/*-
 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
 * 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,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 *
 * $FreeBSD: src/tools/tools/net80211/wlanstats/statfoo.c,v 1.4 2008/04/30 19:47:31 sam Exp $
 */

#include <stdio.h>
#include <string.h>

#include "statfoo.h"

static void
statfoo_setfmt(struct statfoo *sf, const char *fmt0)
{
#define N(a)    (sizeof(a)/sizeof(a[0]))
        char fmt[4096];
        char *fp, *tok;
        int i, j, field;

        j = field = 0;
        strlcpy(fmt, fmt0, sizeof(fmt));
        for (fp = fmt; (tok = strsep(&fp, ", ")) != NULL;) {
                for (i = 0; i < sf->nstats; i++)
                        if (strcasecmp(tok, sf->stats[i].name) == 0)
                                break;
                if (i >= sf->nstats) {
                        fprintf(stderr, "%s: unknown statistic name \"%s\" "
                                "skipped\n", sf->name, tok);
                        continue;
                }
                if (j+3 > sizeof(sf->fmts)) {
                        fprintf(stderr, "%s: not enough room for all stats; "
                                "stopped at %s\n", sf->name, tok);
                        break;
                }
                if (field > 127) {
                        fprintf(stderr, "%s: too many fields; "
                                "stopped at %s\n", sf->name, tok);
                        break;
                }
                if (j != 0)
                        sf->fmts[j++] = ' ';
                sf->fmts[j++] = 0x80 | field;
                sf->fields[field++] = i;
        }
        sf->fmts[j] = '\0';
#undef N
}

static void
statfoo_collect(struct statfoo *sf)
{
        fprintf(stderr, "%s: don't know how to collect data\n", sf->name);
}

static void
statfoo_update_tot(struct statfoo *sf)
{
        fprintf(stderr, "%s: don't know how to update total data\n", sf->name);
}

static int
statfoo_get(struct statfoo *sf, int s, char b[], size_t bs)
{
        fprintf(stderr, "%s: don't know how to get stat #%u\n", sf->name, s);
        return 0;
}

static void
statfoo_print_header(struct statfoo *sf, FILE *fd)
{
        const unsigned char *cp;

        for (cp = sf->fmts; *cp != '\0'; cp++) {
                if (*cp & 0x80) {
                        int six = sf->fields[*cp &~ 0x80];
                        const struct fmt *f = &sf->stats[six];
                        fprintf(fd, "%*s", f->width, f->label);
                } else
                        putc(*cp, fd);
        }
        putc('\n', fd);
}

static void
statfoo_print_current(struct statfoo *sf, FILE *fd)
{
        char buf[32];
        const unsigned char *cp;

        for (cp = sf->fmts; *cp != '\0'; cp++) {
                if (*cp & 0x80) {
                        int six = sf->fields[*cp &~ 0x80];
                        const struct fmt *f = &sf->stats[six];
                        if (sf->get_curstat(sf, six, buf, sizeof(buf)))
                                fprintf(fd, "%*s", f->width, buf);
                } else
                        putc(*cp, fd);
        }
        putc('\n', fd);
}

static void
statfoo_print_total(struct statfoo *sf, FILE *fd)
{
        char buf[32];
        const unsigned char *cp;

        for (cp = sf->fmts; *cp != '\0'; cp++) {
                if (*cp & 0x80) {
                        int six = sf->fields[*cp &~ 0x80];
                        const struct fmt *f = &sf->stats[six];
                        if (sf->get_totstat(sf, six, buf, sizeof(buf)))
                                fprintf(fd, "%*s", f->width, buf);
                } else
                        putc(*cp, fd);
        }
        putc('\n', fd);
}

static void
statfoo_print_verbose(struct statfoo *sf, FILE *fd)
{
        const struct fmt *f;
        char s[32];
        int i, width;

        width = 0;
        for (i = 0; i < sf->nstats; i++) {
                f = &sf->stats[i];
                if (f->width > width)
                        width = f->width;
        }
        for (i = 0; i < sf->nstats; i++) {
                f = &sf->stats[i];
                if (sf->get_totstat(sf, i, s, sizeof(s)) && strcmp(s, "0"))
                        fprintf(fd, "%-*s %s\n", width, s, f->desc);
        }
}

static void
statfoo_print_fields(struct statfoo *sf, FILE *fd)
{
        int i, w, width;

        width = 0;
        for (i = 0; i < sf->nstats; i++) {
                w = strlen(sf->stats[i].name);
                if (w > width)
                        width = w;
        }
        for (i = 0; i < sf->nstats; i++) {
                const struct fmt *f = &sf->stats[i];
                if (f->width != 0)
                        fprintf(fd, "%-*s %s\n", width, f->name, f->desc);
        }
}

void
statfoo_init(struct statfoo *sf, const char *name, const struct fmt *stats, int nstats)
{
        sf->name = name;
        sf->stats = stats;
        sf->nstats = nstats;
        sf->setfmt = statfoo_setfmt;
        sf->collect_cur = statfoo_collect;
        sf->collect_tot = statfoo_collect;
        sf->update_tot = statfoo_update_tot;
        sf->get_curstat = statfoo_get;
        sf->get_totstat = statfoo_get;
        sf->print_header = statfoo_print_header;
        sf->print_current = statfoo_print_current;
        sf->print_total = statfoo_print_total;
        sf->print_verbose = statfoo_print_verbose;
        sf->print_fields = statfoo_print_fields;
}