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442fe3bf DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
c9bf2796 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
9c50374f KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
442fe3bf DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
9c50374f | 19 | static char sccsid[] = "@(#)pi.c 5.3 (Berkeley) %G%"; |
c9bf2796 | 20 | #endif /* not lint */ |
442fe3bf | 21 | |
5df70589 BJ |
22 | #include <stdio.h> |
23 | #include <ctype.h> | |
24 | #include "error.h" | |
25 | ||
26 | extern char *currentfilename; | |
27 | static char *c_linenumber; | |
28 | static char *unk_hdr[] = {"In", "program", "???"}; | |
29 | static char **c_header = &unk_hdr[0]; | |
30 | ||
31 | /* | |
32 | * Attempt to handle error messages produced by pi (and by pc) | |
33 | * | |
34 | * problem #1: There is no file name available when a file does not | |
35 | * use a #include; this will have to be given to error | |
36 | * in the command line. | |
37 | * problem #2: pi doesn't always tell you what line number | |
38 | * a error refers to; for example during the tree | |
39 | * walk phase of code generation and error detection, | |
40 | * an error can refer to "variable foo in procedure bletch" | |
41 | * without giving a line number | |
42 | * problem #3: line numbers, when available, are attached to | |
43 | * the source line, along with the source line itself | |
44 | * These line numbers must be extracted, and | |
45 | * the source line thrown away. | |
46 | * problem #4: Some error messages produce more than one line number | |
47 | * on the same message. | |
48 | * There are only two (I think): | |
49 | * %s undefined on line%s | |
50 | * %s improperly used on line%s | |
51 | * here, the %s makes line plural or singular. | |
52 | * | |
53 | * Here are the error strings used in pi version 1.2 that can refer | |
54 | * to a file name or line number: | |
55 | * | |
56 | * Multiply defined label in case, lines %d and %d | |
57 | * Goto %s from line %d is into a structured statement | |
58 | * End matched %s on line %d | |
59 | * Inserted keyword end matching %s on line %d | |
60 | * | |
61 | * Here are the general pi patterns recognized: | |
62 | * define piptr == -.*^-.* | |
63 | * define msg = .* | |
64 | * define digit = [0-9] | |
65 | * definename = .* | |
66 | * define date_format letter*3 letter*3 (digit | (digit digit)) | |
67 | * (digit | (digit digit)):digit*2 digit*4 | |
68 | * | |
69 | * {e,E} (piptr) (msg) Encounter an error during textual scan | |
70 | * E {digit}* - (msg) Have an error message that refers to a new line | |
71 | * E - msg Have an error message that refers to current | |
72 | * function, program or procedure | |
73 | * (date_format) (name): When switch compilation files | |
74 | * ... (msg) When refer to the previous line | |
75 | * 'In' ('procedure'|'function'|'program') (name): | |
76 | * pi is now complaining about 2nd pass errors. | |
77 | * | |
78 | * Here is the output from a compilation | |
79 | * | |
80 | * | |
81 | * 2 var i:integer; | |
82 | * e --------------^--- Inserted ';' | |
83 | * E 2 - All variables must be declared in one var part | |
84 | * E 5 - Include filename must end in .i | |
85 | * Mon Apr 21 15:56 1980 test.h: | |
86 | * 2 begin | |
87 | * e ------^--- Inserted ';' | |
88 | * Mon Apr 21 16:06 1980 test.p: | |
89 | * E 2 - Function type must be specified | |
90 | * 6 procedure foo(var x:real); | |
91 | * e ------^--- Inserted ';' | |
92 | * In function bletch: | |
