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-rw-r--r--editors/vi.c229
-rw-r--r--include/libbb.h33
-rw-r--r--libbb/Kbuild1
3 files changed, 78 insertions, 185 deletions
diff --git a/editors/vi.c b/editors/vi.c
index 55154dcd7..0e7b729fe 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -57,34 +57,6 @@ enum {
MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
};
-// "Keycodes" that report an escape sequence.
-// We use something which fits into signed char,
-// yet doesn't represent any valid Unicode characher.
-enum {
- VI_K_UP = -1, // cursor key Up
- VI_K_DOWN = -2, // cursor key Down
- VI_K_RIGHT = -3, // Cursor Key Right
- VI_K_LEFT = -4, // cursor key Left
- VI_K_HOME = -5, // Cursor Key Home
- VI_K_END = -6, // Cursor Key End
- VI_K_INSERT = -7, // Cursor Key Insert
- VI_K_DELETE = -8, // Cursor Key Insert
- VI_K_PAGEUP = -9, // Cursor Key Page Up
- VI_K_PAGEDOWN = -10, // Cursor Key Page Down
- VI_K_FUN1 = -11, // Function Key F1
- VI_K_FUN2 = -12, // Function Key F2
- VI_K_FUN3 = -13, // Function Key F3
- VI_K_FUN4 = -14, // Function Key F4
- VI_K_FUN5 = -15, // Function Key F5
- VI_K_FUN6 = -16, // Function Key F6
- VI_K_FUN7 = -17, // Function Key F7
- VI_K_FUN8 = -18, // Function Key F8
- VI_K_FUN9 = -19, // Function Key F9
- VI_K_FUN10 = -20, // Function Key F10
- VI_K_FUN11 = -21, // Function Key F11
- VI_K_FUN12 = -22, // Function Key F12
-};
-
/* vt102 typical ESC sequence */
/* terminal standout start/normal ESC sequence */
static const char SOs[] ALIGN1 = "\033[7m";
@@ -179,6 +151,7 @@ struct globals {
char erase_char; // the users erase character
char last_input_char; // last char read from user
+ smalluint chars_to_parse;
#if ENABLE_FEATURE_VI_DOT_CMD
smallint adding2q; // are we currently adding user input to q
int lmc_len; // length of last_modifying_cmd
@@ -193,7 +166,7 @@ struct globals {
#if ENABLE_FEATURE_VI_SEARCH
char *last_search_pattern; // last pattern from a '/' or '?' search
#endif
- int chars_to_parse;
+
/* former statics */
#if ENABLE_FEATURE_VI_YANKMARK
char *edit_file__cur_line;
@@ -259,9 +232,10 @@ struct globals {
#define screensize (G.screensize )
#define screenbegin (G.screenbegin )
#define tabstop (G.tabstop )
+#define last_forward_char (G.last_forward_char )
#define erase_char (G.erase_char )
#define last_input_char (G.last_input_char )
-#define last_forward_char (G.last_forward_char )
+#define chars_to_parse (G.chars_to_parse )
#if ENABLE_FEATURE_VI_READONLY
#define readonly_mode (G.readonly_mode )
#else
@@ -274,7 +248,6 @@ struct globals {
#define last_row (G.last_row )
#define my_pid (G.my_pid )
#define last_search_pattern (G.last_search_pattern)
-#define chars_to_parse (G.chars_to_parse )
#define edit_file__cur_line (G.edit_file__cur_line)
#define refresh__old_offset (G.refresh__old_offset)
@@ -2200,130 +2173,14 @@ static int mysleep(int hund) // sleep for 'h' 1/100 seconds
static int readit(void) // read (maybe cursor) key from stdin
{
int c;
- int n;
-
- // Known escape sequences for cursor and function keys.
