Norminette Checker

Automatically verify C code compliance with 42 School's Norminette standards.

Key Norminette Rules

File Structure

• •Header: Standard 42 header required in all files
• •Header Guards: #ifndef, #define, #endif in .h files
• •Max Line Length: 80 characters (including newline)
• •Max Function Length: 25 lines
• •Functions per File: Maximum 5 functions

Formatting Rules

• •Indentation: Tabs only (no spaces)
• •Control Structure Braces:
  c

  if (condition)
  {
      // code on new line
  }
  

• •Function Braces:
  c

  int function(void)
  {
      // opening brace on new line
  }
  

• •Spaces:
  • •After keywords: if (, while (, return
  • •Around operators: a + b, i = 0
  • •No space before semicolon

Naming Conventions

• •Functions: ft_strlen, init_data (lowercase + underscore)
• •Variables: last_meal_time, count (lowercase + underscore)
• •Macros: MAX_PHILOS, BUFFER_SIZE (UPPERCASE)
• •Structs: struct s_philo (prefix s_)
• •Typedefs: t_philo, t_data (prefix t_)

Common Violations

1. •Line too long: Split at operators or function parameters
2. •Function too long: Extract logic into helper functions
3. •Too many functions: Split file into logical modules
4. •Mixed spaces/tabs: Use tabs only for indentation
5. •Missing newline at EOF: Add empty line at file end
6. •Multiple newlines: Remove extra blank lines
7. •Space before semicolon: Remove space
8. •Forbidden functions: Use only allowed functions per subject

Process

1. •Check files: Run norminette *.c *.h or norminette -R CheckForbiddenSourceHeader
2. •Read errors: Identify specific violations and line numbers
3. •Fix violations: Apply corrections following rules above
4. •Verify: Re-run norminette to confirm fixes
5. •Common fixes:
   • •Line length → break at logical points
   • •Function length → extract subfunctions
   • •Formatting → adjust braces/spaces
   • •Naming → rename to convention

Standard 42 Header Template

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   filename.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: login <login@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: YYYY/MM/DD HH:MM:SS by login            #+#    #+#             */
/*   Updated: YYYY/MM/DD HH:MM:SS by login           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

Quick Fixes

Line Too Long

// Before (83 chars)
printf("Philosopher %d has taken a fork and is now eating spaghetti\n", id);

// After (split string)
printf("Philosopher %d has taken a fork and is now eating "
    "spaghetti\n", id);

Function Too Long

Extract repeated logic:

// Before: 30-line function
int process_data(t_data *data)
{
    // validation (5 lines)
    // processing (20 lines)
    // cleanup (5 lines)
}

// After: split into helpers
int validate_data(t_data *data);
int process_logic(t_data *data);
int cleanup_data(t_data *data);

Check Command

# Check all files
norminette

# Check specific files
norminette src/*.c include/*.h

# Ignore header check (for testing)
norminette -R CheckDefine src/main.c