/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "error.h"

int	wordc;		/* how long the current error message is */
char	**wordv;	/* the actual error message */

Errorclass	onelong(void);
Errorclass	cpp(void);
Errorclass	pccccom(void);	/* Portable C Compiler C Compiler */
Errorclass	richieccom(void);	/* Richie Compiler for 11 */
Errorclass	lint0(void);
Errorclass	lint1(void);
Errorclass	lint2(void);
Errorclass	lint3(void);
Errorclass	make(void);
Errorclass	f77(void);
Errorclass	pi(void);
Errorclass	ri(void);
Errorclass	troff(void);
Errorclass	mod2(void);
Errorclass	sunf77(void);

static Errorclass catchall(void);

/*
 *	Eat all of the lines in the input file, attempting to categorize
 *	them by their various flavors
 */
static	char	inbuffer[BUFSIZ];

void
eaterrors(int *r_errorc, Eptr **r_errorv)
{
	Errorclass	errorclass = C_SYNC;

	for (;;) {
		if (fgets(inbuffer, BUFSIZ, errorfile) == NULL)
			break;
		wordvbuild(inbuffer, &wordc, &wordv);
		/*
		 * for convenience, convert wordv to be 1 based, instead
		 * of 0 based.
		 */
		wordv -= 1;
		/*
		 * check for sunf77 errors has to be done before
		 * pccccom to be able to distingush between the two
		 */
		if ((wordc > 0) &&
		    (((errorclass = onelong()) != C_UNKNOWN) ||
		    ((errorclass = cpp()) != C_UNKNOWN) ||
		    ((errorclass = sunf77()) != C_UNKNOWN) ||
		    ((errorclass = pccccom()) != C_UNKNOWN) ||
		    ((errorclass = richieccom()) != C_UNKNOWN) ||
		    ((errorclass = lint0()) != C_UNKNOWN) ||
		    ((errorclass = lint1()) != C_UNKNOWN) ||
		    ((errorclass = lint2()) != C_UNKNOWN) ||
		    ((errorclass = lint3()) != C_UNKNOWN) ||
		    ((errorclass = make()) != C_UNKNOWN) ||
		    ((errorclass = f77()) != C_UNKNOWN) ||
		    ((errorclass = pi()) != C_UNKNOWN) ||
		    ((errorclass = ri()) != C_UNKNOWN) ||
		    ((errorclass = troff()) != C_UNKNOWN) ||
		    ((errorclass = mod2()) != C_UNKNOWN) ||
		    ((errorclass = troff()) != C_UNKNOWN))) {
		    /* EMPTY */
		} else {
			errorclass = catchall();
		}
		if (wordc)
			erroradd(wordc, wordv+1, errorclass, C_UNKNOWN);
	}
#ifdef FULLDEBUG
	printf("%d errorentrys\n", nerrors);
#endif
	arrayify(r_errorc, r_errorv, er_head);
}

/*
 *	create a new error entry, given a zero based array and count
 */
void
erroradd(int errorlength, char **errorv, Errorclass errorclass,
    Errorclass errorsubclass)
{
	Eptr	newerror;
	char	*cp;

	if (errorclass == C_TRUE) {
		/* check canonicalization of the second argument */
		for (cp = errorv[1]; *cp && isdigit(*cp); cp++)
			continue;
		errorclass = (*cp == '\0') ? C_TRUE : C_NONSPEC;
#ifdef FULLDEBUG
		if (errorclass != C_TRUE)
			printf("The 2nd word, \"%s\" is not a number.\n",
			    errorv[1]);
#endif
	}
	if (errorlength > 0) {
		newerror = Calloc(1, sizeof (Edesc));
		newerror->error_language = language; /* language is global */
		newerror->error_text = errorv;
		newerror->error_lgtext = errorlength;
		if (errorclass == C_TRUE)
			newerror->error_line = atoi(errorv[1]);
		newerror->error_e_class = errorclass;
		newerror->error_s_class = errorsubclass;
		switch (newerror->error_e_class = discardit(newerror)) {
			case C_SYNC:		nsyncerrors++; break;
			case C_DISCARD:		ndiscard++; break;
			case C_NULLED:		nnulled++; break;
			case C_NONSPEC:		nnonspec++; break;
			case C_THISFILE:	nthisfile++; break;
			case C_TRUE:		ntrue++; break;
			case C_UNKNOWN:		nunknown++; break;
			case C_IGNORE:		nignore++; break;
		}
		newerror->error_next = er_head;
		er_head = newerror;
		newerror->error_no = nerrors++;
	}	/* length > 0 */
}

