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字符串到 char (*array)[]

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字符串到 char (*array)[]

寶慕林4294392 2023-08-14 16:21:00

//file.gofunc main() { message := "My Message :)" // I've tried this slice before. // tmpslice := (*[1 << 30]*C.char)(unsafe.Pointer(argv))[:length:length] argv := make([]*C.char, len(message)) for i, s := range str { cs := C.CString(string(s)) defer C.free(unsafe.Pointer(cs)) argv[i] = cs } C.notifyWebhook(&argv)} //file.c void notiftWebhook(char (*message)[]) { printf("notiftWebhook executed | argv: %s \n", *message); char url[500]; char data[200]; int user_id = 0xdeadfeed; snprintf(url,500,"https://webhook.site/a6a8d1ae-6766-4d90-a4c8-87a9599bfbf0",token); snprintf(data,200,"user_id=%d&text=%s",user_id,*message); CURL *curl; //CURLcode res; //static const char *postthis = "moo mooo moo moo"; curl_global_init(CURL_GLOBAL_ALL); curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, url); curl_easy_setopt(curl, CURLOPT_POSTFIELDS,data); curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); curl_easy_perform(curl); } curl_global_cleanup();}編譯器返回：cgo-gcc-prolog:129:19: 錯誤：數組大小為負數我編寫了一個 webhook 函數，但觸發了 notificationWebhook 函數并發送了錯誤的參數。為什么？我哪里會犯錯誤？

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1 回答

BIG陽

TA貢獻1859條經驗獲得超6個贊

字符串到 char (*array)[]

cgo-gcc-prolog: error: array size is negative

使用墊片。例如，

so.go:

// string to char (*array)[]

package main

#include <stdlib.h>

#include <stdio.h>

void notify(char (*message)[]) {

printf("notify | argv: %1$p %1$s\n", *message);

}

void shimmy(char *message[]) {

printf("shimmy | argv: %1$p %1$s\n", *message);

notify((char (*)[])*message);

}

import "C"

import (

"fmt"

"unsafe"

)

func main() {

message := "My Message :)"

cs := C.CString(message)

defer C.free(unsafe.Pointer(cs))

fmt.Printf("main | argv: %p %s\n", cs, C.GoString(cs))

C.shimmy(&cs)

}

輸出：

$ go run so.go

main | argv: 0x19cb820 My Message :)

shimmy | argv: 0x19cb820 My Message :)

notify | argv: 0x19cb820 My Message :)

$ go version

go version devel +4d5bb9c609 Fri Dec 20 23:07:52 2019 +0000 linux/amd64

$ go env CC

gcc

$ gcc --version

gcc (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008

反對回復 2023-08-14

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字符串到 char (*array)[]

字符串到 char (*array)[]

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