Commit | Line | Data |
---|---|---|
15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)pi.c 5.5 (Berkeley) 2/26/91"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <stdio.h> | |
39 | #include <ctype.h> | |
40 | #include <string.h> | |
41 | #include "error.h" | |
42 | ||
43 | extern char *currentfilename; | |
44 | static char *c_linenumber; | |
45 | static char *unk_hdr[] = {"In", "program", "???"}; | |
46 | static char **c_header = &unk_hdr[0]; | |
47 | ||
48 | /* | |
49 | * Attempt to handle error messages produced by pi (and by pc) | |
50 | * | |
51 | * problem #1: There is no file name available when a file does not | |
52 | * use a #include; this will have to be given to error | |
53 | * in the command line. | |
54 | * problem #2: pi doesn't always tell you what line number | |
55 | * a error refers to; for example during the tree | |
56 | * walk phase of code generation and error detection, | |
57 | * an error can refer to "variable foo in procedure bletch" | |
58 | * without giving a line number | |
59 | * problem #3: line numbers, when available, are attached to | |
60 | * the source line, along with the source line itself | |
61 | * These line numbers must be extracted, and | |
62 | * the source line thrown away. | |
63 | * problem #4: Some error messages produce more than one line number | |
64 | * on the same message. | |
65 | * There are only two (I think): | |
66 | * %s undefined on line%s | |
67 | * %s improperly used on line%s | |
68 | * here, the %s makes line plural or singular. | |
69 | * | |
70 | * Here are the error strings used in pi version 1.2 that can refer | |
71 | * to a file name or line number: | |
72 | * | |
73 | * Multiply defined label in case, lines %d and %d | |
74 | * Goto %s from line %d is into a structured statement | |
75 | * End matched %s on line %d | |
76 | * Inserted keyword end matching %s on line %d | |
77 | * | |
78 | * Here are the general pi patterns recognized: | |
79 | * define piptr == -.*^-.* | |
80 | * define msg = .* | |
81 | * define digit = [0-9] | |
82 | * definename = .* | |
83 | * define date_format letter*3 letter*3 (digit | (digit digit)) | |
84 | * (digit | (digit digit)):digit*2 digit*4 | |
85 | * | |
86 | * {e,E} (piptr) (msg) Encounter an error during textual scan | |
87 | * E {digit}* - (msg) Have an error message that refers to a new line | |
88 | * E - msg Have an error message that refers to current | |
89 | * function, program or procedure | |
90 | * (date_format) (name): When switch compilation files | |
91 | * ... (msg) When refer to the previous line | |
92 | * 'In' ('procedure'|'function'|'program') (name): | |
93 | * pi is now complaining about 2nd pass errors. | |
94 | * | |
95 | * Here is the output from a compilation | |
96 | * | |
97 | * | |
98 | * 2 var i:integer; | |
99 | * e --------------^--- Inserted ';' | |
100 | * E 2 - All variables must be declared in one var part | |
101 | * E 5 - Include filename must end in .i | |
102 | * Mon Apr 21 15:56 1980 test.h: | |
103 | * 2 begin | |
104 | * e ------^--- Inserted ';' | |
105 | * Mon Apr 21 16:06 1980 test.p: | |
106 | * E 2 - Function type must be specified | |
107 | * 6 procedure foo(var x:real); | |
108 | * e ------^--- Inserted ';' | |
109 | * In function bletch: | |
110 | * E - No assignment to the function variable | |
111 | * w - variable x is never used | |
112 | * E 6 - foo is already defined in this block | |
113 | * In procedure foo: | |
114 | * w - variable x is neither used nor set | |
115 | * 9 z : = 23; | |
116 | * E --------------^--- Undefined variable | |
117 | * 10 y = [1]; | |
118 | * e ----------------^--- Inserted ':' | |
119 | * 13 z := 345.; | |
120 | * e -----------------------^--- Digits required after decimal point | |
121 | * E 10 - Constant set involved in non set context | |
122 | * E 11 - Type clash: real is incompatible with integer | |
123 | * ... Type of expression clashed with type of variable in assignment | |
124 | * E 12 - Parameter type not identical to type of var parameter x of foo | |
125 | * In program mung: | |
126 | * w - variable y is never used | |
127 | * w - type foo is never used | |
128 | * w - function bletch is never used | |
129 | * E - z undefined on lines 9 13 | |
130 | */ | |
131 | char *Months[] = { | |
132 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
133 | "Jul", "Aug", "Sep", "Oct","Nov", "Dec", | |
134 | 0 | |
135 | }; | |
136 | char *Days[] = { | |
137 | "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 | |
138 | }; | |
139 | char *Piroutines[] = { | |
140 | "program", "function", "procedure", 0 | |
