Annotation of src/usr.bin/error/pi.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $ */
2:
3: /*
4: * Copyright (c) 1980, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93";
39: #endif
40: static char rcsid[] = "$NetBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $";
41: #endif /* not lint */
42:
43: #include <stdio.h>
44: #include <ctype.h>
45: #include <string.h>
46: #include "error.h"
47:
48: extern char *currentfilename;
49: static char *c_linenumber;
50: static char *unk_hdr[] = {"In", "program", "???"};
51: static char **c_header = &unk_hdr[0];
52:
53: /*
54: * Attempt to handle error messages produced by pi (and by pc)
55: *
56: * problem #1: There is no file name available when a file does not
57: * use a #include; this will have to be given to error
58: * in the command line.
59: * problem #2: pi doesn't always tell you what line number
60: * a error refers to; for example during the tree
61: * walk phase of code generation and error detection,
62: * an error can refer to "variable foo in procedure bletch"
63: * without giving a line number
64: * problem #3: line numbers, when available, are attached to
65: * the source line, along with the source line itself
66: * These line numbers must be extracted, and
67: * the source line thrown away.
68: * problem #4: Some error messages produce more than one line number
69: * on the same message.
70: * There are only two (I think):
71: * %s undefined on line%s
72: * %s improperly used on line%s
73: * here, the %s makes line plural or singular.
74: *
75: * Here are the error strings used in pi version 1.2 that can refer
76: * to a file name or line number:
77: *
78: * Multiply defined label in case, lines %d and %d
79: * Goto %s from line %d is into a structured statement
80: * End matched %s on line %d
81: * Inserted keyword end matching %s on line %d
82: *
83: * Here are the general pi patterns recognized:
84: * define piptr == -.*^-.*
85: * define msg = .*
86: * define digit = [0-9]
87: * definename = .*
88: * define date_format letter*3 letter*3 (digit | (digit digit))
89: * (digit | (digit digit)):digit*2 digit*4
90: *
91: * {e,E} (piptr) (msg) Encounter an error during textual scan
92: * E {digit}* - (msg) Have an error message that refers to a new line
93: * E - msg Have an error message that refers to current
94: * function, program or procedure
95: * (date_format) (name): When switch compilation files
96: * ... (msg) When refer to the previous line
97: * 'In' ('procedure'|'function'|'program') (name):
98: * pi is now complaining about 2nd pass errors.
99: *
100: * Here is the output from a compilation
101: *
102: *
103: * 2 var i:integer;
104: * e --------------^--- Inserted ';'
105: * E 2 - All variables must be declared in one var part
106: * E 5 - Include filename must end in .i
107: * Mon Apr 21 15:56 1980 test.h:
108: * 2 begin
109: * e ------^--- Inserted ';'
110: * Mon Apr 21 16:06 1980 test.p:
111: * E 2 - Function type must be specified
112: * 6 procedure foo(var x:real);
113: * e ------^--- Inserted ';'
114: * In function bletch:
115: * E - No assignment to the function variable
116: * w - variable x is never used
117: * E 6 - foo is already defined in this block
118: * In procedure foo:
119: * w - variable x is neither used nor set
120: * 9 z : = 23;
121: * E --------------^--- Undefined variable
122: * 10 y = [1];
123: * e ----------------^--- Inserted ':'
124: * 13 z := 345.;
125: * e -----------------------^--- Digits required after decimal point
126: * E 10 - Constant set involved in non set context
127: * E 11 - Type clash: real is incompatible with integer
128: * ... Type of expression clashed with type of variable in assignment
129: * E 12 - Parameter type not identical to type of var parameter x of foo
130: * In program mung:
131: * w - variable y is never used
132: * w - type foo is never used
133: * w - function bletch is never used
134: * E - z undefined on lines 9 13
135: */
136: char *Months[] = {
137: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
138: "Jul", "Aug", "Sep", "Oct","Nov", "Dec",
139: 0
140: };
141: char *Days[] = {
142: "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
143: };
144: char *Piroutines[] = {
145: "program", "function", "procedure", 0
