gvcontext.c

Go to the documentation of this file.

/*************************************************************************
 * 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
 *************************************************************************/
 
/*
    A gvcontext is a single instance of a GVC_t data structure providing
    for a set of plugins for processing one graph at a time, and a job
    description provividing for a sequence of graph jobs.
 
    Sometime in the future it may become the basis for a thread.
 */
 
#include "config.h"
 
#include <stdlib.h>
 
#include "builddate.h"
#include <cgraph/alloc.h>
#include <common/render.h>
#include <common/types.h>
#include <gvc/gvplugin.h>
#include <gvc/gvcjob.h>
#include <gvc/gvcint.h>
#include <gvc/gvcproc.h>
#include <gvc/gvc.h>
 
/* from common/textspan.c */
extern void textfont_dict_close(GVC_t *gvc);
 
/* from common/globals.c */
extern int graphviz_errors;
 
static char *LibInfo[] = {
    "graphviz",         /* Program */
    PACKAGE_VERSION,   /* Version */
    BUILDDATE           /* Build Date */
};
 
GVC_t *gvNEWcontext(const lt_symlist_t *builtins, int demand_loading)
{
    GVC_t *gvc = gv_alloc(sizeof(GVC_t));
 
    gvc->common.info = LibInfo;
    gvc->common.errorfn = agerrorf;
    gvc->common.builtins = builtins;
    gvc->common.demand_loading = demand_loading;
 
    return gvc;
}
 
void gvFinalize(GVC_t * gvc)
{
    if (gvc->active_jobs)
        gvrender_end_job(gvc->active_jobs);
}
 
 
int gvFreeContext(GVC_t * gvc)
{
    GVG_t *gvg, *gvg_next;
    gvplugin_package_t *package, *package_next;
    gvplugin_available_t *api, *api_next;
 
    emit_once_reset();
    gvg_next = gvc->gvgs;
    while ((gvg = gvg_next)) {
        gvg_next = gvg->next;
        free(gvg);
    }
    package_next = gvc->packages;
    while ((package = package_next)) {
        package_next = package->next;
        free(package->path);
        free(package->name);
        free(package);
    }
    gvjobs_delete(gvc);
    free(gvc->config_path);
    free(gvc->input_filenames);
    textfont_dict_close(gvc);
    for (size_t i = 0; i < sizeof(gvc->apis) / sizeof(gvc->apis[0]); ++i) {
        for (api = gvc->apis[i]; api != NULL; api = api_next) {
            api_next = api->next;
            free(api->typestr);
            free(api);
        }
    }
    free(gvc);
    return (graphviz_errors + agerrors());
}
 
GVC_t* gvCloneGVC (GVC_t * gvc0)
{
    GVC_t *gvc = gv_alloc(sizeof(GVC_t));
 
    gvc->common = gvc0->common;
    memcpy (&gvc->apis, &gvc0->apis, sizeof(gvc->apis));
    memcpy (&gvc->api, &gvc0->api, sizeof(gvc->api));
    gvc->packages = gvc0->packages;
    
    return gvc;
}
 
void gvFreeCloneGVC (GVC_t * gvc)
{
    gvjobs_delete(gvc);
    free(gvc);
}