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shandler.h
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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