A general purpose single-header preprocessor library.

Supported directives

The following directives are currently supported:

• #define <word>
• #undef <word>
• #if <condition>
• #elif <condition>
• #else
• #endif
• #include (via set_include_callback)
• Other arbitrary directives (via set_command_callback)

Example usage:

static char* read_file(const char* path, size_t* out_size) { /* ... */ }
int main()
{
  // Read contents of file "SomeFile.txt" into "buffer"
  size_t size;
  char* buffer = read_file("SomeFile.txt", &size);
  // Create a preprocessor
  ccpp::processor p;
  // Add some definitions
  p.add_define("SOME_DEFINE");
  // Begin processing
  p.process(buffer, size);
  // Dump output
  printf("%s\n", buffer);
  return 0;
}

Motivation

I couldn't find a good simple no-dependencies preprocessor library for general purpose use that was also permissively licensed, so I decided to make my own.

This was made primarily as a preprocessor for Openplanet's scripts.

License

MIT license.