This is a bridge to c libraries on Linux and Darwin systems, it can be imported with one line of code.

instead of

#if os(Linux)
import Glibc
#else
import Darwin
#endif

we can just type

import C

Example of c functions in swift:

The following example creates a file pointer, like in c.

import C
...
var fp = fopen("path/To/File", "r+")
// check if file exists
if fp != nil {
  print("file exists")
  print(type(of: fp)) // `UnsafeMutablePointer<FILE>` == `FILE*`
  fclose(fp)
}

Importing C:

To include C in your project, you need to add the following to the dependencies attribute defined in your Package.swift file.

dependencies: [
  .package(url: "https://github.com/alja7dali/swift-c.git", from: "1.0.0")
]