/* $NetBSD: pi.c,v 1.25 2025/07/11 22:19:54 andvar Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #ifndef lint #if 0 static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93"; #endif __RCSID("$NetBSD: pi.c,v 1.25 2025/07/11 22:19:54 andvar Exp $"); #endif /* not lint */ #include <stdio.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include "error.h" #if 0 /* not const-correct */ static char *unk_hdr[] = {"In", "program", "???"}; #else DECL_STRINGS_3(static, unk_hdr, "In", "program", "???"); #endif static char *c_linenumber; static char **c_header = &unk_hdr[0]; static bool alldigits(const char *); static bool isdateformat(int, char **); static bool instringset(const char *, const char **); static bool piptr(const char *); /* * Attempt to handle error messages produced by pi (and by pc) * * problem #1: There is no file name available when a file does not * use a #include; this will have to be given to error * in the command line. * problem #2: pi doesn't always tell you what line number * a error refers to; for example during the tree * walk phase of code generation and error detection, * an error can refer to "variable foo in procedure bletch" * without giving a line number * problem #3: line numbers, when available, are attached to * the source line, along with the source line itself * These line numbers must be extracted, and * the source line thrown away. * problem #4: Some error messages produce more than one line number * on the same message. * There are only two (I think): * %s undefined on line%s * %s improperly used on line%s * here, the %s makes line plural or singular. * * Here are the error strings used in pi version 1.2 that can refer * to a file name or line number: * * Multiply defined label in case, lines %d and %d * Goto %s from line %d is into a structured statement * End matched %s on line %d * Inserted keyword end matching %s on line %d * * Here are the general pi patterns recognized: * define piptr == -.*^-.* * define msg = .* * define digit = [0-9] * definename = .* * define date_format letter*3 letter*3 (digit | (digit digit)) * (digit | (digit digit)):digit*2 digit*4 * * {e,E} (piptr) (msg) Encounter an error during textual scan * E {digit}* - (msg) Have an error message that refers to a new line * E - msg Have an error message that refers to current * function, program or procedure * (date_format) (name): When switch compilation files * ... (msg) When refer to the previous line * 'In' ('procedure'|'function'|'program') (name): * pi is now complaining about 2nd pass errors. * * Here is the output from a compilation * * * 2 var i:integer; * e --------------^--- Inserted ';' * E 2 - All variables must be declared in one var part * E 5 - Include filename must end in .i * Mon Apr 21 15:56 1980 test.h: * 2 begin * e ------^--- Inserted ';' * Mon Apr 21 16:06 1980 test.p: * E 2 - Function type must be specified * 6 procedure foo(var x:real); * e ------^--- Inserted ';' * In function bletch: * E - No assignment to the function variable * w - variable x is never used * E 6 - foo is already defined in this block * In procedure foo: * w - variable x is neither used nor set * 9 z : = 23; * E --------------^--- Undefined variable * 10 y = [1]; * e ----------------^--- Inserted ':' * 13 z := 345.; * e -----------------------^--- Digits required after decimal point * E 10 - Constant set involved in non set context * E 11 - Type clash: real is incompatible with integer * ... Type of expression clashed with type of variable in assignment * E 12 - Parameter type not identical to type of var parameter x of foo * In program mung: * w - variable y is never used * w - type foo is never used * w - function bletch is never used * E - z undefined on lines 9 13 */ static const char *Months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL }; static const