types.h

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
/* Define if you want CGRAPH */
#define WITH_CGRAPH 1
 
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <assert.h>
#include <signal.h>
#include "geom.h"
#include "gvcext.h"
#include "pathgeom.h"
#include "textspan.h"
#include "cgraph.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
    typedef struct Agraph_s graph_t;
    typedef struct Agnode_s node_t;
    typedef struct Agedge_s edge_t;
    typedef struct Agsym_s attrsym_t;
#define TAIL_ID "tailport"
#define HEAD_ID "headport"
 
    typedef struct htmllabel_t htmllabel_t;
 
    typedef struct port {       /* internal edge endpoint specification */
        pointf p;               /* aiming point relative to node center */
        double theta;           /* slope in radians */
        boxf *bp;               /* if not null, points to bbox of
                                 * rectangular area that is port target
                                 */
        bool defined;        /* if true, edge has port info at this end */
        bool constrained;    /* if true, constraints such as theta are set */
        bool clip;           /* if true, clip end to node/port shape */
        bool dyna;           /* if true, assign compass point dynamically */
        unsigned char order;    /* for mincross */
        unsigned char side;     /* if port is on perimeter of node, this
                                 * contains the bitwise OR of the sides (TOP,
                                 * BOTTOM, etc.) it is on.
                                 */
        char *name;             /* port name, if it was explicitly given, otherwise NULL */
    } port;
 
    typedef struct {
        bool(*swapEnds) (edge_t * e);   /* Should head and tail be swapped? */
        bool(*splineMerge) (node_t * n);        /* Is n a node in the middle of an edge? */
        bool ignoreSwap;                     /* Test for swapped edges if false */
        bool isOrtho;                        /* Orthogonal routing used */
    } splineInfo;
 
    typedef struct pathend_t {
        boxf nb;                        /* the node box */
        pointf np;              /* node port */
        int sidemask;
        int boxn;
        boxf boxes[20];
    } pathend_t;
 
    typedef struct path {       /* internal specification for an edge spline */
        port start;
        port end;
        size_t nbox; 
        boxf *boxes;            /* rectangular regions of subdivision */
        void *data;
    } path;
 
    typedef struct bezier {
        pointf *list;
        size_t size;
        uint32_t sflag;
        uint32_t eflag;
        pointf sp;
        pointf ep;
    } bezier;
 
    typedef struct splines {
        bezier *list;
        size_t size;
        boxf bb;
    } splines;
 
    typedef struct textlabel_t {
        char *text;
        char *fontname;
        char *fontcolor;
        int charset;
        double fontsize;
        pointf dimen; /* the diagonal size of the label (estimated by layout) */
        pointf space; /* the diagonal size of the space for the label */
                      /*   the rendered label is aligned in this box */
                      /*   space does not include pad or margin */
        pointf pos;   /* the center of the space for the label */
        union {
            struct {
                textspan_t *span;
                size_t nspans;
            } txt;
            htmllabel_t *html;
        } u;
        char valign;  /* 't' 'c' 'b' */
        bool set;  /* true if position is set */
        bool html; /* true if html label */
    } textlabel_t;
 
    typedef struct {
        bool filled: 1;
        bool radial: 1;
        bool rounded: 1;
        bool diagonals: 1;
        bool auxlabels: 1;
        bool invisible: 1;
        bool striped: 1;
        bool dotted: 1;
        bool dashed: 1;
        bool wedged: 1;
        bool underline: 1;
        bool fixedshape: 1;
        unsigned shape: 7;
    } graphviz_polygon_style_t;
 
    typedef struct polygon_t {  /* mutable shape information for a node */
        int regular;            /* true for symmetric shapes */
        size_t peripheries; 
        size_t sides; 
        double orientation;     /* orientation of shape (+ve degrees) */
        double distortion;      /* distortion factor - as in trapezium */
        double skew;            /* skew factor - as in parallelogram */
        graphviz_polygon_style_t option; 
        pointf *vertices;       /* array of vertex points */
    } polygon_t;
 
