wsutil/feature_list.c

   1 /* feature_list.c
   2  * Routines for gathering and handling lists of present/absent features
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include <stdbool.h>
  12
  13 #include "config.h"
  14
  15 #include <wsutil/feature_list.h>
  16
  17 #if !GLIB_CHECK_VERSION(2, 68, 0)
  18 static GString*
  19 g_string_find_and_erase(GString *string, const char* find)
  20 {
  21     /* Find and erases find a single time. */
  22     const char* pos = strstr(string->str, find);
  23     if (pos != NULL) {
  24         g_string_erase(string, pos - string->str, strlen(find));
  25     }
  26     return string;
  27 }
  28 #endif
  29
  30 void
  31 with_feature(feature_list l, const char *fmt, ...)
  32 {
  33     va_list arg;
  34     GString *msg = g_string_new("+");
  35     va_start(arg, fmt);
  36     g_string_append_vprintf(msg, fmt, arg);
  37     va_end(arg);
  38     /* Strip "version" from the string */
  39 #if GLIB_CHECK_VERSION(2, 68, 0)
  40     g_string_replace(msg, " version", "", 0);
  41     g_string_replace(msg, " based on", "", 0);
  42 #else
  43     g_string_find_and_erase(msg, " version");
  44     g_string_find_and_erase(msg, " based on");
  45 #endif
  46     *l = g_list_prepend(*l, g_string_free(msg, FALSE));
  47 }
  48
  49 void
  50 without_feature(feature_list l, const char *fmt, ...)
  51 {
  52     va_list arg;
  53     GString *msg = g_string_new("-");
  54     va_start(arg, fmt);
  55     g_string_append_vprintf(msg, fmt, arg);
  56     va_end(arg);
  57     *l = g_list_prepend(*l, g_string_free(msg, FALSE));
  58 }
  59
  60 static int
  61 feature_sort_alpha(const void *a, const void *b)
  62 {
  63     return g_ascii_strcasecmp((char *)a + 1, (char *)b + 1);
  64 }
  65
  66 void
  67 sort_features(feature_list l)
  68 {
  69     *l = g_list_sort(*l, feature_sort_alpha);
  70 }
  71
  72 void
  73 separate_features(feature_list l, feature_list with_list, feature_list without_list)
  74 {
  75     GList *iter;
  76     gchar *data;
  77     for (iter = *l; iter != NULL; iter = iter->next) {
  78         data = (gchar *)iter->data;
  79         if (data[0] == '+')
  80             *with_list = g_list_prepend(*with_list, g_strdup(data));
  81         else
  82             *without_list = g_list_prepend(*without_list, g_strdup(data));
  83     }
  84     *with_list = g_list_reverse(*with_list);
  85     *without_list = g_list_reverse(*without_list);
  86 }
  87
  88 void
  89 free_features(feature_list l)
  90 {
  91     g_list_free_full(*l, g_free);
  92     *l = NULL;
  93 }