utf8.c

来自「支持SSL v2/v3, TLS, PKCS #5, PKCS #7, PKCS」· C语言 代码 · 共 2,062 行 · 第 1/5 页

        /* 1110abcd 10efghij 10klmnop -> abcdefgh ijklmnop */

        outBuf[len+H_0] = ((inBuf[i+0] & 0x0F) << 4) | ((inBuf[i+1] & 0x3C) >> 2);
        outBuf[len+H_1] = ((inBuf[i+1] & 0x03) << 6) | ((inBuf[i+2] & 0x3F) >> 0);

        i += 3;
        len += 2;
#ifdef UTF16
      } else if( (inBuf[i] & 0xF8) == 0xF0 ) { 
        int abcde, BCDE;

        if( (inBuf[i+1] & 0xC0) != 0x80 ) return PR_FALSE;
        if( (inBuf[i+2] & 0xC0) != 0x80 ) return PR_FALSE;
        if( (inBuf[i+3] & 0xC0) != 0x80 ) return PR_FALSE;

        /* 0001 0000-001F FFFF <- 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
        /* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx -> [D800-DBFF] [DC00-DFFF] */
           
        /* 11110abc 10defghi 10jklmno 10pqrstu -> 
           { Let 0BCDE = abcde - 1 }
           110110BC DEfghijk 110111lm nopqrstu */

        abcde = ((inBuf[i+0] & 0x07) << 2) | ((inBuf[i+1] & 0x30) >> 4);
        BCDE = abcde - 1;

#ifndef TEST_UTF8
        PORT_Assert(BCDE < 0x10); /* should have been caught above */
#endif /* TEST_UTF8 */

        outBuf[len+0+H_0] = 0xD8 | ((BCDE & 0x0C) >> 2);
        outBuf[len+0+H_1] = ((BCDE & 0x03) << 6) 
                      | ((inBuf[i+1] & 0x0F) << 2)
                      | ((inBuf[i+2] & 0x30) >> 4);
        outBuf[len+2+H_0] = 0xDC | ((inBuf[i+2] & 0x0C) >> 2);
        outBuf[len+2+H_1] = ((inBuf[i+2] & 0x03) << 6) | ((inBuf[i+3] & 0x3F) >> 0);

        i += 4;
        len += 4;
#endif /* UTF16 */
      } else return PR_FALSE;
    }

    *outBufLen = len;
    return PR_TRUE;
  } else {
    unsigned int i, len = 0;

    for( i = 0; i < inBufLen; i += 2 ) {
      if( (inBuf[i+H_0] == 0x00) && ((inBuf[i+H_0] & 0x80) == 0x00) ) len += 1;
      else if( inBuf[i+H_0] < 0x08 ) len += 2;
#ifdef UTF16
      else if( ((inBuf[i+0+H_0] & 0xDC) == 0xD8) ) {
        if( ((inBuf[i+2+H_0] & 0xDC) == 0xDC) && ((inBufLen - i) > 2) ) {
          i += 2;
          len += 4;
        } else {
          return PR_FALSE;
        }
      }
#endif /* UTF16 */
      else len += 3;
    }

    if( len > maxOutBufLen ) {
      *outBufLen = len;
      return PR_FALSE;
    }

    len = 0;

    for( i = 0; i < inBufLen; i += 2 ) {
      if( (inBuf[i+H_0] == 0x00) && ((inBuf[i+H_1] & 0x80) == 0x00) ) {
        /* 0000-007F -> 0xxxxxx */
        /* 00000000 0abcdefg -> 0abcdefg */

        outBuf[len] = inBuf[i+H_1] & 0x7F;

        len += 1;
      } else if( inBuf[i+H_0] < 0x08 ) {
        /* 0080-07FF -> 110xxxxx 10xxxxxx */
        /* 00000abc defghijk -> 110abcde 10fghijk */

        outBuf[len+0] = 0xC0 | ((inBuf[i+H_0] & 0x07) << 2) 
                             | ((inBuf[i+H_1] & 0xC0) >> 6);
        outBuf[len+1] = 0x80 | ((inBuf[i+H_1] & 0x3F) >> 0);

        len += 2;
#ifdef UTF16
      } else if( (inBuf[i+H_0] & 0xDC) == 0xD8 ) {
        int abcde, BCDE;

