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-rw-r--r--shell/cmdedit.c130
1 files changed, 65 insertions, 65 deletions
diff --git a/shell/cmdedit.c b/shell/cmdedit.c
index 31f4c7b20..d0e642250 100644
--- a/shell/cmdedit.c
+++ b/shell/cmdedit.c
@@ -442,9 +442,10 @@ static void redraw(int y, int back_cursor)
}
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
-static char delbuf[BUFSIZ]; /* a place to store deleted characters */
-static char *delp = delbuf;
-static int newdelflag; /* whether delbuf should be reused yet */
+#define DELBUFSIZ 128
+static char *delbuf; /* a (malloced) place to store deleted characters */
+static char *delp;
+static char newdelflag; /* whether delbuf should be reused yet */
#endif
/* Delete the char in front of the cursor, optionally saving it
@@ -459,10 +460,13 @@ static void input_delete(int save)
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
if (save) {
if (newdelflag) {
+ if (!delbuf)
+ delbuf = malloc(DELBUFSIZ);
+ /* safe if malloc fails */
delp = delbuf;
newdelflag = 0;
}
- if (delp - delbuf < BUFSIZ)
+ if (delbuf && (delp - delbuf < DELBUFSIZ))
*delp++ = command_ps[j];
}
#endif
@@ -1370,23 +1374,18 @@ vi_back_motion(char *command)
#endif
/*
- * the normal emacs mode and vi's insert mode are the same.
- * commands entered when in vi command mode ("escape mode") get
- * an extra bit added to distinguish them. this lets them share
- * much of the code in the big switch and while loop. i
- * experimented with an ugly macro to make the case labels for
- * these cases go away entirely when vi mode isn't configured, in
- * hopes of letting the jump tables get smaller:
- * #define vcase(caselabel) caselabel
- * and then
- * case CNTRL('A'):
- * case vcase(VICMD('0'):)
- * but it didn't seem to make any difference in code size,
- * and the macro-ized code was too ugly.
+ * the emacs and vi modes share much of the code in the big
+ * command loop. commands entered when in vi's command mode (aka
+ * "escape mode") get an extra bit added to distinguish them --
+ * this keeps them from being self-inserted. this clutters the
+ * big switch a bit, but keeps all the code in one place.
*/
-#define VI_cmdbit 0x100
-#define VICMD(somecmd) ((somecmd)|VI_cmdbit)
+#define vbit 0x100
+
+/* leave out the "vi-mode"-only case labels if vi editing isn't
+ * configured. */
+#define vi_case(caselabel) USE_FEATURE_COMMAND_EDITING(caselabel)
/* convert uppercase ascii to equivalent control char, for readability */
#define CNTRL(uc_char) ((uc_char) - 0x40)
@@ -1398,8 +1397,9 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
int break_out = 0;
int lastWasTab = FALSE;
unsigned char c;
+ unsigned int ic;
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
- unsigned int ic, prevc;
+ unsigned int prevc;
int vi_cmdmode = 0;
#endif
/* prepare before init handlers */
@@ -1438,38 +1438,37 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
/* if we can't read input then exit */
goto prepare_to_die;
+ ic = c;
+
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
newdelflag = 1;
- ic = c;
if (vi_cmdmode)
- ic |= VI_cmdbit;
- switch (ic)
-#else
- switch (c)
+ ic |= vbit;
#endif
+ switch (ic)
{
case '\n':
case '\r':
- case VICMD('\n'):
- case VICMD('\r'):
+ vi_case( case '\n'|vbit: )
+ vi_case( case '\r'|vbit: )
/* Enter */
goto_new_line();
break_out = 1;
break;
case CNTRL('A'):
- case VICMD('0'):
+ vi_case( case '0'|vbit: )
/* Control-a -- Beginning of line */
input_backward(cursor);
break;
case CNTRL('B'):
- case VICMD('h'):
- case VICMD('\b'):
- case VICMD(DEL):
+ vi_case( case 'h'|vbit: )
+ vi_case( case '\b'|vbit: )
+ vi_case( case DEL|vbit: )
/* Control-b -- Move back one character */
input_backward(1);
break;
case CNTRL('C'):
- case VICMD(CNTRL('C')):
