diff options
Diffstat (limited to 'src/charset/codec_iconv.c')
-rw-r--r-- | src/charset/codec_iconv.c | 837 |
1 files changed, 0 insertions, 837 deletions
diff --git a/src/charset/codec_iconv.c b/src/charset/codec_iconv.c deleted file mode 100644 index 097e82a..0000000 --- a/src/charset/codec_iconv.c +++ /dev/null @@ -1,837 +0,0 @@ -/* - * This file is part of Hubbub. - * Licensed under the MIT License, - * http://www.opensource.org/licenses/mit-license.php - * Copyright 2007 John-Mark Bell <jmb@netsurf-browser.org> - */ - -/* This codec is hideously slow. Only use it as a last resort */ - -#include <errno.h> -#include <stdlib.h> -#include <string.h> - -#include <iconv.h> - -/* These two are for htonl / ntohl */ -#include <arpa/inet.h> -#include <netinet/in.h> - -#include "charset/aliases.h" -#include "utils/utils.h" - -#include "codec_impl.h" - -/** - * A note on endianness: - * - * UCS4 is big-endian by default. Therefore, this codec reads and writes - * big-endian values. This is fine, and causes no problems. However, to - * make life easier for client-supplied filter code, character values passed - * to a filter and those read back from a filter are in host-endian. - * Therefore, we need to convert from big-endian to host-endian when passing - * characters to a filter and perform the reverse translation when reading - * characters back. - */ - -/** - * Iconv-based charset codec - */ -typedef struct hubbub_iconv_codec { - hubbub_charsetcodec base; /**< Base class */ - - iconv_t read_cd; /**< Iconv handle for reading */ -#define INVAL_BUFSIZE (32) - uint8_t inval_buf[INVAL_BUFSIZE]; /**< Buffer for fixing up - * incomplete input - * sequences */ - size_t inval_len; /**< Number of bytes in inval_buf */ - -#define READ_BUFSIZE (8) - uint32_t read_buf[READ_BUFSIZE]; /**< Buffer for partial - * output sequences (decode) - */ - size_t read_len; /**< Number of characters in - * read_buf */ - - iconv_t write_cd; /**< Iconv handle for writing */ -#define WRITE_BUFSIZE (8) - uint32_t write_buf[WRITE_BUFSIZE]; /**< Buffer for partial - * output sequences (encode) - */ - size_t write_len; /**< Number of characters in - * write_buf */ -} hubbub_iconv_codec; - - -static bool hubbub_iconv_codec_handles_charset(const char *charset); -static hubbub_charsetcodec *hubbub_iconv_codec_create(const char *charset, - hubbub_alloc alloc, void *pw); -static void hubbub_iconv_codec_destroy (hubbub_charsetcodec *codec); -static hubbub_error hubbub_iconv_codec_encode(hubbub_charsetcodec *codec, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen); -static hubbub_error hubbub_iconv_codec_decode(hubbub_charsetcodec *codec, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen); -static hubbub_error hubbub_iconv_codec_reset(hubbub_charsetcodec *codec); -static hubbub_error hubbub_iconv_codec_filter_decoded_char( - hubbub_iconv_codec *c, uint32_t ucs4, uint8_t **dest, - size_t *destlen); -static bool hubbub_iconv_codec_is_unicode(hubbub_iconv_codec *c); -static hubbub_error hubbub_iconv_codec_read_char(hubbub_iconv_codec *c, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen); -static hubbub_error hubbub_iconv_codec_write_char(hubbub_iconv_codec *c, - uint32_t ucs4, uint8_t **dest, size_t *destlen); - -/** - * Determine whether this codec handles a specific charset - * - * \param charset Charset to test - * \return true if handleable, false otherwise - */ -bool hubbub_iconv_codec_handles_charset(const char *charset) -{ - iconv_t cd; - bool ret; - - cd = iconv_open("UCS-4", charset); - - ret = (cd != (iconv_t) -1); - - if (ret) - iconv_close(cd); - - return ret; -} - -/** - * Create an iconv-based codec - * - * \param charset The charset to read from / write to - * \param alloc Memory (de)allocation function - * \param pw Pointer to client-specific private data (may be NULL) - * \return Pointer to codec, or NULL on failure - */ -hubbub_charsetcodec *hubbub_iconv_codec_create(const char *charset, - hubbub_alloc alloc, void *pw) -{ - hubbub_iconv_codec *codec; - - codec = alloc(NULL, sizeof(hubbub_iconv_codec), pw); - if (codec == NULL) - return