Errorclass
onelong(void)
{
	char	**nwordv;
	if ((wordc == 1) && (language != INLD)) {
		/*
		 *	We have either:
		 *	a)	file name from cc
		 *	b)	Assembler telling world that it is complaining
		 *	c)	Noise from make ("Stop.")
		 *	c)	Random noise
		 */
		wordc = 0;
		if (wordv[1] != NULL && strcmp(wordv[1], "Stop.") == 0) {
			language = INMAKE;
			return (C_SYNC);
		}
		if (wordv[1] != NULL) {
			if (strcmp(wordv[1], "Assembler:") == 0) {
				/*
				 * assembler always alerts us to
				 * what happened
				 */
				language = INAS;
				return (C_SYNC);
			} else if (strcmp(wordv[1], "Undefined:") == 0) {
				/* loader complains about unknown symbols */
				language = INLD;
				return (C_SYNC);
			}
		}
		if (lastchar(wordv[1]) == ':') {
			/* cc tells us what file we are in */
			/* Sunf77 tells us what subroutine we are in */
			currentfilename = wordv[1];
			(void) substitute(currentfilename, ':', '\0');
			language = INCC;
			return (C_SYNC);
		}
	} else if ((wordc == 1) && (language == INLD)) {
		nwordv = Calloc(4, sizeof (char *));
		nwordv[0] = "ld:";
		nwordv[1] = wordv[1];
		nwordv[2] = "is";
		nwordv[3] = "undefined.";
		wordc = 4;
		wordv = nwordv - 1;
		return (C_NONSPEC);
	} else if (wordc == 1) {
		/*
		 * any other single word messages are
		 * considered synchronizing
		 */
		return (C_SYNC);
	} else
	/* Sunf77 may derive 2-word synchronizing messages ending with a `:' */
	if ((wordc == 2) && (lastchar(wordv[2]) == ':')) {
		wordc = 0;
		language = INSUNF77;
		return (C_SYNC);
	}
	return (C_UNKNOWN);
}	/* end of one long */

Errorclass
cpp(void)
{
	/*
	 *	Now attempt a cpp error message match
	 *	Examples:
	 *		./morse.h: 23: undefined control
	 *		morsesend.c: 229: MAGNIBBL: argument mismatch
	 *		morsesend.c: 237: MAGNIBBL: argument mismatch
	 *		test1.c: 6: undefined control
	 */
	if ((language != INLD) &&	/* loader errors have almost same fmt */
	    (lastchar(wordv[1]) == ':') &&
	    (isdigit(firstchar(wordv[2]))) &&
	    (lastchar(wordv[2]) == ':')) {
		language = INCPP;
		clob_last(wordv[1], '\0');
		clob_last(wordv[2], '\0');
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}	/*end of cpp*/

Errorclass
pccccom(void)
{
	/*
	 *	Now attempt a ccom error message match:
	 *	Examples:
	 *	  "morsesend.c", line 237: operands of & have incompatible types
	 *	  "test.c", line 7: warning: old-fashioned initialization: use =
	 *	  "subdir.d/foo2.h", line 1: illegal initialization
	 */
	if ((firstchar(wordv[1]) == '"') &&
	    (lastchar(wordv[1]) == ',') &&
	    (next_lastchar(wordv[1]) == '"') &&
	    (strcmp(wordv[2], "line") == 0) &&
	    (isdigit(firstchar(wordv[3]))) &&
	    (lastchar(wordv[3]) == ':')) {
		clob_last(wordv[1], '\0');	/* drop last , */
		clob_last(wordv[1], '\0');	/* drop last " */
		wordv[1]++;			/* drop first " */
		clob_last(wordv[3], '\0');	/* drop : on line number */
		wordv[2] = wordv[1];	/* overwrite "line" */
		wordv++;		/* compensate */
		wordc--;
		currentfilename = wordv[1];
		language = INCC;
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}	/* end of ccom */

