02ce200528
* BUG: Correctly handle interrupted system calls in streams defined outside of the interpreter. [GB.QT.EXT] * BUG: Handle cursor moves correctly when procedures are folded. git-svn-id: svn://localhost/gambas/trunk@1711 867c0c6c-44f3-4631-809d-bfa615b0a4ec
1152 lines
20 KiB
C
1152 lines
20 KiB
C
/***************************************************************************
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stream.c
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The stream management routines
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(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define __GBX_STREAM_C
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#include "gb_common.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include "gb_common_buffer.h"
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#include "gb_common_swap.h"
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#include "gb_common_check.h"
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#include "gb_error.h"
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#include "gbx_value.h"
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#include "gb_limit.h"
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#include "gbx_exec.h"
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#include "gbx_project.h"
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#include "gb_file.h"
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#include "gambas.h"
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#include "gbx_regexp.h"
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#include "gbx_api.h"
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#include "gbx_string.h"
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#include "gbx_watch.h"
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#include "gbx_stream.h"
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int STREAM_eff_read;
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bool STREAM_in_archive(const char *path)
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{
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ARCHIVE *arch;
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if (FILE_is_relative(path))
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{
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ARCHIVE_get_current(&arch);
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if (arch->name || EXEC_arch) // || !FILE_exist_real(path)) - Why that test ?
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return TRUE;
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}
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return FALSE;
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}
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static int STREAM_get_readable(STREAM *stream, int *len)
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{
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int fd;
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int ret;
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off_t off;
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off_t end;
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fd = STREAM_handle(stream);
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//_IOCTL:
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#ifdef FIONREAD
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if (!stream->common.no_fionread)
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{
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ret = ioctl(fd, FIONREAD, len);
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if (ret >= 0)
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return 0;
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stream->common.no_fionread = TRUE;
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}
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#endif
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//_LSEEK:
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if (!stream->common.no_lseek)
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{
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off = lseek(fd, 0, SEEK_CUR);
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if (off >= 0)
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{
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end = lseek(fd, 0, SEEK_END);
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if (end >= 0)
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{
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*len = (int)(end - off);
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off = lseek(fd, off, SEEK_SET);
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if (off >= 0)
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return 0;
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}
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}
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stream->common.no_lseek = TRUE;
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}
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//fprintf(stderr, "STREAM_get_readable: lseek: %d\n", *len);
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return (-1);
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}
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static int default_eof(STREAM *stream)
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{
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int fd;
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int ilen;
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fd = STREAM_handle(stream);
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if (fd < 0 || STREAM_get_readable(stream, &ilen))
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return TRUE;
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return (ilen == 0);
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}
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void STREAM_open(STREAM *stream, const char *path, int mode)
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{
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if (FILE_is_relative(path))
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{
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ARCHIVE *arch;
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ARCHIVE_get_current(&arch);
