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g_option_context_help: don't modify the input data

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If there are options that need their names to be aliased, keep track
of that internally rather than modifying the passed-in GOptionGroup
(and leaking strings in the process).

https://bugzilla.gnome.org/show_bug.cgi?id=682560
This commit is contained in:
Dan Winship 2012-08-23 12:39:26 -04:00 committed by Matthias Clasen
parent ab328469f5
commit 39a528b9fd
1 changed files with 30 additions and 12 deletions
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42
glib/goption.c
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@ -557,10 +557,12 @@ g_option_context_add_main_entries (GOptionContext *context,
}
static gint
calculate_max_length (GOptionGroup *group)
calculate_max_length (GOptionGroup *group,
GHashTable *aliases)
{
GOptionEntry *entry;
gint i, len, max_length;
const gchar *long_name;
max_length = 0;
@ -571,7 +573,10 @@ calculate_max_length (GOptionGroup *group)
if (entry->flags & G_OPTION_FLAG_HIDDEN)
continue;
len = _g_utf8_strwidth (entry->long_name);
long_name = g_hash_table_lookup (aliases, &entry->long_name);
if (!long_name)
long_name = entry->long_name;
len = _g_utf8_strwidth (long_name);
if (entry->short_name)
len += 4;
@ -589,9 +594,11 @@ static void
print_entry (GOptionGroup *group,
gint max_length,
const GOptionEntry *entry,
GString *string)
GString *string,
GHashTable *aliases)
{
GString *str;
const gchar *long_name;
if (entry->flags & G_OPTION_FLAG_HIDDEN)
return;
@ -599,12 +606,16 @@ print_entry (GOptionGroup *group,
if (entry->long_name[0] == 0)
return;
long_name = g_hash_table_lookup (aliases, &entry->long_name);
if (!long_name)
long_name = entry->long_name;
str = g_string_new (NULL);
if (entry->short_name)
g_string_append_printf (str, " -%c, --%s", entry->short_name, entry->long_name);
g_string_append_printf (str, " -%c, --%s", entry->short_name, long_name);
else
g_string_append_printf (str, " --%s", entry->long_name);
g_string_append_printf (str, " --%s", long_name);
if (entry->arg_description)
g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
@ -716,6 +727,7 @@ g_option_context_get_help (GOptionContext *context,
gint i;
GOptionEntry *entry;
GHashTable *shadow_map;
GHashTable *aliases;
gboolean seen[256];
const gchar *rest_description;
GString *string;
@ -763,6 +775,7 @@ g_option_context_get_help (GOptionContext *context,
memset (seen, 0, sizeof (gboolean) * 256);
shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
aliases = g_hash_table_new_full (NULL, NULL, NULL, g_free);
if (context->main_group)
{
@ -789,7 +802,10 @@ g_option_context_get_help (GOptionContext *context,
entry = &g->entries[i];
if (g_hash_table_lookup (shadow_map, entry->long_name) &&
!(entry->flags & G_OPTION_FLAG_NOALIAS))
entry->long_name = g_strdup_printf ("%s-%s", g->name, entry->long_name);
{
g_hash_table_insert (aliases, &entry->long_name,
g_strdup_printf ("%s-%s", g->name, entry->long_name));
}
else
g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
@ -816,7 +832,7 @@ g_option_context_get_help (GOptionContext *context,
if (context->main_group)
{
len = calculate_max_length (context->main_group);
len = calculate_max_length (context->main_group, aliases);
max_length = MAX (max_length, len);
}
@ -829,7 +845,7 @@ g_option_context_get_help (GOptionContext *context,
max_length = MAX (max_length, len);
/* Then we go through the entries */
len = calculate_max_length (g);
len = calculate_max_length (g, aliases);
max_length = MAX (max_length, len);
list = list->next;
@ -878,7 +894,7 @@ g_option_context_get_help (GOptionContext *context,
g_string_append (string, TRANSLATE (group, group->description));
g_string_append (string, "\n");
for (i = 0; i < group->n_entries; i++)
print_entry (group, max_length, &group->entries[i], string);
print_entry (group, max_length, &group->entries[i], string, aliases);
g_string_append (string, "\n");
}
}
@ -898,7 +914,7 @@ g_option_context_get_help (GOptionContext *context,
g_string_append (string, "\n");
for (i = 0; i < g->n_entries; i++)
if (!(g->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
print_entry (g, max_length, &g->entries[i], string);
print_entry (g, max_length, &g->entries[i], string, aliases);
g_string_append (string, "\n");
}
@ -919,7 +935,7 @@ g_option_context_get_help (GOptionContext *context,
if (context->main_group)
for (i = 0; i < context->main_group->n_entries; i++)
print_entry (context->main_group, max_length,
&context->main_group->entries[i], string);
&context->main_group->entries[i], string, aliases);
while (list != NULL)
{
@ -928,7 +944,7 @@ g_option_context_get_help (GOptionContext *context,
/* Print main entries from other groups */
for (i = 0; i < g->n_entries; i++)
if (g->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
print_entry (g, max_length, &g->entries[i], string);
print_entry (g, max_length, &g->entries[i], string, aliases);
list = list->next;
}
@ -942,6 +958,8 @@ g_option_context_get_help (GOptionContext *context,
g_string_append (string, "\n");
}
g_hash_table_destroy (aliases);
return g_string_free (string, FALSE);
}