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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
*************************************************************************/
#include "tcldot.h"
#include "../tcl-compat.h"
#include <cgraph/rdr.h>
#include <stdlib.h>
#include <string.h>
#include <tcl.h>
#include <util/alloc.h>
#include <util/streq.h>
static int dotnew_internal(ClientData clientData, Tcl_Interp *interp, int argc,
char *argv[]) {
ictx_t *ictx = (ictx_t *)clientData;
Agraph_t *g;
int i;
Agdesc_t kind;
if (argc < 2) {
Tcl_AppendResult(
interp, "wrong # args: should be \"", argv[0],
" graphtype ?graphname? ?attributename attributevalue? ?...?\"", NULL);
return TCL_ERROR;
}
if (streq("digraph", argv[1])) {
kind = Agdirected;
} else if (streq("digraphstrict", argv[1])) {
kind = Agstrictdirected;
} else if (streq("graph", argv[1])) {
kind = Agundirected;
} else if (streq("graphstrict", argv[1])) {
kind = Agstrictundirected;
} else {
Tcl_AppendResult(interp, "bad graphtype \"", argv[1], "\": must be one of:",
"\n\tdigraph, digraphstrict, graph, graphstrict.", NULL);
return TCL_ERROR;
}
if (argc % 2) {
/* if odd number of args then argv[2] is name */
g = agopen(argv[2], kind, &ictx->mydisc);
i = 3;
} else {
/* else use handle as name */
#if TCL_MAJOR_VERSION == 8 && TCL_MINOR_VERSION >= 4
char *name = gv_strdup(Tcl_GetStringResult(interp));
g = agopen(name, kind, &ictx->mydisc);
free(name);
#else
g = agopen(Tcl_GetStringResult(interp), kind, &ictx->mydisc);
#endif
i = 2;
}
if (!g) {
Tcl_AppendResult(interp, "\nFailure to open graph.", NULL);
return TCL_ERROR;
}
setgraphattributes(g, &argv[i], (Tcl_Size)(argc - i));
Tcl_AppendResult(interp, obj2cmd(g), NULL);
return TCL_OK;
}
static int dotnew(ClientData clientData, Tcl_Interp *interp, int argc,
const char *argv[]) {
char **argv_copy = tcldot_argv_dup((Tcl_Size)argc, argv);
int rc = dotnew_internal(clientData, interp, argc, argv_copy);
tcldot_argv_free((Tcl_Size)argc, argv_copy);
return rc;
}
static int dotread(ClientData clientData, Tcl_Interp *interp, int argc,
const char *argv[]) {
Agraph_t *g;
Tcl_Channel channel;
int mode;
ictx_t *ictx = (ictx_t *)clientData;
ictx->myioDisc.afread =
myiodisc_afread; /* replace afread to use Tcl Channels */
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" fileHandle\"", NULL);
return TCL_ERROR;
}
channel = Tcl_GetChannel(interp, argv[1], &mode);
if (channel == NULL || !(mode & TCL_READABLE)) {
Tcl_AppendResult(interp, "\nChannel \"", argv[1], "\"", "is unreadable.",
NULL);
return TCL_ERROR;
}
/*
* read a graph from the channel, the channel is left open
* ready to read the first line after the last line of
* a properly parsed graph. If the graph doesn't parse
* during reading then the channel will be left at EOF
*/
g = agread((FILE *)channel, (Agdisc_t *)clientData);
if (!g) {
Tcl_AppendResult(interp, "\nFailure to read graph \"", argv[1], "\"", NULL);
if (agerrors()) {
Tcl_AppendResult(interp, " because of syntax errors.", NULL);
}
return TCL_ERROR;
}
if (agerrors()) {
Tcl_AppendResult(interp, "\nSyntax errors in file \"", argv[1], " \"",
NULL);
return TCL_ERROR;
}
Tcl_AppendResult(interp, obj2cmd(g), NULL);
return TCL_OK;
}
static int dotstring(ClientData clientData, Tcl_Interp *interp, int argc,
const char *argv[]) {
Agraph_t *g;
ictx_t *ictx = (ictx_t *)clientData;
rdr_t rdr;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " string\"",
NULL);
return TCL_ERROR;
}
ictx->myioDisc.afread =
myiodisc_memiofread; /* replace afread to use memory range */
rdr.data = argv[1];
rdr.len = strlen(rdr.data);
rdr.cur = 0;
/* agmemread() is broken for our use because it replaces the id disc */
g = agread(&rdr, (Agdisc_t *)clientData);
if (!g) {
Tcl_AppendResult(interp, "\nFailure to read string \"", argv[1], "\"",
NULL);
if (agerrors()) {
Tcl_AppendResult(interp, " because of syntax errors.", NULL);
}
return TCL_ERROR;
}
if (agerrors()) {
Tcl_AppendResult(interp, "\nSyntax errors in string \"", argv[1], " \"",
NULL);
return TCL_ERROR;
}
Tcl_AppendResult(interp, obj2cmd(g), NULL);
return TCL_OK;
}
int Tcldot_Init(Tcl_Interp *interp);
int Tcldot_Init(Tcl_Interp *interp) {
ictx_t *ictx = calloc(1, sizeof(ictx_t));
if (!ictx)
return TCL_ERROR;
ictx->interp = interp;
/* build disciplines dynamically so we can selectively replace functions */
ictx->myioDisc.afread =
NULL; /* set in dotread() or dotstring() according to need */
ictx->myioDisc.putstr = AgIoDisc.putstr; /* no change */
ictx->myioDisc.flush = AgIoDisc.flush; /* no change */
ictx->mydisc.id = &myiddisc; /* complete replacement */
ictx->mydisc.io = &ictx->myioDisc; /* change parts */
ictx->ctr = 1; /* init to first odd number, increment by 2 */
#ifdef USE_TCL_STUBS
if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) {
free(ictx);
return TCL_ERROR;
}
#else
if (Tcl_PkgRequire(interp, "Tcl", TCL_VERSION, 0) == NULL) {
free(ictx);
return TCL_ERROR;
}
#endif
// inter-release Graphviz versions have a number including '~dev.' that does
// not comply with TCL version number rules, so replace this with 'b'
char adjusted_version[sizeof(PACKAGE_VERSION)] = PACKAGE_VERSION;
char *tilde_dev = strstr(adjusted_version, "~dev.");
if (tilde_dev != NULL) {
*tilde_dev = 'b';
memmove(tilde_dev + 1, tilde_dev + strlen("~dev."),
strlen(tilde_dev + strlen("~dev.")) + 1);
}
if (Tcl_PkgProvide(interp, "Tcldot", adjusted_version) != TCL_OK) {
free(ictx);
return TCL_ERROR;
}
#ifdef HAVE_LIBGD
Gdtclft_Init(interp);
#endif
/* create a GraphViz Context and pass a pointer to it in clientdata */
ictx->gvc = gvContextPlugins(lt_preloaded_symbols, DEMAND_LOADING);
Tcl_CreateCommand(interp, "dotnew", dotnew, ictx, free);
Tcl_CreateCommand(interp, "dotread", dotread, ictx, NULL);
Tcl_CreateCommand(interp, "dotstring", dotstring, ictx, NULL);
return TCL_OK;
}
int Tcldot_SafeInit(Tcl_Interp *interp);
int Tcldot_SafeInit(Tcl_Interp *interp) { return Tcldot_Init(interp); }
int Tcldot_builtin_Init(Tcl_Interp *interp);
int Tcldot_builtin_Init(Tcl_Interp *interp) { return Tcldot_Init(interp); }
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