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8e9db35f PB |
1 | /* @(#) pf_io.c 96/12/23 1.12 */ |
2 | /*************************************************************** | |
3 | ** I/O subsystem for PForth based on 'C' | |
4 | ** | |
5 | ** Author: Phil Burk | |
6 | ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom | |
7 | ** | |
8 | ** The pForth software code is dedicated to the public domain, | |
9 | ** and any third party may reproduce, distribute and modify | |
10 | ** the pForth software code or any derivative works thereof | |
11 | ** without any compensation or license. The pForth software | |
12 | ** code is provided on an "as is" basis without any warranty | |
13 | ** of any kind, including, without limitation, the implied | |
14 | ** warranties of merchantability and fitness for a particular | |
15 | ** purpose and their equivalents under the laws of any jurisdiction. | |
16 | ** | |
17 | **************************************************************** | |
18 | ** 941004 PLB Extracted IO calls from pforth_main.c | |
19 | ***************************************************************/ | |
20 | ||
21 | #include "pf_all.h" | |
22 | ||
23 | ||
24 | /*************************************************************** | |
25 | ** Initialize I/O system. | |
26 | */ | |
27 | void ioInit( void ) | |
28 | { | |
29 | /* System dependant terminal initialization. */ | |
30 | sdTerminalInit(); | |
31 | } | |
32 | void ioTerm( void ) | |
33 | { | |
34 | sdTerminalTerm(); | |
35 | } | |
36 | ||
37 | /*************************************************************** | |
38 | ** Send single character to output stream. | |
39 | */ | |
40 | void ioEmit( char c ) | |
41 | { | |
42 | cell_t Result; | |
43 | ||
44 | Result = sdTerminalOut(c); | |
45 | if( Result < 0 ) EXIT(1); | |
46 | ||
47 | if( gCurrentTask ) | |
48 | { | |
49 | if(c == '\n') | |
50 | { | |
51 | gCurrentTask->td_OUT = 0; | |
52 | sdTerminalFlush(); | |
53 | } | |
54 | else | |
55 | { | |
56 | gCurrentTask->td_OUT++; | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
61 | /*************************************************************** | |
62 | ** Send an entire string.. | |
63 | */ | |
64 | void ioType( const char *s, cell_t n ) | |
65 | { | |
66 | cell_t i; | |
67 | ||
68 | for( i=0; i<n; i++) | |
69 | { | |
70 | ioEmit ( *s++ ); | |
71 | } | |
72 | } | |
73 | ||
74 | /*************************************************************** | |
75 | ** Return single character from input device, always keyboard. | |
76 | */ | |
77 | cell_t ioKey( void ) | |
78 | { | |
79 | cell_t c; | |
80 | sdEnableInput(); | |
81 | c = sdTerminalIn(); | |
82 | sdDisableInput(); | |
83 | return c; | |
84 | } | |
85 | ||
86 | /************************************************************** | |
87 | ** Receive line from keyboard. | |
88 | ** Return number of characters enterred. | |
89 | */ | |
90 | #define SPACE (0x20) | |
91 | #define BACKSPACE (0x08) | |
92 | #define DELETE (0x7F) | |
93 | cell_t ioAccept( char *buffer, cell_t maxChars ) | |
94 | { | |
95 | int c; | |
96 | int len; | |
97 | char *p; | |
98 | ||
99 | DBUGX(("ioAccept(0x%x, 0x%x)\n", buffer, len )); | |
100 | ||
101 | sdEnableInput(); | |
102 | ||
103 | p = buffer; | |
104 | len = 0; | |
105 | while(len < maxChars) | |
