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
44PR_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*/
77typedef PRInt32 (PR_CALLBACK *PRStdinRead)( void *buf, PRInt32 amount);
78typedef PRInt32 (PR_CALLBACK *PRStdoutWrite)( void *buf, PRInt32 amount);
79typedef PRInt32 (PR_CALLBACK *PRStderrWrite)( void *buf, PRInt32 amount);
80
81NSPR_API(PRStatus)
82PR_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
88NSPR_API(PRInt32)
89_PL_W16StdioWrite( void *buf, PRInt32 amount );
90
91NSPR_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*/
102struct 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
114NSPR_API(void) PR_MDRegisterCallbacks(struct PRMethodCallbackStr *);
115
116int PR_CALLBACK _PL_W16CallBackPuts( const char *outputString );
117size_t PR_CALLBACK _PL_W16CallBackStrftime(
118    char *s,
119    size_t len,
120    const char *fmt,
121    const struct tm *p );
122void * PR_CALLBACK _PL_W16CallBackMalloc( size_t size );
123void * PR_CALLBACK _PL_W16CallBackCalloc( size_t n, size_t size );
124void * PR_CALLBACK _PL_W16CallBackRealloc(
125    void *old_blk,
126    size_t size );
127void   PR_CALLBACK _PL_W16CallBackFree( void *ptr );
128void * PR_CALLBACK _PL_W16CallBackGetenv( const char *name );
129int 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*/
139NSPR_API(int)     PR_MD_printf(const char *, ...);
140NSPR_API(void)    PR_MD_exit(int);
141NSPR_API(size_t)  PR_MD_strftime(char *, size_t, const char *, const struct tm *);
142NSPR_API(int)     PR_MD_sscanf(const char *, const char *, ...);
143NSPR_API(void*)   PR_MD_malloc( size_t size );
144NSPR_API(void*)   PR_MD_calloc( size_t n, size_t size );
145NSPR_API(void*)   PR_MD_realloc( void* old_blk, size_t size );
146NSPR_API(void)    PR_MD_free( void *ptr );
147NSPR_API(char*)   PR_MD_getenv( const char *name );
148NSPR_API(int)     PR_MD_putenv( const char *assoc );
149NSPR_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*/
170NSPR_API(void *) PR_W16GetExceptionContext(void);
171/*
172** Set the exception context for Win16 MFC applications threads
173*/
174NSPR_API(void) PR_W16SetExceptionContext(void *context);
175
176PR_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___ */
186
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