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c7633dd5 CH |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | # | |
3 | /* | |
4 | * pi - Pascal interpreter code translator | |
5 | * | |
6 | * Charles Haley, Bill Joy UCB | |
7 | * Version 1.1 February 1978 | |
8 | * | |
9 | * | |
10 | * pxp - Pascal execution profiler | |
11 | * | |
12 | * Bill Joy UCB | |
13 | * Version 1.1 February 1978 | |
14 | */ | |
15 | ||
16 | #include "whoami" | |
17 | #include "0.h" | |
18 | #include "tree.h" | |
19 | #include "yy.h" | |
20 | ||
21 | /* | |
22 | * Structure describing queued listing lines during the forward move | |
23 | * of error recovery. These lines will be stroed by yyoutline during | |
24 | * the forward move and flushed by yyoutfl or yyflush when an | |
25 | * error occurs or a program termination. | |
26 | */ | |
27 | struct B { | |
28 | int Bmagic; | |
29 | int Bline; | |
30 | int Bseekp; | |
31 | char *Bfile; | |
32 | int Bseqid; | |
33 | struct B *Bnext; | |
34 | } *bottled; | |
35 | ||
36 | /* | |
37 | * Filename gives the current input file, lastname is | |
38 | * the last filename we printed, and lastid is the seqid of the last line | |
39 | * we printed, to help us avoid printing | |
40 | * multiple copies of lines. | |
41 | */ | |
42 | extern char *filename; | |
43 | char *lastname; | |
44 | int lastid; | |
45 | ||
46 | char hadsome; | |
47 | char holdbl; | |
48 | \f | |
49 | /* | |
50 | * Print the current line in the input line | |
51 | * buffer or, in a forward move of the recovery, queue it for printing. | |
52 | */ | |
53 | yyoutline() | |
54 | { | |
55 | register struct B *bp; | |
56 | ||
57 | if (Recovery) { | |
58 | bp = tree(6, T_BOTTLE, yyline, yylinpt, filename, yyseqid); | |
59 | if (bottled != NIL) | |
60 | bp->Bnext = bottled->Bnext, bottled->Bnext = bp; | |
61 | else | |
62 | bp->Bnext = bp; | |
63 | bottled = bp; | |
64 | return; | |
65 | } | |
66 | yyoutfl(yyseqid); | |
67 | if (yyseqid != lastid) | |
68 | yyprline(charbuf, yyline, filename, yyseqid); | |
69 | } | |
70 | ||
71 | /* | |
72 | * Flush all the bottled output. | |
73 | */ | |
74 | yyflush() | |
75 | { | |
76 | ||
77 | yyoutfl(32767); | |
78 | } | |
79 | ||
80 | /* | |
81 | * Flush the listing to the sequence id toseqid | |
82 | */ | |
83 | yyoutfl(toseqid) | |
84 | int toseqid; | |
85 | { | |
86 | register struct B *bp; | |
87 | ||
88 | bp = bottled; | |
89 | if (bp == NIL) | |
90 | return; | |
91 | bp = bp->Bnext; | |
92 | while (bp->Bseqid <= toseqid) { | |
93 | yygetline(bp->Bfile, bp->Bseekp, bp->Bline, bp->Bseqid); | |
94 | if (bp->Bnext == bp) { | |
95 | bottled = NIL; | |
96 | break; | |
97 | } | |
98 | bp = bp->Bnext; | |
99 | bottled->Bnext = bp; | |
100 | } | |
101 | } | |
102 | \f | |
103 | FILE *yygetunit = NULL; | |
104 | char *yygetfile; | |
105 | ||
106 | /* | |
107 | * Yysync guarantees that the line associated | |
108 | * with the current token was the last line | |
109 | * printed for a syntactic error message. | |
110 | */ | |
111 | yysync() | |
112 | { | |
113 | ||
114 | yyoutfl(yyeseqid); | |
115 | if (lastid != yyeseqid) | |
116 | yygetline(yyefile, yyseekp, yyeline, yyeseqid); | |
117 | } | |
118 | ||
119 | yySsync() | |
120 | { | |
121 | ||
122 | yyoutfl(OY.Yyeseqid); | |
123 | } | |
124 | ||
125 | /* | |
126 | * Yygetline gets a line from a file after we have | |
127 | * lost it. The pointer efile gives the name of the file, | |
128 | * seekp its offset in the file, and eline its line number. | |
129 | * If this routine has been called before the last file | |
130 | * it worked on will be open in yygetunit, with the files | |
131 | * name being given in yygetfile. Note that this unit must | |
132 | * be opened independently of the unit in use for normal i/o | |
133 | * to this file; if it were a dup seeks would seek both files. | |
134 | */ | |
