diff: add option to show context between close hunks

[thirdparty/git.git] / xdiff / xdiff.h

/*
 *  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

/* merge simplification levels */
#define XDL_MERGE_MINIMAL 0
#define XDL_MERGE_EAGER 1
#define XDL_MERGE_ZEALOUS 2
#define XDL_MERGE_ZEALOUS_ALNUM 3
#define XDL_MERGE_LEVEL_MASK 0x0f

/* merge output styles */
#define XDL_MERGE_DIFF3 0x8000
#define XDL_MERGE_STYLE_MASK 0x8000

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;
	long interhunkctxlen;
	unsigned long flags;
	find_func_t find_func;
	void *find_func_priv;
	void (*emit_func)();
} 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) */