apio
da61e3648f
This is a huge step forward!! bc actually runs now, without echo or backspace, but it runs!!
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#define MODULE "kbd"
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#include "fs/devices/Keyboard.h"
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#include "config.h"
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#include "log/Log.h"
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#include "render/TextRenderer.h"
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#include "std/stdio.h"
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#include "std/stdlib.h"
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#include "std/string.h"
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char* kbd_buffer = nullptr;
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uint64_t kbd_bufsize = 0;
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int KeyboardDevice::would_block(VFS::Node*)
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{
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return kbd_bufsize == 0;
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}
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VFS::Node* KeyboardDevice::create_new(const char* devname)
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{
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VFS::Node* dev = new VFS::Node;
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dev->read_func = KeyboardDevice::read;
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dev->block_func = KeyboardDevice::would_block;
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dev->inode = 0;
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dev->length = 0;
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dev->type = VFS_DEVICE;
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dev->flags = 0;
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dev->tty = 1;
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strncpy(dev->name, devname, sizeof(dev->name));
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return dev;
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}
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ssize_t KeyboardDevice::read(VFS::Node* node, size_t, size_t size, char* buffer)
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{
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if (!node) return -1;
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if (!kbd_buffer) return 0;
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if (size > kbd_bufsize) size = kbd_bufsize;
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memcpy(buffer, kbd_buffer, size);
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memmove(kbd_buffer, kbd_buffer + size, kbd_bufsize - size);
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kbd_bufsize -= size;
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kbd_buffer = (char*)krealloc(kbd_buffer, kbd_bufsize);
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return (ssize_t)size;
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}
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void KeyboardDevice::append(char c)
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{
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kbd_bufsize++;
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kbd_buffer = (char*)krealloc(
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kbd_buffer, kbd_bufsize); // FIXME: We should probably not be calling realloc every time a key is pressed.
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kbd_buffer[kbd_bufsize - 1] = c;
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} |