140 lines
2.9 KiB
C
140 lines
2.9 KiB
C
/***************************************************************************
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gbx_stream_string.c
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(c) 2000-2017 Benoît Minisini <benoit.minisini@gambas-basic.org>
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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 2, 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., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, 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_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 <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 <signal.h>
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#include <setjmp.h>
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#include "gbx_string.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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stream->string.buffer = NULL;
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stream->common.available_now = TRUE;
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stream->string.size = 0;
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stream->string.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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STRING_unref(&stream->string.buffer);
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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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int max;
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max = stream->string.size - stream->string.pos;
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if (len > max)
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{
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len = max;
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errno = 0;
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}
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if (len > 0)
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memcpy(buffer, stream->string.buffer + stream->string.pos, len);
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stream->string.pos += len;
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return len;
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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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if ((stream->common.mode & GB_ST_WRITE) == 0)
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THROW(E_ACCESS);
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stream->string.buffer = STRING_add(stream->string.buffer, buffer, len);
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stream->string.size += len;
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stream->string.pos = stream->string.size;
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return len;
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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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int ipos = (int)pos;
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if (pos != (int64_t)ipos || ipos < 0 || ipos > stream->string.size)
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return TRUE;
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stream->string.pos = ipos;
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return FALSE;
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}
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static int stream_tell(STREAM *stream, int64_t *pos)
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{
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*pos = (int64_t)stream->string.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->string.pos >= stream->string.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 = STRING_length(stream->string.buffer);
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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_string);
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