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1.1 root 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___ */
186:
187:
188:
189:
190:
191:
192:
193:
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