本文整理汇总了C++中blob::exists方法的典型用法代码示例。如果您正苦于以下问题：C++ blob::exists方法的具体用法？C++ blob::exists怎么用？C++ blob::exists使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类blob的用法示例。
在下文中一共展示了blob::exists方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: base
index_blob::index_blob(size_t count, const blob & x)
: base(x), modified(false), resized(false), count(count)
{
indices = new sub[count];
if(!x.exists())
{
/* same as default constructor */
modified = true;
resized = true;
return;
}
size_t offset = count * sizeof(uint32_t);
for(size_t i = 0; i < count; i++)
{
uint32_t size = base.index<uint32_t>(i);
if(size)
{
indices[i].delayed = true;
indices[i]._size = --size;
indices[i]._offset = offset;
offset += size;
}
else
assert(!indices[i].value.exists());
}
}示例2: reject_iter
inline reject_iter(dtable::iter * base, dtable * rejects, blob reject_value)
: dtable_wrap_iter(base), rejects(rejects), reject_value(reject_value)
{
/* the reject value must exist, because nonexistent values
* can get pruned out if the shadow does not require them */
assert(reject_value.exists());
}示例3: insert
/* if we made a better find(), this could avoid flattening every time */
int simple_ctable::insert(const dtype & key, size_t column, const blob & value, bool append)
{
int r = 0;
assert(column < column_count);
blob row = base->find(key);
if(row.exists() || value.exists())
{
/* TODO: improve this... it is probably killing us */
index_blob sub(column_count, row);
sub.set(column, value);
r = base->insert(key, sub.flatten(), append);
}
return r;
}示例4: print
void print(const blob & x, const char * prefix, ...)
{
va_list ap;
va_start(ap, prefix);
if(!x.exists())
{
if(prefix)
vprintf(prefix, ap);
printf("(non-existent)\n");
va_end(ap);
return;
}
for(size_t i = 0; i < x.size(); i += 16)
{
size_t m = i + 16;
if(prefix)
vprintf(prefix, ap);
for(size_t j = i; j < m; j++)
{
if(j < x.size())
printf("%02x ", x[j]);
else
printf(" ");
if((i % 16) == 8)
printf(" ");
}
printf(" |");
for(size_t j = i; j < m; j++)
{
if(j < x.size())
printf("%c", isprint(x[j]) ? x[j] : '.');
else
printf(" ");
}
printf("|\n");
}
va_end(ap);
}