Commit | Line | Data |
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eb8dd88e BJ |
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 1.2 January 1979 | |
8 | * | |
9 | * | |
10 | * pxp - Pascal execution profiler | |
11 | * | |
12 | * Bill Joy UCB | |
13 | * Version 1.2 January 1979 | |
14 | */ | |
15 | ||
16 | #include "0.h" | |
17 | #include "tree.h" | |
18 | #include "yy.h" | |
19 | ||
20 | /* | |
21 | * Structure describing queued listing lines during the forward move | |
22 | * of error recovery. These lines will be stroed by yyoutline during | |
23 | * the forward move and flushed by yyoutfl or yyflush when an | |
24 | * error occurs or a program termination. | |
25 | */ | |
26 | struct B { | |
27 | int Bmagic; | |
28 | int Bline; | |
29 | int Bseekp; | |
30 | char *Bfile; | |
31 | int Bseqid; | |
32 | struct B *Bnext; | |
33 | } *bottled; | |
34 | ||
35 | /* | |
36 | * Filename gives the current input file, lastname is | |
37 | * the last filename we printed, and lastid is the seqid of the last line | |
38 | * we printed, to help us avoid printing | |
39 | * multiple copies of lines. | |
40 | */ | |
41 | extern char *filename; | |
42 | char *lastname; | |
43 | int lastid; | |
44 | ||
45 | char hadsome; | |
46 | char holdbl; | |
47 | \f | |
48 | /* | |
49 | * Print the current line in the input line | |
50 | * buffer or, in a forward move of the recovery, queue it for printing. | |
51 | */ | |
52 | yyoutline() | |
53 | { | |
54 | register struct B *bp; | |
55 | ||
56 | if (Recovery) { | |
57 | bp = tree(6, T_BOTTLE, yyline, yylinpt, filename, yyseqid); | |
58 | if (bottled != NIL) | |
59 | bp->Bnext = bottled->Bnext, bottled->Bnext = bp; | |
60 | else | |
61 | bp->Bnext = bp; | |
62 | bottled = bp; | |
63 | return; | |
64 | } | |
65 | yyoutfl(yyseqid); | |
66 | if (yyseqid != lastid) | |
67 | yyprline(charbuf, yyline, filename, yyseqid); | |
68 | } | |
69 | ||
70 | /* | |
71 | * Flush all the bottled output. | |
72 | */ | |
73 | yyflush() | |
74 | { | |
75 | ||
76 | yyoutfl(32767); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Flush the listing to the sequence id toseqid | |
81 | */ | |
82 | yyoutfl(toseqid) | |
83 | int toseqid; | |
84 | { | |
85 | register struct B *bp; | |
86 | ||
87 | bp = bottled; | |
88 | if (bp == NIL) | |
89 | return; | |
90 | bp = bp->Bnext; | |
91 | while (bp->Bseqid <= toseqid) { | |
92 | yygetline(bp->Bfile, bp->Bseekp, bp->Bline, bp->Bseqid); | |
93 | if (bp->Bnext == bp) { | |
94 | bottled = NIL; | |
95 | break; | |
96 | } | |
97 | bp = bp->Bnext; | |
98 | bottled->Bnext = bp; | |
99 | } | |
100 | } | |
101 | \f | |
102 | int yygetunit -1; | |
103 | char *yygetfile; | |
104 | ||
105 | /* | |
106 | * Yysync guarantees that the line associated | |
107 | * with the current token was the last line | |
108 | * printed for a syntactic error message. | |
109 | */ | |
110 | yysync() | |
111 | { | |
112 | ||
113 | yyoutfl(yyeseqid); | |
114 | if (lastid != yyeseqid) | |
115 | yygetline(yyefile, yyseekp, yyeline, yyeseqid); | |
116 | } | |
117 | ||
118 | yySsync() | |
119 | { | |
120 | ||
121 | yyoutfl(OY.Yyeseqid); | |
122 | } | |
123 | ||
124 | /* | |
125 | * Yygetline gets a line from a file after we have | |
126 | * lost it. The pointer efile gives the name of the file, | |
127 | * seekp its offset in the file, and eline its line number. | |
128 | * If this routine has been called before the last file | |
129 | * it worked on will be open in yygetunit, with the files | |
130 | * name being given in yygetfile. Note that this unit must | |
131 | * be opened independently of the unit in use for normal i/o | |
132 | * to this file; if it were a dup seeks would seek both files. | |
133 | */ | |