141 | }; | |
142 | ||
143 | ||
144 | static boolean structured, multiple; | |
145 | ||
146 | char *pi_Endmatched[] = {"End", "matched"}; | |
147 | char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; | |
148 | ||
149 | char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; | |
150 | char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; | |
151 | ||
152 | char *pi_und1[] = {"undefined", "on", "line"}; | |
153 | char *pi_und2[] = {"undefined", "on", "lines"}; | |
154 | char *pi_imp1[] = {"improperly", "used", "on", "line"}; | |
155 | char *pi_imp2[] = {"improperly", "used", "on", "lines"}; | |
156 | ||
157 | boolean alldigits(string) | |
158 | reg char *string; | |
159 | { | |
160 | for (; *string && isdigit(*string); string++) | |
161 | continue; | |
162 | return(*string == '\0'); | |
163 | } | |
164 | boolean instringset(member, set) | |
165 | char *member; | |
166 | reg char **set; | |
167 | { | |
168 | for(; *set; set++){ | |
169 | if (strcmp(*set, member) == 0) | |
170 | return(TRUE); | |
171 | } | |
172 | return(FALSE); | |
173 | } | |
174 | ||
175 | boolean isdateformat(wordc, wordv) | |
176 | int wordc; | |
177 | char **wordv; | |
178 | { | |
179 | return( | |
180 | (wordc == 5) | |
181 | && (instringset(wordv[0], Days)) | |
182 | && (instringset(wordv[1], Months)) | |
183 | && (alldigits(wordv[2])) | |
184 | && (alldigits(wordv[4])) ); | |
185 | } | |
186 | ||
187 | boolean piptr(string) | |
188 | reg char *string; | |
189 | { | |
190 | if (*string != '-') | |
191 | return(FALSE); | |
192 | while (*string && *string == '-') | |
193 | string++; | |
194 | if (*string != '^') | |
195 | return(FALSE); | |
196 | string++; | |
197 | while (*string && *string == '-') | |
198 | string++; | |
199 | return(*string == '\0'); | |
200 | } | |
201 | ||
202 | extern int wordc; | |
203 | extern char **wordv; | |
204 | ||
205 | Errorclass pi() | |
206 | { | |
207 | char **nwordv; | |
208 | ||
209 | if (wordc < 2) | |
210 | return (C_UNKNOWN); | |
211 | if ( ( strlen(wordv[1]) == 1) | |
212 | && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) | |
213 | && ( piptr(wordv[2]) ) | |
214 | ) { | |
215 | boolean longpiptr = 0; | |
216 | /* | |
217 | * We have recognized a first pass error of the form: | |
218 | * letter ------^---- message | |
219 | * | |
220 | * turn into an error message of the form: | |
221 | * | |
222 | * file line 'pascal errortype' letter \n |---- message | |
223 | * or of the form: | |
224 | * file line letter |---- message | |
225 | * when there are strlen("(*[pi]") or more | |
226 | * preceding '-' on the error pointer. | |
227 | * | |
228 | * Where the | is intended to be a down arrow, so that | |
229 | * the pi error messages can be inserted above the | |
230 | * line in error, instead of below. (All of the other | |
231 | * langauges put thier messages before the source line, | |
232 | * instead of after it as does pi.) | |
233 | * | |
234 | * where the pointer to the error has been truncated | |
235 | * by 6 characters to account for the fact that | |
236 | * the pointer points into a tab preceded input line. | |
237 | */ | |
238 | language = INPI; | |
239 | (void)substitute(wordv[2], '^', '|'); | |
240 | longpiptr = position(wordv[2],'|') > (6+8); | |
241 | nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); | |
242 | nwordv[0] = strsave(currentfilename); | |
243 | nwordv[1] = strsave(c_linenumber); | |
244 | if (!longpiptr){ | |
245 | nwordv[2] = "pascal errortype"; | |
246 | nwordv[3] = wordv[1]; | |
247 | nwordv[4] = strsave("%%%\n"); | |
248 | if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ | |
249 | nwordv[5] += (8-2); /* bump over 6 characters */ | |
250 | } | |
251 | wordv = nwordv - 1; /* convert to 1 based */ | |
252 | wordc += longpiptr ? 2 : 4; | |
253 | return(C_TRUE); | |
254 | } | |
255 | if ( (wordc >= 4) | |
256 | && (strlen(wordv[1]) == 1) | |
257 | && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) | |
258 | && (alldigits(wordv[2])) | |
259 | && (strlen(wordv[3]) == 1) | |
260 | && (wordv[3][0] == '-') | |
261 | ){ | |
262 | /* | |
263 | * Message of the form: letter linenumber - message | |
264 | * Turn into form: filename linenumber letter - message | |
265 | */ | |
266 | language = INPI; | |
267 | nwordv = wordvsplice(1, wordc, wordv + 1); | |
268 | nwordv[0] = strsave(currentfilename); | |
269 | nwordv[1] = wordv[2]; | |
270 | nwordv[2] = wordv[1]; | |
271 | c_linenumber = wordv[2]; | |
272 | wordc += 1; | |
273 | wordv = nwordv - 1; | |
274 | return(C_TRUE); | |
275 | } | |
276 | if ( (wordc >= 3) | |
