[PULL,14/42] readline: move readline to a generic location

diff --git a/Makefile.objs b/Makefile.objs
index 857bb53..ac1d0e1 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -43,7 +43,6 @@  libcacard-y += libcacard/vcardt.o
 ifeq ($(CONFIG_SOFTMMU),y)
 common-obj-y = $(block-obj-y) blockdev.o blockdev-nbd.o block/
 common-obj-y += net/
-common-obj-y += readline.o
 common-obj-y += qdev-monitor.o device-hotplug.o
 common-obj-$(CONFIG_WIN32) += os-win32.o
 common-obj-$(CONFIG_POSIX) += os-posix.o
diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 22d8b8f..7e5f752 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -5,7 +5,7 @@ 
 #include "qapi/qmp/qerror.h"
 #include "qapi/qmp/qdict.h"
 #include "block/block.h"
-#include "monitor/readline.h"
+#include "qemu/readline.h"
 
 extern Monitor *cur_mon;
 extern Monitor *default_mon;
diff --git a/include/monitor/readline.h b/include/monitor/readline.h
deleted file mode 100644
index a89fe4a..0000000
--- a/include/monitor/readline.h
+++ /dev/null
@@ -1,62 +0,0 @@ 
-#ifndef READLINE_H
-#define READLINE_H
-
-#define READLINE_CMD_BUF_SIZE 4095
-#define READLINE_MAX_CMDS 64
-#define READLINE_MAX_COMPLETIONS 256
-
-typedef void ReadLinePrintfFunc(void *opaque, const char *fmt, ...);
-typedef void ReadLineFlushFunc(void *opaque);
-typedef void ReadLineFunc(void *opaque, const char *str,
-                          void *readline_opaque);
-typedef void ReadLineCompletionFunc(void *opaque,
-                                    const char *cmdline);
-
-typedef struct ReadLineState {
-    char cmd_buf[READLINE_CMD_BUF_SIZE + 1];
-    int cmd_buf_index;
-    int cmd_buf_size;
-
-    char last_cmd_buf[READLINE_CMD_BUF_SIZE + 1];
-    int last_cmd_buf_index;
-    int last_cmd_buf_size;
-
-    int esc_state;
-    int esc_param;
-
-    char *history[READLINE_MAX_CMDS];
-    int hist_entry;
-
-    ReadLineCompletionFunc *completion_finder;
-    char *completions[READLINE_MAX_COMPLETIONS];
-    int nb_completions;
-    int completion_index;
-
-    ReadLineFunc *readline_func;
-    void *readline_opaque;
-    int read_password;
-    char prompt[256];
-
-    ReadLinePrintfFunc *printf_func;
-    ReadLineFlushFunc *flush_func;
-    void *opaque;
-} ReadLineState;
-
-void readline_add_completion(ReadLineState *rs, const char *str);
-void readline_set_completion_index(ReadLineState *rs, int completion_index);
-
-const char *readline_get_history(ReadLineState *rs, unsigned int index);
-
-void readline_handle_byte(ReadLineState *rs, int ch);
-
-void readline_start(ReadLineState *rs, const char *prompt, int read_password,
-                    ReadLineFunc *readline_func, void *readline_opaque);
-void readline_restart(ReadLineState *rs);
-void readline_show_prompt(ReadLineState *rs);
-
-ReadLineState *readline_init(ReadLinePrintfFunc *printf_func,
-                             ReadLineFlushFunc *flush_func,
-                             void *opaque,
-                             ReadLineCompletionFunc *completion_finder);
-
-#endif /* !READLINE_H */
diff --git a/include/qemu/readline.h b/include/qemu/readline.h
new file mode 100644
index 0000000..a89fe4a
--- /dev/null
+++ b/include/qemu/readline.h
@@ -0,0 +1,62 @@ 
+#ifndef READLINE_H
+#define READLINE_H
+
+#define READLINE_CMD_BUF_SIZE 4095
+#define READLINE_MAX_CMDS 64
+#define READLINE_MAX_COMPLETIONS 256
+
+typedef void ReadLinePrintfFunc(void *opaque, const char *fmt, ...);
+typedef void ReadLineFlushFunc(void *opaque);
+typedef void ReadLineFunc(void *opaque, const char *str,
+                          void *readline_opaque);
+typedef void ReadLineCompletionFunc(void *opaque,
+                                    const char *cmdline);
+
+typedef struct ReadLineState {
+    char cmd_buf[READLINE_CMD_BUF_SIZE + 1];
+    int cmd_buf_index;
