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tclxslt-libxslt.c
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tclxslt-libxslt.c
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/*
* tclxslt.c --
*
* Interface to Gnome libxslt.
*
* Copyright (c) 2005-2009 Explain
* http://www.explain.com.au/
* Copyright (c) 2001-2004 Zveno Pty Ltd
* http://www.zveno.com/
*
* See the file "LICENSE" for information on usage and
* redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* $Id: tclxslt.c,v 1.30.2.2 2005/12/30 02:40:41 balls Exp $
*
*/
#include <tclxslt/tclxslt.h>
#include <string.h>
#include <libxml/parserInternals.h>
#include <libxslt/namespaces.h>
#include <libxslt/imports.h>
#include <libxslt/security.h>
#include <libxslt/preproc.h>
#include <libxslt/variables.h>
#include <libxslt/templates.h>
#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT
/*#ifdef __WIN32__
*# include "win/win32config.h"
#endif
*/
/*
* Manage stylesheet objects
*/
typedef struct TclXSLT_Stylesheet {
Tcl_Interp *interp;
char *name;
xsltStylesheetPtr stylesheet;
Tcl_HashEntry *entryPtr;
Tcl_Obj *resulturi;
Tcl_Obj *profilechannelObj;
Tcl_Obj *messagecommand;
} TclXSLT_Stylesheet;
/*
* Extension management
*/
typedef struct TclXSLT_Extension {
Tcl_Interp *interp;
Tcl_Obj *nsuri;
Tcl_Obj *tclns;
xsltTransformContextPtr xformCtxt;
} TclXSLT_Extension;
typedef struct ThreadSpecificData {
int initialised;
Tcl_Interp *interp;
int ssheetCntr;
Tcl_HashTable *stylesheets;
Tcl_HashTable *extensions;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
/*
* Prototypes for procedures defined later in this file:
*/
/*
* Forward declarations for private functions.
*/
static void TclXSLTGenericError _ANSI_ARGS_((void *ctx, const char *msg, ...));
static int TclXSLTCompileCommand _ANSI_ARGS_((ClientData dummy,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]));
static int TclXSLTInstanceCommand _ANSI_ARGS_((ClientData ssheet,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]));
static void TclXSLTDeleteStylesheet _ANSI_ARGS_((ClientData ssheet));
static int TclXSLTExtensionCommand _ANSI_ARGS_((ClientData dummy,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]));
static Tcl_Obj * GetParameters _ANSI_ARGS_((Tcl_Interp *interp,
xsltStylesheetPtr stylesheet));
static int TclXSLTTransform _ANSI_ARGS_((TclXSLT_Stylesheet *stylesheet,
Tcl_Obj *source,
int paramc,
Tcl_Obj *CONST paramv[]));
static void TclXSLT_RegisterAll _ANSI_ARGS_((TclXSLT_Extension *extinfo,
const xmlChar *nsuri));
/* static xsltExtInitFunction TclXSLTExtInit; */
static void *TclXSLTExtInit _ANSI_ARGS_((xsltTransformContextPtr ctxt,
const xmlChar *URI));
/* static xsltExtShutdownFunction TclXSLTExtShutdown; */
static void TclXSLTExtShutdown _ANSI_ARGS_((xsltTransformContextPtr ctxt,
const xmlChar *URI,
void *userdata));
/* static xmlXPathEvalFunc TclXSLTExtFunction; */
static void TclXSLTExtFunction _ANSI_ARGS_((xmlXPathParserContextPtr xpathCtxt,
int nargs));
/* static xsltPreComputeFunction TclXSLTExtElementPreComp; */
static xsltElemPreCompPtr TclXSLTExtElementPreComp _ANSI_ARGS_((xsltStylesheetPtr style,
