xdiff-interface.h

   1 #ifndef XDIFF_INTERFACE_H
   2 #define XDIFF_INTERFACE_H
   3
   4 #include "cache.h"
   5 #include "xdiff/xdiff.h"
   6
   7 /*
   8  * xdiff isn't equipped to handle content over a gigabyte;
   9  * we make the cutoff 1GB - 1MB to give some breathing
  10  * room for constant-sized additions (e.g., merge markers)
  11  */
  12 #define MAX_XDIFF_SIZE (1024UL * 1024 * 1023)
  13
  14 typedef void (*xdiff_emit_line_fn)(void *, char *, unsigned long);
  15 typedef void (*xdiff_emit_hunk_fn)(void *data,
  16                                    long old_begin, long old_nr,
  17                                    long new_begin, long new_nr,
  18                                    const char *func, long funclen);
  19
  20 int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb);
  21 int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2,
  22                   xdiff_emit_hunk_fn hunk_fn,
  23                   xdiff_emit_line_fn line_fn,
  24                   void *consume_callback_data,
  25                   xpparam_t const *xpp, xdemitconf_t const *xecfg);
  26 int read_mmfile(mmfile_t *ptr, const char *filename);
  27 void read_mmblob(mmfile_t *ptr, const struct object_id *oid);
  28 int buffer_is_binary(const char *ptr, unsigned long size);
  29
  30 extern void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags);
  31 extern void xdiff_clear_find_func(xdemitconf_t *xecfg);
  32 extern int git_xmerge_config(const char *var, const char *value, void *cb);
  33 extern int git_xmerge_style;
  34
  35 /*
  36  * Can be used as a no-op hunk_fn for xdi_diff_outf(), since a NULL
  37  * one just sends the hunk line to the line_fn callback).
  38  */
  39 void discard_hunk_line(void *priv,
  40                        long ob, long on, long nb, long nn,
  41                        const char *func, long funclen);
  42
  43 /*
  44  * Compare the strings l1 with l2 which are of size s1 and s2 respectively.
  45  * Returns 1 if the strings are deemed equal, 0 otherwise.
  46  * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
  47  * are treated for the comparision.
  48  */
  49 extern int xdiff_compare_lines(const char *l1, long s1,
  50                                const char *l2, long s2, long flags);
  51
  52 /*
  53  * Returns a hash of the string s of length len.
  54  * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
  55  * are treated for the hash.
  56  */
  57 extern unsigned long xdiff_hash_string(const char *s, size_t len, long flags);
  58
  59 #endif