[mirror_qemu.git] / readline.c

/*
 * QEMU readline utility
 *
 * Copyright (c) 2003-2004 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu-common.h"
#include "console.h"

#define TERM_CMD_BUF_SIZE 4095
#define TERM_MAX_CMDS 64
#define NB_COMPLETIONS_MAX 256

#define IS_NORM 0
#define IS_ESC  1
#define IS_CSI  2

#define printf do_not_use_printf

static char term_cmd_buf[TERM_CMD_BUF_SIZE + 1];
static int term_cmd_buf_index;
static int term_cmd_buf_size;

static char term_last_cmd_buf[TERM_CMD_BUF_SIZE + 1];
static int term_last_cmd_buf_index;
static int term_last_cmd_buf_size;

static int term_esc_state;
static int term_esc_param;

static char *term_history[TERM_MAX_CMDS];
static int term_hist_entry = -1;

static int nb_completions;
int completion_index;
static char *completions[NB_COMPLETIONS_MAX];

static ReadLineFunc *term_readline_func;
static int term_is_password;
static char term_prompt[256];
static void *term_readline_opaque;

void readline_show_prompt(void)
{
    term_printf("%s", term_prompt);
    term_flush();
    term_last_cmd_buf_index = 0;
    term_last_cmd_buf_size = 0;
    term_esc_state = IS_NORM;
}

/* update the displayed command line */
static void term_update(void)
{
    int i, delta, len;

    if (term_cmd_buf_size != term_last_cmd_buf_size ||
        memcmp(term_cmd_buf, term_last_cmd_buf, term_cmd_buf_size) != 0) {
        for(i = 0; i < term_last_cmd_buf_index; i++) {
            term_printf("\033[D");
        }
        term_cmd_buf[term_cmd_buf_size] = '\0';
        if (term_is_password) {
            len = strlen(term_cmd_buf);
            for(i = 0; i < len; i++)
                term_printf("*");
        } else {
            term_printf("%s", term_cmd_buf);
        }
        term_printf("\033[K");
        memcpy(term_last_cmd_buf, term_cmd_buf, term_cmd_buf_size);
        term_last_cmd_buf_size = term_cmd_buf_size;
        term_last_cmd_buf_index = term_cmd_buf_size;
    }
    if (term_cmd_buf_index != term_last_cmd_buf_index) {
        delta = term_cmd_buf_index - term_last_cmd_buf_index;
        if (delta > 0) {
            for(i = 0;i < delta; i++) {
                term_printf("\033[C");
            }
        } else {
            delta = -delta;
            for(i = 0;i < delta; i++) {
                term_printf("\033[D");
            }
        }
        term_last_cmd_buf_index = term_cmd_buf_index;
    }
    term_flush();
}

static void term_insert_char(int ch)
{
    if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
        memmove(term_cmd_buf + term_cmd_buf_index + 1,
                term_cmd_buf + term_cmd_buf_index,
                term_cmd_buf_size - term_cmd_buf_index);
        term_cmd_buf[term_cmd_buf_index] = ch;
        term_cmd_buf_size++;
        term_cmd_buf_index++;
    }
}

static void term_backward_char(void)
{
    if (term_cmd_buf_index > 0) {
        term_cmd_buf_index--;
    }
}

static void term_forward_char(void)
{
    if (term_cmd_buf_index < term_cmd_buf_size) {
        term_cmd_buf_index++;
    }
}

static void term_delete_char(void)
{
    if (term_cmd_buf_index < term_cmd_buf_size) {
        memmove(term_cmd_buf + term_cmd_buf_index,
                term_cmd_buf + term_cmd_buf_index + 1,
                term_cmd_buf_size - term_cmd_buf_index - 1);
        term_cmd_buf_size--;
    }
}

static void term_backspace(void)
{
    if (term_cmd_buf_index > 0) {
        term_backward_char();
        term_delete_char();
    }
}

static void term_backword(void)
{
    int start;

    if (term_cmd_buf_index == 0 || term_cmd_buf_index > term_cmd_buf_size) {
        return;
    }

    start = term_cmd_buf_index - 1;

