diff options
author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-06-26 22:51:27 +0200 |
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committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-07-08 19:17:35 +0200 |
commit | 359d71e90050a8b83f7bc7d2ecd4ff29c477cc22 (patch) | |
tree | df2b7a585b78e6776446d4ca9be62a22db27f0a7 /lib/fstream/istream.c | |
parent | 2087cc237cd0fe1ed29ebf891648bacb46f4833b (diff) |
Cleanup: rename libfstream to libio, split headers
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/fstream/istream.c')
-rw-r--r-- | lib/fstream/istream.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/lib/fstream/istream.c b/lib/fstream/istream.c deleted file mode 100644 index 6318a23..0000000 --- a/lib/fstream/istream.c +++ /dev/null @@ -1,91 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * istream.c - * - * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> - */ -#include "internal.h" - - -sqfs_s32 istream_read(istream_t *strm, void *data, size_t size) -{ - sqfs_s32 total = 0; - size_t diff; - - if (size > 0x7FFFFFFF) - size = 0x7FFFFFFF; - - while (size > 0) { - if (strm->buffer_offset >= strm->buffer_used) { - if (istream_precache(strm)) - return -1; - - if (strm->buffer_used == 0) - break; - } - - diff = strm->buffer_used - strm->buffer_offset; - if (diff > size) - diff = size; - - memcpy(data, strm->buffer + strm->buffer_offset, diff); - data = (char *)data + diff; - strm->buffer_offset += diff; - size -= diff; - total += diff; - } - - return total; -} - -int istream_precache(istream_t *strm) -{ - if (strm->buffer_offset >= strm->buffer_used) { - strm->buffer_offset = 0; - strm->buffer_used = 0; - } else if (strm->buffer_offset > 0) { - memmove(strm->buffer, - strm->buffer + strm->buffer_offset, - strm->buffer_used - strm->buffer_offset); - - strm->buffer_used -= strm->buffer_offset; - strm->buffer_offset = 0; - } - - if (strm->eof) - return 0; - - return strm->precache(strm); -} - -const char *istream_get_filename(istream_t *strm) -{ - return strm->get_filename(strm); -} - -int istream_skip(istream_t *strm, sqfs_u64 size) -{ - size_t diff; - - while (size > 0) { - if (strm->buffer_offset >= strm->buffer_used) { - if (istream_precache(strm)) - return -1; - - if (strm->buffer_used == 0) { - fprintf(stderr, "%s: unexpected end-of-file\n", - strm->get_filename(strm)); - return -1; - } - } - - diff = strm->buffer_used - strm->buffer_offset; - if ((sqfs_u64)diff > size) - diff = size; - - strm->buffer_offset += diff; - size -= diff; - } - - return 0; -} |