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if (arch->name || EXEC_arch) // || !FILE_exist_real(path)) - Why that test ?
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{
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stream->type = &STREAM_arch;
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goto _OPEN;
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}
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if ((mode & ST_ACCESS) != ST_READ || mode & ST_PIPE)
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THROW(E_ACCESS);
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}
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if (mode & ST_PIPE)
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{
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stream->type = &STREAM_pipe;
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}
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else
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{
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if (mode & ST_DIRECT)
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stream->type = &STREAM_direct;
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else
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stream->type = &STREAM_buffer;
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}
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_OPEN:
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stream->common.mode = mode;
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stream->common.swap = FALSE;
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stream->common.eol = 0;
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stream->common.buffer = NULL;
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stream->common.buffer_pos = 0;
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stream->common.buffer_len = 0;
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stream->common.no_fionread = FALSE;
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stream->common.no_lseek = FALSE;
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if ((*(stream->type->open))(stream, path, mode, NULL))
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{
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stream->type = NULL;
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THROW_SYSTEM(errno, path);
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}
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}
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void STREAM_release(STREAM *stream)
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{
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if (stream->common.buffer)
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{
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FREE(&stream->common.buffer, "STREAM_close");
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stream->common.buffer_pos = 0;
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stream->common.buffer_len = 0;
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}
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}
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void STREAM_close(STREAM *stream)
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{
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int fd;
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if (!stream->type)
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return;
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fd = STREAM_handle(stream);
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if (fd >= 0)
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GB_Watch(fd, GB_WATCH_NONE, NULL, 0);
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if (!(*(stream->type->close))(stream))
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stream->type = NULL;
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STREAM_release(stream);
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}
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void STREAM_flush(STREAM *stream)
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{
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if (!stream->type)
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THROW(E_CLOSED);
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(*(stream->type->flush))(stream);
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}
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static void read_buffer(STREAM *stream, void **addr, int *len)
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{
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int l = stream->common.buffer_len - stream->common.buffer_pos;
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if (l > *len)
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l = *len;
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if (l > 0)
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{
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memcpy(*addr, stream->common.buffer + stream->common.buffer_pos, l);
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*addr = (char *)*addr + l;
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*len -= l;
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STREAM_eff_read += l;
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stream->common.buffer_pos += l;
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}
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}
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void STREAM_read(STREAM *stream, void *addr, int len)
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{
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STREAM_eff_read = 0;
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if (!stream->type)
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THROW(E_CLOSED);
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if (stream->common.buffer)
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read_buffer(stream, &addr, &len);
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while ((*(stream->type->read))(stream, addr, len))
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{
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switch(errno)
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{
