On Tuesday 14, Digital wrote:
I've been trying this for a very long time, never succeeded in passing
binary data.
But here is a function:
static int testfunc(lua_State *L)
{
printf("test func\n");
char *arg1;
int i;
size_t len = 0;
arg1 = luaL_checklstring(L, 1, &len);
//arg1 = luaL_checkudata(L, 1, &len);
//arg1 = lua_touserdata(L, 1);
//len=strlen(arg1);
printf("Size = %s\n",arg1);
Don't try to print binary data with printf().
printf("arg1 len = %zd\n", len);
/* print hex dump of arg1 */
for(i = 0; i < len; i++) {
if((i % 16) == 0 && i > 0) printf("\n");
printf("%02x ", arg1[i]);
}
printf("\n");
FILE *sfile;
sfile = fopen("testfilebinary.txt","wb");
fwrite(arg1,len,1,sfile);
Also check the return value from fwrite(). Also I would swap the 'len' & '1'
parameters.
size_t rc = fwrite(arg1, 1, len, sfile);
printf("fwrite() = %zd\n", rc);
fclose(sfile);
return 0;
}