135 | yygetline(efile, seekp, eline, eseqid) | |
136 | char *efile; | |
137 | int seekp, eline, eseqid; | |
138 | { | |
139 | register int cnt; | |
140 | register char *bp; | |
141 | char buf[CBSIZE + 1]; | |
142 | ||
143 | if (lastid == eseqid) | |
144 | return; | |
145 | if (eseqid == yyseqid) { | |
146 | bp = charbuf; | |
147 | yyprtd++; | |
148 | } else { | |
149 | bp = buf; | |
150 | if (efile != yygetfile) { | |
151 | if ( yygetunit != NULL ) | |
152 | fclose( yygetunit ); | |
153 | yygetfile = efile; | |
154 | yygetunit = fopen( yygetfile , "r" ); | |
155 | if (yygetunit < 0) | |
156 | oops: | |
157 | perror(yygetfile), pexit(DIED); | |
158 | } | |
159 | if ( fseek( yygetunit , (long) seekp , 0 ) < 0) | |
160 | goto oops; | |
161 | cnt = fread( bp , sizeof( * bp ) , CBSIZE , yygetunit ); | |
162 | if (cnt < 0) | |
163 | goto oops; | |
164 | bp[cnt] = 0; | |
165 | } | |
166 | yyprline(bp, eline, efile, eseqid); | |
167 | } | |
168 | ||
169 | yyretrieve() | |
170 | { | |
171 | ||
172 | yygetline(OY.Yyefile, OY.Yyseekp, OY.Yyeline, OY.Yyeseqid); | |
173 | } | |
174 | \f | |
175 | /* | |
176 | * Print the line in the character buffer which has | |
177 | * line number line. The buffer may be terminated by a new | |
178 | * line character or a null character. We process | |
179 | * form feed directives, lines with only a form feed character, and | |
180 | * suppress numbering lines which are empty here. | |
181 | */ | |
182 | yyprline(buf, line, file, id) | |
183 | register char *buf; | |
184 | int line; | |
185 | char *file; | |
186 | int id; | |
187 | { | |
188 | ||
189 | lastid = id; | |
190 | if (buf[0] == '\f' && buf[1] == '\n') { | |
191 | printf("\f\n"); | |
192 | hadsome = 0; | |
193 | holdbl = 0; | |
194 | return; | |
195 | } | |
196 | if (holdbl) { | |
197 | pchr('\n'); | |
198 | holdbl = 0; | |
199 | } | |
200 | if (buf[0] == '\n') | |
201 | holdbl = 1; | |
202 | else { | |
203 | yysetfile(file); | |
204 | yyprintf(buf, line); | |
205 | } | |
206 | hadsome = 1; | |
207 | } | |
208 | ||
209 | yyprintf(cp, line) | |
210 | register char *cp; | |
211 | int line; | |
212 | { | |
213 | ||
214 | printf("%6d ", line); | |
215 | while (*cp != 0 && *cp != '\n') | |
216 | pchr(graphic(*cp++)); | |
217 | pchr('\n'); | |
218 | } | |
219 | ||
220 | graphic(ch) | |
221 | register CHAR ch; | |
222 | { | |
223 | ||
224 | switch (ch) { | |
225 | default: | |
226 | if (ch >= ' ') | |
227 | return (ch); | |
228 | case 0177: | |
229 | return ('?'); | |
230 | case '\n': | |
231 | case '\t': | |
232 | return (ch); | |
233 | } | |
234 | } | |
235 | \f | |
236 | extern int nopflg; | |
237 | ||
238 | char printed 1; | |
239 | /* | |
240 | * Set the current file name to be file, | |
241 | * printing the name, or a header on a new | |
242 | * page if required. | |
243 | */ | |
244 | yysetfile(file) | |
245 | register char *file; | |
246 | { | |
247 | ||
248 | #ifdef PXP | |
249 | if (nopflg == 1) | |
250 | return; | |
251 | #endif | |
252 | ||
253 | if (lastname == file) | |
254 | return; | |
255 | if (file == filename && opt('n') && (printed & 02) == 0) { | |
256 | printed =| 02; | |
257 | header(); | |
258 | } else | |
259 | yyputfn(file); | |
260 | lastname = file; | |
261 | } | |
262 | ||
263 | /* | |
264 | * Put out an include file name | |
265 | * if an error occurs but the name has | |
266 | * not been printed (or if another name | |
267 | * has been printed since it has). | |
268 | */ | |
269 | yyputfn(cp) | |
270 | register char *cp; | |
271 | { | |
272 | extern int outcol; | |
273 | ||
274 | if (cp == lastname && printed) | |
275 | return; | |
276 | lastname = cp; | |
277 | printed = 1; | |
278 | #ifdef PXP | |
279 | if (outcol) | |
280 | pchr('\n'); | |
281 | #endif | |
282 | gettime( cp ); | |
283 | printf("%s %s:\n" , myctime( &tvec ) , cp ); | |
284 | hadsome = 1; | |
285 | } |