1136 - switch from ncurses to https://github.com/nsf/termbox

1 files changed, 302 insertions, 0 deletions

diff --git a/cpp/termbox/term.inl b/cpp/termbox/term.inl
new file mode 100644
index 00000000..80812b40
--- /dev/null
+++ b/cpp/termbox/term.inl
@@ -0,0 +1,302 @@
+enum {
+	T_ENTER_CA,
+	T_EXIT_CA,
+	T_SHOW_CURSOR,
+	T_HIDE_CURSOR,
+	T_CLEAR_SCREEN,
+	T_SGR0,
+	T_UNDERLINE,
+	T_BOLD,
+	T_BLINK,
+	T_REVERSE,
+	T_ENTER_KEYPAD,
+	T_EXIT_KEYPAD,
+	T_ENTER_MOUSE,
+	T_EXIT_MOUSE,
+	T_FUNCS_NUM,
+};
+
+#define EUNSUPPORTED_TERM -1
+
+// rxvt-256color
+static const char *rxvt_256color_keys[] = {
+	"\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0
+};
+static const char *rxvt_256color_funcs[] = {
+	"\0337\033[?47h", "\033[2J\033[?47l\0338", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033=", "\033>", "\033[?1000h", "\033[?1000l",
+};
+
+// Eterm
+static const char *eterm_keys[] = {
+	"\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0
+};
+static const char *eterm_funcs[] = {
+	"\0337\033[?47h", "\033[2J\033[?47l\0338", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "", "", "", "",
+};
+
+// screen
+static const char *screen_keys[] = {
+	"\033OP","\033OQ","\033OR","\033OS","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[1~","\033[4~","\033[5~","\033[6~","\033OA","\033OB","\033OD","\033OC", 0
+};
+static const char *screen_funcs[] = {
+	"\033[?1049h", "\033[?1049l", "\033[34h\033[?25h", "\033[?25l", "\033[H\033[J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033[?1h\033=", "\033[?1l\033>", "\033[?1000h", "\033[?1000l",
+};
+
+// rxvt-unicode
+static const char *rxvt_unicode_keys[] = {
+	"\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0
+};
+static const char *rxvt_unicode_funcs[] = {
+	"\033[?1049h", "\033[r\033[?1049l", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m\033(B", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033=", "\033>", "\033[?1000h", "\033[?1000l",
+};
+
+// linux
+static const char *linux_keys[] = {
+	"\033[[A","\033[[B","\033[[C","\033[[D","\033[[E","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[1~","\033[4~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0
+};
+static const char *linux_funcs[] = {
+	"", "", "\033[?25h\033[?0c", "\033[?25l\033[?1c", "\033[H\033[J", "\033[0;10m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "", "", "", "",
+};
+
+// xterm
+static const char *xterm_keys[] = {
+	"\033OP","\033OQ","\033OR","\033OS","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033OH","\033OF","\033[5~","\033[6~","\033OA","\033OB","\033OD","\033OC", 0
+};
+static const char *xterm_funcs[] = {
+	"\033[?1049h", "\033[?1049l", "\033[?12l\033[?25h", "\033[?25l", "\033[H\033[2J", "\033(B\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033[?1h\033=", "\033[?1l\033>", "\033[?1000h", "\033[?1000l",
+};
+
+static struct term {
+	const char *name;
+	const char **keys;
+	const char **funcs;
+} terms[] = {
+	{"rxvt-256color", rxvt_256color_keys, rxvt_256color_funcs},
+	{"Eterm", eterm_keys, eterm_funcs},
+	{"screen", screen_keys, screen_funcs},
+	{"rxvt-unicode", rxvt_unicode_keys, rxvt_unicode_funcs},
+	{"linux", linux_keys, linux_funcs},
+	{"xterm", xterm_keys, xterm_funcs},
+	{0, 0, 0},
+};
+
+static bool init_from_terminfo = false;
+static const char **keys;
+static const char **funcs;
+
+static int try_compatible(const char *term, const char *name,
+			  const char **tkeys, const char **tfuncs)
+{
+	if (strstr(term, name)) {
+		keys = tkeys;
+		funcs = tfuncs;
+		return 0;
+	}
+
+	return EUNSUPPORTED_TERM;
+}
+
+static int init_term_builtin(void)
+{
+	int i;
+	const char *term = getenv("TERM");
+
+	if (term) {
+		for (i = 0; terms[i].name; i++) {
+			if (!strcmp(terms[i].name, term)) {
+				keys = terms[i].keys;
+				funcs = terms[i].funcs;
+				return 0;
+			}
+		}
+
+		/* let's do some heuristic, maybe it's a compatible terminal */
+		if (try_compatible(term, "xterm", xterm_keys, xterm_funcs) == 0)
+			return 0;
+		if (try_compatible(term, "rxvt", rxvt_unicode_keys, rxvt_unicode_funcs) == 0)
+			return 0;
+		if (try_compatible(term, "linux", linux_keys, linux_funcs) == 0)
+			return 0;
+		if (try_compatible(term, "Eterm", eterm_keys, eterm_funcs) == 0)
+			return 0;
+		if (try_compatible(term, "screen", screen_keys, screen_funcs) == 0)
+			return 0;
+		/* let's assume that 'cygwin' is xterm compatible */