+    int cmd_buf_size;
+
+    char last_cmd_buf[READLINE_CMD_BUF_SIZE + 1];
+    int last_cmd_buf_index;
+    int last_cmd_buf_size;
+
+    int esc_state;
+    int esc_param;
+
+    char *history[READLINE_MAX_CMDS];
+    int hist_entry;
+
+    ReadLineCompletionFunc *completion_finder;
+    char *completions[READLINE_MAX_COMPLETIONS];
+    int nb_completions;
+    int completion_index;
+
+    ReadLineFunc *readline_func;
+    void *readline_opaque;
+    int read_password;
+    char prompt[256];
+
+    ReadLinePrintfFunc *printf_func;
+    ReadLineFlushFunc *flush_func;
+    void *opaque;
+} ReadLineState;
+
+void readline_add_completion(ReadLineState *rs, const char *str);
+void readline_set_completion_index(ReadLineState *rs, int completion_index);
+
+const char *readline_get_history(ReadLineState *rs, unsigned int index);
+
+void readline_handle_byte(ReadLineState *rs, int ch);
+
+void readline_start(ReadLineState *rs, const char *prompt, int read_password,
+                    ReadLineFunc *readline_func, void *readline_opaque);
+void readline_restart(ReadLineState *rs);
+void readline_show_prompt(ReadLineState *rs);
+
+ReadLineState *readline_init(ReadLinePrintfFunc *printf_func,
+                             ReadLineFlushFunc *flush_func,
+                             void *opaque,
+                             ReadLineCompletionFunc *completion_finder);
+
+#endif /* !READLINE_H */
diff --git a/monitor.c b/monitor.c
index 32d0264..80456fb 100644
--- a/monitor.c
+++ b/monitor.c
@@ -37,7 +37,7 @@ 
 #include "ui/qemu-spice.h"
 #include "sysemu/sysemu.h"
 #include "monitor/monitor.h"
-#include "monitor/readline.h"
+#include "qemu/readline.h"
 #include "ui/console.h"
 #include "sysemu/blockdev.h"
 #include "audio/audio.h"
diff --git a/readline.c b/readline.c
deleted file mode 100644
index ca894d1..0000000
--- a/readline.c
+++ /dev/null
@@ -1,495 +0,0 @@ 
-/*
- * 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 "monitor/readline.h"
-
-#define IS_NORM 0
-#define IS_ESC  1
-#define IS_CSI  2
-#define IS_SS3  3
-
-void readline_show_prompt(ReadLineState *rs)
-{
-    rs->printf_func(rs->opaque, "%s", rs->prompt);
-    rs->flush_func(rs->opaque);
-    rs->last_cmd_buf_index = 0;
-    rs->last_cmd_buf_size = 0;
-    rs->esc_state = IS_NORM;
-}
-
-/* update the displayed command line */
-static void readline_update(ReadLineState *rs)
-{
-    int i, delta, len;
-
-    if (rs->cmd_buf_size != rs->last_cmd_buf_size ||
-        memcmp(rs->cmd_buf, rs->last_cmd_buf, rs->cmd_buf_size) != 0) {
-        for(i = 0; i < rs->last_cmd_buf_index; i++) {
-            rs->printf_func(rs->opaque, "\033[D");
-        }
-        rs->cmd_buf[rs->cmd_buf_size] = '\0';
-        if (rs->read_password) {
-            len = strlen(rs->cmd_buf);
-            for(i = 0; i < len; i++)
-                rs->printf_func(rs->opaque, "*");
-        } else {
-            rs->printf_func(rs->opaque, "%s", rs->cmd_buf);
-        }
-        rs->printf_func(rs->opaque, "\033[K");
-        memcpy(rs->last_cmd_buf, rs->cmd_buf, rs->cmd_buf_size);
-        rs->last_cmd_buf_size = rs->cmd_buf_size;
-        rs->last_cmd_buf_index = rs->cmd_buf_size;
-    }
-    if (rs->cmd_buf_index != rs->last_cmd_buf_index) {
-        delta = rs->cmd_buf_index - rs->last_cmd_buf_index;
-        if (delta > 0) {
-            for(i = 0;i < delta; i++) {
-                rs->printf_func(rs->opaque, "\033[C");
-            }
-        } else {
-            delta = -delta;
-            for(i = 0;i < delta; i++) {
-                rs->printf_func(rs->opaque, "\033[D");
-            }
-        }
-        rs->last_cmd_buf_index = rs->cmd_buf_index;
-    }
-    rs->flush_func(rs->opaque);
-}
-
-static void readline_insert_char(ReadLineState *rs, int ch)
-{
