[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;

static void term_show_prompt2(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;
}

static void term_show_prompt(void)
{
    term_show_prompt2();
    term_cmd_buf_index = 0;
    term_cmd_buf_size = 0;
}

/* 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);
    if (!cmdline)
        return;
    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;
            }
        }
        term_show_prompt2();
    }
}

/* 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_show_prompt();
}

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
	60	static void term_show_prompt2(void)
	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
	69	static void term_show_prompt(void)
	70	{
	71	term_show_prompt2();
	72	term_cmd_buf_index = 0;
	73	term_cmd_buf_size = 0;
	74	}
	75
	76	/* update the displayed command line */
	77	static void term_update(void)
	78	{
	79	int i, delta, len;
	80
	81	if (term_cmd_buf_size != term_last_cmd_buf_size \|\|
	82	memcmp(term_cmd_buf, term_last_cmd_buf, term_cmd_buf_size) != 0) {
	83	for(i = 0; i < term_last_cmd_buf_index; i++) {
	84	term_printf("\033[D");
	85	}
	86	term_cmd_buf[term_cmd_buf_size] = '\0';
	87	if (term_is_password) {
	88	len = strlen(term_cmd_buf);
	89	for(i = 0; i < len; i++)
90	term_printf("*");
91	} else {
92	term_printf("%s", term_cmd_buf);
93	}
94	term_printf("\033[K");
95	memcpy(term_last_cmd_buf, term_cmd_buf, term_cmd_buf_size);
96	term_last_cmd_buf_size = term_cmd_buf_size;
97	term_last_cmd_buf_index = term_cmd_buf_size;
98	}
99	if (term_cmd_buf_index != term_last_cmd_buf_index) {
100	delta = term_cmd_buf_index - term_last_cmd_buf_index;
101	if (delta > 0) {
102	for(i = 0;i < delta; i++) {
103	term_printf("\033[C");
104	}
105	} else {
106	delta = -delta;
107	for(i = 0;i < delta; i++) {
108	term_printf("\033[D");
109	}
110	}
111	term_last_cmd_buf_index = term_cmd_buf_index;
112	}
113	term_flush();
114	}
115
116	static void term_insert_char(int ch)
117	{
118	if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
119	memmove(term_cmd_buf + term_cmd_buf_index + 1,
120	term_cmd_buf + term_cmd_buf_index,
121	term_cmd_buf_size - term_cmd_buf_index);
122	term_cmd_buf[term_cmd_buf_index] = ch;
123	term_cmd_buf_size++;
124	term_cmd_buf_index++;
125	}
126	}
127
128	static void term_backward_char(void)
129	{
130	if (term_cmd_buf_index > 0) {
131	term_cmd_buf_index--;
132	}
133	}
134
135	static void term_forward_char(void)
136	{
137	if (term_cmd_buf_index < term_cmd_buf_size) {
138	term_cmd_buf_index++;
139	}
140	}
141
142	static void term_delete_char(void)
143	{
144	if (term_cmd_buf_index < term_cmd_buf_size) {
145	memmove(term_cmd_buf + term_cmd_buf_index,
146	term_cmd_buf + term_cmd_buf_index + 1,
147	term_cmd_buf_size - term_cmd_buf_index - 1);
148	term_cmd_buf_size--;
149	}
150	}
151
152	static void term_backspace(void)
153	{
154	if (term_cmd_buf_index > 0) {
155	term_backward_char();
156	term_delete_char();
157	}
158	}
159
33fa11d4 TS	160	static void term_backword(void)
	161	{
	162	int start;
	163
	164	if (term_cmd_buf_index == 0 \|\| term_cmd_buf_index > term_cmd_buf_size) {
	165	return;
	166	}
	167
	168	start = term_cmd_buf_index - 1;
	169
	170	/* find first word (backwards) */
	171	while (start > 0) {
cd390083	172	if (!qemu_isspace(term_cmd_buf[start])) {
33fa11d4 TS	173	break;
	174	}
	175
	176	--start;
	177	}
	178
	179	/* find first space (backwards) */
	180	while (start > 0) {
cd390083	181	if (qemu_isspace(term_cmd_buf[start])) {
33fa11d4 TS	182	++start;
	183	break;
	184	}
	185
	186	--start;
	187	}
	188
	189	/* remove word */
	190	if (start < term_cmd_buf_index) {
	191	memmove(term_cmd_buf + start,
