 - args_total < 1)
+  {
+    printf("Error: source code file is not specified.\n");
+    print_usage();
+    return NULL;
+  }
+
+  if (argv[argc - 1][0] == '-')
+  {
+    printf("Error: last argument MUST be a path to file.\n");
+    printf("Write 'fzc --help' to read help\n");
+    return NULL;
+  }
+
+  args->filepath = argv[argc - 1];
+  return args;
+}
+
+int main(int argc, char **argv)
+{
+  build_args_t *args = getargs(argc, argv);
+  if (args == NULL)
+    return -1;
+  else if (args->help)
+    return 0;
+
+  if (args->verbose)
+    printf("> analyze\n-> reading file...");
+
+  char source[8192];
+  FILE *fd = fopen(args->filepath, "r");
+  if (!fd)
+  {
+    printf("Error: failed to open file '%s'\n", args->filepath);
+    return -1;
+  }
+
+  fseek(fd, 0L, SEEK_END);
+  size_t fsz = ftell(fd);
+  rewind(fd);
+
+  fread(source, fsz, 1, fd);
+  fclose(fd);
+  if (args->verbose)
+  {
+    printf("ok!\n");
+    printf("-> tokenizing...");
+  }
+
+  fzl_reader_t *rd = fzl_mkreader(source);
+  int result = fzl_read(rd);
+  if (result != 0)
+  {
+    printf("error: %s\n", fzl_reader_geterror());
+    return -1;
+  }
+
+  if (args->verbose)
+    printf("ok!\n");
+
+  fzl_reader_ll_t *entry = rd->first;
+
+  if (args->verbose)
+  {
+    printf("--> structure: ");
+    while (entry)
+    {
+      if (entry->token)
+      {
+        if (entry->token->store_value)
+          printf("<TOK:%d:%s>", entry->token->type,
+                 (char *)entry->token->value);
+        else
+          printf("<TOK:%d>", entry->token->type);
+      }
+
+      entry = entry->next;
+    }
+
+    printf("\n");
+    printf("-> parsing...");
+  }
+
+  fzl_parser_t *parser = fzl_mkparser(rd->first);
+  result = fzl_parse(parser);
+  if (result != 0)
+  {
+    printf("Error: %s\n", fzl_parser_geterror());
+    return -1;
+  }
+
+  if (args->verbose)
+  {
+    printf("ok!\n");
+    fzl_debug_print_ast(parser->root);
+  }
+
+  free(args);
+  fzl_freereader(rd);
+  fzl_freeparser(parser);
+
+  printf("done.\n");
+  return 0;
+}