Graphviz: lib/cgraph/write.c File Reference

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implements agwrite, agstrcanon, and agcanonStr More...

#include "config.h"
#include <assert.h>
#include <cgraph/agstrcanon.h>
#include <cgraph/cghdr.h>
#include <ctype.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <util/gv_ctype.h>
#include <util/strcasecmp.h>

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Data Structures
struct	info_t

Macros
#define	EMPTY(s) (((s) == 0) \|\| (s)[0] == '\0')

#define	MAX_OUTPUTLINE 128

#define	MIN_OUTPUTLINE 60

Typedefs
typedef void	iochan_t

Functions
static int	ioput (Agraph_t g, iochan_t ofile, char *str)

static int	write_body (Agraph_t g, iochan_t ofile, info_t *info)

static info_t	before_write (Agraph_t *)

static void	after_write (info_t)

static int	indent (Agraph_t g, iochan_t ofile, const info_t info)

static bool	is_id_char (char c)

static bool	is_escape (const char *str)

static char *	agstrcanon_ (char arg, char buf)

static char *	agcanonhtmlstr (const char arg, char buf)

char *	agstrcanon (char arg, char buf)

static int	write_canonstr_ (Agraph_t g, iochan_t ofile, char *str, bool chk)

static int	write_canonstr (Agraph_t g, iochan_t ofile, char *str, bool known)

static int	write_dict (Agraph_t g, iochan_t ofile, char name, Dict_t dict, bool top, info_t *info)

static int	write_dicts (Agraph_t g, iochan_t ofile, bool top, info_t *info)

static int	write_hdr (Agraph_t g, iochan_t ofile, bool top, info_t *info)

static int	write_trl (Agraph_t g, iochan_t ofile, info_t *info)

static bool	is_anonymous (Agraph_t *g)

static bool	irrelevant_subgraph (Agraph_t *g)

static bool	has_no_edges (Agraph_t g, Agnode_t n)

static bool	not_default_attrs (Agraph_t g, Agnode_t n)

static int	write_subgs (Agraph_t g, iochan_t ofile, info_t *info)

static int	write_edge_name (Agedge_t e, iochan_t ofile, bool terminate, info_t *info)

static int	write_nondefault_attrs (void obj, iochan_t ofile, Dict_t defdict, info_t info)

static int	write_nodename (Agnode_t n, iochan_t ofile)

static int	attrs_written (void *obj)

static int	write_node (Agraph_t subg, Agnode_t n, iochan_t ofile, Dict_t d, info_t *info)

static bool	write_node_test (Agraph_t g, Agnode_t n, info_t *info)

static int	write_port (Agedge_t e, iochan_t ofile, Agsym_t *port)

static int	write_edge (Agedge_t e, iochan_t ofile, Dict_t d, info_t info)

static int	write_edges (iochan_t ofile, Dict_t d, info_t *info)

static void	set_attrwf (Agraph_t *g, bool toplevel, bool value)

int	agwrite (Agraph_t g, void ofile)
	Return 0 on success, EOF on failure.

static uint64_t	subgdfs (Agraph_t g, uint64_t ix, info_t info)

Variables
static int	Max_outputline = MAX_OUTPUTLINE

static Agsym_t *	Tailport

static Agsym_t *	Headport

static Agedge_t *const	EDGE_DONE = (Agedge_t *)-1
	sentinel marking an edge that has already been written out

Macro Definition Documentation

◆ EMPTY

#define EMPTY ( s ) (((s) == 0) || (s)[0] == '\0')

Definition at line 33 of file write.c.

◆ MAX_OUTPUTLINE

#define MAX_OUTPUTLINE 128

Definition at line 41 of file write.c.

◆ MIN_OUTPUTLINE

#define MIN_OUTPUTLINE 60

Definition at line 42 of file write.c.

Typedef Documentation

◆ iochan_t

typedef void iochan_t

Definition at line 35 of file write.c.

Function Documentation

◆ after_write()

static void after_write ( info_t info )

static

Definition at line 777 of file write.c.

References free().

Referenced by agwrite().

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◆ agcanonhtmlstr()

static char * agcanonhtmlstr	(	const char *	arg,
		char *	buf
	)

static

Canonicalize html strings.