#ifndef TEST_UTF8
        PORT_Assert(((inBuf[i+2+H_0] & 0xDC) == 0xDC) && ((inBufLen - i) > 2));
#endif /* TEST_UTF8 */

        /* D800-DBFF DC00-DFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
        /* 110110BC DEfghijk 110111lm nopqrstu ->
           { Let abcde = BCDE + 1 }
           11110abc 10defghi 10jklmno 10pqrstu */

        BCDE = ((inBuf[i+H_0] & 0x03) << 2) | ((inBuf[i+H_1] & 0xC0) >> 6);
        abcde = BCDE + 1;

        outBuf[len+0] = 0xF0 | ((abcde & 0x1C) >> 2);
        outBuf[len+1] = 0x80 | ((abcde & 0x03) << 4) 
                             | ((inBuf[i+0+H_1] & 0x3C) >> 2);
        outBuf[len+2] = 0x80 | ((inBuf[i+0+H_1] & 0x03) << 4)
                             | ((inBuf[i+2+H_0] & 0x03) << 2)
                             | ((inBuf[i+2+H_1] & 0xC0) >> 6);
        outBuf[len+3] = 0x80 | ((inBuf[i+2+H_1] & 0x3F) >> 0);

        i += 2;
        len += 4;
#endif /* UTF16 */
      } else {
        /* 0800-FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
        /* abcdefgh ijklmnop -> 1110abcd 10efghij 10klmnop */

        outBuf[len+0] = 0xE0 | ((inBuf[i+H_0] & 0xF0) >> 4);
        outBuf[len+1] = 0x80 | ((inBuf[i+H_0] & 0x0F) << 2) 
                             | ((inBuf[i+H_1] & 0xC0) >> 6);
        outBuf[len+2] = 0x80 | ((inBuf[i+H_1] & 0x3F) >> 0);

        len += 3;
      }
    }

    *outBufLen = len;
    return PR_TRUE;
  }
}

#ifdef TEST_UTF8

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h> /* for htonl and htons */

/*
 * UCS-4 vectors
 */

struct ucs4 {
  PRUint32 c;
  char *utf8;
};

/*
 * UCS-2 vectors
 */

struct ucs2 {
  PRUint16 c;
  char *utf8;
};

#ifdef UTF16
/*
 * UTF-16 vectors
 */

struct utf16 {
  PRUint32 c;
  PRUint16 w[2];
};
#endif /* UTF16 */


/*
 * UCS-4 vectors
 */

struct ucs4 ucs4[] = {
  { 0x00000001, "\x01" },
  { 0x00000002, "\x02" },
  { 0x00000003, "\x03" },
  { 0x00000004, "\x04" },
  { 0x00000007, "\x07" },
  { 0x00000008, "\x08" },
  { 0x0000000F, "\x0F" },
  { 0x00000010, "\x10" },
  { 0x0000001F, "\x1F" },
  { 0x00000020, "\x20" },
  { 0x0000003F, "\x3F" },
  { 0x00000040, "\x40" },
  { 0x0000007F, "\x7F" },
          
