third_party/npapi/npspy/extern/nspr/prwin16.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /*
   3  * The contents of this file are subject to the Mozilla Public
   4  * License Version 1.1 (the "License"); you may not use this file
   5  * except in compliance with the License. You may obtain a copy of
   6  * the License at http://www.mozilla.org/MPL/
   7  *
   8  * Software distributed under the License is distributed on an "AS
   9  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  10  * implied. See the License for the specific language governing
  11  * rights and limitations under the License.
  12  *
  13  * The Original Code is the Netscape Portable Runtime (NSPR).
  14  *
  15  * The Initial Developer of the Original Code is Netscape
  16  * Communications Corporation.  Portions created by Netscape are
  17  * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
  18  * Rights Reserved.
  19  *
  20  * Contributor(s):
  21  *
  22  * Alternatively, the contents of this file may be used under the
  23  * terms of the GNU General Public License Version 2 or later (the
  24  * "GPL"), in which case the provisions of the GPL are applicable
  25  * instead of those above.  If you wish to allow use of your
  26  * version of this file only under the terms of the GPL and not to
  27  * allow others to use your version of this file under the MPL,
  28  * indicate your decision by deleting the provisions above and
  29  * replace them with the notice and other provisions required by
  30  * the GPL.  If you do not delete the provisions above, a recipient
  31  * may use your version of this file under either the MPL or the
  32  * GPL.
  33  */
  34
  35 #ifndef prwin16_h___
  36 #define prwin16_h___
  37
  38 /*
  39 ** Condition use of this header on platform.
  40 */
  41 #if (defined(XP_PC) && !defined(_WIN32) && !defined(XP_OS2) && defined(MOZILLA_CLIENT)) || defined(WIN16)
  42 #include <stdio.h>
  43
  44 PR_BEGIN_EXTERN_C
  45 /*
  46 ** Win16 stdio special case.
  47 ** To get stdio to work for Win16, all calls to printf() and related
  48 ** things must be called from the environment of the .EXE; calls to
  49 ** printf() from the .DLL send output to the bit-bucket.
  50 **
  51 ** To make sure that PR_fprintf(), and related functions, work correctly,
  52 ** the actual stream I/O to stdout, stderr, stdin must be done in the
  53 ** .EXE. To do this, a hack is placed in _MD_Write() such that the
  54 ** fd for stdio handles results in a call to the .EXE.
  55 **
  56 ** file w16stdio.c contains the functions that get called from NSPR
  57 ** to do the actual I/O. w16stdio.o must be statically linked with
  58 ** any application needing stdio for Win16.
  59 **
  60 ** The address of these functions must be made available to the .DLL
  61 ** so he can call back to the .EXE. To do this, function
  62 ** PR_MD_RegisterW16StdioCallbacks() is called from the .EXE.
  63 ** The arguments are the functions defined in w16stdio.c
  64 ** At runtime, MD_Write() calls the registered functions, if any
  65 ** were registered.
  66 **
  67 ** prinit.h contains a macro PR_STDIO_INIT() that calls the registration
  68 ** function for Win16; For other platforms, the macro is a No-Op.
  69 **
  70 ** Note that stdio is not operational at all on Win16 GUI applications.
  71 ** This special case exists to provide stdio capability from the NSPR
  72 ** .DLL for command line applications only. NSPR's test cases are
  73 ** almost exclusively command line applications.
  74 **
  75 ** See also: w16io.c, w16stdio.c
  76 */
  77 typedef PRInt32 (PR_CALLBACK *PRStdinRead)( void *buf, PRInt32 amount);
  78 typedef PRInt32 (PR_CALLBACK *PRStdoutWrite)( void *buf, PRInt32 amount);
  79 typedef PRInt32 (PR_CALLBACK *PRStderrWrite)( void *buf, PRInt32 amount);
  80
  81 NSPR_API(PRStatus)
  82 PR_MD_RegisterW16StdioCallbacks(
  83     PRStdinRead inReadf,            /* i: function pointer for stdin read       */
  84     PRStdoutWrite outWritef,        /* i: function pointer for stdout write     */
  85     PRStderrWrite errWritef         /* i: function pointer for stderr write     */
  86     );
  87
  88 NSPR_API(PRInt32)
  89 _PL_W16StdioWrite( void *buf, PRInt32 amount );
  90
  91 NSPR_API(PRInt32)
  92 _PL_W16StdioRead( void *buf, PRInt32 amount );
  93
  94 #define PR_STDIO_INIT() PR_MD_RegisterW16StdioCallbacks( \
  95     _PL_W16StdioRead, _PL_W16StdioWrite, _PL_W16StdioWrite ); \
  96     PR_INIT_CALLBACKS();
  97
  98 /*
  99 ** Win16 hackery.
