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1 | /*- |
2 | * Copyright (c) 1980 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
252367af DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
0fc6e47b KB |
9 | static char sccsid[] = "@(#)yyput.c 5.3 (Berkeley) %G%"; |
10 | #endif /* not lint */ | |
252367af | 11 | |
9a071694 PK |
12 | /* |
13 | * pi - Pascal interpreter code translator | |
14 | * | |
15 | * Charles Haley, Bill Joy UCB | |
16 | * Version 1.2 January 1979 | |
17 | * | |
18 | * | |
19 | * pxp - Pascal execution profiler | |
20 | * | |
21 | * Bill Joy UCB | |
22 | * Version 1.2 January 1979 | |
23 | */ | |
24 | ||
84ef74c0 | 25 | #include "whoami.h" |
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26 | #include "0.h" |
27 | #include "tree.h" | |
28 | #include "yy.h" | |
29 | ||
30 | /* | |
31 | * Structure describing queued listing lines during the forward move | |
32 | * of error recovery. These lines will be stroed by yyoutline during | |
33 | * the forward move and flushed by yyoutfl or yyflush when an | |
34 | * error occurs or a program termination. | |
35 | */ | |
36 | struct B { | |
37 | int Bmagic; | |
38 | int Bline; | |
39 | int Bseekp; | |
40 | char *Bfile; | |
41 | int Bseqid; | |
42 | struct B *Bnext; | |
43 | } *bottled; | |
44 | ||
45 | /* | |
46 | * Filename gives the current input file, lastname is | |
47 | * the last filename we printed, and lastid is the seqid of the last line | |
48 | * we printed, to help us avoid printing | |
49 | * multiple copies of lines. | |
50 | */ | |
51 | extern char *filename; | |
52 | char *lastname; | |
53 | int lastid; | |
54 | ||
55 | char hadsome; | |
56 | char holdbl; | |
57 | \f | |
58 | /* | |
59 | * Print the current line in the input line | |
60 | * buffer or, in a forward move of the recovery, queue it for printing. | |
61 | */ | |
62 | yyoutline() | |
63 | { | |
64 | register struct B *bp; | |
65 | ||
66 | if (Recovery) { | |
67 | bp = tree(6, T_BOTTLE, yyline, yylinpt, filename, yyseqid); | |
68 | if (bottled != NIL) | |
69 | bp->Bnext = bottled->Bnext, bottled->Bnext = bp; | |
70 | else | |
71 | bp->Bnext = bp; | |
72 | bottled = bp; | |
73 | return; | |
74 | } | |
75 | yyoutfl(yyseqid); | |
76 | if (yyseqid != lastid) | |
77 | yyprline(charbuf, yyline, filename, yyseqid); | |
78 | } | |
79 | ||
80 | /* | |
81 | * Flush all the bottled output. | |
82 | */ | |
83 | yyflush() | |
84 | { | |
85 | ||
86 | yyoutfl(32767); | |
87 | } | |
88 | ||
89 | /* | |
90 | * Flush the listing to the sequence id toseqid | |
91 | */ | |
92 | yyoutfl(toseqid) | |
93 | int toseqid; | |
94 | { | |
95 | register struct B *bp; | |
96 | ||
97 | bp = bottled; | |
98 | if (bp == NIL) | |
99 | return; | |
100 | bp = bp->Bnext; | |
101 | while (bp->Bseqid <= toseqid) { | |
102 | yygetline(bp->Bfile, bp->Bseekp, bp->Bline, bp->Bseqid); | |
103 | if (bp->Bnext == bp) { | |
104 | bottled = NIL; | |
105 | break; | |
106 | } | |
107 | bp = bp->Bnext; | |
108 | bottled->Bnext = bp; | |
109 | } | |
110 | } | |
111 | \f | |
f4e01610 | 112 | int yygetunit = -1; |
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113 | char *yygetfile; |
114 | ||
115 | /* | |
116 | * Yysync guarantees that the line associated | |
117 | * with the current token was the last line | |
118 | * printed for a syntactic error message. | |
119 | */ | |
120 | yysync() | |
121 | { | |
122 | ||
123 | yyoutfl(yyeseqid); | |
124 | if (lastid != yyeseqid) | |
125 | yygetline(yyefile, yyseekp, yyeline, yyeseqid); | |
126 | } | |
127 | ||
128 | yySsync() | |
129 | { | |
130 | ||
131 | yyoutfl(OY.Yyeseqid); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Yygetline gets a line from a file after we have | |
136 | * lost it. The pointer efile gives the name of the file, | |
137 | * seekp its offset in the file, and eline its line number. | |
138 | * If this routine has been called before the last file | |
139 | * it worked on will be open in yygetunit, with the files | |
140 | * name being given in yygetfile. Note that this unit must | |
