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LibC: Implement __freadptr

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This commit is contained in:
Tim Schumacher 2021-11-07 17:09:51 +01:00 • committed by Andreas Kling
parent 8da0cf7912
commit 9b543ddb16
3 changed files with 26 additions and 0 deletions
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2
Userland/Libraries/LibC/bits/stdio_file_implementation.h
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@ -61,6 +61,8 @@ public:
void reopen(int fd, int mode); void reopen(int fd, int mode);
u8 const* readptr(size_t& available_size);
enum Flags : u8 { enum Flags : u8 {
None = 0, None = 0,
LastRead = 1, LastRead = 1,

22
Userland/Libraries/LibC/stdio.cpp
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@ -369,6 +369,11 @@ void FILE::reopen(int fd, int mode)
m_eof = false; m_eof = false;
} }
u8 const* FILE::readptr(size_t& available_size)
{
return m_buffer.begin_dequeue(available_size);
}
FILE::Buffer::~Buffer() FILE::Buffer::~Buffer()
{ {
if (m_data_is_malloced) if (m_data_is_malloced)
@ -1322,6 +1327,23 @@ void __fpurge(FILE* stream)
ScopedFileLock lock(stream); ScopedFileLock lock(stream);
stream->purge(); stream->purge();
} }
char const* __freadptr(FILE* stream, size_t* sizep)
{
VERIFY(stream);
VERIFY(sizep);
ScopedFileLock lock(stream);
size_t available_size;
u8 const* ptr = stream->readptr(available_size);
if (available_size == 0)
return nullptr;
*sizep = available_size;
return reinterpret_cast<char const*>(ptr);
}
} }
template bool FILE::gets<u8>(u8*, size_t); template bool FILE::gets<u8>(u8*, size_t);

2
Userland/Libraries/LibC/stdio_ext.h
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@ -15,4 +15,6 @@ int __freading(FILE*);
int __fwriting(FILE*); int __fwriting(FILE*);
void __fpurge(FILE*); void __fpurge(FILE*);
char const* __freadptr(FILE*, size_t*);
__END_DECLS __END_DECLS