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core: add macro STRLEN

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Returns the length of a string at compile time. Contrary to strlen(),
which is a run time expression -- even if the compler might be able to
optimize strlen() for string constants.

Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller
2014-03-14 14:26:12 +01:00
parent 408ecd6b5f
commit a72079a862
1 changed files with 3 additions and 0 deletions
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3
src/NetworkManagerUtils.h
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@@ -40,6 +40,9 @@ void nm_utils_ip6_address_clear_host_address (struct in6_addr *dst, const struct
int nm_spawn_process (const char *args); int nm_spawn_process (const char *args);
/* macro to return strlen() of a compile time string. */
#define STRLEN(str) ( sizeof ("" str) - 1 )
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);