diff options
Diffstat (limited to 'src/Common/libzip/zip_source_tell.c')
| -rw-r--r-- | src/Common/libzip/zip_source_tell.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/Common/libzip/zip_source_tell.c b/src/Common/libzip/zip_source_tell.c index da13cf51..49057ce5 100644 --- a/src/Common/libzip/zip_source_tell.c +++ b/src/Common/libzip/zip_source_tell.c @@ -1,9 +1,9 @@ /* zip_source_tell.c -- report current offset - Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner + Copyright (C) 2014-2021 Dieter Baron and Thomas Klausner This file is part of libzip, a library to manipulate ZIP archives. - The authors can be contacted at <libzip@nih.at> + The authors can be contacted at <info@libzip.org> Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions @@ -38,11 +38,19 @@ ZIP_EXTERN zip_int64_t zip_source_tell(zip_source_t *src) { if (src->source_closed) { - return -1; + return -1; } if (!ZIP_SOURCE_IS_OPEN_READING(src)) { - zip_error_set(&src->error, ZIP_ER_INVAL, 0); - return -1; + zip_error_set(&src->error, ZIP_ER_INVAL, 0); + return -1; + } + + if ((src->supports & (ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_TELL) | ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_SEEK))) == 0) { + if (src->bytes_read > ZIP_INT64_MAX) { + zip_error_set(&src->error, ZIP_ER_TELL, EOVERFLOW); + return -1; + } + return (zip_int64_t)src->bytes_read; } return _zip_source_call(src, NULL, 0, ZIP_SOURCE_TELL); |