	192	term_cmd_buf + term_cmd_buf_index,
	193	term_cmd_buf_size - term_cmd_buf_index);
	194	term_cmd_buf_size -= term_cmd_buf_index - start;
	195	term_cmd_buf_index = start;
	196	}
	197	}
	198
7e2515e8 FB	199	static void term_bol(void)
	200	{
	201	term_cmd_buf_index = 0;
	202	}
	203
	204	static void term_eol(void)
	205	{
	206	term_cmd_buf_index = term_cmd_buf_size;
	207	}
	208
	209	static void term_up_char(void)
	210	{
	211	int idx;
	212
	213	if (term_hist_entry == 0)
	214	return;
	215	if (term_hist_entry == -1) {
	216	/* Find latest entry */
	217	for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	218	if (term_history[idx] == NULL)
	219	break;
	220	}
	221	term_hist_entry = idx;
	222	}
	223	term_hist_entry--;
	224	if (term_hist_entry >= 0) {
5fafdf24	225	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
7e2515e8 FB	226	term_history[term_hist_entry]);
	227	term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
	228	}
	229	}
	230
	231	static void term_down_char(void)
	232	{
	233	if (term_hist_entry == TERM_MAX_CMDS - 1 \|\| term_hist_entry == -1)
	234	return;
	235	if (term_history[++term_hist_entry] != NULL) {
	236	pstrcpy(term_cmd_buf, sizeof(term_cmd_buf),
	237	term_history[term_hist_entry]);
	238	} else {
	239	term_hist_entry = -1;
	240	}
	241	term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
	242	}
	243
	244	static void term_hist_add(const char *cmdline)
	245	{
	246	char hist_entry, new_entry;
	247	int idx;
	248
	249	if (cmdline[0] == '\0')
	250	return;
	251	new_entry = NULL;
	252	if (term_hist_entry != -1) {
	253	/* We were editing an existing history entry: replace it */
	254	hist_entry = term_history[term_hist_entry];
	255	idx = term_hist_entry;
	256	if (strcmp(hist_entry, cmdline) == 0) {
	257	goto same_entry;
	258	}
	259	}
	260	/* Search cmdline in history buffers */
	261	for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
	262	hist_entry = term_history[idx];
	263	if (hist_entry == NULL)
	264	break;
	265	if (strcmp(hist_entry, cmdline) == 0) {
	266	same_entry:
	267	new_entry = hist_entry;
	268	/* Put this entry at the end of history */
	269	memmove(&term_history[idx], &term_history[idx + 1],
ccf7aa52	270	(TERM_MAX_CMDS - idx + 1) * sizeof(char *));
7e2515e8 FB	271	term_history[TERM_MAX_CMDS - 1] = NULL;
	272	for (; idx < TERM_MAX_CMDS; idx++) {
	273	if (term_history[idx] == NULL)
	274	break;
	275	}
	276	break;
	277	}
	278	}
	279	if (idx == TERM_MAX_CMDS) {
	280	/* Need to get one free slot */
	281	free(term_history[0]);
	282	memcpy(term_history, &term_history[1],
ccf7aa52	283	(TERM_MAX_CMDS - 1) * sizeof(char *));
7e2515e8 FB	284	term_history[TERM_MAX_CMDS - 1] = NULL;
	285	idx = TERM_MAX_CMDS - 1;
	286	}
	287	if (new_entry == NULL)
	288	new_entry = strdup(cmdline);
	289	term_history[idx] = new_entry;
	290	term_hist_entry = -1;
	291	}
	292
	293	/* completion support */
	294
	295	void add_completion(const char *str)
	296	{
	297	if (nb_completions < NB_COMPLETIONS_MAX) {
	298	completions[nb_completions++] = qemu_strdup(str);
	299	}
	300	}
	301
	302	static void term_completion(void)
	303	{
b427c726	304	int len, i, j, max_width, nb_cols, max_prefix;
7e2515e8 FB	305	char *cmdline;
	306
	307	nb_completions = 0;
3b46e624	308
7e2515e8 FB	309	cmdline = qemu_malloc(term_cmd_buf_index + 1);
	310	if (!cmdline)
	311	return;
	312	memcpy(cmdline, term_cmd_buf, term_cmd_buf_index);
	313	cmdline[term_cmd_buf_index] = '\0';
	314	readline_find_completion(cmdline);
	315	qemu_free(cmdline);
	316
	317	/* no completion found */
	318	if (nb_completions <= 0)
	319	return;
	320	if (nb_completions == 1) {
	321	len = strlen(completions[0]);
	322	for(i = completion_index; i < len; i++) {
