/* vi: set sw=4 ts=4: */
/*
- * Termios command line History and Editing.
+ * Command line editing.
*
* Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
* Written by: Vladimir Oleynik <dzo@simtreas.ru>
{
#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
/* This one is allocated only if FANCY_PROMPT is on
- * (otherwise it points to verbatim prompt (NOT malloced) */
+ * (otherwise it points to verbatim prompt (NOT malloced)) */
free((char*)cmdedit_prompt);
#endif
#if ENABLE_USERNAME_OR_HOMEDIR
ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
if (len < 0)
len = 0;
- command_ps[len] = 0;
+ command_ps[len] = BB_NUL;
return len;
}
static unsigned save_string(char *dst, unsigned maxsize)
int n = srcpos;
/* Convert up to 1st invalid byte (or up to end) */
- while ((wc = command_ps[srcpos]) != 0
+ while ((wc = command_ps[srcpos]) != BB_NUL
&& !unicode_is_raw_byte(wc)
) {
srcpos++;
}
- command_ps[srcpos] = 0;
+ 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 == 0) /* usually is */
+ if (wc == BB_NUL) /* usually is */
break;
/* We do have invalid byte here! */
}
/* ~use<tab> - find all users with this prefix */
-static NOINLINE void username_completion(const char *ud)
+static NOINLINE void complete_username(const char *ud)
{
/* Using _r function to avoid pulling in static buffers */
char line_buff[256];
}
endpwent();
}
-#endif /* FEATURE_COMMAND_USERNAME_COMPLETION */
+#endif /* FEATURE_USERNAME_COMPLETION */
enum {
FIND_EXE_ONLY = 0,
return npth;
}
-static void exe_n_cwd_tab_completion(char *command, int type)
+static NOINLINE void complete_cmd_dir_file(char *command, int type)
{
char *path1[1];
char **paths = path1;
free(dirbuf);
}
+/* build_match_prefix:
+ * On entry, matchBuf contains everything up to cursor at the moment <tab>
+ * was pressed. This function looks at it, figures out what part of it
+ * constitutes the command/file/directory prefix to use for completion,
+ * and rewrites matchBuf to contain only that part.
+ */
+/* Helpers: */
/* QUOT is used on elements of int_buf[], which are bytes,
* not Unicode chars. Therefore it works correctly even in Unicode mode.
*/
#define QUOT (UCHAR_MAX+1)
-
#define int_buf (S.find_match__int_buf)
#define pos_buf (S.find_match__pos_buf)
-/* is must be <= in */
-static void collapse_pos(int is, int in)
+static void collapse_pos(int beg, int end)
{
- memmove(int_buf+is, int_buf+in, (MAX_LINELEN+1-in) * sizeof(int_buf[0]));
- memmove(pos_buf+is, pos_buf+in, (MAX_LINELEN+1-in) * sizeof(pos_buf[0]));
+ /* beg must be <= end */
+ memmove(int_buf+beg, int_buf+end, (MAX_LINELEN+1-end) * sizeof(int_buf[0]));
+ memmove(pos_buf+beg, pos_buf+end, (MAX_LINELEN+1-end) * sizeof(pos_buf[0]));
}
-/* On entry, matchBuf contains everything up to cursor at the moment <tab>
- * was pressed. This function looks at it, figures out what part of it
- * constitutes the command/file/directory prefix to use for completion,
- * and rewrites matchBuf to contain only that part.
- */
static NOINLINE int build_match_prefix(char *matchBuf, int *len_with_quotes)
{
int i, j;
/* int16_t int_buf[MAX_LINELEN + 1]; */
/* int16_t pos_buf[MAX_LINELEN + 1]; */
- /* set to integer dimension characters and own positions */
for (i = 0;; i++) {
int_buf[i] = (unsigned char)matchBuf[i];
if (int_buf[i] == 0) {
- pos_buf[i] = -1; /* end-fo-line indicator */
+ pos_buf[i] = -1; /* end-of-line indicator */
break;
}
pos_buf[i] = i;
}
- /* mask \+symbol and convert '\t' to ' ' */
+ /* Mark every \c as "quoted c" */
for (i = j = 0; matchBuf[i]; i++, j++) {
if (matchBuf[i] == '\\') {
collapse_pos(j, j + 1);
i++;
}
}
- /* mask "symbols" or 'symbols' */
+ /* Quote-mark "chars" and 'chars' */
c2 = 0;
for (i = 0; int_buf[i]; i++) {
c = int_buf[i];
int_buf[i] |= QUOT;
}
- /* skip commands with arguments if line has commands delimiters */
- /* ';' ';;' '&' '|' '&&' '||' but '>&' '<&' '>|' */
+ /* Remove everything up to command delimiters:
+ * ';' ';;' '&' '|' '&&' '||',
+ * but careful with '>&' '<&' '>|'
+ */
for (i = 0; int_buf[i]; i++) {
int n;
c = int_buf[i];
}
if (n) {
collapse_pos(0, i + n);
- i = -1; /* hack incremet */
+ i = -1; /* hack increment */
}
}
- /* collapse `command...` */
+ /* Remove all `cmd` */
for (i = 0; int_buf[i]; i++) {
if (int_buf[i] == '`') {
- for (j = i + 1; int_buf[j]; j++)
+ for (j = i + 1; int_buf[j]; j++) {
if (int_buf[j] == '`') {
collapse_pos(i, j + 1);
j = 0;
break;
}
+ }
if (j) {
- /* not found closing ` - command mode, collapse all previous */
+ /* No closing ` - command mode, remove all up to ` */
collapse_pos(0, i + 1);
break;
- } else
- i--; /* hack incremet */
+ }
+ i--; /* hack increment */
}
}