xmlNodePtr inst,
xsltTransformFunction function));
/* static xsltTransformFunction TclXSLTExtElementTransform; */
static void TclXSLTExtElementTransform _ANSI_ARGS_((xsltTransformContextPtr ctxt,
xmlNodePtr node,
xmlNodePtr inst,
xsltStylePreCompPtr comp));
/* static xsltSecurityCheck TclXSLTSecurityReadFile; */
static int TclXSLTSecurityReadFile _ANSI_ARGS_((xsltSecurityPrefsPtr sec,
xsltTransformContextPtr ctxt,
const char *value));
/* static xsltSecurityCheck TclXSLTSecurityWriteFile; */
static int TclXSLTSecurityWriteFile _ANSI_ARGS_((xsltSecurityPrefsPtr sec,
xsltTransformContextPtr ctxt,
const char *value));
/* static xsltSecurityCheck TclXSLTSecurityCreateDirectory; */
static int TclXSLTSecurityCreateDirectory _ANSI_ARGS_((xsltSecurityPrefsPtr sec,
xsltTransformContextPtr ctxt,
const char *value));
/* static xsltSecurityCheck TclXSLTSecurityReadNetwork; */
static int TclXSLTSecurityReadNetwork _ANSI_ARGS_((xsltSecurityPrefsPtr sec,
xsltTransformContextPtr ctxt,
const char *value));
/* static xsltSecurityCheck TclXSLTSecurityWriteNetwork; */
static int TclXSLTSecurityWriteNetwork _ANSI_ARGS_((xsltSecurityPrefsPtr sec,
xsltTransformContextPtr ctxt,
const char *value));
static Tcl_Obj * TclXSLT_ConvertXPathObjToTclObj _ANSI_ARGS_((Tcl_Interp *interp,
xmlXPathObjectPtr xpobj));
static xmlXPathObjectPtr TclXSLT_ConvertTclObjToXPathObj _ANSI_ARGS_((Tcl_Interp *interp,
Tcl_Obj *objPtr));
/* Copied from libxslt-1.1.24 transform.c */
static void
xsltApplySequenceConstructor(xsltTransformContextPtr ctxt,
xmlNodePtr contextNode, xmlNodePtr list,
xsltTemplatePtr templ);
/*
* Error context for passing error result back to caller.
*/
typedef struct GenericError_Info {
Tcl_Interp *interp;
TclXSLT_Stylesheet *stylesheet;
int code;
Tcl_Obj *msg;
} GenericError_Info;
/*
* Switch tables
*/
#ifndef CONST84
#define CONST84 /* Before 8.4 no 'const' required */
#endif
static CONST84 char *instanceCommandMethods[] = {
"cget",
"configure",
"get",
"transform",
(char *) NULL
};
enum instanceCommandMethods {
TCLXSLT_CGET,
TCLXSLT_CONFIGURE,
TCLXSLT_GET,
TCLXSLT_TRANSFORM
};
static CONST84 char *instanceCommandOptions[] = {
"-messagecommand",
"-method",
"-indent",
"-resulturi",
"-profilechannel",
"-encoding",
"-omitxmldeclaration",
(char *) NULL
};
enum instanceCommandOptions {
TCLXSLT_OPTION_MESSAGECOMMAND,
TCLXSLT_OPTION_METHOD,
TCLXSLT_OPTION_INDENT,
TCLXSLT_OPTION_RESULTURI,
TCLXSLT_OPTION_PROFILECHANNEL,
TCLXSLT_OPTION_ENCODING,
TCLXSLT_OPTION_OMITXMLDECLARATION
};
static CONST84 char *instanceGetMethods[] = {
"parameters",
(char *) NULL
};
enum instanceGetMethods {
TCLXSLT_GET_PARAMETERS
};
static CONST84 char *extensionCommandMethods[] = {
"add",
"remove",
(char *) NULL
};
enum extensionCommandMethods {
TCLXSLT_EXT_ADD,
TCLXSLT_EXT_REMOVE
};
/*
* libxml2 and libxslt are mostly thread-safe,
* but there are issues with error callbacks.
*/
TCL_DECLARE_MUTEX(libxslt)
/*
*----------------------------------------------------------------------------
*
* Tclxslt_libxslt_Init --
*
* Initialisation routine for loadable module
*
* Results:
* None.
