Annotation of XML/encoding.h, revision 1.22
1.1 daniel 1: /*
2: * encoding.h : interface for the encoding conversion functions needed for
3: * XML
4: *
5: * Related specs:
6: * rfc2044 (UTF-8 and UTF-16) F. Yergeau Alis Technologies
7: * [ISO-10646] UTF-8 and UTF-16 in Annexes
8: * [ISO-8859-1] ISO Latin-1 characters codes.
9: * [UNICODE] The Unicode Consortium, "The Unicode Standard --
10: * Worldwide Character Encoding -- Version 1.0", Addison-
11: * Wesley, Volume 1, 1991, Volume 2, 1992. UTF-8 is
12: * described in Unicode Technical Report #4.
13: * [US-ASCII] Coded Character Set--7-bit American Standard Code for
14: * Information Interchange, ANSI X3.4-1986.
15: *
16: * See Copyright for the status of this software.
17: *
18: * Daniel.Veillard@w3.org
19: */
20:
1.6 daniel 21: #ifndef __XML_CHAR_ENCODING_H__
22: #define __XML_CHAR_ENCODING_H__
1.1 daniel 23:
1.15 daniel 24: #include <libxml/xmlversion.h>
1.16 daniel 25: #ifdef LIBXML_ICONV_ENABLED
26: #include <iconv.h>
27: #endif
1.17 daniel 28: #include <libxml/tree.h>
1.16 daniel 29:
1.1 daniel 30: #ifdef __cplusplus
31: extern "C" {
32: #endif
33:
1.8 daniel 34: /**
35: * Predefined values for some standard encodings
1.16 daniel 36: * Libxml don't do beforehand translation on UTF8, ISOLatinX
37: * It also support UTF16 (LE and BE) by default.
38: *
39: * Anything else would have to be translated to UTF8 before being
40: * given to the parser itself. The BOM for UTF16 and the encoding
41: * declaration are looked at and a converter is looked for at that
42: * point. If not found the parser stops here as asked by the XML REC
43: * Converter can be registered by the user using xmlRegisterCharEncodingHandler
44: * but the currentl form doesn't allow stateful transcoding (a serious
45: * problem agreed !). If iconv has been found it will be used
46: * automatically and allow stateful transcoding, the simplest is then
47: * to be sure to enable icon and to provide iconv libs for the encoding
48: * support needed.
1.8 daniel 49: */
1.6 daniel 50: typedef enum {
51: XML_CHAR_ENCODING_ERROR= -1, /* No char encoding detected */
52: XML_CHAR_ENCODING_NONE= 0, /* No char encoding detected */
53: XML_CHAR_ENCODING_UTF8= 1, /* UTF-8 */
54: XML_CHAR_ENCODING_UTF16LE= 2, /* UTF-16 little endian */
55: XML_CHAR_ENCODING_UTF16BE= 3, /* UTF-16 big endian */
56: XML_CHAR_ENCODING_UCS4LE= 4, /* UCS-4 little endian */
57: XML_CHAR_ENCODING_UCS4BE= 5, /* UCS-4 big endian */
58: XML_CHAR_ENCODING_EBCDIC= 6, /* EBCDIC uh! */
59: XML_CHAR_ENCODING_UCS4_2143=7, /* UCS-4 unusual ordering */
60: XML_CHAR_ENCODING_UCS4_3412=8, /* UCS-4 unusual ordering */
61: XML_CHAR_ENCODING_UCS2= 9, /* UCS-2 */
62: XML_CHAR_ENCODING_8859_1= 10,/* ISO-8859-1 ISO Latin 1 */
63: XML_CHAR_ENCODING_8859_2= 11,/* ISO-8859-2 ISO Latin 2 */
64: XML_CHAR_ENCODING_8859_3= 12,/* ISO-8859-3 */
65: XML_CHAR_ENCODING_8859_4= 13,/* ISO-8859-4 */
66: XML_CHAR_ENCODING_8859_5= 14,/* ISO-8859-5 */
67: XML_CHAR_ENCODING_8859_6= 15,/* ISO-8859-6 */
68: XML_CHAR_ENCODING_8859_7= 16,/* ISO-8859-7 */
69: XML_CHAR_ENCODING_8859_8= 17,/* ISO-8859-8 */
70: XML_CHAR_ENCODING_8859_9= 18,/* ISO-8859-9 */
71: XML_CHAR_ENCODING_2022_JP= 19,/* ISO-2022-JP */
72: XML_CHAR_ENCODING_SHIFT_JIS=20,/* Shift_JIS */
1.21 veillard 73: XML_CHAR_ENCODING_EUC_JP= 21,/* EUC-JP */
74: XML_CHAR_ENCODING_ASCII= 22 /* pure ASCII */
1.6 daniel 75: } xmlCharEncoding;
76:
1.8 daniel 77: /**
78: * xmlCharEncodingInputFunc:
79: * @out: a pointer ot an array of bytes to store the UTF-8 result
80: * @outlen: the lenght of @out
81: * @in: a pointer ot an array of chars in the original encoding
82: * @inlen: the lenght of @in
83: *
84: * Take a block of chars in the original encoding and try to convert
85: * it to an UTF-8 block of chars out.
