commit 5d9e0d1bc57d24826ae87b45abbca59e4f760c72
parent 2b48f436ef0032ef2d395208be5a64fa97bbd5b8
Author: Sophie <info@soophie.de>
Date: Tue, 13 May 2025 13:03:00 +0000
feat: Abstracted teleterm to backend API (POSIX, WINDOWS)
Diffstat:
| M | src/libterm.h | | | 574 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------- |
1 file changed, 412 insertions(+), 162 deletions(-)
diff --git a/src/libterm.h b/src/libterm.h
@@ -3,7 +3,6 @@
#include <stddef.h>
#include <stdbool.h>
-#include <termios.h>
typedef enum {
TERM_CODE_RAWMODE_ENABLE,
@@ -29,25 +28,23 @@ typedef enum {
KEY_END,
KEY_PAGE_UP,
KEY_PAGE_DOWN,
-} term_keycode_t;
+} term_key_t;
+
+typedef struct term term_t;
-typedef void (*term_dispatch_fn_t)(int fd, term_code_t code, void *data, size_t len);
-typedef void *(*term_fetch_fn_t)(int fd, term_code_t code, void *data, size_t len, size_t ret_len);
+typedef void (*term_dispatch_fn_t)(term_t *self, term_code_t code, void *data, size_t len);
+typedef void *(*term_fetch_fn_t)(term_t *self, term_code_t code, void *data, size_t len, size_t ret_len);
-typedef struct {
- struct termios termios;
+struct term {
char *buffer;
size_t len;
- bool teleterm_mode;
term_dispatch_fn_t dispatch;
term_fetch_fn_t fetch;
int fd;
-} term_t;
+};
term_t term_init(void);
void term_cleanup(term_t *self);
-void term_fd_set(term_t *self, int fd);
-void term_teleterm_enable(term_t *self, term_dispatch_fn_t dispatch, term_fetch_fn_t fetch);
void term_rawmode_enable(term_t *self);
void term_rawmode_disable(term_t *self);
void term_write(term_t *self, char *str);
@@ -64,10 +61,8 @@ int term_poll_key(term_t *self, int timeout_ms);
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <sys/ioctl.h>
#include <errno.h>
#include <stdarg.h>
-#include <poll.h>
void _term_panic(term_t *self, const char *str) {
write(self->fd, "\x1b[2J", 4);
@@ -77,46 +72,19 @@ void _term_panic(term_t *self, const char *str) {
exit(EXIT_FAILURE);
}
-term_t term_init(void) {
- return (term_t) {
- .buffer = NULL,
- .len = 0,
- .teleterm_mode = false,
- .dispatch = NULL,
- .fetch = NULL,
- .fd = STDOUT_FILENO,
- };
-}
+#ifdef LIB_TERM_POSIX
-void term_cleanup(term_t *self) {
- if (self) {
- if (self->buffer) {
- free(self->buffer);
- self->buffer = NULL;
- self->len = 0;
- }
- }
-}
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <poll.h>
-void term_fd_set(term_t *self, int fd) {
- self->fd = fd;
-}
+static struct termios _posix_termios;
-void term_teleterm_enable(term_t *self, term_dispatch_fn_t dispatch, term_fetch_fn_t fetch) {
- self->teleterm_mode = true;
- self->dispatch = dispatch;
- self->fetch = fetch;
-}
-
-void term_rawmode_enable(term_t *self) {
- if (self->teleterm_mode) {
- self->dispatch(self->fd, TERM_CODE_RAWMODE_ENABLE, NULL, 0);
- return;
- }
- if (tcgetattr(STDIN_FILENO, &self->termios) == -1) {
+static void posix_rawmode_enable(term_t *self) {
+ if (tcgetattr(STDIN_FILENO, &_posix_termios) == -1) {
_term_panic(self, "tcgetattr");
}
- struct termios raw = self->termios;
+ struct termios raw = _posix_termios;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_oflag &= ~(OPOST);
raw.c_cflag |= (CS8);
@@ -128,71 +96,36 @@ void term_rawmode_enable(term_t *self) {
}
}
-void term_rawmode_disable(term_t *self) {
- if (self->teleterm_mode) {
- self->dispatch(self->fd, TERM_CODE_RAWMODE_DISABLE, NULL, 0);
- return;
- }
