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utils: add NM_UTILS_STRING_LOOKUP_TABLE() macro

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Thomas Haller
2015-12-07 14:16:04 +01:00
parent 01ea90b57a
commit a291ecc29c
1 changed files with 36 additions and 0 deletions
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36
src/NetworkManagerUtils.h
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@@ -229,6 +229,42 @@ const char *nm_utils_flags2str (const NMUtilsFlags2StrDesc *descs,
/*****************************************************************************/
#define _NM_UTILS_STRING_LOOKUP_TABLE_DEFINE(scope, fcn_name, lookup_type, unknown_val, ...) \
scope const char * \
fcn_name (lookup_type idx) \
{ \
static const char *const descs[] = { \
__VA_ARGS__ \
}; \
if ((gssize) idx >= 0 && idx < G_N_ELEMENTS (descs)) \
return descs[idx]; \
return unknown_val; \
}
#define NM_UTILS_STRING_LOOKUP_TABLE_DEFINE(fcn_name, lookup_type, unknown_val, ...) \
_NM_UTILS_STRING_LOOKUP_TABLE_DEFINE (, fcn_name, lookup_type, unknown_val, __VA_ARGS__)
#define NM_UTILS_STRING_LOOKUP_TABLE_DEFINE_STATIC(fcn_name, lookup_type, unknown_val, ...) \
_NM_UTILS_STRING_LOOKUP_TABLE_DEFINE (static, fcn_name, lookup_type, unknown_val, __VA_ARGS__)
/* Call the string-lookup-table function @fcn_name. If the function returns
* %NULL, the numeric index is converted to string using a alloca() buffer.
* Beware: this macro uses alloca(). */
#define NM_UTILS_STRING_LOOKUP_TABLE(fcn_name, idx) \
({ \
typeof (idx) _idx = (idx); \
const char *_s; \
\
_s = fcn_name (_idx); \
if (!_s) { \
_s = g_alloca (30); \
\
g_snprintf ((char *) _s, 30, "(%lld)", (long long) _idx); \
} \
_s; \
})
/*****************************************************************************/
void nm_utils_strbuf_append (char **buf, gsize *len, const char *format, ...) __attribute__((__format__ (__printf__, 3, 4)));
void nm_utils_strbuf_append_c (char **buf, gsize *len, char c);
void nm_utils_strbuf_append_str (char **buf, gsize *len, const char *str);