/*
* encoding.c : implements the encoding conversion functions needed for XML
*
* Related specs:
* 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.
*
* Original code for IsoLatin1 and UTF-16 by "Martin J. Duerst" <duerst@w3.org>
*
* See Copyright for the status of this software.
*
* Daniel.Veillard@w3.org
*/
#ifdef WIN32
#include "win32config.h"
#else
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include "encoding.h"
#include "xmlmemory.h"
xmlCharEncodingHandlerPtr xmlUTF16LEHandler = NULL;
xmlCharEncodingHandlerPtr xmlUTF16BEHandler = NULL;
/*
* From rfc2044: encoding of the Unicode values on UTF-8:
*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*
* I hope we won't use values > 0xFFFF anytime soon !
*/
/**
* xmlCheckUTF8: Check utf-8 string for legality.
* @utf: Pointer to putative utf-8 encoded string.
*
* Checks @utf for being valid utf-8. @utf is assumed to be
* null-terminated. This function is not super-strict, as it will
* allow longer utf-8 sequences than necessary. Note that Java is
* capable of producing these sequences if provoked. Also note, this
* routine checks for the 4-byte maxiumum size, but does not check for
* 0x10ffff maximum value.
*
* Return value: true if @utf is valid.
**/
int
xmlCheckUTF8(const unsigned char *utf)
{
int ix;
unsigned char c;
for (ix = 0; (c = utf[ix]);) {
if (c & 0x80) {
if ((utf[ix + 1] & 0xc0) != 0x80)
return(0);
if ((c & 0xe0) == 0xe0) {
if ((utf[ix + 2] & 0xc0) != 0x80)
return(0);
if ((c & 0xf0) == 0xf0) {
if ((c & 0xf8) != 0xf0 || (utf[ix + 3] & 0xc0) != 0x80)
return(0);
ix += 4;
/* 4-byte code */
} else
/* 3-byte code */
ix += 3;
} else
/* 2-byte code */
ix += 2;
} else
/* 1-byte code */
ix++;
}
return(1);
}
/**
* isolat1ToUTF8:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of ISO Latin 1 chars
* @inlen: the length of @in
*
* Take a block of ISO Latin 1 chars in and try to convert it to an UTF-8
* block of chars out.
* Returns the number of byte written, or -1 by lack of space.
*/
int
isolat1ToUTF8(unsigned char* out, int outlen,
const unsigned char* in, int *inlen) {
unsigned char* outstart= out;
unsigned char* outend= out+outlen;
const unsigned char* inend= in+*inlen;
unsigned char c;
while (in < inend) {
c= *in++;
if (c < 0x80) {
if (out >= outend) return(-1);
*out++ = c;
}
else {
if (out >= outend) return(-1);
*out++ = 0xC0 | (c >> 6);
if (out >= outend) return(-1);
*out++ = 0x80 | (0x3F & c);
}
}
return(out-outstart);
}
/**
* UTF8Toisolat1:
* @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 an ISO Latin 1
* block of chars out.
* TODO: UTF8Toisolat1 need a fallback mechanism ...
*
* Returns the number of byte written, or -1 by lack of space, or -2
* if the transcoding fails (for *in is not valid utf8 string or
* the result of transformation can't fit into the encoding we want)
* The value of @inlen after return is the number of octets consumed
* as the return value is positive, else unpredictiable.
*/
int
UTF8Toisolat1(unsigned char* out, int outlen,
const unsigned char* in, int *inlen) {
unsigned char* outstart= out;
unsigned char* outend= out+outlen;
const unsigned char* inend= in+*inlen;
unsigned char c;
while (in < inend) {
c= *in++;
if (c < 0x80) {
if (out >= outend) return(-1);
*out++= c;
}
else if (in == inend) {
*inlen -= 1;
break;
}
else if (((c & 0xFC) == 0xC0) && ((*in & 0xC0) == 0x80)) {
/* a two byte utf-8 and can be encoding as isolate1 */
*out++= ((c & 0x03) << 6) | (*in++ & 0x3F);
}
else
return(-2);
/* TODO : some should be represent as "&#x____;" */
}
return(out-outstart);
}
/**
* UTF16LEToUTF8:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @inb: a pointer to an array of UTF-16LE passwd as a byte array
* @inlenb: the length of @in in UTF-16LE chars
*
* Take a block of UTF-16LE ushorts in and try to convert it to an UTF-8
* block of chars out. This function assume the endian properity
* is the same between the native type of this machine and the
* inputed one.