	323	term_insert_char(completions[0][i]);
	324	}
	325	/* extra space for next argument. XXX: make it more generic */
	326	if (len > 0 && completions[0][len - 1] != '/')
	327	term_insert_char(' ');
	328	} else {
	329	term_printf("\n");
	330	max_width = 0;
b427c726	331	max_prefix = 0;
7e2515e8 FB	332	for(i = 0; i < nb_completions; i++) {
7e2515e8 FB	333	len = strlen(completions[i]);
b427c726 TS	334	if (i==0) {
	335	max_prefix = len;
	336	} else {
	337	if (len < max_prefix)
	338	max_prefix = len;
	339	for(j=0; j<max_prefix; j++) {
	340	if (completions[i][j] != completions[0][j])
	341	max_prefix = j;
	342	}
	343	}
7e2515e8 FB	344	if (len > max_width)
	345	max_width = len;
	346	}
b427c726 TS	347	if (max_prefix > 0)
	348	for(i = completion_index; i < max_prefix; i++) {
	349	term_insert_char(completions[0][i]);
	350	}
7e2515e8 FB	351	max_width += 2;
	352	if (max_width < 10)
	353	max_width = 10;
	354	else if (max_width > 80)
	355	max_width = 80;
	356	nb_cols = 80 / max_width;
	357	j = 0;
	358	for(i = 0; i < nb_completions; i++) {
	359	term_printf("%-*s", max_width, completions[i]);
	360	if (++j == nb_cols \|\| i == (nb_completions - 1)) {
	361	term_printf("\n");
	362	j = 0;
	363	}
	364	}
	365	term_show_prompt2();
	366	}
	367	}
	368
	369	/* return true if command handled */
	370	void readline_handle_byte(int ch)
	371	{
	372	switch(term_esc_state) {
	373	case IS_NORM:
	374	switch(ch) {
	375	case 1:
	376	term_bol();
	377	break;
	378	case 4:
	379	term_delete_char();
	380	break;
	381	case 5:
	382	term_eol();
	383	break;
	384	case 9:
	385	term_completion();
	386	break;
	387	case 10:
	388	case 13:
	389	term_cmd_buf[term_cmd_buf_size] = '\0';
	390	if (!term_is_password)
	391	term_hist_add(term_cmd_buf);
	392	term_printf("\n");
c92843b5 TS	393	term_cmd_buf_index = 0;
	394	term_cmd_buf_size = 0;
	395	term_last_cmd_buf_index = 0;
	396	term_last_cmd_buf_size = 0;
7e2515e8 FB	397	/* NOTE: readline_start can be called here */
	398	term_readline_func(term_readline_opaque, term_cmd_buf);
	399	break;
33fa11d4 TS	400	case 23:
	401	/* ^W */
	402	term_backword();
	403	break;
7e2515e8 FB	404	case 27:
	405	term_esc_state = IS_ESC;
	406	break;
	407	case 127:
	408	case 8:
	409	term_backspace();
	410	break;
	411	case 155:
	412	term_esc_state = IS_CSI;
	413	break;
	414	default:
	415	if (ch >= 32) {
	416	term_insert_char(ch);
	417	}
	418	break;
	419	}
	420	break;
	421	case IS_ESC:
	422	if (ch == '[') {
	423	term_esc_state = IS_CSI;
	424	term_esc_param = 0;
	425	} else {
	426	term_esc_state = IS_NORM;
	427	}
	428	break;
	429	case IS_CSI:
	430	switch(ch) {
	431	case 'A':
	432	case 'F':
	433	term_up_char();
	434	break;
	435	case 'B':
	436	case 'E':
	437	term_down_char();
	438	break;
	439	case 'D':
	440	term_backward_char();
	441	break;
	442	case 'C':
	443	term_forward_char();
	444	break;
	445	case '0' ... '9':
	446	term_esc_param = term_esc_param * 10 + (ch - '0');
	447	goto the_end;
	448	case '~':
	449	switch(term_esc_param) {
	450	case 1:
	451	term_bol();
	452	break;
	453	case 3:
	454	term_delete_char();
	455	break;
	456	case 4:
	457	term_eol();
	458	break;
	459	}
	460	break;
	461	default:
	462	break;
	463	}
	464	term_esc_state = IS_NORM;
	465	the_end:
	466	break;
	467	}
468	term_update();
469	}
470
471	void readline_start(const char *prompt, int is_password,
472	ReadLineFunc readline_func, void opaque)
473	{
474	pstrcpy(term_prompt, sizeof(term_prompt), prompt);
475	term_readline_func = readline_func;
476	term_readline_opaque = opaque;
477	term_is_password = is_password;
478	term_show_prompt();
479	}
480
481	const char *readline_get_history(unsigned int index)
482	{
483	if (index >= TERM_MAX_CMDS)
484	return NULL;
485	return term_history[index];
486	}
487
488