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cgo: add support for C.CString and related functions

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This commit is contained in:
Ayke van Laethem
2021-11-11 16:11:08 +01:00
committed by Ron Evans
parent 6bd18af5ef
commit c31aef06ba
14 changed files with 238 additions and 3 deletions
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testdata/cgo/main.go
Vendored
+15
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@@ -135,6 +135,21 @@ func main() {
// void arraydecay(int *buf1, int *buf2[8], int *buf3[7][2]);
C.arraydecay((*C.int)(nil), (*[8]C.int)(nil), (*[7][2]C.int)(nil))
// Test CGo builtins like C.CString.
cstr := C.CString("string passed to C")
println("cstr length:", C.strlen(cstr))
gostr := C.GoString(cstr)
println("C.CString:", gostr)
charBuf := C.GoBytes(unsafe.Pointer(&C.globalChars[0]), 4)
println("C.charBuf:", charBuf[0], charBuf[1], charBuf[2], charBuf[3])
binaryString := C.GoStringN(&C.globalChars[0], 4)
println("C.CStringN:", len(binaryString), binaryString[0], binaryString[1], binaryString[2], binaryString[3])
// Test whether those builtins also work with zero length data.
println("C.GoString(nil):", C.GoString(nil))
println("len(C.GoStringN(nil, 0)):", len(C.GoStringN(nil, 0)))
println("len(C.GoBytes(nil, 0)):", len(C.GoBytes(nil, 0)))
// libc: test whether C functions work at all.
buf1 := []byte("foobar\x00")
buf2 := make([]byte, len(buf1))