typedef union inside_t {
  struct {
    pointf *p;
    double *r;
  } a;
  struct {
    node_t *n;
    boxf *bp;
    node_t *lastn;        
    double radius;        
    polygon_t *last_poly; 
    size_t last;          
    size_t outp;          
    double scalex, scaley, box_URx, box_URy;
  } s;
} inside_t;
 
    typedef struct stroke_t {   /* information about a single stroke */
        /* we would have called it a path if that term wasn't already used */
        size_t nvertices; 
        pointf *vertices;       /* array of vertex points */
    } stroke_t;
 
    typedef struct shape_functions {    /* read-only shape functions */
        void (*initfn) (node_t *);      /* initializes shape from node u.shape_info structure */
        void (*freefn) (node_t *);      /* frees  shape from node u.shape_info structure */
         port(*portfn) (node_t *, char *, char *);      /* finds aiming point and slope of port */
         bool(*insidefn) (inside_t * inside_context, pointf);   /* clips incident gvc->e spline on shape of gvc->n */
        int (*pboxfn)(node_t* n, port* p, int side, boxf rv[], int *kptr); /* finds box path to reach port */
        void (*codefn) (GVJ_t * job, node_t * n);       /* emits graphics code for node */
    } shape_functions;
 
    typedef enum { SH_UNSET, SH_POLY, SH_RECORD, SH_POINT, SH_EPSF} shape_kind;
 
    typedef struct shape_desc { /* read-only shape descriptor */
        char *name;             /* as read from graph file */
        shape_functions *fns;
        polygon_t *polygon;     /* base polygon info */
        bool usershape;
    } shape_desc;
 
#include "usershape.h"          /* usershapes needed by gvc */
 
    typedef struct adjmatrix_t adjmatrix_t;
 
    typedef struct rank_t {
        int n;                  /* number of nodes in this rank  */
        node_t **v;             /* ordered list of nodes in rank    */
        int an;                 /* globally allocated number of nodes   */
        node_t **av;            /* allocated list of nodes in rank  */
        double ht1;     /* height below/above centerline    */
        double ht2;     /* height below/above centerline    */
        double pht1;    /* as above, but only primitive nodes   */
        double pht2;    /* as above, but only primitive nodes   */
        bool candidate; /* for transpose () */
        bool valid;
        int cache_nc;           /* caches number of crossings */
        adjmatrix_t *flat;
    } rank_t;
 
    typedef enum { R_NONE =
            0, R_VALUE, R_FILL, R_COMPRESS, R_AUTO, R_EXPAND } ratio_t;
 
    typedef struct layout_t {
        double quantum;
        double scale;
        double ratio;           /* set only if ratio_kind == R_VALUE */
        double dpi;
        pointf margin;
        pointf page;
        pointf size;
        bool filled;
        bool landscape;
        bool centered;
        ratio_t ratio_kind;
        void* xdots;
        char* id;
    } layout_t;
 
/* for "record" shapes */
    typedef struct field_t {
        pointf size;            /* its dimension */
        boxf b;                 /* its placement in node's coordinates */
        int n_flds;
        textlabel_t *lp;        /* n_flds == 0 */
        struct field_t **fld;   /* n_flds > 0 */
        char *id;               /* user's identifier */
        unsigned char LR;       /* if box list is horizontal (left to right) */
        unsigned char sides;    /* sides of node exposed to field */
    } field_t;
 
    typedef struct nlist_t {
        node_t **list;
        size_t size;
    } nlist_t;
 
    typedef struct elist {
        edge_t **list;
        size_t size;
    } elist;
 
#define GUI_STATE_ACTIVE    (1<<0)
#define GUI_STATE_SELECTED  (1<<1)
#define GUI_STATE_VISITED   (1<<2)
#define GUI_STATE_DELETED   (1<<3)
 
