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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 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.
16: */
17:
18: #ifndef lint
19: static char sccsid[] = "@(#)errorpi.c 5.3 (Berkeley) 6/29/88";
20: #endif /* not lint */
21:
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)
141: reg char *string;
142: {
143: for (; *string && isdigit(*string); string++)
144: continue;
145: return(*string == '\0');
146: }
147: boolean instringset(member, set)
148: char *member;
149: reg char **set;
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)
171: reg char *string;
172: {
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;
191:
192: if (wordc < 2)
193: return (C_UNKNOWN);
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;
222: (void)substitute(wordv[2], '^', '|');
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: }
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