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case EINTR:
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break;
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case 0:
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case EAGAIN:
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THROW(E_EOF);
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case EIO:
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THROW(E_READ);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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}
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char STREAM_getchar(STREAM *stream)
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{
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char c = 0;
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bool ret;
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if (!stream->type)
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THROW(E_CLOSED);
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if (stream->common.buffer && stream->common.buffer_pos < stream->common.buffer_len)
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return stream->common.buffer[stream->common.buffer_pos++];
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for(;;)
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{
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if (stream->type->getchar)
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ret = (*(stream->type->getchar))(stream, &c);
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else
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ret = (*(stream->type->read))(stream, &c, 1);
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if (!ret)
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break;
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switch(errno)
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{
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case EINTR:
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continue;
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case 0:
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case EAGAIN:
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THROW(E_EOF);
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case EIO:
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THROW(E_READ);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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return c;
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}
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static void STREAM_read_max(STREAM *stream, void *addr, int len)
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{
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bool err;
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STREAM_eff_read = 0;
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int flags, handle;
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if (!stream->type)
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THROW(E_CLOSED);
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if (stream->common.buffer)
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read_buffer(stream, &addr, &len);
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if (len > 0)
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{
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for(;;)
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{
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if (stream->common.available_now)
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{
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err = (*(stream->type->read))(stream, addr, len);
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}
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else
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{
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handle = STREAM_handle(stream);
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flags = fcntl(handle, F_GETFL);
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fcntl(handle, F_SETFL, flags | O_NONBLOCK);
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err = (*(stream->type->read))(stream, addr, len);
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fcntl(handle, F_SETFL, flags);
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}
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if (!err)
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break;
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switch(errno)
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{
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case EINTR:
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continue;
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case 0:
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case EAGAIN:
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return;
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case EIO:
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return; //THROW(E_READ);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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}
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}
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void STREAM_write(STREAM *stream, void *addr, int len)
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{
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if (!stream->type)
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THROW(E_CLOSED);
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while ((*(stream->type->write))(stream, addr, len))
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{
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switch(errno)
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{
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case EINTR:
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break;
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case EIO:
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THROW(E_WRITE);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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}
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void STREAM_write_eol(STREAM *stream)
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{
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if (!stream->type)