#define elist_append(item, L)                                                  \
  do {                                                                         \
    L.list = gv_recalloc(L.list, L.size + 1, L.size + 2, sizeof(edge_t *));    \
    L.list[L.size++] = item;                                                   \
    L.list[L.size] = NULL;                                                     \
  } while (0)
#define alloc_elist(n, L)                                                      \
  do {                                                                         \
    L.size = 0;                                                                \
    L.list = gv_calloc(n + 1, sizeof(edge_t *));                               \
  } while (0)
#define free_list(L)          free(L.list)
 
typedef enum {NATIVEFONTS,PSFONTS,SVGFONTS} fontname_kind;
 
    typedef struct Agraphinfo_t {
        Agrec_t hdr;
        /* to generate code */
        layout_t *drawing;
        textlabel_t *label;     /* if the cluster has a title */
        boxf bb;                        /* bounding box */
        pointf border[4];       /* sizes of margins for graph labels */
        unsigned char gui_state; /* Graph state for GUI ops */
        unsigned char has_labels;
        bool has_images;
        unsigned char charset; /* input character set */
        int rankdir;
        double ht1; /* below and above extremal ranks */
        double ht2; /* below and above extremal ranks */
        unsigned short flags;
        void *alg;
        GVC_t *gvc;     /* context for "globals" over multiple graphs */
        void (*cleanup) (graph_t * g);   /* function to deallocate layout-specific data */
 
#ifndef DOT_ONLY
        /* to place nodes */
        node_t **neato_nlist;
        int move;
        double **dist;
        double **spring;
        double **sum_t;
        double ***t;
        unsigned short ndim;
        unsigned short odim;
#endif
#ifndef NEATO_ONLY
        /* to have subgraphs */
        int n_cluster;
        graph_t **clust;        /* clusters are in clust[1..n_cluster] !!! */
        graph_t *dotroot;
        node_t *nlist;
        rank_t *rank;
        graph_t *parent;        /* containing cluster (not parent subgraph) */
        int level;              /* cluster nesting level (not node level!) */
        node_t *minrep; /* set leaders for min and max rank */
        node_t *maxrep; /* set leaders for min and max rank */
 
        /* fast graph node list */
        nlist_t comp;
        /* connected components */
        node_t *minset; /* set leaders */
        node_t *maxset; /* set leaders */
        /* includes virtual */
        int minrank;
        int maxrank;
 
        /* various flags */
        bool has_flat_edges;
        unsigned char   showboxes;
        fontname_kind fontnames;                /* to override mangling in SVG */
 
        int nodesep;
        int ranksep;
        node_t *ln; /* left nodes of bounding box */
        node_t *rn; /* right nodes of bounding box */
 
        /* for clusters */
        node_t *leader;
        node_t **rankleader;
        bool expanded;
        char installed;
        char set_type;
        char label_pos;
        bool exact_ranksep;
#endif
 
    } Agraphinfo_t;
 