Definition at line 208 of file write.c.

Referenced by agstrcanon().

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◆ agstrcanon_()

static char * agstrcanon_	(	char *	arg,
		char *	buf
	)

static

Definition at line 117 of file write.c.

References cnt(), EMPTY, gv_isalnum(), gv_isdigit(), is_escape(), is_id_char(), Max_outputline, NULL, and tok().

Referenced by agstrcanon(), and write_canonstr_().

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◆ attrs_written()

static int attrs_written ( void * obj )

static

Definition at line 557 of file write.c.

References AGATTRWF.

Referenced by write_edge(), and write_node().

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◆ before_write()

static info_t before_write ( Agraph_t * g )

static

Definition at line 764 of file write.c.

References AGEDGE, AGNODE, AGRAPH, Agraph_s::clos, gv_calloc(), Agclos_s::seq, set_attrwf(), and subgdfs().

Referenced by agwrite().

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◆ has_no_edges()

static bool has_no_edges	(	Agraph_t *	g,
		Agnode_t *	n
	)

static

Definition at line 423 of file write.c.

References agfstin(), agfstout(), and NULL.

Referenced by write_node_test().

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◆ indent()

static int indent	(	Agraph_t *	g,
		iochan_t *	ofile,
		const info_t	info
	)

static

Definition at line 63 of file write.c.

References ioput().

Referenced by write_dict(), write_edge(), write_hdr(), write_node(), write_nondefault_attrs(), and write_trl().

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◆ ioput()

static int ioput	(	Agraph_t *	g,
		iochan_t *	ofile,
		char *	str
	)

static

Definition at line 37 of file write.c.

References AGDISC, and str.

Referenced by indent(), write_canonstr_(), write_dict(), write_edge(), write_edge_name(), write_hdr(), write_node(), write_nodename(), write_nondefault_attrs(), write_port(), and write_trl().

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◆ irrelevant_subgraph()

static bool irrelevant_subgraph ( Agraph_t * g )

static

Definition at line 400 of file write.c.

References agattrrec(), agdatadict(), agparent(), agroot(), Agdatadict_s::dict, dtsize(), Agdatadict_s::e, is_anonymous(), Agdatadict_s::n, and Agattr_s::str.

Referenced by write_subgs().

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◆ is_anonymous()

static bool is_anonymous ( Agraph_t * g )

static

is this graph unnamed?

Parameters

g	Graph to inspect

Returns: True if this graph was given no explicit name

Definition at line 383 of file write.c.

References AGDISC, AGID, AgIdDisc, agnameof(), LOCALNAMEPREFIX, and NULL.

Referenced by irrelevant_subgraph().

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◆ is_escape()

static bool is_escape ( const char * str )

static

Definition at line 79 of file write.c.

References NULL, and str.

Referenced by agstrcanon_().

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◆ is_id_char()

static bool is_id_char ( char c )

static

Definition at line 73 of file write.c.

References gv_isalnum().

Referenced by agstrcanon_().

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◆ not_default_attrs()

static bool not_default_attrs	(	Agraph_t *	g,
		Agnode_t *	n
	)

static

Definition at line 427 of file write.c.

References agattrrec(), Agsym_s::defval, Agattr_s::dict, dtfirst, dtnext, Agsym_s::id, and Agattr_s::str.

Referenced by write_node_test().

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◆ set_attrwf()

static void set_attrwf	(	Agraph_t *	g,
		bool	toplevel,
		bool	value
	)

static

Definition at line 708 of file write.c.

References AGATTRWF, agfstnode(), agfstout(), agfstsubg(), agnxtnode(), agnxtout(), agnxtsubg(), and set_attrwf().

Referenced by before_write(), and set_attrwf().

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◆ subgdfs()

static uint64_t subgdfs	(	Agraph_t *	g,
		uint64_t	ix,
		info_t *	info
	)

static

Definition at line 753 of file write.c.

References agfstsubg(), agnxtsubg(), AGSEQ, and subgdfs().

Referenced by before_write(), and subgdfs().

