/*
 * Summary: interface for the I/O interfaces used by the parser
 * Description: interface for the I/O interfaces used by the parser
 *
 * Copy: See Copyright for the status of this software.
 *
 * Author: Daniel Veillard
 */

#ifndef __XML_IO_H__
#define __XML_IO_H__

#include <stdio.h>
#include "xmlversion.h"

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Those are the functions and datatypes for the parser input
 * I/O structures.
 */

/**
 * xmlInputMatchCallback:
 * @filename: the filename or URI
 *
 * Callback used in the I/O Input API to detect if the current handler 
 * can provide input fonctionnalities for this resource.
 *
 * Returns 1 if yes and 0 if another Input module should be used
 */
typedef int (XMLCALL *xmlInputMatchCallback) (char const *filename);
/**
 * xmlInputOpenCallback:
 * @filename: the filename or URI
 *
 * Callback used in the I/O Input API to open the resource
 *
 * Returns an Input context or NULL in case or error
 */
typedef void * (XMLCALL *xmlInputOpenCallback) (char const *filename);
/**
 * xmlInputReadCallback:
 * @context:  an Input context
 * @buffer:  the buffer to store data read
 * @len:  the length of the buffer in bytes
 *
 * Callback used in the I/O Input API to read the resource
 *
 * Returns the number of bytes read or -1 in case of error
 */
typedef int (XMLCALL *xmlInputReadCallback) (void * context, char * buffer, int len);
/**
 * xmlInputCloseCallback:
 * @context:  an Input context
 *
 * Callback used in the I/O Input API to close the resource
 *
 * Returns 0 or -1 in case of error
 */
typedef int (XMLCALL *xmlInputCloseCallback) (void * context);

#ifdef LIBXML_OUTPUT_ENABLED
/*
 * Those are the functions and datatypes for the library output
 * I/O structures.
 */

/**
 * xmlOutputMatchCallback:
 * @filename: the filename or URI
 *
 * Callback used in the I/O Output API to detect if the current handler 
 * can provide output fonctionnalities for this resource.
 *
 * Returns 1 if yes and 0 if another Output module should be used
 */
typedef int (XMLCALL *xmlOutputMatchCallback) (char const *filename);
/**
 * xmlOutputOpenCallback:
 * @filename: the filename or URI
 *
 * Callback used in the I/O Output API to open the resource
 *
 * Returns an Output context or NULL in case or error
 */
typedef void * (XMLCALL *xmlOutputOpenCallback) (char const *filename);
/**
 * xmlOutputWriteCallback:
 * @context:  an Output context
 * @buffer:  the buffer of data to write
 * @len:  the length of the buffer in bytes
 *
 * Callback used in the I/O Output API to write to the resource
 *
 * Returns the number of bytes written or -1 in case of error
 */
typedef int (XMLCALL *xmlOutputWriteCallback) (void * context, const char * buffer,
                                       int len);
/**
 * xmlOutputCloseCallback:
 * @context:  an Output context
 *
 * Callback used in the I/O Output API to close the resource
 *
 * Returns 0 or -1 in case of error
 */
typedef int (XMLCALL *xmlOutputCloseCallback) (void * context);
#endif /* LIBXML_OUTPUT_ENABLED */

#ifdef __cplusplus
}
#endif

#include "globals.h"
#include "tree.h"
#include "parser.h"
#include "encoding.h"

#ifdef __cplusplus
extern "C" {
#endif
struct _xmlParserInputBuffer {
    void*                  context;
    xmlInputReadCallback   readcallback;
    xmlInputCloseCallback  closecallback;
    
    xmlCharEncodingHandlerPtr encoder; /* I18N conversions to UTF-8 */
    
    xmlBufferPtr buffer;    /* Local buffer encoded in UTF-8 */
    xmlBufferPtr raw;       /* if encoder != NULL buffer for raw input */
    int compressed;         /* -1=unknown, 0=not compressed, 1=compressed */
    int error;
    unsigned long rawconsumed;/* amount consumed from raw */
};


