c++ - uint32_t variable is strange changing -


i have simple code:

#define num_ua_sock     100  typedef struct _ua_request {     string full_url;     uint32_t        url_adler32 ;     tcpsocket   sock_ua ;     uint32_t    status_flag ;               // ref enum status } ua_request ;  ua_request  glb_array__ua_req[ num_ua_sock ] ;  void handle_ua_sock_ready( uint32_t ii ) {     string _req_mstr;      byte*request    = (byte*) _req_mstr.c_str() ;     byte*pcrlf  = null ;      ua_request*ar = glb_array__ua_req ;      // request ua     int32_t nrcv ;      printf("index =  %lu\n", ii);     tcpsocket sock = ar[ii].sock_ua;     nrcv = sdlnet_tcp_recv( sock , request , maxlen ) ;     printf("after index =  %lu\n", ii); }

the ii variable in begin of handle_ua_sock_ready() func has 0 value. after invoking nrcv = sdlnet_tcp_recv( sock , request , maxlen ) ; line becomes have big value instance 1852397344. single-threaded app. i'm using vs 2010, sdl, sdl_net libraries. ps: when compiled under linux, works fine.

you're passing in request sdlnet_tcp_recv function , telling function request points buffer of size maxlen. request comes casting away constness buffer of empty std::string wrong.

you want vector

std::vector<unsigned char> request; request.resize(maxlen);  ...  nrcv = sdlnet_tcp_recv( sock , request.data() , request.size() ) ;

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