/*
 *	Do the error message from the Richie C Compiler for the PDP11,
 *	which has this source:
 *
 *	if (filename[0])
 *		fprintf(stderr, "%s:", filename);
 *	fprintf(stderr, "%d: ", line);
 *
 */
Errorclass
richieccom(void)
{
	char	*cp;
	char	**nwordv;
	char	*file;

	if (lastchar(wordv[1]) == ':') {
		cp = wordv[1] + strlen(wordv[1]) - 1;
		while (isdigit(*--cp))
			continue;
		if (*cp == ':') {
			clob_last(wordv[1], '\0');	/* last : */
			*cp = '\0';			/* first : */
			file = wordv[1];
			nwordv = wordvsplice(1, wordc, wordv+1);
			nwordv[0] = file;
			nwordv[1] = cp + 1;
			wordc += 1;
			wordv = nwordv - 1;
			language = INCC;
			currentfilename = wordv[1];
			return (C_TRUE);
		}
	}
	return (C_UNKNOWN);
}

Errorclass
lint0(void)
{
	char	**nwordv;
	char	*line, *file;
	/*
	 *	Attempt a match for the new lint style normal compiler
	 *	error messages, of the form
	 *
	 *	printf("%s(%d): %s\n", filename, linenumber, message);
	 */
	if (wordc >= 2) {
		if ((lastchar(wordv[1]) == ':') &&
		    (next_lastchar(wordv[1]) == ')')) {
			clob_last(wordv[1], '\0'); /* colon */
			if (persperdexplode(wordv[1], &line, &file)) {
				nwordv = wordvsplice(1, wordc, wordv+1);
				nwordv[0] = file;	/* file name */
				nwordv[1] = line;	/* line number */
				wordc += 1;
				wordv = nwordv - 1;
				language = INLINT;
				return (C_TRUE);
			}
			wordv[1][strlen(wordv[1])] = ':';
		}
	}
	return (C_UNKNOWN);
}

Errorclass
lint1(void)
{
	char	*line1, *line2;
	char	*file1, *file2;
	char	**nwordv1, **nwordv2;

	/*
	 *	Now, attempt a match for the various errors that lint
	 *	can complain about.
	 *
	 *	Look first for type 1 lint errors
	 */
	if (wordc > 1 && strcmp(wordv[wordc-1], "::") == 0) {
	/*
	 * %.7s, arg. %d used inconsistently %s(%d) :: %s(%d)
	 * %.7s value used inconsistently %s(%d) :: %s(%d)
	 * %.7s multiply declared %s(%d) :: %s(%d)
	 * %.7s value declared inconsistently %s(%d) :: %s(%d)
	 * %.7s function value type must be declared before use %s(%d) :: %s(%d)
	 */
		language = INLINT;
		if ((wordc > 2) &&
		    (persperdexplode(wordv[wordc], &line2, &file2)) &&
		    (persperdexplode(wordv[wordc-2], &line1, &file1))) {
			nwordv1 = wordvsplice(2, wordc, wordv+1);
			nwordv2 = wordvsplice(2, wordc, wordv+1);
			nwordv1[0] = file1; nwordv1[1] = line1;
			/* takes 0 based */
			erroradd(wordc+2, nwordv1, C_TRUE, C_DUPL);
			nwordv2[0] = file2; nwordv2[1] = line2;
			wordc = wordc + 2;
			wordv = nwordv2 - 1;	/* 1 based */
			return (C_TRUE);
		}
	}
	return (C_UNKNOWN);
} /* end of lint 1*/