#define GD_parent(g) (((Agraphinfo_t*)AGDATA(g))->parent)
#define GD_level(g) (((Agraphinfo_t*)AGDATA(g))->level)
#define GD_drawing(g) (((Agraphinfo_t*)AGDATA(g))->drawing)
#define GD_bb(g) (((Agraphinfo_t*)AGDATA(g))->bb)
#define GD_gvc(g) (((Agraphinfo_t*)AGDATA(g))->gvc)
#define GD_cleanup(g) (((Agraphinfo_t*)AGDATA(g))->cleanup)
#define GD_dist(g) (((Agraphinfo_t*)AGDATA(g))->dist)
#define GD_alg(g) (((Agraphinfo_t*)AGDATA(g))->alg)
#define GD_border(g) (((Agraphinfo_t*)AGDATA(g))->border)
#define GD_clust(g) (((Agraphinfo_t*)AGDATA(g))->clust)
#define GD_dotroot(g) (((Agraphinfo_t*)AGDATA(g))->dotroot)
#define GD_comp(g) (((Agraphinfo_t*)AGDATA(g))->comp)
#define GD_exact_ranksep(g) (((Agraphinfo_t*)AGDATA(g))->exact_ranksep)
#define GD_expanded(g) (((Agraphinfo_t*)AGDATA(g))->expanded)
#define GD_flags(g) (((Agraphinfo_t*)AGDATA(g))->flags)
#define GD_gui_state(g) (((Agraphinfo_t*)AGDATA(g))->gui_state)
#define GD_charset(g) (((Agraphinfo_t*)AGDATA(g))->charset)
#define GD_has_labels(g) (((Agraphinfo_t*)AGDATA(g))->has_labels)
#define GD_has_images(g) (((Agraphinfo_t*)AGDATA(g))->has_images)
#define GD_has_flat_edges(g) (((Agraphinfo_t*)AGDATA(g))->has_flat_edges)
#define GD_ht1(g) (((Agraphinfo_t*)AGDATA(g))->ht1)
#define GD_ht2(g) (((Agraphinfo_t*)AGDATA(g))->ht2)
#define GD_installed(g) (((Agraphinfo_t*)AGDATA(g))->installed)
#define GD_label(g) (((Agraphinfo_t*)AGDATA(g))->label)
#define GD_leader(g) (((Agraphinfo_t*)AGDATA(g))->leader)
#define GD_rankdir2(g) (((Agraphinfo_t*)AGDATA(g))->rankdir)
#define GD_rankdir(g) (((Agraphinfo_t*)AGDATA(g))->rankdir & 0x3)
#define GD_flip(g) (GD_rankdir(g) & 1)
#define GD_realrankdir(g) ((((Agraphinfo_t*)AGDATA(g))->rankdir) >> 2)
#define GD_realflip(g) (GD_realrankdir(g) & 1)
#define GD_ln(g) (((Agraphinfo_t*)AGDATA(g))->ln)
#define GD_maxrank(g) (((Agraphinfo_t*)AGDATA(g))->maxrank)
#define GD_maxset(g) (((Agraphinfo_t*)AGDATA(g))->maxset)
#define GD_minrank(g) (((Agraphinfo_t*)AGDATA(g))->minrank)
#define GD_minset(g) (((Agraphinfo_t*)AGDATA(g))->minset)
#define GD_minrep(g) (((Agraphinfo_t*)AGDATA(g))->minrep)
#define GD_maxrep(g) (((Agraphinfo_t*)AGDATA(g))->maxrep)
#define GD_move(g) (((Agraphinfo_t*)AGDATA(g))->move)
#define GD_n_cluster(g) (((Agraphinfo_t*)AGDATA(g))->n_cluster)
#define GD_ndim(g) (((Agraphinfo_t*)AGDATA(g))->ndim)
#define GD_odim(g) (((Agraphinfo_t*)AGDATA(g))->odim)
#define GD_neato_nlist(g) (((Agraphinfo_t*)AGDATA(g))->neato_nlist)
#define GD_nlist(g) (((Agraphinfo_t*)AGDATA(g))->nlist)
#define GD_nodesep(g) (((Agraphinfo_t*)AGDATA(g))->nodesep)
#define GD_rank(g) (((Agraphinfo_t*)AGDATA(g))->rank)
#define GD_rankleader(g) (((Agraphinfo_t*)AGDATA(g))->rankleader)
#define GD_ranksep(g) (((Agraphinfo_t*)AGDATA(g))->ranksep)
#define GD_rn(g) (((Agraphinfo_t*)AGDATA(g))->rn)
#define GD_set_type(g) (((Agraphinfo_t*)AGDATA(g))->set_type)
#define GD_label_pos(g) (((Agraphinfo_t*)AGDATA(g))->label_pos)
#define GD_showboxes(g) (((Agraphinfo_t*)AGDATA(g))->showboxes)
#define GD_fontnames(g) (((Agraphinfo_t*)AGDATA(g))->fontnames)
#define GD_spring(g) (((Agraphinfo_t*)AGDATA(g))->spring)
#define GD_sum_t(g) (((Agraphinfo_t*)AGDATA(g))->sum_t)
#define GD_t(g) (((Agraphinfo_t*)AGDATA(g))->t)
 
