* tiny vi.c: A small 'vi' clone
* Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/*
#if ENABLE_LOCALE_SUPPORT
#if ENABLE_FEATURE_VI_8BIT
-#define Isprint(c) isprint(c)
+//FIXME: this does not work properly for Unicode anyway
+# define Isprint(c) (isprint)(c)
#else
-#define Isprint(c) (isprint(c) && (unsigned char)(c) < 0x7f)
+# define Isprint(c) isprint_asciionly(c)
#endif
#else
/* vt102 typical ESC sequence */
/* terminal standout start/normal ESC sequence */
-static const char SOs[] ALIGN1 = "\033[7m";
-static const char SOn[] ALIGN1 = "\033[0m";
+#define SOs "\033[7m"
+#define SOn "\033[0m"
/* terminal bell sequence */
-static const char bell[] ALIGN1 = "\007";
+#define bell "\007"
/* Clear-end-of-line and Clear-end-of-screen ESC sequence */
-static const char Ceol[] ALIGN1 = "\033[0K";
-static const char Ceos[] ALIGN1 = "\033[0J";
+#define Ceol "\033[K"
+#define Ceos "\033[J"
/* Cursor motion arbitrary destination ESC sequence */
-static const char CMrc[] ALIGN1 = "\033[%d;%dH";
+#define CMrc "\033[%u;%uH"
/* Cursor motion up and down ESC sequence */
-static const char CMup[] ALIGN1 = "\033[A";
-static const char CMdown[] ALIGN1 = "\n";
+#define CMup "\033[A"
+#define CMdown "\n"
#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
// cmds modifying text[]
int save_argc; // how many file names on cmd line
int cmdcnt; // repetition count
unsigned rows, columns; // the terminal screen is this size
+#if ENABLE_FEATURE_VI_ASK_TERMINAL
+ int get_rowcol_error;
+#endif
int crow, ccol; // cursor is on Crow x Ccol
int offset; // chars scrolled off the screen to the left
int have_status_msg; // is default edit status needed?
save_argc = argc;
//----- This is the main file handling loop --------------
- if (optind >= argc) {
- edit_file(0);
- } else {
- for (; optind < argc; optind++) {
- edit_file(argv[optind]);
- }
+ while (1) {
+ edit_file(argv[optind]); /* param might be NULL */
+ if (++optind >= argc)
+ break;
}
//-----------------------------------------------------------
return rc;
}
+#if ENABLE_FEATURE_VI_WIN_RESIZE
+static int query_screen_dimensions(void)
+{
+ int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
+ if (rows > MAX_SCR_ROWS)
+ rows = MAX_SCR_ROWS;
+ if (columns > MAX_SCR_COLS)
+ columns = MAX_SCR_COLS;
+ return err;
+}
+#else
+# define query_screen_dimensions() (0)
+#endif
+
static void edit_file(char *fn)
{
#if ENABLE_FEATURE_VI_YANKMARK
rows = 24;
columns = 80;
size = 0;
- if (ENABLE_FEATURE_VI_WIN_RESIZE) {
- get_terminal_width_height(0, &columns, &rows);
- if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
- if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
+ IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
+#if ENABLE_FEATURE_VI_ASK_TERMINAL
+ if (G.get_rowcol_error /* TODO? && no input on stdin */) {
+ uint64_t k;
+ write1("\033[999;999H" "\033[6n");
+ fflush_all();
+ k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
+ if ((int32_t)k == KEYCODE_CURSOR_POS) {
