/*************************************************************************** gbx_stream_arch.c (c) 2000-2017 BenoƮt Minisini This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ***************************************************************************/ #define __STREAM_IMPL_C #include "gb_common.h" #include "gb_error.h" #include "gbx_value.h" #include "gb_limit.h" #include #include #include #include #include #include #include "gbx_archive.h" #include "gbx_stream.h" static int stream_open(STREAM *stream, const char *path, int mode) { ARCHIVE_FIND find; if (ARCHIVE_get(NULL, &path, &find)) { errno = ENOENT; return TRUE; } if (find.pos < 0) { errno = EISDIR; return TRUE; } if ((mode & ST_ACCESS) != ST_READ) { errno = EACCES; return TRUE; } stream->common.available_now = TRUE; stream->arch.arch = find.arch; stream->arch.size = find.len; stream->arch.start = find.pos; stream->arch.pos = 0; return FALSE; } static int stream_close(STREAM *stream) { return FALSE; } static int stream_read(STREAM *stream, char *buffer, int len) { bool strip = FALSE; int max; max = stream->arch.size - stream->arch.pos; if (len > max) { strip = TRUE; len = max; errno = 0; } if (ARCHIVE_read(stream->arch.arch, stream->arch.start + stream->arch.pos, buffer, len)) strip = TRUE; stream->arch.pos += len; STREAM_eff_read = len; return strip; } static int stream_write(STREAM *stream, char *buffer, int len) { return TRUE; } static int stream_seek(STREAM *stream, int64_t pos, int whence) { int64_t new_pos; switch(whence) { case SEEK_SET: new_pos = pos; break; case SEEK_CUR: new_pos = stream->arch.pos + pos; break; case SEEK_END: new_pos = stream->arch.size - pos; break; default: return TRUE; } if (new_pos < 0 || new_pos > stream->arch.size) return TRUE; stream->arch.pos = (int)new_pos; return FALSE; } #define stream_getchar NULL static int stream_tell(STREAM *stream, int64_t *pos) { *pos = stream->arch.pos; return FALSE; } static int stream_flush(STREAM *stream) { return FALSE; } static int stream_eof(STREAM *stream) { return (stream->arch.pos >= stream->arch.size); } static int stream_lof(STREAM *stream, int64_t *len) { *len = stream->arch.size; return FALSE; } static int stream_handle(STREAM *stream) { return -1; } DECLARE_STREAM(STREAM_arch);