text: /*
   * Copyright (c) 2021 HopeBayTech.
   *
   * This file is part of Tera.
   * See https://github.com/HopeBayMobile for further info.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  
  #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;
  }
  