filter-branch: eliminate duplicate mapped parents

diff --git a/git-compat-util.h b/git-compat-util.h
index adbfb5e42fe68b0bdd72774f416791933cbdb372..e6a4159a25ea2c4f98840b86994425e898cf134c 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -343,8 +343,11 @@ extern int ends_with(const char *str, const char *suffix);
 
 static inline const char *skip_prefix(const char *str, const char *prefix)
 {
-       size_t len = strlen(prefix);
-       return strncmp(str, prefix, len) ? NULL : str + len;
+       do {
+               if (!*prefix)
+                       return str;
+       } while (*str++ == *prefix++);
+       return NULL;
 }
 
 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
@@ -528,6 +531,7 @@ extern void *xcalloc(size_t nmemb, size_t size);
 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 extern ssize_t xread(int fd, void *buf, size_t len);
 extern ssize_t xwrite(int fd, const void *buf, size_t len);
+extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 extern int xdup(int fd);
 extern FILE *xfdopen(int fd, const char *mode);
 extern int xmkstemp(char *template);
@@ -713,4 +717,11 @@ void warn_on_inaccessible(const char *path);
 /* Get the passwd entry for the UID of the current process. */
 struct passwd *xgetpwuid_self(void);
 
+#ifdef GMTIME_UNRELIABLE_ERRORS
+struct tm *git_gmtime(const time_t *);
+struct tm *git_gmtime_r(const time_t *, struct tm *);
+#define gmtime git_gmtime
+#define gmtime_r git_gmtime_r
+#endif
+
 #endif