    /* find first word (backwards) */
    while (start > 0) {
        if (!qemu_isspace(term_cmd_buf[start])) {
            break;
        }

        --start;
    }

    /* find first space (backwards) */
    while (start > 0) {
        if (qemu_isspace(term_cmd_buf[start])) {
            ++start;
            break;
        }

        --start;
    }

    /* remove word */
    if (start < term_cmd_buf_index) {
        memmove(term_cmd_buf + start,
                term_cmd_buf + term_cmd_buf_index,
                term_cmd_buf_size - term_cmd_buf_index);
        term_cmd_buf_size -= term_cmd_buf_index - start;
        term_cmd_buf_index = start;
    }
}

static void term_bol(void)
{
    term_cmd_buf_index = 0;
}

static void term_eol(void)
{
    term_cmd_buf_index = term_cmd_buf_size;
}

static void term_up_char(void)
{
    int idx;

    if (term_hist_entry == 0)
	return;
    if (term_hist_entry == -1) {
	/* Find latest entry */
	for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	    if (term_history[idx] == NULL)
		break;
	}
	term_hist_entry = idx;
    }
    term_hist_entry--;
    if (term_hist_entry >= 0) {
	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
                term_history[term_hist_entry]);
	term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
    }
}

static void term_down_char(void)
{
    if (term_hist_entry == TERM_MAX_CMDS - 1 || term_hist_entry == -1)
	return;
    if (term_history[++term_hist_entry] != NULL) {
	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
                term_history[term_hist_entry]);
    } else {
	term_hist_entry = -1;
    }
    term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
}

static void term_hist_add(const char *cmdline)
{
    char *hist_entry, *new_entry;
    int idx;

    if (cmdline[0] == '\0')
	return;
    new_entry = NULL;
    if (term_hist_entry != -1) {
	/* We were editing an existing history entry: replace it */
	hist_entry = term_history[term_hist_entry];
	idx = term_hist_entry;
	if (strcmp(hist_entry, cmdline) == 0) {
	    goto same_entry;
	}
    }
    /* Search cmdline in history buffers */
    for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	hist_entry = term_history[idx];
	if (hist_entry == NULL)
	    break;
	if (strcmp(hist_entry, cmdline) == 0) {
	same_entry:
	    new_entry = hist_entry;
	    /* Put this entry at the end of history */
	    memmove(&term_history[idx], &term_history[idx + 1],
		    (TERM_MAX_CMDS - idx + 1) * sizeof(char *));
	    term_history[TERM_MAX_CMDS - 1] = NULL;
	    for (; idx < TERM_MAX_CMDS; idx++) {
		if (term_history[idx] == NULL)
		    break;
	    }
	    break;
	}
    }
    if (idx == TERM_MAX_CMDS) {
	/* Need to get one free slot */
	free(term_history[0]);
	memcpy(term_history, &term_history[1],
	       (TERM_MAX_CMDS - 1) * sizeof(char *));
	term_history[TERM_MAX_CMDS - 1] = NULL;
	idx = TERM_MAX_CMDS - 1;
    }
    if (new_entry == NULL)
	new_entry = strdup(cmdline);
    term_history[idx] = new_entry;
    term_hist_entry = -1;
}

/* completion support */

void add_completion(const char *str)
{
    if (nb_completions < NB_COMPLETIONS_MAX) {
        completions[nb_completions++] = qemu_strdup(str);
    }
}

static void term_completion(void)
{
    int len, i, j, max_width, nb_cols, max_prefix;
    char *cmdline;

    nb_completions = 0;

    cmdline = qemu_malloc(term_cmd_buf_index + 1);
    memcpy(cmdline, term_cmd_buf, term_cmd_buf_index);
    cmdline[term_cmd_buf_index] = '\0';
    readline_find_completion(cmdline);
    qemu_free(cmdline);