*
* Returns the number of byte written, or -1 by lack of space, or -2
* if the transcoding fails (for *in is not valid utf16 string)
* The value of *inlen after return is the number of octets consumed
* as the return value is positive, else unpredictiable.
*/
int
UTF16LEToUTF8(unsigned char* out, int outlen,
const unsigned char* inb, int *inlenb)
{
unsigned char* outstart= out;
unsigned char* outend= out+outlen;
unsigned short* in = (unsigned short*) inb;
unsigned short* inend;
unsigned int c, d, inlen;
unsigned char *tmp;
int bits;
if ((*inlenb % 2) == 1)
(*inlenb)--;
inlen = *inlenb / 2;
inend= in + inlen;
while (in < inend) {
#ifdef BIG_ENDIAN
tmp = (unsigned char *) in;
c = *tmp++;
c = c | (((unsigned int)*tmp) << 8);
in++;
#else /* BIG_ENDIAN */
c= *in++;
#endif /* BIG_ENDIAN */
if ((c & 0xFC00) == 0xD800) { /* surrogates */
if (in >= inend) { /* (in > inend) shouldn't happens */
(*inlenb) -= 2;
break;
}
#ifdef BIG_ENDIAN
tmp = (unsigned char *) in;
d = *tmp++;
d = d | (((unsigned int)*tmp) << 8);
in++;
#else /* BIG_ENDIAN */
d = *in++;
#endif /* BIG_ENDIAN */
if ((d & 0xFC00) == 0xDC00) {
c &= 0x03FF;
c <<= 10;
c |= d & 0x03FF;
c += 0x10000;
}
else
return(-2);
}
/* assertion: c is a single UTF-4 value */
if (out >= outend)
return(-1);
if (c < 0x80) { *out++= c; bits= -6; }
else if (c < 0x800) { *out++= ((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000) { *out++= ((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else { *out++= ((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
if (out >= outend)
return(-1);
*out++= ((c >> bits) & 0x3F) | 0x80;
}
}
return(out-outstart);
}
/**
* UTF8ToUTF16LE:
* @outb: a pointer to an array of bytes to store the result
* @outlen: the length of @outb
* @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 an UTF-16LE
* block of chars out.
* TODO: UTF8ToUTF16LE need a fallback mechanism ...
*
* Returns the number of byte written, or -1 by lack of space, or -2
* if the transcoding failed.
