480 lines
12 KiB
C
480 lines
12 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <lib/readline.h>
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#include <lib/libc.h>
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#include <lib/misc.h>
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#include <lib/term.h>
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#include <lib/print.h>
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#if defined (BIOS)
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# include <lib/real.h>
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#elif defined (UEFI)
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# include <efi.h>
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#endif
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#include <drivers/serial.h>
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#include <sys/cpu.h>
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int getchar(void) {
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for (;;) {
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int ret = pit_sleep_and_quit_on_keypress(65535);
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if (ret != 0) {
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return ret;
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}
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}
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}
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int getchar_internal(uint8_t scancode, uint8_t ascii, uint32_t shift_state) {
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switch (scancode) {
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#if defined (BIOS)
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case 0x44:
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return GETCHAR_F10;
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case 0x4b:
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return GETCHAR_CURSOR_LEFT;
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case 0x4d:
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return GETCHAR_CURSOR_RIGHT;
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case 0x48:
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return GETCHAR_CURSOR_UP;
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case 0x50:
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return GETCHAR_CURSOR_DOWN;
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case 0x53:
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return GETCHAR_DELETE;
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case 0x4f:
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return GETCHAR_END;
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case 0x47:
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return GETCHAR_HOME;
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case 0x49:
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return GETCHAR_PGUP;
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case 0x51:
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return GETCHAR_PGDOWN;
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case 0x01:
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return GETCHAR_ESCAPE;
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#elif defined (UEFI)
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case SCAN_F10:
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return GETCHAR_F10;
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case SCAN_LEFT:
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return GETCHAR_CURSOR_LEFT;
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case SCAN_RIGHT:
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return GETCHAR_CURSOR_RIGHT;
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case SCAN_UP:
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return GETCHAR_CURSOR_UP;
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case SCAN_DOWN:
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return GETCHAR_CURSOR_DOWN;
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case SCAN_DELETE:
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return GETCHAR_DELETE;
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case SCAN_END:
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return GETCHAR_END;
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case SCAN_HOME:
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return GETCHAR_HOME;
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case SCAN_PAGE_UP:
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return GETCHAR_PGUP;
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case SCAN_PAGE_DOWN:
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return GETCHAR_PGDOWN;
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case SCAN_ESC:
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return GETCHAR_ESCAPE;
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#endif
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}
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switch (ascii) {
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case '\r':
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return '\n';
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case '\b':
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return '\b';
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}
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if (shift_state & (GETCHAR_LCTRL | GETCHAR_RCTRL)) {
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switch (ascii) {
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case 'a': return GETCHAR_HOME;
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case 'e': return GETCHAR_END;
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case 'p': return GETCHAR_CURSOR_UP;
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case 'n': return GETCHAR_CURSOR_DOWN;
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case 'b': return GETCHAR_CURSOR_LEFT;
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case 'f': return GETCHAR_CURSOR_RIGHT;
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default: break;
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}
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}
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// Guard against non-printable values
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if (ascii < 0x20 || ascii > 0x7e) {
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return -1;
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}
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return ascii;
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}
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#if defined (BIOS)
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int _pit_sleep_and_quit_on_keypress(uint32_t ticks);
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static int input_sequence(void) {
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int val = 0;
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for (;;) {
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int ret = -1;
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size_t retries = 0;
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while (ret == -1 && retries < 1000000) {
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ret = serial_in();
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retries++;
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}
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if (ret == -1) {
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return 0;
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}
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switch (ret) {
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case 'A':
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return GETCHAR_CURSOR_UP;
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case 'B':
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return GETCHAR_CURSOR_DOWN;
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case 'C':
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return GETCHAR_CURSOR_RIGHT;
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case 'D':
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return GETCHAR_CURSOR_LEFT;
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case 'F':
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return GETCHAR_END;
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case 'H':
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return GETCHAR_HOME;
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}
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if (ret > '9' || ret < '0') {
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break;
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}
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val *= 10;
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val += ret - '0';
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}
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switch (val) {
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case 3:
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return GETCHAR_DELETE;
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case 5:
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return GETCHAR_PGUP;
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case 6:
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return GETCHAR_PGDOWN;
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case 21:
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return GETCHAR_F10;
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}
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return 0;
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}
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int pit_sleep_and_quit_on_keypress(int seconds) {
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if (!serial) {