- static const struct esc_cmds {
- const char seq[4];
- signed char val;
- } esccmds[] = {
- {"OA" , VI_K_UP }, // Cursor Key Up
- {"OB" , VI_K_DOWN }, // Cursor Key Down
- {"OC" , VI_K_RIGHT }, // Cursor Key Right
- {"OD" , VI_K_LEFT }, // Cursor Key Left
- {"OH" , VI_K_HOME }, // Cursor Key Home
- {"OF" , VI_K_END }, // Cursor Key End
- {"OP" , VI_K_FUN1 }, // Function Key F1
- {"OQ" , VI_K_FUN2 }, // Function Key F2
- {"OR" , VI_K_FUN3 }, // Function Key F3
- {"OS" , VI_K_FUN4 }, // Function Key F4
-
- {"[A" , VI_K_UP }, // Cursor Key Up
- {"[B" , VI_K_DOWN }, // Cursor Key Down
- {"[C" , VI_K_RIGHT }, // Cursor Key Right
- {"[D" , VI_K_LEFT }, // Cursor Key Left
- {"[H" , VI_K_HOME }, // Cursor Key Home
- {"[F" , VI_K_END }, // Cursor Key End
- {"[1~" , VI_K_HOME }, // Cursor Key Home
- {"[2~" , VI_K_INSERT }, // Cursor Key Insert
- {"[3~" , VI_K_DELETE }, // Cursor Key Delete
- {"[4~" , VI_K_END }, // Cursor Key End
- {"[5~" , VI_K_PAGEUP }, // Cursor Key Page Up
- {"[6~" , VI_K_PAGEDOWN}, // Cursor Key Page Down
- // careful: these have no terminating NUL!
- {"[11~", VI_K_FUN1 }, // Function Key F1
- {"[12~", VI_K_FUN2 }, // Function Key F2
- {"[13~", VI_K_FUN3 }, // Function Key F3
- {"[14~", VI_K_FUN4 }, // Function Key F4
- {"[15~", VI_K_FUN5 }, // Function Key F5
- {"[17~", VI_K_FUN6 }, // Function Key F6
- {"[18~", VI_K_FUN7 }, // Function Key F7
- {"[19~", VI_K_FUN8 }, // Function Key F8
- {"[20~", VI_K_FUN9 }, // Function Key F9
- {"[21~", VI_K_FUN10 }, // Function Key F10
- {"[23~", VI_K_FUN11 }, // Function Key F11
- {"[24~", VI_K_FUN12 }, // Function Key F12
- };
fflush(stdout);
-
- n = chars_to_parse;
- if (n == 0) {
- // If no data, block waiting for input. (If we read more than the
- // minimal ESC sequence size, the "n=0" below would instead have to
- // figure out how much to keep, resulting in larger code.)
- n = safe_read(0, readbuffer, 3);
- if (n <= 0) {
- error:
- go_bottom_and_clear_to_eol();
- cookmode(); // terminal to "cooked"
- bb_error_msg_and_die("can't read user input");
- }
- }
-
- // Grab character to return from buffer
- c = (unsigned char)readbuffer[0];
- // Returning NUL from this routine would be bad.
- if (c == '\0')
- c = ' ';
- n--;
- if (n) memmove(readbuffer, readbuffer + 1, n);
-
- // If it's an escape sequence, loop through known matches.
- if (c == 27) {
- const struct esc_cmds *eindex;
- struct pollfd pfd;
-
- pfd.fd = STDIN_FILENO;
- pfd.events = POLLIN;
- for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++)
- {
- // n - position in sequence we did not read yet
- int i = 0; // position in sequence to compare
-
- // Loop through chars in this sequence
- for (;;) {
- // So far escape sequence matches up to [i-1]
- if (n <= i) {
- // Need more chars, read another one if it wouldn't block.
- // (Note that escape sequences come in as a unit,
- // so if we would block it's not really an escape sequence.)
-
- // Timeout is needed to reconnect escape sequences
- // split up by transmission over a serial console.
-
- if (safe_poll(&pfd, 1, 50)) {
- if (safe_read(0, readbuffer + n, 1) <= 0)
- goto error;
- n++;
- } else {
- // No more data!
- // Array is sorted from shortest to longest,
- // we can't match anything later in array,
- // break out of both loops.
- goto loop_out;
- }
- }
- if (readbuffer[i] != eindex->seq[i])
- break; // try next seq
- i++;
- if (i == 4 || !eindex->seq[i]) { // entire seq matched
- c = eindex->val; // sign extended!
- n = 0;
- // n -= i; memmove(...);
- // would be more correct,
- // but we never read ahead that much,
- // and n == i here.
- goto loop_out;
- }
- }
- }
- // We did not find matching sequence, it was a bare ESC.
- // We possibly read and stored more input in readbuffer by now.