char *Days[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL }; static const char *Piroutines[] = { "program", "function", "procedure", NULL }; static bool structured, multiple; #if 0 /* not const-correct */ static char *pi_Endmatched[] = {"End", "matched"}; static char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; static char *pi_multiple[] = {"Multiply", "defined", "label", "in", "case,", "line"}; static char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; static char *pi_und1[] = {"undefined", "on", "line"}; static char *pi_und2[] = {"undefined", "on", "lines"}; static char *pi_imp1[] = {"improperly", "used", "on", "line"}; static char *pi_imp2[] = {"improperly", "used", "on", "lines"}; #else DECL_STRINGS_2(static, pi_Endmatched, "End", "matched"); DECL_STRINGS_4(static, pi_Inserted, "Inserted", "keyword", "end", "matching"); DECL_STRINGS_6(static, pi_multiple, "Multiply", "defined", "label", "in", "case,", "line"); DECL_STRINGS_5(static, pi_structured, "is", "into", "a", "structured", "statement"); DECL_STRINGS_3(static, pi_und1, "undefined", "on", "line"); DECL_STRINGS_3(static, pi_und2, "undefined", "on", "lines"); DECL_STRINGS_4(static, pi_imp1, "improperly", "used", "on", "line"); DECL_STRINGS_4(static, pi_imp2, "improperly", "used", "on", "lines"); #endif static bool alldigits(const char *string) { for (; *string != '\0' && isdigit((unsigned char)*string); string++) continue; return *string == '\0'; } static bool instringset(const char *member, const char **set) { for (; *set != NULL; set++) if (strcmp(*set, member) == 0) return true; return false; } static bool isdateformat(int wordc, char **wordv) { return wordc == 5 && instringset(wordv[0], Days) && instringset(wordv[1], Months) && alldigits(wordv[2]) && alldigits(wordv[4]); } static bool piptr(const char *string) { if (*string != '-') return false; while (*string == '-') string++; if (*string != '^') return false; string++; while (*string == '-') string++; return *string == '\0'; } Errorclass pi(void) { char **nwordv; nwordv = NULL; if (cur_wordc < 2) return C_UNKNOWN; if (strlen(cur_wordv[1]) == 1 && ( cur_wordv[1][0] == 'e' || cur_wordv[1][0] == 'E') && piptr(cur_wordv[2]) ) { bool longpiptr = false; /* * We have recognized a first pass error of the form: * letter ------^---- message * * turn into an error message of the form: * * file line 'pascal errortype' letter \n |---- message * or of the form: * file line letter |---- message * when there are strlen("(*[pi]") or more * preceding '-' on the error pointer. * * Where the | is intended to be a down arrow, so that * the pi error messages can be inserted above the * line in error, instead of below. (All of the other * languages put their messages before the source line, * instead of after it as does pi.) * * where the pointer to the error has been truncated * by 6 characters to account for the fact that * the pointer points into a tab preceded input line. */ language = INPI; (void)substitute(cur_wordv[2], '^', '|'); longpiptr = position(cur_wordv[2],'|') > (6+8); nwordv = wordvsplice(longpiptr ? 2 : 4, cur_wordc, cur_wordv+1); nwordv[0] = strdup(currentfilename); nwordv[1] = strdup(c_linenumber); if (!longpiptr) { nwordv[2] = Strdup("pascal errortype"); /* XXX leaked */ nwordv[3] = cur_wordv[1]; nwordv[4] = strdup("%%%\n"); if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ nwordv[5] += (8-2); /* bump over 6 characters */ } cur_wordv = nwordv - 1; /* convert to 1 based */ cur_wordc += longpiptr ? 