Viewing file:  encoding.h (8.31 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Summary: interface for the encoding conversion functions
* Description: interface for the encoding conversion functions needed for
* XML basic encoding and iconv() support.
*
* Related specs are
* rfc2044 (UTF-8 and UTF-16) F. Yergeau Alis Technologies
* [ISO-10646] UTF-8 and UTF-16 in Annexes
* [ISO-8859-1] ISO Latin-1 characters codes.
* [UNICODE] The Unicode Consortium, "The Unicode Standard --
* Worldwide Character Encoding -- Version 1.0", Addison-
* Wesley, Volume 1, 1991, Volume 2, 1992. UTF-8 is
* described in Unicode Technical Report #4.
* [US-ASCII] Coded Character Set--7-bit American Standard Code for
* Information Interchange, ANSI X3.4-1986.
*
* Copy: See Copyright for the status of this software.
*
* Author: Daniel Veillard
*/
#ifndef __XML_CHAR_ENCODING_H__
#define __XML_CHAR_ENCODING_H__
#include <libxml/xmlversion.h>
#ifdef LIBXML_ICONV_ENABLED
#include <iconv.h>
#endif
#ifdef LIBXML_ICU_ENABLED
#include <unicode/ucnv.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* xmlCharEncoding:
*
* Predefined values for some standard encodings.
* Libxml does not do beforehand translation on UTF8 and ISOLatinX.
* It also supports ASCII, ISO-8859-1, and UTF16 (LE and BE) by default.
*
* Anything else would have to be translated to UTF8 before being
* given to the parser itself. The BOM for UTF16 and the encoding
* declaration are looked at and a converter is looked for at that
* point. If not found the parser stops here as asked by the XML REC. A
* converter can be registered by the user using xmlRegisterCharEncodingHandler
* but the current form doesn't allow stateful transcoding (a serious
* problem agreed !). If iconv has been found it will be used
* automatically and allow stateful transcoding, the simplest is then
* to be sure to enable iconv and to provide iconv libs for the encoding
* support needed.
*
* Note that the generic "UTF-16" is not a predefined value. Instead, only
* the specific UTF-16LE and UTF-16BE are present.
*/
typedef enum {
XML_CHAR_ENCODING_ERROR= -1, /* No char encoding detected */
XML_CHAR_ENCODING_NONE= 0, /* No char encoding detected */
XML_CHAR_ENCODING_UTF8= 1, /* UTF-8 */
XML_CHAR_ENCODING_UTF16LE= 2, /* UTF-16 little endian */
XML_CHAR_ENCODING_UTF16BE= 3, /* UTF-16 big endian */
XML_CHAR_ENCODING_UCS4LE= 4, /* UCS-4 little endian */
XML_CHAR_ENCODING_UCS4BE= 5, /* UCS-4 big endian */
XML_CHAR_ENCODING_EBCDIC= 6, /* EBCDIC uh! */
XML_CHAR_ENCODING_UCS4_2143=7, /* UCS-4 unusual ordering */
XML_CHAR_ENCODING_UCS4_3412=8, /* UCS-4 unusual ordering */
XML_CHAR_ENCODING_UCS2= 9, /* UCS-2 */
XML_CHAR_ENCODING_8859_1= 10,/* ISO-8859-1 ISO Latin 1 */
XML_CHAR_ENCODING_8859_2= 11,/* ISO-8859-2 ISO Latin 2 */
XML_CHAR_ENCODING_8859_3= 12,/* ISO-8859-3 */
XML_CHAR_ENCODING_8859_4= 13,/* ISO-8859-4 */
XML_CHAR_ENCODING_8859_5= 14,/* ISO-8859-5 */
XML_CHAR_ENCODING_8859_6= 15,/* ISO-8859-6 */
XML_CHAR_ENCODING_8859_7= 16,/* ISO-8859-7 */
XML_CHAR_ENCODING_8859_8= 17,/* ISO-8859-8 */
XML_CHAR_ENCODING_8859_9= 18,/* ISO-8859-9 */
XML_CHAR_ENCODING_2022_JP= 19,/* ISO-2022-JP */
XML_CHAR_ENCODING_SHIFT_JIS=20,/* Shift_JIS */
XML_CHAR_ENCODING_EUC_JP= 21,/* EUC-JP */
XML_CHAR_ENCODING_ASCII= 22 /* pure ASCII */
} xmlCharEncoding;
/**
* xmlCharEncodingInputFunc:
* @out: a pointer to an array of bytes to store the UTF-8 result
* @outlen: the length of @out
* @in: a pointer to an array of chars in the original encoding
* @inlen: the length of @in
*
* Take a block of chars in the original encoding and try to convert
* it to an UTF-8 block of chars out.
*
* Returns the number of bytes written, -1 if lack of space, or -2
* if the transcoding failed.
* The value of @inlen after return is the number of octets consumed
* if the return value is positive, else unpredictiable.