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return _pit_sleep_and_quit_on_keypress(seconds * 18);
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}
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for (int i = 0; i < seconds * 18; i++) {
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int ret = _pit_sleep_and_quit_on_keypress(1);
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if (ret != 0) {
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return ret;
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}
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ret = serial_in();
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if (ret != -1) {
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again:
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switch (ret) {
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case '\r':
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return '\n';
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case 0x1b:
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delay(10000);
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ret = serial_in();
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if (ret == -1) {
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return GETCHAR_ESCAPE;
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}
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if (ret == '[') {
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return input_sequence();
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}
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goto again;
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case 0x7f:
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return '\b';
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}
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return ret;
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}
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}
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return 0;
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}
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#endif
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#if defined (UEFI)
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static int input_sequence(bool ext,
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EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *exproto,
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EFI_SIMPLE_TEXT_IN_PROTOCOL *sproto) {
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EFI_STATUS status;
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EFI_KEY_DATA kd;
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int val = 0;
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for (;;) {
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if (ext == false) {
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status = sproto->ReadKeyStroke(sproto, &kd.Key);
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} else {
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status = exproto->ReadKeyStrokeEx(exproto, &kd);
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}
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if (status != EFI_SUCCESS) {
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return 0;
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}
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switch (kd.Key.UnicodeChar) {
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case 'A':
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return GETCHAR_CURSOR_UP;
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case 'B':
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return GETCHAR_CURSOR_DOWN;
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case 'C':
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return GETCHAR_CURSOR_RIGHT;
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case 'D':
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return GETCHAR_CURSOR_LEFT;
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case 'F':
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return GETCHAR_END;
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case 'H':
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return GETCHAR_HOME;
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}
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if (kd.Key.UnicodeChar > '9' || kd.Key.UnicodeChar < '0') {
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break;
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}
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val *= 10;
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val += kd.Key.UnicodeChar - '0';
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}
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switch (val) {
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case 3:
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return GETCHAR_DELETE;
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case 5:
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return GETCHAR_PGUP;
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case 6:
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return GETCHAR_PGDOWN;
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case 21:
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return GETCHAR_F10;
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}
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return 0;
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}
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int pit_sleep_and_quit_on_keypress(int seconds) {
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EFI_KEY_DATA kd;
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UINTN which;
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EFI_EVENT events[2];
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EFI_GUID exproto_guid = EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID;
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EFI_GUID sproto_guid = EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID;
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EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *exproto = NULL;
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EFI_SIMPLE_TEXT_IN_PROTOCOL *sproto = NULL;
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bool use_sproto = false;
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if (gBS->HandleProtocol(gST->ConsoleInHandle, &exproto_guid, (void **)&exproto) != EFI_SUCCESS) {
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if (gBS->HandleProtocol(gST->ConsoleInHandle, &sproto_guid, (void **)&sproto) != EFI_SUCCESS) {
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if (gST->ConIn != NULL) {
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sproto = gST->ConIn;
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} else {
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panic(false, "Your input device doesn't have an input protocol!");
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}
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}
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events[0] = sproto->WaitForKey;
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use_sproto = true;
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} else {
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events[0] = exproto->WaitForKeyEx;
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}
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gBS->CreateEvent(EVT_TIMER, TPL_CALLBACK, NULL, NULL, &events[1]);
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gBS->SetTimer(events[1], TimerRelative, 10000000 * seconds);
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again:
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memset(&kd, 0, sizeof(EFI_KEY_DATA));
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gBS->WaitForEvent(2, events, &which);
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if (which == 1) {
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return 0;
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}
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EFI_STATUS status;
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if (use_sproto) {
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status = sproto->ReadKeyStroke(sproto, &kd.Key);
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} else {
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status = exproto->ReadKeyStrokeEx(exproto, &kd);
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}
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if (status != EFI_SUCCESS) {
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goto again;
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}
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if ((kd.KeyState.KeyShiftState & EFI_SHIFT_STATE_VALID) == 0) {
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kd.KeyState.KeyShiftState = 0;
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}
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if (kd.Key.ScanCode == 0x08) {
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return '\b';
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}
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if (kd.Key.ScanCode == SCAN_ESC) {
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gBS->CreateEvent(EVT_TIMER, TPL_CALLBACK, NULL, NULL, &events[1]);
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gBS->SetTimer(events[1], TimerRelative, 100000);
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gBS->WaitForEvent(2, events, &which);
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if (which == 1) {
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return GETCHAR_ESCAPE;
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}
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if (use_sproto) {