#ifdef LIBXML_OUTPUT_ENABLED
struct _xmlOutputBuffer {
    void*                   context;
    xmlOutputWriteCallback  writecallback;
    xmlOutputCloseCallback  closecallback;
    
    xmlCharEncodingHandlerPtr encoder; /* I18N conversions to UTF-8 */
    
    xmlBufferPtr buffer;    /* Local buffer encoded in UTF-8 or ISOLatin */
    xmlBufferPtr conv;      /* if encoder != NULL buffer for output */
    int written;            /* total number of byte written */
    int error;
};
#endif /* LIBXML_OUTPUT_ENABLED */

/*
 * Interfaces for input
 */
XMLPUBFUN void XMLCALL  
        xmlCleanupInputCallbacks                (void);

XMLPUBFUN int XMLCALL
        xmlPopInputCallbacks                    (void);

XMLPUBFUN void XMLCALL  
        xmlRegisterDefaultInputCallbacks        (void);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlAllocParserInputBuffer               (xmlCharEncoding enc);

XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateFilename      (const char *URI,
                                                 xmlCharEncoding enc);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateFile          (FILE *file,
                                                 xmlCharEncoding enc);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateFd            (int fd,
                                                 xmlCharEncoding enc);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateMem           (const char *mem, int size,
                                                 xmlCharEncoding enc);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateStatic        (const char *mem, int size,
                                                 xmlCharEncoding enc);
XMLPUBFUN xmlParserInputBufferPtr XMLCALL
        xmlParserInputBufferCreateIO            (xmlInputReadCallback   ioread,
                                                 xmlInputCloseCallback  ioclose,
                                                 void *ioctx,
                                                 xmlCharEncoding enc);
XMLPUBFUN int XMLCALL   
        xmlParserInputBufferRead                (xmlParserInputBufferPtr in,
                                                 int len);
XMLPUBFUN int XMLCALL   
        xmlParserInputBufferGrow                (xmlParserInputBufferPtr in,
                                                 int len);
XMLPUBFUN int XMLCALL   
        xmlParserInputBufferPush                (xmlParserInputBufferPtr in,
                                                 int len,
                                                 const char *buf);
XMLPUBFUN void XMLCALL  
        xmlFreeParserInputBuffer                (xmlParserInputBufferPtr in);
XMLPUBFUN char * XMLCALL        
        xmlParserGetDirectory                   (const char *filename);

XMLPUBFUN int XMLCALL     
        xmlRegisterInputCallbacks               (xmlInputMatchCallback matchFunc,
                                                 xmlInputOpenCallback openFunc,
                                                 xmlInputReadCallback readFunc,
                                                 xmlInputCloseCallback closeFunc);

xmlParserInputBufferPtr
        __xmlParserInputBufferCreateFilename(const char *URI,
                                                                                xmlCharEncoding enc);

#ifdef LIBXML_OUTPUT_ENABLED
/*
 * Interfaces for output
 */
XMLPUBFUN void XMLCALL  
        xmlCleanupOutputCallbacks               (void);
XMLPUBFUN void XMLCALL  
        xmlRegisterDefaultOutputCallbacks(void);
XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlAllocOutputBuffer            (xmlCharEncodingHandlerPtr encoder);

XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlOutputBufferCreateFilename   (const char *URI,
                                         xmlCharEncodingHandlerPtr encoder,
                                         int compression);

XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlOutputBufferCreateFile       (FILE *file,
                                         xmlCharEncodingHandlerPtr encoder);

XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlOutputBufferCreateBuffer     (xmlBufferPtr buffer,
                                         xmlCharEncodingHandlerPtr encoder);

XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlOutputBufferCreateFd         (int fd,
                                         xmlCharEncodingHandlerPtr encoder);

XMLPUBFUN xmlOutputBufferPtr XMLCALL
        xmlOutputBufferCreateIO         (xmlOutputWriteCallback   iowrite,
                                         xmlOutputCloseCallback  ioclose,
                                         void *ioctx,
                                         xmlCharEncodingHandlerPtr encoder);

XMLPUBFUN int XMLCALL   
        xmlOutputBufferWrite            (xmlOutputBufferPtr out,
                                         int len,
                                         const char *buf);
XMLPUBFUN int XMLCALL   
        xmlOutputBufferWriteString      (xmlOutputBufferPtr out,
                                         const char *str);
XMLPUBFUN int XMLCALL   
        xmlOutputBufferWriteEscape      (xmlOutputBufferPtr out,
                                         const xmlChar *str,
                                         xmlCharEncodingOutputFunc escaping);

