/*	$NetBSD: subr.c,v 1.20 2022/04/07 19:33:38 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[] = "@(#)subr.c	8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: subr.c,v 1.20 2022/04/07 19:33:38 andvar Exp $");
#endif /* not lint */

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

/*
 * Arrayify a list of rules
 */
void
arrayify(int *e_length, Eptr **e_array, Eptr header)
{
	Eptr errorp;
	Eptr *array;
	int listlength;
	int listindex;

	for (errorp = header, listlength = 0;
	     errorp; errorp = errorp->error_next, listlength++)
		continue;
	array = Calloc(listlength+1, sizeof (Eptr));
	for (listindex = 0, errorp = header;
	    listindex < listlength;
	    listindex++, errorp = errorp->error_next) {
		array[listindex] = errorp;
		errorp->error_position = listindex;
	}
	array[listindex] = NULL;
	*e_length = listlength;
	*e_array = array;
}

void *
Calloc(size_t nelements, size_t size)
{
	void *back;

	back = calloc(nelements, size);
	if (back == NULL)
		errx(1, "Ran out of memory.");
	return (back);
}

char *
Strdup(const char *s)
{
	char *ret;

	ret = strdup(s);
	if (ret == NULL) {
		errx(1, "Ran out of memory.");
	}
	return ret;
}

/*
 * find the position of a given character in a string
 * (one based)
 */
int
position(const char *string, char ch)
{
	int i;

	if (string)
		for (i=1; *string; string++, i++) {
			if (*string == ch)
				return (i);
		}
	return (-1);
}

/*
 * clobber the first occurrence of ch in string by the new character
 */
char *
substitute(char *string, char chold, char chnew)
{
	char *cp = string;

	if (cp)
		while (*cp) {
			if (*cp == chold) {
				*cp = chnew;
				break;
			}
			cp++;
		}
	return (string);
}

char
lastchar(const char *string)
{
	int length;

	if (string == NULL)
		return ('\0');
	length = strlen(string);
	if (length >= 1)
		return (string[length-1]);
	else
		return ('\0');
}

char
firstchar(const char *string)
{
	if (string)
		return (string[0]);
	else
		return ('\0');
}

char
next_lastchar(const char *string)
{
	int length;

	if (string == NULL)
		return ('\0');
	length = strlen(string);
	if (length >= 2)
		return (string[length - 2]);
	else
		return ('\0');
}

void
clob_last(char *string, char newstuff)
{
	int length = 0;

	if (string)
		length = strlen(string);
	if (length >= 1)
		string[length - 1] = newstuff;
}

/*
 * parse a string that is the result of a format %s(%d)
 * return TRUE if this is of the proper format
 */
bool
persperdexplode(char *string, char **r_perd, char **r_pers)
{
	char *cp;
	int length = 0;

	if (string)
		length = strlen(string);
	if (length >= 4 && string[length - 1] == ')') {
		for (cp = &string[length - 2];
		     isdigit((unsigned char)*cp) && *cp != '(';
		     --cp)
			continue;
		if (*cp == '(') {
			string[length - 1] = '\0';	/* clobber the ) */
			*r_perd = strdup(cp+1);
			string[length - 1] = ')';
			*cp = '\0';			/* clobber the ( */
			*r_pers = strdup(string);
			*cp = '(';
			return true;
		}
	}
	return false;
}

#if 0 /* unused */
/*
 * parse a quoted string that is the result of a format \"%s\"(%d)
 * return TRUE if this is of the proper format
 */
static boolean
qpersperdexplode(char *string, char **r_perd, char **r_pers)
{
	char *cp;
	int length = 0;

	if (string)
		length = strlen(string);
	if (length >= 4 && string[length - 1] == ')') {
		for (cp = &string[length - 2];
		     isdigit((unsigned char)*cp) && *cp != '(';
		     --cp)
			continue;
		if (*cp == '(' && *(cp - 1) == '"') {
			string[length - 1] = '\0';
			*r_perd = strdup(cp+1);
			string[length - 1] = ')';
			*(cp - 1) = '\0';		/* clobber the " */
			*r_pers = strdup(string + 1);
			*(cp - 1) = '"';
			return true;
		}
	}
	return false;
}
#endif /* 0 - unused */

static char cincomment[] = CINCOMMENT;
static char coutcomment[] = COUTCOMMENT;
static char fincomment[] = FINCOMMENT;
static char foutcomment[] = FOUTCOMMENT;
static char newline[] = NEWLINE;
static char piincomment[] = PIINCOMMENT;
static char pioutcomment[] = PIOUTCOMMENT;
static char lispincomment[] = LISPINCOMMENT;
static char riincomment[] = RIINCOMMENT;
static char rioutcomment[] = RIOUTCOMMENT;
static char troffincomment[] = TROFFINCOMMENT;
static char troffoutcomment[] = TROFFOUTCOMMENT;
static char mod2incomment[] = MOD2INCOMMENT;
static char mod2outcomment[] = MOD2OUTCOMMENT;