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THROW(E_CLOSED);
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switch(stream->common.eol)
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{
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case ST_EOL_UNIX: STREAM_write(stream, "\n", 1); break;
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case ST_EOL_WINDOWS: STREAM_write(stream, "\r\n", 2); break;
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case ST_EOL_MAC: STREAM_write(stream, "\r", 1); break;
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}
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}
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int64_t STREAM_tell(STREAM *stream)
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{
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int64_t pos;
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if (!stream->type)
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THROW(E_CLOSED);
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if (stream->type->tell(stream, &pos))
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/*THROW(E_SEEK, ERROR_get());*/
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THROW_SYSTEM(errno, NULL);
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return pos;
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}
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void STREAM_seek(STREAM *stream, int64_t pos, int whence)
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{
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if (!stream->type)
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THROW(E_CLOSED);
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if (stream->type->seek(stream, pos, whence))
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{
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switch(errno)
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{
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case EINVAL:
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THROW(E_ARG);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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}
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static void fill_buffer(STREAM *stream, char *addr)
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{
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bool err;
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int flags, fd;
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STREAM_eff_read = 0;
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fd = STREAM_handle(stream);
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for(;;)
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{
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if (stream->common.available_now)
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err = (*(stream->type->read))(stream, addr, STREAM_BUFFER_SIZE);
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else
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{
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//printf("WATCH_process(%d, -1)\n", fd); fflush(stdout);
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WATCH_process(fd, -1);
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flags = fcntl(fd, F_GETFL);
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if ((flags & O_NONBLOCK) == 0)
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fcntl(fd, F_SETFL, flags | O_NONBLOCK);
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//printf("read\n"); fflush(stdout);
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err = (*(stream->type->read))(stream, addr, STREAM_BUFFER_SIZE);
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if ((flags & O_NONBLOCK) == 0)
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fcntl(fd, F_SETFL, flags);
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}
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if (!err)
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break;
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switch(errno)
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{
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case EINTR:
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continue;
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case 0:
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case EAGAIN:
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case EINPROGRESS:
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return;
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case EIO:
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return; //THROW(E_READ);
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default:
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THROW_SYSTEM(errno, NULL);
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}
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}
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}
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static void input(STREAM *stream, char **addr, boolean line)
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{
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int len = 0;
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int start;
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unsigned char c, lc = 0;
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void *test;
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bool eol;
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char *buffer;
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short buffer_len;
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short buffer_pos;
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*addr = NULL;
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stream->common.eof = FALSE;
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if (!line)
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test = &&__TEST_INPUT;
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else
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{
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switch(stream->common.eol)
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{
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case 1: test = &&__TEST_WINDOWS; break;