+ uint32_t rc = (k >> 32);
+ columns = (rc & 0x7fff);
+ if (columns > MAX_SCR_COLS)
+ columns = MAX_SCR_COLS;
+ rows = ((rc >> 16) & 0x7fff);
+ if (rows > MAX_SCR_ROWS)
+ rows = MAX_SCR_ROWS;
+ }
}
+#endif
new_screen(rows, columns); // get memory for virtual screen
init_text_buffer(fn);
ccol = 0;
#if ENABLE_FEATURE_VI_USE_SIGNALS
- catch_sig(0);
+ signal(SIGINT, catch_sig);
signal(SIGWINCH, winch_sig);
signal(SIGTSTP, suspend_sig);
sig = sigsetjmp(restart, 1);
char *p, *q;
int n = 0;
- while ((p = initial_cmds[n])) {
+ while ((p = initial_cmds[n]) != NULL) {
do {
q = p;
p = strchr(q, '\n');
//
if (!buf[0])
- goto vc1;
+ goto ret;
if (*buf == ':')
buf++; // move past the ':'
// don't edit, if the current file has been modified
if (file_modified && !useforce) {
status_line_bold("No write since last change (:edit! overrides)");
- goto vc1;
+ goto ret;
}
if (args[0]) {
// the user supplied a file name
} else {
// no user file name, no current name- punt
status_line_bold("No current filename");
- goto vc1;
+ goto ret;
}
if (init_text_buffer(fn) < 0)
- goto vc1;
+ goto ret;
#if ENABLE_FEATURE_VI_YANKMARK
if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
li, ch);
} else if (strncmp(cmd, "file", i) == 0) { // what File is this
if (b != -1 || e != -1) {
- not_implemented("No address allowed on this command");
- goto vc1;
+ status_line_bold("No address allowed on this command");
+ goto ret;
}
if (args[0]) {
// user wants a new filename
if (c_is_no_print)
standout_end();
}
-#if ENABLE_FEATURE_VI_SET
- vc2:
-#endif
Hit_Return();
- } else if (strncmp(cmd, "quit", i) == 0 // Quit
+ } else if (strncmp(cmd, "quit", i) == 0 // quit
|| strncmp(cmd, "next", i) == 0 // edit next file
) {
+ int n;
if (useforce) {
// force end of argv list
if (*cmd == 'q') {
optind = save_argc;
}
editing = 0;
- goto vc1;
+ goto ret;
}
// don't exit if the file been modified
if (file_modified) {
status_line_bold("No write since last change (:%s! overrides)",
(*cmd == 'q' ? "quit" : "next"));
- goto vc1;
+ goto ret;
}
// are there other file to edit
- if (*cmd == 'q' && optind < save_argc - 1) {
- status_line_bold("%d more file to edit", (save_argc - optind - 1));
- goto vc1;
+ n = save_argc - optind - 1;
+ if (*cmd == 'q' && n > 0) {
+ status_line_bold("%d more file(s) to edit", n);
+ goto ret;
}
- if (*cmd == 'n' && optind >= save_argc - 1) {
+ if (*cmd == 'n' && n <= 0) {
status_line_bold("No more files to edit");
- goto vc1;
+ goto ret;
}
editing = 0;
} else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
fn = args;
if (!fn[0]) {
status_line_bold("No filename given");
- goto vc1;
+ goto ret;
}
if (b < 0) { // no addr given- use defaults
q = begin_line(dot); // assume "dot"
q = text + ofs;
}
if (ch < 0)
- goto vc1; // nothing was inserted
+ goto ret; // nothing was inserted
// how many lines in text[]?
li = count_lines(q, q + ch - 1);
status_line("\"%s\""
// only blank is regarded as args delmiter. What about tab '\t' ?
