add help text
[oweals/busybox.git] / libbb / lineedit.c
index 5dd835ccad95bc4858d79a5a779bdaa44a265a16..0563e6d011599e6dbf08f4e13579e3b1cee3cdac 100644 (file)
@@ -204,65 +204,82 @@ static void deinit_S(void)
 #if ENABLE_UNICODE_SUPPORT
 static size_t load_string(const char *src, int maxsize)
 {
-       ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
-       if (len < 0)
-               len = 0;
-       command_ps[len] = BB_NUL;
-       return len;
+       if (unicode_status == UNICODE_ON) {
+               ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
+               if (len < 0)
+                       len = 0;
+               command_ps[len] = BB_NUL;
+               return len;
+       } else {
+               unsigned i = 0;
+               while ((command_ps[i] = src[i]) != 0)
+                       i++;
+               return i;
+       }
 }
 static unsigned save_string(char *dst, unsigned maxsize)
 {
+       if (unicode_status == UNICODE_ON) {
 # if !ENABLE_UNICODE_PRESERVE_BROKEN
-       ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
-       if (len < 0)
-               len = 0;
-       dst[len] = '\0';
-       return len;
+               ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
+               if (len < 0)
+                       len = 0;
+               dst[len] = '\0';
+               return len;
 # else
-       unsigned dstpos = 0;
-       unsigned srcpos = 0;
+               unsigned dstpos = 0;
+               unsigned srcpos = 0;
 
-       maxsize--;
-       while (dstpos < maxsize) {
-               wchar_t wc;
-               int n = srcpos;
+               maxsize--;
+               while (dstpos < maxsize) {
+                       wchar_t wc;
+                       int n = srcpos;
 
-               /* Convert up to 1st invalid byte (or up to end) */
-               while ((wc = command_ps[srcpos]) != BB_NUL
-                   && !unicode_is_raw_byte(wc)
-               ) {
+                       /* Convert up to 1st invalid byte (or up to end) */
+                       while ((wc = command_ps[srcpos]) != BB_NUL
+                           && !unicode_is_raw_byte(wc)
+                       ) {
+                               srcpos++;
+                       }
+                       command_ps[srcpos] = BB_NUL;
+                       n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
+                       if (n < 0) /* should not happen */
+                               break;
+                       dstpos += n;
+                       if (wc == BB_NUL) /* usually is */
+                               break;
+
+                       /* We do have invalid byte here! */
+                       command_ps[srcpos] = wc; /* restore it */
                        srcpos++;
+                       if (dstpos == maxsize)
+                               break;
+                       dst[dstpos++] = (char) wc;
                }
-               command_ps[srcpos] = BB_NUL;
-               n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
-               if (n < 0) /* should not happen */
-                       break;
-               dstpos += n;
-               if (wc == BB_NUL) /* usually is */
-                       break;
-
-               /* We do have invalid byte here! */
-               command_ps[srcpos] = wc; /* restore it */
-               srcpos++;
-               if (dstpos == maxsize)
-                       break;
-               dst[dstpos++] = (char) wc;
-       }
-       dst[dstpos] = '\0';
-       return dstpos;
+               dst[dstpos] = '\0';
+               return dstpos;
 # endif
+       } else {
+               unsigned i = 0;
+               while ((dst[i] = command_ps[i]) != 0)
+                       i++;
+               return i;
+       }
 }
 /* I thought just fputwc(c, stdout) would work. But no... */
 static void BB_PUTCHAR(wchar_t c)
 {
-       char buf[MB_CUR_MAX + 1];
-       mbstate_t mbst = { 0 };
-       ssize_t len;
-
-       len = wcrtomb(buf, c, &mbst);
-       if (len > 0) {
-               buf[len] = '\0';
-               fputs(buf, stdout);
+       if (unicode_status == UNICODE_ON) {
+               char buf[MB_CUR_MAX + 1];
+               mbstate_t mbst = { 0 };
+               ssize_t len = wcrtomb(buf, c, &mbst);
+               if (len > 0) {
+                       buf[len] = '\0';
+                       fputs(buf, stdout);
+               }
+       } else {
+               /* In this case, c is always one byte */
+               putchar(c);
        }
 }
 # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
@@ -1226,12 +1243,26 @@ line_input_t* FAST_FUNC new_line_input_t(int flags)
 {
        line_input_t *n = xzalloc(sizeof(*n));
        n->flags = flags;
+       n->max_history = MAX_HISTORY;
        return n;
 }
 
 
 #if MAX_HISTORY > 0
 
+unsigned size_from_HISTFILESIZE(const char *hp)
+{
+       int size = MAX_HISTORY;
+       if (hp) {
+               size = atoi(hp);
+               if (size <= 0)
+                       return 1;
+               if (size > MAX_HISTORY)
+                       return MAX_HISTORY;
+       }
+       return size;
+}
+
 static void save_command_ps_at_cur_history(void)
 {
        if (command_ps[0] != BB_NUL) {
@@ -1322,7 +1353,7 @@ static void load_history(line_input_t *st_parm)
                        temp_h[idx] = line;
                        st_parm->cnt_history_in_file++;
                        idx++;
-                       if (idx == MAX_HISTORY)
+                       if (idx == st_parm->max_history)
                                idx = 0;
                }
                fclose(fp);
@@ -1331,18 +1362,18 @@ static void load_history(line_input_t *st_parm)
                if (st_parm->cnt_history_in_file) {
                        while (temp_h[idx] == NULL) {
                                idx++;
-                               if (idx == MAX_HISTORY)
+                               if (idx == st_parm->max_history)
                                        idx = 0;
                        }
                }
 