Errorclass
lint2(void)
{
	char	*file;
	char	*line;
	char	**nwordv;
	/*
	 *	Look for type 2 lint errors
	 *
	 *	%.7s used( %s(%d) ), but not defined
	 *	%.7s defined( %s(%d) ), but never used
	 *	%.7s declared( %s(%d) ), but never used or defined
	 *
	 *	bufp defined( "./metric.h"(10) ), but never used
	 */
	if ((lastchar(wordv[2]) == '(' /* ')' */) &&
	    (strcmp(wordv[4], "),") == 0)) {
		language = INLINT;
		if (persperdexplode(wordv[3], &line, &file)) {
			nwordv = wordvsplice(2, wordc, wordv+1);
			nwordv[0] = file; nwordv[1] = line;
			wordc = wordc + 2;
			wordv = nwordv - 1;	/* 1 based */
			return (C_TRUE);
		}
	}
	return (C_UNKNOWN);
} /* end of lint 2*/

char	*Lint31[4] = {"returns", "value", "which", "is"};
char	*Lint32[6] = {"value", "is", "used,", "but", "none", "returned"};

Errorclass
lint3(void)
{
	if ((wordvcmp(wordv+2, 4, Lint31) == 0) ||
	    (wordvcmp(wordv+2, 6, Lint32) == 0)) {
		language = INLINT;
		return (C_NONSPEC);
	}
	return (C_UNKNOWN);
}

/*
 *	Special word vectors for use by F77 recognition
 */
char	*F77_fatal[3] = {"Compiler", "error", "line"};
char	*F77_error[3] = {"Error", "on", "line"};
char	*F77_warning[3] = {"Warning", "on", "line"};
char    *F77_no_ass[3] = {"Error.", "No", "assembly."};

Errorclass
f77(void)
{
	char	**nwordv;
	/*
	 *	look for f77 errors:
	 *	Error messages from /usr/src/cmd/f77/error.c, with
	 *	these printf formats:
	 *
	 *		Compiler error line %d of %s: %s
	 *		Error on line %d of %s: %s
	 *		Warning on line %d of %s: %s
	 *		Error.  No assembly.
	 */
	if (wordc == 3 && wordvcmp(wordv+1, 3, F77_no_ass) == 0) {
		wordc = 0;
		return (C_SYNC);
	}
	if (wordc < 6)
		return (C_UNKNOWN);
	if ((lastchar(wordv[6]) == ':') &&
	    ((wordvcmp(wordv+1, 3, F77_fatal) == 0) ||
	    (wordvcmp(wordv+1, 3, F77_error) == 0) ||
	    (wordvcmp(wordv+1, 3, F77_warning) == 0))) {
		language = INF77;
		nwordv = wordvsplice(2, wordc, wordv+1);
		nwordv[0] = wordv[6];
		clob_last(nwordv[0], '\0');
		nwordv[1] = wordv[4];
		wordc += 2;
		wordv = nwordv - 1;	/* 1 based */
		return (C_TRUE);
	}
	return (C_UNKNOWN);
} /* end of f77 */

char	*Make_Croak[3] = {"***", "Error", "code"};
char	*Make_NotRemade[5] = {"not", "remade", "because", "of", "errors"};

Errorclass
make(void)
{
	if (wordvcmp(wordv+1, 3, Make_Croak) == 0) {
		language = INMAKE;
		return (C_SYNC);
	}
	if (wordvcmp(wordv+2, 5, Make_NotRemade) == 0) {
		language = INMAKE;
		return (C_SYNC);
	}
	return (C_UNKNOWN);
}

