git/xdiff/xdiff.h
Johannes Schindelin ee95ec5d58 xdl_merge(): introduce XDL_MERGE_ZEALOUS_ALNUM
When a merge conflicts, there are often common lines that are not really
common, such as empty lines or lines containing a single curly bracket.

With XDL_MERGE_ZEALOUS_ALNUM, we use the following heuristics: when a
hunk does not contain any letters or digits, it is treated as conflicting.

In other words, a conflict which used to look like this:

	<<<<<<<
					a = 1;
	=======
					output();
	>>>>>>>
				}
			}
		}

	<<<<<<<
		output();
	=======
		b = 1;
	>>>>>>>

will look like this with ZEALOUS_ALNUM:

	<<<<<<<
					a = 1;
				}
			}
		}

		output();
	=======
					output();
				}
			}
		}

		b = 1;
	>>>>>>>

To demonstrate this, git-merge-file has been switched from
XDL_MERGE_ZEALOUS to XDL_MERGE_ZEALOUS_ALNUM.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-18 00:10:37 -08:00

111 lines
2.9 KiB
C

/*
* LibXDiff by Davide Libenzi ( File Differential Library )
* Copyright (C) 2003 Davide Libenzi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Davide Libenzi <davidel@xmailserver.org>
*
*/
#if !defined(XDIFF_H)
#define XDIFF_H
#ifdef __cplusplus
extern "C" {
#endif /* #ifdef __cplusplus */
#define XDF_NEED_MINIMAL (1 << 1)
#define XDF_IGNORE_WHITESPACE (1 << 2)
#define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
#define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4)
#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
#define XDL_PATCH_NORMAL '-'
#define XDL_PATCH_REVERSE '+'
#define XDL_PATCH_MODEMASK ((1 << 8) - 1)
#define XDL_PATCH_IGNOREBSPACE (1 << 8)
#define XDL_EMIT_FUNCNAMES (1 << 0)
#define XDL_EMIT_COMMON (1 << 1)
#define XDL_MMB_READONLY (1 << 0)
#define XDL_MMF_ATOMIC (1 << 0)
#define XDL_BDOP_INS 1
#define XDL_BDOP_CPY 2
#define XDL_BDOP_INSB 3
#define XDL_MERGE_MINIMAL 0
#define XDL_MERGE_EAGER 1
#define XDL_MERGE_ZEALOUS 2
#define XDL_MERGE_ZEALOUS_ALNUM 3
typedef struct s_mmfile {
char *ptr;
long size;
} mmfile_t;
typedef struct s_mmbuffer {
char *ptr;
long size;
} mmbuffer_t;
typedef struct s_xpparam {
unsigned long flags;
} xpparam_t;
typedef struct s_xdemitcb {
void *priv;
int (*outf)(void *, mmbuffer_t *, int);
} xdemitcb_t;
typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long buffer_size, void *priv);
typedef struct s_xdemitconf {
long ctxlen;
unsigned long flags;
find_func_t find_func;
void *find_func_priv;
} xdemitconf_t;
typedef struct s_bdiffparam {
long bsize;
} bdiffparam_t;
#define xdl_malloc(x) malloc(x)
#define xdl_free(ptr) free(ptr)
#define xdl_realloc(ptr,x) realloc(ptr,x)
void *xdl_mmfile_first(mmfile_t *mmf, long *size);
void *xdl_mmfile_next(mmfile_t *mmf, long *size);
long xdl_mmfile_size(mmfile_t *mmf);
int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
xdemitconf_t const *xecfg, xdemitcb_t *ecb);
int xdl_merge(mmfile_t *orig, mmfile_t *mf1, const char *name1,
mmfile_t *mf2, const char *name2,
xpparam_t const *xpp, int level, mmbuffer_t *result);
#ifdef __cplusplus
}
#endif /* #ifdef __cplusplus */
#endif /* #if !defined(XDIFF_H) */