if (!args[0] || strcasecmp(args, "all") == 0) {
// print out values of all options
- go_bottom_and_clear_to_eol();
- printf("----------------------------------------\r\n");
#if ENABLE_FEATURE_VI_SETOPTS
- if (!autoindent)
- printf("no");
- printf("autoindent ");
- if (!err_method)
- printf("no");
- printf("flash ");
- if (!ignorecase)
- printf("no");
- printf("ignorecase ");
- if (!showmatch)
- printf("no");
- printf("showmatch ");
- printf("tabstop=%d ", tabstop);
-#endif
- printf("\r\n");
- goto vc2;
+ status_line_bold(
+ "%sautoindent "
+ "%sflash "
+ "%signorecase "
+ "%sshowmatch "
+ "tabstop=%u",
+ autoindent ? "" : "no",
+ err_method ? "" : "no",
+ ignorecase ? "" : "no",
+ showmatch ? "" : "no",
+ tabstop
+ );
+#endif
+ goto ret;
}
#if ENABLE_FEATURE_VI_SETOPTS
argp = args;
if (strncmp(argp, "no", 2) == 0)
i = 2; // ":set noautoindent"
setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
- setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
+ setops(argp, "flash " , i, "fl", VI_ERR_METHOD);
setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
- setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
- /* tabstopXXXX */
- if (strncmp(argp + i, "tabstop=%d ", 7) == 0) {
- sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
- if (ch > 0 && ch <= MAX_TABSTOP)
- tabstop = ch;
+ setops(argp, "showmatch " , i, "sm", VI_SHOWMATCH );
+ if (strncmp(argp + i, "tabstop=", 8) == 0) {
+ int t = 0;
+ sscanf(argp + i+8, "%u", &t);
+ if (t > 0 && t <= MAX_TABSTOP)
+ tabstop = t;
}
- while (*argp && *argp != ' ')
- argp++; // skip to arg delimiter (i.e. blank)
- while (*argp && *argp == ' ')
- argp++; // skip all delimiting blanks
+ argp = skip_non_whitespace(argp);
+ argp = skip_whitespace(argp);
}
#endif /* FEATURE_VI_SETOPTS */
#endif /* FEATURE_VI_SET */
#if ENABLE_FEATURE_VI_READONLY
if (readonly_mode && !useforce) {
status_line_bold("\"%s\" File is read only", fn);
- goto vc3;
+ goto ret;
}
#endif
// how many lines in text[]?
file_modified = 0;
last_file_modified = -1;
}
- if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
- cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
- && l == ch) {
+ if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
+ || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
+ )
+ && l == ch
+ ) {
editing = 0;
}
}
-#if ENABLE_FEATURE_VI_READONLY
- vc3:;
-#endif
#if ENABLE_FEATURE_VI_YANKMARK
} else if (strncmp(cmd, "yank", i) == 0) { // yank lines
if (b < 0) { // no addr given- use defaults
// cmd unknown
not_implemented(cmd);
}
- vc1:
+ ret:
dot = bound_dot(dot); // make sure "dot" is valid
return;
#if ENABLE_FEATURE_VI_SEARCH
if (type == S_BEFORE_WS) {
c = ci;
- test = ((!isspace(c)) || c == '\n');
+ test = (!isspace(c) || c == '\n');
}
if (type == S_TO_WS) {
c = c0;
- test = ((!isspace(c)) || c == '\n');
+ test = (!isspace(c) || c == '\n');
}
if (type == S_OVER_WS) {
c = c0;
- test = ((isspace(c)));
+ test = isspace(c);
}
if (type == S_END_PUNCT) {
c = ci;
- test = ((ispunct(c)));
+ test = ispunct(c);
}
if (type == S_END_ALNUM) {
c = ci;
- test = ((isalnum(c)) || c == '_');
+ test = (isalnum(c) || c == '_');
}
*tested = c;
return test;
static void cookmode(void)
{
- fflush(stdout);
+ fflush_all();
tcsetattr_stdin_TCSANOW(&term_orig);
}
-//----- Come here when we get a window resize signal ---------
#if ENABLE_FEATURE_VI_USE_SIGNALS
+//----- Come here when we get a window resize signal ---------
static void winch_sig(int sig UNUSED_PARAM)
{
+ int save_errno = errno;
// FIXME: do it in main loop!!!