*
* Side effects:
* Creates commands in the interpreter,
*
*----------------------------------------------------------------------------
*/
int
Tclxslt_libxslt_Init (interp)
Tcl_Interp *interp; /* Interpreter to initialise */
{
ThreadSpecificData *tsdPtr;
xsltSecurityPrefsPtr sec;
tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialised) {
tsdPtr->initialised = 1;
tsdPtr->interp = interp;
tsdPtr->ssheetCntr = 0;
tsdPtr->stylesheets = (Tcl_HashTable *) Tcl_Alloc(sizeof(Tcl_HashTable));
Tcl_InitHashTable(tsdPtr->stylesheets, TCL_ONE_WORD_KEYS);
tsdPtr->extensions = (Tcl_HashTable *) Tcl_Alloc(sizeof(Tcl_HashTable));
Tcl_InitHashTable(tsdPtr->extensions, TCL_STRING_KEYS);
} /* only need to init the library once per process */
Tcl_CreateObjCommand(interp, "xslt::compile", TclXSLTCompileCommand, NULL, NULL);
Tcl_CreateObjCommand(interp, "xslt::extension", TclXSLTExtensionCommand, NULL, NULL);
Tcl_MutexLock(&libxslt);
#ifndef TCLXML_STATIC_TCLXSLT
exsltRegisterAll();
#endif /* TCLXML_STATIC_TCLXSLT */
/*
* Setup security preferences
*/
sec = xsltNewSecurityPrefs();
if (xsltSetSecurityPrefs(sec, XSLT_SECPREF_READ_FILE,
TclXSLTSecurityReadFile)) {
Tcl_SetResult(interp, "unable to set readfile security", NULL);
return TCL_ERROR;
}
if (xsltSetSecurityPrefs(sec, XSLT_SECPREF_WRITE_FILE,
TclXSLTSecurityWriteFile)) {
Tcl_SetResult(interp, "unable to set writefile security", NULL);
return TCL_ERROR;
}
if (xsltSetSecurityPrefs(sec, XSLT_SECPREF_CREATE_DIRECTORY,
TclXSLTSecurityCreateDirectory)) {
Tcl_SetResult(interp, "unable to set createdirectory security", NULL);
return TCL_ERROR;
}
if (xsltSetSecurityPrefs(sec, XSLT_SECPREF_READ_NETWORK,
TclXSLTSecurityReadNetwork)) {
Tcl_SetResult(interp, "unable to set readnetwork security", NULL);
return TCL_ERROR;
}
if (xsltSetSecurityPrefs(sec, XSLT_SECPREF_WRITE_NETWORK,
TclXSLTSecurityWriteNetwork)) {
Tcl_SetResult(interp, "unable to set writenetwork security", NULL);
return TCL_ERROR;
}
/* xsltSetCtxtSecurityPrefs(sec, userCtxt); */
xsltSetDefaultSecurityPrefs(sec);
Tcl_MutexUnlock(&libxslt);
Tcl_SetVar2Ex(interp, "::xslt::libxsltversion", NULL, Tcl_NewStringObj(xsltEngineVersion, -1), 0);
Tcl_SetVar2Ex(interp, "::xslt::libexsltversion", NULL, Tcl_NewStringObj(exsltLibraryVersion, -1), 0);
return TCL_OK;
}
/*
* XSLT is not safe due to the document(), xsl:include and xsl:import functions/elements.
* However, libxslt checks whether access is permitted to external resources.
*
* NOTE: need to make sure decision to allow access to resources is made by a trusted interpreter, not the untrusted slave. Even better, use a mechanism similar to TclXML/libxml2 to access external resources.
*/
int
Tclxslt_libxslt_SafeInit (interp)
Tcl_Interp *interp; /* Interpreter to initialise */
{
return Tclxslt_libxslt_Init(interp);
}
/*
*----------------------------------------------------------------------------
*
* TclXSLTCompileCommand --
*
* Class creation command for xslt stylesheet objects.
*
* Results:
* Compiles the XSLT stylesheet.
* Creates a Tcl command associated with that stylesheet.
*
* Side effects:
* Memory allocated, stylesheet is compiled.