NULL; - - codec->read_cd = iconv_open("UCS-4", charset); - if (codec->read_cd == (iconv_t) -1) { - alloc(codec, 0, pw); - return NULL; - } - - codec->write_cd = iconv_open(charset, "UCS-4"); - if (codec->write_cd == (iconv_t) -1) { - iconv_close(codec->read_cd); - alloc(codec, 0, pw); - return NULL; - } - - codec->inval_buf[0] = '\0'; - codec->inval_len = 0; - - codec->read_buf[0] = 0; - codec->read_len = 0; - - codec->write_buf[0] = 0; - codec->write_len = 0; - - /* Finally, populate vtable */ - codec->base.handler.destroy = hubbub_iconv_codec_destroy; - codec->base.handler.encode = hubbub_iconv_codec_encode; - codec->base.handler.decode = hubbub_iconv_codec_decode; - codec->base.handler.reset = hubbub_iconv_codec_reset; - - return (hubbub_charsetcodec *) codec; -} - -/** - * Destroy an iconv-based codec - * - * \param codec The codec to destroy - */ -void hubbub_iconv_codec_destroy (hubbub_charsetcodec *codec) -{ - hubbub_iconv_codec *c = (hubbub_iconv_codec *) codec; - - iconv_close(c->read_cd); - iconv_close(c->write_cd); - - return; -} - -/** - * Encode a chunk of UCS4 data into an iconv-based codec's charset - * - * \param codec The codec to use - * \param source Pointer to pointer to source data - * \param sourcelen Pointer to length (in bytes) of source data - * \param dest Pointer to pointer to output buffer - * \param destlen Pointer to length (in bytes) of output buffer - * \return HUBBUB_OK on success, - * HUBBUB_NOMEM if output buffer is too small, - * HUBBUB_INVALID if a character cannot be represented and the - * codec's error handling mode is set to STRICT, - * <any_other_error> as a result of the failure of the - * client-provided filter function. - * - * On exit, ::source will point immediately _after_ the last input character - * read. Any remaining output for the character will be buffered by the - * codec for writing on the next call. This buffered data is post-filtering, - * so will not be refiltered on the next call. - * - * In the case of the filter function failing, ::source will point _at_ the - * last input character read; nothing will be written or buffered for the - * failed character. It is up to the client to fix the cause of the failure - * and retry the encoding process. - * - * Note that, if failure occurs whilst attempting to write any output - * buffered by the last call, then ::source and ::sourcelen will remain - * unchanged (as nothing more has been read). - * - * There is no way to determine the output character which caused a - * failure (as it may be one in a filter-injected replacement sequence). - * It is, however, possible to determine which source character caused it - * (this being the character immediately before the location pointed to by - * ::source on exit). - * - * [I.e. the process of filtering results in a potential one-to-many mapping - * between source characters and output characters, and identification of - * individual output characters is impossible.] - * - * ::sourcelen will be reduced appropriately on exit. - * - * ::dest will point immediately _after_ the last character written. - * - * ::destlen will be reduced appropriately on exit. - */ -hubbub_error hubbub_iconv_codec_encode(hubbub_charsetcodec *codec, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen) -{ - hubbub_iconv_codec *c = (hubbub_iconv_codec *) codec; - uint32_t ucs4; - const uint32_t *towrite; - size_t towritelen; - hubbub_error error; - - /* Process any outstanding characters from the previous call */ - if (c->write_len > 0) { - uint32_t *pwrite = c->write_buf; - - while (c->write_len > 0) { - error = hubbub_iconv_codec_write_char(c, pwrite[0], - dest, destlen); - if (error != HUBBUB_OK) { - /* Copy outstanding chars down, skipping - * invalid one, if present, so as to avoid - * reprocessing the invalid character */ - if (error == HUBBUB_INVALID) { - for (ucs4 = 1; ucs4 < c->write_len; - ucs4++) { - c->write_buf[ucs4] = - pwrite[ucs4]; - } - } - - return error; - } - - pwrite++; - c->write_len--; - } - } - - /* Now process the characters for this call */ - while (*sourcelen > 0) { - towrite = (const uint32_t *) (const void *) *source; - towritelen = 1; - ucs4 = *towrite; - - /* Run character we're about to output through the - * registered filter, so it can replace it, if it sees - * fit to do so */ - if (c->base.filter != NULL) { - uint32_t *replacement; - - error = c->base.filter(ntohl(ucs4), - &replacement, &towritelen, - c->base.filter_pw); - if (error != HUBBUB_OK) { - /* Don't eat character -- filter failed, - * so nothing gets written or buffered. - * It's up to the client to ensure that - * the filter works in the case where it - * reprocesses this character after the - * fault is fixed up. */ - - return error; - } - - /* Convert filter output to big endian UCS4 */ - for (ucs4 = 0; ucs4 < towritelen; ucs4++) { - replacement[ucs4] = htonl(replacement[ucs4]); - } - - towrite = (const uint32_t *) replacement; - } - - /* Output current character(s) */ - while (towritelen > 0) { - error = hubbub_iconv_codec_write_char(c, towrite[0], - dest, destlen); - - if (error != HUBBUB_OK) { - ucs4 = (error == HUBBUB_INVALID) ? 1 : 0; - - if (towritelen - ucs4 >= WRITE_BUFSIZE) - abort(); - - c->write_len = towritelen - ucs4; - - /* Copy pending chars to save area, for - * processing next call; skipping invalid - * character, if present, so it's not - * reprocessed. */ - for (; ucs4 < towritelen; ucs4++) { - c->write_buf[ucs4] = towrite[ucs4]; - } - - /* Claim character we've just buffered, - * so it's not repreocessed */ - *source += 4; - *sourcelen -= 4; - - return error; - } - - towrite++; - towritelen--; - } - - *source += 4; - *sourcelen -= 4; - } - - return HUBBUB_OK; -} - -/** - * Decode a chunk of data in an iconv-based codec's charset into UCS4 - * - * \param codec The codec to use - * \param source Pointer to pointer to source data - * \param sourcelen Pointer to length (in bytes) of source data - * \param dest Pointer to pointer to output buffer - * \param destlen Pointer to length (in bytes) of output buffer - * \return HUBBUB_OK on success, - * HUBBUB_NOMEM if output buffer is too small, - * HUBBUB_INVALID if a character cannot be represented and the - * codec's error handling mode is set to STRICT, - * <any_other_error> as a result of the failure of the - * client-provided filter function. - * - * On exit, ::source will point immediately _after_ the last input character - * read, if the result is _OK or _NOMEM. Any remaining output for the - * character will be buffered by the codec for writing on the next call. - * This buffered data is post-filtering, so will not be refiltered on the - * next call. - * - * In the case of the result being _INVALID or the filter function failing, - * ::source will point _at_ the last input character read; nothing will be - * written or buffered for the failed character. It is up to the client to - * fix the cause of the failure and retry the decoding process. - * - * Note that, if failure occurs whilst attempting to write any output - * buffered by the last call, then ::source and ::sourcelen will remain - * unchanged (as nothing more has been read). - * - * There is no way to determine the output character which caused a - * failure (as it may be one in a filter-injected replacement sequence). - * It is, however, possible to determine which source character caused it - * (this being the character immediately at or before the location pointed - * to by ::source on exit). - * - * [I.e. the process of filtering results in a potential one-to-many mapping - * between source characters and output characters, and identification of - * individual output characters is impossible.] - * - * If STRICT error handling is configured and an illegal sequence is split - * over two calls, then _INVALID will be returned from the second call, - * but ::source will point mid-way through the invalid sequence (i.e. it - * will be unmodified over the second call). In addition, the internal - * incomplete-sequence buffer will be emptied, such that subsequent calls - * will progress, rather than re-evaluating the same invalid sequence. - * - * ::sourcelen will be reduced