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◆ write_body()

static int write_body	(	Agraph_t *	g,
		iochan_t *	ofile,
		info_t *	info
	)

static

Definition at line 672 of file write.c.

References agdatadict(), agfstnode(), agfstout(), aghead, agnxtnode(), agnxtout(), AGSEQ, Agdatadict_s::dict, Agdatadict_s::e, EDGE_DONE, Agdatadict_s::n, NULL, prev, write_edges(), write_node(), write_node_test(), and write_subgs().

Referenced by agwrite(), and write_subgs().

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◆ write_canonstr()

static int write_canonstr	(	Agraph_t *	g,
		iochan_t *	ofile,
		char *	str,
		bool	known
	)

static

Parameters

known Is str already known to be a reference-counted string?

Definition at line 243 of file write.c.

References agstrdup(), agstrfree(), str, and write_canonstr_().

Referenced by write_dict(), write_edge_name(), write_hdr(), write_nodename(), write_nondefault_attrs(), and write_port().

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◆ write_canonstr_()

static int write_canonstr_	(	Agraph_t *	g,
		iochan_t *	ofile,
		char *	str,
		bool	chk
	)

static

Definition at line 224 of file write.c.

References agstrcanon(), agstrcanon_(), agstrcanon_bytes(), free(), ioput(), malloc(), NULL, and str.

Referenced by write_canonstr(), and write_port().

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◆ write_dict()

static int write_dict	(	Agraph_t *	g,
		iochan_t *	ofile,
		char *	name,
		Dict_t *	dict,
		bool	top,
		info_t *	info
	)

static

Definition at line 259 of file write.c.

References cnt(), Agsym_s::defval, dtfirst, dtnext, dtsearch, dtview(), EMPTY, indent(), ioput(), Agsym_s::name, NULL, Agsym_s::print, top(), view, and write_canonstr().

Referenced by write_dicts().

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◆ write_dicts()

static int write_dicts	(	Agraph_t *	g,
		iochan_t *	ofile,
		bool	top,
		info_t *	info
	)

static

Definition at line 308 of file write.c.

References agdatadict(), Agdatadict_s::dict, Agdatadict_s::e, Agdatadict_s::g, Agdatadict_s::n, top(), and write_dict().

Referenced by write_hdr().

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◆ write_edge()

static int write_edge	(	Agedge_t *	e,
		iochan_t *	ofile,
		Dict_t *	d,
		info_t *	info
	)

static

Definition at line 627 of file write.c.

References AGHEAD, agisdirected(), agraphof(), AGTAIL, attrs_written(), Headport, indent(), ioput(), Tailport, write_edge_name(), write_nodename(), write_nondefault_attrs(), and write_port().

Referenced by write_edges().

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◆ write_edge_name()

static int write_edge_name	(	Agedge_t *	e,
		iochan_t *	ofile,
		bool	terminate,
		info_t *	info
	)

static

Definition at line 458 of file write.c.

References agnameof(), agraphof(), EMPTY, ioput(), and write_canonstr().

Referenced by write_edge(), and write_nondefault_attrs().

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◆ write_edges()

static int write_edges	(	iochan_t *	ofile,
		Dict_t *	d,
		info_t *	info
	)

static

write out all the edges pending in info->edge

Parameters

ofile	Channel to write output to
d	Attribute defaults
info	State for traversal

Returns: 0 on success

Definition at line 659 of file write.c.

References EDGE_DONE, NULL, and write_edge().

Referenced by write_body().

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◆ write_hdr()

static int write_hdr	(	Agraph_t *	g,
		iochan_t *	ofile,
		bool	top,
		info_t *	info
	)

static

Definition at line 320 of file write.c.

References agattr_text(), AGATTRWF, AGEDGE, agisstrict(), agnameof(), agparent(), Agraph_s::desc, Agdesc_s::directed, Headport, HEADPORT_ID, indent(), ioput(), LOCALNAMEPREFIX, NULL, Tailport, TAILPORT_ID, top(), write_canonstr(), and write_dicts().

Referenced by agwrite(), and write_subgs().

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◆ write_node()

static int write_node	(	Agraph_t *	subg,
		Agnode_t *	n,
		iochan_t *	ofile,
		Dict_t *	d,
		info_t *	info
	)

static

Definition at line 559 of file write.c.

