/usr/include/graphviz/pack.h is in libgraphviz-dev 2.26.3-10ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#ifndef _PACK_H
#define _PACK_H 1
#ifdef __cplusplus
extern "C" {
#endif
#include "types.h"
/* Type indicating granularity and method
* l_undef - unspecified
* l_node - polyomino using nodes and edges
* l_clust - polyomino using nodes and edges and top-level clusters
* (assumes ND_clust(n) unused by application)
* l_graph - polyomino using computer graph bounding box
* l_array - array based on graph bounding boxes
* l_aspect - tiling based on graph bounding boxes preserving aspect ratio
* l_hull - polyomino using convex hull (unimplemented)
* l_tile - tiling using graph bounding box (unimplemented)
* l_bisect - alternate bisection using graph bounding box (unimplemented)
*/
typedef enum { l_undef, l_clust, l_node, l_graph, l_array, l_aspect } pack_mode;
#define PK_COL_MAJOR 1
#define PK_USER_VALS 2
typedef unsigned char packval_t;
typedef struct {
float aspect; /* desired aspect ratio */
int sz; /* row/column size size */
unsigned int margin; /* margin left around objects, in points */
int doSplines; /* use splines in constructing graph shape */
pack_mode mode; /* granularity and method */
boolean *fixed; /* fixed[i] == true implies g[i] should not be moved */
packval_t* vals; /* for arrays, sort numbers */
int flags;
} pack_info;
#ifdef GVDLL
#define extern __declspec(dllexport)
#else
#define extern
#endif
/*visual studio*/
#ifdef WIN32_DLL
#ifndef GVC_EXPORTS
#define extern __declspec(dllimport)
#endif
#endif
/*end visual studio*/
extern point *putRects(int ng, boxf* bbs, pack_info* pinfo);
extern int packRects(int ng, boxf* bbs, pack_info* pinfo);
extern point *putGraphs(int, Agraph_t **, Agraph_t *, pack_info *);
extern int packGraphs(int, Agraph_t **, Agraph_t *, pack_info *);
extern int packSubgraphs(int, Agraph_t **, Agraph_t *, pack_info *);
extern int pack_graph(int ng, Agraph_t** gs, Agraph_t* root, boolean* fixed);
extern int shiftGraphs(int, Agraph_t**, point*, Agraph_t*, int);
extern pack_mode getPackMode(Agraph_t * g, pack_mode dflt);
extern int getPack(Agraph_t *, int not_def, int dflt);
extern pack_mode getPackInfo(Agraph_t * g, pack_mode dflt, int dfltMargin, pack_info*);
extern pack_mode getPackModeInfo(Agraph_t * g, pack_mode dflt, pack_info*);
extern pack_mode parsePackModeInfo(char* p, pack_mode dflt, pack_info* pinfo);
extern int isConnected(Agraph_t *);
extern Agraph_t **ccomps(Agraph_t *, int *, char *);
extern Agraph_t **pccomps(Agraph_t *, int *, char *, boolean *);
extern int nodeInduce(Agraph_t *);
#undef extern
#ifdef __cplusplus
}
#endif
#endif
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