appropriately on exit. - * - * ::dest will point immediately _after_ the last character written. - * - * ::destlen will be reduced appropriately on exit. - * - * Call this with a source length of 0 to flush the output buffer. - */ -hubbub_error hubbub_iconv_codec_decode(hubbub_charsetcodec *codec, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen) -{ - hubbub_iconv_codec *c = (hubbub_iconv_codec *) codec; - hubbub_error error; - - if (c->read_len > 0) { - /* Output left over from last decode - * Attempt to finish this here */ - uint32_t *pread = c->read_buf; - - while (c->read_len > 0 && *destlen >= c->read_len * 4) { - *((uint32_t *) (void *) *dest) = pread[0]; - - *dest += 4; - *destlen -= 4; - - pread++; - c->read_len--; - } - - if (*destlen < c->read_len * 4) { - /* Run out of output buffer */ - size_t i; - - /* Shuffle remaining output down */ - for (i = 0; i < c->read_len; i++) { - c->read_buf[i] = pread[i]; - } - - return HUBBUB_NOMEM; - } - } - - if (c->inval_len > 0) { - /* The last decode ended in an incomplete sequence. - * Fill up inval_buf with data from the start of the - * new chunk and process it. */ - uint8_t *in = c->inval_buf; - size_t ol = c->inval_len; - size_t l = min(INVAL_BUFSIZE - ol - 1, *sourcelen); - size_t orig_l = l; - - memcpy(c->inval_buf + ol, *source, l); - - l += c->inval_len; - - error = hubbub_iconv_codec_read_char(c, - (const uint8_t **) &in, &l, dest, destlen); - if (error != HUBBUB_OK && error != HUBBUB_NOMEM) { - return error; - } - - - /* And now, fix everything up so the normal processing - * does the right thing. */ - *source += max((signed) (orig_l - l), 0); - *sourcelen -= max((signed) (orig_l - l), 0); - - /* Failed to resolve an incomplete character and - * ran out of buffer space. No recovery strategy - * possible, so explode everywhere. */ - if ((orig_l + ol) - l == 0) - abort(); - - /* Handle memry exhaustion case from above */ - if (error != HUBBUB_OK) - return error; - } - - while (*sourcelen > 0) { - error = hubbub_iconv_codec_read_char(c, - source, sourcelen, dest, destlen); - if (error != HUBBUB_OK) { - return error; - } - } - - return HUBBUB_OK; -} - -/** - * Clear an iconv-based codec's encoding state - * - * \param codec The codec to reset - * \return HUBBUB_OK on success, appropriate error otherwise - */ -hubbub_error hubbub_iconv_codec_reset(hubbub_charsetcodec *codec) -{ - hubbub_iconv_codec *c = (hubbub_iconv_codec *) codec; - - iconv(c->read_cd, NULL, NULL, NULL, NULL); - iconv(c->write_cd, NULL, NULL, NULL, NULL); - - c->inval_buf[0] = '\0'; - c->inval_len = 0; - - c->read_buf[0] = 0; - c->read_len = 0; - - c->write_buf[0] = 0; - c->write_len = 0; - - return HUBBUB_OK; -} - -/** - * Feed a UCS4 character through the registered filter and output the result - * - * \param c Codec to use - * \param ucs4 UCS4 character (big endian) - * \param dest Pointer to pointer to output buffer - * \param destlen Pointer to output buffer length - * \return HUBBUB_OK on success, - * HUBBUB_NOMEM if output buffer is too small, - * <any_other_error> as a result of the failure of the - * client-provided filter function. - */ -hubbub_error hubbub_iconv_codec_filter_decoded_char(hubbub_iconv_codec *c, - uint32_t ucs4, uint8_t **dest, size_t *destlen) -{ - if (c->base.filter != NULL) { - uint32_t *rep; - size_t replen; - hubbub_error error; - - error = c->base.filter(ntohl(ucs4), &rep, &replen, - c->base.filter_pw); - if (error != HUBBUB_OK) { - return error; - } - - while (replen > 0 && *destlen >= replen * 4) { - *((uint32_t *) (void *) *dest) = htonl(*rep); - - *dest += 4; - *destlen -= 4; - - rep++; - replen--; - } - - if (*destlen < replen * 4) { - /* Run out of output buffer */ - size_t i; - - /* Buffer remaining output */ - c->read_len = replen; - - for (i = 0; i < replen; i++) { - c->read_buf[i] = htonl(rep[i]); - } - - return HUBBUB_NOMEM; - } - - } else { - if (*destlen < 4) { - /* Run out of output buffer */ - - c->read_len = 1; - c->read_buf[0] = ucs4; - - return HUBBUB_NOMEM; - } - - *((uint32_t *) (void *) *dest) = ucs4; - *dest += 4; - *destlen -= 