References agraphof(), AGSEQ, attrs_written(), indent(), ioput(), write_nodename(), and write_nondefault_attrs().

Referenced by write_body().

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◆ write_node_test()

static bool write_node_test	(	Agraph_t *	g,
		Agnode_t *	n,
		info_t *	info
	)

static

Definition at line 580 of file write.c.

References AGSEQ, has_no_edges(), and not_default_attrs().

Referenced by write_body().

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◆ write_nodename()

static int write_nodename	(	Agnode_t *	n,
		iochan_t *	ofile
	)

static

Definition at line 536 of file write.c.

References AGID, agnameof(), agraphof(), ioput(), and write_canonstr().

Referenced by write_edge(), and write_node().

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◆ write_nondefault_attrs()

static int write_nondefault_attrs	(	void *	obj,
		iochan_t *	ofile,
		Dict_t *	defdict,
		info_t *	info
	)

static

Definition at line 483 of file write.c.

References agattrrec(), AGATTRWF, AGINEDGE, AGOUTEDGE, agraphof(), AGTYPE, cnt(), Agsym_s::defval, dtfirst, dtnext, Headport, Agsym_s::id, indent(), ioput(), Agsym_s::name, Agattr_s::str, Tailport, write_canonstr(), and write_edge_name().

Referenced by write_edge(), and write_node().

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◆ write_port()

static int write_port	(	Agedge_t *	e,
		iochan_t *	ofile,
		Agsym_t *	port
	)

static

Definition at line 590 of file write.c.

References aghtmlstr(), agraphof(), agxget(), ioput(), write_canonstr(), and write_canonstr_().

Referenced by write_edge().

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◆ write_subgs()

static int write_subgs	(	Agraph_t *	g,
		iochan_t *	ofile,
		info_t *	info
	)

static

Definition at line 441 of file write.c.

References agfstsubg(), agnxtsubg(), irrelevant_subgraph(), write_body(), write_hdr(), write_subgs(), and write_trl().

Referenced by write_body(), and write_subgs().

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◆ write_trl()

static int write_trl	(	Agraph_t *	g,
		iochan_t *	ofile,
		info_t *	info
	)

static

Definition at line 371 of file write.c.

References indent(), and ioput().

Referenced by agwrite(), and write_subgs().

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Variable Documentation

◆ EDGE_DONE

Agedge_t* const EDGE_DONE = (Agedge_t *)-1

static

Definition at line 47 of file write.c.

Referenced by write_body(), and write_edges().

◆ Headport

Agsym_t * Headport

static

Definition at line 44 of file write.c.

Referenced by write_edge(), write_hdr(), and write_nondefault_attrs().

◆ Max_outputline

int Max_outputline = MAX_OUTPUTLINE

static

Definition at line 43 of file write.c.

Referenced by agstrcanon_(), and agwrite().

◆ Tailport

Agsym_t* Tailport

static

Definition at line 44 of file write.c.

Referenced by write_edge(), write_hdr(), and write_nondefault_attrs().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ EMPTY

◆ MAX_OUTPUTLINE

◆ MIN_OUTPUTLINE

Typedef Documentation

◆ iochan_t

Function Documentation

◆ after_write()

◆ agcanonhtmlstr()

◆ agstrcanon_()

◆ attrs_written()

◆ before_write()

◆ has_no_edges()

◆ indent()

◆ ioput()

◆ irrelevant_subgraph()

◆ is_anonymous()

◆ is_escape()

◆ is_id_char()

◆ not_default_attrs()

◆ set_attrwf()

◆ subgdfs()

◆ write_body()

◆ write_canonstr()

◆ write_canonstr_()

◆ write_dict()

◆ write_dicts()

◆ write_edge()

◆ write_edge_name()

◆ write_edges()

◆ write_hdr()

◆ write_node()

◆ write_node_test()

◆ write_nodename()

◆ write_nondefault_attrs()

◆ write_port()

◆ write_subgs()

◆ write_trl()

Variable Documentation

◆ EDGE_DONE

◆ Headport

◆ Max_outputline

◆ Tailport