michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef prwin16_h___
michael@0: #define prwin16_h___
michael@0: 
michael@0: /*
michael@0: ** Condition use of this header on platform.
michael@0: */
michael@0: #if (defined(XP_PC) && !defined(_WIN32) && !defined(XP_OS2) && defined(MOZILLA_CLIENT)) || defined(WIN16)
michael@0: #include <stdio.h>
michael@0: 
michael@0: PR_BEGIN_EXTERN_C
michael@0: /* 
michael@0: ** Win16 stdio special case.
michael@0: ** To get stdio to work for Win16, all calls to printf() and related
michael@0: ** things must be called from the environment of the .EXE; calls to
michael@0: ** printf() from the .DLL send output to the bit-bucket.
michael@0: **
michael@0: ** To make sure that PR_fprintf(), and related functions, work correctly,
michael@0: ** the actual stream I/O to stdout, stderr, stdin must be done in the
michael@0: ** .EXE. To do this, a hack is placed in _MD_Write() such that the
michael@0: ** fd for stdio handles results in a call to the .EXE.
michael@0: **
michael@0: ** file w16stdio.c contains the functions that get called from NSPR
michael@0: ** to do the actual I/O. w16stdio.o must be statically linked with
michael@0: ** any application needing stdio for Win16.
michael@0: **
michael@0: ** The address of these functions must be made available to the .DLL
michael@0: ** so he can call back to the .EXE. To do this, function 
michael@0: ** PR_MD_RegisterW16StdioCallbacks() is called from the .EXE.
michael@0: ** The arguments are the functions defined in w16stdio.c
michael@0: ** At runtime, MD_Write() calls the registered functions, if any
michael@0: ** were registered.
michael@0: **
michael@0: ** prinit.h contains a macro PR_STDIO_INIT() that calls the registration
michael@0: ** function for Win16; For other platforms, the macro is a No-Op.
michael@0: **
michael@0: ** Note that stdio is not operational at all on Win16 GUI applications.
michael@0: ** This special case exists to provide stdio capability from the NSPR
michael@0: ** .DLL for command line applications only. NSPR's test cases are
michael@0: ** almost exclusively command line applications.
michael@0: **
michael@0: ** See also: w16io.c, w16stdio.c
michael@0: */
michael@0: typedef PRInt32 (PR_CALLBACK *PRStdinRead)( void *buf, PRInt32 amount);
michael@0: typedef PRInt32 (PR_CALLBACK *PRStdoutWrite)( void *buf, PRInt32 amount);
michael@0: typedef PRInt32 (PR_CALLBACK *PRStderrWrite)( void *buf, PRInt32 amount);
michael@0: 
michael@0: NSPR_API(PRStatus)
michael@0: PR_MD_RegisterW16StdioCallbacks( 
michael@0:     PRStdinRead inReadf,            /* i: function pointer for stdin read       */
michael@0:     PRStdoutWrite outWritef,        /* i: function pointer for stdout write     */
michael@0:     PRStderrWrite errWritef         /* i: function pointer for stderr write     */
michael@0:     );
michael@0: 
michael@0: NSPR_API(PRInt32)
michael@0: _PL_W16StdioWrite( void *buf, PRInt32 amount );
michael@0: 
michael@0: NSPR_API(PRInt32)
michael@0: _PL_W16StdioRead( void *buf, PRInt32 amount );
michael@0: 
michael@0: #define PR_STDIO_INIT() PR_MD_RegisterW16StdioCallbacks( \
michael@0:     _PL_W16StdioRead, _PL_W16StdioWrite, _PL_W16StdioWrite ); \
michael@0:     PR_INIT_CALLBACKS();
michael@0: 
michael@0: /*
michael@0: ** Win16 hackery.
