321 lines
10 KiB
C++
321 lines
10 KiB
C++
enum {
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T_ENTER_CA,
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T_EXIT_CA,
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T_SHOW_CURSOR,
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T_HIDE_CURSOR,
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T_CLEAR_SCREEN,
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T_SGR0,
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T_UNDERLINE,
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T_BOLD,
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T_BLINK,
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T_REVERSE,
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T_ENTER_KEYPAD,
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T_EXIT_KEYPAD,
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T_ENTER_MOUSE,
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T_EXIT_MOUSE,
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T_ENTER_BRACKETED_PASTE,
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T_EXIT_BRACKETED_PASTE,
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T_FUNCS_NUM,
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};
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#define EUNSUPPORTED_TERM -1
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// rxvt-256color
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static const char *rxvt_256color_keys[] = {
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"\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
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};
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static const char *rxvt_256color_funcs[] = {
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"\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", "\033[?2004h", "\033[?2004l",
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};
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// Eterm
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static const char *eterm_keys[] = {
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"\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
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};
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static const char *eterm_funcs[] = {
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"\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", "", "", "", "", "", "",
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};
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// screen
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static const char *screen_keys[] = {
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"\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
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};
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static const char *screen_funcs[] = {
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"\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", "\033[?2004h", "\033[?2004l",
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};
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// rxvt-unicode
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static const char *rxvt_unicode_keys[] = {
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"\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
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};
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static const char *rxvt_unicode_funcs[] = {
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"\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", "\033[?2004h", "\033[?2004l",
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};
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// linux
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static const char *linux_keys[] = {
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"\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
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};
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static const char *linux_funcs[] = {
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"", "", "\033[?25h\033[?0c", "\033[?25l\033[?1c", "\033[H\033[J", "\033[0;10m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "", "", "", "", "", "",
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};
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// xterm
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static const char *xterm_keys[] = {
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"\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
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};
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static const char *xterm_funcs[] = {
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"\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", "\033[?2004h", "\033[?2004l",
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};
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static struct term {
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const char *name;
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const char **keys;
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const char **funcs;
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} terms[] = {
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{"rxvt-256color", rxvt_256color_keys, rxvt_256color_funcs},
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{"Eterm", eterm_keys, eterm_funcs},
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{"screen", screen_keys, screen_funcs},
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{"rxvt-unicode", rxvt_unicode_keys, rxvt_unicode_funcs},
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{"linux", linux_keys, linux_funcs},
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{"xterm", xterm_keys, xterm_funcs},
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{0, 0, 0},
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};
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static bool init_from_terminfo = false;
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static const char **keys;
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static const char **funcs;
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static int try_compatible(const char *term, const char *name,
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const char **tkeys, const char **tfuncs)
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{
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if (strstr(term, name)) {
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keys = tkeys;
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funcs = tfuncs;
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return 0;
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}
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return EUNSUPPORTED_TERM;
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}
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static int init_term_builtin(void)
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{
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int i;
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const char *term = getenv("TERM");
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if (term) {
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for (i = 0; terms[i].name; i++) {
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if (!strcmp(terms[i].name, term)) {
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keys = terms[i].keys;
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funcs = terms[i].funcs;
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return 0;
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}
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}
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/* let's do some heuristic, maybe it's a compatible terminal */
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if (try_compatible(term, "xterm", xterm_keys, xterm_funcs) == 0)
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return 0;
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if (try_compatible(term, "rxvt", rxvt_unicode_keys, rxvt_unicode_funcs) == 0)
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return 0;
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if (try_compatible(term, "linux", linux_keys, linux_funcs) == 0)
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return 0;
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if (try_compatible(term, "Eterm", eterm_keys, eterm_funcs) == 0)
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return 0;
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if (try_compatible(term, "screen", screen_keys, screen_funcs) == 0)
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return 0;
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/* let's assume that 'cygwin' is xterm compatible */
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if (try_compatible(term, "cygwin", xterm_keys, xterm_funcs) == 0)
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return 0;
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}
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return EUNSUPPORTED_TERM;
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}
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//----------------------------------------------------------------------
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// terminfo
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//----------------------------------------------------------------------
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static char *read_file(const char *file) {
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FILE *f = fopen(file, "rb");
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if (!f)
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return 0;
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struct stat st;
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if (fstat(fileno(f), &st) != 0) {
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fclose(f);
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return 0;
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}
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char *data = malloc(st.st_size);
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if (!data) {
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fclose(f);
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return 0;
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}
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if (fread(data, 1, st.st_size, f) != (size_t)st.st_size) {
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fclose(f);
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free(data);
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return 0;
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}
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fclose(f);
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return data;
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}
