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1.1 root 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 are permitted
6: * provided that: (1) source distributions retain this entire copyright
7: * notice and comment, and (2) distributions including binaries display
8: * the following acknowledgement: ``This product includes software
9: * developed by the University of California, Berkeley and its contributors''
10: * in the documentation or other materials provided with the distribution
11: * and in all advertising materials mentioning features or use of this
12: * software. Neither the name of the University nor the names of its
13: * contributors may be used to endorse or promote products derived
14: * from this software without specific prior written permission.
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
18: */
19:
20: #ifndef lint
21: static char sccsid[] = "@(#)errorpi.c 5.4 (Berkeley) 6/1/90";
22: #endif /* not lint */
23:
24: #include <stdio.h>
25: #include <ctype.h>
26: #include "error.h"
27:
28: extern char *currentfilename;
29: static char *c_linenumber;
30: static char *unk_hdr[] = {"In", "program", "???"};
31: static char **c_header = &unk_hdr[0];
32:
33: /*
34: * Attempt to handle error messages produced by pi (and by pc)
35: *
36: * problem #1: There is no file name available when a file does not
37: * use a #include; this will have to be given to error
38: * in the command line.
39: * problem #2: pi doesn't always tell you what line number
40: * a error refers to; for example during the tree
41: * walk phase of code generation and error detection,
42: * an error can refer to "variable foo in procedure bletch"
43: * without giving a line number
44: * problem #3: line numbers, when available, are attached to
45: * the source line, along with the source line itself
46: * These line numbers must be extracted, and
47: * the source line thrown away.
48: * problem #4: Some error messages produce more than one line number
49: * on the same message.
50: * There are only two (I think):
51: * %s undefined on line%s
52: * %s improperly used on line%s
53: * here, the %s makes line plural or singular.
54: *
55: * Here are the error strings used in pi version 1.2 that can refer
56: * to a file name or line number:
57: *
58: * Multiply defined label in case, lines %d and %d
59: * Goto %s from line %d is into a structured statement
60: * End matched %s on line %d
61: * Inserted keyword end matching %s on line %d
62: *
63: * Here are the general pi patterns recognized:
64: * define piptr == -.*^-.*
65: * define msg = .*
66: * define digit = [0-9]
67: * definename = .*
68: * define date_format letter*3 letter*3 (digit | (digit digit))
69: * (digit | (digit digit)):digit*2 digit*4
70: *
71: * {e,E} (piptr) (msg) Encounter an error during textual scan
72: * E {digit}* - (msg) Have an error message that refers to a new line
73: * E - msg Have an error message that refers to current
74: * function, program or procedure
75: * (date_format) (name): When switch compilation files
76: * ... (msg) When refer to the previous line
77: * 'In' ('procedure'|'function'|'program') (name):
78: * pi is now complaining about 2nd pass errors.
79: *
80: * Here is the output from a compilation
81: *
82: *
83: * 2 var i:integer;
84: * e --------------^--- Inserted ';'
85: * E 2 - All variables must be declared in one var part
86: * E 5 - Include filename must end in .i
87: * Mon Apr 21 15:56 1980 test.h:
88: * 2 begin
89: * e ------^--- Inserted ';'
90: * Mon Apr 21 16:06 1980 test.p:
91: * E 2 - Function type must be specified
92: * 6 procedure foo(var x:real);
93: * e ------^--- Inserted ';'
94: * In function bletch:
95: * E - No assignment to the function variable
96: * w - variable x is never used
97: * E 6 - foo is already defined in this block
98: * In procedure foo:
99: * w - variable x is neither used nor set
100: * 9 z : = 23;
101: * E --------------^--- Undefined variable
102: * 10 y = [1];
103: * e ----------------^--- Inserted ':'
104: * 13 z := 345.;
105: * e -----------------------^--- Digits required after decimal point
106: * E 10 - Constant set involved in non set context
107: * E 11 - Type clash: real is incompatible with integer
108: * ... Type of expression clashed with type of variable in assignment
109: * E 12 - Parameter type not identical to type of var parameter x of foo
110: * In program mung:
111: * w - variable y is never used
112: * w - type foo is never used
113: * w - function bletch is never used
114: * E - z undefined on lines 9 13
115: */
