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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Sablotron XSLT Processor.
*
* The Initial Developer of the Original Code is Ginger Alliance Ltd.
* Portions created by Ginger Alliance are Copyright (C) 2000-2002
* Ginger Alliance Ltd. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
#ifndef ShandlerHIncl
#define ShandlerHIncl
/* we have to deal with the size_t type, sys/types.h;
is needed on some platforms */
#if !defined(_MSC_VER) && !defined(__BORLANDC__)
#include <sabcfg.h>
#endif
#include <stddef.h>
/* GP: clean */
/*****************************************************************
handler types
*****************************************************************/
typedef enum
{
HLR_MESSAGE = 0,
HLR_SCHEME,
HLR_SAX,
HLR_MISC,
HLR_ENC
} HandlerType;
extern const char* hlrTypeNames[]; /* found in base.cpp */
typedef enum
{
SH_ERR_OK = 0,
SH_ERR_NOT_OK = 1,
SH_ERR_UNSUPPORTED_SCHEME
} SchemeHandlerErrors;
/*****************************************************************
SchemeHandler
is a structure for a scheme handler. It contains pointers to
the following functions of the handler:
open(), get(), put(), close().
All of these function return an error flag (0=OK, 1=not).
open() may also return SH_ERR_UNSUPPORTED_SCHEME.
*****************************************************************/
/* getAll: open the URI and return the whole string
scheme = URI scheme (e.g. "http")
rest = the rest of the URI (without colon)
the document is returned in a handler-allocated buffer
byteCount holds the byte count on return
return *buffer = NULL if not processed
*/
typedef int SchemeHandlerGetAll(void *userData, SablotHandle processor_,
const char *scheme, const char *rest,
char **buffer, int *byteCount);
/* freeMemory: free the buffer allocated by getAll
*/
typedef int SchemeHandlerFreeMemory(void *userData, SablotHandle processor_,
char *buffer);
/* open: open the URI and return a handle
scheme = URI scheme (e.g. "http")
rest = the rest of the URI (without colon)
the resulting handle is returned in '*handle'
*/
typedef int SchemeHandlerOpen(void *userData, SablotHandle processor_,
const char *scheme, const char *rest, int *handle);
/* get: retrieve data from the URI
handle = the handle assigned on open
buffer = pointer to the data
*byteCount = number of bytes to read
(the number actually read is returned here)
*/
typedef int SchemeHandlerGet(void *userData, SablotHandle processor_,
int handle, char *buffer, int *byteCount);
/* put: save data to the URI (if possible)
handle = the handle assigned on open
buffer = pointer to the data
*byteCount = number of bytes to write
(the number actually written is returned here)
*/
typedef int SchemeHandlerPut(void *userData, SablotHandle processor_,
int handle, const char *buffer, int *byteCount);
/* close: close the URI with the given handle
handle = the handle assigned on open
*/
typedef int SchemeHandlerClose(void *userData, SablotHandle processor_,
int handle);
typedef struct
{
SchemeHandlerGetAll *getAll;
SchemeHandlerFreeMemory *freeMemory;
SchemeHandlerOpen *open;
SchemeHandlerGet *get;
SchemeHandlerPut *put;
SchemeHandlerClose *close;
} SchemeHandler;
/*****************************************************************
MessageHandler
a structure for external message handlers. Such a handler, if set,
receives all error reports, displays them, keeps the log, the
error trace, etc.
*****************************************************************/
/*
define the "facility number" for Sablotron. This does not mean much
nowadays.
*/
#define MH_FACILITY_SABLOTRON 2
/* type for the error codes used by the message handler */
typedef unsigned long MH_ERROR;
/* logging levels for the message handler */
typedef enum
{
MH_LEVEL_DEBUG,
MH_LEVEL_INFO,
MH_LEVEL_WARN,
MH_LEVEL_ERROR,
MH_LEVEL_CRITICAL
} MH_LEVEL;
/*
makeCode()
makes the "external" error code to report with log() or error()
call with facility = module id; severity = 1 iff critical.
'code' is the error code internal to Sablotron.