-    if (rs->cmd_buf_index < READLINE_CMD_BUF_SIZE) {
-        memmove(rs->cmd_buf + rs->cmd_buf_index + 1,
-                rs->cmd_buf + rs->cmd_buf_index,
-                rs->cmd_buf_size - rs->cmd_buf_index);
-        rs->cmd_buf[rs->cmd_buf_index] = ch;
-        rs->cmd_buf_size++;
-        rs->cmd_buf_index++;
-    }
-}
-
-static void readline_backward_char(ReadLineState *rs)
-{
-    if (rs->cmd_buf_index > 0) {
-        rs->cmd_buf_index--;
-    }
-}
-
-static void readline_forward_char(ReadLineState *rs)
-{
-    if (rs->cmd_buf_index < rs->cmd_buf_size) {
-        rs->cmd_buf_index++;
-    }
-}
-
-static void readline_delete_char(ReadLineState *rs)
-{
-    if (rs->cmd_buf_index < rs->cmd_buf_size) {
-        memmove(rs->cmd_buf + rs->cmd_buf_index,
-                rs->cmd_buf + rs->cmd_buf_index + 1,
-                rs->cmd_buf_size - rs->cmd_buf_index - 1);
-        rs->cmd_buf_size--;
-    }
-}
-
-static void readline_backspace(ReadLineState *rs)
-{
-    if (rs->cmd_buf_index > 0) {
-        readline_backward_char(rs);
-        readline_delete_char(rs);
-    }
-}
-
-static void readline_backword(ReadLineState *rs)
-{
-    int start;
-
-    if (rs->cmd_buf_index == 0 || rs->cmd_buf_index > rs->cmd_buf_size) {
-        return;
-    }
-
-    start = rs->cmd_buf_index - 1;
-
-    /* find first word (backwards) */
-    while (start > 0) {
-        if (!qemu_isspace(rs->cmd_buf[start])) {
-            break;
-        }
-
-        --start;
-    }
-
-    /* find first space (backwards) */
-    while (start > 0) {
-        if (qemu_isspace(rs->cmd_buf[start])) {
-            ++start;
-            break;
-        }
-
-        --start;
-    }
-
-    /* remove word */
-    if (start < rs->cmd_buf_index) {
-        memmove(rs->cmd_buf + start,
-                rs->cmd_buf + rs->cmd_buf_index,
-                rs->cmd_buf_size - rs->cmd_buf_index);
-        rs->cmd_buf_size -= rs->cmd_buf_index - start;
-        rs->cmd_buf_index = start;
-    }
-}
-
-static void readline_bol(ReadLineState *rs)
-{
-    rs->cmd_buf_index = 0;
-}
-
-static void readline_eol(ReadLineState *rs)
-{
-    rs->cmd_buf_index = rs->cmd_buf_size;
-}
-
-static void readline_up_char(ReadLineState *rs)
-{
-    int idx;
-
-    if (rs->hist_entry == 0)
-	return;
-    if (rs->hist_entry == -1) {
-	/* Find latest entry */
-	for (idx = 0; idx < READLINE_MAX_CMDS; idx++) {
-	    if (rs->history[idx] == NULL)
-		break;
-	}
-	rs->hist_entry = idx;
-    }
-    rs->hist_entry--;
-    if (rs->hist_entry >= 0) {
-	pstrcpy(rs->cmd_buf, sizeof(rs->cmd_buf),
-                rs->history[rs->hist_entry]);
-	rs->cmd_buf_index = rs->cmd_buf_size = strlen(rs->cmd_buf);
-    }
-}
-
-static void readline_down_char(ReadLineState *rs)
-{
-    if (rs->hist_entry == -1)
-        return;
-    if (rs->hist_entry < READLINE_MAX_CMDS - 1 &&
-        rs->history[++rs->hist_entry] != NULL) {
-	pstrcpy(rs->cmd_buf, sizeof(rs->cmd_buf),
-                rs->history[rs->hist_entry]);
-    } else {
-        rs->cmd_buf[0] = 0;
-	rs->hist_entry = -1;
-    }
-    rs->cmd_buf_index = rs->cmd_buf_size = strlen(rs->cmd_buf);
-}
-
-static void readline_hist_add(ReadLineState *rs, const char *cmdline)
-{
-    char *hist_entry, *new_entry;
-    int idx;
-
-    if (cmdline[0] == '\0')
-	return;
-    new_entry = NULL;
-    if (rs->hist_entry != -1) {
-	/* We were editing an existing history entry: replace it */
-	hist_entry = rs->history[rs->hist_entry];
-	idx = rs->hist_entry;
-	if (strcmp(hist_entry, cmdline) == 0) {
-	    goto same_entry;
-	}
-    }
-    /* Search cmdline in history buffers */
-    for (idx = 0; idx < READLINE_MAX_CMDS; idx++) {
-	hist_entry = rs->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(&rs->history[idx], &rs->history[idx + 1],
-		    (READLINE_MAX_CMDS - (idx + 1)) * sizeof(char *));