106 | { | |
107 | c = sdTerminalIn(); | |
108 | switch(c) | |
109 | { | |
110 | case '\r': | |
111 | case '\n': | |
112 | DBUGX(("EOL\n")); | |
113 | goto gotline; | |
114 | break; | |
115 | ||
116 | case BACKSPACE: | |
117 | case DELETE: | |
118 | if( len > 0 ) /* Don't go beyond beginning of line. */ | |
119 | { | |
120 | EMIT(BACKSPACE); | |
121 | EMIT(' '); | |
122 | EMIT(BACKSPACE); | |
123 | p--; | |
124 | len--; | |
125 | } | |
126 | break; | |
127 | ||
128 | default: | |
129 | sdTerminalEcho( (char) c ); | |
130 | *p++ = (char) c; | |
131 | len++; | |
132 | break; | |
133 | } | |
134 | ||
135 | } | |
136 | ||
137 | gotline: | |
138 | sdDisableInput(); | |
139 | sdTerminalEcho( SPACE ); | |
140 | ||
141 | /* NUL terminate line to simplify printing when debugging. */ | |
142 | if( len < maxChars ) p[len] = '\0'; | |
143 | ||
144 | return len; | |
145 | } | |
146 | ||
147 | #define UNIMPLEMENTED(name) { MSG(name); MSG("is unimplemented!\n"); } | |
148 | ||
149 | ||
150 | /***********************************************************************************/ | |
151 | /*********** File I/O **************************************************************/ | |
152 | /***********************************************************************************/ | |
153 | #ifdef PF_NO_FILEIO | |
154 | ||
155 | /* Provide stubs for standard file I/O */ | |
156 | ||
157 | FileStream *PF_STDIN; | |
158 | FileStream *PF_STDOUT; | |
159 | ||
160 | cell_t sdInputChar( FileStream *stream ) | |
161 | { | |
162 | UNIMPLEMENTED("sdInputChar"); | |
163 | TOUCH(stream); | |
164 | return -1; | |
165 | } | |
166 | ||
167 | FileStream *sdOpenFile( const char *FileName, const char *Mode ) | |
168 | { | |
169 | UNIMPLEMENTED("sdOpenFile"); | |
170 | TOUCH(FileName); | |
171 | TOUCH(Mode); | |
172 | return NULL; | |
173 | } | |
174 | cell_t sdFlushFile( FileStream * Stream ) | |
175 | { | |
176 | TOUCH(Stream); | |
177 | return 0; | |
178 | } | |
179 | cell_t sdReadFile( void *ptr, cell_t Size, int32_t nItems, FileStream * Stream ) | |
180 | { | |
181 | UNIMPLEMENTED("sdReadFile"); | |
182 | TOUCH(ptr); | |
183 | TOUCH(Size); | |
184 | TOUCH(nItems); | |
185 | TOUCH(Stream); | |
186 | return 0; | |
187 | } | |
188 | cell_t sdWriteFile( void *ptr, cell_t Size, int32_t nItems, FileStream * Stream ) | |
189 | { | |
190 | UNIMPLEMENTED("sdWriteFile"); | |
191 | TOUCH(ptr); | |
192 | TOUCH(Size); | |
193 | TOUCH(nItems); | |
194 | TOUCH(Stream); | |
195 | return 0; | |
196 | } | |
197 | cell_t sdSeekFile( FileStream * Stream, cell_t Position, int32_t Mode ) | |
198 | { | |
199 | UNIMPLEMENTED("sdSeekFile"); | |
200 | TOUCH(Stream); | |
201 | TOUCH(Position); | |
202 | TOUCH(Mode); | |
203 | return 0; | |
204 | } | |
205 | cell_t sdTellFile( FileStream * Stream ) | |
206 | { | |
207 | UNIMPLEMENTED("sdTellFile"); | |
208 | TOUCH(Stream); | |
209 | return 0; | |
210 | } | |
211 | cell_t sdCloseFile( FileStream * Stream ) | |
212 | { | |
213 | UNIMPLEMENTED("sdCloseFile"); | |
214 | TOUCH(Stream); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | FileStream *sdDeleteFile( const char *FileName ) | |
219 | { | |
220 | UNIMPLEMENTED("sdDeleteFile"); | |
221 | TOUCH(FileName); | |
222 | return NULL; | |
223 | } | |
224 | #endif | |
225 |