diff options
Diffstat (limited to 'libio/wfileops.c')
| -rw-r--r-- | libio/wfileops.c | 92 |
1 files changed, 90 insertions, 2 deletions
diff --git a/libio/wfileops.c b/libio/wfileops.c index 92d1a08..35d201b 100644 --- a/libio/wfileops.c +++ b/libio/wfileops.c @@ -143,7 +143,7 @@ _IO_wfile_underflow (fp) int tries; const char *read_ptr_copy; - if (fp->_flags & _IO_NO_READS) + if (__builtin_expect (fp->_flags & _IO_NO_READS, 0)) { fp->_flags |= _IO_ERR_SEEN; __set_errno (EBADF); @@ -161,10 +161,12 @@ _IO_wfile_underflow (fp) const char *read_stop = (const char *) fp->_IO_read_ptr; fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state; + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr = + fp->_wide_data->_IO_buf_base; status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state, fp->_IO_read_ptr, fp->_IO_read_end, &read_stop, - fp->_wide_data->_IO_read_end, + fp->_wide_data->_IO_read_ptr, fp->_wide_data->_IO_buf_end, &fp->_wide_data->_IO_read_end); @@ -306,6 +308,67 @@ _IO_wfile_underflow (fp) } +static wint_t +_IO_wfile_underflow_mmap (_IO_FILE *fp) +{ + struct _IO_codecvt *cd; + enum __codecvt_result status; + + if (__builtin_expect (fp->_flags & _IO_NO_READS, 0)) + { + fp->_flags |= _IO_ERR_SEEN; + __set_errno (EBADF); + return WEOF; + } + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr; + + cd = fp->_codecvt; + + /* Maybe there is something left in the external buffer. */ + if (fp->_IO_read_ptr < fp->_IO_read_end) + { + /* There is more in the external. Convert it. */ + const char *read_stop = (const char *) fp->_IO_read_ptr; + + if (fp->_wide_data->_IO_buf_base == NULL) + { + /* Maybe we already have a push back pointer. */ + if (fp->_wide_data->_IO_save_base != NULL) + { + free (fp->_wide_data->_IO_save_base); + fp->_flags &= ~_IO_IN_BACKUP; + } + _IO_wdoallocbuf (fp); + } + + fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state; + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr = + fp->_wide_data->_IO_buf_base; + status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state, + fp->_IO_read_ptr, fp->_IO_read_end, + &read_stop, + fp->_wide_data->_IO_read_ptr, + fp->_wide_data->_IO_buf_end, + &fp->_wide_data->_IO_read_end); + + fp->_IO_read_ptr = (char *) read_stop; + + /* If we managed to generate some text return the next character. */ + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr; + + /* There is some garbage at the end of the file. */ + __set_errno (EILSEQ); + fp->_flags |= _IO_ERR_SEEN; + return WEOF; + } + + fp->_flags |= _IO_EOF_SEEN; + return WEOF; +} + + wint_t _IO_wfile_overflow (f, wch) _IO_FILE *f; @@ -789,3 +852,28 @@ struct _IO_jump_t _IO_wfile_jumps = JUMP_INIT(showmanyc, _IO_default_showmanyc), JUMP_INIT(imbue, _IO_default_imbue) }; + + +struct _IO_jump_t _IO_wfile_jumps_mmap = +{ + JUMP_INIT_DUMMY, + JUMP_INIT(finish, _IO_new_file_finish), + JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow), + JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow_mmap), + JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow), + JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail), + JUMP_INIT(xsputn, _IO_wfile_xsputn), + JUMP_INIT(xsgetn, _IO_file_xsgetn), + JUMP_INIT(seekoff, _IO_wfile_seekoff), + JUMP_INIT(seekpos, _IO_default_seekpos), + JUMP_INIT(setbuf, _IO_new_file_setbuf), + JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync), + JUMP_INIT(doallocate, _IO_wfile_doallocate), + JUMP_INIT(read, _IO_file_read), + JUMP_INIT(write, _IO_new_file_write), + JUMP_INIT(seek, _IO_file_seek), + JUMP_INIT(close, _IO_file_close_mmap), + JUMP_INIT(stat, _IO_file_stat), + JUMP_INIT(showmanyc, _IO_default_showmanyc), + JUMP_INIT(imbue, _IO_default_imbue) +}; |