/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * * This program covers conversion from UTF-8, UCS-2, and, UCS-4 to UTF-7. * UTF-7 is described in RFC 2152. * We only support conversions between UCS-2/UCS-4/UTF-8 and UTF-7. No * other UCS formats are going to be supported unless there is a significant * reason. */ #include #include #include #include #include "ucs_to_utf7.h" void * _icv_open() { utf7_state_t *cd = (utf7_state_t *)calloc(1, sizeof(utf7_state_t)); if (cd == (utf7_state_t *)NULL) { errno = ENOMEM; return((void *)-1); } #if defined(_LITTLE_ENDIAN) cd->little_endian = true; #endif return((void *)cd); } void _icv_close(utf7_state_t *cd) { if (! cd) errno = EBADF; else free((void *)cd); } size_t _icv_iconv(utf7_state_t *cd, char **inbuf, size_t *inbufleft, char **outbuf, size_t *outbufleft) { size_t ret_val = 0; uchar_t *ib; uchar_t *ob; uchar_t *ibtail; uchar_t *obtail; uchar_t *ib_org; uint_t u4; uint_t u7; signed char sz; signed char new_bits_count; signed char new_remnant_count; #if defined(UCS_2) || defined(UCS_4) register int i; #endif if (! cd) { errno = EBADF; return((size_t)-1); } if (!inbuf || !(*inbuf)) { if (cd->in_the_middle_of_utf7_sequence) { sz = (cd->remnant_count > 0) ? 2 : 1; if ((! outbufleft) || *outbufleft < sz) { errno = E2BIG; return((size_t)-1); } if (cd->remnant_count > 0) { /* Masking is needed. */ **outbuf = mb64[((cd->remnant << (6 - cd->remnant_count)) & 0x003f)]; (*outbuf)++; } **outbuf = '-'; (*outbuf)++; *outbufleft -= sz; } cd->remnant = 0; cd->remnant_count = 0; cd->in_the_middle_of_utf7_sequence = false; #if defined(UCS_2) || defined(UCS_4) cd->bom_written = false; #endif return((size_t)0); } ib = (uchar_t *)*inbuf; ob = (uchar_t *)*outbuf; ibtail = ib + *inbufleft; obtail = ob + *outbufleft; #if defined(UCS_2) || defined(UCS_4) if (! cd->bom_written) { if ((ibtail - ib) < ICV_FETCH_UCS_SIZE) { errno = EINVAL; return((size_t)-1); } for (u4 = 0, i = 0; i < ICV_FETCH_UCS_SIZE; i++) u4 = (u4 << 8) | ((uint_t)(*(ib + i))); if (u4 == ICV_BOM_IN_BIG_ENDIAN) { ib += ICV_FETCH_UCS_SIZE; cd->little_endian = false; } else if (u4 == ICV_BOM_IN_LITTLE_ENDIAN) { ib += ICV_FETCH_UCS_SIZE; cd->little_endian = true; } } cd->bom_written = true; #endif while (ib < ibtail) { #if defined(UTF_8) sz = number_of_bytes_in_utf8_char[*ib]; if (sz == ICV_TYPE_ILLEGAL_CHAR) { errno = EILSEQ; ret_val = (size_t)-1; break; } #elif defined(UCS_2) || defined(UCS_4) sz = ICV_FETCH_UCS_SIZE; #else #error "Fatal: One of UTF_8, UCS_2, or, UCS_4 is needed." #endif if ((ibtail - ib) < sz) { errno = EINVAL; ret_val = (size_t)-1; break; } ib_org = ib; #if defined(UTF_8) u4 = *ib++ & masks_tbl[sz]; for (; sz > 1; sz--) { if (((uint_t)*ib) < 0x80) { ib = ib_org; errno = EILSEQ; ret_val = (size_t)-1; goto illegal_char_err; } u4 = (u4 << ICV_UTF8_BIT_SHIFT) | (((uint_t)*ib) & ICV_UTF8_BIT_MASK); ib++; } #elif defined(UCS_2) || defined(UCS_4) u4 = 0; if (cd->little_endian) { for (i = ICV_FETCH_UCS_SIZE - 1; i >= 0; i--) u4 = (u4 << 8) | ((uint_t)(*(ib + i))); } else { for (i = 0; i < ICV_FETCH_UCS_SIZE; i++) u4 = (u4 << 8) | ((uint_t)(*(ib + i))); } ib += ICV_FETCH_UCS_SIZE; #endif /* Check against known non-characters. */ #if defined(UTF_8) if ((u4 & ICV_UTF32_NONCHAR_mask) == ICV_UTF32_NONCHAR_fffe || (u4 & ICV_UTF32_NONCHAR_mask) == ICV_UTF32_NONCHAR_ffff || u4 > ICV_UTF32_LAST_VALID_CHAR || (u4 >= ICV_UTF32_SURROGATE_START_d800 && u4 <= ICV_UTF32_SURROGATE_END_dfff) || (u4 >= ICV_UTF32_ARABIC_NONCHAR_START_fdd0 && u4 <= ICV_UTF32_ARABIC_NONCHAR_END_fdef)) { #elif defined(UCS_2) if (u4 >= ICV_UTF32_NONCHAR_fffe || (u4 >= ICV_UTF32_SURROGATE_START_d800 && u4 <= ICV_UTF32_SURROGATE_END_dfff) || (u4 >= ICV_UTF32_ARABIC_NONCHAR_START_fdd0 && u4 <= ICV_UTF32_ARABIC_NONCHAR_END_fdef)) { #else if ((u4 & ICV_UTF32_NONCHAR_mask) == ICV_UTF32_NONCHAR_fffe || (u4 & ICV_UTF32_NONCHAR_mask) == ICV_UTF32_NONCHAR_ffff || u4 > ICV_UCS4_LAST_VALID_CHAR || (u4 >= ICV_UTF32_SURROGATE_START_d800 && u4 <= ICV_UTF32_SURROGATE_END_dfff) || (u4 >= ICV_UTF32_ARABIC_NONCHAR_START_fdd0 && u4 <= ICV_UTF32_ARABIC_NONCHAR_END_fdef)) { #endif ib = ib_org; errno = EILSEQ; ret_val = (size_t)-1; goto illegal_char_err; } #if defined(UCS_4) || defined(UTF_8) if (u4 > 0x00ffff) { u4 = ICV_CHAR_UCS2_REPLACEMENT; ret_val++; } #endif /* Set D or Rule 3? */ if ((u4 >= (uint_t)'A' && u4 <= (uint_t)'Z') || (u4 >= (uint_t)'a' && u4 <= (uint_t)'z') || (u4 >= (uint_t)'0' && u4 <= (uint_t)'9') || u4 == (uint_t)'\'' || u4 == (uint_t)'(' || u4 == (uint_t)')' || (u4 >= (uint_t)',' && u4 <= (uint_t)'/') || /* , - . / */ u4 == (uint_t)':' || u4 == (uint_t)'?' || u4 == (uint_t)' ' || u4 == (uint_t)'\t' || u4 == (uint_t)'\r' || u4 == (uint_t)'\n') { u7 = 0; sz = 1; if (cd->in_the_middle_of_utf7_sequence) { if (cd->remnant_count > 0) { sz++; u7 = cd->remnant << (6 - cd->remnant_count); } if (u4 == (uint_t)'-' || ICV_INRANGE_OF_MBASE64_ALPHABET(u4)) sz++; } if ((obtail - ob) < sz) { ib = ib_org; errno = E2BIG; ret_val = (size_t)-1; break; } if (cd->in_the_middle_of_utf7_sequence) { /* Masking is needed. */ if (cd->remnant_count > 0) *ob++ = mb64[u7 & 0x003f]; if (u4 == (uint_t)'-' || ICV_INRANGE_OF_MBASE64_ALPHABET(u4)) *ob++ = '-'; cd->in_the_middle_of_utf7_sequence = false; cd->remnant_count = 0; } *ob++ = (uchar_t)(u4 & 0x007f); } else { /* * Any UCS-2 character sequences will yield: * * +-16 bits (UCS-2)-+ +-16 bits (UCS-2)-+ +-16 bits (UCS-2)-+ * | | | | | | * xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx * | || | | || | | || | | || | * +-----++-----+ +------++-----+ +-----++------+ +-----++-----+ MBase64 chars * ^ ^ * initially, | | * four remnant bits, | * two remnant bits, * * and, then no remnant bit for three sequential UCS-2 characters, * respectively, and repeat these three UCS-2 character sequences. For the * first UCS-2 character in this sequence, there will be two MBase64 * characters, and for the second and the third UCS-2 characters, there will be * three MBase64 characters. */ sz = (cd->remnant_count) ? 3 : 2; if (! cd->in_the_middle_of_utf7_sequence) sz++; if ((obtail - ob) < sz) { ib = ib_org; errno = E2BIG; ret_val = (size_t)-1; break; } if (! cd->in_the_middle_of_utf7_sequence) { *ob++ = '+'; cd->in_the_middle_of_utf7_sequence = true; } if (cd->remnant_count) { new_bits_count = 18 - cd->remnant_count; new_remnant_count = 16 - new_bits_count; u7 = (cd->remnant << new_bits_count) | (u4 >> new_remnant_count); cd->remnant = u4 & 0x0003; cd->remnant_count = new_remnant_count; /* Masking is needed. */ *ob++ = mb64[(u7 >> 12) & 0x003f]; *ob++ = mb64[(u7 >> 6) & 0x003f]; *ob++ = mb64[u7 & 0x003f]; } else { cd->remnant = u4 & 0x000f; cd->remnant_count = 4; /* Masking is needed. */ *ob++ = mb64[(u4 >> 10) & 0x003f]; *ob++ = mb64[(u4 >> 4) & 0x003f]; } } } illegal_char_err: *inbuf = (char *)ib; *inbufleft = ibtail - ib; *outbuf = (char *)ob; *outbufleft = obtail - ob; return(ret_val); }