    /* no completion found */
    if (nb_completions <= 0)
        return;
    if (nb_completions == 1) {
        len = strlen(completions[0]);
        for(i = completion_index; i < len; i++) {
            term_insert_char(completions[0][i]);
        }
        /* extra space for next argument. XXX: make it more generic */
        if (len > 0 && completions[0][len - 1] != '/')
            term_insert_char(' ');
    } else {
        term_printf("\n");
        max_width = 0;
        max_prefix = 0;	
        for(i = 0; i < nb_completions; i++) {
            len = strlen(completions[i]);
            if (i==0) {
                max_prefix = len;
            } else {
                if (len < max_prefix)
                    max_prefix = len;
                for(j=0; j<max_prefix; j++) {
                    if (completions[i][j] != completions[0][j])
                        max_prefix = j;
                }
            }
            if (len > max_width)
                max_width = len;
        }
        if (max_prefix > 0) 
            for(i = completion_index; i < max_prefix; i++) {
                term_insert_char(completions[0][i]);
            }
        max_width += 2;
        if (max_width < 10)
            max_width = 10;
        else if (max_width > 80)
            max_width = 80;
        nb_cols = 80 / max_width;
        j = 0;
        for(i = 0; i < nb_completions; i++) {
            term_printf("%-*s", max_width, completions[i]);
            if (++j == nb_cols || i == (nb_completions - 1)) {
                term_printf("\n");
                j = 0;
            }
        }
        readline_show_prompt();
    }
}

/* return true if command handled */
void readline_handle_byte(int ch)
{
    switch(term_esc_state) {
    case IS_NORM:
        switch(ch) {
        case 1:
            term_bol();
            break;
        case 4:
            term_delete_char();
            break;
        case 5:
            term_eol();
            break;
        case 9:
            term_completion();
            break;
        case 10:
        case 13:
            term_cmd_buf[term_cmd_buf_size] = '\0';
            if (!term_is_password)
                term_hist_add(term_cmd_buf);
            term_printf("\n");
            term_cmd_buf_index = 0;
            term_cmd_buf_size = 0;
            term_last_cmd_buf_index = 0;
            term_last_cmd_buf_size = 0;
            /* NOTE: readline_start can be called here */
            term_readline_func(term_readline_opaque, term_cmd_buf);
            break;
        case 23:
            /* ^W */
            term_backword();
            break;
        case 27:
            term_esc_state = IS_ESC;
            break;
        case 127:
        case 8:
            term_backspace();
            break;
	case 155:
            term_esc_state = IS_CSI;
	    break;
        default:
            if (ch >= 32) {
                term_insert_char(ch);
            }
            break;
        }
        break;
    case IS_ESC:
        if (ch == '[') {
            term_esc_state = IS_CSI;
            term_esc_param = 0;
        } else {
            term_esc_state = IS_NORM;
        }
        break;
    case IS_CSI:
        switch(ch) {
	case 'A':
	case 'F':
	    term_up_char();
	    break;
	case 'B':
	case 'E':
	    term_down_char();
	    break;
        case 'D':
            term_backward_char();
            break;
        case 'C':
            term_forward_char();
            break;
        case '0' ... '9':
            term_esc_param = term_esc_param * 10 + (ch - '0');
            goto the_end;
        case '~':
            switch(term_esc_param) {
            case 1:
                term_bol();
                break;
            case 3:
                term_delete_char();
                break;
            case 4:
                term_eol();
                break;
            }
            break;
        default:
            break;
        }
        term_esc_state = IS_NORM;
    the_end:
        break;
    }
    term_update();
}

void readline_start(const char *prompt, int is_password,
                    ReadLineFunc *readline_func, void *opaque)
{
    pstrcpy(term_prompt, sizeof(term_prompt), prompt);
    term_readline_func = readline_func;
    term_readline_opaque = opaque;
    term_is_password = is_password;
    term_cmd_buf_index = 0;
    term_cmd_buf_size = 0;
}

