2 * Copyright (c) 2004, 2006, 2007, 2008 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 utf8toutf32(const unsigned char **pp, uint32_t *out)
40 const unsigned char *p = *pp;
44 if ((c & 0xE0) == 0xC0) {
45 const unsigned c2 = *++p;
46 if ((c2 & 0xC0) == 0x80) {
47 *out = ((c & 0x1F) << 6)
50 return WIND_ERR_INVALID_UTF8;
52 } else if ((c & 0xF0) == 0xE0) {
53 const unsigned c2 = *++p;
54 if ((c2 & 0xC0) == 0x80) {
55 const unsigned c3 = *++p;
56 if ((c3 & 0xC0) == 0x80) {
57 *out = ((c & 0x0F) << 12)
61 return WIND_ERR_INVALID_UTF8;
64 return WIND_ERR_INVALID_UTF8;
66 } else if ((c & 0xF8) == 0xF0) {
67 const unsigned c2 = *++p;
68 if ((c2 & 0xC0) == 0x80) {
69 const unsigned c3 = *++p;
70 if ((c3 & 0xC0) == 0x80) {
71 const unsigned c4 = *++p;
72 if ((c4 & 0xC0) == 0x80) {
73 *out = ((c & 0x07) << 18)
78 return WIND_ERR_INVALID_UTF8;
81 return WIND_ERR_INVALID_UTF8;
84 return WIND_ERR_INVALID_UTF8;
87 return WIND_ERR_INVALID_UTF8;
99 * Convert an UTF-8 string to an UCS4 string.
101 * @param in an UTF-8 string to convert.
102 * @param out the resulting UCS4 strint, must be at least
103 * wind_utf8ucs4_length() long. If out is NULL, the function will
104 * calculate the needed space for the out variable (just like
105 * wind_utf8ucs4_length()).
106 * @param out_len before processing out_len should be the length of
107 * the out variable, after processing it will be the length of the out
110 * @return returns 0 on success, an wind error code otherwise
115 wind_utf8ucs4(const char *in, uint32_t *out, size_t *out_len)
117 const unsigned char *p;
121 for (p = (const unsigned char *)in; *p != '\0'; ++p) {
124 ret = utf8toutf32(&p, &u);
130 return WIND_ERR_OVERRUN;
140 * Calculate the length of from converting a UTF-8 string to a UCS4
143 * @param in an UTF-8 string to convert.
144 * @param out_len the length of the resulting UCS4 string.
146 * @return returns 0 on success, an wind error code otherwise
151 wind_utf8ucs4_length(const char *in, size_t *out_len)
153 return wind_utf8ucs4(in, NULL, out_len);
156 static const char first_char[4] =
157 { 0x00, 0xC0, 0xE0, 0xF0 };
160 * Convert an UCS4 string to a UTF-8 string.
162 * @param in an UCS4 string to convert.
163 * @param in_len the length input array.
165 * @param out the resulting UTF-8 strint, must be at least
166 * wind_ucs4utf8_length() + 1 long (the extra char for the NUL). If
167 * out is NULL, the function will calculate the needed space for the
168 * out variable (just like wind_ucs4utf8_length()).
170 * @param out_len before processing out_len should be the length of
171 * the out variable, after processing it will be the length of the out
174 * @return returns 0 on success, an wind error code otherwise
179 wind_ucs4utf8(const uint32_t *in, size_t in_len, char *out, size_t *out_len)
184 for (o = 0, i = 0; i < in_len; i++) {
189 } else if (ch < 0x800) {
191 } else if (ch < 0x10000) {
193 } else if (ch <= 0x10FFFF) {
196 return WIND_ERR_INVALID_UTF32;
202 return WIND_ERR_OVERRUN;
206 out[3] = (ch | 0x80) & 0xbf;
209 out[2] = (ch | 0x80) & 0xbf;
212 out[1] = (ch | 0x80) & 0xbf;
215 out[0] = ch | first_char[len - 1];
221 if (o + 1 >= *out_len)
222 return WIND_ERR_OVERRUN;
230 * Calculate the length of from converting a UCS4 string to an UTF-8 string.
232 * @param in an UCS4 string to convert.
233 * @param in_len the length of UCS4 string to convert.
234 * @param out_len the length of the resulting UTF-8 string.
236 * @return returns 0 on success, an wind error code otherwise
241 wind_ucs4utf8_length(const uint32_t *in, size_t in_len, size_t *out_len)
243 return wind_ucs4utf8(in, in_len, NULL, out_len);
247 * Read in an UCS2 from a buffer.
249 * @param ptr The input buffer to read from.
250 * @param len the length of the input buffer.
251 * @param flags Flags to control the behavior of the function.
252 * @param out the output UCS2, the array must be at least out/2 long.
253 * @param out_len the output length
255 * @return returns 0 on success, an wind error code otherwise.
260 wind_ucs2read(const void *ptr, size_t len, unsigned int *flags,
261 uint16_t *out, size_t *out_len)
263 const unsigned char *p = ptr;
264 int little = ((*flags) & WIND_RW_LE);
265 size_t olen = *out_len;
267 /** if len is zero, flags are unchanged */
273 /** if len is odd, WIND_ERR_LENGTH_NOT_MOD2 is returned */
275 return WIND_ERR_LENGTH_NOT_MOD2;
278 * If the flags WIND_RW_BOM is set, check for BOM. If not BOM is
279 * found, check is LE/BE flag is already and use that otherwise
280 * fail with WIND_ERR_NO_BOM. When done, clear WIND_RW_BOM and
281 * the LE/BE flag and set the resulting LE/BE flag.