*
*----------------------------------------------------------------------------
*/
static int
TclXSLTCompileCommand(dummy, interp, objc, objv)
ClientData dummy;
Tcl_Interp *interp;
int objc;
Tcl_Obj *CONST objv[];
{
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
TclXSLT_Stylesheet *info;
xmlDocPtr origDoc, doc;
xsltStylesheetPtr ssheetPtr = NULL;
void *oldxsltErrorCtx, *oldxmlErrorCtx;
xmlGenericErrorFunc old_xsltGenericError, old_xmlGenericError;
GenericError_Info *errorInfoPtr;
Tcl_Obj *errObjPtr = NULL;
int new;
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "stylesheet-doc");
return TCL_ERROR;
}
if (TclXML_libxml2_GetDocFromObj(interp, objv[1], &origDoc) != TCL_OK) {
return TCL_ERROR;
}
Tcl_MutexLock(&libxslt);
doc = xmlCopyDoc(origDoc, 1);
/*
* xmlCopyDoc doesn't copy some of the fields.
*/
if (origDoc->URL) {
doc->URL = (const xmlChar *) xmlMalloc(strlen((char *) origDoc->URL) + 1);
strcpy((char *) doc->URL, (char *) origDoc->URL);
}
/*
* Prepare for compiling stylesheet
*/
TclXML_libxml2_ResetError(interp);
errorInfoPtr = (GenericError_Info *) Tcl_Alloc(sizeof(GenericError_Info));
errorInfoPtr->interp = interp;
errorInfoPtr->stylesheet = NULL;
errorInfoPtr->code = TCL_OK;
errorInfoPtr->msg = NULL;
xmlSetGenericErrorFunc((void *) errorInfoPtr,
TclXSLTGenericError);
/*
* Save the previous error context so that it can
* be restored upon completion of the operation.
*/
old_xsltGenericError = xsltGenericError;
oldxsltErrorCtx = xsltGenericErrorContext;
old_xmlGenericError = xmlGenericError;
oldxmlErrorCtx = xmlGenericErrorContext;
xmlSetGenericErrorFunc((void *) errorInfoPtr,
TclXSLTGenericError);
xsltSetGenericErrorFunc((void *) errorInfoPtr, TclXSLTGenericError);
/*
* Compile stylesheet
*/
ssheetPtr = xsltParseStylesheetDoc(doc);
xmlSetGenericErrorFunc((void *) oldxmlErrorCtx, old_xmlGenericError);
xsltSetGenericErrorFunc((void *) oldxsltErrorCtx, old_xsltGenericError);
Tcl_MutexUnlock(&libxslt);
errObjPtr = TclXML_libxml2_GetErrorObj(interp);
if (ssheetPtr == NULL) {
Tcl_SetResult(interp, "error compiling stylesheet", NULL);
goto error;
}
if (ssheetPtr->errors > 0) {
Tcl_SetResult(interp, "error compiling XSLT stylesheet", NULL);
goto error;
}
if (errorInfoPtr->code != TCL_OK) {
goto error;
}
/* TODO: notify app of any warnings */
info = (TclXSLT_Stylesheet *) Tcl_Alloc(sizeof(TclXSLT_Stylesheet));
info->interp = interp;
info->name = Tcl_Alloc(20);
sprintf(info->name, "style%d", tsdPtr->ssheetCntr++);
info->stylesheet = ssheetPtr;
info->messagecommand = NULL;
info->resulturi = NULL;
info->profilechannelObj = NULL;
/*
* Create reverse mapping of stylesheet to name of stylesheet command.
*/
info->entryPtr = Tcl_CreateHashEntry(tsdPtr->stylesheets, (ClientData) ssheetPtr, &new);
/* sanity check: new == 1 */
Tcl_SetHashValue(info->entryPtr, (ClientData) info->name);
Tcl_CreateObjCommand(interp, info->name, TclXSLTInstanceCommand, (ClientData) info, TclXSLTDeleteStylesheet);
Tcl_SetObjResult(interp, Tcl_NewStringObj(info->name, -1));
return TCL_OK;
error:
if (errObjPtr) {
Tcl_SetObjResult(interp, errObjPtr);
} else if (errorInfoPtr->msg) {
Tcl_SetObjResult(interp, errorInfoPtr->msg);
Tcl_DecrRefCount(errorInfoPtr->msg);
}
Tcl_Free((char *) errorInfoPtr);
Tcl_MutexLock(&libxslt);
if (ssheetPtr) {
xsltFreeStylesheet(ssheetPtr);
} else {
xmlFreeDoc(doc);
}
Tcl_MutexUnlock(&libxslt);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------------
*
* TclXSLTDeleteStylesheet --
*
* Class destruction command for xslt stylesheet objects.
