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https://github.com/sheumann/hush.git
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vi-mode changes: eliminate warnings from out-of-range-for-type
case labels that are emitted by gcc4. rearrange macros to eliminate these extra case labels entirely (since the optimizer may no longer do it for us). eliminate static BUFSIZ character deletion buffer -- malloc it, and make it much much smaller.
This commit is contained in:
Paul Fox
parent
dfba741457
commit
0f2dd9f4eb
130
shell/cmdedit.c
130
shell/cmdedit.c
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@ -442,9 +442,10 @@ static void redraw(int y, int back_cursor)
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}
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#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
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static char delbuf[BUFSIZ]; /* a place to store deleted characters */
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static char *delp = delbuf;
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static int newdelflag; /* whether delbuf should be reused yet */
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#define DELBUFSIZ 128
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static char *delbuf; /* a (malloced) place to store deleted characters */
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static char *delp;
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static char newdelflag; /* whether delbuf should be reused yet */
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#endif
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/* Delete the char in front of the cursor, optionally saving it
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@ -459,10 +460,13 @@ static void input_delete(int save)
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#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
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if (save) {
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if (newdelflag) {
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if (!delbuf)
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delbuf = malloc(DELBUFSIZ);
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/* safe if malloc fails */
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delp = delbuf;
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newdelflag = 0;
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}
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if (delp - delbuf < BUFSIZ)
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if (delbuf && (delp - delbuf < DELBUFSIZ))
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*delp++ = command_ps[j];
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}
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#endif
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@ -1370,23 +1374,18 @@ vi_back_motion(char *command)
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#endif
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/*
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* the normal emacs mode and vi's insert mode are the same.
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* commands entered when in vi command mode ("escape mode") get
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* an extra bit added to distinguish them. this lets them share
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* much of the code in the big switch and while loop. i
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* experimented with an ugly macro to make the case labels for
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* these cases go away entirely when vi mode isn't configured, in
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* hopes of letting the jump tables get smaller:
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* #define vcase(caselabel) caselabel
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* and then
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* case CNTRL('A'):
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* case vcase(VICMD('0'):)
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* but it didn't seem to make any difference in code size,
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* and the macro-ized code was too ugly.
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* the emacs and vi modes share much of the code in the big
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* command loop. commands entered when in vi's command mode (aka
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* "escape mode") get an extra bit added to distinguish them --
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* this keeps them from being self-inserted. this clutters the
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* big switch a bit, but keeps all the code in one place.
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*/
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#define VI_cmdbit 0x100
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#define VICMD(somecmd) ((somecmd)|VI_cmdbit)
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#define vbit 0x100
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/* leave out the "vi-mode"-only case labels if vi editing isn't
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* configured. */
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#define vi_case(caselabel) USE_FEATURE_COMMAND_EDITING(caselabel)
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/* convert uppercase ascii to equivalent control char, for readability */
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#define CNTRL(uc_char) ((uc_char) - 0x40)
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@ -1398,8 +1397,9 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
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int break_out = 0;
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int lastWasTab = FALSE;
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unsigned char c;
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unsigned int ic;
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#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
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unsigned int ic, prevc;
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unsigned int prevc;
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int vi_cmdmode = 0;
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#endif
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/* prepare before init handlers */
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@ -1438,38 +1438,37 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
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/* if we can't read input then exit */
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goto prepare_to_die;
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ic = c;
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#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
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newdelflag = 1;
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ic = c;
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if (vi_cmdmode)
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ic |= VI_cmdbit;
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switch (ic)
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#else
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switch (c)
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ic |= vbit;
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#endif
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switch (ic)
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{
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case '\n':
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case '\r':
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case VICMD('\n'):
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case VICMD('\r'):
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vi_case( case '\n'|vbit: )
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vi_case( case '\r'|vbit: )
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/* Enter */
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goto_new_line();
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break_out = 1;
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break;
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case CNTRL('A'):
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case VICMD('0'):
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vi_case( case '0'|vbit: )
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/* Control-a -- Beginning of line */
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input_backward(cursor);
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break;
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case CNTRL('B'):
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case VICMD('h'):
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case VICMD('\b'):
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case VICMD(DEL):
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vi_case( case 'h'|vbit: )
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vi_case( case '\b'|vbit: )
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vi_case( case DEL|vbit: )
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/* Control-b -- Move back one character */
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input_backward(1);
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break;
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case CNTRL('C'):
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case VICMD(CNTRL('C')):
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vi_case( case CNTRL('C')|vbit: )
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/* Control-c -- stop gathering input */
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goto_new_line();
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#ifndef CONFIG_ASH
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@ -1503,13 +1502,13 @@ prepare_to_die:
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}
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break;
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case CNTRL('E'):
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case VICMD('$'):
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vi_case( case '$'|vbit: )
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/* Control-e -- End of line */
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input_end();
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break;
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case CNTRL('F'):
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case VICMD('l'):
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case VICMD(' '):
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vi_case( case 'l'|vbit: )
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vi_case( case ' '|vbit: )
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/* Control-f -- Move forward one character */
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input_forward();
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break;
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@ -1530,22 +1529,22 @@ prepare_to_die:
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printf("\033[J");
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break;