*/
int
UTF8ToUTF16LE(unsigned char* outb, int outlen,
const unsigned char* in, int *inlen)
{
unsigned short* out = (unsigned short*) outb;
unsigned short* outstart= out;
unsigned short* outend;
const unsigned char* inend= in+*inlen;
unsigned int c, d, trailing;
#ifdef BIG_ENDIAN
unsigned char *tmp;
unsigned short tmp1, tmp2;
#endif /* BIG_ENDIAN */
outlen /= 2; /* convert in short length */
outend = out + outlen;
while (in < inend) {
d= *in++;
if (d < 0x80) { c= d; trailing= 0; }
else if (d < 0xC0)
return(-2); /* trailing byte in leading position */
else if (d < 0xE0) { c= d & 0x1F; trailing= 1; }
else if (d < 0xF0) { c= d & 0x0F; trailing= 2; }
else if (d < 0xF8) { c= d & 0x07; trailing= 3; }
else
return(-2); /* no chance for this in UTF-16 */
if (inend - in < trailing) {
*inlen -= (inend - in);
break;
}
for ( ; trailing; trailing--) {
if ((in >= inend) || (((d= *in++) & 0xC0) != 0x80))
return(-1);
c <<= 6;
c |= d & 0x3F;
}
/* assertion: c is a single UTF-4 value */
if (c < 0x10000) {
if (out >= outend)
return(-1);
#ifdef BIG_ENDIAN
tmp = (unsigned char *) out;
*tmp = c ;
*(tmp + 1) = c >> 8 ;
out++;
#else /* BIG_ENDIAN */
*out++ = c;
#endif /* BIG_ENDIAN */
}
else if (c < 0x110000) {
if (out+1 >= outend)
return(-1);
c -= 0x10000;
#ifdef BIG_ENDIAN
tmp1 = 0xD800 | (c >> 10);
tmp = (unsigned char *) out;
*tmp = tmp1;
*(tmp + 1) = tmp1 >> 8;
out++;
tmp2 = 0xDC00 | (c & 0x03FF);
tmp = (unsigned char *) out;
*tmp = tmp2;
*(tmp + 1) = tmp2 >> 8;
out++;
#else /* BIG_ENDIAN */
*out++ = 0xD800 | (c >> 10);
*out++ = 0xDC00 | (c & 0x03FF);
#endif /* BIG_ENDIAN */
}
else
return(-1);
}
return(out-outstart);
}
/**
* UTF16BEToUTF8:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @inb: a pointer to an array of UTF-16 passwd as a byte array
* @inlenb: the length of @in in UTF-16 chars
*
* Take a block of UTF-16 ushorts in and try to convert it to an UTF-8
* block of chars out. This function assume the endian properity
* is the same between the native type of this machine and the
* inputed one.
*
* Returns the number of byte written, or -1 by lack of space, or -2
* if the transcoding fails (for *in is not valid utf16 string)
* The value of *inlen after return is the number of octets consumed
* as the return value is positive, else unpredictiable.
*/
int
UTF16BEToUTF8(unsigned char* out, int outlen,
const unsigned char* inb, int *inlenb)
{
unsigned char* outstart= out;
unsigned char* outend= out+outlen;
unsigned short* in = (unsigned short*) inb;
unsigned short* inend;
unsigned int c, d, inlen;
#ifdef BIG_ENDIAN
#else /* BIG_ENDIAN */
unsigned char *tmp;
#endif /* BIG_ENDIAN */
int bits;
if ((*inlenb % 2) == 1)
(*inlenb)--;
inlen = *inlenb / 2;
inend= in + inlen;
while (in < inend) {
#ifdef BIG_ENDIAN
c= *in++;
#else
tmp = (unsigned char *) in;
c = *tmp++;
c = c << 8;
c = c | (unsigned int) *tmp;
in++;
#endif
if ((c & 0xFC00) == 0xD800) { /* surrogates */
if (in >= inend) { /* (in > inend) shouldn't happens */
(*inlenb) -= 2;
break;
}
#ifdef BIG_ENDIAN
d= *in++;
#else
tmp = (unsigned char *) in;
d = *tmp++;
d = d << 8;
d = d | (unsigned int) *tmp;
in++;
#endif
if ((d & 0xFC00) == 0xDC00) {
c &= 0x03FF;
c <<= 10;
c |= d & 0x03FF;
c += 0x10000;
}
else
return(-2);
}
/* assertion: c is a single UTF-4 value */
if (out >= outend)
return(-1);
if (c < 0x80) { *out++= c; bits= -6; }
else if (c < 0x800) { *out++= ((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000) { *out++= ((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else { *out++= ((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
if (out >= outend)
return(-1);
*out++= ((c >> bits) & 0x3F) | 0x80;
}
}
return(out-outstart);
}
/**
* UTF8ToUTF16BE:
* @outb: a pointer to an array of bytes to store the result
* @outlen: the length of @outb
* @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 an UTF-16BE
* block of chars out.
* TODO: UTF8ToUTF16BE need a fallback mechanism ...
*
* Returns the number of byte written, or -1 by lack of space, or -2
* if the transcoding failed.