*
* Results:
* Frees memory associated with a stylesheet.
*
* Side effects:
* Memory deallocated.
*
*----------------------------------------------------------------------------
*/
static void
TclXSLTDeleteStylesheet(clientData)
ClientData clientData;
{
TclXSLT_Stylesheet *ssheet = (TclXSLT_Stylesheet *) clientData;
Tcl_DeleteHashEntry(ssheet->entryPtr);
Tcl_Free(ssheet->name);
if (ssheet->messagecommand) {
Tcl_DecrRefCount(ssheet->messagecommand);
}
if (ssheet->resulturi) {
Tcl_DecrRefCount(ssheet->resulturi);
}
if (ssheet->profilechannelObj) {
Tcl_DecrRefCount(ssheet->profilechannelObj);
}
Tcl_MutexLock(&libxslt);
xsltFreeStylesheet(ssheet->stylesheet); /* Also frees document */
Tcl_MutexUnlock(&libxslt);
Tcl_Free((char *) ssheet);
}
/*
*----------------------------------------------------------------------------
*
* TclXSLTInstanceCommand --
*
* Handles the stylesheet object command.
*
* Results:
* Depends on method.
*
* Side effects:
* Depends on method.
*
*----------------------------------------------------------------------------
*/
static int
TclXSLTInstanceCommand(clientData, interp, objc, objv)
ClientData clientData;
Tcl_Interp *interp;
int objc;
Tcl_Obj *CONST objv[];
{
TclXSLT_Stylesheet *ssheet = (TclXSLT_Stylesheet *) clientData;
int method, option, indent = 0, theOmitXMLDeclaration = 0;
const xmlChar *theMethod, *theEncoding;
if (objc < 3) {
Tcl_WrongNumArgs(interp, 1, objv, "method ?args ...?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], instanceCommandMethods,
"method", 0, &method) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum instanceCommandMethods) method) {
case TCLXSLT_CGET:
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "option");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[2], instanceCommandOptions,
"option", 0, &option) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum instanceCommandOptions) option) {
case TCLXSLT_OPTION_METHOD:
XSLT_GET_IMPORT_PTR(theMethod, ssheet->stylesheet, method);
if (theMethod != NULL) {
Tcl_SetObjResult(interp, Tcl_NewStringObj((CONST char *) theMethod, -1));
} /* theMethod == NULL means XML method; result should be empty.
EXCEPTION: if the result document is of type XML_HTML_DOCUMENT_NODE
then the method should be "html".
*/
break;
case TCLXSLT_OPTION_ENCODING:
XSLT_GET_IMPORT_PTR(theEncoding, ssheet->stylesheet, encoding);
if (theEncoding != NULL) {
Tcl_SetObjResult(interp, Tcl_NewStringObj((CONST char *) theEncoding, -1));
} /* theEncoding == NULL means default (UTF-8) encoding; result should be empty.