146: };
147:
148:
149: static boolean structured, multiple;
150:
151: char *pi_Endmatched[] = {"End", "matched"};
152: char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
153:
154: char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
155: char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
156:
157: char *pi_und1[] = {"undefined", "on", "line"};
158: char *pi_und2[] = {"undefined", "on", "lines"};
159: char *pi_imp1[] = {"improperly", "used", "on", "line"};
160: char *pi_imp2[] = {"improperly", "used", "on", "lines"};
161:
162: boolean alldigits(string)
163: reg char *string;
164: {
165: for (; *string && isdigit(*string); string++)
166: continue;
167: return(*string == '\0');
168: }
169: boolean instringset(member, set)
170: char *member;
171: reg char **set;
172: {
173: for(; *set; set++){
174: if (strcmp(*set, member) == 0)
175: return(TRUE);
176: }
177: return(FALSE);
178: }
179:
180: boolean isdateformat(wordc, wordv)
181: int wordc;
182: char **wordv;
183: {
184: return(
185: (wordc == 5)
186: && (instringset(wordv[0], Days))
187: && (instringset(wordv[1], Months))
188: && (alldigits(wordv[2]))
189: && (alldigits(wordv[4])) );
190: }
191:
192: boolean piptr(string)
193: reg char *string;
194: {
195: if (*string != '-')
196: return(FALSE);
197: while (*string && *string == '-')
198: string++;
199: if (*string != '^')
200: return(FALSE);
201: string++;
202: while (*string && *string == '-')
203: string++;
204: return(*string == '\0');
205: }
206:
207: extern int wordc;
208: extern char **wordv;
209:
210: Errorclass pi()
211: {
212: char **nwordv;
213:
214: if (wordc < 2)
215: return (C_UNKNOWN);
216: if ( ( strlen(wordv[1]) == 1)
217: && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') )
218: && ( piptr(wordv[2]) )
219: ) {
220: boolean longpiptr = 0;
221: /*
222: * We have recognized a first pass error of the form:
223: * letter ------^---- message
224: *
225: * turn into an error message of the form:
226: *
227: * file line 'pascal errortype' letter \n |---- message
228: * or of the form:
229: * file line letter |---- message
230: * when there are strlen("(*[pi]") or more
231: * preceding '-' on the error pointer.
232: *
233: * Where the | is intended to be a down arrow, so that
234: * the pi error messages can be inserted above the
235: * line in error, instead of below. (All of the other
236: * langauges put thier messages before the source line,
237: * instead of after it as does pi.)
238: *
239: * where the pointer to the error has been truncated
240: * by 6 characters to account for the fact that
241: * the pointer points into a tab preceded input line.
242: */
243: language = INPI;
244: (void)substitute(wordv[2], '^', '|');
245: longpiptr = position(wordv[2],'|') > (6+8);
246: nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
247: nwordv[0] = strsave(currentfilename);
248: nwordv[1] = strsave(c_linenumber);
249: if (!longpiptr){
250: nwordv[2] = "pascal errortype";
251: nwordv[3] = wordv[1];
252: nwordv[4] = strsave("%%%\n");
253: if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
254: nwordv[5] += (8-2); /* bump over 6 characters */
255: }
256: wordv = nwordv - 1; /* convert to 1 based */
257: wordc += longpiptr ? 2 : 4;
258: return(C_TRUE);
259: }
260: if ( (wordc >= 4)
261: && (strlen(wordv[1]) == 1)
262: && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') )
263: && (alldigits(wordv[2]))
264: && (strlen(wordv[3]) == 1)
265: && (wordv[3][0] == '-')
266: ){
267: /*
268: * Message of the form: letter linenumber - message
269: * Turn into form: filename linenumber letter - message
270: */
271: language = INPI;
272: nwordv = wordvsplice(1, wordc, wordv + 1);
273: nwordv[0] = strsave(currentfilename);
274: nwordv[1] = wordv[2];
275: nwordv[2] = wordv[1];
276: c_linenumber = wordv[2];
277: wordc += 1;
278: wordv = nwordv - 1;
279: return(C_TRUE);
280: }
281: if ( (wordc >= 3)
282: && (strlen(wordv[1]) == 1)
283: && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') )
284: && (strlen(wordv[2]) == 1)
285: && (wordv[2][0] == '-')
286: ) {
287: /*
288: * Message of the form: letter - message
289: * This happens only when we are traversing the tree
290: * during the second pass of pi, and discover semantic
291: * errors.