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case CNTRL('L'):
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case VICMD(CNTRL('L')):
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vi_case( case CNTRL('L')|vbit: )
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/* Control-l -- clear screen */
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printf("\033[H");
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redraw(0, len-cursor);
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break;
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#if MAX_HISTORY >= 1
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case CNTRL('N'):
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case VICMD(CNTRL('N')):
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case VICMD('j'):
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vi_case( case CNTRL('N')|vbit: )
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vi_case( case 'j'|vbit: )
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/* Control-n -- Get next command in history */
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if (get_next_history())
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goto rewrite_line;
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break;
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case CNTRL('P'):
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case VICMD(CNTRL('P')):
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case VICMD('k'):
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vi_case( case CNTRL('P')|vbit: )
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vi_case( case 'k'|vbit: )
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/* Control-p -- Get previous command from history */
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if (cur_history > 0) {
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get_previous_history();
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@ -1556,7 +1555,7 @@ prepare_to_die:
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break;
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#endif
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case CNTRL('U'):
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case VICMD(CNTRL('U')):
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vi_case( case CNTRL('U')|vbit: )
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/* Control-U -- Clear line before cursor */
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if (cursor) {
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strcpy(command, command + cursor);
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@ -1564,7 +1563,7 @@ prepare_to_die:
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}
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break;
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case CNTRL('W'):
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case VICMD(CNTRL('W')):
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vi_case( case CNTRL('W')|vbit: )
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/* Control-W -- Remove the last word */
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while (cursor > 0 && isspace(command[cursor-1]))
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input_backspace();
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@ -1572,58 +1571,58 @@ prepare_to_die:
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input_backspace();
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break;
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#if CONFIG_FEATURE_COMMAND_EDITING_VI
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case VICMD('i'):
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case 'i'|vbit:
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vi_cmdmode = 0;
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break;
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case VICMD('I'):
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case 'I'|vbit:
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input_backward(cursor);
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vi_cmdmode = 0;
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break;
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case VICMD('a'):
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case 'a'|vbit:
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input_forward();
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vi_cmdmode = 0;
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break;
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case VICMD('A'):
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case 'A'|vbit:
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input_end();
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vi_cmdmode = 0;
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break;
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case VICMD('x'):
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case 'x'|vbit:
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input_delete(1);
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break;
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case VICMD('X'):
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case 'X'|vbit:
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if (cursor > 0) {
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input_backward(1);
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input_delete(1);
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}
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break;
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case VICMD('W'):
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case 'W'|vbit:
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vi_Word_motion(command, 1);
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break;
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case VICMD('w'):
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case 'w'|vbit:
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vi_word_motion(command, 1);
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break;
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case VICMD('E'):
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case 'E'|vbit:
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vi_End_motion(command);
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break;
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case VICMD('e'):
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case 'e'|vbit:
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vi_end_motion(command);
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break;
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case VICMD('B'):
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case 'B'|vbit:
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vi_Back_motion(command);
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break;
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case VICMD('b'):
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case 'b'|vbit:
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vi_back_motion(command);
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break;
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case VICMD('C'):
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case 'C'|vbit:
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vi_cmdmode = 0;
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/* fall through */
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case VICMD('D'):
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case 'D'|vbit:
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goto clear_to_eol;
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case VICMD('c'):
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case 'c'|vbit:
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vi_cmdmode = 0;
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/* fall through */
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case VICMD('d'):
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case 'd'|vbit:
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{
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int nc, sc;
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sc = cursor;
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@ -1682,13 +1681,13 @@ prepare_to_die:
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}
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}
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break;
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case VICMD('p'):
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case 'p'|vbit:
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input_forward();
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/* fallthrough */
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case VICMD('P'):
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case 'P'|vbit:
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put();
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break;
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case VICMD('r'):
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case 'r'|vbit:
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if (safe_read(0, &c, 1) < 1)
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goto prepare_to_die;
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if (c == 0)
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@ -1700,7 +1699,9 @@ prepare_to_die:
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}
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break;
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#endif /* CONFIG_FEATURE_COMMAND_EDITING_VI */
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case ESC:{
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case ESC:
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#if CONFIG_FEATURE_COMMAND_EDITING_VI
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if (vi_mode) {
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/* ESC: insert mode --> command mode */
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@ -1714,8 +1715,8 @@ prepare_to_die:
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goto prepare_to_die;
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/* different vt100 emulations */
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if (c == '[' || c == 'O') {
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case VICMD('['):
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case VICMD('O'):
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vi_case( case '['|vbit: )
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vi_case( case 'O'|vbit: )
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if (safe_read(0, &c, 1) < 1)
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goto prepare_to_die;
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}
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@ -1787,7 +1788,6 @@ rewrite_line:
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beep();
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}
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break;
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}
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default: /* If it's regular input, do the normal thing */
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#ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
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