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case 2: test = &&__TEST_MAC; break;
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default: test = &&__TEST_UNIX; break;
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}
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}
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if (!STREAM_is_blocking(stream) && STREAM_eof(stream))
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{
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//printf("EOF!\n"); fflush(stdout);
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THROW(E_EOF);
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}
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buffer = stream->common.buffer;
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buffer_len = stream->common.buffer_len;
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buffer_pos = stream->common.buffer_pos;
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if (!buffer)
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{
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ALLOC(&buffer, STREAM_BUFFER_SIZE, "input");
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buffer_pos = 0;
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buffer_len = 0;
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}
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|
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/*eof_func = stream->type->eof;
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if (!eof_func)
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eof_func = default_eof;*/
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start = buffer_pos;
|
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for(;;)
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{
|
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if (buffer_pos == buffer_len)
|
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{
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if (len)
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{
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//add_string(addr, &len_str, stream->common.buffer + start, len);
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STRING_add(addr, buffer + start, len);
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len = 0;
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}
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stream->common.buffer = buffer;
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stream->common.buffer_pos = buffer_pos;
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stream->common.buffer_len = buffer_len;
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//printf("fill_buffer: (is_file = %d)\n", stream->common.is_file); fflush(stdout);
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fill_buffer(stream, buffer);
|
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//STREAM_read_max(stream, buffer, STREAM_BUFFER_SIZE);
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buffer_pos = 0;
|
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buffer_len = STREAM_eff_read;
|
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|
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#if 0
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printf("-> %d: ", buffer_len);
|
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{
|
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int i;
|
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for (i = 0; i < buffer_len; i++)
|
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{
|
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printf("%02X ", buffer[i]);
|
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}
|
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putchar('\n');
|
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}
|
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#endif
|
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|
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if (!buffer_len)
|
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{
|
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if (stream->common.available_now)
|
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{
|
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stream->common.eof = TRUE;
|
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break;
|
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}
|
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}
|
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|
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start = 0;
|
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}
|
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c = buffer[buffer_pos++]; //STREAM_getchar(stream);
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goto *test;
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|
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__TEST_INPUT:
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|
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eol = (c <= ' ');
|
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goto __TEST_OK;
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|
|
__TEST_UNIX:
|
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|
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eol = (c == '\n');
|
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if (lc == '\r')
|
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len--;
|
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lc = c;
|
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goto __TEST_OK;
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|
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__TEST_MAC:
|
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|
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eol = (c == '\r');
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goto __TEST_OK;
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|
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__TEST_WINDOWS:
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|
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eol = (lc == '\r') && (c == '\n');
|
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if (eol)
|
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len--;
|
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lc = c;