+ c = read_key(STDIN_FILENO, &chars_to_parse, readbuffer);
+ if (c == -1) { // EOF/error
+ go_bottom_and_clear_to_eol();
+ cookmode(); // terminal to "cooked"
+ bb_error_msg_and_die("can't read user input");
}
- loop_out:
-
- chars_to_parse = n;
return c;
}
@@ -3013,21 +2870,21 @@ static void do_cmd(int c)
/* if this is a cursor key, skip these checks */
switch (c) {
- case VI_K_UP:
- case VI_K_DOWN:
- case VI_K_LEFT:
- case VI_K_RIGHT:
- case VI_K_HOME:
- case VI_K_END:
- case VI_K_PAGEUP:
- case VI_K_PAGEDOWN:
- case VI_K_DELETE:
+ case KEYCODE_UP:
+ case KEYCODE_DOWN:
+ case KEYCODE_LEFT:
+ case KEYCODE_RIGHT:
+ case KEYCODE_HOME:
+ case KEYCODE_END:
+ case KEYCODE_PAGEUP:
+ case KEYCODE_PAGEDOWN:
+ case KEYCODE_DELETE:
goto key_cmd_mode;
}
if (cmd_mode == 2) {
// flip-flop Insert/Replace mode
- if (c == VI_K_INSERT)
+ if (c == KEYCODE_INSERT)
goto dc_i;
// we are 'R'eplacing the current *dot with new char
if (*dot == '\n') {
@@ -3044,7 +2901,7 @@ static void do_cmd(int c)
}
if (cmd_mode == 1) {
// hitting "Insert" twice means "R" replace mode
- if (c == VI_K_INSERT) goto dc5;
+ if (c == KEYCODE_INSERT) goto dc5;
// insert the char c at "dot"
if (1 <= c || Isprint(c)) {
dot = char_insert(dot, c);
@@ -3108,7 +2965,7 @@ static void do_cmd(int c)
case 0x00: // nul- ignore
break;
case 2: // ctrl-B scroll up full screen
- case VI_K_PAGEUP: // Cursor Key Page Up
+ case KEYCODE_PAGEUP: // Cursor Key Page Up
dot_scroll(rows - 2, -1);
break;
case 4: // ctrl-D scroll down half screen
@@ -3118,14 +2975,14 @@ static void do_cmd(int c)
dot_scroll(1, 1);
break;
case 6: // ctrl-F scroll down full screen
- case VI_K_PAGEDOWN: // Cursor Key Page Down
+ case KEYCODE_PAGEDOWN: // Cursor Key Page Down
dot_scroll(rows - 2, 1);
break;
case 7: // ctrl-G show current status
last_status_cksum = 0; // force status update
break;
case 'h': // h- move left
- case VI_K_LEFT: // cursor key Left
+ case KEYCODE_LEFT: // cursor key Left
case 8: // ctrl-H- move left (This may be ERASE char)
case 0x7f: // DEL- move left (This may be ERASE char)
if (cmdcnt-- > 1) {
@@ -3135,7 +2992,7 @@ static void do_cmd(int c)
break;
case 10: // Newline ^J
case 'j': // j- goto next line, same col
- case VI_K_DOWN: // cursor key Down
+ case KEYCODE_DOWN: // cursor key Down
if (cmdcnt-- > 1) {
do_cmd(c);
} // repeat cnt
@@ -3174,7 +3031,7 @@ static void do_cmd(int c)
break;
case ' ': // move right
case 'l': // move right
- case VI_K_RIGHT: // Cursor Key Right
+ case KEYCODE_RIGHT: // Cursor Key Right
if (cmdcnt-- > 1) {
do_cmd(c);
} // repeat cnt
@@ -3259,7 +3116,7 @@ static void do_cmd(int c)
break;
#endif /* FEATURE_VI_YANKMARK */
case '$': // $- goto end of line
- case VI_K_END: // Cursor Key End
+ case KEYCODE_END: // Cursor Key End
if (cmdcnt-- > 1) {
do_cmd(c);
} // repeat cnt
@@ -3584,7 +3441,7 @@ static void do_cmd(int c)
dot_skip_over_ws();
//**** fall through to ... 'i'
case 'i': // i- insert before current char
- case VI_K_INSERT: // Cursor Key Insert
+ case KEYCODE_INSERT: // Cursor Key Insert
dc_i:
cmd_mode = 1; // start insrting
break;
@@ -3637,7 +3494,7 @@ static void do_cmd(int c)
dc5:
cmd_mode = 2;
