First Commit

3rdparty/libzip/lib/zip_file_replace.c

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+/*
+  zip_file_replace.c -- replace file via callback function
+  Copyright (C) 1999-2024 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  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
+  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;
+    }
+
+    /* delete all extra fields - these are usually data that are
+     * strongly coupled with the original data */
+    if (zip_file_extra_field_delete(za, idx, ZIP_EXTRA_FIELD_ALL, ZIP_FL_CENTRAL | ZIP_FL_LOCAL) < 0) {
+        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;
+}