root/ext/zip/lib/zip_source_win32a.c

DEFINITIONS

1. zip_source_win32a
2. zip_source_win32a_create
3. _win32_strdup_a
4. _win32_open_a
5. _win32_create_temp_a
6. _win32_rename_temp_a
7. _win32_remove_a

   1 /*
   2 zip_source_win32a.c -- create data source from Windows file (ANSI)
   3 Copyright (C) 1999-2016 Dieter Baron and Thomas Klausner
   4 
   5 This file is part of libzip, a library to manipulate ZIP archives.
   6 The authors can be contacted at <libzip@nih.at>
   7 
   8 Redistribution and use in source and binary forms, with or without
   9 modification, are permitted provided that the following conditions
  10 are met:
  11 1. Redistributions of source code must retain the above copyright
  12 notice, this list of conditions and the following disclaimer.
  13 2. Redistributions in binary form must reproduce the above copyright
  14 notice, this list of conditions and the following disclaimer in
  15 the documentation and/or other materials provided with the
  16 distribution.
  17 3. The names of the authors may not be used to endorse or promote
  18 products derived from this software without specific prior
  19 written permission.
  20 
  21 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
  22 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
  25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  29 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  31 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 */
  33 
  34 
  35 #include <stdio.h>
  36 
  37 #include "zipint.h"
  38 #include "zipwin32.h"
  39 
  40 static void * _win32_strdup_a(const void *str);
  41 static HANDLE _win32_open_a(_zip_source_win32_read_file_t *ctx);
  42 static HANDLE _win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa);
  43 static int _win32_rename_temp_a(_zip_source_win32_read_file_t *ctx);
  44 static int _win32_remove_a(const void *fname);
  45 
  46 static _zip_source_win32_file_ops_t win32_ops_a = {
  47     _win32_strdup_a,
  48     _win32_open_a,
  49     _win32_create_temp_a,
  50     _win32_rename_temp_a,
  51     _win32_remove_a
  52 };
  53 
  54 ZIP_EXTERN zip_source_t *
  55 zip_source_win32a(zip_t *za, const char *fname, zip_uint64_t start, zip_int64_t len)
  56 {
  57     if (za == NULL)
  58         return NULL;
  59 
  60     return zip_source_win32a_create(fname, start, len, &za->error);
  61 }
  62 
  63 
  64 ZIP_EXTERN zip_source_t *
  65 zip_source_win32a_create(const char *fname, zip_uint64_t start, zip_int64_t length, zip_error_t *error)
  66 {
  67     if (fname == NULL || length < -1) {
  68         zip_error_set(error, ZIP_ER_INVAL, 0);
  69         return NULL;
  70     }
  71 
  72     return _zip_source_win32_handle_or_name(fname, INVALID_HANDLE_VALUE, start, length, 1, NULL, &win32_ops_a, error);
  73 }
  74 
  75 
  76 static void *
  77 _win32_strdup_a(const void *str)
  78 {
  79     return strdup((const char *)str);
  80 }
  81 
  82 
  83 static HANDLE
  84 _win32_open_a(_zip_source_win32_read_file_t *ctx)
  85 {
  86     return CreateFileA(ctx->fname, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  87 }
  88 
  89 
  90 static HANDLE
  91 _win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa)
  92 {
  93     int len;
  94 
  95     len = strlen((const char *)ctx->fname) + 10;
  96     if (*temp == NULL) {
  97         if ((*temp = malloc(sizeof(char) * len)) == NULL) {
  98             zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0);
  99             return INVALID_HANDLE_VALUE;
 100         }
 101     }
 102     if (sprintf((char *)*temp, "%s.%08x", (const char *)ctx->fname, value) != len - 1) {
 103         return INVALID_HANDLE_VALUE;
 104     }
 105 
 106     return CreateFileA((const char *)*temp, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, sa, CREATE_NEW, FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_TEMPORARY, NULL);
 107 }
 108 
 109 
 110 static int
 111 _win32_rename_temp_a(_zip_source_win32_read_file_t *ctx)
 112 {
 113     if (!MoveFileExA(ctx->tmpname, ctx->fname, MOVEFILE_REPLACE_EXISTING))
 114         return -1;
 115     return 0;
 116 }
 117 
 118 
 119 static int
 120 _win32_remove_a(const void *fname)
 121 {
 122     DeleteFileA((const char *)fname);
 123     return 0;
 124 }