58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
#include "fs/FileDescriptor.h"
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#include "std/errno.h"
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Descriptor::Descriptor() : m_is_open(false)
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{
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}
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Descriptor::Descriptor(const Descriptor& other)
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: m_is_open(other.m_is_open), m_can_read(other.m_can_read), m_can_write(other.m_can_write),
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m_able_to_block(other.m_able_to_block), m_close_on_exec(other.m_close_on_exec), m_node(other.m_node),
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m_offset(other.m_offset)
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{
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}
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void Descriptor::open(VFS::Node* node, bool can_read, bool can_write, bool able_to_block, bool close_on_exec)
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{
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m_can_read = can_read;
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m_can_write = can_write;
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m_able_to_block = able_to_block;
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m_close_on_exec = close_on_exec;
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m_node = node;
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m_offset = 0;
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m_is_open = true;
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}
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ssize_t Descriptor::read(size_t size, char* buffer)
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{
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ssize_t result = VFS::read(m_node, m_offset, size, buffer);
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m_offset += result;
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return result;
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}
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ssize_t Descriptor::write(size_t size, const char* buffer)
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{
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ssize_t result = VFS::write(m_node, m_offset, size, buffer);
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m_offset += result;
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return result;
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}
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int Descriptor::seek(long offset)
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{
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if (m_node->type == VFS_FILE && (uint64_t)offset > m_node->length)
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return -EINVAL; // FIXME: Support seeking beyond the current file's length.
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m_offset = (uint64_t)offset;
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return 0;
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}
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const Descriptor& Descriptor::operator=(const Descriptor& other)
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{
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m_is_open = other.m_is_open;
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m_can_read = other.m_can_read;
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m_can_write = other.m_can_write;
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m_offset = other.m_offset;
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m_node = other.m_node;
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m_able_to_block = other.m_able_to_block;
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m_close_on_exec = other.m_close_on_exec;
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return other;
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} |