const char *readline_get_history(unsigned int index)
{
    if (index >= TERM_MAX_CMDS)
        return NULL;
    return term_history[index];
}
Commit	Line	Data
7e2515e8 FB	1	/*
7e2515e8 FB	2	* QEMU readline utility
5fafdf24	3	*
7e2515e8	4	* Copyright (c) 2003-2004 Fabrice Bellard
5fafdf24	5	*
7e2515e8 FB	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
87ecb68b PB	24	#include "qemu-common.h"
87ecb68b PB	25	#include "console.h"
7e2515e8 FB	26
	27	#define TERM_CMD_BUF_SIZE 4095
	28	#define TERM_MAX_CMDS 64
	29	#define NB_COMPLETIONS_MAX 256
	30
	31	#define IS_NORM 0
	32	#define IS_ESC 1
	33	#define IS_CSI 2
	34
	35	#define printf do_not_use_printf
	36
	37	static char term_cmd_buf[TERM_CMD_BUF_SIZE + 1];
	38	static int term_cmd_buf_index;
	39	static int term_cmd_buf_size;
	40
	41	static char term_last_cmd_buf[TERM_CMD_BUF_SIZE + 1];
	42	static int term_last_cmd_buf_index;
	43	static int term_last_cmd_buf_size;
	44
	45	static int term_esc_state;
	46	static int term_esc_param;
	47
	48	static char *term_history[TERM_MAX_CMDS];
	49	static int term_hist_entry = -1;
	50
	51	static int nb_completions;
	52	int completion_index;
	53	static char *completions[NB_COMPLETIONS_MAX];
	54
	55	static ReadLineFunc *term_readline_func;
	56	static int term_is_password;
	57	static char term_prompt[256];
	58	static void *term_readline_opaque;
	59
9dd442b1	60	void readline_show_prompt(void)
7e2515e8 FB	61	{
	62	term_printf("%s", term_prompt);
	63	term_flush();
	64	term_last_cmd_buf_index = 0;
	65	term_last_cmd_buf_size = 0;
	66	term_esc_state = IS_NORM;
	67	}
	68
7e2515e8 FB	69	/* update the displayed command line */
	70	static void term_update(void)
	71	{
	72	int i, delta, len;
	73
	74	if (term_cmd_buf_size != term_last_cmd_buf_size \|\|
	75	memcmp(term_cmd_buf, term_last_cmd_buf, term_cmd_buf_size) != 0) {
	76	for(i = 0; i < term_last_cmd_buf_index; i++) {
	77	term_printf("\033[D");
	78	}
	79	term_cmd_buf[term_cmd_buf_size] = '\0';
	80	if (term_is_password) {
	81	len = strlen(term_cmd_buf);
	82	for(i = 0; i < len; i++)
	83	term_printf("*");
	84	} else {
	85	term_printf("%s", term_cmd_buf);
	86	}
	87	term_printf("\033[K");
	88	memcpy(term_last_cmd_buf, term_cmd_buf, term_cmd_buf_size);
	89	term_last_cmd_buf_size = term_cmd_buf_size;
	90	term_last_cmd_buf_index = term_cmd_buf_size;
	91	}
	92	if (term_cmd_buf_index != term_last_cmd_buf_index) {
	93	delta = term_cmd_buf_index - term_last_cmd_buf_index;
	94	if (delta > 0) {
	95	for(i = 0;i < delta; i++) {
	96	term_printf("\033[C");
	97	}
	98	} else {
	99	delta = -delta;
	100	for(i = 0;i < delta; i++) {
	101	term_printf("\033[D");
	102	}
	103	}
	104	term_last_cmd_buf_index = term_cmd_buf_index;
	105	}
	106	term_flush();
	107	}
	108
	109	static void term_insert_char(int ch)
	110	{
	111	if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
	112	memmove(term_cmd_buf + term_cmd_buf_index + 1,
	113	term_cmd_buf + term_cmd_buf_index,
	114	term_cmd_buf_size - term_cmd_buf_index);