*/
int
UTF8ToUTF16BE(unsigned char* outb, int outlen,
const unsigned char* in, int *inlen)
{
unsigned short* out = (unsigned short*) outb;
unsigned short* outstart= out;
unsigned short* outend;
const unsigned char* inend= in+*inlen;
unsigned int c, d, trailing;
#ifdef BIG_ENDIAN
#else
unsigned char *tmp;
unsigned short tmp1, tmp2;
#endif /* BIG_ENDIAN */
outlen /= 2; /* convert in short length */
outend = out + outlen;
while (in < inend) {
d= *in++;
if (d < 0x80) { c= d; trailing= 0; }
else if (d < 0xC0)
return(-2); /* trailing byte in leading position */
else if (d < 0xE0) { c= d & 0x1F; trailing= 1; }
else if (d < 0xF0) { c= d & 0x0F; trailing= 2; }
else if (d < 0xF8) { c= d & 0x07; trailing= 3; }
else
return(-2); /* no chance for this in UTF-16 */
if (inend - in < trailing) {
*inlen -= (inend - in);
break;
}
for ( ; trailing; trailing--) {
if ((in >= inend) || (((d= *in++) & 0xC0) != 0x80)) return(-1);
c <<= 6;
c |= d & 0x3F;
}
/* assertion: c is a single UTF-4 value */
if (c < 0x10000) {
if (out >= outend) return(-1);
#ifdef BIG_ENDIAN
*out++ = c;
#else
tmp = (unsigned char *) out;
*tmp = c >> 8;
*(tmp + 1) = c;
out++;
#endif /* BIG_ENDIAN */
}
else if (c < 0x110000) {
if (out+1 >= outend) return(-1);
c -= 0x10000;
#ifdef BIG_ENDIAN
*out++ = 0xD800 | (c >> 10);
*out++ = 0xDC00 | (c & 0x03FF);
#else
tmp1 = 0xD800 | (c >> 10);
tmp = (unsigned char *) out;
*tmp = tmp1 >> 8;
*(tmp + 1) = tmp1;
out++;
tmp2 = 0xDC00 | (c & 0x03FF);
tmp = (unsigned char *) out;
*tmp = tmp2 >> 8;
*(tmp + 1) = tmp2;
out++;
#endif
}
else return(-1);
}
return(out-outstart);
}
/**
* xmlDetectCharEncoding:
* @in: a pointer to the first bytes of the XML entity, must be at least
* 4 bytes long.
* @len: pointer to the length of the buffer
*
* Guess the encoding of the entity using the first bytes of the entity content
* accordingly of the non-normative appendix F of the XML-1.0 recommendation.
*
* Returns one of the XML_CHAR_ENCODING_... values.
*/
xmlCharEncoding
xmlDetectCharEncoding(const unsigned char* in, int len)
{
if (len >= 4) {
if ((in[0] == 0x00) && (in[1] == 0x00) &&
(in[2] == 0x00) && (in[3] == 0x3C))
return(XML_CHAR_ENCODING_UCS4BE);
if ((in[0] == 0x3C) && (in[1] == 0x00) &&
(in[2] == 0x00) && (in[3] == 0x00))
return(XML_CHAR_ENCODING_UCS4LE);
if ((in[0] == 0x00) && (in[1] == 0x00) &&
(in[2] == 0x3C) && (in[3] == 0x00))
return(XML_CHAR_ENCODING_UCS4_2143);
if ((in[0] == 0x00) && (in[1] == 0x3C) &&
(in[2] == 0x00) && (in[3] == 0x00))
return(XML_CHAR_ENCODING_UCS4_3412);
if ((in[0] == 0x4C) && (in[1] == 0x6F) &&
(in[2] == 0xA7) && (in[3] == 0x94))
return(XML_CHAR_ENCODING_EBCDIC);
if ((in[0] == 0x3C) && (in[1] == 0x3F) &&
(in[2] == 0x78) && (in[3] == 0x6D))
return(XML_CHAR_ENCODING_UTF8);
}
if (len >= 2) {
if ((in[0] == 0xFE) && (in[1] == 0xFF))
return(XML_CHAR_ENCODING_UTF16BE);
if ((in[0] == 0xFF) && (in[1] == 0xFE))
return(XML_CHAR_ENCODING_UTF16LE);
}
return(XML_CHAR_ENCODING_NONE);
}
/**
* xmlParseCharEncoding:
* @name: the encoding name as parsed, in UTF-8 format (ASCII actually)
*
* Conpare the string to the known encoding schemes already known. Note
* that the comparison is case insensitive accordingly to the section
* [XML] 4.3.3 Character Encoding in Entities.
