Annotation of src/usr.bin/error/pi.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $ */
1.1 deraadt 2: /* $NetBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93";
40: #endif
1.2 ! deraadt 41: static char rcsid[] = "$OpenBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $";
1.1 deraadt 42: #endif /* not lint */
43:
44: #include <stdio.h>
45: #include <ctype.h>
46: #include <string.h>
47: #include "error.h"
48:
49: extern char *currentfilename;
50: static char *c_linenumber;
51: static char *unk_hdr[] = {"In", "program", "???"};
52: static char **c_header = &unk_hdr[0];
53:
54: /*
55: * Attempt to handle error messages produced by pi (and by pc)
56: *
57: * problem #1: There is no file name available when a file does not
58: * use a #include; this will have to be given to error
59: * in the command line.
60: * problem #2: pi doesn't always tell you what line number
61: * a error refers to; for example during the tree
62: * walk phase of code generation and error detection,
63: * an error can refer to "variable foo in procedure bletch"
64: * without giving a line number
65: * problem #3: line numbers, when available, are attached to
66: * the source line, along with the source line itself
67: * These line numbers must be extracted, and
68: * the source line thrown away.
69: * problem #4: Some error messages produce more than one line number
70: * on the same message.
71: * There are only two (I think):
72: * %s undefined on line%s
73: * %s improperly used on line%s
74: * here, the %s makes line plural or singular.
75: *
76: * Here are the error strings used in pi version 1.2 that can refer
77: * to a file name or line number:
78: *
79: * Multiply defined label in case, lines %d and %d
80: * Goto %s from line %d is into a structured statement
81: * End matched %s on line %d
82: * Inserted keyword end matching %s on line %d
83: *
84: * Here are the general pi patterns recognized:
85: * define piptr == -.*^-.*
86: * define msg = .*
87: * define digit = [0-9]
88: * definename = .*
89: * define date_format letter*3 letter*3 (digit | (digit digit))
90: * (digit | (digit digit)):digit*2 digit*4
91: *
92: * {e,E} (piptr) (msg) Encounter an error during textual scan
93: * E {digit}* - (msg) Have an error message that refers to a new line
94: * E - msg Have an error message that refers to current
95: * function, program or procedure
96: * (date_format) (name): When switch compilation files
97: * ... (msg) When refer to the previous line
98: * 'In' ('procedure'|'function'|'program') (name):
99: * pi is now complaining about 2nd pass errors.
100: *
101: * Here is the output from a compilation
102: *
103: *
104: * 2 var i:integer;
105: * e --------------^--- Inserted ';'
106: * E 2 - All variables must be declared in one var part
107: * E 5 - Include filename must end in .i
108: * Mon Apr 21 15:56 1980 test.h:
109: * 2 begin
110: * e ------^--- Inserted ';'
111: * Mon Apr 21 16:06 1980 test.p:
112: * E 2 - Function type must be specified
113: * 6 procedure foo(var x:real);
114: * e ------^--- Inserted ';'
115: * In function bletch:
116: * E - No assignment to the function variable
117: * w - variable x is never used
118: * E 6 - foo is already defined in this block
119: * In procedure foo:
120: * w - variable x is neither used nor set
121: * 9 z : = 23;
122: * E --------------^--- Undefined variable
123: * 10 y = [1];
124: * e ----------------^--- Inserted ':'
125: * 13 z := 345.;
126: * e -----------------------^--- Digits required after decimal point
127: * E 10 - Constant set involved in non set context
128: * E 11 - Type clash: real is incompatible with integer
129: * ... Type of expression clashed with type of variable in assignment
130: * E 12 - Parameter type not identical to type of var parameter x of foo
131: * In program mung:
132: * w - variable y is never used
133: * w - type foo is never used
134: * w - function bletch is never used
135: * E - z undefined on lines 9 13
136: */
137: char *Months[] = {
138: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
139: "Jul", "Aug", "Sep", "Oct","Nov", "Dec",
140: 0
141: };
142: char *Days[] = {
143: "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
144: };
145: char *Piroutines[] = {
146: "program", "function", "procedure", 0