4; - } - - return HUBBUB_OK; -} - -/** - * Detect if a codec's charset is Unicode capable - * - * \param c Codec to consider - * \return true if a Unicode variant, false otherwise - */ -bool hubbub_iconv_codec_is_unicode(hubbub_iconv_codec *c) -{ - static uint16_t ucs4; - static uint16_t ucs2; - static uint16_t utf8; - static uint16_t utf16; - static uint16_t utf16be; - static uint16_t utf16le; - static uint16_t utf32; - static uint16_t utf32be; - static uint16_t utf32le; - - if (ucs4 == 0) { - ucs4 = hubbub_mibenum_from_name("UCS-4", SLEN("UCS-4")); - ucs2 = hubbub_mibenum_from_name("UCS-2", SLEN("UCS-2")); - utf8 = hubbub_mibenum_from_name("UTF-8", SLEN("UTF-8")); - utf16 = hubbub_mibenum_from_name("UTF-16", SLEN("UTF-16")); - utf16be = hubbub_mibenum_from_name("UTF-16BE", - SLEN("UTF-16BE")); - utf16le = hubbub_mibenum_from_name("UTF-16LE", - SLEN("UTF-16LE")); - utf32 = hubbub_mibenum_from_name("UTF-32", SLEN("UTF-32")); - utf32be = hubbub_mibenum_from_name("UTF-32BE", - SLEN("UTF-32BE")); - utf32le = hubbub_mibenum_from_name("UTF-32LE", - SLEN("UTF-32LE")); - } - - return (c->base.mibenum == ucs4 || - c->base.mibenum == ucs2 || - c->base.mibenum == utf8 || - c->base.mibenum == utf16 || - c->base.mibenum == utf16be || - c->base.mibenum == utf16le || - c->base.mibenum == utf32 || - c->base.mibenum == utf32be || - c->base.mibenum == utf32le); -} - -/** - * Read a character from the codec's native charset to UCS4 (big endian) - * - * \param c The codec - * \param source Pointer to pointer to source buffer (updated on exit) - * \param sourcelen Pointer to length of source buffer (updated on exit) - * \param dest Pointer to pointer to output buffer (updated on exit) - * \param destlen Pointer to length of output buffer (updated on exit) - * \return HUBBUB_OK on success, - * HUBBUB_NOMEM if output buffer is too small, - * HUBBUB_INVALID if a character cannot be represented and the - * codec's error handling mode is set to STRICT, - * <any_other_error> as a result of the failure of the - * client-provided filter function. - * - * On exit, ::source will point immediately _after_ the last input character - * read, if the result is _OK or _NOMEM. Any remaining output for the - * character will be buffered by the codec for writing on the next call. - * This buffered data is post-filtering, so will not be refiltered on the - * next call. - * - * In the case of the result being _INVALID or the filter function failing, - * ::source will point _at_ the last input character read; nothing will be - * written or buffered for the failed character. It is up to the client to - * fix the cause of the failure and retry the decoding process. - * - * ::sourcelen will be reduced appropriately on exit. - * - * ::dest will point immediately _after_ the last character written. - * - * ::destlen will be reduced appropriately on exit. - */ -hubbub_error hubbub_iconv_codec_read_char(hubbub_iconv_codec *c, - const uint8_t **source, size_t *sourcelen, - uint8_t **dest, size_t *destlen) -{ - size_t iconv_ret; - const uint8_t *origsrc = *source; - size_t origsrclen = *sourcelen; - uint32_t ucs4; - uint8_t *pucs4 = (uint8_t *) &ucs4; - size_t sucs4 = 4; - hubbub_error error; - - /* Use iconv to convert a single character - * Side effect: Updates *source to point at next input - * character and *sourcelen to reflect reduced input length - */ - iconv_ret = iconv(c->read_cd, (char **) source, sourcelen, - (char **) (void *) &pucs4, &sucs4); - - if (iconv_ret != (size_t) -1 || - (*source != origsrc && sucs4 == 0)) { - /* Read a character */ - error = hubbub_iconv_codec_filter_decoded_char(c, - ucs4, dest, destlen); - if (error != HUBBUB_OK && error != HUBBUB_NOMEM) { - /* filter function failed; restore source pointers */ - *source = origsrc; - *sourcelen = origsrclen; - } - - /* Clear inval buffer */ - c->inval_buf[0] = '\0'; - c->inval_len = 0; - - return error; - } else if (errno == E2BIG) { - /* Should never happen */ - abort(); - } else if (errno == EINVAL) { - /* Incomplete input sequence */ - if (*sourcelen > INVAL_BUFSIZE) - abort(); - - memmove(c->inval_buf, (const