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static char *terminfo_try_path(const char *path, const char *term) {
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char tmp[4096];
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// snprintf guarantee for older compilers
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assert(sizeof(tmp) > sizeof(path)+sizeof("/x/")+sizeof(term)+1);
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snprintf(tmp, sizeof(tmp), "%s/%c/%s", path, term[0], term);
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char *data = read_file(tmp);
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if (data) {
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return data;
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}
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// fallback to darwin specific dirs structure
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// snprintf guarantee above still applies
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snprintf(tmp, sizeof(tmp), "%s/%x/%s", path, term[0], term);
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return read_file(tmp);
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}
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void string_copy(char* dest, const char* src, int dest_capacity) {
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strncpy(dest, src, dest_capacity-1);
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dest[dest_capacity-1] = '\0';
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}
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void string_append(char* dest, const char* src, int dest_capacity) {
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strncat(dest, src, dest_capacity);
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dest[dest_capacity-1] = '\0';
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}
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static char *load_terminfo(void) {
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char tmp[4096];
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const char *term = getenv("TERM");
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if (!term) {
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return 0;
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}
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// if TERMINFO is set, no other directory should be searched
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const char *terminfo = getenv("TERMINFO");
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if (terminfo) {
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return terminfo_try_path(terminfo, term);
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}
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// next, consider ~/.terminfo
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const char *home = getenv("HOME");
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if (home) {
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// snprintf guarantee for older compilers
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assert(sizeof(tmp) > sizeof(home)+sizeof("/.terminfo")+1);
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string_copy(tmp, home, sizeof(tmp));
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string_append(tmp, "/.terminfo", sizeof(tmp));
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char *data = terminfo_try_path(tmp, term);
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if (data)
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return data;
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}
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// next, TERMINFO_DIRS
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const char *dirs = getenv("TERMINFO_DIRS");
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if (dirs) {
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// snprintf guarantee for older compilers
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assert(sizeof(tmp) > sizeof(dirs));
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string_copy(tmp, dirs, sizeof(tmp));
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char *dir = strtok(tmp, ":");
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while (dir) {
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const char *cdir = dir;
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if (strcmp(cdir, "") == 0) {
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cdir = "/usr/share/terminfo";
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}
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char *data = terminfo_try_path(cdir, term);
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if (data)
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return data;
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dir = strtok(0, ":");
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}
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}
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// fallback to /usr/share/terminfo
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return terminfo_try_path("/usr/share/terminfo", term);
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}
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#define TI_MAGIC 0432
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#define TI_HEADER_LENGTH 12
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#define TB_KEYS_NUM 22
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static const char *terminfo_copy_string(char *data, int str, int table) {
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const int16_t off = *(int16_t*)(data + str);
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const char *src = data + table + off;
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int len = strlen(src);
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char *dst = malloc(len+1);
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memcpy(dst, src, len+1);
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return dst;
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}
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static const int16_t ti_funcs[] = {
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28, 40, 16, 13, 5, 39, 36, 27, 26, 34, 89, 88,
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};
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static const int16_t ti_keys[] = {
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66, 68 /* apparently not a typo; 67 is F10 for whatever reason */, 69,
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70, 71, 72, 73, 74, 75, 67, 216, 217, 77, 59, 76, 164, 82, 81, 87, 61,
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79, 83,
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};
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static int init_term(void) {
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int i;
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char *data = load_terminfo();
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if (!data) {
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init_from_terminfo = false;
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return init_term_builtin();
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}
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int16_t *header = (int16_t*)data;
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if ((header[1] + header[2]) % 2) {
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// old quirk to align everything on word boundaries
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header[2] += 1;
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}
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const int str_offset = TI_HEADER_LENGTH +
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header[1] + header[2] + 2 * header[3];
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const int table_offset = str_offset + 2 * header[4];
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keys = malloc(sizeof(const char*) * (TB_KEYS_NUM+1));
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for (i = 0; i < TB_KEYS_NUM; i++) {
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keys[i] = terminfo_copy_string(data,
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str_offset + 2 * ti_keys[i], table_offset);
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}
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keys[TB_KEYS_NUM] = 0;
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funcs = malloc(sizeof(const char*) * T_FUNCS_NUM);
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// the last four entries are reserved for mouse, bracketed paste. because the table offset is
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// not there, the two entries have to fill in manually
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for (i = 0; i < T_FUNCS_NUM-4; i++) {
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funcs[i] = terminfo_copy_string(data,
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str_offset + 2 * ti_funcs[i], table_offset);
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}
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funcs[T_FUNCS_NUM-4] = "\033[?1000h";
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funcs[T_FUNCS_NUM-3] = "\033[?1000l";
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funcs[T_FUNCS_NUM-2] = "\033[?2004h";
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funcs[T_FUNCS_NUM-1] = "\033[?2004l";
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init_from_terminfo = true;
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free(data);
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return 0;
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}
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static void shutdown_term(void) {
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if (init_from_terminfo) {
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int i;
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for (i = 0; i < TB_KEYS_NUM; i++) {
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free((void*)keys[i]);
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}
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// the last four entries are reserved for mouse, bracketed paste. because the table offset
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// is not there, the two entries have to fill in manually and do not
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// need to be freed.
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for (i = 0; i < T_FUNCS_NUM-4; i++) {
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free((void*)funcs[i]);
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}
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free(keys);
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free(funcs);
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}
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}
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