	115	term_cmd_buf[term_cmd_buf_index] = ch;
	116	term_cmd_buf_size++;
	117	term_cmd_buf_index++;
	118	}
	119	}
	120
	121	static void term_backward_char(void)
	122	{
	123	if (term_cmd_buf_index > 0) {
	124	term_cmd_buf_index--;
	125	}
	126	}
	127
	128	static void term_forward_char(void)
	129	{
	130	if (term_cmd_buf_index < term_cmd_buf_size) {
	131	term_cmd_buf_index++;
	132	}
133	}
134
135	static void term_delete_char(void)
136	{
137	if (term_cmd_buf_index < term_cmd_buf_size) {
138	memmove(term_cmd_buf + term_cmd_buf_index,
139	term_cmd_buf + term_cmd_buf_index + 1,
140	term_cmd_buf_size - term_cmd_buf_index - 1);
141	term_cmd_buf_size--;
142	}
143	}
144
145	static void term_backspace(void)
146	{
147	if (term_cmd_buf_index > 0) {
148	term_backward_char();
149	term_delete_char();
150	}
151	}
152
33fa11d4 TS	153	static void term_backword(void)
	154	{
	155	int start;
	156
	157	if (term_cmd_buf_index == 0 \|\| term_cmd_buf_index > term_cmd_buf_size) {
	158	return;
	159	}
	160
	161	start = term_cmd_buf_index - 1;
	162
	163	/* find first word (backwards) */
	164	while (start > 0) {
cd390083	165	if (!qemu_isspace(term_cmd_buf[start])) {
33fa11d4 TS	166	break;
	167	}
	168
	169	--start;
	170	}
	171
	172	/* find first space (backwards) */
	173	while (start > 0) {
cd390083	174	if (qemu_isspace(term_cmd_buf[start])) {
33fa11d4 TS	175	++start;
	176	break;
	177	}
	178
	179	--start;
	180	}
	181
	182	/* remove word */
	183	if (start < term_cmd_buf_index) {
	184	memmove(term_cmd_buf + start,
	185	term_cmd_buf + term_cmd_buf_index,
	186	term_cmd_buf_size - term_cmd_buf_index);
	187	term_cmd_buf_size -= term_cmd_buf_index - start;
	188	term_cmd_buf_index = start;
	189	}
	190	}
	191
7e2515e8 FB	192	static void term_bol(void)
	193	{
	194	term_cmd_buf_index = 0;
	195	}
	196
	197	static void term_eol(void)
	198	{
	199	term_cmd_buf_index = term_cmd_buf_size;
	200	}
	201
	202	static void term_up_char(void)
	203	{
	204	int idx;
	205
	206	if (term_hist_entry == 0)
	207	return;
	208	if (term_hist_entry == -1) {
	209	/* Find latest entry */
	210	for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	211	if (term_history[idx] == NULL)
	212	break;
	213	}
	214	term_hist_entry = idx;
	215	}
	216	term_hist_entry--;
	217	if (term_hist_entry >= 0) {
5fafdf24	218	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
7e2515e8 FB	219	term_history[term_hist_entry]);
	220	term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
	221	}
	222	}
	223
	224	static void term_down_char(void)
	225	{
	226	if (term_hist_entry == TERM_MAX_CMDS - 1 \|\| term_hist_entry == -1)
	227	return;
	228	if (term_history[++term_hist_entry] != NULL) {
	229	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
	230	term_history[term_hist_entry]);
	231	} else {
	232	term_hist_entry = -1;
	233	}
	234	term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
	235	}
	236
	237	static void term_hist_add(const char *cmdline)
	238	{
	239	char hist_entry, new_entry;
	240	int idx;
	241
	242	if (cmdline[0] == '\0')