93 | * E - No assignment to the function variable | |
94 | * w - variable x is never used | |
95 | * E 6 - foo is already defined in this block | |
96 | * In procedure foo: | |
97 | * w - variable x is neither used nor set | |
98 | * 9 z : = 23; | |
99 | * E --------------^--- Undefined variable | |
100 | * 10 y = [1]; | |
101 | * e ----------------^--- Inserted ':' | |
102 | * 13 z := 345.; | |
103 | * e -----------------------^--- Digits required after decimal point | |
104 | * E 10 - Constant set involved in non set context | |
105 | * E 11 - Type clash: real is incompatible with integer | |
106 | * ... Type of expression clashed with type of variable in assignment | |
107 | * E 12 - Parameter type not identical to type of var parameter x of foo | |
108 | * In program mung: | |
109 | * w - variable y is never used | |
110 | * w - type foo is never used | |
111 | * w - function bletch is never used | |
112 | * E - z undefined on lines 9 13 | |
113 | */ | |
114 | char *Months[] = { | |
115 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
116 | "Jul", "Aug", "Sep", "Oct","Nov", "Dec", | |
117 | 0 | |
118 | }; | |
119 | char *Days[] = { | |
120 | "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 | |
121 | }; | |
122 | char *Piroutines[] = { | |
123 | "program", "function", "procedure", 0 | |
124 | }; | |
125 | ||
126 | ||
127 | static boolean structured, multiple; | |
128 | ||
129 | char *pi_Endmatched[] = {"End", "matched"}; | |
130 | char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; | |
131 | ||
132 | char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; | |
133 | char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; | |
134 | ||
135 | char *pi_und1[] = {"undefined", "on", "line"}; | |
136 | char *pi_und2[] = {"undefined", "on", "lines"}; | |
137 | char *pi_imp1[] = {"improperly", "used", "on", "line"}; | |
138 | char *pi_imp2[] = {"improperly", "used", "on", "lines"}; | |
139 | ||
140 | boolean alldigits(string) | |
58195f21 | 141 | reg char *string; |
5df70589 BJ |
142 | { |
143 | for (; *string && isdigit(*string); string++) | |
144 | continue; | |
145 | return(*string == '\0'); | |
146 | } | |
147 | boolean instringset(member, set) | |
58195f21 RH |
148 | char *member; |
149 | reg char **set; | |
5df70589 BJ |
150 | { |
151 | for(; *set; set++){ | |
152 | if (strcmp(*set, member) == 0) | |
153 | return(TRUE); | |
154 | } | |
155 | return(FALSE); | |
156 | } | |
157 | ||
158 | boolean isdateformat(wordc, wordv) | |
159 | int wordc; | |
160 | char **wordv; | |
161 | { | |
162 | return( | |
163 | (wordc == 5) | |
164 | && (instringset(wordv[0], Days)) | |
165 | && (instringset(wordv[1], Months)) | |
166 | && (alldigits(wordv[2])) | |
167 | && (alldigits(wordv[4])) ); | |
168 | } | |
169 | ||
170 | boolean piptr(string) | |
58195f21 | 171 | reg char *string; |
5df70589 | 172 | { |
5df70589 BJ |
173 | if (*string != '-') |
174 | return(FALSE); | |
175 | while (*string && *string == '-') | |
176 | string++; | |
177 | if (*string != '^') | |
178 | return(FALSE); | |
179 | string++; | |
180 | while (*string && *string == '-') | |
181 | string++; | |
182 | return(*string == '\0'); | |
183 | } | |
184 | ||
185 | extern int wordc; | |
186 | extern char **wordv; | |
187 | ||
188 | Errorclass pi() | |
189 | { | |
190 | char **nwordv; | |
5df70589 | 191 | |
52ee5750 SL |
192 | if (wordc < 2) |
193 | return (C_UNKNOWN); | |
5df70589 BJ |
194 | if ( ( strlen(wordv[1]) == 1) |
195 | && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) | |