116: char *Months[] = {
117: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
118: "Jul", "Aug", "Sep", "Oct","Nov", "Dec",
119: 0
120: };
121: char *Days[] = {
122: "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
123: };
124: char *Piroutines[] = {
125: "program", "function", "procedure", 0
126: };
127:
128:
129: static boolean structured, multiple;
130:
131: char *pi_Endmatched[] = {"End", "matched"};
132: char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
133:
134: char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
135: char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
136:
137: char *pi_und1[] = {"undefined", "on", "line"};
138: char *pi_und2[] = {"undefined", "on", "lines"};
139: char *pi_imp1[] = {"improperly", "used", "on", "line"};
140: char *pi_imp2[] = {"improperly", "used", "on", "lines"};
141:
142: boolean alldigits(string)
143: reg char *string;
144: {
145: for (; *string && isdigit(*string); string++)
146: continue;
147: return(*string == '\0');
148: }
149: boolean instringset(member, set)
150: char *member;
151: reg char **set;
152: {
153: for(; *set; set++){
154: if (strcmp(*set, member) == 0)
155: return(TRUE);
156: }
157: return(FALSE);
158: }
159:
160: boolean isdateformat(wordc, wordv)
161: int wordc;
162: char **wordv;
163: {
164: return(
165: (wordc == 5)
166: && (instringset(wordv[0], Days))
167: && (instringset(wordv[1], Months))
168: && (alldigits(wordv[2]))
169: && (alldigits(wordv[4])) );
170: }
171:
172: boolean piptr(string)
173: reg char *string;
174: {
175: if (*string != '-')
176: return(FALSE);
177: while (*string && *string == '-')
178: string++;
179: if (*string != '^')
180: return(FALSE);
181: string++;
182: while (*string && *string == '-')
183: string++;
184: return(*string == '\0');
185: }
186:
187: extern int wordc;
188: extern char **wordv;
189:
190: Errorclass pi()
191: {
192: char **nwordv;
193:
194: if (wordc < 2)
195: return (C_UNKNOWN);
196: if ( ( strlen(wordv[1]) == 1)
197: && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') )
198: && ( piptr(wordv[2]) )
199: ) {
200: boolean longpiptr = 0;
201: /*
202: * We have recognized a first pass error of the form:
203: * letter ------^---- message
204: *
205: * turn into an error message of the form:
206: *
207: * file line 'pascal errortype' letter \n |---- message
208: * or of the form:
209: * file line letter |---- message
210: * when there are strlen("(*[pi]") or more
211: * preceding '-' on the error pointer.
212: *
213: * Where the | is intended to be a down arrow, so that
214: * the pi error messages can be inserted above the
215: * line in error, instead of below. (All of the other
216: * langauges put thier messages before the source line,
217: * instead of after it as does pi.)
218: *
219: * where the pointer to the error has been truncated
220: * by 6 characters to account for the fact that
221: * the pointer points into a tab preceded input line.
222: */
223: language = INPI;
224: (void)substitute(wordv[2], '^', '|');
225: longpiptr = position(wordv[2],'|') > (6+8);
226: nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
227: nwordv[0] = strsave(currentfilename);
228: nwordv[1] = strsave(c_linenumber);
229: if (!longpiptr){
230: nwordv[2] = "pascal errortype";
231: nwordv[3] = wordv[1];
232: nwordv[4] = strsave("%%%\n");
233: if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
234: nwordv[5] += (8-2); /* bump over 6 characters */
235: }
236: wordv = nwordv - 1; /* convert to 1 based */
237: wordc += longpiptr ? 2 : 4;
238: return(C_TRUE);
239: }
240: if ( (wordc >= 4)
241: && (strlen(wordv[1]) == 1)
242: && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') )
243: && (alldigits(wordv[2]))
244: && (strlen(wordv[3]) == 1)
245: && (wordv[3][0] == '-')
246: ){
247: /*
248: * Message of the form: letter linenumber - message
249: * Turn into form: filename linenumber letter - message
250: */
251: language = INPI;
252: nwordv = wordvsplice(1, wordc, wordv + 1);
253: nwordv[0] = strsave(currentfilename);
254: nwordv[1] = wordv[2];
255: nwordv[2] = wordv[1];
256: c_linenumber = wordv[2];
257: wordc += 1;
258: wordv = nwordv - 1;
259: return(C_TRUE);
260: }
261: if ( (wordc >= 3)
262: && (strlen(wordv[1]) == 1)
263: && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') )
264: && (strlen(wordv[2]) == 1)
265: && (wordv[2][0] == '-')
266: ) {
267: /*
268: * Message of the form: letter - message
269: * This happens only when we are traversing the tree
270: * during the second pass of pi, and discover semantic
271: * errors.