XMLPUBFUN int XMLCALL   
        xmlOutputBufferFlush            (xmlOutputBufferPtr out);
XMLPUBFUN int XMLCALL   
        xmlOutputBufferClose            (xmlOutputBufferPtr out);

XMLPUBFUN int XMLCALL     
        xmlRegisterOutputCallbacks      (xmlOutputMatchCallback matchFunc,
                                         xmlOutputOpenCallback openFunc,
                                         xmlOutputWriteCallback writeFunc,
                                         xmlOutputCloseCallback closeFunc);

xmlOutputBufferPtr
        __xmlOutputBufferCreateFilename(const char *URI,
                              xmlCharEncodingHandlerPtr encoder,
                              int compression);

#ifdef LIBXML_HTTP_ENABLED
/*  This function only exists if HTTP support built into the library  */
XMLPUBFUN void XMLCALL  
        xmlRegisterHTTPPostCallbacks    (void );
#endif /* LIBXML_HTTP_ENABLED */
        
#endif /* LIBXML_OUTPUT_ENABLED */

XMLPUBFUN xmlParserInputPtr XMLCALL
        xmlCheckHTTPInput               (xmlParserCtxtPtr ctxt,
                                         xmlParserInputPtr ret);

/*
 * A predefined entity loader disabling network accesses
 */
XMLPUBFUN xmlParserInputPtr XMLCALL 
        xmlNoNetExternalEntityLoader    (const char *URL,
                                         const char *ID,
                                         xmlParserCtxtPtr ctxt);

/* 
 * xmlNormalizeWindowsPath is obsolete, don't use it. 
 * Check xmlCanonicPath in uri.h for a better alternative.
 */
XMLPUBFUN xmlChar * XMLCALL 
        xmlNormalizeWindowsPath         (const xmlChar *path);

XMLPUBFUN int XMLCALL   
        xmlCheckFilename                (const char *path);
/**
 * Default 'file://' protocol callbacks 
 */
XMLPUBFUN int XMLCALL   
        xmlFileMatch                    (const char *filename);
XMLPUBFUN void * XMLCALL        
        xmlFileOpen                     (const char *filename);
XMLPUBFUN int XMLCALL   
        xmlFileRead                     (void * context, 
                                         char * buffer, 
                                         int len);
XMLPUBFUN int XMLCALL   
        xmlFileClose                    (void * context);

/**
 * Default 'http://' protocol callbacks 
 */
#ifdef LIBXML_HTTP_ENABLED
XMLPUBFUN int XMLCALL   
        xmlIOHTTPMatch                  (const char *filename);
XMLPUBFUN void * XMLCALL        
        xmlIOHTTPOpen                   (const char *filename);
#ifdef LIBXML_OUTPUT_ENABLED
XMLPUBFUN void * XMLCALL        
        xmlIOHTTPOpenW                  (const char * post_uri,
                                         int   compression );
#endif /* LIBXML_OUTPUT_ENABLED */
XMLPUBFUN int XMLCALL   
        xmlIOHTTPRead                   (void * context, 
                                         char * buffer, 
                                         int len);
XMLPUBFUN int XMLCALL   
        xmlIOHTTPClose                  (void * context);
#endif /* LIBXML_HTTP_ENABLED */

/**
 * Default 'ftp://' protocol callbacks 
 */
#ifdef LIBXML_FTP_ENABLED 
XMLPUBFUN int XMLCALL   
        xmlIOFTPMatch                   (const char *filename);
XMLPUBFUN void * XMLCALL        
        xmlIOFTPOpen                    (const char *filename);
XMLPUBFUN int XMLCALL   
        xmlIOFTPRead                    (void * context, 
                                         char * buffer, 
                                         int len);
XMLPUBFUN int XMLCALL   
        xmlIOFTPClose                   (void * context);
#endif /* LIBXML_FTP_ENABLED */

#ifdef __cplusplus
}
#endif

#endif /* __XML_IO_H__ */