 100 **
 101 */
 102 struct PRMethodCallbackStr {
 103     int     (PR_CALLBACK *auxOutput)(const char *outputString);
 104     size_t  (PR_CALLBACK *strftime)(char *s, size_t len, const char *fmt, const struct tm *p);
 105     void *  (PR_CALLBACK *malloc)( size_t size );
 106     void *  (PR_CALLBACK *calloc)(size_t n, size_t size );
 107     void *  (PR_CALLBACK *realloc)( void* old_blk, size_t size );
 108     void    (PR_CALLBACK *free)( void *ptr );
 109     void *  (PR_CALLBACK *getenv)( const char *name);
 110     int     (PR_CALLBACK *putenv)( const char *assoc);
 111 /*    void *  (PR_CALLBACK *perror)( const char *prefix ); */
 112 };
 113
 114 NSPR_API(void) PR_MDRegisterCallbacks(struct PRMethodCallbackStr *);
 115
 116 int PR_CALLBACK _PL_W16CallBackPuts( const char *outputString );
 117 size_t PR_CALLBACK _PL_W16CallBackStrftime(
 118     char *s,
 119     size_t len,
 120     const char *fmt,
 121     const struct tm *p );
 122 void * PR_CALLBACK _PL_W16CallBackMalloc( size_t size );
 123 void * PR_CALLBACK _PL_W16CallBackCalloc( size_t n, size_t size );
 124 void * PR_CALLBACK _PL_W16CallBackRealloc(
 125     void *old_blk,
 126     size_t size );
 127 void   PR_CALLBACK _PL_W16CallBackFree( void *ptr );
 128 void * PR_CALLBACK _PL_W16CallBackGetenv( const char *name );
 129 int PR_CALLBACK _PL_W16CallBackPutenv( const char *assoc );
 130
 131 /*
 132 ** Hackery!
 133 **
 134 ** These functions are provided as static link points.
 135 ** This is to satisfy the quick port of Gromit to NSPR 2.0
 136 ** ... Don't do this! ... alas, It may never go away.
 137 **
 138 */
 139 NSPR_API(int)     PR_MD_printf(const char *, ...);
 140 NSPR_API(void)    PR_MD_exit(int);
 141 NSPR_API(size_t)  PR_MD_strftime(char *, size_t, const char *, const struct tm *);
 142 NSPR_API(int)     PR_MD_sscanf(const char *, const char *, ...);
 143 NSPR_API(void*)   PR_MD_malloc( size_t size );
 144 NSPR_API(void*)   PR_MD_calloc( size_t n, size_t size );
 145 NSPR_API(void*)   PR_MD_realloc( void* old_blk, size_t size );
 146 NSPR_API(void)    PR_MD_free( void *ptr );
 147 NSPR_API(char*)   PR_MD_getenv( const char *name );
 148 NSPR_API(int)     PR_MD_putenv( const char *assoc );
 149 NSPR_API(int)     PR_MD_fprintf(FILE *fPtr, const char *fmt, ...);
 150
 151 #define PR_INIT_CALLBACKS()                         \
 152     {                                               \
 153         static struct PRMethodCallbackStr cbf = {   \
 154             _PL_W16CallBackPuts,                    \
 155             _PL_W16CallBackStrftime,                \
 156             _PL_W16CallBackMalloc,                  \
 157             _PL_W16CallBackCalloc,                  \
 158             _PL_W16CallBackRealloc,                 \
 159             _PL_W16CallBackFree,                    \
 160             _PL_W16CallBackGetenv,                  \
 161             _PL_W16CallBackPutenv,                  \
 162         };                                          \
 163         PR_MDRegisterCallbacks( &cbf );             \
 164     }
 165
 166
 167 /*
 168 ** Get the exception context for Win16 MFC applications threads
 169 */
 170 NSPR_API(void *) PR_W16GetExceptionContext(void);
 171 /*
 172 ** Set the exception context for Win16 MFC applications threads
 173 */
 174 NSPR_API(void) PR_W16SetExceptionContext(void *context);
 175
 176 PR_END_EXTERN_C
 177 #else
 178 /*
 179 ** For platforms other than Win16, define
 180 ** PR_STDIO_INIT() as a No-Op.
 181 */
 182 #define PR_STDIO_INIT()
 183 #endif /* WIN16 || MOZILLA_CLIENT */
 184
 185 #endif /* prwin16_h___ */
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