|
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goto __TEST_OK;
|
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|
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__TEST_OK:
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|
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if (eol)
|
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break;
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|
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len++;
|
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}
|
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|
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if (len > 0)
|
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//add_string(addr, &len_str, stream->common.buffer + start, len);
|
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STRING_add(addr, buffer + start, len);
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|
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STRING_extend_end(addr);
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|
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stream->common.buffer = buffer;
|
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stream->common.buffer_pos = buffer_pos;
|
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stream->common.buffer_len = buffer_len;
|
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}
|
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|
|
|
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void STREAM_line_input(STREAM *stream, char **addr)
|
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{
|
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input(stream, addr, TRUE);
|
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}
|
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|
|
|
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void STREAM_input(STREAM *stream, char **addr)
|
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{
|
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input(stream, addr, FALSE);
|
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}
|
|
|
|
|
|
void STREAM_read_type(STREAM *stream, TYPE type, VALUE *value, int len)
|
|
{
|
|
unsigned char data[4];
|
|
|
|
if (type == T_VARIANT)
|
|
{
|
|
STREAM_read(stream, data, 1);
|
|
type = *data;
|
|
}
|
|
|
|
value->type = type;
|
|
|
|
switch (type)
|
|
{
|
|
case T_BOOLEAN:
|
|
|
|
STREAM_read(stream, data, 1);
|
|
value->_integer.value = (*data != 0) ? (-1) : 0;
|
|
break;
|
|
|
|
case T_BYTE:
|
|
|
|
STREAM_read(stream, data, 1);
|
|
value->_integer.value = *data;
|
|
break;
|
|
|
|
case T_SHORT:
|
|
|
|
STREAM_read(stream, data, sizeof(short));
|
|
if (stream->common.swap)
|
|
SWAP_short((short *)data);
|
|
value->_integer.value = (int)*((short *)data);
|
|
break;
|
|
|
|
case T_INTEGER:
|
|
|
|
STREAM_read(stream, &value->_integer.value, sizeof(int));
|
|
if (stream->common.swap)
|
|
SWAP_int(&value->_integer.value);
|
|
break;
|
|
|
|
case T_LONG:
|
|
|
|
STREAM_read(stream, &value->_long.value, sizeof(int64_t));
|
|
if (stream->common.swap)
|
|
SWAP_double((double *)(void *)&value->_long.value);
|
|
break;
|
|
|
|
case T_SINGLE:
|
|
|
|
STREAM_read(stream, data, sizeof(float));
|
|
if (stream->common.swap)
|
|
SWAP_int((int *)data);
|
|
value->_float.value = (double)*((float *)data);
|
|
break;
|
|
|
|
case T_FLOAT:
|
|
|
|
STREAM_read(stream, &value->_float.value, sizeof(double));
|
|
if (stream->common.swap)
|
|
SWAP_double(&value->_float.value);
|
|
break;
|
|
|
|
case T_DATE:
|
|
|
|
STREAM_read(stream, &value->_date.date, sizeof(int));
|
|
STREAM_read(stream, &value->_date.time, sizeof(int));
|
|
if (stream->common.swap)
|
|
{
|
|
SWAP_int(&value->_date.date);
|
|
SWAP_int(&value->_date.time);
|
|
}
|
|
break;
|
|
|
|
case T_CSTRING:
|
|
value->type = T_STRING;
|
|
// continue
|
|
|
|
case T_STRING:
|
|
|
|
if (len == 0)
|
|
{
|
|
if (stream->type == &STREAM_memory)
|
|
{
|
|
size_t slen;
|
|
if (CHECK_strlen(stream->memory.addr + stream->memory.pos, &slen))
|
|
THROW(E_READ);
|
|
len = (int)slen;
|
|
}
|
|
else
|
|
{
|
|
STREAM_read(stream, data, 1);
|
|
|
|
switch (*data >> 6)
|
|
{
|
|
case 0:
|
|
case 1:
|
|
len = *data;
|
|
break;
|
|
|
|
case 2:
|
|
STREAM_read(stream, &data[1], 1);
|
|
*data &= 0x3F;
|
|
|
|
if (!EXEC_big_endian)
|
|
SWAP_short((short *)data);
|
|
|
|
len = *((short *)data);
|
|
break;
|
|
|
|
case 3:
|
|
STREAM_read(stream, &data[1], 3);
|
|
*data &= 0x3F;
|
|
|
|
if (!EXEC_big_endian)
|
|
SWAP_int((int *)data);
|
|
|
|
len = *((int *)data);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (len > 0)
|
|
{
|
|
STRING_new_temp_value(value, NULL, labs(len));
|
|
STREAM_read(stream, value->_string.addr, len);
|
|
}
|
|
else
|
|
{
|
|
len = (-len);
|
|
|
|
value->type = T_STRING;
|
|
STRING_new(&value->_string.addr, NULL, len);
|
|
value->_string.start = 0;
|
|
value->_string.len = len;
|
|
|
|
STREAM_read_max(stream, value->_string.addr, len);
|
|
|
|
if (STREAM_eff_read == 0)
|
|
{
|
|
value->type = T_NULL;
|
|
STRING_free(&value->_string.addr);
|
|
}
|
|
else
|
|
{
|
|
if (STREAM_eff_read < len)
|
|
{
|
|
STRING_extend(&value->_string.addr, STREAM_eff_read);
|
|
value->_string.len = STREAM_eff_read;
|
|
}
|
|
STRING_extend_end(&value->_string.addr);
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
THROW(E_TYPE, "Standard type", TYPE_get_name(type));
|
|
}
|
|
}
|
|
|
|
|
|
void STREAM_write_type(STREAM *stream, TYPE type, VALUE *value, int len)
|
|
{
|
|
unsigned char data[8];
|
|
bool write_zero;
|
|
|
|
if (type == T_VARIANT)
|
|
{
|
|
VARIANT_undo(value);
|
|
type = value->type;
|
|
*data = (unsigned char)type;
|
|
STREAM_write(stream, data, 1);
|
|
}
|
|
|
|
//value->type = type;
|
|
|
|
switch (type)
|
|
{
|
|
case T_BOOLEAN:
|
|
|
|
*data = value->_integer.value ? 0xFF : 0;
|
|
STREAM_write(stream, data, 1);
|
|
break;
|
|
|
|
case T_BYTE:
|
|
|
|
*data = (unsigned char)value->_integer.value;
|
|
STREAM_write(stream, data, 1);
|
|
break;
|
|
|
|
case T_SHORT:
|
|
|
|
*((short *)data) = (short)value->_integer.value;
|
|
if (stream->common.swap)
|
|
SWAP_short((short *)data);
|
|
STREAM_write(stream, data, sizeof(short));
|
|
break;
|
|
|
|
case T_INTEGER:
|
|
|
|
*((int *)data) = value->_integer.value;
|
|
if (stream->common.swap)
|
|
SWAP_int((int *)data);
|
|
STREAM_write(stream, data, sizeof(int));
|
|
break;
|
|
|
|