147: };
148:
149:
150: static boolean structured, multiple;
151:
152: char *pi_Endmatched[] = {"End", "matched"};
153: char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
154:
155: char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
156: char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
157:
158: char *pi_und1[] = {"undefined", "on", "line"};
159: char *pi_und2[] = {"undefined", "on", "lines"};
160: char *pi_imp1[] = {"improperly", "used", "on", "line"};
161: char *pi_imp2[] = {"improperly", "used", "on", "lines"};
162:
163: boolean alldigits(string)
164: reg char *string;
165: {
166: for (; *string && isdigit(*string); string++)
167: continue;
168: return(*string == '\0');
169: }
170: boolean instringset(member, set)
171: char *member;
172: reg char **set;
173: {
174: for(; *set; set++){
175: if (strcmp(*set, member) == 0)
176: return(TRUE);
177: }
178: return(FALSE);
179: }
180:
181: boolean isdateformat(wordc, wordv)
182: int wordc;
183: char **wordv;
184: {
185: return(
186: (wordc == 5)
187: && (instringset(wordv[0], Days))
188: && (instringset(wordv[1], Months))
189: && (alldigits(wordv[2]))
190: && (alldigits(wordv[4])) );
191: }
192:
193: boolean piptr(string)
194: reg char *string;
195: {
196: if (*string != '-')
197: return(FALSE);
198: while (*string && *string == '-')
199: string++;
200: if (*string != '^')
201: return(FALSE);
202: string++;
203: while (*string && *string == '-')
204: string++;
205: return(*string == '\0');
206: }
207:
208: extern int wordc;
209: extern char **wordv;
210:
211: Errorclass pi()
212: {
213: char **nwordv;
214:
215: if (wordc < 2)
216: return (C_UNKNOWN);
217: if ( ( strlen(wordv[1]) == 1)
218: && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') )
219: && ( piptr(wordv[2]) )
220: ) {
221: boolean longpiptr = 0;
222: /*
223: * We have recognized a first pass error of the form:
224: * letter ------^---- message
225: *
226: * turn into an error message of the form:
227: *
228: * file line 'pascal errortype' letter \n |---- message
229: * or of the form:
230: * file line letter |---- message
231: * when there are strlen("(*[pi]") or more
232: * preceding '-' on the error pointer.
233: *
234: * Where the | is intended to be a down arrow, so that
235: * the pi error messages can be inserted above the
236: * line in error, instead of below. (All of the other
237: * langauges put thier messages before the source line,
238: * instead of after it as does pi.)
239: *
240: * where the pointer to the error has been truncated
241: * by 6 characters to account for the fact that
242: * the pointer points into a tab preceded input line.
243: */
244: language = INPI;
245: (void)substitute(wordv[2], '^', '|');
246: longpiptr = position(wordv[2],'|') > (6+8);
247: nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
248: nwordv[0] = strsave(currentfilename);
249: nwordv[1] = strsave(c_linenumber);
250: if (!longpiptr){
251: nwordv[2] = "pascal errortype";
252: nwordv[3] = wordv[1];
253: nwordv[4] = strsave("%%%\n");
254: if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
255: nwordv[5] += (8-2); /* bump over 6 characters */
256: }
257: wordv = nwordv - 1; /* convert to 1 based */
258: wordc += longpiptr ? 2 : 4;
259: return(C_TRUE);
260: }
261: if ( (wordc >= 4)
262: && (strlen(wordv[1]) == 1)
263: && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') )
264: && (alldigits(wordv[2]))
265: && (strlen(wordv[3]) == 1)
266: && (wordv[3][0] == '-')
267: ){
268: /*
269: * Message of the form: letter linenumber - message
270: * Turn into form: filename linenumber letter - message
271: */
272: language = INPI;
273: nwordv = wordvsplice(1, wordc, wordv + 1);
274: nwordv[0] = strsave(currentfilename);
275: nwordv[1] = wordv[2];
276: nwordv[2] = wordv[1];
277: c_linenumber = wordv[2];
278: wordc += 1;
279: wordv = nwordv - 1;
280: return(C_TRUE);
281: }
282: if ( (wordc >= 3)
283: && (strlen(wordv[1]) == 1)
284: && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') )
285: && (strlen(wordv[2]) == 1)
286: && (wordv[2][0] == '-')
287: ) {
288: /*
289: * Message of the form: letter - message
290: * This happens only when we are traversing the tree
291: * during the second pass of pi, and discover semantic
292: * errors.
