ms/applink.c

   1 /*
   2  * Copyright 2004-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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
  41 # ifdef __BORLANDC__
  42    /* _lseek in <io.h> is a function-like macro so we can't take its address */
  43 #  undef _lseek
  44 #  define _lseek lseek
  45 # endif
  46
  47 static void *app_stdin(void)
  48 {
  49     return stdin;
  50 }
  51
  52 static void *app_stdout(void)
  53 {
  54     return stdout;
  55 }
  56
  57 static void *app_stderr(void)
  58 {
  59     return stderr;
  60 }
  61
  62 static int app_feof(FILE *fp)
  63 {
  64     return feof(fp);
  65 }
  66
  67 static int app_ferror(FILE *fp)
  68 {
  69     return ferror(fp);
  70 }
  71
  72 static void app_clearerr(FILE *fp)
  73 {
  74     clearerr(fp);
  75 }
  76
  77 static int app_fileno(FILE *fp)
  78 {
  79     return _fileno(fp);
  80 }
  81
  82 static int app_fsetmod(FILE *fp, char mod)
  83 {
  84     return _setmode(_fileno(fp), mod == 'b' ? _O_BINARY : _O_TEXT);
  85 }
  86
  87 #ifdef __cplusplus
  88 extern "C" {
  89 #endif
  90
  91 __declspec(dllexport)
  92 void **
  93 # if defined(__BORLANDC__)
  94 /*
  95  * __stdcall appears to be the only way to get the name
  96  * decoration right with Borland C. Otherwise it works
  97  * purely incidentally, as we pass no parameters.
  98  */
  99 __stdcall
 100 # else
 101 __cdecl
 102 # endif
 103 OPENSSL_Applink(void)
 104 {
 105     static int once = 1;
 106     static void *OPENSSL_ApplinkTable[APPLINK_MAX + 1] =
 107         { (void *)APPLINK_MAX };
 108
 109     if (once) {
 110         OPENSSL_ApplinkTable[APPLINK_STDIN] = app_stdin;
 111         OPENSSL_ApplinkTable[APPLINK_STDOUT] = app_stdout;
 112         OPENSSL_ApplinkTable[APPLINK_STDERR] = app_stderr;
 113         OPENSSL_ApplinkTable[APPLINK_FPRINTF] = fprintf;
 114         OPENSSL_ApplinkTable[APPLINK_FGETS] = fgets;
 115         OPENSSL_ApplinkTable[APPLINK_FREAD] = fread;
 116         OPENSSL_ApplinkTable[APPLINK_FWRITE] = fwrite;
 117         OPENSSL_ApplinkTable[APPLINK_FSETMOD] = app_fsetmod;
 118         OPENSSL_ApplinkTable[APPLINK_FEOF] = app_feof;
 119         OPENSSL_ApplinkTable[APPLINK_FCLOSE] = fclose;
 120
 121         OPENSSL_ApplinkTable[APPLINK_FOPEN] = fopen;
 122         OPENSSL_ApplinkTable[APPLINK_FSEEK] = fseek;
 123         OPENSSL_ApplinkTable[APPLINK_FTELL] = ftell;
 124         OPENSSL_ApplinkTable[APPLINK_FFLUSH] = fflush;
 125         OPENSSL_ApplinkTable[APPLINK_FERROR] = app_ferror;
 126         OPENSSL_ApplinkTable[APPLINK_CLEARERR] = app_clearerr;
 127         OPENSSL_ApplinkTable[APPLINK_FILENO] = app_fileno;
 128
 129         OPENSSL_ApplinkTable[APPLINK_OPEN] = _open;
 130         OPENSSL_ApplinkTable[APPLINK_READ] = _read;
 131         OPENSSL_ApplinkTable[APPLINK_WRITE] = _write;
 132         OPENSSL_ApplinkTable[APPLINK_LSEEK] = _lseek;
 133         OPENSSL_ApplinkTable[APPLINK_CLOSE] = _close;
 134
 135         once = 0;
 136     }
 137
 138     return OPENSSL_ApplinkTable;
 139 }
 140
 141 #ifdef __cplusplus
 142 }
 143 #endif
 144 #endif