signal(SIGWINCH, winch_sig);
- if (ENABLE_FEATURE_VI_WIN_RESIZE) {
- get_terminal_width_height(0, &columns, &rows);
- if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
- if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
- }
+ query_screen_dimensions();
new_screen(rows, columns); // get memory for virtual screen
redraw(TRUE); // re-draw the screen
+ errno = save_errno;
}
//----- Come here when we get a continue signal -------------------
static void cont_sig(int sig UNUSED_PARAM)
{
+ int save_errno = errno;
rawmode(); // terminal to "raw"
last_status_cksum = 0; // force status update
redraw(TRUE); // re-draw the screen
signal(SIGTSTP, suspend_sig);
signal(SIGCONT, SIG_DFL);
- kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
+ //kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
+ errno = save_errno;
}
//----- Come here when we get a Suspend signal -------------------
static void suspend_sig(int sig UNUSED_PARAM)
{
+ int save_errno = errno;
go_bottom_and_clear_to_eol();
cookmode(); // terminal to "cooked"
signal(SIGCONT, cont_sig);
signal(SIGTSTP, SIG_DFL);
kill(my_pid, SIGTSTP);
+ errno = save_errno;
}
//----- Come here when we get a signal ---------------------------
static void catch_sig(int sig)
{
signal(SIGINT, catch_sig);
- if (sig)
- siglongjmp(restart, sig);
+ siglongjmp(restart, sig);
}
#endif /* FEATURE_VI_USE_SIGNALS */
{
int c;
- fflush(stdout);
- c = read_key(STDIN_FILENO, readbuffer);
+ fflush_all();
+ c = read_key(STDIN_FILENO, readbuffer, /*timeout off:*/ -2);
if (c == -1) { // EOF/error
go_bottom_and_clear_to_eol();
cookmode(); // terminal to "cooked"
int cnt;
cnt = -1;
- if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
+ if (fn && stat(fn, &st_buf) == 0) // see if file exists
cnt = (int) st_buf.st_size;
return cnt;
}
} else if (cnt < size) {
// There was a partial read, shrink unused space text[]
p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
- status_line_bold("cannot read all of file \"%s\"", fn);
+ status_line_bold("can't read all of file \"%s\"", fn);
}
if (cnt >= size)
file_modified++;
status_line_bold("No current filename");
return -2;
}
- charcnt = 0;
/* By popular request we do not open file with O_TRUNC,
* but instead ftruncate() it _after_ successful write.
* Might reduce amount of data lost on power fail etc.
}
place_cursor(crow, ccol, FALSE); // put cursor back in correct place
}
- fflush(stdout);
+ fflush_all();
}
//----- format the status buffer, the bottom line of screen ------
// copy s to buf, convert unprintable
static void print_literal(char *buf, const char *s)
{
+ char *d;
unsigned char c;
- char b[2];
- b[1] = '\0';
buf[0] = '\0';
if (!s[0])
s = "(NULL)";
+
+ d = buf;
for (; *s; s++) {
int c_is_no_print;
c = *s;
c_is_no_print = (c & 0x80) && !Isprint(c);
if (c_is_no_print) {
- strcat(buf, SOn);
+ strcpy(d, SOn);
+ d += sizeof(SOn)-1;
c = '.';
}
- if (c < ' ' || c == 127) {
- strcat(buf, "^");
- if (c == 127)
+ if (c < ' ' || c == 0x7f) {
+ *d++ = '^';
+ c |= '@'; /* 0x40 */
+ if (c == 0x7f)
c = '?';
- else
- c += '@';
- }
- b[0] = c;
- strcat(buf, b);
- if (c_is_no_print)
- strcat(buf, SOs);
- if (*s == '\n')
- strcat(buf, "$");
- if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
+ }
+ *d++ = c;
+ *d = '\0';
+ if (c_is_no_print) {
+ strcpy(d, SOs);
+ d += sizeof(SOs)-1;
+ }
+ if (*s == '\n') {
+ *d++ = '$';
+ *d = '\0';
+ }
+ if (d - buf > MAX_INPUT_LEN - 10) // paranoia
break;
}
}
int li, changed;
char *tp, *sp; // pointer into text[] and screen[]
- if (ENABLE_FEATURE_VI_WIN_RESIZE) {
+ if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
unsigned c = columns, r = rows;
- get_terminal_width_height(0, &columns, &rows);
- if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
- if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
+ query_screen_dimensions();
full_screen |= (c - columns) | (r - rows);
}
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
default: // unrecognized command
buf[0] = c;
buf[1] = '\0';
- if (c < ' ') {
- buf[0] = '^';
- buf[1] = c + '@';
- buf[2] = '\0';
- }
not_implemented(buf);
end_cmd_q(); // stop adding to q
case 0x00: // nul- ignore
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) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_left();
