Small fixes about loging and libterm

1 files changed, 87 insertions, 27 deletions

diff --git a/libterm/term.c b/libterm/term.c
index 9a4e231..1aa7afa 100644
--- a/libterm/term.c
+++ b/libterm/term.c
@@ -26,26 +26,33 @@ enum KEY_ACTION{
 
 #define T_ESC "\x1b"
 
+//setup initial terminal stuff
+//this coulc act differently, becouse allways there is 
+//different terminal setting that should be default
 int term_init( term_screen *term )
 {
 	int ret=0;
 
-	if ( !isatty(STDIN_FILENO) ) goto exit_error;
+	memset( term, 0, sizeof( term_screen ));
+
+	if ( !isatty(STDIN_FILENO) )
+	{
+		ERROR("isatty failed\n")
+		goto exit_error;
+	}
 	//!!!!!!
 	//register atexit
 
 	term->ifd = STDIN_FILENO;
 	term->ofd = STDOUT_FILENO;
 
-	if (term_set_raw_mode( term ) == -1 ) goto exit_error;
+	//if you whant raw mode then you should set it man
+	if ( tcgetattr( term->ifd, &term->orig_i ) == -1 ) goto exit_error;
+	term->raw_i = term->orig_i;
 
-	term->term_col = term_get_maxcol( term );//not good
-	if (term->term_col == -1) ret = -1;
+	//if (term_set_raw_mode( term ) == -1 ) goto exit_error;
 
-	term->term_row = term_get_maxrow( term );//not good
-	if (term->term_row == -1) ret = -1;
-
-	term->mode = SCREEN_MODE_80x24;
+	term->mode = SCREEN_MODE_80x24; 
 
 	return ret;
 
@@ -54,7 +61,9 @@ exit_error:
 	return -1;
 }
 
-
+//get maximal number of columns setting up cursor to 999 column
+//and getting on with place terminal have placed cursor and getting
+//column on with terminal putted cursor
 int term_get_maxcol( term_screen *ts )
 {
 	int ret=-1;
@@ -87,7 +96,8 @@ exit_error:
 
 }
 
-
+//try to setup far away line after that read position where
+//terminal have putted cursor and read line of that postion
 int term_get_maxrow( term_screen *ts )
 {
 	int ret=-1;
@@ -123,6 +133,8 @@ exit_error:
 	return -1;
 }
 
+
+
 int term_cur_pos( term_screen *ts )
 {
 	int ret=-1;
@@ -182,16 +194,56 @@ exit_error:
 	return -1;
 }
 
-
-int term_cur_set_c( term_screen *ts )
+//set cursor column position
+int term_cur_set_c( term_screen *ts, unsigned int pc )
 {
+	int ret = 0;
+	int cur_r;
 
-}
+	/* go to right marging and get position */
+	if ( (cur_r = term_cur_pos_r( ts )) == -1 )
+		goto exit_error;
+	/* set position */
+	{
+		char buf[32];
+		int l;
+
+		snprintf( buf, 32, T_ESC "[%d;%dH", cur_r, pc);
+		l = strlen( buf );
+		if ( write( ts->ofd, buf, l ) != l)
+			goto exit_error;
+	}
+
+	return ret;
 
+exit_error:
+	return -1;
+}
 
-int term_cur_set_r( term_screen *ts )
+//set cursor row/line position
+int term_cur_set_r( term_screen *ts, unsigned int pr )
 {
+	int ret = 0;
+	int cur_c;
+
+	/* go to right marging and get position */
+	if ( (cur_c = term_cur_pos_c( ts )) == -1 )
+		goto exit_error;
+	/* set position */
+	{
+		char buf[32];
+		int l;
+
+		snprintf( buf, 32, T_ESC "[%d;%dH", pr, cur_c);
+		l = strlen( buf );
+		if ( write( ts->ofd, buf, l ) != l)
+			goto exit_error;
+	}
+
+	return ret;
 
+exit_error:
+	return -1;
 }
 
 int term_set_speed( term_screen *ts )
@@ -200,6 +252,8 @@ int term_set_speed( term_screen *ts )
 	return ret;
 }
 
+
+//clean terminal with escape command 
 int term_clr_scr( term_screen *ts )
 {
 	int ret = 0;
@@ -209,33 +263,39 @@ int term_clr_scr( term_screen *ts )
 	return ret;
 }
 
-
+//set terminal default input/output behavior
 int term_set_raw_mode( term_screen *ts )
 {
 	int ret = 0;
 
-	if ( tcgetattr( ts->ifd, &ts->orig ) == -1 ) goto exit_error;
-
+	if ( tcgetattr( ts->ifd, &ts->orig_i ) == -1 )
+	{
+		ERROR("Cannot get input terminal attributes\n");
+		goto exit_error;
+	}
 
-	ts->raw = ts->orig; /* modify the original mode */
+	ts->raw_i = ts->orig_i; /* modify the original mode */
 	/* input modes: no break, no CR to NL, no parity check, no strip char,
 	 * no start/stop output control. */
-	ts->raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+	ts->raw_i.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
 	/* output modes - disable post raw */
-	ts->raw.c_oflag &= ~(OPOST);
+	ts->raw_i.c_oflag &= ~(OPOST);
 	/* control modes - set 8 bit chars */
-	ts->raw.c_cflag |= (CS8);
+	ts->raw_i.c_cflag |= (CS8);
 	/* local modes - choing off, canonical off, no extended functions,
 	 * no signal chars (^Z,^C) */
-	ts->raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+	ts->raw_i.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
 	/* control chars - set return condition: min number of bytes and timer.
 	 * We want read to return every single byte, without timeout. */
-	ts->raw.c_cc[VMIN] = 1; 
-	ts->raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
+	ts->raw_i.c_cc[VMIN] = 1; 
+	ts->raw_i.c_cc[VTIME] = 0; /* 1 byte, no timer */
 
 	/* put terminal in raw mode after flushing */
-	if (tcsetattr( ts->ifd, TCSAFLUSH, &ts->raw) < 0) goto exit_error;
-
+	if (tcsetattr( ts->ifd, TCSAFLUSH, &ts->raw_i) < 0)
+	{
+		ERROR("Cannot set new terminal input attribures\n");
+		goto exit_error;
+	}
 
 	return ret;
 
@@ -249,5 +309,5 @@ exit_error:
 
 void term_set_orig_mode( term_screen *ts )
 {
-	tcsetattr( ts->ifd, TCSAFLUSH, &ts->orig );
+	tcsetattr( ts->ifd, TCSAFLUSH, &ts->orig_i );
 }
\ No newline at end of file