  { 0x00000080, "\xC2\x80" },
  { 0x00000081, "\xC2\x81" },
  { 0x00000082, "\xC2\x82" },
  { 0x00000084, "\xC2\x84" },
  { 0x00000088, "\xC2\x88" },
  { 0x00000090, "\xC2\x90" },
  { 0x000000A0, "\xC2\xA0" },
  { 0x000000C0, "\xC3\x80" },
  { 0x000000FF, "\xC3\xBF" },
  { 0x00000100, "\xC4\x80" },
  { 0x00000101, "\xC4\x81" },
  { 0x00000102, "\xC4\x82" },
  { 0x00000104, "\xC4\x84" },
  { 0x00000108, "\xC4\x88" },
  { 0x00000110, "\xC4\x90" },
  { 0x00000120, "\xC4\xA0" },
  { 0x00000140, "\xC5\x80" },
  { 0x00000180, "\xC6\x80" },
  { 0x000001FF, "\xC7\xBF" },
  { 0x00000200, "\xC8\x80" },
  { 0x00000201, "\xC8\x81" },
  { 0x00000202, "\xC8\x82" },
  { 0x00000204, "\xC8\x84" },
  { 0x00000208, "\xC8\x88" },
  { 0x00000210, "\xC8\x90" },
  { 0x00000220, "\xC8\xA0" },
  { 0x00000240, "\xC9\x80" },
  { 0x00000280, "\xCA\x80" },
  { 0x00000300, "\xCC\x80" },
  { 0x000003FF, "\xCF\xBF" },
  { 0x00000400, "\xD0\x80" },
  { 0x00000401, "\xD0\x81" },
  { 0x00000402, "\xD0\x82" },
  { 0x00000404, "\xD0\x84" },
  { 0x00000408, "\xD0\x88" },
  { 0x00000410, "\xD0\x90" },
  { 0x00000420, "\xD0\xA0" },
  { 0x00000440, "\xD1\x80" },
  { 0x00000480, "\xD2\x80" },
  { 0x00000500, "\xD4\x80" },
  { 0x00000600, "\xD8\x80" },
  { 0x000007FF, "\xDF\xBF" },
          
  { 0x00000800, "\xE0\xA0\x80" },
  { 0x00000801, "\xE0\xA0\x81" },
  { 0x00000802, "\xE0\xA0\x82" },
  { 0x00000804, "\xE0\xA0\x84" },
  { 0x00000808, "\xE0\xA0\x88" },
  { 0x00000810, "\xE0\xA0\x90" },
  { 0x00000820, "\xE0\xA0\xA0" },
  { 0x00000840, "\xE0\xA1\x80" },
  { 0x00000880, "\xE0\xA2\x80" },
  { 0x00000900, "\xE0\xA4\x80" },
  { 0x00000A00, "\xE0\xA8\x80" },
  { 0x00000C00, "\xE0\xB0\x80" },
  { 0x00000FFF, "\xE0\xBF\xBF" },
  { 0x00001000, "\xE1\x80\x80" },
  { 0x00001001, "\xE1\x80\x81" },
  { 0x00001002, "\xE1\x80\x82" },
  { 0x00001004, "\xE1\x80\x84" },
  { 0x00001008, "\xE1\x80\x88" },
  { 0x00001010, "\xE1\x80\x90" },
  { 0x00001020, "\xE1\x80\xA0" },
  { 0x00001040, "\xE1\x81\x80" },
  { 0x00001080, "\xE1\x82\x80" },
  { 0x00001100, "\xE1\x84\x80" },
  { 0x00001200, "\xE1\x88\x80" },
  { 0x00001400, "\xE1\x90\x80" },
  { 0x00001800, "\xE1\xA0\x80" },
  { 0x00001FFF, "\xE1\xBF\xBF" },
  { 0x00002000, "\xE2\x80\x80" },
  { 0x00002001, "\xE2\x80\x81" },
  { 0x00002002, "\xE2\x80\x82" },
  { 0x00002004, "\xE2\x80\x84" },
  { 0x00002008, "\xE2\x80\x88" },
  { 0x00002010, "\xE2\x80\x90" },
  { 0x00002020, "\xE2\x80\xA0" },
  { 0x00002040, "\xE2\x81\x80" },
  { 0x00002080, "\xE2\x82\x80" },
  { 0x00002100, "\xE2\x84\x80" },
  { 0x00002200, "\xE2\x88\x80" },
  { 0x00002400, "\xE2\x90\x80" },
  { 0x00002800, "\xE2\xA0\x80" },
  { 0x00003000, "\xE3\x80\x80" },
  { 0x00003FFF, "\xE3\xBF\xBF" },
  { 0x00004000, "\xE4\x80\x80" },
  { 0x00004001, "\xE4\x80\x81" },
  { 0x00004002, "\xE4\x80\x82" },
  { 0x00004004, "\xE4\x80\x84" },
  { 0x00004008, "\xE4\x80\x88" },
  { 0x00004010, "\xE4\x80\x90" },
  { 0x00004020, "\xE4\x80\xA0" },
  { 0x00004040, "\xE4\x81\x80" },
  { 0x00004080, "\xE4\x82\x80" },
  { 0x00004100, "\xE4\x84\x80" },
  { 0x00004200, "\xE4\x88\x80" },
  { 0x00004400, "\xE4\x90\x80" },
  { 0x00004800, "\xE4\xA0\x80" },
  { 0x00005000, "\xE5\x80\x80" },
  { 0x00006000, "\xE6\x80\x80" },
  { 0x00007FFF, "\xE7\xBF\xBF" },
  { 0x00008000, "\xE8\x80\x80" },
  { 0x00008001, "\xE8\x80\x81" },
  { 0x00008002, "\xE8\x80\x82" },
  { 0x00008004, "\xE8\x80\x84" },
  { 0x00008008, "\xE8\x80\x88" },
  { 0x00008010, "\xE8\x80\x90" },
  { 0x00008020, "\xE8\x80\xA0" },
  { 0x00008040, "\xE8\x81\x80" },
  { 0x00008080, "\xE8\x82\x80" },
  { 0x00008100, "\xE8\x84\x80" },
  { 0x00008200, "\xE8\x88\x80" },
  { 0x00008400, "\xE8\x90\x80" },
  { 0x00008800, "\xE8\xA0\x80" },
  { 0x00009000, "\xE9\x80\x80" },
  { 0x0000A000, "\xEA\x80\x80" },
  { 0x0000C000, "\xEC\x80\x80" },
  { 0x0000FFFF, "\xEF\xBF\xBF" },
          
