1 /*- 2 * Copyright (c) 1999,2000 3 * Konstantin Chuguev. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * iconv (Charset Conversion Library) v2.0 27 */ 28 #include <sys/types.h> 29 #include <assert.h> 30 #include <errno.h> 31 #include <stdlib.h> 32 #include <reent.h> 33 #include "local.h" 34 35 static int 36 _DEFUN(table_init, (rptr, data, name, desc_data), 37 struct _reent *rptr _AND 38 _VOID_PTR *data _AND 39 _CONST char *name _AND 40 _CONST _VOID_PTR desc_data) 41 { 42 int res; 43 struct iconv_ccs *ccs = _malloc_r(rptr, sizeof(struct iconv_ccs)); 44 if (ccs == NULL) 45 return __errno_r(rptr); 46 res = _iconv_ccs_init(rptr, ccs, name); 47 if (res) 48 _free_r(rptr, ccs); 49 else 50 (struct iconv_ccs *)(*data) = ccs; 51 return res; 52 } 53 54 static int 55 _DEFUN(table_close, (rptr, data), 56 struct _reent *rptr _AND 57 _VOID_PTR data) 58 { 59 int res = 0; 60 61 if (data != NULL) 62 res = ((struct iconv_ccs *)data)->close(rptr, (struct iconv_ccs *)data); 63 _free_r(rptr, data); 64 return res; 65 } 66 67 static ssize_t 68 _DEFUN(convert_from_ucs, (ces, in, outbuf, outbytesleft), 69 struct iconv_ces *ces _AND 70 ucs_t in _AND 71 unsigned char **outbuf _AND 72 size_t *outbytesleft) 73 { 74 ucs_t res; 75 size_t bytes; 76 77 if (in == UCS_CHAR_NONE) 78 return 1; /* No state reinitialization for table charsets */ 79 if (iconv_char32bit(in)) 80 return -1; 81 res = ICONV_CCS_CONVERT_FROM_UCS((struct iconv_ccs *)(ces->data), in); 82 if (res == UCS_CHAR_INVALID) 83 return -1; /* No character in output charset */ 84 bytes = res & 0xFF00 ? 2 : 1; 85 if (*outbytesleft < bytes) 86 return 0; /* No space in output buffer */ 87 if (bytes == 2) 88 *(*outbuf)++ = (res >> 8) & 0xFF; 89 *(*outbuf)++ = res & 0xFF; 90 *outbytesleft -= bytes; 91 return 1; 92 } 93 94 static ucs_t 95 _DEFUN(convert_to_ucs, (ces, inbuf, inbytesleft), 96 struct iconv_ces *ces _AND 97 _CONST unsigned char **inbuf _AND 98 size_t *inbytesleft) 99 { 100 struct iconv_ccs *ccsd = (struct iconv_ccs *)(ces->data); 101 unsigned char byte = *(*inbuf); 102 ucs_t res = ICONV_CCS_CONVERT_TO_UCS(ccsd, byte); 103 size_t bytes = (res == UCS_CHAR_INVALID && ccsd->nbits > 8) ? 2 : 1; 104 105 if (*inbytesleft < bytes) 106 return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */ 107 if (bytes == 2) 108 res = ICONV_CCS_CONVERT_TO_UCS(ccsd, (byte << 8) | (* ++(*inbuf))); 109 (*inbuf) ++; 110 *inbytesleft -= bytes; 111 return res; 112 } 113 114 _CONST struct iconv_ces_desc _iconv_ces_table_driven = { 115 table_init, 116 table_close, 117 _iconv_ces_reset_null, 118 convert_from_ucs, 119 convert_to_ucs, 120 NULL 121 }; 122 123