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Switched the utf bom checking to putback in the stream (instead of keeping a secondary buffer), which fixes a bug when there's only one ascii character

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This commit is contained in:
Jesse Beder
2011-10-20 22:29:41 -05:00
parent e8e5d4bc40
commit 860365b263
2 changed files with 7 additions and 17 deletions
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20
src/stream.cpp
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@@ -178,7 +178,7 @@ namespace YAML
}
Stream::Stream(std::istream& input)
: m_input(input), m_nPushedBack(0),
: m_input(input),
m_pPrefetched(new unsigned char[YAML_PREFETCH_SIZE]),
m_nPrefetchedAvailable(0), m_nPrefetchedUsed(0)
{
@@ -192,18 +192,17 @@ namespace YAML
char_traits::int_type intro[4];
int nIntroUsed = 0;
UtfIntroState state = uis_start;
for (; !s_introFinalState[state]; ) {
for(; !s_introFinalState[state]; ) {
std::istream::int_type ch = input.get();
intro[nIntroUsed++] = ch;
UtfIntroCharType charType = IntroCharTypeOf(ch);
UtfIntroState newState = s_introTransitions[state][charType];
int nUngets = s_introUngetCount[state][charType];
if (nUngets > 0) {
for (; nUngets > 0; --nUngets) {
if (char_traits::eof() != intro[--nIntroUsed]) {
m_bufPushback[m_nPushedBack++] =
char_traits::to_char_type(intro[nIntroUsed]);
}
if(nUngets > 0) {
input.clear();
for(; nUngets > 0; --nUngets) {
if(char_traits::eof() != intro[--nIntroUsed])
input.putback(char_traits::to_char_type(intro[nIntroUsed]));
}
}
state = newState;
@@ -398,11 +397,6 @@ namespace YAML
unsigned char Stream::GetNextByte() const
{
if (m_nPushedBack)
{
return m_bufPushback[--m_nPushedBack];
}
if (m_nPrefetchedUsed >= m_nPrefetchedAvailable)
{
std::streambuf *pBuf = m_input.rdbuf();