196 | && ( piptr(wordv[2]) ) | |
197 | ) { | |
198 | boolean longpiptr = 0; | |
199 | /* | |
200 | * We have recognized a first pass error of the form: | |
201 | * letter ------^---- message | |
202 | * | |
203 | * turn into an error message of the form: | |
204 | * | |
205 | * file line 'pascal errortype' letter \n |---- message | |
206 | * or of the form: | |
207 | * file line letter |---- message | |
208 | * when there are strlen("(*[pi]") or more | |
209 | * preceding '-' on the error pointer. | |
210 | * | |
211 | * Where the | is intended to be a down arrow, so that | |
212 | * the pi error messages can be inserted above the | |
213 | * line in error, instead of below. (All of the other | |
214 | * langauges put thier messages before the source line, | |
215 | * instead of after it as does pi.) | |
216 | * | |
217 | * where the pointer to the error has been truncated | |
218 | * by 6 characters to account for the fact that | |
219 | * the pointer points into a tab preceded input line. | |
220 | */ | |
221 | language = INPI; | |
58195f21 | 222 | (void)substitute(wordv[2], '^', '|'); |
5df70589 BJ |
223 | longpiptr = position(wordv[2],'|') > (6+8); |
224 | nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); | |
225 | nwordv[0] = strsave(currentfilename); | |
226 | nwordv[1] = strsave(c_linenumber); | |
227 | if (!longpiptr){ | |
228 | nwordv[2] = "pascal errortype"; | |
229 | nwordv[3] = wordv[1]; | |
230 | nwordv[4] = strsave("%%%\n"); | |
231 | if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ | |
232 | nwordv[5] += (8-2); /* bump over 6 characters */ | |
233 | } | |
234 | wordv = nwordv - 1; /* convert to 1 based */ | |
235 | wordc += longpiptr ? 2 : 4; | |
236 | return(C_TRUE); | |
237 | } | |
238 | if ( (wordc >= 4) | |
239 | && (strlen(wordv[1]) == 1) | |
240 | && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) | |
241 | && (alldigits(wordv[2])) | |
242 | && (strlen(wordv[3]) == 1) | |
243 | && (wordv[3][0] == '-') | |
244 | ){ | |
245 | /* | |
246 | * Message of the form: letter linenumber - message | |
247 | * Turn into form: filename linenumber letter - message | |
248 | */ | |
249 | language = INPI; | |
250 | nwordv = wordvsplice(1, wordc, wordv + 1); | |
251 | nwordv[0] = strsave(currentfilename); | |
252 | nwordv[1] = wordv[2]; | |
253 | nwordv[2] = wordv[1]; | |
254 | c_linenumber = wordv[2]; | |
255 | wordc += 1; | |
256 | wordv = nwordv - 1; | |
257 | return(C_TRUE); | |
258 | } | |
259 | if ( (wordc >= 3) | |
260 | && (strlen(wordv[1]) == 1) | |
261 | && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) | |
262 | && (strlen(wordv[2]) == 1) | |
263 | && (wordv[2][0] == '-') | |
264 | ) { | |
265 | /* | |
266 | * Message of the form: letter - message | |
267 | * This happens only when we are traversing the tree | |
268 | * during the second pass of pi, and discover semantic | |
269 | * errors. | |
270 | * | |
271 | * We have already (presumably) saved the header message | |
272 | * and can now construct a nulled error message for the | |
273 | * current file. | |
274 | * | |
275 | * Turns into a message of the form: | |
276 | * filename (header) letter - message | |
277 | * | |
278 | * First, see if it is a message referring to more than | |
279 | * one line number. Only of the form: | |
280 | * %s undefined on line%s | |
281 | * %s improperly used on line%s | |
282 | */ | |
283 | boolean undefined = 0; | |
284 | int wordindex; | |
285 | ||
286 | language = INPI; | |
287 | if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) | |
