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-rw-r--r--modules/stdio/stdio.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/modules/stdio/stdio.c b/modules/stdio/stdio.c
new file mode 100644
index 0000000..bfdc9e7
--- /dev/null
+++ b/modules/stdio/stdio.c
@@ -0,0 +1,182 @@
+/**
+ * @file stdio.c Standard Input/Output UI module
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <re.h>
+#include <baresip.h>
+
+
+/** Local constants */
+enum {
+ RELEASE_VAL = 250 /**< Key release value in [ms] */
+};
+
+struct ui_st {
+ struct ui *ui; /* base class */
+ struct tmr tmr;
+ struct termios term;
+ bool term_set;
+ ui_input_h *h;
+ void *arg;
+};
+
+
+/* We only allow one instance */
+static struct ui_st *_ui;
+static struct ui *stdio;
+
+
+static void ui_destructor(void *arg)
+{
+ struct ui_st *st = arg;
+
+ fd_close(STDIN_FILENO);
+
+ if (st->term_set)
+ tcsetattr(STDIN_FILENO, TCSANOW, &st->term);
+
+ tmr_cancel(&st->tmr);
+ mem_deref(st->ui);
+
+ _ui = NULL;
+}
+
+
+static int print_handler(const char *p, size_t size, void *arg)
+{
+ (void)arg;
+
+ return 1 == fwrite(p, size, 1, stderr) ? 0 : ENOMEM;
+}
+
+
+static void report_key(struct ui_st *ui, char key)
+{
+ struct re_printf pf;
+
+ pf.vph = print_handler;
+
+ if (ui->h)
+ ui->h(key, &pf, ui->arg);
+}
+
+
+static void timeout(void *arg)
+{
+ struct ui_st *st = arg;
+
+ /* Emulate key-release */
+ report_key(st, 0x00);
+}
+
+
+static void ui_fd_handler(int flags, void *arg)
+{
+ struct ui_st *st = arg;
+ char key;
+ (void)flags;
+
+ if (1 != read(STDIN_FILENO, &key, 1)) {
+ return;
+ }
+
+ tmr_start(&st->tmr, RELEASE_VAL, timeout, st);
+ report_key(st, key);
+}
+
+
+static int term_setup(struct ui_st *st)
+{
+ struct termios now;
+
+ if (tcgetattr(STDIN_FILENO, &st->term) < 0)
+ return errno;
+
+ now = st->term;
+
+ now.c_lflag |= ISIG;
+ now.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
+
+ /* required on Solaris */
+ now.c_cc[VMIN] = 1;
+ now.c_cc[VTIME] = 0;
+
+ if (tcsetattr(STDIN_FILENO, TCSANOW, &now) < 0)
+ return errno;
+
+ st->term_set = true;
+
+ return 0;
+}
+
+
+static int ui_alloc(struct ui_st **stp, struct ui_prm *prm,
+ ui_input_h *ih, void *arg)
+{
+ struct ui_st *st;
+ int err;
+
+ (void)prm;
+
+ if (!stp)
+ return EINVAL;
+
+ if (_ui) {
+ *stp = mem_ref(_ui);
+ return 0;
+ }
+
+ st = mem_zalloc(sizeof(*st), ui_destructor);
+ if (!st)
+ return ENOMEM;
+
+ st->ui = mem_ref(stdio);
+ tmr_init(&st->tmr);
+
+ err = fd_listen(STDIN_FILENO, FD_READ, ui_fd_handler, st);
+ if (err)
+ goto out;
+
+ err = term_setup(st);
+ if (err) {
+ info("stdio: could not setup terminal: %m\n", err);
+ err = 0;
+ }
+
+ st->h = ih;
+ st->arg = arg;
+
+ out:
+ if (err)
+ mem_deref(st);
+ else
+ *stp = _ui = st;
+
+ return err;
+}
+
+
+static int module_init(void)
+{
+ return ui_register(&stdio, "stdio", ui_alloc, NULL);
+}
+
+
+static int module_close(void)
+{
+ stdio = mem_deref(stdio);
+ return 0;
+}
+
+
+const struct mod_export DECL_EXPORTS(stdio) = {
+ "stdio",
+ "ui",
+ module_init,
+ module_close
+};