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Add io::istream::finished() method

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This commit is contained in:
Nikita Lisitsa 2023-12-03 20:31:48 +03:00
parent 8038da6987
commit a8fc4ea741
4 changed files with 14 additions and 0 deletions
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2
libs/io/include/psemek/io/file_stream.hpp
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@ -40,6 +40,8 @@ namespace psemek::io
std::size_t read(char * p, std::size_t size) override; std::size_t read(char * p, std::size_t size) override;
bool finished() const override;
~file_istream() override ~file_istream() override
{ {
reset(); reset();

5
libs/io/include/psemek/io/memory_stream.hpp
View file

@ -55,6 +55,11 @@ namespace psemek::io
std::size_t read(char * p, std::size_t size) override; std::size_t read(char * p, std::size_t size) override;
bool finished() const override
{
return begin_ == end_;
}
void advance(std::size_t n) void advance(std::size_t n)
{ {
if (end_ - begin_ < n) if (end_ - begin_ < n)

1
libs/io/include/psemek/io/stream.hpp
View file

@ -13,6 +13,7 @@ namespace psemek::io
{ {
virtual std::size_t read(char * p, std::size_t size) = 0; virtual std::size_t read(char * p, std::size_t size) = 0;
virtual std::size_t read_all(char * p, std::size_t size); virtual std::size_t read_all(char * p, std::size_t size);
virtual bool finished() const = 0;
virtual ~istream() {} virtual ~istream() {}
}; };

6
libs/io/source/file_stream.cpp
View file

@ -37,6 +37,12 @@ namespace psemek::io
return std::fread(p, 1, size, file_); return std::fread(p, 1, size, file_);
} }
bool file_istream::finished() const
{
if (!file_) throw null_istream{};
return std::feof(file_) != 0;
}
static char const * fopen_write_mode(unsigned flags) static char const * fopen_write_mode(unsigned flags)
{ {
switch (flags) switch (flags)