*/
break;
case TCLXSLT_OPTION_OMITXMLDECLARATION:
XSLT_GET_IMPORT_INT(theOmitXMLDeclaration, ssheet->stylesheet, omitXmlDeclaration);
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(theOmitXMLDeclaration == 1));
break;
case TCLXSLT_OPTION_INDENT:
XSLT_GET_IMPORT_INT(indent, ssheet->stylesheet, indent);
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(indent));
break;
case TCLXSLT_OPTION_MESSAGECOMMAND:
if (ssheet->messagecommand != NULL) {
Tcl_SetObjResult(interp, ssheet->messagecommand);
}
break;
case TCLXSLT_OPTION_RESULTURI:
if (ssheet->resulturi != NULL) {
Tcl_SetObjResult(interp, ssheet->resulturi);
}
break;
case TCLXSLT_OPTION_PROFILECHANNEL:
if (ssheet->profilechannelObj != NULL) {
Tcl_SetObjResult(interp, ssheet->profilechannelObj);
}
break;
default:
Tcl_SetResult(interp, "unknown option", NULL);
return TCL_ERROR;
}
break;
case TCLXSLT_CONFIGURE:
if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "option value");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[2], instanceCommandOptions,
"option", 0, &option) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum instanceCommandOptions) option) {
case TCLXSLT_OPTION_METHOD:
case TCLXSLT_OPTION_INDENT:
case TCLXSLT_OPTION_ENCODING:
case TCLXSLT_OPTION_OMITXMLDECLARATION:
Tcl_SetResult(interp, "read-only option", NULL);
return TCL_ERROR;
break;
case TCLXSLT_OPTION_MESSAGECOMMAND:
if (ssheet->messagecommand != NULL) {
Tcl_DecrRefCount(ssheet->messagecommand);
}
ssheet->messagecommand = objv[3];
Tcl_IncrRefCount(ssheet->messagecommand);
break;
case TCLXSLT_OPTION_RESULTURI:
if (ssheet->resulturi != NULL) {
Tcl_DecrRefCount(ssheet->resulturi);
}
ssheet->resulturi = objv[3];
Tcl_IncrRefCount(ssheet->resulturi);
break;
case TCLXSLT_OPTION_PROFILECHANNEL:
if (ssheet->profilechannelObj != NULL) {
Tcl_DecrRefCount(ssheet->profilechannelObj);
}
#ifdef __WIN32__
Tcl_SetResult(interp, "profiling not available", NULL);
return TCL_ERROR;
#else
ssheet->profilechannelObj = objv[3];
Tcl_IncrRefCount(ssheet->profilechannelObj);
#endif
break;
default:
Tcl_SetResult(interp, "unknown option", NULL);
return TCL_ERROR;
}
break;
case TCLXSLT_GET:
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "name");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[2], instanceGetMethods,
"name", 0, &option) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum instanceGetMethods) option) {
case TCLXSLT_GET_PARAMETERS:
Tcl_SetObjResult(interp, GetParameters(interp, ssheet->stylesheet));
break;
default:
Tcl_SetResult(interp, "unknown name", NULL);
return TCL_ERROR;
}
break;
case TCLXSLT_TRANSFORM:
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "source ?param value...?");
return TCL_ERROR;
}
return TclXSLTTransform(ssheet, objv[2], objc - 3, &objv[3]);
break;
default:
Tcl_SetResult(interp, "unknown method", NULL);
return TCL_OK;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------------
*
* TclXSLTTransform --
*
* Performs an XSL transformation.
*
* Results:
* Result document created.
*
* Side effects:
* Memory allocated for result document.
