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[gnc-glib-utils] Define and export gnc_list_length_cmp

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This commit is contained in:
Christopher Lam 2021-11-01 22:17:50 +08:00
parent b5f5129f7d
commit 3dfdf60608
3 changed files with 47 additions and 0 deletions
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10
libgnucash/core-utils/gnc-glib-utils.c
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@ -351,3 +351,13 @@ gnc_g_list_stringjoin (GList *list_of_strings, const gchar *sep)
return retval;
}
gint
gnc_list_length_cmp (const GList *list, size_t len)
{
for (GList *lst = (GList*) list;; lst = g_list_next (lst), len--)
{
if (!lst) return (len ? -1 : 0);
if (!len) return 1;
}
}

14
libgnucash/core-utils/gnc-glib-utils.h
View File

@ -199,6 +199,20 @@ void gnc_scm_log_debug(const gchar *msg);
**/
gchar * gnc_g_list_stringjoin (GList *list_of_strings, const gchar *sep);
/**
* @brief Scans the GList elements the minimum number of iterations
* required to test it against a specified size. Returns -1, 0 or 1
* depending on whether the GList length has less, same, or more
* elements than the size specified.
*
* @param lst A GList
*
* @param len the comparator length to compare the GList length with
*
* @return A signed int comparing GList length with specified size.
**/
gint gnc_list_length_cmp (const GList *list, size_t len);
/** Kill a process. On UNIX send a SIGKILL, on Windows call TerminateProcess.
*
* @param pid The process ID. */

23
libgnucash/core-utils/test/test-gnc-glib-utils.c
View File

@ -110,6 +110,28 @@ test_g_list_stringjoin (gconstpointer data)
g_list_free (test);
}
static void
test_gnc_list_length (gconstpointer data)
{
GList *lst = NULL;
g_assert (gnc_list_length_cmp (lst, 0) == 0);
g_assert (gnc_list_length_cmp (lst, 1) == -1);
lst = g_list_prepend (lst, (gpointer)1);
g_assert (gnc_list_length_cmp (lst, 0) == 1);
g_assert (gnc_list_length_cmp (lst, 1) == 0);
g_assert (gnc_list_length_cmp (lst, 2) == -1);
lst = g_list_prepend (lst, (gpointer)2);
g_assert (gnc_list_length_cmp (lst, 1) == 1);
g_assert (gnc_list_length_cmp (lst, 2) == 0);
g_assert (gnc_list_length_cmp (lst, 3) == -1);
g_list_free (lst);
}
int
main (int argc, char *argv[])
{
@ -119,6 +141,7 @@ main (int argc, char *argv[])
g_test_add_data_func ("/core-utils/gnc_utf8_strip_invalid_and_controls invalid utf8", (gconstpointer)invalid_utf8, test_gnc_utf8_strip_invalid_and_controls);
g_test_add_data_func ("/core-utils/gnc_utf8_strip_invalid_and_controls control chars", (gconstpointer)controls, test_gnc_utf8_strip_invalid_and_controls);
g_test_add_data_func ("/core-utils/gnc_g_list_stringjoin", NULL, test_g_list_stringjoin);
g_test_add_data_func ("/core-utils/gnc_list_length", NULL, test_gnc_list_length);
return g_test_run();
}