diff options
Diffstat (limited to 'src/couch/priv/couch_js/60/utf8.cpp')
| -rw-r--r-- | src/couch/priv/couch_js/60/utf8.cpp | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/src/couch/priv/couch_js/60/utf8.cpp b/src/couch/priv/couch_js/60/utf8.cpp deleted file mode 100644 index 38dfa6224..000000000 --- a/src/couch/priv/couch_js/60/utf8.cpp +++ /dev/null @@ -1,301 +0,0 @@ -// Licensed under the Apache License, Version 2.0 (the "License"); you may not -// use this file except in compliance with the License. You may obtain a copy of -// the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT -// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the -// License for the specific language governing permissions and limitations under -// the License. - -#include <jsapi.h> -#include <js/Initialization.h> -#include <js/Conversions.h> -#include <js/Wrapper.h> -#include "config.h" -#include "util.h" - -static int -enc_char(uint8_t *utf8Buffer, uint32_t ucs4Char) -{ - int utf8Length = 1; - - if (ucs4Char < 0x80) - { - *utf8Buffer = (uint8_t)ucs4Char; - } - else - { - int i; - uint32_t a = ucs4Char >> 11; - utf8Length = 2; - while(a) - { - a >>= 5; - utf8Length++; - } - i = utf8Length; - while(--i) - { - utf8Buffer[i] = (uint8_t)((ucs4Char & 0x3F) | 0x80); - ucs4Char >>= 6; - } - *utf8Buffer = (uint8_t)(0x100 - (1 << (8-utf8Length)) + ucs4Char); - } - - return utf8Length; -} - -static bool -enc_charbuf(const char16_t* src, size_t srclen, char* dst, size_t* dstlenp) -{ - size_t i; - size_t utf8Len; - size_t dstlen = *dstlenp; - size_t origDstlen = dstlen; - char16_t c; - char16_t c2; - uint32_t v; - uint8_t utf8buf[6]; - - if(!dst) - { - dstlen = origDstlen = (size_t) -1; - } - - while(srclen) - { - c = *src++; - srclen--; - - if(c <= 0xD7FF || c >= 0xE000) - { - v = (uint32_t) c; - } - else if(c >= 0xD800 && c <= 0xDBFF) - { - if(srclen < 1) goto buffer_too_small; - c2 = *src++; - srclen--; - if(c2 >= 0xDC00 && c2 <= 0xDFFF) - { - v = (uint32_t) (((c - 0xD800) << 10) + (c2 - 0xDC00) + 0x10000); - } - else - { - // Invalid second half of surrogate pair - v = (uint32_t) 0xFFFD; - // Undo our character advancement - src--; - srclen++; - } - } - else - { - // Invalid first half surrogate pair - v = (uint32_t) 0xFFFD; - } - - if(v < 0x0080) - { - /* no encoding necessary - performance hack */ - if(!dstlen) goto buffer_too_small; - if(dst) *dst++ = (char) v; - utf8Len = 1; - } - else - { - utf8Len = enc_char(utf8buf, v); - if(utf8Len > dstlen) goto buffer_too_small; - if(dst) - { - for (i = 0; i < utf8Len; i++) - { - *dst++ = (char) utf8buf[i]; - } - } - } - dstlen -= utf8Len; - } - - *dstlenp = (origDstlen - dstlen); - return true; - -buffer_too_small: - *dstlenp = (origDstlen - dstlen); - return false; -} - -char* -enc_string(JSContext* cx, JS::Value arg, size_t* buflen) -{ - JSString* str = NULL; - const char16_t* src = NULL; - char* bytes = NULL; - size_t srclen = 0; - size_t byteslen = 0; - js::AutoStableStringChars rawChars(cx); - - str = arg.toString(); - if(!str) goto error; - - if (!rawChars.initTwoByte(cx, str)) - return NULL; - - src = rawChars.twoByteRange().begin().get(); - srclen = JS_GetStringLength(str); - - if(!enc_charbuf(src, srclen, NULL, &byteslen)) goto error; - - bytes = (char *)JS_malloc(cx, (byteslen) + 1); - bytes[byteslen] = 0; - - if(!enc_charbuf(src, srclen, bytes, &byteslen)) goto error; - - if(buflen) *buflen = byteslen; - goto success; - -error: - if(bytes != NULL) JS_free(cx, bytes); - bytes = NULL; - -success: - return bytes; -} - -static uint32_t -dec_char(const uint8_t *utf8Buffer, int utf8Length) -{ - uint32_t ucs4Char; - uint32_t minucs4Char; - - /* from Unicode 3.1, non-shortest form is illegal */ - static const uint32_t minucs4Table[] = { - 0x00000080, 0x00000800, 0x0001000, 0x0020000, 0x0400000 - }; - - if (utf8Length == 1) - { - ucs4Char = *utf8Buffer; - } - else - { - ucs4Char = *utf8Buffer++ & ((1<<(7-utf8Length))-1); - minucs4Char = minucs4Table[utf8Length-2]; - while(--utf8Length) - { - ucs4Char = ucs4Char<<6 | (*utf8Buffer++ & 0x3F); - } - if(ucs4Char < minucs4Char || ucs4Char == 0xFFFE || ucs4Char == 0xFFFF) - { - ucs4Char = 0xFFFD; - } - } - - return ucs4Char; -} - -static bool -dec_charbuf(const char *src, size_t srclen, char16_t *dst, size_t *dstlenp) -{ - uint32_t v; - size_t offset = 0; - size_t j; - size_t n; - size_t dstlen = *dstlenp; - size_t origDstlen = dstlen; - - if(!dst) dstlen = origDstlen = (size_t) -1; - - while(srclen) - { - v = (uint8_t) *src; - n = 1; - - if(v & 0x80) - { - while(v & (0x80 >> n)) - { - n++; - } - - if(n > srclen) goto buffer_too_small; - if(n == 1 || n > 6) goto bad_character; - - for(j = 1; j < n; j++) - { - if((src[j] & 0xC0) != 0x80) goto bad_character; - } - - v = dec_char((const uint8_t *) src, n); - if(v >= 0x10000) - { - v -= 0x10000; - - if(v > 0xFFFFF || dstlen < 2) - { - *dstlenp = (origDstlen - dstlen); - return false; - } - - if(dstlen < 2) goto buffer_too_small; - - if(dst) - { - *dst++ = (char16_t)((v >> 10) + 0xD800); - v = (char16_t)((v & 0x3FF) + 0xDC00); - } - dstlen--; - } - } - - if(!dstlen) goto buffer_too_small; - if(dst) *dst++ = (char16_t) v; - - dstlen--; - offset += n; - src += n; - srclen -= n; - } - - *dstlenp = (origDstlen - dstlen); - return true; - -bad_character: - *dstlenp = (origDstlen - dstlen); - return false; - -buffer_too_small: - *dstlenp = (origDstlen - dstlen); - return false; -} - -JSString* -dec_string(JSContext* cx, const char* bytes, size_t byteslen) -{ - JSString* str = NULL; - char16_t* chars = NULL; - size_t charslen; - - if(!dec_charbuf(bytes, byteslen, NULL, &charslen)) goto error; - - chars = (char16_t *)JS_malloc(cx, (charslen + 1) * sizeof(char16_t)); - if(!chars) return NULL; - chars[charslen] = 0; - - if(!dec_charbuf(bytes, byteslen, chars, &charslen)) goto error; - - str = JS_NewUCString(cx, chars, charslen - 1); - if(!str) goto error; - - goto success; - -error: - if(chars != NULL) JS_free(cx, chars); - str = NULL; - -success: - return str; -} |