*
*----------------------------------------------------------------------------
*/
static int
TclXSLTTransform(stylesheet, source, paramc, paramv)
TclXSLT_Stylesheet *stylesheet;
Tcl_Obj *source;
int paramc;
Tcl_Obj *CONST paramv[];
{
xmlDocPtr doc, result;
char **params = NULL;
int nbparams = 0, i;
GenericError_Info *errorInfoPtr;
void *oldxsltErrorCtx, *oldxmlErrorCtx;
xmlGenericErrorFunc old_xsltGenericError, old_xmlGenericError;
Tcl_Obj *resultObjPtr, *errObjPtr = NULL;
char *resulturi = NULL;
FILE *profile = NULL;
xsltTransformContextPtr userCtxt = NULL;
errorInfoPtr = (GenericError_Info *) Tcl_Alloc(sizeof(GenericError_Info));
errorInfoPtr->interp = stylesheet->interp;
errorInfoPtr->stylesheet = stylesheet;
errorInfoPtr->code = TCL_OK;
errorInfoPtr->msg = NULL;
if (TclXML_libxml2_GetDocFromObj(stylesheet->interp, source, &doc) != TCL_OK) {
goto error;
}
TclXML_libxml2_ResetError(stylesheet->interp);
params = (char **) Tcl_Alloc(sizeof(char **) * (paramc + 1));
for (i = 0; i < paramc; i++) {
params[nbparams++] = Tcl_GetStringFromObj(paramv[i++], NULL);
params[nbparams++] = Tcl_GetStringFromObj(paramv[i], NULL);
}
params[nbparams] = NULL;
if (stylesheet->resulturi) {
resulturi = Tcl_GetStringFromObj(stylesheet->resulturi, NULL);
}
#ifdef __WIN32__
/* Tcl_GetOpenFile not available on Windows */
#else
if (stylesheet->profilechannelObj) {
if (Tcl_GetOpenFile(stylesheet->interp,
Tcl_GetStringFromObj(stylesheet->profilechannelObj, NULL),
1, 1,
(ClientData *) &profile) != TCL_OK) {
goto error;
}
}
#endif
/*
* Perform the transformation
*/
Tcl_MutexLock(&libxslt);
/*
* Save the previous error context so that it can
* be restored upon completion of the transformation.
* This is necessary because transformations may occur
* recursively (usually due to extensions).
*/
old_xsltGenericError = xsltGenericError;
oldxsltErrorCtx = xsltGenericErrorContext;
old_xmlGenericError = xmlGenericError;
oldxmlErrorCtx = xmlGenericErrorContext;
xmlSetGenericErrorFunc((void *) errorInfoPtr,
TclXSLTGenericError);
xsltSetGenericErrorFunc((void *) errorInfoPtr, TclXSLTGenericError);
userCtxt = xsltNewTransformContext(stylesheet->stylesheet, doc);
if (userCtxt == NULL) {
xmlSetGenericErrorFunc((void *) oldxmlErrorCtx, old_xmlGenericError);
xsltSetGenericErrorFunc((void *) oldxsltErrorCtx, old_xsltGenericError);
Tcl_MutexUnlock(&libxslt);
Tcl_SetResult(stylesheet->interp, "unable to create transformation context", NULL);
goto error;
}
result = xsltApplyStylesheetUser(stylesheet->stylesheet,
doc,
(const char **)params,
resulturi,
profile,
userCtxt);
xsltFreeTransformContext(userCtxt);
xmlSetGenericErrorFunc((void *) oldxmlErrorCtx, old_xmlGenericError);
xsltSetGenericErrorFunc((void *) oldxsltErrorCtx, old_xsltGenericError);
Tcl_MutexUnlock(&libxslt);
errObjPtr = TclXML_libxml2_GetErrorObj(stylesheet->interp);
if (result == NULL) {
Tcl_Obj *resultPtr = Tcl_NewStringObj("no result document: ", -1);
if (errObjPtr) {
Tcl_AppendObjToObj(resultPtr, errObjPtr);
Tcl_SetObjResult(stylesheet->interp, resultPtr);
goto error;
} else {
if (errorInfoPtr->msg) {
Tcl_AppendObjToObj(resultPtr, errorInfoPtr->msg);
}
Tcl_SetObjResult(stylesheet->interp, resultPtr);
goto error;
}
}
if ((errObjPtr || (errorInfoPtr->code != TCL_OK && errorInfoPtr->msg)) && stylesheet->messagecommand) {
/* We have produced a result, but there may possibly
* have been errors. Trouble is, there might also
* have been some completely innocent messages.
* -messageCommand is the only way to find out about these.