    typedef struct Agnodeinfo_t {
        Agrec_t hdr;
        shape_desc *shape;
        void *shape_info;
        pointf coord;
        double width;   /* inches */
        double height;  /* inches */
        boxf bb;
        double ht;
        double lw;
        double rw;
        double outline_width;  /* width in points with penwidth taken into account */
        double outline_height; /* height in points with penwidth taken into account */
        textlabel_t *label;
        textlabel_t *xlabel;
        void *alg;
        char state;
        unsigned char gui_state; /* Node state for GUI ops */
        bool clustnode;
 
#ifndef DOT_ONLY
        unsigned char pinned;
        int id;
        int heapindex;
        int hops;
        double *pos;
        double dist;
#endif
#ifndef NEATO_ONLY
        unsigned char showboxes;
        bool  has_port;
        node_t* rep;
        node_t *set;
 
        /* fast graph */
        char node_type;
        size_t mark;
        char onstack;
        char ranktype;
        char weight_class;
        node_t *next;
        node_t *prev;
        elist in;
        elist out;
        elist flat_out;
        elist flat_in;
        elist other;
        graph_t *clust;
 
        /* for union-find and collapsing nodes */
        int UF_size;
        node_t *UF_parent;
 
        /* for placing nodes */
        int rank;
        int order;      /* initially, order = 1 for ordered edges */
        double mval;
        elist save_in;
        elist save_out;
 
        /* for network-simplex */
        elist tree_in;
        elist tree_out;
        edge_t *par;
        int low;
        int lim;
        int priority;
 
        double pad[1];
#endif
 
    } Agnodeinfo_t;
 
