libgo/misc/cgo/test/issue12030.go

   1 // Copyright 2015 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 // Issue 12030. sprintf is defined in both ntdll and msvcrt,
   6 // Normally we want the one in the msvcrt.
   7
   8 package cgotest
   9
  10 /*
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 void issue12030conv(char *buf, double x) {
  14         sprintf(buf, "d=%g", x);
  15 }
  16 */
  17 import "C"
  18
  19 import (
  20         "fmt"
  21         "testing"
  22         "unsafe"
  23 )
  24
  25 func test12030(t *testing.T) {
  26         buf := (*C.char)(C.malloc(256))
  27         defer C.free(unsafe.Pointer(buf))
  28         for _, f := range []float64{1.0, 2.0, 3.14} {
  29                 C.issue12030conv(buf, C.double(f))
  30                 got := C.GoString(buf)
  31                 if want := fmt.Sprintf("d=%g", f); got != want {
  32                         t.Fatalf("C.sprintf failed for %g: %q != %q", f, got, want)
  33                 }
  34         }
  35 }