	243	return;
	244	new_entry = NULL;
	245	if (term_hist_entry != -1) {
	246	/* We were editing an existing history entry: replace it */
	247	hist_entry = term_history[term_hist_entry];
	248	idx = term_hist_entry;
	249	if (strcmp(hist_entry, cmdline) == 0) {
	250	goto same_entry;
	251	}
	252	}
	253	/* Search cmdline in history buffers */
	254	for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	255	hist_entry = term_history[idx];
	256	if (hist_entry == NULL)
	257	break;
	258	if (strcmp(hist_entry, cmdline) == 0) {
	259	same_entry:
	260	new_entry = hist_entry;
	261	/* Put this entry at the end of history */
	262	memmove(&term_history[idx], &term_history[idx + 1],
ccf7aa52	263	(TERM_MAX_CMDS - idx + 1) * sizeof(char *));
7e2515e8 FB	264	term_history[TERM_MAX_CMDS - 1] = NULL;
	265	for (; idx < TERM_MAX_CMDS; idx++) {
	266	if (term_history[idx] == NULL)
	267	break;
	268	}
	269	break;
	270	}
	271	}
	272	if (idx == TERM_MAX_CMDS) {
	273	/* Need to get one free slot */
	274	free(term_history[0]);
	275	memcpy(term_history, &term_history[1],
ccf7aa52	276	(TERM_MAX_CMDS - 1) * sizeof(char *));
7e2515e8 FB	277	term_history[TERM_MAX_CMDS - 1] = NULL;
	278	idx = TERM_MAX_CMDS - 1;
	279	}
	280	if (new_entry == NULL)
	281	new_entry = strdup(cmdline);
	282	term_history[idx] = new_entry;
	283	term_hist_entry = -1;
	284	}
	285
	286	/* completion support */
	287
	288	void add_completion(const char *str)
	289	{
	290	if (nb_completions < NB_COMPLETIONS_MAX) {
	291	completions[nb_completions++] = qemu_strdup(str);
	292	}
	293	}
	294
	295	static void term_completion(void)
	296	{
b427c726	297	int len, i, j, max_width, nb_cols, max_prefix;
7e2515e8 FB	298	char *cmdline;
	299
	300	nb_completions = 0;
3b46e624	301
7e2515e8	302	cmdline = qemu_malloc(term_cmd_buf_index + 1);
7e2515e8 FB	303	memcpy(cmdline, term_cmd_buf, term_cmd_buf_index);
	304	cmdline[term_cmd_buf_index] = '\0';
	305	readline_find_completion(cmdline);
	306	qemu_free(cmdline);
	307
	308	/* no completion found */
	309	if (nb_completions <= 0)
	310	return;
	311	if (nb_completions == 1) {
	312	len = strlen(completions[0]);
	313	for(i = completion_index; i < len; i++) {
	314	term_insert_char(completions[0][i]);
	315	}
	316	/* extra space for next argument. XXX: make it more generic */
	317	if (len > 0 && completions[0][len - 1] != '/')
	318	term_insert_char(' ');
	319	} else {
	320	term_printf("\n");
	321	max_width = 0;
b427c726	322	max_prefix = 0;
7e2515e8 FB	323	for(i = 0; i < nb_completions; i++) {
7e2515e8 FB	324	len = strlen(completions[i]);
b427c726 TS	325	if (i==0) {
	326	max_prefix = len;
	327	} else {
	328	if (len < max_prefix)
	329	max_prefix = len;
	330	for(j=0; j<max_prefix; j++) {
	331	if (completions[i][j] != completions[0][j])
	332	max_prefix = j;
	333	}
	334	}
7e2515e8 FB	335	if (len > max_width)
	336	max_width = len;
	337	}
b427c726 TS	338	if (max_prefix > 0)
	339	for(i = completion_index; i < max_prefix; i++) {
	340	term_insert_char(completions[0][i]);
