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 * ...
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...
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...
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...
’ before ‘size_t’ size_t __n); ^~~~ /usr/include/x86_64-linux-gnu/bits/libio.h:467:19: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘_IO_sgetn’ extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t); ^~~~ In file incl...
Similar to sgetn. This function is available for 64-bit applications. The second argument is a long value. Get/Put Pointer Functions dbp public:void dbp() This is supported on Writes to standard output the values returned by the following functions: ...
5. int main () { 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. } delete []buffer; return 0; filestr.close(); // 输出到标准输出 cout.write (buffer,size); // 获取文件内容 pbuf->sgetn (buffer,size...
_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...
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...