read = _IO_sgetn (fp, (char *) buf, bytes_requested); __release_lock (fp); returnbytes_requested == bytes_read ? count: bytes_read / size; } __size_t _IO_fread (void *buf,_IO_size_t size,_IO_size_t count,_IO_FILE *fp) { _IO_size_t bytes_requested = size * ...
// 获取文件内容 pbuf->sgetn (buffer,size); (); // 输出到标准输出 (buffer,size); delete []buffer; return 0; } @4.注意的问题: 在这个演示程序中,如果采用文本方式打开会如何呢?即把C实现中的文件打开改为pFile = fopen ("","r" ),C++中的文件打开改为 ("") 虽然这个用于测试的文件本身是...
sget 表示Stream Get sgetn Stream Get N bytes xsgetn eXtended Stream Get N bytes 七、如果说没有fclose时写入缓冲如何处理 因为这里已经废话很多了,所以放一个调用链就好了,这个应该是一个很详细的资料了 (gdb) bt #0 0x080661f0 in write () #1 0x0804ab41 in _IO_new_file_write (f=0x80d5f70...
rdbuf: Returns a pointer to the internal stringbuf object, with which the object was associated on construction std::stringstream ss2; // using stringbuf directly: std::stringbuf *pbuf = ss2.rdbuf(); pbuf->sputn("Example string", 13);//输入 13个字符的字符串 char buffer[80]; pbuf->s...
一旦深入了解 IOStreams 的直接表面,例如,如果你想用自己的类扩展 IOStreams,你就会得到一个具有相当神秘和令人困惑的成员函数名称的接口,例如getloc/imbue,uflow/underflow,snextc/sbumpc/sgetc/sgetn,pbase/pptr/epptr(可能还有更糟糕的例子)。这使得理解整体设计以及单个部件如何协作变得更加困难。即使我上面提到的那...
9:intsgetn(charT*,intN); 10:}; 现在除了那些刺眼的typedef,这个模板和原来的也没啥太大区别,但是确实只剩一个用户感兴趣的模板参数了。编译器会去字符的traits class里查找关于字符类型的信息。 除了一些变量的声明方式有些不同,使用这个模板的用户代码也会和从前一样。
sgetn invokes xsgetn() (public member function of std::basic_streambuf<CharT,Traits>) Put area sputc writes one character to the put area and advances the next pointer (public member function of std::basic_streambuf<CharT,Traits>) sputn invokes xsputn() (public member function...
_IO_sgetn 0000000000417660 T _IO_sputbackc 0000000000471890 T _IO_sputbackwc 00000000006b9798 D _IO_stderr 00000000006bbd40 b _IO_stdfile_0_lock 00000000006bbd30 b _IO_stdfile_1_lock 00000000006bbd20 b _IO_stdfile_2_lock 00000000006b97a8 D _IO_stdin 0000000000492220 R _IO_stdin_...
/opt/arm-2009q1/arm-2009q1/bin/../arm-none-linux-gnueabi/libc/usr/include/libio.h:493: error: expected '=', ',', ';', 'asm' or '__attribute__' before '_IO_sgetn' In file included from client_sock.c:1: /opt/arm-2009q1/arm-2009q1/bin/../arm-none-linux-gnueabi/libc/usr...
'asm' or '__attribute__' before '_IO_sgetn' extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t); ^ In file included from prog.c:48:0: /usr/include/stdio.h:319:35: error: expected declaration specifiers or '...' before 'size_t' extern FILE *fmemopen (void ...