break;
case 10: // Newline ^J
case 'j': // j- goto next line, same col
case KEYCODE_DOWN: // cursor key Down
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_next(); // go to next B-o-l
dot = move_to_col(dot, ccol + offset); // try stay in same col
break;
break;
case 13: // Carriage Return ^M
case '+': // +- goto next line
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_next();
dot_skip_over_ws();
break;
case ' ': // move right
case 'l': // move right
case KEYCODE_RIGHT: // Cursor Key Right
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_right();
break;
#if ENABLE_FEATURE_VI_YANKMARK
#endif /* FEATURE_VI_YANKMARK */
case '$': // $- goto end of line
case KEYCODE_END: // Cursor Key End
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
+ dot_next();
do_cmd(c);
- } // repeat cnt
+ }
dot = end_line(dot);
break;
case '%': // %- find matching char of pair () [] {}
//
//**** fall through to ... ';'
case ';': // ;- look at rest of line for last forward char
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(';');
- } // repeat cnt
+ }
if (last_forward_char == 0)
break;
q = dot + 1;
dot = q;
break;
case ',': // repeat latest 'f' in opposite direction
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(',');
- } // repeat cnt
+ }
if (last_forward_char == 0)
break;
q = dot - 1;
break;
case '-': // -- goto prev line
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_prev();
dot_skip_over_ws();
break;
// user changed mind and erased the "/"- do nothing
break;
case 'N': // N- backward search for last pattern
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dir = BACK; // assume BACKWARD search
p = dot - 1;
if (last_search_pattern[0] == '?') {
case 'n': // n- repeat search for last pattern
// search rest of text[] starting at next char
// if search fails return orignal "p" not the "p+1" address
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dc3:
dir = FORWARD; // assume FORWARD search
p = dot + 1;
case 'B': // B- back a blank-delimited Word
case 'E': // E- end of a blank-delimited word
case 'W': // W- forward a blank-delimited word
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dir = FORWARD;
if (c == 'B')
dir = BACK;
if (cmdcnt > (rows - 1)) {
cmdcnt = (rows - 1);
}
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd('+');
- } // repeat cnt
+ }
dot_skip_over_ws();
break;
case 'I': // I- insert before first non-blank
cmd_mode = 1; // start insrting
break;
case 'J': // J- join current and next lines together
- if (cmdcnt-- > 2) {
+ if (--cmdcnt > 1) {
do_cmd(c);
- } // repeat cnt
+ }
dot_end(); // move to NL
if (dot < end - 1) { // make sure not last char in text[]
*dot++ = ' '; // replace NL with space
if (cmdcnt > (rows - 1)) {
cmdcnt = (rows - 1);
}
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd('-');
- } // repeat cnt
+ }
dot_begin();
dot_skip_over_ws();
break;
case 'X': // X- delete char before dot
case 'x': // x- delete the current char
case 's': // s- substitute the current char
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dir = 0;
if (c == 'X')
dir = -1;
break;
case 'b': // b- back a word
case 'e': // e- end of word
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dir = FORWARD;
if (c == 'b')
dir = BACK;
}
case 'k': // k- goto prev line, same col
case KEYCODE_UP: // cursor key Up
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
dot_prev();
dot = move_to_col(dot, ccol + offset); // try stay in same col
break;
last_forward_char = 0;
break;
case 'w': // w- forward a word
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
} else if (ispunct(*dot)) { // we are on PUNCT
dot = move_to_col(dot, cmdcnt - 1); // try to move to column
break;
case '~': // ~- flip the case of letters a-z -> A-Z
- if (cmdcnt-- > 1) {
+ if (--cmdcnt > 0) {
do_cmd(c);
- } // repeat cnt
+ }
if (islower(*dot)) {
*dot = toupper(*dot);
file_modified++;
if (msg[0]) {
printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
totalcmds, last_input_char, msg, SOs, SOn);
- fflush(stdout);
+ fflush_all();
while (safe_read(STDIN_FILENO, d, 1) > 0) {
if (d[0] == '\n' || d[0] == '\r')
break;
projects / oweals / busybox.git / blobdiff