-	    rs->history[READLINE_MAX_CMDS - 1] = NULL;
-	    for (; idx < READLINE_MAX_CMDS; idx++) {
-		if (rs->history[idx] == NULL)
-		    break;
-	    }
-	    break;
-	}
-    }
-    if (idx == READLINE_MAX_CMDS) {
-	/* Need to get one free slot */
-        g_free(rs->history[0]);
-	memmove(rs->history, &rs->history[1],
-	        (READLINE_MAX_CMDS - 1) * sizeof(char *));
-	rs->history[READLINE_MAX_CMDS - 1] = NULL;
-	idx = READLINE_MAX_CMDS - 1;
-    }
-    if (new_entry == NULL)
-        new_entry = g_strdup(cmdline);
-    rs->history[idx] = new_entry;
-    rs->hist_entry = -1;
-}
-
-/* completion support */
-
-void readline_add_completion(ReadLineState *rs, const char *str)
-{
-    if (rs->nb_completions < READLINE_MAX_COMPLETIONS) {
-        rs->completions[rs->nb_completions++] = g_strdup(str);
-    }
-}
-
-void readline_set_completion_index(ReadLineState *rs, int index)
-{
-    rs->completion_index = index;
-}
-
-static void readline_completion(ReadLineState *rs)
-{
-    int len, i, j, max_width, nb_cols, max_prefix;
-    char *cmdline;
-
-    rs->nb_completions = 0;
-
-    cmdline = g_malloc(rs->cmd_buf_index + 1);
-    memcpy(cmdline, rs->cmd_buf, rs->cmd_buf_index);
-    cmdline[rs->cmd_buf_index] = '\0';
-    rs->completion_finder(rs->opaque, cmdline);
-    g_free(cmdline);
-
-    /* no completion found */
-    if (rs->nb_completions <= 0)
-        return;
-    if (rs->nb_completions == 1) {
-        len = strlen(rs->completions[0]);
-        for(i = rs->completion_index; i < len; i++) {
-            readline_insert_char(rs, rs->completions[0][i]);
-        }
-        /* extra space for next argument. XXX: make it more generic */
-        if (len > 0 && rs->completions[0][len - 1] != '/')
-            readline_insert_char(rs, ' ');
-    } else {
-        rs->printf_func(rs->opaque, "\n");
-        max_width = 0;
-        max_prefix = 0;	
-        for(i = 0; i < rs->nb_completions; i++) {
-            len = strlen(rs->completions[i]);
-            if (i==0) {
-                max_prefix = len;
-            } else {
-                if (len < max_prefix)
-                    max_prefix = len;
-                for(j=0; j<max_prefix; j++) {
-                    if (rs->completions[i][j] != rs->completions[0][j])
-                        max_prefix = j;
-                }
-            }
-            if (len > max_width)
-                max_width = len;
-        }
-        if (max_prefix > 0) 
-            for(i = rs->completion_index; i < max_prefix; i++) {
-                readline_insert_char(rs, rs->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 < rs->nb_completions; i++) {
-            rs->printf_func(rs->opaque, "%-*s", max_width, rs->completions[i]);
-            if (++j == nb_cols || i == (rs->nb_completions - 1)) {
-                rs->printf_func(rs->opaque, "\n");
-                j = 0;
-            }
-        }
-        readline_show_prompt(rs);
-    }
-    for (i = 0; i < rs->nb_completions; i++) {
-        g_free(rs->completions[i]);
-    }
-}
-
-/* return true if command handled */
-void readline_handle_byte(ReadLineState *rs, int ch)
-{
-    switch(rs->esc_state) {
-    case IS_NORM:
-        switch(ch) {
-        case 1:
-            readline_bol(rs);
-            break;
-        case 4:
-            readline_delete_char(rs);
-            break;
-        case 5:
-            readline_eol(rs);
-            break;
-        case 9:
-            readline_completion(rs);
-            break;
-        case 10:
-        case 13:
-            rs->cmd_buf[rs->cmd_buf_size] = '\0';
-            if (!rs->read_password)
-                readline_hist_add(rs, rs->cmd_buf);
-            rs->printf_func(rs->opaque, "\n");
-            rs->cmd_buf_index = 0;
-            rs->cmd_buf_size = 0;
