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442fe3bf 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 | |
8 | static char sccsid[] = "@(#)pi.c 5.1 (Berkeley) %G%"; | |
9 | #endif not lint | |
10 | ||
5df70589 BJ |
11 | #include <stdio.h> |
12 | #include <ctype.h> | |
13 | #include "error.h" | |
14 | ||
15 | extern char *currentfilename; | |
16 | static char *c_linenumber; | |
17 | static char *unk_hdr[] = {"In", "program", "???"}; | |
18 | static char **c_header = &unk_hdr[0]; | |
19 | ||
20 | /* | |
21 | * Attempt to handle error messages produced by pi (and by pc) | |
22 | * | |
23 | * problem #1: There is no file name available when a file does not | |
24 | * use a #include; this will have to be given to error | |
25 | * in the command line. | |
26 | * problem #2: pi doesn't always tell you what line number | |
27 | * a error refers to; for example during the tree | |
28 | * walk phase of code generation and error detection, | |
29 | * an error can refer to "variable foo in procedure bletch" | |
30 | * without giving a line number | |
31 | * problem #3: line numbers, when available, are attached to | |
32 | * the source line, along with the source line itself | |
33 | * These line numbers must be extracted, and | |
34 | * the source line thrown away. | |
35 | * problem #4: Some error messages produce more than one line number | |
36 | * on the same message. | |
37 | * There are only two (I think): | |
38 | * %s undefined on line%s | |
39 | * %s improperly used on line%s | |
40 | * here, the %s makes line plural or singular. | |
41 | * | |
42 | * Here are the error strings used in pi version 1.2 that can refer | |
43 | * to a file name or line number: | |
44 | * | |
45 | * Multiply defined label in case, lines %d and %d | |
46 | * Goto %s from line %d is into a structured statement | |
47 | * End matched %s on line %d | |
48 | * Inserted keyword end matching %s on line %d | |
49 | * | |
50 | * Here are the general pi patterns recognized: | |
51 | * define piptr == -.*^-.* | |
52 | * define msg = .* | |
53 | * define digit = [0-9] | |
54 | * definename = .* | |
55 | * define date_format letter*3 letter*3 (digit | (digit digit)) | |
56 | * (digit | (digit digit)):digit*2 digit*4 | |
57 | * | |
58 | * {e,E} (piptr) (msg) Encounter an error during textual scan | |
59 | * E {digit}* - (msg) Have an error message that refers to a new line | |
60 | * E - msg Have an error message that refers to current | |
61 | * function, program or procedure | |
62 | * (date_format) (name): When switch compilation files | |
63 | * ... (msg) When refer to the previous line | |
64 | * 'In' ('procedure'|'function'|'program') (name): | |
65 | * pi is now complaining about 2nd pass errors. | |
66 | * | |
67 | * Here is the output from a compilation | |
68 | * | |
69 | * | |
70 | * 2 var i:integer; | |
71 | * e --------------^--- Inserted ';' | |
72 | * E 2 - All variables must be declared in one var part | |
73 | * E 5 - Include filename must end in .i | |
74 | * Mon Apr 21 15:56 1980 test.h: | |
75 | * 2 begin | |
76 | * e ------^--- Inserted ';' | |
77 | * Mon Apr 21 16:06 1980 test.p: | |
78 | * E 2 - Function type must be specified | |
79 | * 6 procedure foo(var x:real); | |
80 | * e ------^--- Inserted ';' | |
81 | * In function bletch: | |
82 | * E - No assignment to the function variable | |
83 | * w - variable x is never used | |
84 | * E 6 - foo is already defined in this block | |
85 | * In procedure foo: | |