- if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &self->termios) == -1) {
+static void posix_rawmode_disable(term_t *self) {
+ if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &_posix_termios) == -1) {
_term_panic(self, "tcsetattr");
}
}
-void term_write(term_t *self, char *str) {
- if (self->teleterm_mode) {
- self->dispatch(self->fd, TERM_CODE_WRITE, NULL, 0);
- }
- size_t str_len = strlen(str);
- char *new_buffer = (char *) realloc(self->buffer, sizeof(char) * (self->len + str_len + 1));
- if (new_buffer == NULL) {
- fprintf(stderr, "Cannot realloc memory!\n");
- return;
- }
- self->buffer = new_buffer;
- memcpy(self->buffer + self->len, str, str_len);
- self->len += str_len;
- self->buffer[self->len] = '\0';
-}
-
-void term_writef(term_t *self, const char *format, ...) {
- va_list args;
- va_start(args, format);
- char str[1000];
- vsnprintf(str, sizeof(str), format, args);
- term_write(self, str);
- va_end(args);
+static void posix_write(term_t *self, void *data, size_t len) {
+ (void) self;
+ (void) data;
+ (void) len;
}
-void term_flush(term_t *self) {
+static void posix_flush(term_t *self, void *data, size_t len) {
+ (void) data;
+ (void) len;
if (self->len > 0) {
- if (self->teleterm_mode) {
- self->dispatch(self->fd, TERM_CODE_FLUSH, self->buffer, self->len);
- }
- else {
- write(self->fd, self->buffer, self->len);
- }
+ write(self->fd, self->buffer, self->len);
free(self->buffer);
self->buffer = NULL;
self->len = 0;
}
}
-int term_read_cursor(term_t *self, size_t *rows, size_t *cols) {
- if (self->teleterm_mode) {
- void *data = self->fetch(self->fd, TERM_CODE_CURSOR_READ, NULL, 0, 2 * sizeof(size_t));
- if (data) {
- size_t *tuple = (size_t *) data;
- *rows = tuple[0];
- *cols = tuple[1];
- free(data);
- return 0;
- }
- return -1;
- }
+static void *posix_read_cursor(term_t *self, void *data, size_t len) {
+ (void) data;
+ (void) len;
char buf[32];
unsigned int i = 0;
if (write(self->fd, "\x1b[6n", 4) != 4) {
- return -1;
+ return NULL;
}
while (i < sizeof(buf) - 1) {
if (read(STDIN_FILENO, &buf[i], 1) != 1) {
@@ -205,53 +138,36 @@ int term_read_cursor(term_t *self, size_t *rows, size_t *cols) {
}
buf[i] = '\0';
if (buf[0] != '\x1b' || buf[1] != '[') {
- return -1;
+ return NULL;
}
- if (sscanf(&buf[2], "%zu;%zu", rows, cols) != 2) {
- return -1;
+ size_t *tuple = malloc(2 * sizeof(size_t));
+ if (sscanf(&buf[2], "%zu;%zu", &tuple[0], &tuple[1]) != 2) {
+ free(tuple);
+ return NULL;
}
- return 0;
+ return tuple;
}
-int term_read_window(term_t *self, size_t *rows, size_t *cols) {
- if (self->teleterm_mode) {
- void *data = self->fetch(self->fd, TERM_CODE_WINDOW_READ, NULL, 0, 2 * sizeof(size_t));
- if (data) {
- size_t *tuple = (size_t *) data;
- *rows = tuple[0];
- *cols = tuple[1];
- free(data);
- return 0;
- }
- return -1;
- }
+static void *posix_read_window(term_t *self, void *data, size_t len) {
struct winsize ws;
if (ioctl(self->fd, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
- if (write(self->fd, "\x1b[999C\x1b[999B", 12) != 12) {
- return -1;
+ if (write(self->fd, "\x1b[999C\x1b[999B", 12) == 12) {
+ return posix_read_cursor(self, data, len);
}
- return term_read_cursor(self, rows, cols);
}
else {
- *cols = ws.ws_col;
- *rows = ws.ws_row;
- return 0;
+ size_t *tuple = malloc(2 * sizeof(size_t));
+ tuple[0] = ws.ws_row;
+ tuple[1] = ws.ws_col;
+ return tuple;
}
+ return NULL;
}
-int term_read_key(term_t *self) {