134 | yygetline(efile, seekp, eline, eseqid) | |
135 | char *efile; | |
136 | int seekp, eline, eseqid; | |
137 | { | |
138 | register int cnt; | |
139 | register char *bp; | |
140 | char buf[CBSIZE + 1]; | |
141 | ||
142 | if (lastid == eseqid) | |
143 | return; | |
144 | if (eseqid == yyseqid) { | |
145 | bp = charbuf; | |
146 | yyprtd++; | |
147 | } else { | |
148 | bp = buf; | |
149 | if (efile != yygetfile) { | |
150 | close(yygetunit); | |
151 | yygetfile = efile; | |
152 | yygetunit = open(yygetfile, 0); | |
153 | if (yygetunit < 0) | |
154 | oops: | |
155 | perror(yygetfile), pexit(DIED); | |
156 | } | |
157 | if (lseek(yygetunit, (long)seekp, 0) < 0) | |
158 | goto oops; | |
159 | cnt = read(yygetunit, bp, CBSIZE); | |
160 | if (cnt < 0) | |
161 | goto oops; | |
162 | bp[cnt] = 0; | |
163 | } | |
164 | yyprline(bp, eline, efile, eseqid); | |
165 | } | |
166 | ||
167 | yyretrieve() | |
168 | { | |
169 | ||
170 | yygetline(OY.Yyefile, OY.Yyseekp, OY.Yyeline, OY.Yyeseqid); | |
171 | } | |
172 | \f | |
173 | /* | |
174 | * Print the line in the character buffer which has | |
175 | * line number line. The buffer may be terminated by a new | |
176 | * line character or a null character. We process | |
177 | * form feed directives, lines with only a form feed character, and | |
178 | * suppress numbering lines which are empty here. | |
179 | */ | |
180 | yyprline(buf, line, file, id) | |
181 | register char *buf; | |
182 | int line; | |
183 | char *file; | |
184 | int id; | |
185 | { | |
186 | ||
187 | lastid = id; | |
188 | if (buf[0] == '\f' && buf[1] == '\n') { | |
189 | printf("\f\n"); | |
190 | hadsome = 0; | |
191 | holdbl = 0; | |
192 | return; | |
193 | } | |
194 | if (holdbl) { | |
195 | putchar('\n'); | |
196 | holdbl = 0; | |
197 | } | |
198 | if (buf[0] == '\n') | |
199 | holdbl = 1; | |
200 | else { | |
201 | yysetfile(file); | |
202 | yyprintf(buf, line); | |
203 | } | |
204 | hadsome = 1; | |
205 | } | |
206 | ||
207 | yyprintf(cp, line) | |
208 | register char *cp; | |
209 | int line; | |
210 | { | |
211 | ||
212 | printf("%6d ", line); | |
213 | while (*cp != 0 && *cp != '\n') | |
214 | putchar(graphic(*cp++)); | |
215 | putchar('\n'); | |
216 | } | |
217 | ||
218 | graphic(ch) | |
219 | register CHAR ch; | |
220 | { | |
221 | ||
222 | switch (ch) { | |
223 | default: | |
224 | if (ch >= ' ') | |
225 | return (ch); | |
226 | case 0177: | |
227 | return ('?'); | |
228 | case '\n': | |
229 | case '\t': | |
230 | return (ch); | |
231 | } | |
232 | } | |
233 | \f | |
234 | extern int nopflg; | |
235 | ||
236 | char printed 1; | |
237 | /* | |
238 | * Set the current file name to be file, | |
239 | * printing the name, or a header on a new | |
240 | * page if required. | |
241 | */ | |
242 | yysetfile(file) | |
243 | register char *file; | |
244 | { | |
245 | ||
246 | #ifdef PXP | |
247 | if (nopflg == 1) | |
248 | return; | |
249 | #endif | |
250 | ||
251 | if (lastname == file) | |
252 | return; | |
253 | if (file == filename && opt('n') && (printed & 02) == 0) { | |
254 | printed =| 02; | |
255 | header(); | |
256 | } else | |
257 | yyputfn(file); | |
258 | lastname = file; | |
259 | } | |
260 | ||
261 | /* | |
262 | * Put out an include file name | |
263 | * if an error occurs but the name has | |
264 | * not been printed (or if another name | |
265 | * has been printed since it has). | |
266 | */ | |
267 | yyputfn(cp) | |
268 | register char *cp; | |
269 | { | |
270 | extern int outcol; | |
271 | ||
272 | if (cp == lastname && printed) | |
273 | return; | |
274 | lastname = cp; | |
275 | printed = 1; | |
276 | #ifdef PXP | |
277 | if (outcol) | |
278 | putchar('\n'); | |
279 | #endif | |
280 | printf("%s:\n", cp); | |
281 | hadsome = 1; | |
282 | } |