/*
 * 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 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

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

#define BACKSLASH       '\\'
#define BACKBACK        "\\\\"

extern char *strcat();

static char retbuffer[1024];
static char ret2buffer[1024];

/*
 *  Remove the padding sequences from the input string.
 *  Return the new string without the padding sequences
 *  and the padding itself in padbuffer.
 */
char
*rmpadding(char *str, char *padbuffer, int *padding)
{
        static char rmbuffer[1024];
        register char ch;
        register char *pbufptr;
        register char *retptr = rmbuffer;
        char *svbufptr;
        int padbylines = 0;
        int paddigits = 0;
        int paddecimal = 0;

        padbuffer[0] = rmbuffer[0] = '\0';
        if (padding)
                *padding = 0;
        if (str == NULL)
                return (rmbuffer);

        while (ch = (*str++ & 0377))
                switch (ch) {
                        case '$':
                                if (*str == '<') {
                                        svbufptr = ++str;       /* skip '<' */

                                        /* copy number */
                                        pbufptr = padbuffer;
                                        for (; *str && isdigit(*str); str++) {
                                                *svbufptr++ = *str;
                                                *pbufptr++ = *str;
                                        }
                                        *pbufptr = '\0';
                                        paddigits += atoi(padbuffer);
                                        /* check for decimal */
                                        if (*str == '.') {
                                                str++;
                                                pbufptr = padbuffer;
                                                for (; *str && isdigit(ch);
                                                    str++) {
                                                        *svbufptr++ = *str;
                                                        *pbufptr++ = *str;
                                                }
                                                *pbufptr = '\0';
                                                paddecimal += atoi(padbuffer);
                                        }
                                        for (; (*str == '*') || (*str == '/');
                                            str++) {
                                                if (*str == '*')
                                                        padbylines = 1;
                        /* Termcap does not support mandatory padding */
                        /* marked with /. Just remove it. */
                                                else {
                                                        extern char *progname;
                                                        (void) fprintf(stderr,
                                                            "%s: mandatory "
                                                            "padding removed\n",
                                                            progname);
                                                }
                                        }
                        /* oops, not a padding spec after all */
                        /* put us back after the '$<' */
                                        if (*str != '>') {
                                                str = svbufptr;
                                                *retptr++ = '$';
                                                *retptr++ = '<';
                                        } else
                                                str++;  /* skip the '>' */
                        /* Flag padding info that is not at the end */
                        /* of the string. */
                                        if (*str != '\0') {
                                                extern char *progname;
                                                (void) fprintf(stderr,
                                                    "%s: padding information "
                                                    "moved to end\n", progname);
                                        }
                                } else
                                        *retptr++ = ch;
                                break;

                        default:
                                *retptr++ = ch;
                }
        *retptr = '\0';

        if (paddecimal > 10) {
                paddigits += paddecimal / 10;
                paddecimal %= 10;
        }

        if (paddigits > 0 && paddecimal > 0)
                (void) sprintf(padbuffer, "%d.%d", paddigits, paddecimal);
        else if (paddigits > 0)
                (void) sprintf(padbuffer, "%d", paddigits);
        else if (paddecimal > 0)
                (void) sprintf(padbuffer, ".%d", paddecimal);
        if (padbylines)
                (void) strcat(padbuffer, "*");
        if (padding)
                *padding = paddecimal;
        return (rmbuffer);
}

/*
 *  Convert a character, making appropriate changes to make it printable
 *  for a termcap source entry. Change escape, tab, etc., into their
 *  appropriate equivalents. Return the number of characters printed.
 */
char
*cconvert(char *string)
{
        register int c;
        register char *retptr = retbuffer;

        retbuffer[0] = '\0';
        if (string == NULL)
                return (retbuffer);

        while (c = *string++) {
                /* should check here to make sure that there is enough room */
                /* in retbuffer and realloc it if necessary. */
                c &= 0377;
                /* we ignore the return value from sprintf because BSD/V7 */
                /* systems return a (char *) rather than an int. */
                if (c >= 0200) {
                        (void) sprintf(retptr, "\\%.3o", c); retptr += 4; }
                else if (c == '\033') {
                        (void) sprintf(retptr, "\\E"); retptr += 2; }
                else if (c == '\t') {
                        (void) sprintf(retptr, "\\t"); retptr += 2; }
                else if (c == '\b') {
                        (void) sprintf(retptr, "\\b"); retptr += 2; }
                else if (c == '\f') {
                        (void) sprintf(retptr, "\\f"); retptr += 2; }
                else if (c == '\n') {
                        (void) sprintf(retptr, "\\n"); retptr += 2; }
                else if (c == '\r') {
                        (void) sprintf(retptr, "\\r"); retptr += 2; }

                /* unfortunately \: did not work */
                else if (c == ':') {
                        (void) sprintf(retptr, "\\072"); retptr += 4; }
                else if (c == '^') {
                        (void) sprintf(retptr, "\\^"); retptr += 2; }
                else if (c == BACKSLASH) {
                        (void) sprintf(retptr, BACKBACK); retptr += 2; }
                else if (c < ' ' || c == 0177) {
                        (void) sprintf(retptr, "^%c", c ^ 0100); retptr += 2; }
                else {
                        (void) sprintf(retptr, "%c", c); retptr++; }
        }
        *retptr = '\0';
        return (retbuffer);
}

/*
 *  Convert the terminfo string into a termcap string.
 *  Most of the work is done by rmpadding() above and cconvert(); this
 *  function mainly just pieces things back together. A pointer to the
 *  return buffer is returned.
 *
 *  NOTE: Some things can not be done at all: converting the terminfo
 *  parameterized strings into termcap parameterized strings.
 */

char
*cexpand(char *str)
{
        char padbuffer[512];
        char *retptr;

        retptr = rmpadding(str, padbuffer, (int *)0);
        (void) sprintf(ret2buffer, "%s%s", padbuffer, cconvert(retptr));

        return (ret2buffer);
}

/*
 *  Print out a string onto a stream, changing unprintables into
 *  termcap printables.
 */
int
cpr(FILE *stream, char *string)
{
        register char *ret;
        if (string != NULL) {
                ret = cexpand(string);
                (void) fprintf(stream, "%s", ret);
                return (strlen(ret));
        } else
                return (0);
}