283 if ((*flags) & WIND_RW_BOM) {
284 uint16_t bom = (p[0] << 8) + p[1];
285 if (bom == 0xfffe || bom == 0xfeff) {
286 little = (bom == 0xfffe);
289 } else if (((*flags) & (WIND_RW_LE|WIND_RW_BE)) != 0) {
290 /* little already set */
292 return WIND_ERR_NO_BOM;
293 *flags = ((*flags) & ~(WIND_RW_BOM|WIND_RW_LE|WIND_RW_BE));
294 *flags |= little ? WIND_RW_LE : WIND_RW_BE;
299 return WIND_ERR_OVERRUN;
301 *out = (p[1] << 8) + p[0];
303 *out = (p[0] << 8) + p[1];
304 out++; p += 2; len -= 2; olen--;
311 * Write an UCS2 string to a buffer.
313 * @param in The input UCS2 string.
314 * @param in_len the length of the input buffer.
315 * @param flags Flags to control the behavior of the function.
316 * @param ptr The input buffer to write to, the array must be at least
317 * (in + 1) * 2 bytes long.
318 * @param out_len the output length
320 * @return returns 0 on success, an wind error code otherwise.
325 wind_ucs2write(const uint16_t *in, size_t in_len, unsigned int *flags,
326 void *ptr, size_t *out_len)
328 unsigned char *p = ptr;
329 size_t len = *out_len;
331 /** If in buffer is not of length be mod 2, WIND_ERR_LENGTH_NOT_MOD2 is returned*/
333 return WIND_ERR_LENGTH_NOT_MOD2;
335 /** On zero input length, flags are preserved */
340 /** If flags have WIND_RW_BOM set, the byte order mark is written
341 * first to the output data */
342 if ((*flags) & WIND_RW_BOM) {
343 uint16_t bom = 0xfffe;
346 return WIND_ERR_OVERRUN;
348 if ((*flags) & WIND_RW_LE) {
349 p[0] = (bom ) & 0xff;
350 p[1] = (bom >> 8) & 0xff;
352 p[1] = (bom ) & 0xff;
353 p[0] = (bom >> 8) & 0xff;
359 /** If the output wont fit into out_len, WIND_ERR_OVERRUN is returned */
361 return WIND_ERR_OVERRUN;
362 if ((*flags) & WIND_RW_LE) {
363 p[0] = (in[0] ) & 0xff;
364 p[1] = (in[0] >> 8) & 0xff;
366 p[1] = (in[0] ) & 0xff;
367 p[0] = (in[0] >> 8) & 0xff;
380 * Convert an UTF-8 string to an UCS2 string.
382 * @param in an UTF-8 string to convert.
383 * @param out the resulting UCS2 strint, must be at least
384 * wind_utf8ucs2_length() long. If out is NULL, the function will
385 * calculate the needed space for the out variable (just like
386 * wind_utf8ucs2_length()).
387 * @param out_len before processing out_len should be the length of
388 * the out variable, after processing it will be the length of the out
391 * @return returns 0 on success, an wind error code otherwise
396 wind_utf8ucs2(const char *in, uint16_t *out, size_t *out_len)
398 const unsigned char *p;
402 for (p = (const unsigned char *)in; *p != '\0'; ++p) {
405 ret = utf8toutf32(&p, &u);
410 return WIND_ERR_NOT_UTF16;
414 return WIND_ERR_OVERRUN;
424 * Calculate the length of from converting a UTF-8 string to a UCS2
427 * @param in an UTF-8 string to convert.
428 * @param out_len the length of the resulting UCS4 string.
430 * @return returns 0 on success, an wind error code otherwise
435 wind_utf8ucs2_length(const char *in, size_t *out_len)
437 return wind_utf8ucs2(in, NULL, out_len);
441 * Convert an UCS2 string to a UTF-8 string.
443 * @param in an UCS2 string to convert.
444 * @param in_len the length of the in UCS2 string.
445 * @param out the resulting UTF-8 strint, must be at least
446 * wind_ucs2utf8_length() long. If out is NULL, the function will
447 * calculate the needed space for the out variable (just like
448 * wind_ucs2utf8_length()).
449 * @param out_len before processing out_len should be the length of
450 * the out variable, after processing it will be the length of the out
453 * @return returns 0 on success, an wind error code otherwise
458 wind_ucs2utf8(const uint16_t *in, size_t in_len, char *out, size_t *out_len)
463 for (o = 0, i = 0; i < in_len; i++) {
468 } else if (ch < 0x800) {
477 return WIND_ERR_OVERRUN;
481 out[2] = (ch | 0x80) & 0xbf;
484 out[1] = (ch | 0x80) & 0xbf;
487 out[0] = ch | first_char[len - 1];
494 return WIND_ERR_OVERRUN;
502 * Calculate the length of from converting a UCS2 string to an UTF-8 string.
504 * @param in an UCS2 string to convert.
505 * @param in_len an UCS2 string length to convert.
506 * @param out_len the length of the resulting UTF-8 string.
508 * @return returns 0 on success, an wind error code otherwise
513 wind_ucs2utf8_length(const uint16_t *in, size_t in_len, size_t *out_len)
515 return wind_ucs2utf8(in, in_len, NULL, out_len);