45 lines
1.5 KiB
Diff
45 lines
1.5 KiB
Diff
diff --git a/src/lib/libc/contrib/tzcode/stdtime/localtime.c b/src/lib/libc/contrib/tzcode/stdtime/localtime.c
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index 3c66924..05c01ae 100644
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--- src/lib/libc/contrib/tzcode/stdtime/localtime.c
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+++ src/lib/libc/contrib/tzcode/stdtime/localtime.c
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@@ -1935,6 +1935,10 @@ time2sub(struct tm *const tmp,
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lo *= 2;
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hi = -(lo + 1);
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}
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+
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+ lo = TIME_T_MIN;
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+ hi = TIME_T_MAX;
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+
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for ( ; ; ) {
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t = lo / 2 + hi / 2;
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if (t < lo)
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diff --git a/src/lib/libc/contrib/tzcode/stdtime/private.h b/src/lib/libc/contrib/tzcode/stdtime/private.h
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index 354a78b..8300ba0 100644
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--- src/lib/libc/contrib/tzcode/stdtime/private.h
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+++ src/lib/libc/contrib/tzcode/stdtime/private.h
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@@ -251,6 +251,24 @@ const char * scheck(const char * string, const char * format);
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1 + TYPE_SIGNED(type))
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#endif /* !defined INT_STRLEN_MAXIMUM */
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+#define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0)
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+
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+/* Max and min values of the integer type T, of which only the bottom
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+ B bits are used, and where the highest-order used bit is considered
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+ to be a sign bit if T is signed. */
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+#define MAXVAL(t, b) \
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+ ((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t))) \
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+ - 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))))
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+#define MINVAL(t, b) \
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+ ((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0))
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+
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+/* The extreme time values, assuming no padding. */
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+#define TIME_T_MIN_NO_PADDING MINVAL(time_t, TYPE_BIT(time_t))
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+#define TIME_T_MAX_NO_PADDING MAXVAL(time_t, TYPE_BIT(time_t))
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+
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+# define TIME_T_MIN TIME_T_MIN_NO_PADDING
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+# define TIME_T_MAX TIME_T_MAX_NO_PADDING
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+
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/*
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** INITIALIZE(x)
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*/
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