main.go

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // This file is here just to cause problems.
     6  // main.swig turns into a file also named main.go.
     7  // Make sure cmd/go keeps them separate
     8  // when both are passed to cgo.
     9  
    10  package main
    11  
    12  //int F(void) { return 1; }
    13  import "C"
    14  import (
    15  	"fmt"
    16  	"os"
    17  )
    18  
    19  func F() int { return int(C.F()) }
    20  
    21  func main() {
    22  	if x := int(C.F()); x != 1 {
    23  		fatal("x = %d, want 1", x)
    24  	}
    25  
    26  	// Open this file itself and verify that the first few characters are
    27  	// as expected.
    28  	f := Fopen("main.go", "r")
    29  	if f.Swigcptr() == 0 {
    30  		fatal("fopen failed")
    31  	}
    32  	if Fgetc(f) != '/' || Fgetc(f) != '/' || Fgetc(f) != ' ' || Fgetc(f) != 'C' {
    33  		fatal("read unexpected characters")
    34  	}
    35  	if Fclose(f) != 0 {
    36  		fatal("fclose failed")
    37  	}
    38  
    39  	println("OK")
    40  }
    41  
    42  func fatal(f string, args ...any) {
    43  	fmt.Fprintln(os.Stderr, fmt.Sprintf(f, args...))
    44  	os.Exit(1)
    45  }
    46
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