*
* Returns one of the XML_CHAR_ENCODING_... values or XML_CHAR_ENCODING_NONE
* if not recognized.
*/
xmlCharEncoding
xmlParseCharEncoding(const char* name)
{
char upper[500];
int i;
for (i = 0;i < 499;i++) {
upper[i] = toupper(name[i]);
if (upper[i] == 0) break;
}
upper[i] = 0;
if (!strcmp(upper, "")) return(XML_CHAR_ENCODING_NONE);
if (!strcmp(upper, "UTF-8")) return(XML_CHAR_ENCODING_UTF8);
if (!strcmp(upper, "UTF8")) return(XML_CHAR_ENCODING_UTF8);
/*
* NOTE: if we were able to parse this, the endianness of UTF16 is
* already found and in use
*/
if (!strcmp(upper, "UTF-16")) return(XML_CHAR_ENCODING_UTF16LE);
if (!strcmp(upper, "UTF16")) return(XML_CHAR_ENCODING_UTF16LE);
if (!strcmp(upper, "ISO-10646-UCS-2")) return(XML_CHAR_ENCODING_UCS2);
if (!strcmp(upper, "UCS-2")) return(XML_CHAR_ENCODING_UCS2);
if (!strcmp(upper, "UCS2")) return(XML_CHAR_ENCODING_UCS2);
/*
* NOTE: if we were able to parse this, the endianness of UCS4 is
* already found and in use
*/
if (!strcmp(upper, "ISO-10646-UCS-4")) return(XML_CHAR_ENCODING_UCS4LE);
if (!strcmp(upper, "UCS-4")) return(XML_CHAR_ENCODING_UCS4LE);
if (!strcmp(upper, "UCS4")) return(XML_CHAR_ENCODING_UCS4LE);
if (!strcmp(upper, "ISO-8859-1")) return(XML_CHAR_ENCODING_8859_1);
if (!strcmp(upper, "ISO-LATIN-1")) return(XML_CHAR_ENCODING_8859_1);
if (!strcmp(upper, "ISO LATIN 1")) return(XML_CHAR_ENCODING_8859_1);
if (!strcmp(upper, "ISO-8859-2")) return(XML_CHAR_ENCODING_8859_2);
if (!strcmp(upper, "ISO-LATIN-2")) return(XML_CHAR_ENCODING_8859_2);
if (!strcmp(upper, "ISO LATIN 2")) return(XML_CHAR_ENCODING_8859_2);
if (!strcmp(upper, "ISO-8859-3")) return(XML_CHAR_ENCODING_8859_3);
if (!strcmp(upper, "ISO-8859-4")) return(XML_CHAR_ENCODING_8859_4);
if (!strcmp(upper, "ISO-8859-5")) return(XML_CHAR_ENCODING_8859_5);
if (!strcmp(upper, "ISO-8859-6")) return(XML_CHAR_ENCODING_8859_6);
if (!strcmp(upper, "ISO-8859-7")) return(XML_CHAR_ENCODING_8859_7);
if (!strcmp(upper, "ISO-8859-8")) return(XML_CHAR_ENCODING_8859_8);
if (!strcmp(upper, "ISO-8859-9")) return(XML_CHAR_ENCODING_8859_9);
if (!strcmp(upper, "ISO-2022-JP")) return(XML_CHAR_ENCODING_2022_JP);
if (!strcmp(upper, "Shift_JIS")) return(XML_CHAR_ENCODING_SHIFT_JIS);
if (!strcmp(upper, "EUC-JP")) return(XML_CHAR_ENCODING_EUC_JP);
return(XML_CHAR_ENCODING_ERROR);
}
/****************************************************************
* *
* Char encoding handlers *
* *
****************************************************************/
/* the size should be growable, but it's not a big deal ... */
#define MAX_ENCODING_HANDLERS 50
static xmlCharEncodingHandlerPtr *handlers = NULL;
static int nbCharEncodingHandler = 0;
/*
* The default is UTF-8 for XML, that's also the default used for the
* parser internals, so the default encoding handler is NULL
*/
static xmlCharEncodingHandlerPtr xmlDefaultCharEncodingHandler = NULL;
/**
* xmlNewCharEncodingHandler:
* @name: the encoding name, in UTF-8 format (ASCII actually)
* @input: the xmlCharEncodingInputFunc to read that encoding
* @output: the xmlCharEncodingOutputFunc to write that encoding
*
* Create and registers an xmlCharEncodingHandler.