char *) *source, *sourcelen); - c->inval_buf[*sourcelen] = '\0'; - c->inval_len = *sourcelen; - - *source += *sourcelen; - *sourcelen = 0; - - return HUBBUB_OK; - } else if (errno == EILSEQ) { - /* Illegal input sequence */ - bool found = false; - const uint8_t *oldsrc; - size_t oldsrclen; - - /* Clear inval buffer */ - c->inval_buf[0] = '\0'; - c->inval_len = 0; - - /* Strict errormode; simply flag invalid character */ - if (c->base.errormode == HUBBUB_CHARSETCODEC_ERROR_STRICT) { - /* restore source pointers */ - *source = origsrc; - *sourcelen = origsrclen; - - return HUBBUB_INVALID; - } - - /* Ok, this becomes problematic. The iconv API here - * is particularly unhelpful; *source will point at - * the _start_ of the illegal sequence. This means - * that we must find the end of the sequence */ - - /* Search for the start of the next valid input - * sequence (or the end of the input stream) */ - while (*sourcelen > 1) { - pucs4 = (uint8_t *) &ucs4; - sucs4 = 4; - - (*source)++; - (*sourcelen)--; - - oldsrc = *source; - oldsrclen = *sourcelen; - - iconv_ret = iconv(c->read_cd, - (char **) source, sourcelen, - (char **) (void *) &pucs4, &sucs4); - if (iconv_ret != (size_t) -1 || errno != EILSEQ) { - found = true; - break; - } - } - - if (found) { - /* Found start of next valid sequence */ - *source = oldsrc; - *sourcelen = oldsrclen; - } else { - /* Not found - skip last byte in buffer */ - (*source)++; - (*sourcelen)--; - - if (*sourcelen != 0) - abort(); - } - - /* output U+FFFD and continue processing. */ - error = hubbub_iconv_codec_filter_decoded_char(c, - htonl(0xFFFD), dest, destlen); - if (error != HUBBUB_OK && error != HUBBUB_NOMEM) { - /* filter function failed; restore source pointers */ - *source = origsrc; - *sourcelen = origsrclen; - } - - return error; - } - - return HUBBUB_OK; -} - -/** - * Write a UCS4 character in a codec's native charset - * - * \param c The codec - * \param ucs4 The UCS4 character to write (big endian) - * \param dest Pointer to pointer to output buffer (updated on exit) - * \param destlen Pointer to length of output buffer (updated on exit) - * \return HUBBUB_OK on success, - * HUBBUB_NOMEM if output buffer is too small, - * HUBBUB_INVALID if character cannot be represented and the - * codec's error handling mode is set to STRICT. - */ -hubbub_error hubbub_iconv_codec_write_char(hubbub_iconv_codec *c, - uint32_t ucs4, uint8_t **dest, size_t *destlen) -{ - size_t iconv_ret; - uint8_t *pucs4 = (uint8_t *) &ucs4; - size_t sucs4 = 4; - uint8_t *origdest = *dest; - - iconv_ret = iconv(c->write_cd, (char **) (void *) &pucs4, - &sucs4, (char **) dest, destlen); - - if (iconv_ret == (size_t) -1 && errno == E2BIG) { - /* Output buffer is too small */ - return HUBBUB_NOMEM; - } else if (iconv_ret == (size_t) -1 && errno == EILSEQ) { - /* Illegal multibyte sequence */ - /* This should never happen */ - abort(); - } else if (iconv_ret == (size_t) -1 && errno == EINVAL) { - /* Incomplete input character */ - /* This should never happen */ - abort(); - } else if (*dest == origdest) { - /* Nothing was output */ - switch (c->base.errormode) { - case HUBBUB_CHARSETCODEC_ERROR_STRICT: - return HUBBUB_INVALID; - - case HUBBUB_CHARSETCODEC_ERROR_TRANSLIT: - /** \todo transliteration */ - case HUBBUB_CHARSETCODEC_ERROR_LOOSE: - { - pucs4 = (uint8_t *) &ucs4; - sucs4 = 4; - - ucs4 = hubbub_iconv_codec_is_unicode(c) - ? htonl(0xFFFD) : htonl(0x3F); - - iconv_ret = iconv(c->write_cd, - (char **) (void *) &pucs4, &sucs4, - (char **) dest, destlen); - - if (iconv_ret == (size_t) -1 && errno == E2BIG) { - return HUBBUB_NOMEM; - } else if (iconv_ret == (size_t) -1 && - errno == EILSEQ) { - /* Illegal multibyte sequence */ - /* This should never happen */ - abort(); - } else if (iconv_ret == (size_t) -1 && - errno == EINVAL) { - /* Incomplete input character */ - /* This should never happen */ - abort(); - } - } - break; - } - } - - return HUBBUB_OK; -} - -const hubbub_charsethandler hubbub_iconv_codec_handler = { - hubbub_iconv_codec_handles_charset, - hubbub_iconv_codec_create -}; |