86 | * w - variable x is neither used nor set | |
87 | * 9 z : = 23; | |
88 | * E --------------^--- Undefined variable | |
89 | * 10 y = [1]; | |
90 | * e ----------------^--- Inserted ':' | |
91 | * 13 z := 345.; | |
92 | * e -----------------------^--- Digits required after decimal point | |
93 | * E 10 - Constant set involved in non set context | |
94 | * E 11 - Type clash: real is incompatible with integer | |
95 | * ... Type of expression clashed with type of variable in assignment | |
96 | * E 12 - Parameter type not identical to type of var parameter x of foo | |
97 | * In program mung: | |
98 | * w - variable y is never used | |
99 | * w - type foo is never used | |
100 | * w - function bletch is never used | |
101 | * E - z undefined on lines 9 13 | |
102 | */ | |
103 | char *Months[] = { | |
104 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
105 | "Jul", "Aug", "Sep", "Oct","Nov", "Dec", | |
106 | 0 | |
107 | }; | |
108 | char *Days[] = { | |
109 | "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 | |
110 | }; | |
111 | char *Piroutines[] = { | |
112 | "program", "function", "procedure", 0 | |
113 | }; | |
114 | ||
115 | ||
116 | static boolean structured, multiple; | |
117 | ||
118 | char *pi_Endmatched[] = {"End", "matched"}; | |
119 | char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; | |
120 | ||
121 | char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; | |
122 | char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; | |
123 | ||
124 | char *pi_und1[] = {"undefined", "on", "line"}; | |
125 | char *pi_und2[] = {"undefined", "on", "lines"}; | |
126 | char *pi_imp1[] = {"improperly", "used", "on", "line"}; | |
127 | char *pi_imp2[] = {"improperly", "used", "on", "lines"}; | |
128 | ||
129 | boolean alldigits(string) | |
58195f21 | 130 | reg char *string; |
5df70589 BJ |
131 | { |
132 | for (; *string && isdigit(*string); string++) | |
133 | continue; | |
134 | return(*string == '\0'); | |
135 | } | |
136 | boolean instringset(member, set) | |
58195f21 RH |
137 | char *member; |
138 | reg char **set; | |
5df70589 BJ |
139 | { |
140 | for(; *set; set++){ | |
141 | if (strcmp(*set, member) == 0) | |
142 | return(TRUE); | |
143 | } | |
144 | return(FALSE); | |
145 | } | |
146 | ||
147 | boolean isdateformat(wordc, wordv) | |
148 | int wordc; | |
149 | char **wordv; | |
150 | { | |
151 | return( | |
152 | (wordc == 5) | |
153 | && (instringset(wordv[0], Days)) | |
154 | && (instringset(wordv[1], Months)) | |
155 | && (alldigits(wordv[2])) | |
156 | && (alldigits(wordv[4])) ); | |
157 | } | |
158 | ||
159 | boolean piptr(string) | |
58195f21 | 160 | reg char *string; |
5df70589 | 161 | { |
5df70589 BJ |
162 | if (*string != '-') |
163 | return(FALSE); | |
164 | while (*string && *string == '-') | |
165 | string++; | |
166 | if (*string != '^') | |
167 | return(FALSE); | |
168 | string++; | |
169 | while (*string && *string == '-') | |
170 | string++; | |
171 | return(*string == '\0'); | |
172 | } | |
173 | ||
174 | extern int wordc; | |
175 | extern char **wordv; | |
176 | ||
177 | Errorclass pi() | |
178 | { | |
179 | char **nwordv; | |
5df70589 | 180 | |
52ee5750 SL |
181 | if (wordc < 2) |
182 | return (C_UNKNOWN); | |
5df70589 BJ |
183 | if ( ( strlen(wordv[1]) == 1) |
184 | && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) | |
185 | && ( piptr(wordv[2]) ) | |
186 | ) { | |
187 | boolean longpiptr = 0; | |
188 | /* | |
189 | * We have recognized a first pass error of the form: | |