293: *
294: * We have already (presumably) saved the header message
295: * and can now construct a nulled error message for the
296: * current file.
297: *
298: * Turns into a message of the form:
299: * filename (header) letter - message
300: *
301: * First, see if it is a message referring to more than
302: * one line number. Only of the form:
303: * %s undefined on line%s
304: * %s improperly used on line%s
305: */
306: boolean undefined = 0;
307: int wordindex;
308:
309: language = INPI;
310: if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
311: || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
312: || (wordvcmp(wordv+2, 4, pi_imp1) == 0)
313: || (wordvcmp(wordv+2, 4, pi_imp2) == 0)
314: ){
315: for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
316: wordindex++){
317: nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
318: nwordv[0] = strsave(currentfilename);
319: nwordv[1] = wordv[wordindex];
320: if (wordindex != wordc)
321: erroradd(undefined ? 4 : 5, nwordv,
322: C_TRUE, C_UNKNOWN);
323: }
324: wordc = undefined ? 4 : 5;
325: wordv = nwordv - 1;
326: return(C_TRUE);
327: }
328:
329: nwordv = wordvsplice(1+3, wordc, wordv+1);
330: nwordv[0] = strsave(currentfilename);
331: nwordv[1] = strsave(c_header[0]);
332: nwordv[2] = strsave(c_header[1]);
333: nwordv[3] = strsave(c_header[2]);
334: wordv = nwordv - 1;
335: wordc += 1 + 3;
336: return(C_THISFILE);
337: }
338: if (strcmp(wordv[1], "...") == 0){
339: /*
340: * have a continuation error message
341: * of the form: ... message
342: * Turn into form : filename linenumber message
343: */
344: language = INPI;
345: nwordv = wordvsplice(1, wordc, wordv+1);
346: nwordv[0] = strsave(currentfilename);
347: nwordv[1] = strsave(c_linenumber);
348: wordv = nwordv - 1;
349: wordc += 1;
350: return(C_TRUE);
351: }
352: if( (wordc == 6)
353: && (lastchar(wordv[6]) == ':')
354: && (isdateformat(5, wordv + 1))
355: ){
356: /*
357: * Have message that tells us we have changed files
358: */
359: language = INPI;
360: currentfilename = strsave(wordv[6]);
361: clob_last(currentfilename, '\0');
362: return(C_SYNC);
363: }
364: if( (wordc == 3)
365: && (strcmp(wordv[1], "In") == 0)
366: && (lastchar(wordv[3]) == ':')
367: && (instringset(wordv[2], Piroutines))
368: ) {
369: language = INPI;
370: c_header = wordvsplice(0, wordc, wordv+1);
371: return(C_SYNC);
372: }
373: /*
374: * now, check for just the line number followed by the text
375: */
376: if (alldigits(wordv[1])){
377: language = INPI;
378: c_linenumber = wordv[1];
379: return(C_IGNORE);
380: }
381: /*
382: * Attempt to match messages refering to a line number
383: *
384: * Multiply defined label in case, lines %d and %d
385: * Goto %s from line %d is into a structured statement
386: * End matched %s on line %d
387: * Inserted keyword end matching %s on line %d
388: */
389: multiple = structured = 0;
390: if (
391: ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
392: || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
393: || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
394: || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
395: ){
396: language = INPI;
397: nwordv = wordvsplice(2, wordc, wordv+1);
398: nwordv[0] = strsave(currentfilename);
399: nwordv[1] = structured ? wordv [5] : wordv[wordc];
400: wordc += 2;
401: wordv = nwordv - 1;
402: if (!multiple)
403: return(C_TRUE);
404: erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
405: nwordv = wordvsplice(0, wordc, nwordv);
406: nwordv[1] = wordv[wordc - 2];
407: return(C_TRUE);
408: }
409: return(C_UNKNOWN);
410: }
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