Scarfski/assimp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fragmented FBX ASCII emdedded resource

Browse Source
This commit is contained in:
Mike Samsonov
2019-05-14 14:43:16 +01:00
parent 524d8c281e
commit c84ac7a135
6 changed files with 812 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
code/FBXUtil.cpp
View File

@@ -114,47 +114,65 @@ std::string AddTokenText(const std::string& prefix, const std::string& text, con
text) );
}
// Generated by this formula: T["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[i]] = i;
static const uint8_t base64DecodeTable[128] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 64, 0, 0,
0, 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, 0, 0, 0, 0, 0,
0, 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, 0, 0, 0, 0, 0
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
255, 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, 255, 255, 255, 255, 255,
255, 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, 255, 255, 255, 255, 255
};
uint8_t DecodeBase64(char ch)
{
return base64DecodeTable[size_t(ch)];
const auto idx = static_cast<uint8_t>(ch);
if (idx > 127)
return 255;
return base64DecodeTable[idx];
}
size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out)
size_t ComputeDecodedSizeBase64(const char* in, size_t inLength)
{
if (inLength < 4) {
out = 0;
if (inLength < 2)
{
return 0;
}
const size_t outLength = (inLength * 3) / 4;
out = new uint8_t[outLength];
memset(out, 0, outLength);
size_t i = 0;
size_t j = 0;
for (i = 0; i < inLength - 4; i += 4)
const size_t equals = size_t(in[inLength - 1] == '=') + size_t(in[inLength - 2] == '=');
const size_t full_length = (inLength * 3) >> 2; // div by 4
if (full_length < equals)
{
uint8_t b0 = Util::DecodeBase64(in[i]);
uint8_t b1 = Util::DecodeBase64(in[i + 1]);
uint8_t b2 = Util::DecodeBase64(in[i + 2]);
uint8_t b3 = Util::DecodeBase64(in[i + 3]);
out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
out[j++] = (uint8_t)((b2 << 6) | b3);
return 0;
}
return outLength;
return full_length - equals;
}
size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength)
{
if (maxOutLength == 0 || inLength < 2) {
return 0;
}
const size_t realLength = inLength - size_t(in[inLength - 1] == '=') - size_t(in[inLength - 2] == '=');
size_t dst_offset = 0;
int val = 0, valb = -8;
for (size_t src_offset = 0; src_offset < realLength; ++src_offset)
{
const uint8_t table_value = Util::DecodeBase64(in[src_offset]);
if (table_value == 255)
{
return 0;
}
val = (val << 6) + table_value;
valb += 6;
if (valb >= 0)
{
out[dst_offset++] = static_cast<uint8_t>((val >> valb) & 0xFF);
valb -= 8;
}
}
return dst_offset;
}
static const char to_base64_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";