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Add Base64 tests and fix a couple of bugs found.

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Change-Id: I9762fe018be78cf38aa506026e78139e2479cd98
This commit is contained in:
Peter Johnson
2015-07-03 17:13:08 -07:00
parent 5a0fccc9cf
commit c7b5266f9a
2 changed files with 75 additions and 10 deletions
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23
src/Base64.cpp
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@@ -91,7 +91,7 @@ static const unsigned char pr2six[256] =
std::size_t Base64Decode(llvm::StringRef encoded, std::string* plain) {
const unsigned char *bufin = encoded.bytes_begin();
while (pr2six[*bufin] <= 63 && bufin != encoded.bytes_end()) ++bufin;
std::size_t nprbytes = (bufin - encoded.bytes_begin()) - 1;
std::size_t nprbytes = bufin - encoded.bytes_begin();
std::size_t nbytesdecoded = ((nprbytes + 3) / 4) * 3;
plain->clear();
@@ -121,18 +121,21 @@ static const char basis_64[] =
void Base64Encode(llvm::StringRef plain, std::string* encoded) {
encoded->clear();
if (plain.empty())
return;
std::size_t len = plain.size();
encoded->reserve(((len + 2) / 3 * 4) + 1);
std::size_t i;
for (i = 0; i < len - 2; i += 3) {
(*encoded) += basis_64[(plain[i] >> 2) & 0x3F];
(*encoded) +=
basis_64[((plain[i] & 0x3) << 4) | ((int)(plain[i + 1] & 0xF0) >> 4)];
(*encoded) += basis_64[((plain[i + 1] & 0xF) << 2) |
((int)(plain[i + 2] & 0xC0) >> 6)];
(*encoded) += basis_64[plain[i + 2] & 0x3F];
}
std::size_t i = 0;
if (len >= 2)
for (; i < len - 2; i += 3) {
(*encoded) += basis_64[(plain[i] >> 2) & 0x3F];
(*encoded) +=
basis_64[((plain[i] & 0x3) << 4) | ((int)(plain[i + 1] & 0xF0) >> 4)];
(*encoded) += basis_64[((plain[i + 1] & 0xF) << 2) |
((int)(plain[i + 2] & 0xC0) >> 6)];
(*encoded) += basis_64[plain[i + 2] & 0x3F];
}
if (i < len) {
(*encoded) += basis_64[(plain[i] >> 2) & 0x3F];
if (i == (len - 1)) {