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core: add utility function str_if_set()

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Signed-off-by: Thomas Haller <thaller@redhat.com>
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Thomas Haller
2014-06-24 10:45:44 +02:00
parent 724fc736fe
commit ed3f598f63
1 changed files with 16 additions and 0 deletions
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16
src/NetworkManagerUtils.h
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@@ -43,6 +43,22 @@ int nm_spawn_process (const char *args);
/* macro to return strlen() of a compile time string. */ /* macro to return strlen() of a compile time string. */
#define STRLEN(str) ( sizeof ("" str) - 1 ) #define STRLEN(str) ( sizeof ("" str) - 1 )
/**
* str_if_set:
* @str: input string that will be returned if @str is not %NULL
* @fallback: if @str is %NULL, return @fallback instead
*
* This utility function is useful when printing a string to avoid passing
* %NULL. E.g. printf ("%s", str_if_set (get_string(), "(none)"));
*
* Returns: either @str or @fallback, depending on whether @str is %NULL.
*/
static inline const char *
str_if_set (const char *str, const char *fallback)
{
return str ? str : fallback;
}
gboolean nm_match_spec_string (const GSList *specs, const char *string); gboolean nm_match_spec_string (const GSList *specs, const char *string);
gboolean nm_match_spec_hwaddr (const GSList *specs, const char *hwaddr); gboolean nm_match_spec_hwaddr (const GSList *specs, const char *hwaddr);
gboolean nm_match_spec_s390_subchannels (const GSList *specs, const char *subchannels); gboolean nm_match_spec_s390_subchannels (const GSList *specs, const char *subchannels);