272: *
273: * We have already (presumably) saved the header message
274: * and can now construct a nulled error message for the
275: * current file.
276: *
277: * Turns into a message of the form:
278: * filename (header) letter - message
279: *
280: * First, see if it is a message referring to more than
281: * one line number. Only of the form:
282: * %s undefined on line%s
283: * %s improperly used on line%s
284: */
285: boolean undefined = 0;
286: int wordindex;
287:
288: language = INPI;
289: if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
290: || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
291: || (wordvcmp(wordv+2, 4, pi_imp1) == 0)
292: || (wordvcmp(wordv+2, 4, pi_imp2) == 0)
293: ){
294: for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
295: wordindex++){
296: nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
297: nwordv[0] = strsave(currentfilename);
298: nwordv[1] = wordv[wordindex];
299: if (wordindex != wordc)
300: erroradd(undefined ? 4 : 5, nwordv,
301: C_TRUE, C_UNKNOWN);
302: }
303: wordc = undefined ? 4 : 5;
304: wordv = nwordv - 1;
305: return(C_TRUE);
306: }
307:
308: nwordv = wordvsplice(1+3, wordc, wordv+1);
309: nwordv[0] = strsave(currentfilename);
310: nwordv[1] = strsave(c_header[0]);
311: nwordv[2] = strsave(c_header[1]);
312: nwordv[3] = strsave(c_header[2]);
313: wordv = nwordv - 1;
314: wordc += 1 + 3;
315: return(C_THISFILE);
316: }
317: if (strcmp(wordv[1], "...") == 0){
318: /*
319: * have a continuation error message
320: * of the form: ... message
321: * Turn into form : filename linenumber message
322: */
323: language = INPI;
324: nwordv = wordvsplice(1, wordc, wordv+1);
325: nwordv[0] = strsave(currentfilename);
326: nwordv[1] = strsave(c_linenumber);
327: wordv = nwordv - 1;
328: wordc += 1;
329: return(C_TRUE);
330: }
331: if( (wordc == 6)
332: && (lastchar(wordv[6]) == ':')
333: && (isdateformat(5, wordv + 1))
334: ){
335: /*
336: * Have message that tells us we have changed files
337: */
338: language = INPI;
339: currentfilename = strsave(wordv[6]);
340: clob_last(currentfilename, '\0');
341: return(C_SYNC);
342: }
343: if( (wordc == 3)
344: && (strcmp(wordv[1], "In") == 0)
345: && (lastchar(wordv[3]) == ':')
346: && (instringset(wordv[2], Piroutines))
347: ) {
348: language = INPI;
349: c_header = wordvsplice(0, wordc, wordv+1);
350: return(C_SYNC);
351: }
352: /*
353: * now, check for just the line number followed by the text
354: */
355: if (alldigits(wordv[1])){
356: language = INPI;
357: c_linenumber = wordv[1];
358: return(C_IGNORE);
359: }
360: /*
361: * Attempt to match messages refering to a line number
362: *
363: * Multiply defined label in case, lines %d and %d
364: * Goto %s from line %d is into a structured statement
365: * End matched %s on line %d
366: * Inserted keyword end matching %s on line %d
367: */
368: multiple = structured = 0;
369: if (
370: ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
371: || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
372: || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
373: || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
374: ){
375: language = INPI;
376: nwordv = wordvsplice(2, wordc, wordv+1);
377: nwordv[0] = strsave(currentfilename);
378: nwordv[1] = structured ? wordv [5] : wordv[wordc];
379: wordc += 2;
380: wordv = nwordv - 1;
381: if (!multiple)
382: return(C_TRUE);
383: erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
384: nwordv = wordvsplice(0, wordc, nwordv);
385: nwordv[1] = wordv[wordc - 2];
386: return(C_TRUE);
387: }
388: return(C_UNKNOWN);
389: }
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