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