- /* collapse (command...(command...)...) or {command...{command...}...} */
+ /* Remove (command...(command...)...) and {command...{command...}...} */
c = 0; /* "recursive" level */
c2 = 0;
for (i = 0; int_buf[i]; i++) {
else
c2++;
collapse_pos(0, i + 1);
- i = -1; /* hack incremet */
+ i = -1; /* hack increment */
}
}
for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++) {
else
c2--;
collapse_pos(0, i + 1);
- i = -1; /* hack incremet */
+ i = -1; /* hack increment */
}
}
- /* skip first not quote space */
+ /* Remove leading unquoted spaces */
for (i = 0; int_buf[i]; i++)
if (int_buf[i] != ' ')
break;
if (i)
collapse_pos(0, i);
- /* set find mode for completion */
+ /* Determine completion mode */
command_mode = FIND_EXE_ONLY;
for (i = 0; int_buf[i]; i++) {
if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
- if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
+ if (int_buf[i] == ' '
+ && command_mode == FIND_EXE_ONLY
&& matchBuf[pos_buf[0]] == 'c'
&& matchBuf[pos_buf[1]] == 'd'
) {
}
}
}
+
+ /* Remove everything except last word */
for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
continue;
- /* find last word */
for (--i; i >= 0; i--) {
c = int_buf[i];
if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
break;
}
}
- /* skip first not quoted '\'' or '"' */
+ /* Skip all leading unquoted ' or " */
for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++)
continue;
/* collapse quote or unquote // or /~ */
#undef pos_buf
/*
- * display by column (original idea from ls applet,
- * very optimized by me :)
+ * Display by column (original idea from ls applet,
+ * very optimized by me [Vladimir] :)
*/
static void showfiles(void)
{
}
/* Do TAB completion */
-static void input_tab(smallint *lastWasTab)
+static NOINLINE void input_tab(smallint *lastWasTab)
{
if (!(state->flags & TAB_COMPLETION))
return;
int cursor_mb;
#endif
- *lastWasTab = TRUE; /* flop trigger */
+ *lastWasTab = 1;
/* Make a local copy of the string --
* up to the position of the cursor */
#else
{
CHAR_T wc = command_ps[cursor];
- command_ps[cursor] = 0;
+ command_ps[cursor] = BB_NUL;
save_string(matchBuf, MAX_LINELEN);
command_ps[cursor] = wc;
cursor_mb = strlen(matchBuf);
* then try completing this word as a username. */
if (state->flags & USERNAME_COMPLETION)
if (matchBuf[0] == '~' && strchr(matchBuf, '/') == NULL)
- username_completion(matchBuf);
+ complete_username(matchBuf);
#endif
- /* Try to match any executable in our path and everything
- * in the current working directory */
+ /* Try to match a command in $PATH, or a directory, or a file */
if (!matches)
- exe_n_cwd_tab_completion(matchBuf, find_type);
- /* Sort, then remove any duplicates found */
+ complete_cmd_dir_file(matchBuf, find_type);
+ /* Remove duplicates */
if (matches) {
unsigned i;
unsigned n = 0;
qsort_string_vector(matches, num_matches);
for (i = 0; i < num_matches - 1; ++i) {
- if (matches[i] && matches[i+1]) { /* paranoia */
+ //if (matches[i] && matches[i+1]) { /* paranoia */
if (strcmp(matches[i], matches[i+1]) == 0) {
free(matches[i]);
- matches[i] = NULL; /* paranoia */
+ //matches[i] = NULL; /* paranoia */
} else {
matches[n++] = matches[i];
}
- }
+ //}
}
matches[n++] = matches[i];
num_matches = n;
beep();
if (!matches)
return; /* no matches at all */
- /* find minimal match */
+ /* Find common prefix */
tmp1 = xstrdup(matches[0]);
for (tmp = tmp1; *tmp; tmp++) {
for (len_found = 1; len_found < num_matches; len_found++) {
}
}
}
- if (*tmp1 == '\0') { /* have unique pfx? */
+ if (*tmp1 == '\0') { /* have unique prefix? */
free(tmp1); /* no */
return;
}
free(tmp1);
len_found = strlen(tmp);
} else { /* exactly one match */
- tmp = add_quote_for_spec_chars(matches[0]);
- /* for next completion current found */
- *lastWasTab = FALSE;
+ /* Next <tab> is not a double-tab */
+ *lastWasTab = 0;
+ tmp = add_quote_for_spec_chars(matches[0]);
len_found = strlen(tmp);
if (tmp[len_found-1] != '/') {
tmp[len_found] = ' ';
}
}
-#endif /* FEATURE_COMMAND_TAB_COMPLETION */
+#endif /* FEATURE_TAB_COMPLETION */
line_input_t* FAST_FUNC new_line_input_t(int flags)
{
int len;
#if ENABLE_FEATURE_TAB_COMPLETION
- smallint lastWasTab = FALSE;
+ smallint lastWasTab = 0;
#endif
smallint break_out = 0;
#if ENABLE_FEATURE_EDITING_VI
#if ENABLE_FEATURE_TAB_COMPLETION
if (ic_raw != '\t')
- lastWasTab = FALSE;
+ lastWasTab = 0;
#endif
} /* while (1) */
l = read_line_input(prompt, buff);
if (l <= 0 || buff[l-1] != '\n')
break;
- buff[l-1] = 0;
+ buff[l-1] = '\0';
printf("*** read_line_input() returned line =%s=\n", buff);
}
printf("*** read_line_input() detect ^D\n");
projects / platform / upstream / busybox.git / commitdiff