return GetCPFileNameFromRegistry(CodePage, NULL, 0);
}
-static const signed char
-base64inv[] =
+static inline BOOL utf7_write_w(WCHAR *dst, int dstlen, int *index, WCHAR character)
{
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
- -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1
-};
-
-static VOID Utf7Base64Decode(BYTE *pbDest, LPCSTR pszSrc, INT cchSrc)
-{
- INT i, j, n;
- BYTE b;
-
- for(i = 0; i < cchSrc / 4 * 4; i += 4)
+ if (dstlen > 0)
{
- for(j = n = 0; j < 4; )
- {
- b = (BYTE) base64inv[(BYTE) *pszSrc++];
- n |= (((INT) b) << ((3 - j) * 6));
- j++;
- }
- for(j = 0; j < 3; j++)
- *pbDest++ = (BYTE) ((n >> (8 * (2 - j))) & 0xFF);
- }
- for(j = n = 0; j < cchSrc % 4; )
- {
- b = (BYTE) base64inv[(BYTE) *pszSrc++];
- n |= (((INT) b) << ((3 - j) * 6));
- j++;
- }
- for(j = 0; j < ((cchSrc % 4) * 6 / 8); j++)
- *pbDest++ = (BYTE) ((n >> (8 * (2 - j))) & 0xFF);
-}
+ if (*index >= dstlen)
+ return FALSE;
-static VOID myswab(LPVOID pv, INT cw)
-{
- LPBYTE pb = (LPBYTE) pv;
- BYTE b;
- while(cw > 0)
- {
- b = *pb;
- *pb = pb[1];
- pb[1] = b;
- pb += 2;
- cw--;
+ dst[*index] = character;
}
+
+ (*index)++;
+
+ return TRUE;
}
-static INT Utf7ToWideCharSize(LPCSTR pszUtf7, INT cchUtf7)
+static INT Utf7ToWideChar(const char *src, int srclen, WCHAR *dst, int dstlen)
{
- INT n, c, cch;
- CHAR ch;
- LPCSTR pch;
-
- c = 0;
- while(cchUtf7 > 0)
+ static const signed char base64_decoding_table[] =
{
- ch = *pszUtf7++;
- if (ch == '+')
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0F */
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1F */
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20-0x2F */
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 0x30-0x3F */
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40-0x4F */
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50-0x5F */
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60-0x6F */
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1 /* 0x70-0x7F */
+ };
+
+ const char *source_end = src + srclen;
+ int dest_index = 0;
+
+ DWORD byte_pair = 0;
+ short offset = 0;
+
+ while (src < source_end)
+ {
+ if (*src == '+')
{
- ch = *pszUtf7;
- if (ch == '-')
+ src++;
+ if (src >= source_end)
+ break;
+
+ if (*src == '-')
{
- c++;
- pszUtf7++;
- cchUtf7 -= 2;
+ /* just a plus sign escaped as +- */
+ if (!utf7_write_w(dst, dstlen, &dest_index, '+'))
+ {
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ return 0;
+ }
+ src++;
continue;
}
- cchUtf7--;
- pch = pszUtf7;
- while(cchUtf7 > 0 && (BYTE) *pszUtf7 < 0x80 &&
- base64inv[*pszUtf7] >= 0)
- {
- cchUtf7--;
- pszUtf7++;
- }
- cch = pszUtf7 - pch;
- n = (cch * 3) / 8;
- c += n;
- if (cchUtf7 > 0 && *pszUtf7 == '-')
- {
- pszUtf7++;
- cchUtf7--;
- }
- }
- else
- {
- c++;
- cchUtf7--;
- }
- }
- return c;
-}
+ do
+ {
+ signed char sextet = *src;
+ if (sextet == '-')
+ {
+ /* skip over the dash and end base64 decoding
+ * the current, unfinished byte pair is discarded */
+ src++;
+ offset = 0;
+ break;
+ }
+ if (sextet < 0)
+ {
+ /* the next character of src is < 0 and therefore not part of a base64 sequence
+ * the current, unfinished byte pair is NOT discarded in this case
+ * this is probably a bug in Windows */
+ break;
+ }
-static INT Utf7ToWideChar(LPCSTR pszUtf7, INT cchUtf7, LPWSTR pszWide, INT cchWide)
-{
- INT n, c, cch;
- CHAR ch;
- LPCSTR pch;
- WORD *pwsz;
+ sextet = base64_decoding_table[sextet];
+ if (sextet == -1)
+ {
+ /* -1 means that the next character of src is not part of a base64 sequence
+ * in other words, all sextets in this base64 sequence have been processed
+ * the current, unfinished byte pair is discarded */
+ offset = 0;
+ break;
+ }
- c = Utf7ToWideCharSize(pszUtf7, cchUtf7);
- if (cchWide == 0)
- return c;
+ byte_pair = (byte_pair << 6) | sextet;
+ offset += 6;
- if (cchWide < c)
- {
- SetLastError(ERROR_INSUFFICIENT_BUFFER);
- return 0;
- }
+ if (offset >= 16)
+ {
+ /* this byte pair is done */
+ if (!utf7_write_w(dst, dstlen, &dest_index, (byte_pair >> (offset - 16)) & 0xFFFF))
+ {
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ return 0;
+ }
+ offset -= 16;
+ }
- while(cchUtf7 > 0)
- {
- ch = *pszUtf7++;
- if (ch == '+')
- {
- if (*pszUtf7 == '-')
- {
- *pszWide++ = L'+';
- pszUtf7++;
- cchUtf7 -= 2;
- continue;
- }
- cchUtf7--;
- pch = pszUtf7;
- while(cchUtf7 > 0 && (BYTE) *pszUtf7 < 0x80 &&
- base64inv[*pszUtf7] >= 0)
- {
- cchUtf7--;
- pszUtf7++;
- }
- cch = pszUtf7 - pch;
- n = (cch * 3) / 8;
- pwsz = (WORD *) HeapAlloc(GetProcessHeap(), 0, (n + 1) * sizeof(WORD));
- if (pwsz == NULL)
- return 0;
- ZeroMemory(pwsz, n * sizeof(WORD));
- Utf7Base64Decode((BYTE *) pwsz, pch, cch);
- myswab(pwsz, n);
- CopyMemory(pszWide, pwsz, n * sizeof(WORD));
- HeapFree(GetProcessHeap(), 0, pwsz);
- pszWide += n;
- if (cchUtf7 > 0 && *pszUtf7 == '-')
- {
- pszUtf7++;
- cchUtf7--;
+ src++;
}
+ while (src < source_end);
}
else
{
- *pszWide++ = (WCHAR) ch;
- cchUtf7--;
+ /* we have to convert to unsigned char in case *src < 0 */
+ if (!utf7_write_w(dst, dstlen, &dest_index, (unsigned char)*src))
+ {
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ return 0;
+ }
+ src++;
}
}
- return c;
+ return dest_index;
}
/**
projects / reactos.git / commitdiff