lib/zip_source_win32a.c

/*
  zip_source_win32a.c -- create data source from Windows file (ANSI)
  Copyright (C) 1999-2019 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 <stdio.h>
#include <stdlib.h>

#include "zipint.h"
#include "zipwin32.h"

static void *_win32_strdup_a(const void *str);
static HANDLE _win32_open_a(_zip_source_win32_read_file_t *ctx);
static HANDLE _win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa);
static int _win32_rename_temp_a(_zip_source_win32_read_file_t *ctx);
static int _win32_remove_a(const void *fname);

/* clang-format off */
static _zip_source_win32_file_ops_t win32_ops_a = {
    _win32_strdup_a,
    _win32_open_a,
    _win32_create_temp_a,
    _win32_rename_temp_a,
    _win32_remove_a
};
/* clang-format on */

ZIP_EXTERN zip_source_t *
zip_source_win32a(zip_t *za, const char *fname, zip_uint64_t start, zip_int64_t len) {
    if (za == NULL)
	return NULL;

    return zip_source_win32a_create(fname, start, len, &za->error);
}


ZIP_EXTERN zip_source_t *
zip_source_win32a_create(const char *fname, zip_uint64_t start, zip_int64_t length, zip_error_t *error) {
    if (fname == NULL || length < -1) {
	zip_error_set(error, ZIP_ER_INVAL, 0);
	return NULL;
    }

    return _zip_source_win32_handle_or_name(fname, INVALID_HANDLE_VALUE, start, length, 1, NULL, &win32_ops_a, error);
}


static void *
_win32_strdup_a(const void *str) {
    return strdup((const char *)str);
}


static HANDLE
_win32_open_a(_zip_source_win32_read_file_t *ctx) {
    return CreateFileA(ctx->fname, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
}


static HANDLE
_win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa) {
    size_t len;

    len = strlen((const char *)ctx->fname) + 10;
    if (*temp == NULL) {
	if ((*temp = malloc(sizeof(char) * len)) == NULL) {
	    zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0);
	    return INVALID_HANDLE_VALUE;
	}
    }
    if (sprintf((char *)*temp, "%s.%08x", (const char *)ctx->fname, value) != len - 1) {
	return INVALID_HANDLE_VALUE;
    }

    return CreateFileA((const char *)*temp, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, sa, CREATE_NEW, FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_TEMPORARY, NULL);
}


static int
_win32_rename_temp_a(_zip_source_win32_read_file_t *ctx) {
    DWORD attributes = GetFileAttributesA(ctx->tmpname);
    if (INVALID_FILE_ATTRIBUTES == attributes)
	return -1;

    if (FILE_ATTRIBUTE_TEMPORARY & attributes) {
	if (!SetFileAttributesA(ctx->tmpname, attributes & ~FILE_ATTRIBUTE_TEMPORARY))
	    return -1;
    }

    if (!MoveFileExA(ctx->tmpname, ctx->fname, MOVEFILE_REPLACE_EXISTING))
	return -1;

    return 0;
}


static int
_win32_remove_a(const void *fname) {
    DeleteFileA((const char *)fname);
    return 0;
}