/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2005 Poul-Henning Kamp
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <namespace.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <wchar.h>
#include <vis.h>
#include <assert.h>
#include <sys/time.h>
#include "printf.h"

int
__printf_arginfo_quote(const struct printf_info *pi __unused, size_t n, int *argt)
{

        assert(n >= 1);
        argt[0] = PA_POINTER;
        return (1);
}

int
__printf_render_quote(struct __printf_io *io, const struct printf_info *pi __unused, const void *const *arg)
{
        const char *str, *p, *t, *o;
        char r[5];
        int i, ret;

        str = *((const char *const *)arg[0]);
        if (str == NULL)
                return (__printf_out(io, pi, "\"(null)\"", 8));
        if (*str == '\0')
                return (__printf_out(io, pi, "\"\"", 2));

        for (i = 0, p = str; *p; p++)
                if (isspace(*p) || *p == '\\' || *p == '"')
                        i++;
        if (!i) 
                return (__printf_out(io, pi, str, strlen(str)));
        
        ret = __printf_out(io, pi, "\"", 1);
        for (t = p = str; *p; p++) {
                o = NULL;
                if (*p == '\\')
                        o = "\\\\";
                else if (*p == '\n')
                        o = "\\n";
                else if (*p == '\r')
                        o = "\\r";
                else if (*p == '\t')
                        o = "\\t";
                else if (*p == ' ')
                        o = " ";
                else if (*p == '"')
                        o = "\\\"";
                else if (isspace(*p)) {
                        sprintf(r, "\\%03o", *p);
                        o = r;
                } else
                        continue;
                if (p != t)
                        ret += __printf_out(io, pi, t, p - t);
                ret += __printf_out(io, pi, o, strlen(o));
                t = p + 1;
        }
        if (p != t)
                ret += __printf_out(io, pi, t, p - t);
        ret += __printf_out(io, pi, "\"", 1);
        __printf_flush(io);
        return(ret);
}