288 | || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) | |
289 | || (wordvcmp(wordv+2, 4, pi_imp1) == 0) | |
290 | || (wordvcmp(wordv+2, 4, pi_imp2) == 0) | |
291 | ){ | |
292 | for (wordindex = undefined ? 5 : 6; wordindex <= wordc; | |
293 | wordindex++){ | |
294 | nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); | |
295 | nwordv[0] = strsave(currentfilename); | |
296 | nwordv[1] = wordv[wordindex]; | |
297 | if (wordindex != wordc) | |
298 | erroradd(undefined ? 4 : 5, nwordv, | |
299 | C_TRUE, C_UNKNOWN); | |
300 | } | |
301 | wordc = undefined ? 4 : 5; | |
302 | wordv = nwordv - 1; | |
303 | return(C_TRUE); | |
304 | } | |
305 | ||
306 | nwordv = wordvsplice(1+3, wordc, wordv+1); | |
307 | nwordv[0] = strsave(currentfilename); | |
308 | nwordv[1] = strsave(c_header[0]); | |
309 | nwordv[2] = strsave(c_header[1]); | |
310 | nwordv[3] = strsave(c_header[2]); | |
311 | wordv = nwordv - 1; | |
312 | wordc += 1 + 3; | |
313 | return(C_THISFILE); | |
314 | } | |
315 | if (strcmp(wordv[1], "...") == 0){ | |
316 | /* | |
317 | * have a continuation error message | |
318 | * of the form: ... message | |
319 | * Turn into form : filename linenumber message | |
320 | */ | |
321 | language = INPI; | |
322 | nwordv = wordvsplice(1, wordc, wordv+1); | |
323 | nwordv[0] = strsave(currentfilename); | |
324 | nwordv[1] = strsave(c_linenumber); | |
325 | wordv = nwordv - 1; | |
326 | wordc += 1; | |
327 | return(C_TRUE); | |
328 | } | |
329 | if( (wordc == 6) | |
330 | && (lastchar(wordv[6]) == ':') | |
331 | && (isdateformat(5, wordv + 1)) | |
332 | ){ | |
333 | /* | |
334 | * Have message that tells us we have changed files | |
335 | */ | |
336 | language = INPI; | |
337 | currentfilename = strsave(wordv[6]); | |
338 | clob_last(currentfilename, '\0'); | |
339 | return(C_SYNC); | |
340 | } | |
341 | if( (wordc == 3) | |
342 | && (strcmp(wordv[1], "In") == 0) | |
343 | && (lastchar(wordv[3]) == ':') | |
344 | && (instringset(wordv[2], Piroutines)) | |
345 | ) { | |
346 | language = INPI; | |
347 | c_header = wordvsplice(0, wordc, wordv+1); | |
348 | return(C_SYNC); | |
349 | } | |
350 | /* | |
351 | * now, check for just the line number followed by the text | |
352 | */ | |
353 | if (alldigits(wordv[1])){ | |
354 | language = INPI; | |
355 | c_linenumber = wordv[1]; | |
356 | return(C_IGNORE); | |
357 | } | |
358 | /* | |
359 | * Attempt to match messages refering to a line number | |
360 | * | |
361 | * Multiply defined label in case, lines %d and %d | |
362 | * Goto %s from line %d is into a structured statement | |
363 | * End matched %s on line %d | |
364 | * Inserted keyword end matching %s on line %d | |
365 | */ | |
366 | multiple = structured = 0; | |
367 | if ( | |
368 | ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) | |
369 | || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) | |
370 | || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) | |
371 | || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) | |
372 | ){ | |
373 | language = INPI; | |
374 | nwordv = wordvsplice(2, wordc, wordv+1); | |
375 | nwordv[0] = strsave(currentfilename); | |
376 | nwordv[1] = structured ? wordv [5] : wordv[wordc]; | |
377 | wordc += 2; | |
378 | wordv = nwordv - 1; | |
379 | if (!multiple) | |
380 | return(C_TRUE); | |
381 | erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); | |
382 | nwordv = wordvsplice(0, wordc, nwordv); | |
383 | nwordv[1] = wordv[wordc - 2]; | |
384 | return(C_TRUE); | |
385 | } | |
386 | return(C_UNKNOWN); | |
387 | } |