/usr/include/graphviz/xdot.h is in libgraphviz-dev 2.36.0-0ubuntu3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors: See CVS logs. Details at http://www.graphviz.org/
*************************************************************************/
#ifndef XDOT_H
#define XDOT_H
#include <stdio.h>
#ifdef _WIN32
#include <windows.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define INITIAL_XDOT_CAPACITY 512
typedef enum {
xd_none,
xd_linear,
xd_radial
} xdot_grad_type;
typedef struct {
float frac;
char* color;
} xdot_color_stop;
typedef struct {
double x0, y0;
double x1, y1;
int n_stops;
xdot_color_stop* stops;
} xdot_linear_grad;
typedef struct {
double x0, y0, r0;
double x1, y1, r1;
int n_stops;
xdot_color_stop* stops;
} xdot_radial_grad;
typedef struct {
xdot_grad_type type;
union {
char* clr;
xdot_linear_grad ling;
xdot_radial_grad ring;
} u;
} xdot_color;
typedef enum {
xd_left, xd_center, xd_right
} xdot_align;
typedef struct {
double x, y, z;
} xdot_point;
typedef struct {
double x, y, w, h;
} xdot_rect;
typedef struct {
int cnt;
xdot_point* pts;
} xdot_polyline;
typedef struct {
double x, y;
xdot_align align;
double width;
char* text;
} xdot_text;
typedef struct {
xdot_rect pos;
char* name;
} xdot_image;
typedef struct {
double size;
char* name;
} xdot_font;
typedef enum {
xd_filled_ellipse, xd_unfilled_ellipse,
xd_filled_polygon, xd_unfilled_polygon,
xd_filled_bezier, xd_unfilled_bezier,
xd_polyline, xd_text,
xd_fill_color, xd_pen_color, xd_font, xd_style, xd_image,
xd_grad_fill_color, xd_grad_pen_color,
xd_fontchar
} xdot_kind;
typedef enum {
xop_ellipse,
xop_polygon,
xop_bezier,
xop_polyline, xop_text,
xop_fill_color, xop_pen_color, xop_font, xop_style, xop_image,
xop_grad_color,
xop_fontchar
} xop_kind;
typedef struct _xdot_op xdot_op;
typedef void (*drawfunc_t)(xdot_op*, int);
typedef void (*freefunc_t)(xdot_op*);
struct _xdot_op {
xdot_kind kind;
union {
xdot_rect ellipse; /* xd_filled_ellipse, xd_unfilled_ellipse */
xdot_polyline polygon; /* xd_filled_polygon, xd_unfilled_polygon */
xdot_polyline polyline; /* xd_polyline */
xdot_polyline bezier; /* xd_filled_bezier, xd_unfilled_bezier */
xdot_text text; /* xd_text */
xdot_image image; /* xd_image */
char* color; /* xd_fill_color, xd_pen_color */
xdot_color grad_color; /* xd_grad_fill_color, xd_grad_pen_color */
xdot_font font; /* xd_font */
char* style; /* xd_style */
int fontchar; /* xd_fontchar */
} u;
drawfunc_t drawfunc;
};
#define XDOT_PARSE_ERROR 1
typedef struct {
int cnt; /* no. of xdot ops */
int sz; /* sizeof structure containing xdot_op as first field */
xdot_op* ops;
freefunc_t freefunc;
int flags;
} xdot;
typedef struct {
int cnt; /* no. of xdot ops */
int n_ellipse;
int n_polygon;
int n_polygon_pts;
int n_polyline;
int n_polyline_pts;
int n_bezier;
int n_bezier_pts;
int n_text;
int n_font;
int n_style;
int n_color;
int n_image;
int n_gradcolor;
int n_fontchar;
} xdot_stats;
/* ops are indexed by xop_kind */
extern xdot* parseXDotF (char*, drawfunc_t opfns[], int sz);
extern xdot* parseXDotFOn (char*, drawfunc_t opfns[], int sz, xdot*);
extern xdot* parseXDot (char*);
extern char* sprintXDot (xdot*);
extern void fprintXDot (FILE*, xdot*);
extern void jsonXDot (FILE*, xdot*);
extern void freeXDot (xdot*);
extern int statXDot (xdot*, xdot_stats*);
extern xdot_grad_type colorTypeXDot (char*);
extern char* parseXDotColor (char* cp, xdot_color* clr);
extern void freeXDotColor (xdot_color*);
#ifdef __cplusplus
}
#endif
#endif
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