- if (self->teleterm_mode) {
- void *data = self->fetch(self->fd, TERM_CODE_KEY_READ, NULL, 0, sizeof(int));
- if (data) {
- int *single = (int *) data;
- int key = *single;
- free(data);
- return key;
- }
- return -1;
- }
+static void *posix_read_key(term_t *self) {
int len;
char c;
+ int key;
while ((len = read(STDIN_FILENO, &c, 1)) != 1) {
if (len == -1 && errno != EAGAIN) {
_term_panic(self, "read");
@@ -260,83 +176,417 @@ int term_read_key(term_t *self) {
if (c == '\x1b') {
char seq[3];
if (read(STDIN_FILENO, &seq[0], 1) != 1) {
- return '\x1b';
+ key = '\x1b';
}
if (read(STDIN_FILENO, &seq[1], 1) != 1) {
- return '\x1b';
+ key = '\x1b';
}
if (seq[0] == '[') {
if (seq[1] >= '0' && seq[1] <= '9') {
if (read(STDIN_FILENO, &seq[2], 1) != 1) {
- return '\x1b';
+ key = '\x1b';
}
if (seq[2] == '~') {
switch (seq[1]) {
case '1':
- return KEY_HOME;
+ key = KEY_HOME;
+ break;
case '3':
- return KEY_DEL;
+ key = KEY_DEL;
+ break;
case '4':
- return KEY_END;
+ key = KEY_END;
+ break;
case '5':
- return KEY_PAGE_UP;
+ key = KEY_PAGE_UP;
+ break;
case '6':
- return KEY_PAGE_DOWN;
+ key = KEY_PAGE_DOWN;
+ break;
case '7':
- return KEY_HOME;
+ key = KEY_HOME;
+ break;
case '8':
- return KEY_END;
+ key = KEY_END;
+ break;
+ default:
+ break;
}
}
}
else {
switch (seq[1]) {
case 'A':
- return KEY_ARROW_UP;
+ key = KEY_ARROW_UP;
+ break;
case 'B':
- return KEY_ARROW_DOWN;
+ key = KEY_ARROW_DOWN;
+ break;
case 'C':
- return KEY_ARROW_RIGHT;
+ key = KEY_ARROW_RIGHT;
+ break;
case 'D':
- return KEY_ARROW_LEFT;
+ key = KEY_ARROW_LEFT;
+ break;
case 'H':
- return KEY_HOME;
+ key = KEY_HOME;
+ break;
case 'F':
- return KEY_END;
+ key = KEY_END;
+ break;
+ default:
+ key = '\x1b';
+ break;
}
- return '\x1b';
}
}
else if (seq[0] == 'O') {
switch (seq[1]) {
case 'H':
- return KEY_HOME;
+ key = KEY_HOME;
+ break;
case 'F':
- return KEY_END;
+ key = KEY_END;
+ break;
+ default:
+ break;
}
}
}
- return c;
+ else {
+ key = c;
+ }
+ int *ret = malloc(sizeof(int));
+ *ret = key;
+ return ret;
}
-int term_poll_key(term_t *self, int timeout_ms) {
- if (self->teleterm_mode) {
- void *data = self->fetch(self->fd, TERM_CODE_KEY_POLL, &timeout_ms, sizeof(timeout_ms), sizeof(int));
- if (data) {
- int *single = (int *) data;
- int key = *single;
- free(data);
- return key;
- }
- return -1;
- }
+static void *posix_poll_key(term_t *self, void *data, size_t len) {
+ (void) len;
struct pollfd fds[1];
fds[0].fd = STDIN_FILENO;
fds[0].events = POLLIN | POLLPRI;
+ int timeout_ms = *(int *) data;
if (poll(fds, 1, timeout_ms)) {
- return term_read_key(self);
+ return posix_read_key(self);
+ }
+ int *ret = malloc(sizeof(int));
+ *ret = 0;
+ return ret;
+}
+
+static void posix_dispatch(term_t *self, term_code_t code, void *data, size_t len) {
+ switch (code) {
+ case TERM_CODE_RAWMODE_ENABLE:
+ posix_rawmode_enable(self);
+ break;
+ case TERM_CODE_RAWMODE_DISABLE:
+ posix_rawmode_disable(self);
+ break;
+ case TERM_CODE_WRITE:
+ posix_write(self, data, len);
+ break;
+ case TERM_CODE_FLUSH:
+ posix_flush(self, data, len);
+ break;
+ default:
+ break;
+ }
+}
+
+static void *posix_fetch(term_t *self, term_code_t code, void *data, size_t len, size_t ret_len) {
+ (void) ret_len;
+ switch (code) {
+ case TERM_CODE_CURSOR_READ:
+ return posix_read_cursor(self, data, len);
+ case TERM_CODE_WINDOW_READ:
+ return posix_read_window(self, data, len);