struct lang_desc lang_table[] = {
	{ /*INUNKNOWN	0*/	"unknown", cincomment,     coutcomment },
	{ /*INCPP	1*/	"cpp",     cincomment,     coutcomment },
	{ /*INCC	2*/	"cc",      cincomment,     coutcomment },
	{ /*INAS	3*/	"as",      ASINCOMMENT,    newline },
	{ /*INLD	4*/	"ld",      cincomment,     coutcomment },
	{ /*INLINT	5*/	"lint",    cincomment,     coutcomment },
	{ /*INF77	6*/	"f77",     fincomment,     foutcomment },
	{ /*INPI	7*/	"pi",      piincomment,    pioutcomment },
	{ /*INPC	8*/	"pc",      piincomment,    pioutcomment },
	{ /*INFRANZ	9*/	"franz",   lispincomment,  newline },
	{ /*INLISP	10*/	"lisp",    lispincomment,  newline },
	{ /*INVAXIMA	11*/	"vaxima",  lispincomment,  newline },
	{ /*INRATFOR	12*/	"ratfor",  fincomment,     foutcomment },
	{ /*INLEX	13*/	"lex",     cincomment,     coutcomment },
	{ /*INYACC	14*/	"yacc",    cincomment,     coutcomment },
	{ /*INAPL	15*/	"apl",     ".lm",          newline },
	{ /*INMAKE	16*/	"make",    ASINCOMMENT,    newline },
	{ /*INRI	17*/	"ri",      riincomment,    rioutcomment },
	{ /*INTROFF	18*/	"troff",   troffincomment, troffoutcomment },
	{ /*INMOD2	19*/	"mod2",    mod2incomment,  mod2outcomment },
	{			0,         0,              0 }
};

void
printerrors(bool look_at_subclass, int errorc, Eptr errorv[])
{
	int i;
	Eptr errorp;

	for (errorp = errorv[i = 0]; i < errorc; errorp = errorv[++i]) {
		if (errorp->error_e_class == C_IGNORE)
			continue;
		if (look_at_subclass && errorp->error_s_class == C_DUPL)
			continue;
		printf("Error %d, (%s error) [%s], text = \"",
			i,
			class_table[errorp->error_e_class],
			lang_table[errorp->error_language].lang_name);
		wordvprint(stdout,errorp->error_lgtext,errorp->error_text);
		printf("\"\n");
	}
}

void
wordvprint(FILE *fyle, int wordc, char **wordv)
{
	int i;
	const char *sep = "";

	for (i = 0; i < wordc; i++)
		if (wordv[i]) {
			fprintf(fyle, "%s%s",sep,wordv[i]);
			sep = " ";
		}
}

/*
 * Given a string, parse it into a number of words, and build
 * a wordc wordv combination pointing into it.
 */
void
wordvbuild(char *string, int *r_wordc, char ***r_wordv)
{
	char *cp;
	char **wordv;
	int wordcount;
	int wordindex;

	for (wordcount = 0, cp = string; *cp; wordcount++) {
		while (*cp && isspace((unsigned char)*cp))
			cp++;
		if (*cp == '\0')
			break;
		while (*cp && !isspace((unsigned char)*cp))
			cp++;
	}
	wordv = Calloc(wordcount + 1, sizeof (char *));
	for (cp=string, wordindex=0; wordcount; wordindex++, --wordcount) {
		while (*cp && isspace((unsigned char)*cp))
			cp++;
		if (*cp == '\0')
			break;
		wordv[wordindex] = cp;
		while (*cp && !isspace((unsigned char)*cp))
			cp++;
		*cp++ = '\0';
	}
	if (wordcount != 0)
		errx(6, "Initial miscount of the number of words in a line");
	wordv[wordindex] = NULL;
#ifdef FULLDEBUG
	for (wordcount = 0; wordcount < wordindex; wordcount++)
		printf("Word %d = \"%s\"\n", wordcount, wordv[wordcount]);
	printf("\n");
#endif
	*r_wordc = wordindex;
	*r_wordv = wordv;
}

/*
 * Compare two 0 based wordvectors
 */
int
wordvcmp(char **wordv1, int wordc, char **wordv2)
{
	int i;
	int back;

	for (i = 0; i < wordc; i++) {
		if (wordv1[i] == NULL || wordv2[i] == NULL)
			return (-1);
		if ((back = strcmp(wordv1[i], wordv2[i])) != 0)
			return (back);
	}
	return (0);	/* they are equal */
}

/*
 * splice a 0 basedword vector onto the tail of a
 * new wordv, allowing the first emptyhead slots to be empty
 */
char **
wordvsplice(int emptyhead, int wordc, char **wordv)
{
	char **nwordv;
	int nwordc = emptyhead + wordc;
	int i;

	nwordv = Calloc(nwordc, sizeof (char *));
	for (i = 0; i < emptyhead; i++)
		nwordv[i] = NULL;
	for (i = emptyhead; i < nwordc; i++) {
		nwordv[i] = wordv[i-emptyhead];
	}
	return (nwordv);
}

/*
 * plural and verb forms
 */
static const char *S = "s";
static const char *N = "";

const char *
plural(int n)
{
	return (n > 1 ? S : N);
}

const char *
verbform(int n)
{
	return (n > 1 ? N : S);
}