From 5ab1ec154375353077524e609da4e218f09d5acf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=D0=9F=D0=B5=D0=BB=D0=B8=D0=BF=D0=B5=D0=BD=D0=BA=D0=BE=20?= =?UTF-8?q?=D0=98=D0=B2=D0=B0=D0=BD?= Date: Fri, 19 Aug 2016 06:39:01 +0000 Subject: [PATCH] git-svn-id: svn://db.shs.com.ru/pip@229 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5 --- src/core/pibytearray.cpp | 183 +++++++++++++++++++++++++++------------ 1 file changed, 129 insertions(+), 54 deletions(-) diff --git a/src/core/pibytearray.cpp b/src/core/pibytearray.cpp index e69106f0..151a4b43 100755 --- a/src/core/pibytearray.cpp +++ b/src/core/pibytearray.cpp @@ -57,6 +57,85 @@ */ +static const uchar base64Table[64] = { +0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, +0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, +0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, +0x59, 0x5a, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, +0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, +0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, +0x77, 0x78, 0x79, 0x7a, 0x30, 0x31, 0x32, 0x33, +0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2b, 0x2f}; + +static const uchar base64InvTable[256] = { +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x3E, 0x0, 0x0, 0x0, 0x3F, +0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, +0x3C, 0x3D, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, +0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xD, 0xE, +0xF, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, +0x17, 0x18, 0x19, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, +0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, +0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, +0x31, 0x32, 0x33, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, +0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; + + +struct base64HelpStruct { + base64HelpStruct() {v = 0;} + inline void setBytes(const uchar * r, int size = 3) { + v = 0; + switch (size) { + case 3: v |= r[2]; + case 2: v |= r[1] << 8; + case 1: v |= r[0] << 16; + } + } + inline void getBytes(uchar * r) { + r[0] = (v >> 16) & 0xFF; + r[1] = (v >> 8) & 0xFF; + r[2] = v & 0xFF; + } + inline void setAscii(const uchar * r, int size = 4) { + v = 0; + switch (size) { + case 4: v |= (base64InvTable[r[3]] & 0x3F); + case 3: v |= (base64InvTable[r[2]] & 0x3F) << 6; + case 2: v |= (base64InvTable[r[1]] & 0x3F) << 12; + case 1: v |= (base64InvTable[r[0]] & 0x3F) << 18; + } + } + inline void getAscii(uchar * r) { + r[0] = base64Table[(v >> 18) & 0x3F]; + r[1] = base64Table[(v >> 12) & 0x3F]; + r[2] = base64Table[(v >> 6) & 0x3F]; + r[3] = base64Table[ v & 0x3F]; + } + uint v; +}; + + PIByteArray &PIByteArray::convertToBase64() { return *this = toBase64(); } @@ -68,65 +147,61 @@ PIByteArray &PIByteArray::convertFromBase64() { PIByteArray PIByteArray::toBase64() const { - const char alphabet[] = "ABCDEFGH" "IJKLMNOP" "QRSTUVWX" "YZabcdef" - "ghijklmn" "opqrstuv" "wxyz0123" "456789+/"; - const char padchar = '='; - int padlen = 0; - PIByteArray tmp((size() * 4) / 3 + 3); - int i = 0; - uchar *out = tmp.data(); - while (i < size_s()) { - int chunk = 0; - chunk |= int((*this)[i++]) << 16; - if (i == size()) { - padlen = 2; - } else { - chunk |= int((*this)[i++]) << 8; - if (i == size()) padlen = 1; - else chunk |= int((*this)[i++]); - } - int j = (chunk & 0x00fc0000) >> 18; - int k = (chunk & 0x0003f000) >> 12; - int l = (chunk & 0x00000fc0) >> 6; - int m = (chunk & 0x0000003f); - *out++ = alphabet[j]; - *out++ = alphabet[k]; - if (padlen > 1) *out++ = padchar; - else *out++ = alphabet[l]; - if (padlen > 0) *out++ = padchar; - else *out++ = alphabet[m]; + if (isEmpty()) return PIByteArray(); + base64HelpStruct hs; + PIByteArray ret; + int sz = (size_s() / 3) * 3, ri = -1; + uchar t[4]; + ret.resize(((size_s() - 1) / 3 + 1) * 4); + for (int i = 0; i < sz; i += 3) { + hs.setBytes(data(i)); + hs.getAscii(t); + ret[++ri] = (t[0]); + ret[++ri] = (t[1]); + ret[++ri] = (t[2]); + ret[++ri] = (t[3]); } - tmp.resize(out - tmp.data()); - return tmp; + int der = size_s() % 3; + switch (der) { + case 1: + hs.setBytes(data(sz), 1); + hs.getAscii(t); + ret[++ri] = (t[0]); + ret[++ri] = (t[1]); + ret[++ri] = ('='); + ret[++ri] = ('='); + break; + case 2: + hs.setBytes(data(sz), 2); + hs.getAscii(t); + ret[++ri] = (t[0]); + ret[++ri] = (t[1]); + ret[++ri] = (t[2]); + ret[++ri] = ('='); + break; + default: break; + } + return ret; } -PIByteArray PIByteArray::fromBase64(const PIByteArray &base64) { - unsigned int buf = 0; - int nbits = 0; - PIByteArray tmp((base64.size() * 3) / 4); - int offset = 0; - for (int i = 0; i < base64.size(); ++i) { - int ch = base64.at(i); - int d; - if (ch >= 'A' && ch <= 'Z') d = ch - 'A'; - else if (ch >= 'a' && ch <= 'z') d = ch - 'a' + 26; - else if (ch >= '0' && ch <= '9') d = ch - '0' + 52; - else if (ch == '+') d = 62; - else if (ch == '/') d = 63; - else d = -1; - if (d != -1) { - buf = (buf << 6) | d; - nbits += 6; - if (nbits >= 8) { - nbits -= 8; - tmp[offset++] = buf >> nbits; - buf &= (1 << nbits) - 1; - } - } +PIByteArray PIByteArray::fromBase64(const PIByteArray & base64) { + if (base64.isEmpty()) return PIByteArray(); + base64HelpStruct hs; + PIByteArray ret; + int sz = base64.size_s(), ind = -1; + uchar t[4]; + ret.resize(sz / 4 * 3); + for (int i = 0; i < sz; i += 4) { + hs.setAscii(base64.data(i)); + hs.getBytes(t); + ret[++ind] = (t[0]); + ret[++ind] = (t[1]); + ret[++ind] = (t[2]); } - tmp.resize(offset); - return tmp; + if (base64.back() == '=') ret.pop_back(); + if (sz > 1) if (base64[sz - 2] == '=') ret.pop_back(); + return ret; }