/* feature_list.c

 * Routines for gathering and handling lists of present/absent features

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 */

#include <stdbool.h>

#include "config.h"

#include <wsutil/feature_list.h>

#if !GLIB_CHECK_VERSION(2, 68, 0)

static GString*

g_string_find_and_erase(GString *string, const char* find)

{

    /* Find and erases find a single time. */

    const char* pos = strstr(string->str, find);

    if (pos != NULL) {

        g_string_erase(string, pos - string->str, strlen(find));

    }

    return string;

}

#endif

void

with_feature(feature_list l, const char *fmt, ...)

{

    va_list arg;

    GString *msg = g_string_new("+");

    va_start(arg, fmt);

    g_string_append_vprintf(msg, fmt, arg);

    va_end(arg);

    /* Strip "version" from the string */

#if GLIB_CHECK_VERSION(2, 68, 0)

    g_string_replace(msg, " version", "", 0);

    g_string_replace(msg, " based on", "", 0);

#else

    g_string_find_and_erase(msg, " version");

    g_string_find_and_erase(msg, " based on");

#endif

    *l = g_list_prepend(*l, g_string_free(msg, FALSE));

}

void

without_feature(feature_list l, const char *fmt, ...)

{

    va_list arg;

    GString *msg = g_string_new("-");

    va_start(arg, fmt);

    g_string_append_vprintf(msg, fmt, arg);

    va_end(arg);

    *l = g_list_prepend(*l, g_string_free(msg, FALSE));

}

static int

feature_sort_alpha(const void *a, const void *b)

{

    return g_ascii_strcasecmp((char *)a + 1, (char *)b + 1);

}

void

sort_features(feature_list l)

{

    *l = g_list_sort(*l, feature_sort_alpha);

}

void

separate_features(feature_list l, feature_list with_list, feature_list without_list)

{

    GList *iter;

    char *data;

    for (iter = *l; iter != NULL; iter = iter->next) {

        data = (char *)iter->data;

        if (data[0] == '+')

            *with_list = g_list_prepend(*with_list, g_strdup(data));

        else

            *without_list = g_list_prepend(*without_list, g_strdup(data));

    }

    *with_list = g_list_reverse(*with_list);

    *without_list = g_list_reverse(*without_list);

}

void

free_features(feature_list l)

{

    g_list_free_full(*l, g_free);

    *l = NULL;

}