#define ND_id(n) (((Agnodeinfo_t*)AGDATA(n))->id)
#define ND_alg(n) (((Agnodeinfo_t*)AGDATA(n))->alg)
#define ND_UF_parent(n) (((Agnodeinfo_t*)AGDATA(n))->UF_parent)
#define ND_set(n) (((Agnodeinfo_t*)AGDATA(n))->set)
#define ND_UF_size(n) (((Agnodeinfo_t*)AGDATA(n))->UF_size)
#define ND_bb(n) (((Agnodeinfo_t*)AGDATA(n))->bb)
#define ND_clust(n) (((Agnodeinfo_t*)AGDATA(n))->clust)
#define ND_coord(n) (((Agnodeinfo_t*)AGDATA(n))->coord)
#define ND_dist(n) (((Agnodeinfo_t*)AGDATA(n))->dist)
#define ND_flat_in(n) (((Agnodeinfo_t*)AGDATA(n))->flat_in)
#define ND_flat_out(n) (((Agnodeinfo_t*)AGDATA(n))->flat_out)
#define ND_gui_state(n) (((Agnodeinfo_t*)AGDATA(n))->gui_state)
#define ND_has_port(n) (((Agnodeinfo_t*)AGDATA(n))->has_port)
#define ND_rep(n) (((Agnodeinfo_t*)AGDATA(n))->rep)
#define ND_heapindex(n) (((Agnodeinfo_t*)AGDATA(n))->heapindex)
#define ND_height(n) (((Agnodeinfo_t*)AGDATA(n))->height)
#define ND_hops(n) (((Agnodeinfo_t*)AGDATA(n))->hops)
#define ND_ht(n) (((Agnodeinfo_t*)AGDATA(n))->ht)
#define ND_in(n) (((Agnodeinfo_t*)AGDATA(n))->in)
#define ND_label(n) (((Agnodeinfo_t*)AGDATA(n))->label)
#define ND_xlabel(n) (((Agnodeinfo_t*)AGDATA(n))->xlabel)
#define ND_lim(n) (((Agnodeinfo_t*)AGDATA(n))->lim)
#define ND_low(n) (((Agnodeinfo_t*)AGDATA(n))->low)
#define ND_lw(n) (((Agnodeinfo_t*)AGDATA(n))->lw)
#define ND_mark(n) (((Agnodeinfo_t*)AGDATA(n))->mark)
#define ND_mval(n) (((Agnodeinfo_t*)AGDATA(n))->mval)
#define ND_n_cluster(n) (((Agnodeinfo_t*)AGDATA(n))->n_cluster)
#define ND_next(n) (((Agnodeinfo_t*)AGDATA(n))->next)
#define ND_node_type(n) (((Agnodeinfo_t*)AGDATA(n))->node_type)
#define ND_onstack(n) (((Agnodeinfo_t*)AGDATA(n))->onstack)
#define ND_order(n) (((Agnodeinfo_t*)AGDATA(n))->order)
#define ND_other(n) (((Agnodeinfo_t*)AGDATA(n))->other)
#define ND_out(n) (((Agnodeinfo_t*)AGDATA(n))->out)
#define ND_outline_width(n) (((Agnodeinfo_t*)AGDATA(n))->outline_width)
#define ND_outline_height(n) (((Agnodeinfo_t*)AGDATA(n))->outline_height)
#define ND_par(n) (((Agnodeinfo_t*)AGDATA(n))->par)
#define ND_pinned(n) (((Agnodeinfo_t*)AGDATA(n))->pinned)
#define ND_pos(n) (((Agnodeinfo_t*)AGDATA(n))->pos)
#define ND_prev(n) (((Agnodeinfo_t*)AGDATA(n))->prev)
#define ND_priority(n) (((Agnodeinfo_t*)AGDATA(n))->priority)
#define ND_rank(n) (((Agnodeinfo_t*)AGDATA(n))->rank)
#define ND_ranktype(n) (((Agnodeinfo_t*)AGDATA(n))->ranktype)
#define ND_rw(n) (((Agnodeinfo_t*)AGDATA(n))->rw)
#define ND_save_in(n) (((Agnodeinfo_t*)AGDATA(n))->save_in)
#define ND_save_out(n) (((Agnodeinfo_t*)AGDATA(n))->save_out)
#define ND_shape(n) (((Agnodeinfo_t*)AGDATA(n))->shape)
#define ND_shape_info(n) (((Agnodeinfo_t*)AGDATA(n))->shape_info)
#define ND_showboxes(n) (((Agnodeinfo_t*)AGDATA(n))->showboxes)
#define ND_state(n) (((Agnodeinfo_t*)AGDATA(n))->state)
#define ND_clustnode(n) (((Agnodeinfo_t*)AGDATA(n))->clustnode)
#define ND_tree_in(n) (((Agnodeinfo_t*)AGDATA(n))->tree_in)
#define ND_tree_out(n) (((Agnodeinfo_t*)AGDATA(n))->tree_out)
#define ND_weight_class(n) (((Agnodeinfo_t*)AGDATA(n))->weight_class)
#define ND_width(n) (((Agnodeinfo_t*)AGDATA(n))->width)
#define ND_xsize(n) (ND_lw(n)+ND_rw(n))
#define ND_ysize(n) (ND_ht(n))
 
    typedef struct Agedgeinfo_t {
        Agrec_t hdr;
        splines *spl;
        port tail_port;
        port head_port;
        textlabel_t *label;
        textlabel_t *head_label;
        textlabel_t *tail_label;
        textlabel_t *xlabel;
        char edge_type;
        char compound;
        char adjacent;          /* true for flat edge with adjacent nodes */
        char label_ontop;
        unsigned char gui_state; /* Edge state for GUI ops */
        edge_t *to_orig;        /* for dot's shapes.c    */
        void *alg;
 
