我在这里放了一个简短的源代码,因为源代码太长了。你可以在这个 git 存储库中找到完整的源代码:https://github.com/strophe/libstrophe
事实上,我在我的主 C 程序中使用 strope 作为库,它是一个 openWrt 包。
common.h(libstrope)的源代码
/** run-time context **/
typedef enum {
XMPP_LOOP_NOTSTARTED,
XMPP_LOOP_RUNNING,
XMPP_LOOP_QUIT
} xmpp_loop_status_t;
typedef struct _xmpp_connlist_t {
xmpp_conn_t *conn;
struct _xmpp_connlist_t *next;
} xmpp_connlist_t;
struct _xmpp_ctx_t {
const xmpp_mem_t *mem;
const xmpp_log_t *log;
xmpp_loop_status_t loop_status;
xmpp_connlist_t *connlist;
};
这是头文件 strope.h 源代码(libstropic):
/
* user-replaceable memory allocator */
typedef struct _xmpp_mem_t xmpp_mem_t;
/* user-replaceable log object */
typedef struct _xmpp_log_t xmpp_log_t;
/* opaque run time context containing the above hooks */
typedef struct _xmpp_ctx_t xmpp_ctx_t;
xmpp_ctx_t *xmpp_ctx_new(const xmpp_mem_t * const mem,
const xmpp_log_t * const log);
void xmpp_ctx_free(xmpp_ctx_t * const ctx);
struct _xmpp_log_t {
xmpp_log_handler handler;
void *userdata;
/* mutex_t lock; */
};
ctx.c简要源代码(libstrope):
xmpp_ctx_t *xmpp_ctx_new(const xmpp_mem_t * const mem,
const xmpp_log_t * const log)
{
xmpp_ctx_t *ctx = NULL;
if (mem == NULL)
ctx = xmpp_default_mem.alloc(sizeof(xmpp_ctx_t), NULL);
else
ctx = mem->alloc(sizeof(xmpp_ctx_t), mem->userdata);
if (ctx != NULL) {
if (mem != NULL)
ctx->mem = mem;
else
ctx->mem = &xmpp_default_mem;
if (log == NULL)
ctx->log = &xmpp_default_log;
else
ctx->log = log;
ctx->connlist = NULL;
ctx->loop_status = 0;//XMPP_LOOP_NOTSTARTED;
}
return ctx;
}
主C程序
#include <strophe.h>
void main()
{
xmpp_ctx_t *ctx;
xmpp_conn_t *conn;
xmpp_log_t *log;
char *jid, *pass;
create a context */
log = xmpp_get_default_logger(XMPP_LEVEL_DEBUG); /* pass NULL instead to silence output */
ctx = xmpp_ctx_new(NULL, log);
/* create a connection */
conn = xmpp_conn_new(ctx);
/* setup authentication information */
xmpp_conn_set_jid(conn, "jid");
xmpp_conn_set_pass(conn, "pass");
/* initiate connection */
xmpp_connect_client(conn, "alt3.xmpp.l.google.com", 5222, conn_handler, ctx);
ctx->loop_status = 1; // error error: dereferencing pointer to incomplete type
/* enter the event loop -
our connect handler will trigger an exit */
xmpp_run(ctx);
/* release our connection and context */
xmpp_conn_release(conn);
xmpp_ctx_free(ctx);
/* final shutdown of the library */
xmpp_shutdown();
}
使用此源代码编译时出现此错误:
error: dereferencing pointer to incomplete type
最佳答案
是循环依赖头问题。
文件 strope.h 必须包含在 common.h 之前
由于 stropice.h 中的类型必须被 common.h 所识别
#include "strophe.h"
#include "common.h"
void main()
{
xmpp_ctx_t *ctx;
xmpp_initialize();
ctx = xmpp_ctx_new(NULL, log);
/* create a connection */
conn = xmpp_conn_new(ctx);
xmpp_connect_client(conn, "alt3.xmpp.l.google.com", 5222, conn_handler,
ctx);
ctx->loop_status = 1; // error error: dereferencing pointer to incomplete type
xmpp_run(ctx);
}
关于c - 错误: dereferencing pointer to incomplete type when compil C program,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27568645/