2 : 4; return C_TRUE; } if (cur_wordc >= 4 && strlen(cur_wordv[1]) == 1 && (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e') && alldigits(cur_wordv[2]) && strlen(cur_wordv[3]) == 1 && cur_wordv[3][0] == '-' ) { /* * Message of the form: letter linenumber - message * Turn into form: filename linenumber letter - message */ language = INPI; nwordv = wordvsplice(1, cur_wordc, cur_wordv + 1); nwordv[0] = strdup(currentfilename); nwordv[1] = cur_wordv[2]; nwordv[2] = cur_wordv[1]; c_linenumber = cur_wordv[2]; cur_wordc += 1; cur_wordv = nwordv - 1; return C_TRUE; } if (cur_wordc >= 3 && strlen(cur_wordv[1]) == 1 && (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e') && strlen(cur_wordv[2]) == 1 && cur_wordv[2][0] == '-' ) { /* * Message of the form: letter - message * * This happens only when we are traversing the tree * during the second pass of pi, and discover semantic * errors. * * We have already (presumably) saved the header message * and can now construct a nulled error message for the * current file. * * Turns into a message of the form: * filename (header) letter - message * * First, see if it is a message referring to more than * one line number. Only of the form: * %s undefined on line%s * %s improperly used on line%s */ bool undefined = false; int wordindex; language = INPI; if ((undefined = wordv_eq(cur_wordv+2, 3, pi_und1)) || (undefined = wordv_eq(cur_wordv+2, 3, pi_und2)) || wordv_eq(cur_wordv+2, 4, pi_imp1) || wordv_eq(cur_wordv+2, 4, pi_imp2) ) { for (wordindex = undefined ? 5 : 6; wordindex <= cur_wordc; wordindex++) { if (nwordv != NULL) { free(nwordv[0]); free(nwordv); } nwordv = wordvsplice(2, undefined ? 2 : 3, cur_wordv+1); nwordv[0] = strdup(currentfilename); nwordv[1] = cur_wordv[wordindex]; if (wordindex != cur_wordc) erroradd(undefined ? 4 : 5, nwordv, C_TRUE, C_UNKNOWN); } cur_wordc = undefined ? 4 : 5; cur_wordv = nwordv - 1; return C_TRUE; } nwordv = wordvsplice(1+3, cur_wordc, cur_wordv+1); nwordv[0] = strdup(currentfilename); nwordv[1] = strdup(c_header[0]); nwordv[2] = strdup(c_header[1]); nwordv[3] = strdup(c_header[2]); cur_wordv = nwordv - 1; cur_wordc += 1 + 3; return C_THISFILE; } if (strcmp(cur_wordv[1], "...") == 0 && c_linenumber != NULL && currentfilename != default_currentfilename) { /* * have a continuation error message * of the form: ... message * Turn into form : filename linenumber message */ language = INPI; nwordv = wordvsplice(1, cur_wordc, cur_wordv+1); nwordv[0] = strdup(currentfilename); nwordv[1] = strdup(c_linenumber); cur_wordv = nwordv - 1; cur_wordc += 1; return C_TRUE; } if (cur_wordc == 6 && lastchar(cur_wordv[6]) == ':' && isdateformat(5, cur_wordv + 1) ) { /* * Have message that tells us we have changed files */ language = INPI; currentfilename = strdup(cur_wordv[6]); clob_last(currentfilename, '\0'); return C_SYNC; } if (cur_wordc == 3 && strcmp(cur_wordv[1], "In") == 0 && lastchar(cur_wordv[3]) == ':' && instringset(cur_wordv[2], Piroutines) ) { language = INPI; c_header = wordvsplice(0, cur_wordc, cur_wordv+1); return C_SYNC; } /* * now, check for just the line number followed by the text */ if (alldigits(cur_wordv[1])) { language = INPI; c_linenumber = cur_wordv[1]; return C_IGNORE; } /* * Attempt to match messages referring to a line number * * Multiply defined label in case, lines %d and %d * Goto %s from line %d is into a structured statement * End matched %s on line %d * Inserted keyword end matching %s on line %d */ structured = false; multiple = false; if ( (cur_wordc == 6 && wordv_eq(cur_wordv+1, 2, pi_Endmatched)) || (cur_wordc == 8 && wordv_eq(cur_wordv+1, 4, pi_Inserted)) || (multiple = (cur_wordc == 9 && wordv_eq(cur_wordv+1,6, pi_multiple))) || (structured = (cur_wordc == 10 && wordv_eq(cur_wordv+6,5, pi_structured))) ) { language = INPI; nwordv = wordvsplice(2, cur_wordc, cur_wordv+1); nwordv[0] = strdup(currentfilename); nwordv[1] = structured ? cur_wordv [5] : cur_wordv[cur_wordc]; cur_wordc += 2; cur_wordv = nwordv - 1; if (!multiple) return C_TRUE; erroradd(cur_wordc, nwordv, C_TRUE, C_UNKNOWN); nwordv = wordvsplice(0, cur_wordc, nwordv); nwordv[1] = cur_wordv[cur_wordc - 2]; return C_TRUE; } return C_UNKNOWN; }