*/
Tcl_Obj *cmdPtr = Tcl_DuplicateObj(stylesheet->messagecommand);
if (errObjPtr) {
if (Tcl_ListObjAppendElement(stylesheet->interp, cmdPtr, errObjPtr) != TCL_OK) {
goto error;
}
} else {
if (Tcl_ListObjAppendElement(stylesheet->interp, cmdPtr, errorInfoPtr->msg) != TCL_OK) {
goto error;
}
}
if (Tcl_GlobalEvalObj(stylesheet->interp, cmdPtr) != TCL_OK) {
Tcl_Obj *resultPtr = Tcl_NewStringObj("message command failed: ", -1);
Tcl_AppendObjToObj(resultPtr, Tcl_GetObjResult(stylesheet->interp));
Tcl_SetObjResult(stylesheet->interp, resultPtr);
goto error;
}
}
resultObjPtr = TclDOM_libxml2_CreateObjFromDoc(stylesheet->interp, result);
Tcl_SetObjResult(stylesheet->interp, resultObjPtr);
if (errorInfoPtr->msg) {
Tcl_DecrRefCount(errorInfoPtr->msg);
}
Tcl_Free((char *) errorInfoPtr);
Tcl_Free((char *) params);
return TCL_OK;
error:
if (errorInfoPtr->msg) {
Tcl_DecrRefCount(errorInfoPtr->msg);
}
if (params) {
Tcl_Free((char *) params);
}
Tcl_Free((char *) errorInfoPtr);
return TCL_ERROR;
}
void
ListObjAppendUniqueList(interp, tablePtr, listPtr, newElementsPtr)
Tcl_Interp *interp;
Tcl_HashTable *tablePtr;
Tcl_Obj *listPtr;
Tcl_Obj *newElementsPtr;
{
int len, idx;
Tcl_Obj *elementPtr, *keyPtr, *namePtr, *nameURIPtr;
Tcl_HashEntry *entryPtr;
Tcl_ListObjLength(interp, newElementsPtr, &len);
for (idx = 0; idx < len; idx++) {
Tcl_ListObjIndex(interp, newElementsPtr, idx, &elementPtr);
Tcl_ListObjIndex(interp, elementPtr, 0, &namePtr);
Tcl_ListObjIndex(interp, elementPtr, 1, &nameURIPtr);
keyPtr = Tcl_NewObj();
Tcl_AppendStringsToObj(keyPtr,
Tcl_GetStringFromObj(nameURIPtr, NULL),
"^",
Tcl_GetStringFromObj(namePtr, NULL),
NULL);
entryPtr = Tcl_FindHashEntry(tablePtr, (CONST char *) keyPtr);
if (entryPtr == NULL) {
Tcl_ListObjAppendElement(interp, listPtr, elementPtr);
}
Tcl_DecrRefCount(keyPtr);
}
}
/*
*----------------------------------------------------------------------------
*
* GetParameters --
*
* Retrieves the parameters for a stylesheet.
*
* Results:
* Returns a Tcl list object.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------------
*/
static Tcl_Obj *
GetParameters(interp, stylesheet)
Tcl_Interp *interp;
xsltStylesheetPtr stylesheet;
{
Tcl_Obj *resultPtr, *objPtr, *keyPtr;
xsltStackElemPtr varPtr;
Tcl_HashTable entries; /* to keep track of parameter qnames */
int new;
if (stylesheet == NULL) {
return NULL;
}
resultPtr = Tcl_NewListObj(0, NULL);
Tcl_InitObjHashTable(&entries);
for (varPtr = stylesheet->variables; varPtr; varPtr = varPtr->next) {
Tcl_Obj *listPtr;
if (strcmp((char *) varPtr->comp->inst->name, "param") == 0) {
listPtr = Tcl_NewListObj(0, NULL);
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj((CONST char *) varPtr->name, -1));
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj((CONST char *) varPtr->nameURI, -1));
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj((CONST char *) varPtr->select, -1));
Tcl_ListObjAppendElement(interp, resultPtr, listPtr);
keyPtr = Tcl_NewStringObj((CONST char *) varPtr->nameURI, -1);
Tcl_AppendStringsToObj(keyPtr, "^", varPtr->name, NULL);
Tcl_CreateHashEntry(&entries, (CONST char *) keyPtr, &new);
}
}
objPtr = GetParameters(interp, stylesheet->next);
if (objPtr) {
ListObjAppendUniqueList(interp, &entries, resultPtr, objPtr);
}
objPtr = GetParameters(interp, stylesheet->imports);
if (objPtr) {
ListObjAppendUniqueList(interp, &entries, resultPtr, objPtr);