* Returns the xmlCharEncodingHandlerPtr created (or NULL in case of error).
*/
xmlCharEncodingHandlerPtr
xmlNewCharEncodingHandler(const char *name,
xmlCharEncodingInputFunc input,
xmlCharEncodingOutputFunc output) {
xmlCharEncodingHandlerPtr handler;
char upper[500];
int i;
char *up = 0;
/*
* Keep only the uppercase version of the encoding.
*/
if (name == NULL) {
fprintf(stderr, "xmlNewCharEncodingHandler : no name !\n");
return(NULL);
}
for (i = 0;i < 499;i++) {
upper[i] = toupper(name[i]);
if (upper[i] == 0) break;
}
upper[i] = 0;
up = xmlMemStrdup(upper);
if (up == NULL) {
fprintf(stderr, "xmlNewCharEncodingHandler : out of memory !\n");
return(NULL);
}
/*
* allocate and fill-up an handler block.
*/
handler = (xmlCharEncodingHandlerPtr)
xmlMalloc(sizeof(xmlCharEncodingHandler));
if (handler == NULL) {
fprintf(stderr, "xmlNewCharEncodingHandler : out of memory !\n");
return(NULL);
}
handler->input = input;
handler->output = output;
handler->name = up;
/*
* registers and returns the handler.
*/
xmlRegisterCharEncodingHandler(handler);
return(handler);
}
/**
* xmlInitCharEncodingHandlers:
*
* Initialize the char encoding support, it registers the default
* encoding supported.
* NOTE: while public, this function usually doesn't need to be called
* in normal processing.
*/
void
xmlInitCharEncodingHandlers(void) {
if (handlers != NULL) return;
handlers = (xmlCharEncodingHandlerPtr *)
xmlMalloc(MAX_ENCODING_HANDLERS * sizeof(xmlCharEncodingHandlerPtr));
if (handlers == NULL) {
fprintf(stderr, "xmlInitCharEncodingHandlers : out of memory !\n");
return;
}
xmlNewCharEncodingHandler("UTF-8", NULL, NULL);
xmlUTF16LEHandler =
xmlNewCharEncodingHandler("UTF-16LE", UTF16LEToUTF8, UTF8ToUTF16LE);
xmlUTF16BEHandler =
xmlNewCharEncodingHandler("UTF-16BE", UTF16BEToUTF8, UTF8ToUTF16BE);
xmlNewCharEncodingHandler("ISO-8859-1", isolat1ToUTF8, UTF8Toisolat1);
}
/**
* xmlCleanupCharEncodingHandlers:
*
* Cleanup the memory allocated for the char encoding support, it
* unregisters all the encoding handlers.
*/
void
xmlCleanupCharEncodingHandlers(void) {
if (handlers == NULL) return;
for (;nbCharEncodingHandler > 0;) {
nbCharEncodingHandler--;
if (handlers[nbCharEncodingHandler] != NULL) {
xmlFree(handlers[nbCharEncodingHandler]->name);
xmlFree(handlers[nbCharEncodingHandler]);
}
}
xmlFree(handlers);
handlers = NULL;
nbCharEncodingHandler = 0;
xmlDefaultCharEncodingHandler = NULL;
}
/**
* xmlRegisterCharEncodingHandler:
* @handler: the xmlCharEncodingHandlerPtr handler block
*
* Register the char encoding handler, surprizing, isn't it ?