#ifndef DOT_ONLY
        double factor;
        double dist;
        Ppolyline_t path;
#endif
#ifndef NEATO_ONLY
        unsigned char showboxes;
        bool conc_opp_flag;
        short xpenalty;
        int weight;
        int cutvalue;
        int tree_index;
        short count;
        int minlen;
        edge_t *to_virt;
#endif
    } Agedgeinfo_t;
 
#define ED_alg(e) (((Agedgeinfo_t*)AGDATA(e))->alg)
#define ED_conc_opp_flag(e) (((Agedgeinfo_t*)AGDATA(e))->conc_opp_flag)
#define ED_count(e) (((Agedgeinfo_t*)AGDATA(e))->count)
#define ED_cutvalue(e) (((Agedgeinfo_t*)AGDATA(e))->cutvalue)
#define ED_edge_type(e) (((Agedgeinfo_t*)AGDATA(e))->edge_type)
#define ED_compound(e) (((Agedgeinfo_t*)AGDATA(e))->compound)
#define ED_adjacent(e) (((Agedgeinfo_t*)AGDATA(e))->adjacent)
#define ED_factor(e) (((Agedgeinfo_t*)AGDATA(e))->factor)
#define ED_gui_state(e) (((Agedgeinfo_t*)AGDATA(e))->gui_state)
#define ED_head_label(e) (((Agedgeinfo_t*)AGDATA(e))->head_label)
#define ED_head_port(e) (((Agedgeinfo_t*)AGDATA(e))->head_port)
#define ED_label(e) (((Agedgeinfo_t*)AGDATA(e))->label)
#define ED_xlabel(e) (((Agedgeinfo_t*)AGDATA(e))->xlabel)
#define ED_label_ontop(e) (((Agedgeinfo_t*)AGDATA(e))->label_ontop)
#define ED_minlen(e) (((Agedgeinfo_t*)AGDATA(e))->minlen)
#define ED_path(e) (((Agedgeinfo_t*)AGDATA(e))->path)
#define ED_showboxes(e) (((Agedgeinfo_t*)AGDATA(e))->showboxes)
#define ED_spl(e) (((Agedgeinfo_t*)AGDATA(e))->spl)
#define ED_tail_label(e) (((Agedgeinfo_t*)AGDATA(e))->tail_label)
#define ED_tail_port(e) (((Agedgeinfo_t*)AGDATA(e))->tail_port)
#define ED_to_orig(e) (((Agedgeinfo_t*)AGDATA(e))->to_orig)
#define ED_to_virt(e) (((Agedgeinfo_t*)AGDATA(e))->to_virt)
#define ED_tree_index(e) (((Agedgeinfo_t*)AGDATA(e))->tree_index)
#define ED_xpenalty(e) (((Agedgeinfo_t*)AGDATA(e))->xpenalty)
#define ED_dist(e) (((Agedgeinfo_t*)AGDATA(e))->dist)
#define ED_weight(e) (((Agedgeinfo_t*)AGDATA(e))->weight)
 
#define ag_xget(x,a) agxget(x,a)
#define SET_RANKDIR(g,rd) (GD_rankdir2(g) = rd)
#define agfindedge(g,t,h) (agedge(g,t,h,NULL,0))
#define agfindnode(g,n) (agnode(g,n,0))
#define agfindgraphattr(g,a) (agattr(g,AGRAPH,a,NULL))
#define agfindnodeattr(g,a) (agattr(g,AGNODE,a,NULL))
#define agfindedgeattr(g,a) (agattr(g,AGEDGE,a,NULL))
 
    typedef struct {
        int flags;
    } gvlayout_features_t;
 
#ifdef __cplusplus
}
#endif