* The value of @outlen after return is the number of octets consumed.
*/
typedef int (* xmlCharEncodingInputFunc)(unsigned char *out, int *outlen,
const unsigned char *in, int *inlen);
/**
* xmlCharEncodingOutputFunc:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of UTF-8 chars
* @inlen: the length of @in
*
* Take a block of UTF-8 chars in and try to convert it to another
* encoding.
* Note: a first call designed to produce heading info is called with
* in = NULL. If stateful this should also initialize the encoder state.
*
* Returns the number of bytes written, -1 if lack of space, or -2
* if the transcoding failed.
* The value of @inlen after return is the number of octets consumed
* if the return value is positive, else unpredictiable.
* The value of @outlen after return is the number of octets produced.
*/
typedef int (* xmlCharEncodingOutputFunc)(unsigned char *out, int *outlen,
const unsigned char *in, int *inlen);
/*
* Block defining the handlers for non UTF-8 encodings.
* If iconv is supported, there are two extra fields.
*/
#ifdef LIBXML_ICU_ENABLED
/* Size of pivot buffer, same as icu/source/common/ucnv.cpp CHUNK_SIZE */
#define ICU_PIVOT_BUF_SIZE 1024
struct _uconv_t {
UConverter *uconv; /* for conversion between an encoding and UTF-16 */
UConverter *utf8; /* for conversion between UTF-8 and UTF-16 */
UChar pivot_buf[ICU_PIVOT_BUF_SIZE];
UChar *pivot_source;
UChar *pivot_target;
};
typedef struct _uconv_t uconv_t;
#endif
typedef struct _xmlCharEncodingHandler xmlCharEncodingHandler;
typedef xmlCharEncodingHandler *xmlCharEncodingHandlerPtr;
struct _xmlCharEncodingHandler {
char *name;
xmlCharEncodingInputFunc input;
xmlCharEncodingOutputFunc output;
#ifdef LIBXML_ICONV_ENABLED
iconv_t iconv_in;
iconv_t iconv_out;
#endif /* LIBXML_ICONV_ENABLED */
#ifdef LIBXML_ICU_ENABLED
uconv_t *uconv_in;
uconv_t *uconv_out;
#endif /* LIBXML_ICU_ENABLED */
};
#ifdef __cplusplus
}
#endif
#include <libxml/tree.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Interfaces for encoding handlers.
*/
XMLPUBFUN void XMLCALL
xmlInitCharEncodingHandlers (void);
XMLPUBFUN void XMLCALL
xmlCleanupCharEncodingHandlers (void);
XMLPUBFUN void XMLCALL
xmlRegisterCharEncodingHandler (xmlCharEncodingHandlerPtr handler);
XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
xmlGetCharEncodingHandler (xmlCharEncoding enc);
XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
xmlFindCharEncodingHandler (const char *name);
XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
xmlNewCharEncodingHandler (const char *name,
xmlCharEncodingInputFunc input,
xmlCharEncodingOutputFunc output);
/*
* Interfaces for encoding names and aliases.
*/
XMLPUBFUN int XMLCALL
xmlAddEncodingAlias (const char *name,
const char *alias);
XMLPUBFUN int XMLCALL
xmlDelEncodingAlias (const char *alias);
XMLPUBFUN const char * XMLCALL
xmlGetEncodingAlias (const char *alias);
XMLPUBFUN void XMLCALL
xmlCleanupEncodingAliases (void);
XMLPUBFUN xmlCharEncoding XMLCALL
xmlParseCharEncoding (const char *name);
XMLPUBFUN const char * XMLCALL
xmlGetCharEncodingName (xmlCharEncoding enc);
/*
* Interfaces directly used by the parsers.
*/
XMLPUBFUN xmlCharEncoding XMLCALL
xmlDetectCharEncoding (const unsigned char *in,
int len);
XMLPUBFUN int XMLCALL
xmlCharEncOutFunc (xmlCharEncodingHandler *handler,
xmlBufferPtr out,
xmlBufferPtr in);
XMLPUBFUN int XMLCALL
xmlCharEncInFunc (xmlCharEncodingHandler *handler,
xmlBufferPtr out,
xmlBufferPtr in);
XMLPUBFUN int XMLCALL
xmlCharEncFirstLine (xmlCharEncodingHandler *handler,
xmlBufferPtr out,
xmlBufferPtr in);
XMLPUBFUN int XMLCALL
xmlCharEncCloseFunc (xmlCharEncodingHandler *handler);
/*
* Export a few useful functions
*/
#ifdef LIBXML_OUTPUT_ENABLED
XMLPUBFUN int XMLCALL
UTF8Toisolat1 (unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen);
#endif /* LIBXML_OUTPUT_ENABLED */
XMLPUBFUN int XMLCALL
isolat1ToUTF8 (unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen);
#ifdef __cplusplus
}
#endif
#endif /* __XML_CHAR_ENCODING_H__ */
|