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authorSergey Cherkashin <4erkashin@list.ru>2017-10-03 15:26:34 +0300
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2017-11-03 20:23:10 +0100
commitea38f4d89c9698895b1cf53a5946429dc1d8bbaa (patch)
treee05828ca1fedf55f104b837bc9c44215c2978e99 /include/math.h
parent68de9946e914d8c30dcc6667a059ea59e5b74cac (diff)
math: add exception handling functionality
According to standards SVID and SYSV. Modified lgamma calling in case when 'signgam' variable should not be used. Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Diffstat (limited to 'include/math.h')
-rw-r--r--include/math.h26
1 files changed, 25 insertions, 1 deletions
diff --git a/include/math.h b/include/math.h
index 25454764a..70f04f230 100644
--- a/include/math.h
+++ b/include/math.h
@@ -192,6 +192,30 @@ extern long double __REDIRECT_NTH (nexttowardl, (long double __x, long double __
#if defined __USE_MISC || defined __USE_XOPEN
/* This variable is used by `gamma' and `lgamma'. */
extern int signgam;
+#else
+/* This is used when standart of libm
+ * should prevent lgamma(x) of modifying signgam variable.
+ */
+# define lgammaf(arg) \
+({ \
+int local_signgam = 0; \
+float result = lgammaf_r((float)arg, &local_signgam); \
+result; \
+})
+
+# define lgamma(arg) \
+({ \
+int local_signgam = 0; \
+double result = lgamma_r(arg, &local_signgam); \
+result; \
+})
+
+# define lgammal(arg) \
+({ \
+int local_signgam = 0; \
+long double result = lgammal_r(arg, &local_signgam); \
+result; \
+})
#endif
@@ -361,7 +385,7 @@ struct exception
# ifdef __cplusplus
extern int matherr (struct __exception *__exc) throw ();
# else
-extern int matherr (struct exception *__exc);
+extern int __attribute__ ((weak)) matherr (struct exception *__exc);
# endif
# define X_TLOSS 1.41484755040568800000e+16