+ vi_case( case CNTRL('C')|vbit: )
/* Control-c -- stop gathering input */
goto_new_line();
#ifndef CONFIG_ASH
@@ -1503,13 +1502,13 @@ prepare_to_die:
}
break;
case CNTRL('E'):
- case VICMD('$'):
+ vi_case( case '$'|vbit: )
/* Control-e -- End of line */
input_end();
break;
case CNTRL('F'):
- case VICMD('l'):
- case VICMD(' '):
+ vi_case( case 'l'|vbit: )
+ vi_case( case ' '|vbit: )
/* Control-f -- Move forward one character */
input_forward();
break;
@@ -1530,22 +1529,22 @@ prepare_to_die:
printf("\033[J");
break;
case CNTRL('L'):
- case VICMD(CNTRL('L')):
+ vi_case( case CNTRL('L')|vbit: )
/* Control-l -- clear screen */
printf("\033[H");
redraw(0, len-cursor);
break;
#if MAX_HISTORY >= 1
case CNTRL('N'):
- case VICMD(CNTRL('N')):
- case VICMD('j'):
+ vi_case( case CNTRL('N')|vbit: )
+ vi_case( case 'j'|vbit: )
/* Control-n -- Get next command in history */
if (get_next_history())
goto rewrite_line;
break;
case CNTRL('P'):
- case VICMD(CNTRL('P')):
- case VICMD('k'):
+ vi_case( case CNTRL('P')|vbit: )
+ vi_case( case 'k'|vbit: )
/* Control-p -- Get previous command from history */
if (cur_history > 0) {
get_previous_history();
@@ -1556,7 +1555,7 @@ prepare_to_die:
break;
#endif
case CNTRL('U'):
- case VICMD(CNTRL('U')):
+ vi_case( case CNTRL('U')|vbit: )
/* Control-U -- Clear line before cursor */
if (cursor) {
strcpy(command, command + cursor);
@@ -1564,7 +1563,7 @@ prepare_to_die:
}
break;
case CNTRL('W'):
- case VICMD(CNTRL('W')):
+ vi_case( case CNTRL('W')|vbit: )
/* Control-W -- Remove the last word */
while (cursor > 0 && isspace(command[cursor-1]))
input_backspace();
@@ -1572,58 +1571,58 @@ prepare_to_die:
input_backspace();
break;
#if CONFIG_FEATURE_COMMAND_EDITING_VI
- case VICMD('i'):
+ case 'i'|vbit:
vi_cmdmode = 0;
break;
- case VICMD('I'):
+ case 'I'|vbit:
input_backward(cursor);
vi_cmdmode = 0;
break;
- case VICMD('a'):
+ case 'a'|vbit:
input_forward();
vi_cmdmode = 0;
break;
- case VICMD('A'):
+ case 'A'|vbit:
input_end();
vi_cmdmode = 0;
break;
- case VICMD('x'):
+ case 'x'|vbit:
input_delete(1);
break;
- case VICMD('X'):
+ case 'X'|vbit:
if (cursor > 0) {
input_backward(1);
input_delete(1);
}
break;
- case VICMD('W'):
+ case 'W'|vbit:
vi_Word_motion(command, 1);
break;
- case VICMD('w'):
+ case 'w'|vbit:
vi_word_motion(command, 1);
break;
- case VICMD('E'):
+ case 'E'|vbit:
vi_End_motion(command);
break;
- case VICMD('e'):
+ case 'e'|vbit:
vi_end_motion(command);
break;
- case VICMD('B'):
+ case 'B'|vbit:
vi_Back_motion(command);
break;
- case VICMD('b'):
+ case 'b'|vbit:
vi_back_motion(command);
break;
- case VICMD('C'):
+ case 'C'|vbit:
vi_cmdmode = 0;
/* fall through */
- case VICMD('D'):
+ case 'D'|vbit:
goto clear_to_eol;
- case VICMD('c'):
+ case 'c'|vbit:
vi_cmdmode = 0;
/* fall through */
- case VICMD('d'):
+ case 'd'|vbit:
{
int nc, sc;
sc = cursor;
@@ -1682,13 +1681,13 @@ prepare_to_die:
}
}
break;
- case VICMD('p'):
+ case 'p'|vbit:
input_forward();
/* fallthrough */
- case VICMD('P'):
+ case 'P'|vbit:
put();
break;
- case VICMD('r'):
+ case 'r'|vbit:
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
if (c == 0)
@@ -1700,7 +1699,9 @@ prepare_to_die:
}
break;
#endif /* CONFIG_FEATURE_COMMAND_EDITING_VI */
- case ESC:{
+
+ case ESC:
+
#if CONFIG_FEATURE_COMMAND_EDITING_VI
if (vi_mode) {
/* ESC: insert mode --> command mode */
@@ -1714,8 +1715,8 @@ prepare_to_die:
goto prepare_to_die;
/* different vt100 emulations */
if (c == '[' || c == 'O') {
- case VICMD('['):
- case VICMD('O'):
+ vi_case( case '['|vbit: )
+ vi_case( case 'O'|vbit: )
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
}
@@ -1787,7 +1788,6 @@ rewrite_line:
beep();
}
break;
- }
default: /* If it's regular input, do the normal thing */
#ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 23:51:12 +0000