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252367af DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
ca67e7b4 | 8 | static char sccsid[] = "@(#)yyput.c 5.2 (Berkeley) 3/17/87"; |
252367af DF |
9 | #endif not lint |
10 | ||
9a071694 PK |
11 | /* |
12 | * pi - Pascal interpreter code translator | |
13 | * | |
14 | * Charles Haley, Bill Joy UCB | |
15 | * Version 1.2 January 1979 | |
16 | * | |
17 | * | |
18 | * pxp - Pascal execution profiler | |
19 | * | |
20 | * Bill Joy UCB | |
21 | * Version 1.2 January 1979 | |
22 | */ | |
23 | ||
84ef74c0 | 24 | #include "whoami.h" |
9a071694 PK |
25 | #include "0.h" |
26 | #include "tree.h" | |
27 | #include "yy.h" | |
28 | ||
29 | /* | |
30 | * Structure describing queued listing lines during the forward move | |
31 | * of error recovery. These lines will be stroed by yyoutline during | |
32 | * the forward move and flushed by yyoutfl or yyflush when an | |
33 | * error occurs or a program termination. | |
34 | */ | |
35 | struct B { | |
36 | int Bmagic; | |
37 | int Bline; | |
38 | int Bseekp; | |
39 | char *Bfile; | |
40 | int Bseqid; | |
41 | struct B *Bnext; | |
42 | } *bottled; | |
43 | ||
44 | /* | |
45 | * Filename gives the current input file, lastname is | |
46 | * the last filename we printed, and lastid is the seqid of the last line | |
47 | * we printed, to help us avoid printing | |
48 | * multiple copies of lines. | |
49 | */ | |
50 | extern char *filename; | |
51 | char *lastname; | |
52 | int lastid; | |
53 | ||
54 | char hadsome; | |
55 | char holdbl; | |
56 | \f | |
57 | /* | |
58 | * Print the current line in the input line | |
59 | * buffer or, in a forward move of the recovery, queue it for printing. | |
60 | */ | |
61 | yyoutline() | |
62 | { | |
63 | register struct B *bp; | |
64 | ||
65 | if (Recovery) { | |
66 | bp = tree(6, T_BOTTLE, yyline, yylinpt, filename, yyseqid); | |
67 | if (bottled != NIL) | |
68 | bp->Bnext = bottled->Bnext, bottled->Bnext = bp; | |
69 | else | |
70 | bp->Bnext = bp; | |
71 | bottled = bp; | |
72 | return; | |
73 | } | |
74 | yyoutfl(yyseqid); | |
75 | if (yyseqid != lastid) | |
76 | yyprline(charbuf, yyline, filename, yyseqid); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Flush all the bottled output. | |
81 | */ | |
82 | yyflush() | |
83 | { | |
84 | ||
85 | yyoutfl(32767); | |
86 | } | |
87 | ||
88 | /* | |
89 | * Flush the listing to the sequence id toseqid | |
90 | */ | |
91 | yyoutfl(toseqid) | |
92 | int toseqid; | |
93 | { | |
94 | register struct B *bp; | |
95 | ||
96 | bp = bottled; | |
97 | if (bp == NIL) | |
98 | return; | |
99 | bp = bp->Bnext; | |
100 | while (bp->Bseqid <= toseqid) { | |
101 | yygetline(bp->Bfile, bp->Bseekp, bp->Bline, bp->Bseqid); | |
102 | if (bp->Bnext == bp) { | |
103 | bottled = NIL; | |
104 | break; | |
105 | } | |
106 | bp = bp->Bnext; | |
107 | bottled->Bnext = bp; | |
108 | } | |
109 | } | |
110 | \f | |
f4e01610 | 111 | int yygetunit = -1; |
9a071694 PK |
112 | char *yygetfile; |
113 | ||
114 | /* | |
115 | * Yysync guarantees that the line associated | |
116 | * with the current token was the last line | |
117 | * printed for a syntactic error message. | |
118 | */ | |
119 | yysync() | |
120 | { | |
121 | ||
122 | yyoutfl(yyeseqid); | |
123 | if (lastid != yyeseqid) | |
124 | yygetline(yyefile, yyseekp, yyeline, yyeseqid); | |
125 | } | |
126 | ||
127 | yySsync() | |
128 | { | |
129 | ||
130 | yyoutfl(OY.Yyeseqid); | |
131 | } | |
132 | ||
133 | /* | |
134 | * Yygetline gets a line from a file after we have | |
135 | * lost it. The pointer efile gives the name of the file, | |
136 | * seekp its offset in the file, and eline its line number. | |
137 | * If this routine has been called before the last file | |
138 | * it worked on will be open in yygetunit, with the files | |
139 | * name being given in yygetfile. Note that this unit must | |
140 | * be opened independently of the unit in use for normal i/o | |