*/
void
xmlRegisterCharEncodingHandler(xmlCharEncodingHandlerPtr handler) {
if (handlers == NULL) xmlInitCharEncodingHandlers();
if (handler == NULL) {
fprintf(stderr, "xmlRegisterCharEncodingHandler: NULL handler !\n");
return;
}
if (nbCharEncodingHandler >= MAX_ENCODING_HANDLERS) {
fprintf(stderr,
"xmlRegisterCharEncodingHandler: Too many handler registered\n");
fprintf(stderr, "\tincrease MAX_ENCODING_HANDLERS : %s\n", __FILE__);
return;
}
handlers[nbCharEncodingHandler++] = handler;
}
/**
* xmlGetCharEncodingHandler:
* @enc: an xmlCharEncoding value.
*
* Search in the registrered set the handler able to read/write that encoding.
*
* Returns the handler or NULL if not found
*/
xmlCharEncodingHandlerPtr
xmlGetCharEncodingHandler(xmlCharEncoding enc) {
if (handlers == NULL) xmlInitCharEncodingHandlers();
switch (enc) {
case XML_CHAR_ENCODING_ERROR:
return(NULL);
case XML_CHAR_ENCODING_NONE:
return(NULL);
case XML_CHAR_ENCODING_UTF8:
return(NULL);
case XML_CHAR_ENCODING_UTF16LE:
return(xmlUTF16LEHandler);
case XML_CHAR_ENCODING_UTF16BE:
return(xmlUTF16BEHandler);
case XML_CHAR_ENCODING_EBCDIC:
return(NULL);
case XML_CHAR_ENCODING_UCS4LE:
return(NULL);
case XML_CHAR_ENCODING_UCS4BE:
return(NULL);
case XML_CHAR_ENCODING_UCS4_2143:
return(NULL);
case XML_CHAR_ENCODING_UCS4_3412:
return(NULL);
case XML_CHAR_ENCODING_UCS2:
return(NULL);
case XML_CHAR_ENCODING_8859_1:
return(NULL);
case XML_CHAR_ENCODING_8859_2:
return(NULL);
case XML_CHAR_ENCODING_8859_3:
return(NULL);
case XML_CHAR_ENCODING_8859_4:
return(NULL);
case XML_CHAR_ENCODING_8859_5:
return(NULL);
case XML_CHAR_ENCODING_8859_6:
return(NULL);
case XML_CHAR_ENCODING_8859_7:
return(NULL);
case XML_CHAR_ENCODING_8859_8:
return(NULL);
case XML_CHAR_ENCODING_8859_9:
return(NULL);
case XML_CHAR_ENCODING_2022_JP:
case XML_CHAR_ENCODING_SHIFT_JIS:
case XML_CHAR_ENCODING_EUC_JP:
return(NULL);
}
return(NULL);
}
/**
* xmlGetCharEncodingHandler:
* @enc: a string describing the char encoding.
*
* Search in the registrered set the handler able to read/write that encoding.
*
* Returns the handler or NULL if not found
*/
xmlCharEncodingHandlerPtr
xmlFindCharEncodingHandler(const char *name) {
char upper[500];
int i;
if (handlers == NULL) xmlInitCharEncodingHandlers();
if (name == NULL) return(xmlDefaultCharEncodingHandler);
if (name[0] == 0) return(xmlDefaultCharEncodingHandler);
for (i = 0;i < 499;i++) {
upper[i] = toupper(name[i]);
if (upper[i] == 0) break;
}
upper[i] = 0;
for (i = 0;i < nbCharEncodingHandler; i++)
if (!strcmp(name, handlers[i]->name))
return(handlers[i]);
return(NULL);
}
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