190 | * letter ------^---- message | |
191 | * | |
192 | * turn into an error message of the form: | |
193 | * | |
194 | * file line 'pascal errortype' letter \n |---- message | |
195 | * or of the form: | |
196 | * file line letter |---- message | |
197 | * when there are strlen("(*[pi]") or more | |
198 | * preceding '-' on the error pointer. | |
199 | * | |
200 | * Where the | is intended to be a down arrow, so that | |
201 | * the pi error messages can be inserted above the | |
202 | * line in error, instead of below. (All of the other | |
203 | * langauges put thier messages before the source line, | |
204 | * instead of after it as does pi.) | |
205 | * | |
206 | * where the pointer to the error has been truncated | |
207 | * by 6 characters to account for the fact that | |
208 | * the pointer points into a tab preceded input line. | |
209 | */ | |
210 | language = INPI; | |
58195f21 | 211 | (void)substitute(wordv[2], '^', '|'); |
5df70589 BJ |
212 | longpiptr = position(wordv[2],'|') > (6+8); |
213 | nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); | |
214 | nwordv[0] = strsave(currentfilename); | |
215 | nwordv[1] = strsave(c_linenumber); | |
216 | if (!longpiptr){ | |
217 | nwordv[2] = "pascal errortype"; | |
218 | nwordv[3] = wordv[1]; | |
219 | nwordv[4] = strsave("%%%\n"); | |
220 | if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ | |
221 | nwordv[5] += (8-2); /* bump over 6 characters */ | |
222 | } | |
223 | wordv = nwordv - 1; /* convert to 1 based */ | |
224 | wordc += longpiptr ? 2 : 4; | |
225 | return(C_TRUE); | |
226 | } | |
227 | if ( (wordc >= 4) | |
228 | && (strlen(wordv[1]) == 1) | |
229 | && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) | |
230 | && (alldigits(wordv[2])) | |
231 | && (strlen(wordv[3]) == 1) | |
232 | && (wordv[3][0] == '-') | |
233 | ){ | |
234 | /* | |
235 | * Message of the form: letter linenumber - message | |
236 | * Turn into form: filename linenumber letter - message | |
237 | */ | |
238 | language = INPI; | |
239 | nwordv = wordvsplice(1, wordc, wordv + 1); | |
240 | nwordv[0] = strsave(currentfilename); | |
241 | nwordv[1] = wordv[2]; | |
242 | nwordv[2] = wordv[1]; | |
243 | c_linenumber = wordv[2]; | |
244 | wordc += 1; | |
245 | wordv = nwordv - 1; | |
246 | return(C_TRUE); | |
247 | } | |
248 | if ( (wordc >= 3) | |
249 | && (strlen(wordv[1]) == 1) | |
250 | && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) | |
251 | && (strlen(wordv[2]) == 1) | |
252 | && (wordv[2][0] == '-') | |
253 | ) { | |
254 | /* | |
255 | * Message of the form: letter - message | |
256 | * This happens only when we are traversing the tree | |
257 | * during the second pass of pi, and discover semantic | |
258 | * errors. | |
259 | * | |
260 | * We have already (presumably) saved the header message | |
261 | * and can now construct a nulled error message for the | |
262 | * current file. | |
263 | * | |
264 | * Turns into a message of the form: | |
265 | * filename (header) letter - message | |
266 | * | |
267 | * First, see if it is a message referring to more than | |
268 | * one line number. Only of the form: | |
269 | * %s undefined on line%s | |
270 | * %s improperly used on line%s | |
271 | */ | |
272 | boolean undefined = 0; | |
273 | int wordindex; | |
274 | ||
275 | language = INPI; | |
276 | if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) | |
277 | || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) | |