+ case TERM_CODE_KEY_READ:
+ return posix_read_key(self);
+ case TERM_CODE_KEY_POLL:
+ return posix_poll_key(self, data, len);
+ default:
+ return NULL;
+ }
+}
+
+#endif // LIB_TERM_POSIX
+
+#ifdef LIB_TERM_WINDOWS
+
+#include <windows.h>
+#include <conio.h>
+
+static DWORD _windows_console_mode;
+
+static void windows_rawmode_enable(term_t *self) {
+ HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
+ DWORD mode;
+ if (!GetConsoleMode(handle, &mode)) {
+ _term_panic(self, "GetConsoleMode");
+ }
+ _windows_console_mode = mode;
+ mode &= ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
+ if (!SetConsoleMode(handle, mode)) {
+ _term_panic(self, "SetConsoleMode");
+ }
+}
+
+static void windows_rawmode_disable(term_t *self) {
+ HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
+ if (!SetConsoleMode(handle, _windows_console_mode)) {
+ _term_panic(self, "SetConsoleMode");
+ }
+}
+
+static void windows_write(term_t *self, void *data, size_t len) {
+ DWORD written;
+ WriteConsole(GetStdHandle(self->fd), data, (DWORD) len, &written, NULL);
+}
+
+static void windows_flush(term_t *self, void *data, size_t len) {
+ (void) data;
+ (void) len;
+ if (self->len > 0) {
+ DWORD written;
+ WriteConsole(GetStdHandle(self->fd), self->buffer, (DWORD) self->len, &written, NULL);
+ free(self->buffer);
+ self->buffer = NULL;
+ self->len = 0;
+ }
+}
+
+static void *windows_read_cursor(term_t *self, void *data, size_t len) {
+ (void) data;
+ (void) len;
+ CONSOLE_SCREEN_BUFFER_INFO console_info;
+ if (!GetConsoleScreenBufferInfo(GetStdHandle(self->fd), &console_info)) {
+ return NULL;
+ }
+ size_t *tuple = malloc(2 * sizeof(size_t));
+ tuple[0] = console_info.dwCursorPosition.Y + 1;
+ tuple[1] = console_info.dwCursorPosition.X + 1;
+ return tuple;
+}
+
+static void *windows_read_window(term_t *self, void *data, size_t len) {
+ (void) data;
+ (void) len;
+ CONSOLE_SCREEN_BUFFER_INFO console_info;
+ if (!GetConsoleScreenBufferInfo(GetStdHandle(self->fd), &console_info)) {
+ return NULL;
+ }
+ size_t *tuple = malloc(2 * sizeof(size_t));
+ tuple[0] = console_info.srWindow.Bottom - console_info.srWindow.Top + 1;
+ tuple[1] = console_info.srWindow.Right - console_info.srWindow.Left + 1;
+ return tuple;
+}
+
+static void *windows_read_key(term_t *self) {
+ (void) self;
+ int c = _getch();
+ if (c == 0 || c == 224) {
+ int ext = _getch();
+ switch (ext) {
+ case 72:
+ c = KEY_ARROW_UP;
+ break;
+ case 80:
+ c = KEY_ARROW_DOWN;
+ break;
+ case 75:
+ c = KEY_ARROW_LEFT;
+ break;
+ case 77:
+ c = KEY_ARROW_RIGHT;
+ break;
+ case 71:
+ c = KEY_HOME;
+ break;
+ case 79:
+ c = KEY_END;
+ break;
+ case 73:
+ c = KEY_PAGE_UP;
+ break;
+ case 81:
+ c = KEY_PAGE_DOWN;
+ break;
+ case 83:
+ c = KEY_DEL;
+ break;
+ default:
+ c = 0;
+ break;
+ }
+ }
+ int *ret = malloc(sizeof(int));
+ *ret = c;
+ return ret;
+}
+
+static void *windows_poll_key(term_t *self, void *data, size_t len) {
+ (void) len;
+ int timeout_ms = *(int *) data;
+ DWORD start = GetTickCount();
+ while (GetTickCount() - start < (DWORD) timeout_ms) {
+ if (_kbhit()) {
+ return windows_read_key(self);
+ }
+ Sleep(1);
+ }
+ int *ret = malloc(sizeof(int));
+ *ret = 0;
+ return ret;
+}
+
+static void windows_dispatch(term_t *self, term_code_t code, void *data, size_t len) {
+ switch (code) {
+ case TERM_CODE_RAWMODE_ENABLE:
+ windows_rawmode_enable(self);
+ break;