141 | * be opened independently of the unit in use for normal i/o | |
142 | * to this file; if it were a dup seeks would seek both files. | |
143 | */ | |
144 | yygetline(efile, seekp, eline, eseqid) | |
145 | char *efile; | |
146 | int seekp, eline, eseqid; | |
147 | { | |
148 | register int cnt; | |
149 | register char *bp; | |
150 | char buf[CBSIZE + 1]; | |
151 | ||
152 | if (lastid == eseqid) | |
153 | return; | |
154 | if (eseqid == yyseqid) { | |
155 | bp = charbuf; | |
156 | yyprtd++; | |
157 | } else { | |
158 | bp = buf; | |
159 | if (efile != yygetfile) { | |
160 | close(yygetunit); | |
161 | yygetfile = efile; | |
162 | yygetunit = open(yygetfile, 0); | |
163 | if (yygetunit < 0) | |
164 | oops: | |
165 | perror(yygetfile), pexit(DIED); | |
166 | } | |
167 | if (lseek(yygetunit, (long)seekp, 0) < 0) | |
168 | goto oops; | |
169 | cnt = read(yygetunit, bp, CBSIZE); | |
170 | if (cnt < 0) | |
171 | goto oops; | |
172 | bp[cnt] = 0; | |
173 | } | |
174 | yyprline(bp, eline, efile, eseqid); | |
175 | } | |
176 | ||
177 | yyretrieve() | |
178 | { | |
179 | ||
180 | yygetline(OY.Yyefile, OY.Yyseekp, OY.Yyeline, OY.Yyeseqid); | |
181 | } | |
182 | \f | |
183 | /* | |
184 | * Print the line in the character buffer which has | |
185 | * line number line. The buffer may be terminated by a new | |
186 | * line character or a null character. We process | |
187 | * form feed directives, lines with only a form feed character, and | |
188 | * suppress numbering lines which are empty here. | |
189 | */ | |
190 | yyprline(buf, line, file, id) | |
191 | register char *buf; | |
192 | int line; | |
193 | char *file; | |
194 | int id; | |
195 | { | |
196 | ||
197 | lastid = id; | |
198 | if (buf[0] == '\f' && buf[1] == '\n') { | |
199 | printf("\f\n"); | |
200 | hadsome = 0; | |
201 | holdbl = 0; | |
202 | return; | |
203 | } | |
204 | if (holdbl) { | |
205 | putchar('\n'); | |
206 | holdbl = 0; | |
207 | } | |
208 | if (buf[0] == '\n') | |
209 | holdbl = 1; | |
210 | else { | |
211 | yysetfile(file); | |
212 | yyprintf(buf, line); | |
213 | } | |
214 | hadsome = 1; | |
215 | } | |
216 | ||
217 | yyprintf(cp, line) | |
218 | register char *cp; | |
219 | int line; | |
220 | { | |
221 | ||
222 | printf("%6d ", line); | |
223 | while (*cp != 0 && *cp != '\n') | |
224 | putchar(graphic(*cp++)); | |
225 | putchar('\n'); | |
226 | } | |
227 | ||
228 | graphic(ch) | |
229 | register CHAR ch; | |
230 | { | |
231 | ||
232 | switch (ch) { | |
233 | default: | |
234 | if (ch >= ' ') | |
235 | return (ch); | |
236 | case 0177: | |
237 | return ('?'); | |
238 | case '\n': | |
239 | case '\t': | |
240 | return (ch); | |
241 | } | |
242 | } | |
243 | \f | |
244 | extern int nopflg; | |
245 | ||
f4e01610 | 246 | char printed = 1; |
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247 | /* |
248 | * Set the current file name to be file, | |
249 | * printing the name, or a header on a new | |
250 | * page if required. | |
251 | */ | |
252 | yysetfile(file) | |
253 | register char *file; | |
254 | { | |
255 | ||
256 | #ifdef PXP | |
257 | if (nopflg == 1) | |
258 | return; | |
259 | #endif | |
260 | ||
261 | if (lastname == file) | |
262 | return; | |
263 | if (file == filename && opt('n') && (printed & 02) == 0) { | |
8ea25423 | 264 | printed |= 02; |
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265 | header(); |
266 | } else | |
267 | yyputfn(file); | |
268 | lastname = file; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Put out an include file name | |
273 | * if an error occurs but the name has | |
274 | * not been printed (or if another name | |
275 | * has been printed since it has). | |
276 | */ | |
277 | yyputfn(cp) | |
278 | register char *cp; | |
279 | { | |
280 | extern int outcol; | |
281 | ||
282 | if (cp == lastname && printed) | |
283 | return; | |
284 | lastname = cp; | |
285 | printed = 1; | |
286 | #ifdef PXP | |
287 | if (outcol) | |
288 | putchar('\n'); | |
289 | #endif | |
290 | printf("%s:\n", cp); | |
291 | hadsome = 1; | |
292 | } |