7b01d12f31
* OPT: Optimizations in string comparison operators. * OPT: Optimizations in string allocations. * OPT: Optimizations in Left$(), Mid$(), Right$() and Len(). * OPT: Optimizations of calls to native methods when the number of arguments is fixed, and when no argument conversion is needed. * OPT: Optimizations of INPUT and LINE INPUT, by using an internal buffer instead of reading the stream one byte at a time. * BUG: Fixed the new error management. * BUG: Fixed a possible spurious error when reading a file from an archive. [GB.EVAL] * BUG: Use the same new error management than the interpreter. [GB.QT] * BUG: The DrawingArea control now should draw its border correctly without erasing its contents. git-svn-id: svn://localhost/gambas/trunk@1041 867c0c6c-44f3-4631-809d-bfa615b0a4ec
174 lines
3.1 KiB
C
174 lines
3.1 KiB
C
/***************************************************************************
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stream_arch.c
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The archive 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 __STREAM_IMPL_C
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#include "gb_common.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 <fcntl.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 <errno.h>
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#include "gbx_archive.h"
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#include "gbx_stream.h"
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static int stream_open(STREAM *stream, const char *path, int mode)
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{
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ARCHIVE_FIND find;
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if (ARCHIVE_get(NULL, path, 0, &find))
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{
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errno = ENOENT;
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return TRUE;
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}
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if (find.pos < 0)
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{
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errno = EISDIR;
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return TRUE;
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}
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if ((mode & ST_ACCESS) != ST_READ)
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{
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errno = EACCES;
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return TRUE;
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}
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stream->arch.arch = find.arch;
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stream->arch.size = find.len;
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stream->arch.start = find.pos;
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stream->arch.pos = 0;
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return FALSE;
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}
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static int stream_close(STREAM *stream)
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{
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return FALSE;
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}
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static int stream_read(STREAM *stream, char *buffer, int len)
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{
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boolean strip = FALSE;
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int max;
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max = stream->arch.size - stream->arch.pos;
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if (len > max)
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{
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strip = TRUE;
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len = max;
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errno = 0;
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}
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if (ARCHIVE_read(stream->arch.arch, stream->arch.start + stream->arch.pos, buffer, len))
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strip = TRUE;
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stream->arch.pos += len;
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STREAM_eff_read = len;
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return strip;
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}
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static int stream_write(STREAM *stream, char *buffer, int len)
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{
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return TRUE;
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}
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static int stream_seek(STREAM *stream, int64_t pos, int whence)
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{
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int64_t new_pos;
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switch(whence)
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{
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case SEEK_SET:
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new_pos = pos;
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break;
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case SEEK_CUR:
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new_pos = stream->arch.pos + pos;
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break;
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case SEEK_END:
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new_pos = stream->arch.size - pos;
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break;
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default:
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return TRUE;
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}
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if (new_pos < 0 || new_pos > stream->arch.size)
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return TRUE;
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stream->arch.pos = (int)new_pos;
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return FALSE;
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}
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#define stream_getchar NULL
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static int stream_tell(STREAM *stream, int64_t *pos)
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{
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*pos = stream->arch.pos;
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return FALSE;
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}
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static int stream_flush(STREAM *stream)
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{
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return FALSE;
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}
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static int stream_eof(STREAM *stream)
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{
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return (stream->arch.pos >= stream->arch.size);
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}
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static int stream_lof(STREAM *stream, int64_t *len)
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{
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*len = stream->arch.size;
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return FALSE;
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}
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static int stream_handle(STREAM *stream)
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{
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return -1;
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}
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DECLARE_STREAM(STREAM_arch);
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