+ case TERM_CODE_RAWMODE_DISABLE:
+ windows_rawmode_disable(self);
+ break;
+ case TERM_CODE_WRITE:
+ windows_write(self, data, len);
+ break;
+ case TERM_CODE_FLUSH:
+ windows_flush(self, data, len);
+ break;
+ default:
+ break;
+ }
+}
+
+static void *windows_fetch(term_t *self, term_code_t code, void *data, size_t len, size_t ret_len) {
+ (void) ret_len;
+ switch (code) {
+ case TERM_CODE_CURSOR_READ:
+ return windows_read_cursor(self, data, len);
+ case TERM_CODE_WINDOW_READ:
+ return windows_read_window(self, data, len);
+ case TERM_CODE_KEY_READ:
+ return windows_read_key(self);
+ case TERM_CODE_KEY_POLL:
+ return windows_poll_key(self, data, len);
+ default:
+ return NULL;
+ }
+}
+
+#endif // LIB_TERM_WINDOWS
+
+term_t term_init(void) {
+ term_t self = {
+ .buffer = NULL,
+ .len = 0,
+ .dispatch = NULL,
+ .fetch = NULL,
+ .fd = 0,
+ };
+ #ifdef LIB_TERM_POSIX
+ self.dispatch = posix_dispatch;
+ self.fetch = posix_fetch;
+ self.fd = STDOUT_FILENO;
+ #endif /* LIB_TERM_POSIX */
+ #ifdef LIB_TERM_WINDOWS
+ self.dispatch = windows_dispatch;
+ self.fetch = windows_fetch;
+ self.fd = STD_OUTPUT_HANDLE;
+ #endif /* LIB_TERM_WINDOWS */
+ return self;
+}
+
+void term_cleanup(term_t *self) {
+ if (self) {
+ if (self->buffer) {
+ free(self->buffer);
+ self->buffer = NULL;
+ self->len = 0;
+ }
+ }
+}
+
+void term_rawmode_enable(term_t *self) {
+ self->dispatch(self, TERM_CODE_RAWMODE_ENABLE, NULL, 0);
+}
+
+void term_rawmode_disable(term_t *self) {
+ self->dispatch(self, TERM_CODE_RAWMODE_DISABLE, NULL, 0);
+}
+
+void term_write(term_t *self, char *str) {
+ self->dispatch(self, TERM_CODE_WRITE, NULL, 0);
+ size_t str_len = strlen(str);
+ char *new_buffer = (char *) realloc(self->buffer, sizeof(char) * (self->len + str_len + 1));
+ if (new_buffer == NULL) {
+ fprintf(stderr, "Cannot realloc memory!\n");
+ return;
+ }
+ self->buffer = new_buffer;
+ memcpy(self->buffer + self->len, str, str_len);
+ self->len += str_len;
+ self->buffer[self->len] = '\0';
+}
+
+void term_writef(term_t *self, const char *format, ...) {
+ va_list args;
+ va_start(args, format);
+ char str[1000];
+ vsnprintf(str, sizeof(str), format, args);
+ term_write(self, str);
+ va_end(args);
+}
+
+void term_flush(term_t *self) {
+ self->dispatch(self, TERM_CODE_FLUSH, NULL, 0);
+}
+
+int term_read_cursor(term_t *self, size_t *rows, size_t *cols) {
+ void *data = self->fetch(self, TERM_CODE_CURSOR_READ, NULL, 0, 2 * sizeof(size_t));
+ if (data) {
+ size_t *tuple = (size_t *) data;
+ *rows = tuple[0];
+ *cols = tuple[1];
+ free(data);
+ return 0;
+ }
+ return -1;
+}
+
+int term_read_window(term_t *self, size_t *rows, size_t *cols) {
+ void *data = self->fetch(self, TERM_CODE_WINDOW_READ, NULL, 0, 2 * sizeof(size_t));
+ if (data) {
+ size_t *tuple = (size_t *) data;
+ *rows = tuple[0];
+ *cols = tuple[1];
+ free(data);
+ return 0;
+ }
+ return -1;
+}
+
+int term_read_key(term_t *self) {
+ void *data = self->fetch(self, TERM_CODE_KEY_READ, NULL, 0, sizeof(int));
+ if (data) {
+ int *single = (int *) data;
+ int key = *single;
+ free(data);
+ return key;
+ }
+ return -1;
+}
+
+int term_poll_key(term_t *self, int timeout_ms) {
+ void *data = self->fetch(self, TERM_CODE_KEY_POLL, &timeout_ms, sizeof(timeout_ms), sizeof(int));
+ if (data) {
+ int *single = (int *) data;
+ int key = *single;
+ free(data);
+ return key;
}
- return 0;
+ return -1;
}
#endif // LIB_TERM_IMPL