141 | * to this file; if it were a dup seeks would seek both files. | |
142 | */ | |
143 | yygetline(efile, seekp, eline, eseqid) | |
144 | char *efile; | |
145 | int seekp, eline, eseqid; | |
146 | { | |
147 | register int cnt; | |
148 | register char *bp; | |
149 | char buf[CBSIZE + 1]; | |
150 | ||
151 | if (lastid == eseqid) | |
152 | return; | |
153 | if (eseqid == yyseqid) { | |
154 | bp = charbuf; | |
155 | yyprtd++; | |
156 | } else { | |
157 | bp = buf; | |
158 | if (efile != yygetfile) { | |
159 | close(yygetunit); | |
160 | yygetfile = efile; | |
161 | yygetunit = open(yygetfile, 0); | |
162 | if (yygetunit < 0) | |
163 | oops: | |
164 | perror(yygetfile), pexit(DIED); | |
165 | } | |
166 | if (lseek(yygetunit, (long)seekp, 0) < 0) | |
167 | goto oops; | |
168 | cnt = read(yygetunit, bp, CBSIZE); | |
169 | if (cnt < 0) | |
170 | goto oops; | |
171 | bp[cnt] = 0; | |
172 | } | |
173 | yyprline(bp, eline, efile, eseqid); | |
174 | } | |
175 | ||
176 | yyretrieve() | |
177 | { | |
178 | ||
179 | yygetline(OY.Yyefile, OY.Yyseekp, OY.Yyeline, OY.Yyeseqid); | |
180 | } | |
181 | \f | |
182 | /* | |
183 | * Print the line in the character buffer which has | |
184 | * line number line. The buffer may be terminated by a new | |
185 | * line character or a null character. We process | |
186 | * form feed directives, lines with only a form feed character, and | |
187 | * suppress numbering lines which are empty here. | |
188 | */ | |
189 | yyprline(buf, line, file, id) | |
190 | register char *buf; | |
191 | int line; | |
192 | char *file; | |
193 | int id; | |
194 | { | |
195 | ||
196 | lastid = id; | |
197 | if (buf[0] == '\f' && buf[1] == '\n') { | |
198 | printf("\f\n"); | |
199 | hadsome = 0; | |
200 | holdbl = 0; | |
201 | return; | |
202 | } | |
203 | if (holdbl) { | |
204 | putchar('\n'); | |
205 | holdbl = 0; | |
206 | } | |
207 | if (buf[0] == '\n') | |
208 | holdbl = 1; | |
209 | else { | |
210 | yysetfile(file); | |
211 | yyprintf(buf, line); | |
212 | } | |
213 | hadsome = 1; | |
214 | } | |
215 | ||
216 | yyprintf(cp, line) | |
217 | register char *cp; | |
218 | int line; | |
219 | { | |
220 | ||
221 | printf("%6d ", line); | |
222 | while (*cp != 0 && *cp != '\n') | |
223 | putchar(graphic(*cp++)); | |
224 | putchar('\n'); | |
225 | } | |
226 | ||
227 | graphic(ch) | |
228 | register CHAR ch; | |
229 | { | |
230 | ||
231 | switch (ch) { | |
232 | default: | |
233 | if (ch >= ' ') | |
234 | return (ch); | |
235 | case 0177: | |
236 | return ('?'); | |
237 | case '\n': | |
238 | case '\t': | |
239 | return (ch); | |
240 | } | |
241 | } | |
242 | \f | |
243 | extern int nopflg; | |
244 | ||
f4e01610 | 245 | char printed = 1; |
9a071694 PK |
246 | /* |
247 | * Set the current file name to be file, | |
248 | * printing the name, or a header on a new | |
249 | * page if required. | |
250 | */ | |
251 | yysetfile(file) | |
252 | register char *file; | |
253 | { | |
254 | ||
255 | #ifdef PXP | |
256 | if (nopflg == 1) | |
257 | return; | |
258 | #endif | |
259 | ||
260 | if (lastname == file) | |
261 | return; | |
262 | if (file == filename && opt('n') && (printed & 02) == 0) { | |
8ea25423 | 263 | printed |= 02; |
9a071694 PK |
264 | header(); |
265 | } else | |
266 | yyputfn(file); | |
267 | lastname = file; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Put out an include file name | |
272 | * if an error occurs but the name has | |
273 | * not been printed (or if another name | |
274 | * has been printed since it has). | |
275 | */ | |
276 | yyputfn(cp) | |
277 | register char *cp; | |
278 | { | |
279 | extern int outcol; | |
280 | ||
281 | if (cp == lastname && printed) | |
282 | return; | |
283 | lastname = cp; | |
284 | printed = 1; | |
285 | #ifdef PXP | |
286 | if (outcol) | |
287 | putchar('\n'); | |
288 | #endif | |
289 | printf("%s:\n", cp); | |
290 | hadsome = 1; | |
291 | } |