  { 0x00010000, "\xF0\x90\x80\x80" },
  { 0x00010001, "\xF0\x90\x80\x81" },
  { 0x00010002, "\xF0\x90\x80\x82" },
  { 0x00010004, "\xF0\x90\x80\x84" },
  { 0x00010008, "\xF0\x90\x80\x88" },
  { 0x00010010, "\xF0\x90\x80\x90" },
  { 0x00010020, "\xF0\x90\x80\xA0" },
  { 0x00010040, "\xF0\x90\x81\x80" },
  { 0x00010080, "\xF0\x90\x82\x80" },
  { 0x00010100, "\xF0\x90\x84\x80" },
  { 0x00010200, "\xF0\x90\x88\x80" },
  { 0x00010400, "\xF0\x90\x90\x80" },
  { 0x00010800, "\xF0\x90\xA0\x80" },
  { 0x00011000, "\xF0\x91\x80\x80" },
  { 0x00012000, "\xF0\x92\x80\x80" },
  { 0x00014000, "\xF0\x94\x80\x80" },
  { 0x00018000, "\xF0\x98\x80\x80" },
  { 0x0001FFFF, "\xF0\x9F\xBF\xBF" },
  { 0x00020000, "\xF0\xA0\x80\x80" },
  { 0x00020001, "\xF0\xA0\x80\x81" },
  { 0x00020002, "\xF0\xA0\x80\x82" },
  { 0x00020004, "\xF0\xA0\x80\x84" },
  { 0x00020008, "\xF0\xA0\x80\x88" },
  { 0x00020010, "\xF0\xA0\x80\x90" },
  { 0x00020020, "\xF0\xA0\x80\xA0" },
  { 0x00020040, "\xF0\xA0\x81\x80" },
  { 0x00020080, "\xF0\xA0\x82\x80" },
  { 0x00020100, "\xF0\xA0\x84\x80" },
  { 0x00020200, "\xF0\xA0\x88\x80" },
  { 0x00020400, "\xF0\xA0\x90\x80" },
  { 0x00020800, "\xF0\xA0\xA0\x80" },
  { 0x00021000, "\xF0\xA1\x80\x80" },
  { 0x00022000, "\xF0\xA2\x80\x80" },
  { 0x00024000, "\xF0\xA4\x80\x80" },
  { 0x00028000, "\xF0\xA8\x80\x80" },
  { 0x00030000, "\xF0\xB0\x80\x80" },
  { 0x0003FFFF, "\xF0\xBF\xBF\xBF" },
  { 0x00040000, "\xF1\x80\x80\x80" },
  { 0x00040001, "\xF1\x80\x80\x81" },
  { 0x00040002, "\xF1\x80\x80\x82" },
  { 0x00040004, "\xF1\x80\x80\x84" },
  { 0x00040008, "\xF1\x80\x80\x88" },
  { 0x00040010, "\xF1\x80\x80\x90" },
  { 0x00040020, "\xF1\x80\x80\xA0" },
  { 0x00040040, "\xF1\x80\x81\x80" },
  { 0x00040080, "\xF1\x80\x82\x80" },
  { 0x00040100, "\xF1\x80\x84\x80" },
  { 0x00040200, "\xF1\x80\x88\x80" },
  { 0x00040400, "\xF1\x80\x90\x80" },
  { 0x00040800, "\xF1\x80\xA0\x80" },
  { 0x00041000, "\xF1\x81\x80\x80" },
  { 0x00042000, "\xF1\x82\x80\x80" },
  { 0x00044000, "\xF1\x84\x80\x80" },