	341	}
7e2515e8 FB	342	max_width += 2;
	343	if (max_width < 10)
	344	max_width = 10;
	345	else if (max_width > 80)
	346	max_width = 80;
	347	nb_cols = 80 / max_width;
	348	j = 0;
	349	for(i = 0; i < nb_completions; i++) {
	350	term_printf("%-*s", max_width, completions[i]);
	351	if (++j == nb_cols \|\| i == (nb_completions - 1)) {
	352	term_printf("\n");
	353	j = 0;
	354	}
	355	}
9dd442b1	356	readline_show_prompt();
7e2515e8 FB	357	}
	358	}
	359
	360	/* return true if command handled */
	361	void readline_handle_byte(int ch)
	362	{
	363	switch(term_esc_state) {
	364	case IS_NORM:
	365	switch(ch) {
	366	case 1:
	367	term_bol();
	368	break;
	369	case 4:
	370	term_delete_char();
	371	break;
	372	case 5:
	373	term_eol();
	374	break;
	375	case 9:
	376	term_completion();
	377	break;
	378	case 10:
	379	case 13:
	380	term_cmd_buf[term_cmd_buf_size] = '\0';
	381	if (!term_is_password)
	382	term_hist_add(term_cmd_buf);
	383	term_printf("\n");
c92843b5 TS	384	term_cmd_buf_index = 0;
	385	term_cmd_buf_size = 0;
	386	term_last_cmd_buf_index = 0;
	387	term_last_cmd_buf_size = 0;
7e2515e8 FB	388	/* NOTE: readline_start can be called here */
	389	term_readline_func(term_readline_opaque, term_cmd_buf);
	390	break;
33fa11d4 TS	391	case 23:
	392	/* ^W */
	393	term_backword();
	394	break;
7e2515e8 FB	395	case 27:
	396	term_esc_state = IS_ESC;
	397	break;
	398	case 127:
	399	case 8:
	400	term_backspace();
	401	break;
	402	case 155:
	403	term_esc_state = IS_CSI;
	404	break;
	405	default:
	406	if (ch >= 32) {
	407	term_insert_char(ch);
	408	}
	409	break;
	410	}
	411	break;
	412	case IS_ESC:
	413	if (ch == '[') {
	414	term_esc_state = IS_CSI;
	415	term_esc_param = 0;
	416	} else {
	417	term_esc_state = IS_NORM;
	418	}
	419	break;
	420	case IS_CSI:
	421	switch(ch) {
	422	case 'A':
	423	case 'F':
	424	term_up_char();
	425	break;
	426	case 'B':
	427	case 'E':
	428	term_down_char();
	429	break;
	430	case 'D':
	431	term_backward_char();
	432	break;
	433	case 'C':
	434	term_forward_char();
	435	break;
	436	case '0' ... '9':
	437	term_esc_param = term_esc_param * 10 + (ch - '0');
	438	goto the_end;
	439	case '~':
	440	switch(term_esc_param) {
	441	case 1:
	442	term_bol();
	443	break;
	444	case 3:
	445	term_delete_char();
	446	break;
	447	case 4:
	448	term_eol();
	449	break;
	450	}
	451	break;
	452	default:
	453	break;
	454	}
	455	term_esc_state = IS_NORM;
	456	the_end:
	457	break;
	458	}
459	term_update();
460	}
461
462	void readline_start(const char *prompt, int is_password,
463	ReadLineFunc readline_func, void opaque)
464	{
465	pstrcpy(term_prompt, sizeof(term_prompt), prompt);
466	term_readline_func = readline_func;
467	term_readline_opaque = opaque;
468	term_is_password = is_password;
9dd442b1 AL	469	term_cmd_buf_index = 0;
9dd442b1 AL	470	term_cmd_buf_size = 0;
7e2515e8 FB	471	}
	472
	473	const char *readline_get_history(unsigned int index)
	474	{
	475	if (index >= TERM_MAX_CMDS)
	476	return NULL;
	477	return term_history[index];
	478	}