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status = sproto->ReadKeyStroke(sproto, &kd.Key);
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} else {
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status = exproto->ReadKeyStrokeEx(exproto, &kd);
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}
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if (status != EFI_SUCCESS) {
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goto again;
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}
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if (kd.Key.UnicodeChar == '[') {
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return input_sequence(!use_sproto, exproto, sproto);
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}
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}
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int ret = getchar_internal(kd.Key.ScanCode, kd.Key.UnicodeChar,
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kd.KeyState.KeyShiftState);
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if (ret == -1) {
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goto again;
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}
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return ret;
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}
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#endif
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static void reprint_string(int x, int y, const char *s) {
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size_t orig_x, orig_y;
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FOR_TERM(TERM->cursor_enabled = false);
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terms[0]->get_cursor_pos(terms[0], &orig_x, &orig_y);
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set_cursor_pos_helper(x, y);
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print("%s", s);
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set_cursor_pos_helper(orig_x, orig_y);
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FOR_TERM(TERM->cursor_enabled = true);
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}
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static void cursor_back(void) {
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size_t x, y;
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terms[0]->get_cursor_pos(terms[0], &x, &y);
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if (x) {
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x--;
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} else if (y) {
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y--;
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x = terms[0]->cols - 1;
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}
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set_cursor_pos_helper(x, y);
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}
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static void cursor_fwd(void) {
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size_t x, y;
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terms[0]->get_cursor_pos(terms[0], &x, &y);
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if (x < terms[0]->cols - 1) {
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x++;
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} else {
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x = 0;
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if (y < terms[0]->rows - 1) {
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y++;
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}
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}
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set_cursor_pos_helper(x, y);
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}
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void readline(const char *orig_str, char *buf, size_t limit) {
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bool prev_autoflush = terms[0]->autoflush;
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FOR_TERM(TERM->autoflush = false);
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size_t orig_str_len = strlen(orig_str);
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memmove(buf, orig_str, orig_str_len);
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buf[orig_str_len] = 0;
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size_t orig_x, orig_y;
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terms[0]->get_cursor_pos(terms[0], &orig_x, &orig_y);
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print("%s", orig_str);
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for (size_t i = orig_str_len; ; ) {
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FOR_TERM(TERM->double_buffer_flush(TERM));
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int c = getchar();
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switch (c) {
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case GETCHAR_CURSOR_LEFT:
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if (i) {
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i--;
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cursor_back();
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}
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continue;
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case GETCHAR_CURSOR_RIGHT:
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if (i < strlen(buf)) {
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i++;
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cursor_fwd();
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}
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continue;
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case '\b':
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if (i) {
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i--;
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cursor_back();
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case GETCHAR_DELETE:;
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size_t j;
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if (buf[i] == 0) {
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continue;
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}
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for (j = i; ; j++) {
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buf[j] = buf[j+1];
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if (!buf[j]) {
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buf[j] = ' ';
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break;
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}
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}
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reprint_string(orig_x, orig_y, buf);
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buf[j] = 0;
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}
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continue;
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case '\n':
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print("\n");
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goto out;
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case GETCHAR_END:
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for (size_t j = 0; j < strlen(buf) - i; j++) {
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cursor_fwd();
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}
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i = strlen(buf);
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continue;
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case GETCHAR_HOME:
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for (size_t j = 0; j < i; j++) {
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cursor_back();
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}
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i = 0;
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continue;
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default: {
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if (strlen(buf) < limit - 1 && isprint(c)) {
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for (size_t j = strlen(buf); ; j--) {
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buf[j+1] = buf[j];
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if (j == i)
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break;
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}
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buf[i] = c;
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i++;
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size_t prev_x, prev_y;
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terms[0]->get_cursor_pos(terms[0], &prev_x, &prev_y);
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cursor_fwd();
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reprint_string(orig_x, orig_y, buf);
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// If cursor has wrapped around, move the line start position up one row
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if (prev_x == terms[0]->cols - 1 && prev_y == terms[0]->rows - 1) {
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orig_y--;
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print("\n\e[J"); // Clear the bottom line
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}
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}
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}
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}
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}
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out:
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FOR_TERM(TERM->double_buffer_flush(TERM));
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FOR_TERM(TERM->autoflush = prev_autoflush);
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}
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