Imported Upstream version 2.19.1

[platform/upstream/git.git] / xdiff-interface.h

diff --git a/xdiff-interface.h b/xdiff-interface.h
index eff7762..135fc05 100644 (file)
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -1,8 +1,16 @@
 #ifndef XDIFF_INTERFACE_H
 #define XDIFF_INTERFACE_H
 
+#include "cache.h"
 #include "xdiff/xdiff.h"
 
+/*
+ * xdiff isn't equipped to handle content over a gigabyte;
+ * we make the cutoff 1GB - 1MB to give some breathing
+ * room for constant-sized additions (e.g., merge markers)
+ */
+#define MAX_XDIFF_SIZE (1024UL * 1024 * 1023)
+
 typedef void (*xdiff_emit_consume_fn)(void *, char *, unsigned long);
 
 int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb);
@@ -13,7 +21,7 @@ int parse_hunk_header(char *line, int len,
                      int *ob, int *on,
                      int *nb, int *nn);
 int read_mmfile(mmfile_t *ptr, const char *filename);
-void read_mmblob(mmfile_t *ptr, const unsigned char *sha1);
+void read_mmblob(mmfile_t *ptr, const struct object_id *oid);
 int buffer_is_binary(const char *ptr, unsigned long size);
 
 extern void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags);
@@ -21,4 +29,20 @@ extern void xdiff_clear_find_func(xdemitconf_t *xecfg);
 extern int git_xmerge_config(const char *var, const char *value, void *cb);
 extern int git_xmerge_style;
 
+/*
+ * Compare the strings l1 with l2 which are of size s1 and s2 respectively.
+ * Returns 1 if the strings are deemed equal, 0 otherwise.
+ * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
+ * are treated for the comparision.
+ */
+extern int xdiff_compare_lines(const char *l1, long s1,
+                              const char *l2, long s2, long flags);
+
+/*
+ * Returns a hash of the string s of length len.
+ * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
+ * are treated for the hash.
+ */
+extern unsigned long xdiff_hash_string(const char *s, size_t len, long flags);
+
 #endif