cgo **char 切片字符串

Question

我已经使用 cgo 开发了一个 pam 模块。不能转换为 []string a ** charfunc pam_sm_authenticate(pamh *C.pam_handle_t, flags C.int, argc C.int, argv **C.char) int {        fmt.Println(C.GoString(*argv[0]))        return 0}错误是invalid operation: argv[0] (type **C.char does not support indexing)如果你知道，请告诉我。

Answer 1

从 cgo wiki 拼凑而成：https : //github.com/golang/go/wiki/cgo#Turning_C_arrays_into_Go_slices。

import "C"

import "unsafe"

func GoStrings(argc C.int, argv **C.char) []string {

    length := int(argc)

    tmpslice := (*[1 << 30]*C.char)(unsafe.Pointer(argv))[:length:length]

    gostrings := make([]string, length)

    for i, s := range tmpslice {

        gostrings[i] = C.GoString(s)

    }

    return gostrings

}