/*
 * 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 1990 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "string.h"
#include "errno.h"
#include "stdlib.h"
#include "regexpr.h"

#include "lp.h"
#include "filters.h"

static char             *keyword_list[] = {
        PARM_INPUT,
        PARM_OUTPUT,
        PARM_TERM,
        PARM_PRINTER,
        PARM_CPI,
        PARM_LPI,
        PARM_LENGTH,
        PARM_WIDTH,
        PARM_PAGES,
        PARM_CHARSET,
        PARM_FORM,
        PARM_COPIES,
        PARM_MODES,
        0
};

#if     defined(__STDC__)
static char *           q_strchr ( char * , char );
static char *           q_strdup ( char * );
#else
static char             *q_strchr(),
                        *q_strdup();
#endif

/**
 ** s_to_filtertype() - CONVERT (char *) TO (FILTERTYPE)
 **/

FILTERTYPE
#if     defined(__STDC__)
s_to_filtertype (
        char *                  str
)
#else
s_to_filtertype (str)
        char                    *str;
#endif
{
        /*
         * The default type, if none is given, is ``slow''.
         */
        if (STREQU(str, FL_FAST))
                return (fl_fast);
        else
                return (fl_slow);
}

/**
 ** s_to_type() - CONVERT (char *) TO (TYPE)
 **/

TYPE
#if     defined(__STDC__)
s_to_type (
        char *                  str
)
#else
s_to_type (str)
        register char           *str;
#endif
{
        TYPE                    ret;

        if ((ret.name = Strdup(str)))
                ret.info = isterminfo(str);
        return (ret);
}

/**
 ** s_to_template() - CONVERT (char *) TO (TEMPLATE)
 **/

TEMPLATE
#if     defined(__STDC__)
s_to_template (
        char *                  str
)
#else
s_to_template (str)
        register char           *str;
#endif
{
        TEMPLATE                ret;

        register char           *p,
                                c;


        if (!*(str += strspn(str, " "))) {
                lp_errno = LP_ETEMPLATE;
                ret.keyword = 0;
                goto Done;
        }

        if (!(p = strchr(str, ' '))) {
                lp_errno = LP_EPATTERN;
                ret.keyword = 0;
                goto Done;
        }

        c = *p;
        *p = 0;
        ret.keyword = Strdup(str);
        *p = c;

        if (!ret.keyword) {
                lp_errno = LP_ENOMEM;
                goto Done;
        }
        if (!searchlist(ret.keyword, keyword_list)) {
                lp_errno = LP_EKEYWORD;
                ret.keyword = 0;
                goto Done;
        }

        str = p + strspn(p, " ");
        if (!(p = q_strchr(str, '='))) {
                lp_errno = LP_ERESULT;
                ret.keyword = 0;
                goto Done;
        }
        while (p[-1] == ' ' && p > str)
                p--;

        c = *p;
        *p = 0;
        ret.pattern = q_strdup(str);
        *p = c;

        if (!ret.pattern) {
                lp_errno = LP_ENOMEM;
                ret.keyword = 0;
                goto Done;
        }

        if (!*ret.pattern) {
                lp_errno = LP_EPATTERN;
                ret.keyword = 0;
                goto Done;
        }

        if (!(ret.re = compile(ret.pattern, (char *)0, (char *)0))) {
                lp_errno = LP_EREGEX;
                ret.keyword = 0;
                goto Done;
        }
        ret.nbra = nbra;

        if (!*(str = p + strspn(p, " ="))) {
                lp_errno = LP_ERESULT;
                ret.keyword = 0;
                goto Done;
        }
        ret.result = q_strdup(str);
        if (!ret.result) {
                lp_errno = LP_ENOMEM;
                ret.keyword = 0;
        }

Done:   return (ret);
}

/**
 ** sl_to_typel() - CONVERT (char **) LIST TO (TYPE *) LIST
 **/

TYPE *
#if     defined(__STDC__)
sl_to_typel (
        char **                 src
)
#else
sl_to_typel (src)
        char                    **src;
#endif
{
        register TYPE           *dst;

        register int            nitems,
                                n;

        if (!src || !*src)
                return (0);

        for (nitems = 0; src[nitems]; nitems++)
                ;

        if (!(dst = (TYPE *)Malloc((nitems + 1) * sizeof(TYPE)))) {
                errno = ENOMEM;
                return (0);
        }

        for (n = 0; n < nitems; n++)
                dst[n] = s_to_type(src[n]);
        dst[nitems].name = 0;

        return (dst);
}

/**
 ** sl_to_templatel() - DUPLICATE A (char **) LIST AS (TEMPLATE *) LIST
 **/

TEMPLATE *
#if     defined(__STDC__)
sl_to_templatel (
        char **                 src
)
#else
sl_to_templatel (src)
        register char           **src;
#endif
{
        register TEMPLATE       *dst;