  { 0x00048000, "\xF1\x88\x80\x80" },
  { 0x00050000, "\xF1\x90\x80\x80" },
  { 0x00060000, "\xF1\xA0\x80\x80" },
  { 0x0007FFFF, "\xF1\xBF\xBF\xBF" },
  { 0x00080000, "\xF2\x80\x80\x80" },
  { 0x00080001, "\xF2\x80\x80\x81" },
  { 0x00080002, "\xF2\x80\x80\x82" },
  { 0x00080004, "\xF2\x80\x80\x84" },
  { 0x00080008, "\xF2\x80\x80\x88" },
  { 0x00080010, "\xF2\x80\x80\x90" },
  { 0x00080020, "\xF2\x80\x80\xA0" },
  { 0x00080040, "\xF2\x80\x81\x80" },
  { 0x00080080, "\xF2\x80\x82\x80" },
  { 0x00080100, "\xF2\x80\x84\x80" },
  { 0x00080200, "\xF2\x80\x88\x80" },
  { 0x00080400, "\xF2\x80\x90\x80" },
  { 0x00080800, "\xF2\x80\xA0\x80" },
  { 0x00081000, "\xF2\x81\x80\x80" },
  { 0x00082000, "\xF2\x82\x80\x80" },
  { 0x00084000, "\xF2\x84\x80\x80" },
  { 0x00088000, "\xF2\x88\x80\x80" },
  { 0x00090000, "\xF2\x90\x80\x80" },
  { 0x000A0000, "\xF2\xA0\x80\x80" },
  { 0x000C0000, "\xF3\x80\x80\x80" },
  { 0x000FFFFF, "\xF3\xBF\xBF\xBF" },
  { 0x00100000, "\xF4\x80\x80\x80" },
  { 0x00100001, "\xF4\x80\x80\x81" },
  { 0x00100002, "\xF4\x80\x80\x82" },
  { 0x00100004, "\xF4\x80\x80\x84" },
  { 0x00100008, "\xF4\x80\x80\x88" },
  { 0x00100010, "\xF4\x80\x80\x90" },
  { 0x00100020, "\xF4\x80\x80\xA0" },
  { 0x00100040, "\xF4\x80\x81\x80" },
  { 0x00100080, "\xF4\x80\x82\x80" },
  { 0x00100100, "\xF4\x80\x84\x80" },
  { 0x00100200, "\xF4\x80\x88\x80" },
  { 0x00100400, "\xF4\x80\x90\x80" },
  { 0x00100800, "\xF4\x80\xA0\x80" },
  { 0x00101000, "\xF4\x81\x80\x80" },
  { 0x00102000, "\xF4\x82\x80\x80" },
  { 0x00104000, "\xF4\x84\x80\x80" },
  { 0x00108000, "\xF4\x88\x80\x80" },
  { 0x00110000, "\xF4\x90\x80\x80" },
  { 0x00120000, "\xF4\xA0\x80\x80" },
  { 0x00140000, "\xF5\x80\x80\x80" },
  { 0x00180000, "\xF6\x80\x80\x80" },
  { 0x001FFFFF, "\xF7\xBF\xBF\xBF" },
          
  { 0x00200000, "\xF8\x88\x80\x80\x80" },
  { 0x00200001, "\xF8\x88\x80\x80\x81" },
  { 0x00200002, "\xF8\x88\x80\x80\x82" },
  { 0x00200004, "\xF8\x88\x80\x80\x84" },
  { 0x00200008, "\xF8\x88\x80\x80\x88" },