case T_LONG:
|
|
|
|
*((int64_t *)data) = value->_long.value;
|
|
if (stream->common.swap)
|
|
SWAP_double((double *)data);
|
|
STREAM_write(stream, data, sizeof(int64_t));
|
|
break;
|
|
|
|
case T_SINGLE:
|
|
|
|
*((float *)data) = (float)value->_float.value;
|
|
if (stream->common.swap)
|
|
SWAP_int((int *)data);
|
|
STREAM_write(stream, data, sizeof(float));
|
|
break;
|
|
|
|
case T_FLOAT:
|
|
|
|
*((double *)data) = value->_float.value;
|
|
if (stream->common.swap)
|
|
SWAP_double((double *)data);
|
|
STREAM_write(stream, data, sizeof(double));
|
|
break;
|
|
|
|
case T_DATE:
|
|
|
|
*((int *)data) = value->_date.date;
|
|
if (stream->common.swap)
|
|
SWAP_int((int *)data);
|
|
STREAM_write(stream, data, sizeof(int));
|
|
|
|
*((int *)data) = value->_date.time;
|
|
if (stream->common.swap)
|
|
SWAP_int((int *)data);
|
|
STREAM_write(stream, data, sizeof(int));
|
|
|
|
break;
|
|
|
|
case T_STRING:
|
|
case T_CSTRING:
|
|
|
|
write_zero = (stream->type == &STREAM_memory) && len == 0;
|
|
|
|
if (len == 0)
|
|
{
|
|
len = value->_string.len;
|
|
|
|
if (stream->type != &STREAM_memory)
|
|
{
|
|
if (len < 0x80)
|
|
{
|
|
*data = (unsigned char)len;
|
|
STREAM_write(stream, data, 1);
|
|
}
|
|
else if (len < 0x4000)
|
|
{
|
|
*((short *)data) = (short)len | 0x8000;
|
|
if (!EXEC_big_endian)
|
|
SWAP_short((short *)data);
|
|
STREAM_write(stream, data, 2);
|
|
}
|
|
else
|
|
{
|
|
*((int *)data) = len | 0xC0000000;
|
|
if (!EXEC_big_endian)
|
|
SWAP_int((int *)data);
|
|
STREAM_write(stream, data, 4);
|
|
}
|
|
}
|
|
}
|
|
|
|
STREAM_write(stream, value->_string.addr + value->_string.start, Min(len, value->_string.len));
|
|
|
|
*data = 0;
|
|
|
|
while (len > value->_string.len)
|
|
{
|
|
STREAM_write(stream, data, 1);
|
|
len--;
|
|
}
|
|
|
|
if (write_zero)
|
|
STREAM_write(stream, data, 1);
|
|
|
|
break;
|
|
|
|
case T_NULL:
|
|
|
|
*data = 0;
|
|
STREAM_write(stream, data, 1);
|
|
break;
|
|
|
|
/*case T_OBJECT:
|
|
|
|
class = OBJECT_class(value->_object.object);
|
|
if (class == CLASS_Array || CLASS_inherits(class, CLASS_Array))
|
|
{
|
|
CARRAY_stream_write((CARRAY *)value->_object.object, stream);
|
|
break;
|
|
}
|
|
else if (class == CLASS_Collection || CLASS_inherits(class, CLASS_Collection))
|
|
{
|
|
CCOLLECTION_stream_write((CCOLLECTION *)value->_object.object, stream);
|
|
break;
|
|
}*/
|
|
|
|
default:
|
|
|
|
THROW(E_TYPE, "Standard type", TYPE_get_name(type));
|
|
}
|
|
}
|
|
|
|
|
|
void STREAM_load(const char *path, char **buffer, int *rlen)
|
|
{
|
|
STREAM stream;
|
|
int64_t len;
|
|
|
|
STREAM_open(&stream, path, ST_READ);
|
|
STREAM_lof(&stream, &len);
|
|
|
|
if (len >> 31)
|
|
THROW(E_MEMORY);
|
|
|
|
*rlen = len;
|
|
|
|
ALLOC(buffer, *rlen, "STREAM_load");
|
|
|
|
STREAM_read(&stream, *buffer, *rlen);
|
|
STREAM_close(&stream);
|
|
}
|
|
|
|
|
|
bool STREAM_map(const char *path, char **buffer, int *rlen)
|
|
{
|
|
STREAM stream;
|
|
|
|
STREAM_open(&stream, path, ST_READ);
|
|
if (stream.type != &STREAM_arch)
|
|
{
|
|
STREAM_close(&stream);
|
|
STREAM_load(path, buffer, rlen);
|
|
return TRUE;
|
|
}
|
|
|
|
//fprintf(stderr, "use mmap: %s\n", path);
|
|
|
|
*buffer = (char *)stream.arch.arch->arch->addr + stream.arch.start;
|
|
*rlen = stream.arch.size;
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
int STREAM_handle(STREAM *stream)
|
|
{
|
|
if (!stream->type)
|
|
THROW(E_CLOSED);
|
|
|
|
if (stream->type->handle)
|
|
return (*stream->type->handle)(stream);
|
|
else
|
|
return (-1);
|
|
}
|
|
|
|
|
|
void STREAM_lock(STREAM *stream)
|
|
{
|
|
int64_t pos;
|
|
int fd;
|
|
|
|
if (!stream->type)
|
|
THROW(E_CLOSED);
|
|
|
|
fd = STREAM_handle(stream);
|
|
if (fd < 0)
|
|
THROW(E_LOCK);
|
|
|
|
pos = lseek(fd, 0, SEEK_CUR);
|
|
if (pos < 0)
|
|
goto __ERROR;
|
|
|
|
if (lseek(fd, 0, SEEK_SET) < 0)
|
|
goto __ERROR;
|
|
|
|
#ifdef F_TLOCK
|
|
|
|
if (lockf(fd, F_TLOCK, 0))
|
|
{
|
|
if (errno == EAGAIN)
|
|
THROW(E_LOCK);
|
|
else
|
|
goto __ERROR;
|
|
}
|
|
|
|
#else
|
|
|
|
fprintf(stderr, "locking is not implemented\n");
|
|
|
|
#endif
|
|
|
|
if (lseek(fd, pos, SEEK_SET) < 0)
|
|
goto __ERROR;
|
|
|
|
return;
|
|
|
|
__ERROR:
|
|
THROW_SYSTEM(errno, NULL);
|
|
}
|
|
|
|
|
|
|
|
void STREAM_lof(STREAM *stream, int64_t *len)
|
|
{
|
|
int fd;
|
|
int ilen;
|
|
|
|
if (!stream->type)
|
|
THROW(E_CLOSED);
|
|
|
|
if (stream->type->lof)
|
|
{
|
|
if (!(*(stream->type->lof))(stream, len))
|
|
return;
|
|
}
|
|
|
|
fd = STREAM_handle(stream);
|
|
if ((fd >= 0) && (STREAM_get_readable(stream, &ilen) == 0))
|
|
*len = ilen;
|
|
|
|
if (stream->common.buffer)
|
|
*len += stream->common.buffer_len - stream->common.buffer_pos;
|
|
}
|
|
|
|
bool STREAM_eof(STREAM *stream)
|
|
{
|
|
if (!stream->type)
|
|
THROW(E_CLOSED);
|
|
|
|
if (stream->common.buffer && stream->common.buffer_pos < stream->common.buffer_len)
|
|
return FALSE;
|
|
|
|
if (stream->type->eof)
|
|
return ((*(stream->type->eof))(stream));
|
|
else
|
|
return default_eof(stream);
|
|
}
|
|
|
|
|
|
int STREAM_read_direct(int fd, char *buffer, int len)
|
|
{
|
|
ssize_t eff_read;
|
|
ssize_t len_read;
|
|
|
|
while (len > 0)
|
|
{
|
|
len_read = Min(len, MAX_IO);
|
|
eff_read = read(fd, buffer, len_read);
|
|
|
|
if (eff_read > 0)
|
|
{
|
|
STREAM_eff_read += eff_read;
|
|
len -= eff_read;
|
|
buffer += eff_read;
|
|
}
|
|
|
|
if (eff_read < len_read)
|
|
{
|
|
if (eff_read == 0)
|
|
errno = 0;
|
|
if (eff_read <= 0 && errno != EINTR)
|
|
return TRUE;
|
|
}
|
|
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
int STREAM_write_direct(int fd, char *buffer, int len)
|
|
{
|
|
ssize_t eff_write;
|
|
ssize_t len_write;
|
|
|
|
while (len > 0)
|
|
{
|
|
len_write = Min(len, MAX_IO);
|
|
eff_write = write(fd, buffer, len_write);
|
|
|
|
if (eff_write < len_write)
|
|
{
|
|
if (eff_write <= 0 && errno != EINTR)
|
|
return TRUE;
|
|
}
|
|
|
|
len -= eff_write;
|
|
buffer += eff_write;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
void STREAM_blocking(STREAM *stream, bool block)
|
|
{
|
|
int fd = STREAM_handle(stream);
|
|
|
|
if (fd < 0)
|
|
return;
|
|
|
|
if (block)
|
|
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_NONBLOCK);
|
|
else
|
|
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
|
|
}
|
|
|
|
bool STREAM_is_blocking(STREAM *stream)
|
|
{
|
|
int fd = STREAM_handle(stream);
|
|
|
|
if (fd < 0)
|
|
return TRUE;
|
|
|
|
return (fcntl(fd, F_GETFL) & O_NONBLOCK) == 0;
|
|
}
|