Errorclass
ri(void)
{
/*
 *	Match an error message produced by ri; here is the
 *	procedure yanked from the distributed version of ri
 *	April 24, 1980.
 *
 *	serror(str, x1, x2, x3)
 *		char str[];
 *		char *x1, *x2, *x3;
 *	{
 *		extern int yylineno;
 *
 *		putc('"', stdout);
 *		fputs(srcfile, stdout);
 *		putc('"', stdout);
 *		fprintf(stdout, " %d: ", yylineno);
 *		fprintf(stdout, str, x1, x2, x3);
 *		fprintf(stdout, "\n");
 *		synerrs++;
 *	}
 */
	if ((firstchar(wordv[1]) == '"') &&
	    (lastchar(wordv[1]) == '"') &&
	    (lastchar(wordv[2]) == ':') &&
	    (isdigit(firstchar(wordv[2])))) {
		clob_last(wordv[1], '\0');	/* drop the last " */
		wordv[1]++;	/* skip over the first " */
		clob_last(wordv[2], '\0');
		language = INRI;
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}

static Errorclass
catchall(void)
{
	/*
	 *	Catches random things.
	 */
	language = INUNKNOWN;
	return (C_NONSPEC);
}

Errorclass
troff(void)
{
	/*
	 *	troff source error message, from eqn, bib, tbl...
	 *	Just like pcc ccom, except uses `'
	 */
	if ((firstchar(wordv[1]) == '`') &&
	    (lastchar(wordv[1]) == ',') &&
	    (next_lastchar(wordv[1]) == '\'') &&
	    (strcmp(wordv[2], "line") == 0) &&
	    (isdigit(firstchar(wordv[3]))) &&
	    (lastchar(wordv[3]) == ':')) {
		clob_last(wordv[1], '\0');	/* drop last , */
		clob_last(wordv[1], '\0');	/* drop last " */
		wordv[1]++;			/* drop first " */
		clob_last(wordv[3], '\0');	/* drop : on line number */
		wordv[2] = wordv[1];	/* overwrite "line" */
		wordv++;		/* compensate */
		currentfilename = wordv[1];
		language = INTROFF;
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}

Errorclass
mod2(void)
{
	/*
	 *	for decwrl modula2 compiler (powell)
	 */
	if (((strcmp(wordv[1], "!!!") == 0) ||		/* early version */
	    (strcmp(wordv[1], "File") == 0)) &&		/* later version */
	    (lastchar(wordv[2]) == ',') &&		/* file name */
	    (strcmp(wordv[3], "line") == 0) &&
	    (isdigit(firstchar(wordv[4]))) &&	/* line number */
	    (lastchar(wordv[4]) == ':')) {	/* line number */
		clob_last(wordv[2], '\0');	/* drop last , on file name */
		clob_last(wordv[4], '\0');	/* drop last : on line number */
		wordv[3] = wordv[2];		/* file name on top of "line" */
		wordv += 2;
		wordc -= 2;
		currentfilename = wordv[1];
		language = INMOD2;
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}

Errorclass
sunf77(void)
{
	/*
	 * Finally attempt a Sun f77 error message match:
	 * Examples:
	 *	"bar.f", line 237: Error: no label on format statement
	 *	"test.f", line 7: ANSI extension: Hollerith constant
	 *	"dir/foo.h", line 1: Warning: missing END statement
	 */
	if ((firstchar(wordv[1]) == '"') &&
	    (lastchar(wordv[1]) == ',') &&
	    (next_lastchar(wordv[1]) == '"') &&
	    (strcmp(wordv[2], "line") == 0) &&
	    (isdigit(firstchar(wordv[3]))) &&
	    (lastchar(wordv[3]) == ':') &&
	    ((strcmp(wordv[4], "Error:") == 0) ||
	    (strcmp(wordv[4], "Warning:") == 0) ||
	    ((strcmp(wordv[4], "ANSI") == 0) &&
	    (strcmp(wordv[5], "extension:") == 0)))) {
		clob_last(wordv[1], '\0');	/* drop last , */
		clob_last(wordv[1], '\0');	/* drop last " */
		wordv[1]++;			/* drop first " */
		clob_last(wordv[3], '\0');	/* drop : on line number */
		wordv[2] = wordv[1];	/* overwrite "line" */
		wordv++;		/* compensate */
		wordc--;
		currentfilename = wordv[1];
		language = INSUNF77;
		return (C_TRUE);
	}
	return (C_UNKNOWN);
}	/* end of Sun f77 */