1/*
2 * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#define APPLINK_STDIN   1
11#define APPLINK_STDOUT  2
12#define APPLINK_STDERR  3
13#define APPLINK_FPRINTF 4
14#define APPLINK_FGETS   5
15#define APPLINK_FREAD   6
16#define APPLINK_FWRITE  7
17#define APPLINK_FSETMOD 8
18#define APPLINK_FEOF    9
19#define APPLINK_FCLOSE  10      /* should not be used */
20
21#define APPLINK_FOPEN   11      /* solely for completeness */
22#define APPLINK_FSEEK   12
23#define APPLINK_FTELL   13
24#define APPLINK_FFLUSH  14
25#define APPLINK_FERROR  15
26#define APPLINK_CLEARERR 16
27#define APPLINK_FILENO  17      /* to be used with below */
28
29#define APPLINK_OPEN    18      /* formally can't be used, as flags can vary */
30#define APPLINK_READ    19
31#define APPLINK_WRITE   20
32#define APPLINK_LSEEK   21
33#define APPLINK_CLOSE   22
34#define APPLINK_MAX     22      /* always same as last macro */
35
36#ifndef APPMACROS_ONLY
37# include <stdio.h>
38# include <io.h>
39# include <fcntl.h>
40
41static void *app_stdin(void)
42{
43    return stdin;
44}
45
46static void *app_stdout(void)
47{
48    return stdout;
49}
50
51static void *app_stderr(void)
52{
53    return stderr;
54}
55
56static int app_feof(FILE *fp)
57{
58    return feof(fp);
59}
60
61static int app_ferror(FILE *fp)
62{
63    return ferror(fp);
64}
65
66static void app_clearerr(FILE *fp)
67{
68    clearerr(fp);
69}
70
71static int app_fileno(FILE *fp)
72{
73    return _fileno(fp);
74}
75
76static int app_fsetmod(FILE *fp, char mod)
77{
78    return _setmode(_fileno(fp), mod == 'b' ? _O_BINARY : _O_TEXT);
79}
80
81#ifdef __cplusplus
82extern "C" {
83#endif
84
85__declspec(dllexport)
86void **
87# if defined(__BORLANDC__)
88/*
89 * __stdcall appears to be the only way to get the name
90 * decoration right with Borland C. Otherwise it works
91 * purely incidentally, as we pass no parameters.
92 */
93__stdcall
94# else
95__cdecl
96# endif
97OPENSSL_Applink(void)
98{
99    static int once = 1;
100    static void *OPENSSL_ApplinkTable[APPLINK_MAX + 1] =
101        { (void *)APPLINK_MAX };
102
103    if (once) {
104        OPENSSL_ApplinkTable[APPLINK_STDIN] = app_stdin;
105        OPENSSL_ApplinkTable[APPLINK_STDOUT] = app_stdout;
106        OPENSSL_ApplinkTable[APPLINK_STDERR] = app_stderr;
107        OPENSSL_ApplinkTable[APPLINK_FPRINTF] = fprintf;
108        OPENSSL_ApplinkTable[APPLINK_FGETS] = fgets;
109        OPENSSL_ApplinkTable[APPLINK_FREAD] = fread;
110        OPENSSL_ApplinkTable[APPLINK_FWRITE] = fwrite;
111        OPENSSL_ApplinkTable[APPLINK_FSETMOD] = app_fsetmod;
112        OPENSSL_ApplinkTable[APPLINK_FEOF] = app_feof;
113        OPENSSL_ApplinkTable[APPLINK_FCLOSE] = fclose;
114
115        OPENSSL_ApplinkTable[APPLINK_FOPEN] = fopen;
116        OPENSSL_ApplinkTable[APPLINK_FSEEK] = fseek;
117        OPENSSL_ApplinkTable[APPLINK_FTELL] = ftell;
118        OPENSSL_ApplinkTable[APPLINK_FFLUSH] = fflush;
119        OPENSSL_ApplinkTable[APPLINK_FERROR] = app_ferror;
120        OPENSSL_ApplinkTable[APPLINK_CLEARERR] = app_clearerr;
121        OPENSSL_ApplinkTable[APPLINK_FILENO] = app_fileno;
122
123        OPENSSL_ApplinkTable[APPLINK_OPEN] = _open;
124        OPENSSL_ApplinkTable[APPLINK_READ] = _read;
125        OPENSSL_ApplinkTable[APPLINK_WRITE] = _write;
126        OPENSSL_ApplinkTable[APPLINK_LSEEK] = _lseek;
127        OPENSSL_ApplinkTable[APPLINK_CLOSE] = _close;
128
129        once = 0;
130    }
131
132    return OPENSSL_ApplinkTable;
133}
134
135#ifdef __cplusplus
136}
137#endif
138#endif
139