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add TK_ISFINITE

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lixianjing 2021-06-29 08:23:29 +08:00
parent a2a54d40b4
commit 775b4f479f
1 changed files with 8 additions and 0 deletions
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8
src/tkc/types_def.h
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@ -415,4 +415,12 @@ typedef struct _event_source_manager_t event_source_manager_t;
#define TK_DEFAULT_WAIT_TIME 16
#endif /*TK_DEFAULT_WAIT_TIME*/
/*from cairo/cairo/cairoint.h*/
#if _XOPEN_SOURCE >= 600 || defined (_ISOC99_SOURCE)
#define TK_ISFINITE(x) isfinite (x)
#else
#define TK_ISFINITE(x) ((x) * (x) >= 0.) /* check for NaNs */
#endif
#endif /*TYPES_DEF_H*/