michael@0: **
michael@0: */
michael@0: struct PRMethodCallbackStr {
michael@0:     int     (PR_CALLBACK *auxOutput)(const char *outputString);
michael@0:     size_t  (PR_CALLBACK *strftime)(char *s, size_t len, const char *fmt, const struct tm *p);
michael@0:     void *  (PR_CALLBACK *malloc)( size_t size );
michael@0:     void *  (PR_CALLBACK *calloc)(size_t n, size_t size );
michael@0:     void *  (PR_CALLBACK *realloc)( void* old_blk, size_t size );
michael@0:     void    (PR_CALLBACK *free)( void *ptr );
michael@0:     void *  (PR_CALLBACK *getenv)( const char *name);
michael@0:     int     (PR_CALLBACK *putenv)( const char *assoc);
michael@0: /*    void *  (PR_CALLBACK *perror)( const char *prefix ); */
michael@0: };
michael@0: 
michael@0: NSPR_API(void) PR_MDRegisterCallbacks(struct PRMethodCallbackStr *);
michael@0: 
michael@0: int PR_CALLBACK _PL_W16CallBackPuts( const char *outputString );
michael@0: size_t PR_CALLBACK _PL_W16CallBackStrftime( 
michael@0:     char *s, 
michael@0:     size_t len, 
michael@0:     const char *fmt,
michael@0:     const struct tm *p );
michael@0: void * PR_CALLBACK _PL_W16CallBackMalloc( size_t size );
michael@0: void * PR_CALLBACK _PL_W16CallBackCalloc( size_t n, size_t size );
michael@0: void * PR_CALLBACK _PL_W16CallBackRealloc( 
michael@0:     void *old_blk, 
michael@0:     size_t size );
michael@0: void   PR_CALLBACK _PL_W16CallBackFree( void *ptr );
michael@0: void * PR_CALLBACK _PL_W16CallBackGetenv( const char *name );
michael@0: int PR_CALLBACK _PL_W16CallBackPutenv( const char *assoc );
michael@0: 
michael@0: /*
michael@0: ** Hackery! 
michael@0: **
michael@0: ** These functions are provided as static link points.
michael@0: ** This is to satisfy the quick port of Gromit to NSPR 2.0
michael@0: ** ... Don't do this! ... alas, It may never go away.
michael@0: ** 
michael@0: */
michael@0: NSPR_API(int)     PR_MD_printf(const char *, ...);
michael@0: NSPR_API(void)    PR_MD_exit(int);
michael@0: NSPR_API(size_t)  PR_MD_strftime(char *, size_t, const char *, const struct tm *); 
michael@0: NSPR_API(int)     PR_MD_sscanf(const char *, const char *, ...);
michael@0: NSPR_API(void*)   PR_MD_malloc( size_t size );
michael@0: NSPR_API(void*)   PR_MD_calloc( size_t n, size_t size );
michael@0: NSPR_API(void*)   PR_MD_realloc( void* old_blk, size_t size );
michael@0: NSPR_API(void)    PR_MD_free( void *ptr );
michael@0: NSPR_API(char*)   PR_MD_getenv( const char *name );
michael@0: NSPR_API(int)     PR_MD_putenv( const char *assoc );
michael@0: NSPR_API(int)     PR_MD_fprintf(FILE *fPtr, const char *fmt, ...);
michael@0: 
michael@0: #define PR_INIT_CALLBACKS()                         \
michael@0:     {                                               \
michael@0:         static struct PRMethodCallbackStr cbf = {   \
michael@0:             _PL_W16CallBackPuts,                    \
michael@0:             _PL_W16CallBackStrftime,                \
michael@0:             _PL_W16CallBackMalloc,                  \
michael@0:             _PL_W16CallBackCalloc,                  \
michael@0:             _PL_W16CallBackRealloc,                 \
michael@0:             _PL_W16CallBackFree,                    \
michael@0:             _PL_W16CallBackGetenv,                  \
michael@0:             _PL_W16CallBackPutenv,                  \
michael@0:         };                                          \
michael@0:         PR_MDRegisterCallbacks( &cbf );             \
michael@0:     }
michael@0: 
michael@0: 
michael@0: /*
michael@0: ** Get the exception context for Win16 MFC applications threads
michael@0: */
michael@0: NSPR_API(void *) PR_W16GetExceptionContext(void);
michael@0: /*
michael@0: ** Set the exception context for Win16 MFC applications threads
michael@0: */
michael@0: NSPR_API(void) PR_W16SetExceptionContext(void *context);
michael@0: 
michael@0: PR_END_EXTERN_C
michael@0: #else
michael@0: /*
michael@0: ** For platforms other than Win16, define
michael@0: ** PR_STDIO_INIT() as a No-Op.
michael@0: */
michael@0: #define PR_STDIO_INIT()
michael@0: #endif /* WIN16 || MOZILLA_CLIENT */
michael@0: 
michael@0: #endif /* prwin16_h___ */
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