86: *
1.17 daniel 87: * Returns the number of byte written, or -1 by lack of space, or -2
88: * if the transcoding failed.
1.18 daniel 89: * The value of @inlen after return is the number of octets consumed
90: * as the return value is positive, else unpredictiable.
91: * The value of @outlen after return is the number of ocetes consumed.
1.8 daniel 92: */
1.18 daniel 93: typedef int (* xmlCharEncodingInputFunc)(unsigned char* out, int *outlen,
1.14 daniel 94: const unsigned char* in, int *inlen);
1.8 daniel 95:
96:
97: /**
1.14 daniel 98: * xmlCharEncodingOutputFunc:
1.8 daniel 99: * @out: a pointer ot an array of bytes to store the result
100: * @outlen: the lenght of @out
101: * @in: a pointer ot an array of UTF-8 chars
102: * @inlen: the lenght of @in
103: *
104: * Take a block of UTF-8 chars in and try to convert it to an other
105: * encoding.
1.19 daniel 106: * Note: a first call designed to produce heading info is called with
107: * in = NULL. If stateful this should also initialize the encoder state
1.8 daniel 108: *
109: * Returns the number of byte written, or -1 by lack of space, or -2
110: * if the transcoding failed.
1.18 daniel 111: * The value of @inlen after return is the number of octets consumed
112: * as the return value is positive, else unpredictiable.
113: * The value of @outlen after return is the number of ocetes consumed.
1.8 daniel 114: */
1.18 daniel 115: typedef int (* xmlCharEncodingOutputFunc)(unsigned char* out, int *outlen,
1.14 daniel 116: const unsigned char* in, int *inlen);
1.8 daniel 117:
1.16 daniel 118:
1.8 daniel 119: /*
120: * Block defining the handlers for non UTF-8 encodings.
1.16 daniel 121: * If iconv is supported, there is two extra fields
1.8 daniel 122: */
123:
1.11 daniel 124: typedef struct _xmlCharEncodingHandler xmlCharEncodingHandler;
125: typedef xmlCharEncodingHandler *xmlCharEncodingHandlerPtr;
126: struct _xmlCharEncodingHandler {
1.8 daniel 127: char *name;
128: xmlCharEncodingInputFunc input;
1.16 daniel 129: xmlCharEncodingOutputFunc output;
130: #ifdef LIBXML_ICONV_ENABLED
131: iconv_t iconv_in;
132: iconv_t iconv_out;
133: #endif /* LIBXML_ICONV_ENABLED */
1.11 daniel 134: };
1.8 daniel 135:
1.22 ! veillard 136: /*
! 137: * Interfaces for encoding handlers
! 138: */
1.10 daniel 139: void xmlInitCharEncodingHandlers (void);
140: void xmlCleanupCharEncodingHandlers (void);
141: void xmlRegisterCharEncodingHandler (xmlCharEncodingHandlerPtr handler);
1.22 ! veillard 142: xmlCharEncodingHandlerPtr
! 143: xmlGetCharEncodingHandler (xmlCharEncoding enc);
! 144: xmlCharEncodingHandlerPtr
! 145: xmlFindCharEncodingHandler (const char *name);
! 146:
! 147:
! 148: /*
! 149: * Interfaces for encoding names and aliases
! 150: */
! 151: int xmlAddEncodingAlias (const char *name,
! 152: const char *alias);
! 153: int xmlDelEncodingAlias (const char *alias);
! 154: const char *
! 155: xmlGetEncodingAlias (const char *alias);
! 156: void xmlCleanupEncodingAliases (void);
! 157: xmlCharEncoding
! 158: xmlParseCharEncoding (const char* name);
! 159: const char*
! 160: xmlGetCharEncodingName (xmlCharEncoding enc);
! 161:
! 162: /*
! 163: * Interfaces directly used by the parsers.
! 164: */
! 165: xmlCharEncoding
! 166: xmlDetectCharEncoding (const unsigned char* in,
1.14 daniel 167: int len);
1.22 ! veillard 168:
1.12 daniel 169: int xmlCheckUTF8 (const unsigned char *utf);
1.8 daniel 170:
1.16 daniel 171: int xmlCharEncOutFunc (xmlCharEncodingHandler *handler,
1.17 daniel 172: xmlBufferPtr out,
173: xmlBufferPtr in);
1.16 daniel 174:
175: int xmlCharEncInFunc (xmlCharEncodingHandler *handler,
1.20 daniel 176: xmlBufferPtr out,
177: xmlBufferPtr in);
178: int xmlCharEncFirstLine (xmlCharEncodingHandler *handler,
1.17 daniel 179: xmlBufferPtr out,
180: xmlBufferPtr in);
1.16 daniel 181: int xmlCharEncCloseFunc (xmlCharEncodingHandler *handler);
1.6 daniel 182:
1.1 daniel 183: #ifdef __cplusplus
184: }
185: #endif
186:
1.6 daniel 187: #endif /* __XML_CHAR_ENCODING_H__ */
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