break;
- case VI_K_DELETE:
+ case KEYCODE_DELETE:
c = 'x';
// fall through
case 'X': // X- delete char before dot
@@ -3787,7 +3644,7 @@ static void do_cmd(int c)
break;
}
case 'k': // k- goto prev line, same col
- case VI_K_UP: // cursor key Up
+ case KEYCODE_UP: // cursor key Up
if (cmdcnt-- > 1) {
do_cmd(c);
} // repeat cnt
@@ -3852,23 +3709,25 @@ static void do_cmd(int c)
end_cmd_q(); // stop adding to q
break;
//----- The Cursor and Function Keys -----------------------------
- case VI_K_HOME: // Cursor Key Home
+ case KEYCODE_HOME: // Cursor Key Home
dot_begin();
break;
// The Fn keys could point to do_macro which could translate them
- case VI_K_FUN1: // Function Key F1
- case VI_K_FUN2: // Function Key F2
- case VI_K_FUN3: // Function Key F3
- case VI_K_FUN4: // Function Key F4
- case VI_K_FUN5: // Function Key F5
- case VI_K_FUN6: // Function Key F6
- case VI_K_FUN7: // Function Key F7
- case VI_K_FUN8: // Function Key F8
- case VI_K_FUN9: // Function Key F9
- case VI_K_FUN10: // Function Key F10
- case VI_K_FUN11: // Function Key F11
- case VI_K_FUN12: // Function Key F12
+#if 0
+ case KEYCODE_FUN1: // Function Key F1
+ case KEYCODE_FUN2: // Function Key F2
+ case KEYCODE_FUN3: // Function Key F3
+ case KEYCODE_FUN4: // Function Key F4
+ case KEYCODE_FUN5: // Function Key F5
+ case KEYCODE_FUN6: // Function Key F6
+ case KEYCODE_FUN7: // Function Key F7
+ case KEYCODE_FUN8: // Function Key F8
+ case KEYCODE_FUN9: // Function Key F9
+ case KEYCODE_FUN10: // Function Key F10
+ case KEYCODE_FUN11: // Function Key F11
+ case KEYCODE_FUN12: // Function Key F12
break;
+#endif
}
dc1:
diff --git a/include/libbb.h b/include/libbb.h
index 5b92574dd..931710962 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -921,6 +921,39 @@ void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
#endif
+/* "Keycodes" that report an escape sequence.
+ * We use something which fits into signed char,
+ * yet doesn't represent any valid Unicode characher.
+ * Also, -1 is reserved for error indication and we don't use it. */
+enum {
+ KEYCODE_UP = -2,
+ KEYCODE_DOWN = -3,
+ KEYCODE_RIGHT = -4,
+ KEYCODE_LEFT = -5,
+ KEYCODE_HOME = -6,
+ KEYCODE_END = -7,
+ KEYCODE_INSERT = -8,
+ KEYCODE_DELETE = -9,
+ KEYCODE_PAGEUP = -10,
+ KEYCODE_PAGEDOWN = -11,
+#if 0
+ KEYCODE_FUN1 = -12,
+ KEYCODE_FUN2 = -13,
+ KEYCODE_FUN3 = -14,
+ KEYCODE_FUN4 = -15,
+ KEYCODE_FUN5 = -16,
+ KEYCODE_FUN6 = -17,
+ KEYCODE_FUN7 = -18,
+ KEYCODE_FUN8 = -19,
+ KEYCODE_FUN9 = -20,
+ KEYCODE_FUN10 = -21,
+ KEYCODE_FUN11 = -22,
+ KEYCODE_FUN12 = -23,
+#endif
+};
+int read_key(int fd, smalluint *nbuffered, char *buffer) FAST_FUNC;
+
+
/* Networking */
int create_icmp_socket(void) FAST_FUNC;
int create_icmp6_socket(void) FAST_FUNC;
diff --git a/libbb/Kbuild b/libbb/Kbuild
index 726200675..786cbee80 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -75,6 +75,7 @@ lib-y += process_escape_sequence.o
lib-y += procps.o
lib-y += ptr_to_globals.o
lib-y += read.o
+lib-y += read_key.o
lib-y += recursive_action.o
lib-y += remove_file.o
lib-y += restricted_shell.o
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 11:58:56 +0000