277 | && (strlen(wordv[1]) == 1) | |
278 | && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) | |
279 | && (strlen(wordv[2]) == 1) | |
280 | && (wordv[2][0] == '-') | |
281 | ) { | |
282 | /* | |
283 | * Message of the form: letter - message | |
284 | * This happens only when we are traversing the tree | |
285 | * during the second pass of pi, and discover semantic | |
286 | * errors. | |
287 | * | |
288 | * We have already (presumably) saved the header message | |
289 | * and can now construct a nulled error message for the | |
290 | * current file. | |
291 | * | |
292 | * Turns into a message of the form: | |
293 | * filename (header) letter - message | |
294 | * | |
295 | * First, see if it is a message referring to more than | |
296 | * one line number. Only of the form: | |
297 | * %s undefined on line%s | |
298 | * %s improperly used on line%s | |
299 | */ | |
300 | boolean undefined = 0; | |
301 | int wordindex; | |
302 | ||
303 | language = INPI; | |
304 | if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) | |
305 | || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) | |
306 | || (wordvcmp(wordv+2, 4, pi_imp1) == 0) | |
307 | || (wordvcmp(wordv+2, 4, pi_imp2) == 0) | |
308 | ){ | |
309 | for (wordindex = undefined ? 5 : 6; wordindex <= wordc; | |
310 | wordindex++){ | |
311 | nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); | |
312 | nwordv[0] = strsave(currentfilename); | |
313 | nwordv[1] = wordv[wordindex]; | |
314 | if (wordindex != wordc) | |
315 | erroradd(undefined ? 4 : 5, nwordv, | |
316 | C_TRUE, C_UNKNOWN); | |
317 | } | |
318 | wordc = undefined ? 4 : 5; | |
319 | wordv = nwordv - 1; | |
320 | return(C_TRUE); | |
321 | } | |
322 | ||
323 | nwordv = wordvsplice(1+3, wordc, wordv+1); | |
324 | nwordv[0] = strsave(currentfilename); | |
325 | nwordv[1] = strsave(c_header[0]); | |
326 | nwordv[2] = strsave(c_header[1]); | |
327 | nwordv[3] = strsave(c_header[2]); | |
328 | wordv = nwordv - 1; | |
329 | wordc += 1 + 3; | |
330 | return(C_THISFILE); | |
331 | } | |
332 | if (strcmp(wordv[1], "...") == 0){ | |
333 | /* | |
334 | * have a continuation error message | |
335 | * of the form: ... message | |
336 | * Turn into form : filename linenumber message | |
337 | */ | |
338 | language = INPI; | |
339 | nwordv = wordvsplice(1, wordc, wordv+1); | |
340 | nwordv[0] = strsave(currentfilename); | |
341 | nwordv[1] = strsave(c_linenumber); | |
342 | wordv = nwordv - 1; | |
343 | wordc += 1; | |
344 | return(C_TRUE); | |
345 | } | |
346 | if( (wordc == 6) | |
347 | && (lastchar(wordv[6]) == ':') | |
348 | && (isdateformat(5, wordv + 1)) | |
349 | ){ | |
350 | /* | |
351 | * Have message that tells us we have changed files | |
352 | */ | |
353 | language = INPI; | |
354 | currentfilename = strsave(wordv[6]); | |
355 | clob_last(currentfilename, '\0'); | |
356 | return(C_SYNC); | |
357 | } | |
358 | if( (wordc == 3) | |
359 | && (strcmp(wordv[1], "In") == 0) | |
360 | && (lastchar(wordv[3]) == ':') | |
361 | && (instringset(wordv[2], Piroutines)) | |
362 | ) { | |
363 | language = INPI; | |
364 | c_header = wordvsplice(0, wordc, wordv+1); | |
365 | return(C_SYNC); | |
366 | } | |
367 | /* | |
368 | * now, check for just the line number followed by the text | |
369 | */ | |
370 | if (alldigits(wordv[1])){ | |
371 | language = INPI; | |
372 | c_linenumber = wordv[1]; | |
373 | return(C_IGNORE); | |
374 | } | |
375 | /* | |
376 | * Attempt to match messages refering to a line number | |
377 | * | |
378 | * Multiply defined label in case, lines %d and %d | |
379 | * Goto %s from line %d is into a structured statement | |
380 | * End matched %s on line %d | |
381 | * Inserted keyword end matching %s on line %d | |
382 | */ | |
383 | multiple = structured = 0; | |
384 | if ( | |
385 | ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) | |
386 | || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) | |
387 | || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) | |
388 | || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) | |
389 | ){ | |
390 | language = INPI; | |
391 | nwordv = wordvsplice(2, wordc, wordv+1); | |
392 | nwordv[0] = strsave(currentfilename); | |
393 | nwordv[1] = structured ? wordv [5] : wordv[wordc]; | |
394 | wordc += 2; | |
395 | wordv = nwordv - 1; | |
396 | if (!multiple) | |
397 | return(C_TRUE); | |
398 | erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); | |
399 | nwordv = wordvsplice(0, wordc, nwordv); | |
400 | nwordv[1] = wordv[wordc - 2]; | |
401 | return(C_TRUE); | |
402 | } | |
403 | return(C_UNKNOWN); | |
404 | } |