292: *
293: * We have already (presumably) saved the header message
294: * and can now construct a nulled error message for the
295: * current file.
296: *
297: * Turns into a message of the form:
298: * filename (header) letter - message
299: *
300: * First, see if it is a message referring to more than
301: * one line number. Only of the form:
302: * %s undefined on line%s
303: * %s improperly used on line%s
304: */
305: boolean undefined = 0;
306: int wordindex;
307:
308: language = INPI;
309: if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
310: || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
311: || (wordvcmp(wordv+2, 4, pi_imp1) == 0)
312: || (wordvcmp(wordv+2, 4, pi_imp2) == 0)
313: ){
314: for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
315: wordindex++){
316: nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
317: nwordv[0] = strsave(currentfilename);
318: nwordv[1] = wordv[wordindex];
319: if (wordindex != wordc)
320: erroradd(undefined ? 4 : 5, nwordv,
321: C_TRUE, C_UNKNOWN);
322: }
323: wordc = undefined ? 4 : 5;
324: wordv = nwordv - 1;
325: return(C_TRUE);
326: }
327:
328: nwordv = wordvsplice(1+3, wordc, wordv+1);
329: nwordv[0] = strsave(currentfilename);
330: nwordv[1] = strsave(c_header[0]);
331: nwordv[2] = strsave(c_header[1]);
332: nwordv[3] = strsave(c_header[2]);
333: wordv = nwordv - 1;
334: wordc += 1 + 3;
335: return(C_THISFILE);
336: }
337: if (strcmp(wordv[1], "...") == 0){
338: /*
339: * have a continuation error message
340: * of the form: ... message
341: * Turn into form : filename linenumber message
342: */
343: language = INPI;
344: nwordv = wordvsplice(1, wordc, wordv+1);
345: nwordv[0] = strsave(currentfilename);
346: nwordv[1] = strsave(c_linenumber);
347: wordv = nwordv - 1;
348: wordc += 1;
349: return(C_TRUE);
350: }
351: if( (wordc == 6)
352: && (lastchar(wordv[6]) == ':')
353: && (isdateformat(5, wordv + 1))
354: ){
355: /*
356: * Have message that tells us we have changed files
357: */
358: language = INPI;
359: currentfilename = strsave(wordv[6]);
360: clob_last(currentfilename, '\0');
361: return(C_SYNC);
362: }
363: if( (wordc == 3)
364: && (strcmp(wordv[1], "In") == 0)
365: && (lastchar(wordv[3]) == ':')
366: && (instringset(wordv[2], Piroutines))
367: ) {
368: language = INPI;
369: c_header = wordvsplice(0, wordc, wordv+1);
370: return(C_SYNC);
371: }
372: /*
373: * now, check for just the line number followed by the text
374: */
375: if (alldigits(wordv[1])){
376: language = INPI;
377: c_linenumber = wordv[1];
378: return(C_IGNORE);
379: }
380: /*
381: * Attempt to match messages refering to a line number
382: *
383: * Multiply defined label in case, lines %d and %d
384: * Goto %s from line %d is into a structured statement
385: * End matched %s on line %d
386: * Inserted keyword end matching %s on line %d
387: */
388: multiple = structured = 0;
389: if (
390: ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
391: || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
392: || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
393: || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
394: ){
395: language = INPI;
396: nwordv = wordvsplice(2, wordc, wordv+1);
397: nwordv[0] = strsave(currentfilename);
398: nwordv[1] = structured ? wordv [5] : wordv[wordc];
399: wordc += 2;
400: wordv = nwordv - 1;
401: if (!multiple)
402: return(C_TRUE);
403: erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
404: nwordv = wordvsplice(0, wordc, nwordv);
405: nwordv[1] = wordv[wordc - 2];
406: return(C_TRUE);
407: }
408: return(C_UNKNOWN);
409: }
![[BACK]](/icons/back.gif){kind=icon}
Return to pi.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / error