X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=git-compat-util.h;h=d0a1e480b6445a6f5ba3680672c255ab44ca43f0;hb=20f84c8f56519b49fa91bb6cef8f8978c2ab4e09;hp=81883e7270daadafb4d827e894fa4645ff2e2b66;hpb=9f0ccb5b0ac067b3408d3776bb06f85acd4a1e7e;p=git.git

diff --git a/git-compat-util.h b/git-compat-util.h
index 81883e727..d0a1e480b 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -28,6 +28,18 @@
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 #define bitsizeof(x)  (CHAR_BIT * sizeof(x))
 
+#define maximum_signed_value_of_type(a) \
+    (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
+
+/*
+ * Signed integer overflow is undefined in C, so here's a helper macro
+ * to detect if the sum of two integers will overflow.
+ *
+ * Requires: a >= 0, typeof(a) equals typeof(b)
+ */
+#define signed_add_overflows(a, b) \
+    ((b) > maximum_signed_value_of_type(a) - (a))
+
 #ifdef __GNUC__
 #define TYPEOF(x) (__typeof__(x))
 #else
@@ -92,9 +104,10 @@
 #include <assert.h>
 #include <regex.h>
 #include <utime.h>
+#include <syslog.h>
+#include <sys/poll.h>
 #ifndef __MINGW32__
 #include <sys/wait.h>
-#include <sys/poll.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <termios.h>
@@ -374,6 +387,14 @@ static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 }
 #endif
 
+#ifdef NO_INET_PTON
+int inet_pton(int af, const char *src, void *dst);
+#endif
+
+#ifdef NO_INET_NTOP
+const char *inet_ntop(int af, const void *src, char *dst, size_t size);
+#endif
+
 extern void release_pack_memory(size_t, int);
 
 typedef void (*try_to_free_t)(size_t);