Commit | Line | Data |
---|---|---|
7c658c65 B |
1 | # |
2 | /* | |
3 | * UNIX shell | |
4 | */ | |
5 | ||
6 | ||
7 | #define BYTESPERWORD (sizeof(char *)) | |
8 | ||
9 | TYPE char CHAR; | |
10 | TYPE char BOOL; | |
11 | TYPE int UFD; | |
12 | TYPE int INT; | |
13 | TYPE float REAL; | |
14 | TYPE char *ADDRESS; | |
15 | TYPE long int L_INT; | |
16 | TYPE int VOID; | |
17 | TYPE unsigned POS; | |
18 | TYPE char *STRING; | |
19 | TYPE char MSG[]; | |
20 | TYPE int PIPE[]; | |
21 | TYPE char *STKPTR; | |
22 | TYPE char *BYTPTR; | |
23 | ||
24 | STRUCT stat STATBUF; /* defined in /usr/sys/stat.h */ | |
25 | STRUCT blk *BLKPTR; | |
26 | STRUCT fileblk FILEBLK; | |
27 | STRUCT filehdr FILEHDR; | |
28 | STRUCT fileblk *FILE; | |
29 | STRUCT trenod *TREPTR; | |
30 | STRUCT forknod *FORKPTR; | |
31 | STRUCT comnod *COMPTR; | |
32 | STRUCT swnod *SWPTR; | |
33 | STRUCT regnod *REGPTR; | |
34 | STRUCT parnod *PARPTR; | |
35 | STRUCT ifnod *IFPTR; | |
36 | STRUCT whnod *WHPTR; | |
37 | STRUCT fornod *FORPTR; | |
38 | STRUCT lstnod *LSTPTR; | |
39 | STRUCT argnod *ARGPTR; | |
40 | STRUCT dolnod *DOLPTR; | |
41 | STRUCT ionod *IOPTR; | |
42 | STRUCT namnod NAMNOD; | |
43 | STRUCT namnod *NAMPTR; | |
44 | STRUCT sysnod SYSNOD; | |
45 | STRUCT sysnod *SYSPTR; | |
46 | STRUCT sysnod SYSTAB[]; | |
47 | #define NIL ((char*)0) | |
48 | ||
49 | ||
50 | /* the following nonsense is required | |
51 | * because casts turn an Lvalue | |
52 | * into an Rvalue so two cheats | |
53 | * are necessary, one for each context. | |
54 | */ | |
55 | union { int _cheat;}; | |
56 | #define Lcheat(a) ((a)._cheat) | |
57 | #define Rcheat(a) ((int)(a)) | |
58 | ||
59 | ||
60 | /* address puns for storage allocation */ | |
61 | UNION { | |
62 | FORKPTR _forkptr; | |
63 | COMPTR _comptr; | |
64 | PARPTR _parptr; | |
65 | IFPTR _ifptr; | |
66 | WHPTR _whptr; | |
67 | FORPTR _forptr; | |
68 | LSTPTR _lstptr; | |
69 | BLKPTR _blkptr; | |
70 | NAMPTR _namptr; | |
71 | BYTPTR _bytptr; | |
72 | } address; | |
73 | ||
74 | ||
75 | /* for functions that do not return values */ | |
76 | struct void {INT vvvvvvvv;}; | |
77 | ||
78 | ||
79 | /* heap storage */ | |
80 | struct blk { | |
81 | BLKPTR word; | |
82 | }; | |
83 | ||
84 | #define BUFSIZ 64 | |
85 | struct fileblk { | |
86 | UFD fdes; | |
87 | POS flin; | |
88 | BOOL feof; | |
89 | CHAR fsiz; | |
90 | STRING fnxt; | |
91 | STRING fend; | |
92 | STRING *feval; | |
93 | FILE fstak; | |
94 | CHAR fbuf[BUFSIZ]; | |
95 | }; | |
96 | ||
97 | /* for files not used with file descriptors */ | |
98 | struct filehdr { | |
99 | UFD fdes; | |
100 | POS flin; | |
101 | BOOL feof; | |
102 | CHAR fsiz; | |
103 | STRING fnxt; | |
104 | STRING fend; | |
105 | STRING *feval; | |
106 | FILE fstak; | |
107 | CHAR _fbuf[1]; | |
108 | }; | |
109 | ||
110 | struct sysnod { | |
111 | STRING sysnam; | |
112 | INT sysval; | |
113 | }; | |
114 | ||
115 | /* this node is a proforma for those that follow */ | |
116 | struct trenod { | |
117 | INT tretyp; | |
118 | IOPTR treio; | |
119 | }; | |
120 | ||
121 | /* dummy for access only */ | |
122 | struct argnod { | |
123 | ARGPTR argnxt; | |
124 | CHAR argval[1]; | |
125 | }; | |
126 | ||
127 | struct dolnod { | |
128 | DOLPTR dolnxt; | |
129 | INT doluse; | |
130 | CHAR dolarg[1]; | |
131 | }; | |
132 | ||
133 | struct forknod { | |
134 | INT forktyp; | |
135 | IOPTR forkio; | |
136 | TREPTR forktre; | |
137 | }; | |
138 | ||
139 | struct comnod { | |
140 | INT comtyp; | |
141 | IOPTR comio; | |
142 | ARGPTR comarg; | |
143 | ARGPTR comset; | |
144 | }; | |
145 | ||
146 | struct ifnod { | |
147 | INT iftyp; | |
148 | TREPTR iftre; | |
149 | TREPTR thtre; | |
150 | TREPTR eltre; | |
151 | }; | |
152 | ||
153 | struct whnod { | |
154 | INT whtyp; | |
155 | TREPTR whtre; | |
156 | TREPTR dotre; | |
157 | }; | |
158 | ||
159 | struct fornod { | |
160 | INT fortyp; | |
161 | TREPTR fortre; | |
162 | STRING fornam; | |
163 | COMPTR forlst; | |
164 | }; | |
165 | ||
166 | struct swnod { | |
167 | INT swtyp; | |
168 | STRING swarg; | |
169 | REGPTR swlst; | |
170 | }; | |
171 | ||
172 | struct regnod { | |
173 | ARGPTR regptr; | |
174 | TREPTR regcom; | |
175 | REGPTR regnxt; | |
176 | }; | |
177 | ||
178 | struct parnod { | |
179 | INT partyp; | |
180 | TREPTR partre; | |
181 | }; | |
182 | ||
183 | struct lstnod { | |
184 | INT lsttyp; | |
185 | TREPTR lstlef; | |
186 | TREPTR lstrit; | |
187 | }; | |
188 | ||
189 | struct ionod { | |
190 | INT iofile; | |
191 | STRING ioname; | |
192 | IOPTR ionxt; | |
193 | IOPTR iolst; | |
194 | }; | |
195 | ||
196 | #define FORKTYPE (sizeof(struct forknod)) | |
197 | #define COMTYPE (sizeof(struct comnod)) | |
198 | #define IFTYPE (sizeof(struct ifnod)) | |
199 | #define WHTYPE (sizeof(struct whnod)) | |
200 | #define FORTYPE (sizeof(struct fornod)) | |
201 | #define SWTYPE (sizeof(struct swnod)) | |
202 | #define REGTYPE (sizeof(struct regnod)) | |
203 | #define PARTYPE (sizeof(struct parnod)) | |
204 | #define LSTTYPE (sizeof(struct lstnod)) | |
205 | #define IOTYPE (sizeof(struct ionod)) |