278 | || (wordvcmp(wordv+2, 4, pi_imp1) == 0) | |
279 | || (wordvcmp(wordv+2, 4, pi_imp2) == 0) | |
280 | ){ | |
281 | for (wordindex = undefined ? 5 : 6; wordindex <= wordc; | |
282 | wordindex++){ | |
283 | nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); | |
284 | nwordv[0] = strsave(currentfilename); | |
285 | nwordv[1] = wordv[wordindex]; | |
286 | if (wordindex != wordc) | |
287 | erroradd(undefined ? 4 : 5, nwordv, | |
288 | C_TRUE, C_UNKNOWN); | |
289 | } | |
290 | wordc = undefined ? 4 : 5; | |
291 | wordv = nwordv - 1; | |
292 | return(C_TRUE); | |
293 | } | |
294 | ||
295 | nwordv = wordvsplice(1+3, wordc, wordv+1); | |
296 | nwordv[0] = strsave(currentfilename); | |
297 | nwordv[1] = strsave(c_header[0]); | |
298 | nwordv[2] = strsave(c_header[1]); | |
299 | nwordv[3] = strsave(c_header[2]); | |
300 | wordv = nwordv - 1; | |
301 | wordc += 1 + 3; | |
302 | return(C_THISFILE); | |
303 | } | |
304 | if (strcmp(wordv[1], "...") == 0){ | |
305 | /* | |
306 | * have a continuation error message | |
307 | * of the form: ... message | |
308 | * Turn into form : filename linenumber message | |
309 | */ | |
310 | language = INPI; | |
311 | nwordv = wordvsplice(1, wordc, wordv+1); | |
312 | nwordv[0] = strsave(currentfilename); | |
313 | nwordv[1] = strsave(c_linenumber); | |
314 | wordv = nwordv - 1; | |
315 | wordc += 1; | |
316 | return(C_TRUE); | |
317 | } | |
318 | if( (wordc == 6) | |
319 | && (lastchar(wordv[6]) == ':') | |
320 | && (isdateformat(5, wordv + 1)) | |
321 | ){ | |
322 | /* | |
323 | * Have message that tells us we have changed files | |
324 | */ | |
325 | language = INPI; | |
326 | currentfilename = strsave(wordv[6]); | |
327 | clob_last(currentfilename, '\0'); | |
328 | return(C_SYNC); | |
329 | } | |
330 | if( (wordc == 3) | |
331 | && (strcmp(wordv[1], "In") == 0) | |
332 | && (lastchar(wordv[3]) == ':') | |
333 | && (instringset(wordv[2], Piroutines)) | |
334 | ) { | |
335 | language = INPI; | |
336 | c_header = wordvsplice(0, wordc, wordv+1); | |
337 | return(C_SYNC); | |
338 | } | |
339 | /* | |
340 | * now, check for just the line number followed by the text | |
341 | */ | |
342 | if (alldigits(wordv[1])){ | |
343 | language = INPI; | |
344 | c_linenumber = wordv[1]; | |
345 | return(C_IGNORE); | |
346 | } | |
347 | /* | |
348 | * Attempt to match messages refering to a line number | |
349 | * | |
350 | * Multiply defined label in case, lines %d and %d | |
351 | * Goto %s from line %d is into a structured statement | |
352 | * End matched %s on line %d | |
353 | * Inserted keyword end matching %s on line %d | |
354 | */ | |
355 | multiple = structured = 0; | |
356 | if ( | |
357 | ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) | |
358 | || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) | |
359 | || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) | |
360 | || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) | |
361 | ){ | |
362 | language = INPI; | |
363 | nwordv = wordvsplice(2, wordc, wordv+1); | |
364 | nwordv[0] = strsave(currentfilename); | |
365 | nwordv[1] = structured ? wordv [5] : wordv[wordc]; | |
366 | wordc += 2; | |
367 | wordv = nwordv - 1; | |
368 | if (!multiple) | |
369 | return(C_TRUE); | |
370 | erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); | |
371 | nwordv = wordvsplice(0, wordc, nwordv); | |
372 | nwordv[1] = wordv[wordc - 2]; | |
373 | return(C_TRUE); | |
374 | } | |
375 | return(C_UNKNOWN); | |
376 | } |