| /* |
| zip_file_replace.c -- replace file via callback function |
| Copyright (C) 1999-2021 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> |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| 3. The names of the authors may not be used to endorse or promote |
| products derived from this software without specific prior |
| written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS |
| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include "zipint.h" |
| |
| |
| ZIP_EXTERN int |
| zip_file_replace(zip_t *za, zip_uint64_t idx, zip_source_t *source, zip_flags_t flags) { |
| if (idx >= za->nentry || source == NULL) { |
| zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
| return -1; |
| } |
| |
| if (_zip_file_replace(za, idx, NULL, source, flags) == -1) |
| return -1; |
| |
| return 0; |
| } |
| |
| |
| /* NOTE: Signed due to -1 on error. See zip_add.c for more details. */ |
| |
| zip_int64_t |
| _zip_file_replace(zip_t *za, zip_uint64_t idx, const char *name, zip_source_t *source, zip_flags_t flags) { |
| zip_uint64_t za_nentry_prev; |
| |
| if (ZIP_IS_RDONLY(za)) { |
| zip_error_set(&za->error, ZIP_ER_RDONLY, 0); |
| return -1; |
| } |
| |
| za_nentry_prev = za->nentry; |
| if (idx == ZIP_UINT64_MAX) { |
| zip_int64_t i = -1; |
| |
| if (flags & ZIP_FL_OVERWRITE) |
| i = _zip_name_locate(za, name, flags, NULL); |
| |
| if (i == -1) { |
| /* create and use new entry, used by zip_add */ |
| if ((i = _zip_add_entry(za)) < 0) |
| return -1; |
| } |
| idx = (zip_uint64_t)i; |
| } |
| |
| if (name && _zip_set_name(za, idx, name, flags) != 0) { |
| if (za->nentry != za_nentry_prev) { |
| _zip_entry_finalize(za->entry + idx); |
| za->nentry = za_nentry_prev; |
| } |
| return -1; |
| } |
| |
| /* does not change any name related data, so we can do it here; |
| * needed for a double add of the same file name */ |
| _zip_unchange_data(za->entry + idx); |
| |
| if (za->entry[idx].orig != NULL && (za->entry[idx].changes == NULL || (za->entry[idx].changes->changed & ZIP_DIRENT_COMP_METHOD) == 0)) { |
| if (za->entry[idx].changes == NULL) { |
| if ((za->entry[idx].changes = _zip_dirent_clone(za->entry[idx].orig)) == NULL) { |
| zip_error_set(&za->error, ZIP_ER_MEMORY, 0); |
| return -1; |
| } |
| } |
| |
| za->entry[idx].changes->comp_method = ZIP_CM_REPLACED_DEFAULT; |
| za->entry[idx].changes->changed |= ZIP_DIRENT_COMP_METHOD; |
| } |
| |
| za->entry[idx].source = source; |
| |
| return (zip_int64_t)idx; |
| } |