                /* copy temp_h[] to st_parm->history[] */
-               for (i = 0; i < MAX_HISTORY;) {
+               for (i = 0; i < st_parm->max_history;) {
                        line = temp_h[idx];
                        if (!line)
                                break;
                        idx++;
-                       if (idx == MAX_HISTORY)
+                       if (idx == st_parm->max_history)
                                idx = 0;
                        line_len = strlen(line);
                        if (line_len >= MAX_LINELEN)
@@ -1373,7 +1404,7 @@ static void save_history(char *str)
 
        /* did we write so much that history file needs trimming? */
        state->cnt_history_in_file++;
-       if (state->cnt_history_in_file > MAX_HISTORY * 4) {
+       if (state->cnt_history_in_file > state->max_history * 4) {
                char *new_name;
                line_input_t *st_temp;
 
@@ -1381,6 +1412,7 @@ static void save_history(char *str)
                 * load them */
                st_temp = new_line_input_t(state->flags);
                st_temp->hist_file = state->hist_file;
+               st_temp->max_history = state->max_history;
                load_history(st_temp);
 
                /* write out temp file and replace hist_file atomically */
@@ -1419,20 +1451,20 @@ static void remember_in_history(char *str)
        if (i && strcmp(state->history[i-1], str) == 0)
                return;
 
-       free(state->history[MAX_HISTORY]); /* redundant, paranoia */
-       state->history[MAX_HISTORY] = NULL; /* redundant, paranoia */
+       free(state->history[state->max_history]); /* redundant, paranoia */
+       state->history[state->max_history] = NULL; /* redundant, paranoia */
 
        /* If history[] is full, remove the oldest command */
-       /* we need to keep history[MAX_HISTORY] empty, hence >=, not > */
-       if (i >= MAX_HISTORY) {
+       /* we need to keep history[state->max_history] empty, hence >=, not > */
+       if (i >= state->max_history) {
                free(state->history[0]);
-               for (i = 0; i < MAX_HISTORY-1; i++)
+               for (i = 0; i < state->max_history-1; i++)
                        state->history[i] = state->history[i+1];
-               /* i == MAX_HISTORY-1 */
+               /* i == state->max_history-1 */
        }
-       /* i <= MAX_HISTORY-1 */
+       /* i <= state->max_history-1 */
        state->history[i++] = xstrdup(str);
-       /* i <= MAX_HISTORY */
+       /* i <= state->max_history */
        state->cur_history = i;
        state->cnt_history = i;
 # if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
@@ -1809,10 +1841,9 @@ static void win_changed(int nsig)
        errno = sv_errno;
 }
 
-static int lineedit_read_key(char *read_key_buffer)
+static int lineedit_read_key(char *read_key_buffer, int timeout)
 {
        int64_t ic;
-       int timeout = -1;
 #if ENABLE_UNICODE_SUPPORT
        char unicode_buf[MB_CUR_MAX + 1];
        int unicode_idx = 0;
@@ -1917,7 +1948,7 @@ static int isrtl_str(void)
  * 0  on ctrl-C (the line entered is still returned in 'command'),
  * >0 length of input string, including terminating '\n'
  */
-int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st)
+int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
 {
        int len;
 #if ENABLE_FEATURE_TAB_COMPLETION
@@ -1954,7 +1985,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
                maxsize = MAX_LINELEN;
        S.maxsize = maxsize;
 
-       /* With null flags, no other fields are ever used */
+       /* With zero flags, no other fields are ever used */
        state = st ? st : (line_input_t*) &const_int_0;
 #if MAX_HISTORY > 0
 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
@@ -1991,7 +2022,6 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
        new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
        tcsetattr_stdin_TCSANOW(&new_settings);
 
-       /* Now initialize things */
        previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
        win_changed(0); /* do initial resizing */
 #if ENABLE_USERNAME_OR_HOMEDIR
@@ -2007,7 +2037,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
 #endif
 
 #if 0
-       for (i = 0; i <= MAX_HISTORY; i++)
+       for (i = 0; i <= state->max_history; i++)
                bb_error_msg("history[%d]:'%s'", i, state->history[i]);
        bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
 #endif
@@ -2033,7 +2063,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
                int32_t ic, ic_raw;
 
                fflush_all();
-               ic = ic_raw = lineedit_read_key(read_key_buffer);
+               ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
 
 #if ENABLE_FEATURE_EDITING_VI
                newdelflag = 1;
@@ -2194,7 +2224,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
                case 'd'|VI_CMDMODE_BIT: {
                        int nc, sc;
 
-                       ic = lineedit_read_key(read_key_buffer);
+                       ic = lineedit_read_key(read_key_buffer, timeout);
                        if (errno) /* error */
                                goto return_error_indicator;
                        if (ic == ic_raw) { /* "cc", "dd" */
@@ -2258,7 +2288,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
                        break;
                case 'r'|VI_CMDMODE_BIT:
 //FIXME: unicode case?
-                       ic = lineedit_read_key(read_key_buffer);
+                       ic = lineedit_read_key(read_key_buffer, timeout);
                        if (errno) /* error */
                                goto return_error_indicator;
                        if (ic < ' ' || ic > 255) {