+		if (try_compatible(term, "cygwin", xterm_keys, xterm_funcs) == 0)
+			return 0;
+	}
+
+	return EUNSUPPORTED_TERM;
+}
+
+//----------------------------------------------------------------------
+// terminfo
+//----------------------------------------------------------------------
+
+static char *read_file(const char *file) {
+	FILE *f = fopen(file, "rb");
+	if (!f)
+		return 0;
+
+	struct stat st;
+	if (fstat(fileno(f), &st) != 0) {
+		fclose(f);
+		return 0;
+	}
+
+	char *data = malloc(st.st_size);
+	if (!data) {
+		fclose(f);
+		return 0;
+	}
+
+	if (fread(data, 1, st.st_size, f) != (size_t)st.st_size) {
+		fclose(f);
+		free(data);
+		return 0;
+	}
+
+	fclose(f);
+	return data;
+}
+
+static char *terminfo_try_path(const char *path, const char *term) {
+	char tmp[4096];
+	snprintf(tmp, sizeof(tmp), "%s/%c/%s", path, term[0], term);
+	tmp[sizeof(tmp)-1] = '\0';
+	char *data = read_file(tmp);
+	if (data) {
+		return data;
+	}
+
+	// fallback to darwin specific dirs structure
+	snprintf(tmp, sizeof(tmp), "%s/%x/%s", path, term[0], term);
+	tmp[sizeof(tmp)-1] = '\0';
+	return read_file(tmp);
+}
+
+static char *load_terminfo(void) {
+	char tmp[4096];
+	const char *term = getenv("TERM");
+	if (!term) {
+		return 0;
+	}
+
+	// if TERMINFO is set, no other directory should be searched
+	const char *terminfo = getenv("TERMINFO");
+	if (terminfo) {
+		return terminfo_try_path(terminfo, term);
+	}
+
+	// next, consider ~/.terminfo
+	const char *home = getenv("HOME");
+	if (home) {
+		snprintf(tmp, sizeof(tmp), "%s/.terminfo", home);
+		tmp[sizeof(tmp)-1] = '\0';
+		char *data = terminfo_try_path(tmp, term);
+		if (data)
+			return data;
+	}
+
+	// next, TERMINFO_DIRS
+	const char *dirs = getenv("TERMINFO_DIRS");
+	if (dirs) {
+		snprintf(tmp, sizeof(tmp), "%s", dirs);
+		tmp[sizeof(tmp)-1] = '\0';
+		char *dir = strtok(tmp, ":");
+		while (dir) {
+			const char *cdir = dir;
+			if (strcmp(cdir, "") == 0) {
+				cdir = "/usr/share/terminfo";
+			}
+			char *data = terminfo_try_path(cdir, term);
+			if (data)
+				return data;
+			dir = strtok(0, ":");
+		}
+	}
+
+	// fallback to /usr/share/terminfo
+	return terminfo_try_path("/usr/share/terminfo", term);
+}
+
+#define TI_MAGIC 0432
+#define TI_HEADER_LENGTH 12
+#define TB_KEYS_NUM 22
+
+static const char *terminfo_copy_string(char *data, int str, int table) {
+	const int16_t off = *(int16_t*)(data + str);
+	const char *src = data + table + off;
+	int len = strlen(src);
+	char *dst = malloc(len+1);
+	strcpy(dst, src);
+	return dst;
+}
+
+static const int16_t ti_funcs[] = {
+	28, 40, 16, 13, 5, 39, 36, 27, 26, 34, 89, 88,
+};
+
+static const int16_t ti_keys[] = {
+	66, 68 /* apparently not a typo; 67 is F10 for whatever reason */, 69,
+	70, 71, 72, 73, 74, 75, 67, 216, 217, 77, 59, 76, 164, 82, 81, 87, 61,
+	79, 83,
+};
+
+static int init_term(void) {
+	int i;
+	char *data = load_terminfo();
+	if (!data) {
+		init_from_terminfo = false;
+		return init_term_builtin();
+	}
+
+	int16_t *header = (int16_t*)data;
+	if ((header[1] + header[2]) % 2) {
+		// old quirk to align everything on word boundaries
+		header[2] += 1;
+	}
+
+	const int str_offset = TI_HEADER_LENGTH +
+		header[1] + header[2] +	2 * header[3];
+	const int table_offset = str_offset + 2 * header[4];
+
+	keys = malloc(sizeof(const char*) * (TB_KEYS_NUM+1));
+	for (i = 0; i < TB_KEYS_NUM; i++) {
+		keys[i] = terminfo_copy_string(data,
+			str_offset + 2 * ti_keys[i], table_offset);
+	}
+	keys[TB_KEYS_NUM] = 0;
+
+	funcs = malloc(sizeof(const char*) * T_FUNCS_NUM);
+	// the last two entries are reserved for mouse. because the table offset is
+	// not there, the two entries have to fill in manually
+	for (i = 0; i < T_FUNCS_NUM-2; i++) {
+		funcs[i] = terminfo_copy_string(data,
+			str_offset + 2 * ti_funcs[i], table_offset);
+	}
+
+	funcs[T_FUNCS_NUM-2] = "\033[?1000h";
+	funcs[T_FUNCS_NUM-1] = "\033[?1000l";
+
+	init_from_terminfo = true;
+	free(data);
+	return 0;
+}
+
+static void shutdown_term(void) {
+	if (init_from_terminfo) {
+		int i;
+		for (i = 0; i < TB_KEYS_NUM; i++) {
+			free((void*)keys[i]);
+		}
+		// the last two entries are reserved for mouse. because the table offset
+		// is not there, the two entries have to fill in manually and do not
+		// need to be freed.
+		for (i = 0; i < T_FUNCS_NUM-2; i++) {
+			free((void*)funcs[i]);
+		}
+		free(keys);
+		free(funcs);
+	}
+}