        register int            nitems,
                                n;

        if (!src || !*src)
                return (0);

        for (nitems = 0; src[nitems]; nitems++)
                ;

        if (!(dst = (TEMPLATE *)Malloc((nitems + 1) * sizeof(TEMPLATE)))){
                errno = ENOMEM;
                return (0);
        }

        for (n = 0; n < nitems; n++) {
                dst[n] = s_to_template(src[n]);
                if (dst[n].keyword == 0) {
                        freetempl (dst);
                        return (0);
                }
        }
        dst[nitems].keyword = 0;

        return (dst);
}

/**
 ** type_to_s() - CONVERT (TYPE) TO (char *)
 **/

char *
#if     defined(__STDC__)
type_to_s (
        TYPE                    t
)
#else
type_to_s (t)
        TYPE                    t;
#endif
{
        return (Strdup(t.name));
}

/**
 ** template_to_s() - CONVERT (TEMPLATE) TO (char *)
 **/

char *
#if     defined(__STDC__)
template_to_s (
        TEMPLATE                t
)
#else
template_to_s (t)
        TEMPLATE                t;
#endif
{
        register char           *ret,
                                *p,
                                *r;

        register size_t         len;


        len  = strlen(t.keyword) + 1;
        for (p = t.pattern; *p; p++) {
                if (*p == '=')
                        len++;
                len++;
        }
        len += 3 + strlen(t.result);

        ret = Malloc(len + 1);
        if (!ret) {
                errno = ENOMEM;
                return (0);
        }

        r = ret;
        for (p = t.keyword; *p; )
                *r++ = *p++;
        *r++ = ' ';
        for (p = t.pattern; *p; ) {
                if (*p == '=')
                        *r++ = '\\';
                *r++ = *p++;
        }
        *r++ = ' ';
        *r++ = '=';
        *r++ = ' ';
        for (p = t.result; *p; )
                *r++ = *p++;
        *r = 0;

        return (ret);
}

/**
 ** typel_to_sl() - DUPLICATE (TYPE *) LIST AS (char **) LIST
 **/

char **
#if     defined(__STDC__)
typel_to_sl (
        TYPE *                  src
)
#else
typel_to_sl (src)
        TYPE                    *src;
#endif
{
        register char           **dst;

        register size_t         nitems;

        register int            n;


        if (!src || !src->name)
                return (0);

        for (nitems = 0; src[nitems].name; nitems++)
                ;

        if (!(dst = (char **)Malloc((nitems + 1) * sizeof(char *)))) {
                errno = ENOMEM;
                return (0);
        }

        for (n = 0; n < nitems; n++)
                dst[n] = type_to_s(src[n]);
        dst[nitems] = 0;

        return (dst);
}

/**
 ** templatel_to_sl() - DUPLICATE A (TEMPLATE *) LIST AS (char **) LIST
 **/

char **
#if     defined(__STDC__)
templatel_to_sl (
        TEMPLATE *              src
)
#else
templatel_to_sl (src)
        register TEMPLATE       *src;
#endif
{
        register char           **dst;

        register size_t         nitems;

        register int            n;


        if (!src || !src->keyword)
                return (0);

        for (nitems = 0; src[nitems].keyword; nitems++)
                ;

        if (!(dst = (char **)Malloc((nitems + 1) * sizeof(char *)))) {
                errno = ENOMEM;
                return (0);
        }

        for (n = 0; n < nitems; n++)
                dst[n] = template_to_s(src[n]);
        dst[nitems] = 0;

        return (dst);
}

/**
 ** q_strpbrk() - strpbrk() WITH BACKSLASH QUOTING
 ** q_strdup() - strdup() WITH BACKSLASHES OMITTED
 **/

static char *
#if     defined(__STDC__)
q_strchr (
        char *                  sp,
        char                    c
)
#else
q_strchr (sp, c)
        register char           *sp,
                                c;
#endif
{
        do {
                if (*sp == '\\' && sp[1])
                        sp += 2;
                if (*sp == c)
                        return (sp);
        } while (*sp++);
        return (0);
}

static char *
#if     defined(__STDC__)
q_strdup (
        char *                  str
)
#else
q_strdup (str)
        char                    *str;
#endif
{
        char                    *ret;

        register char           *p,
                                *q;

        register int            len     = 0;


        for (p = str; *p; p++) {
                if (*p == '\\' && p[1] == '=')
                        p++;
                len++;
        }

        if (!(ret = q = Malloc(len + 1)))
                return (0);

        for (p = str; *p; p++) {
                if (*p == '\\' && p[1] == '=')
                        p++;
                *q++ = *p;
        }
        *q = 0;

        return (ret);
}