/usr/include/graphviz/xdot.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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/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2007 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 XDOT_H
#define XDOT_H
#include <stdio.h>
#ifdef _WIN32
#include <windows.h>
#endif
#define INITIAL_XDOT_CAPACITY 512
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
} 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_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_font font; /* xd_font */
char* style; /* xd_style */
} u;
drawfunc_t drawfunc;
};
#define XDOT_PARSE_ERROR 1
typedef struct {
int cnt;
int sz;
xdot_op* ops;
freefunc_t freefunc;
int flags;
} xdot;
/* 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 freeXDot (xdot*);
#endif
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