*/
typedef MH_ERROR
MessageHandlerMakeCode(
void *userData, SablotHandle processor_,
int severity, unsigned short facility, unsigned short code);
/*
log()
pass code created by makeCode, level as necessary
fields is a NULL-terminated list of strings in form "field:contents"
distinguished fields include: msg, file, line, token
*/
typedef MH_ERROR
MessageHandlerLog(
void *userData, SablotHandle processor_,
MH_ERROR code, MH_LEVEL level, char **fields);
/*
error()
for reporting errors, meaning as with log()
*/
typedef MH_ERROR
MessageHandlerError(void *userData, SablotHandle processor_,
MH_ERROR code, MH_LEVEL level, char **fields);
/* the message handler structure. Use SablotRegMessageHandler() to register. */
typedef struct
{
MessageHandlerMakeCode *makeCode;
MessageHandlerLog *log;
MessageHandlerError *error;
} MessageHandler;
/*
SAXHandler
a SAX-like, streaming interface for access to XML docs
*/
#define SAX_RETURN void
typedef SAX_RETURN
SAXHandlerStartDocument(void* userData, SablotHandle processor_);
typedef SAX_RETURN
SAXHandlerStartElement(void* userData, SablotHandle processor_,
const char* name, const char** atts);
typedef SAX_RETURN
SAXHandlerEndElement(void* userData, SablotHandle processor_,
const char* name);
typedef SAX_RETURN
SAXHandlerStartNamespace(void* userData, SablotHandle processor_,
const char* prefix, const char* uri);
typedef SAX_RETURN
SAXHandlerEndNamespace(void* userData, SablotHandle processor_,
const char* prefix);
typedef SAX_RETURN
SAXHandlerComment(void* userData, SablotHandle processor_,
const char* contents);
typedef SAX_RETURN
SAXHandlerPI(void* userData, SablotHandle processor_,
const char* target, const char* contents);
typedef SAX_RETURN
SAXHandlerCharacters(void* userData, SablotHandle processor_,
const char* contents, int length);
typedef SAX_RETURN
SAXHandlerEndDocument(void* userData, SablotHandle processor_);
/*
The SAX handler structure. Use SablotRegSAXHandler() to register.
*/
typedef struct
{
SAXHandlerStartDocument *startDocument;
SAXHandlerStartElement *startElement;
SAXHandlerEndElement *endElement;
SAXHandlerStartNamespace *startNamespace;
SAXHandlerEndNamespace *endNamespace;
SAXHandlerComment *comment;
SAXHandlerPI *processingInstruction;
SAXHandlerCharacters *characters;
SAXHandlerEndDocument *endDocument;
} SAXHandler;
/*****************************************************************
MiscHandler
Collects miscellaneous callbacks.
*****************************************************************/
/*
documentInfo()
If set, this callback gets called after the output of a result
document is finished, giving information about its content type
and encoding.
*/
typedef void
MiscHandlerDocumentInfo(void* userData, SablotHandle processor_,
const char *contentType, const char *encoding);
/*
The Misc handler structure.
Use SablotRegHandler(HLR_MISC, ...) to register.
*/
typedef struct
{
MiscHandlerDocumentInfo *documentInfo;
} MiscHandler;
/*****************************************************************
EncHandler
Handler for recoding requests in absence of iconv.
*****************************************************************/
#define EH_FROM_UTF8 1
#define EH_TO_UTF8 0
/*
the conversion descriptor like iconv_t
*/
typedef void* EHDescriptor;
typedef enum
{
EH_OK,
EH_EINVAL,
EH_E2BIG,
EH_EILSEQ
} EHResult;
/*
open()
direction is either EH_FROM_UTF8 or EH_TO_UTF8
encoding is the other encoding
RETURN the descriptor, or -1 if the encoding is not supported
*/
typedef EHDescriptor EncHandlerOpen(void* userData, SablotHandle processor_,
int direction, const char *encoding);
/*
conv()
arguments 3 through 7 are just like for iconv, see the manpage
RETURN -1 on error (set errno), a different value (e.g. 0) if OK
*/
typedef EHResult EncHandlerConv(void* userData, SablotHandle processor_,
EHDescriptor cd, const char** inbuf, size_t *inbytesleft,
char ** outbuf, size_t *outbytesleft);
/*
close()
cd is the descriptor to close. Return 0 if OK, -1 on error.
*/
typedef int EncHandlerClose(void* userData, SablotHandle processor_,
EHDescriptor cd);
/*
The EncHandler structure.
Use SablotRegHandler(HLR_ENC, ...) to register.
*/
typedef struct
{
EncHandlerOpen *open;
EncHandlerConv *conv;
EncHandlerClose *close;
} EncHandler;
#endif