-            rs->last_cmd_buf_index = 0;
-            rs->last_cmd_buf_size = 0;
-            rs->readline_func(rs->opaque, rs->cmd_buf, rs->readline_opaque);
-            break;
-        case 23:
-            /* ^W */
-            readline_backword(rs);
-            break;
-        case 27:
-            rs->esc_state = IS_ESC;
-            break;
-        case 127:
-        case 8:
-            readline_backspace(rs);
-            break;
-	case 155:
-            rs->esc_state = IS_CSI;
-	    break;
-        default:
-            if (ch >= 32) {
-                readline_insert_char(rs, ch);
-            }
-            break;
-        }
-        break;
-    case IS_ESC:
-        if (ch == '[') {
-            rs->esc_state = IS_CSI;
-            rs->esc_param = 0;
-        } else if (ch == 'O') {
-            rs->esc_state = IS_SS3;
-            rs->esc_param = 0;
-        } else {
-            rs->esc_state = IS_NORM;
-        }
-        break;
-    case IS_CSI:
-        switch(ch) {
-	case 'A':
-	case 'F':
-	    readline_up_char(rs);
-	    break;
-	case 'B':
-	case 'E':
-	    readline_down_char(rs);
-	    break;
-        case 'D':
-            readline_backward_char(rs);
-            break;
-        case 'C':
-            readline_forward_char(rs);
-            break;
-        case '0' ... '9':
-            rs->esc_param = rs->esc_param * 10 + (ch - '0');
-            goto the_end;
-        case '~':
-            switch(rs->esc_param) {
-            case 1:
-                readline_bol(rs);
-                break;
-            case 3:
-                readline_delete_char(rs);
-                break;
-            case 4:
-                readline_eol(rs);
-                break;
-            }
-            break;
-        default:
-            break;
-        }
-        rs->esc_state = IS_NORM;
-    the_end:
-        break;
-    case IS_SS3:
-        switch(ch) {
-        case 'F':
-            readline_eol(rs);
-            break;
-        case 'H':
-            readline_bol(rs);
-            break;
-        }
-        rs->esc_state = IS_NORM;
-        break;
-    }
-    readline_update(rs);
-}
-
-void readline_start(ReadLineState *rs, const char *prompt, int read_password,
-                    ReadLineFunc *readline_func, void *opaque)
-{
-    pstrcpy(rs->prompt, sizeof(rs->prompt), prompt);
-    rs->readline_func = readline_func;
-    rs->readline_opaque = opaque;
-    rs->read_password = read_password;
-    readline_restart(rs);
-}
-
-void readline_restart(ReadLineState *rs)
-{
-    rs->cmd_buf_index = 0;
-    rs->cmd_buf_size = 0;
-}
-
-const char *readline_get_history(ReadLineState *rs, unsigned int index)
-{
-    if (index >= READLINE_MAX_CMDS)
-        return NULL;
-    return rs->history[index];
-}
-
-ReadLineState *readline_init(ReadLinePrintfFunc *printf_func,
-                             ReadLineFlushFunc *flush_func,
-                             void *opaque,
-                             ReadLineCompletionFunc *completion_finder)
-{
-    ReadLineState *rs = g_malloc0(sizeof(*rs));
-
-    rs->hist_entry = -1;
-    rs->opaque = opaque;
-    rs->printf_func = printf_func;
-    rs->flush_func = flush_func;
-    rs->completion_finder = completion_finder;
-
-    return rs;
-}
diff --git a/util/Makefile.objs b/util/Makefile.objs
index af3e5cb..937376b 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -13,3 +13,4 @@  util-obj-y += hexdump.o
 util-obj-y += crc32c.o
 util-obj-y += throttle.o
 util-obj-y += getauxval.o
+util-obj-y += readline.o
diff --git a/util/readline.c b/util/readline.c
new file mode 100644
index 0000000..8441be4
--- /dev/null
+++ b/util/readline.c
@@ -0,0 +1,495 @@ 
+/*
+ * 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 "qemu/readline.h"
+
+#define IS_NORM 0
+#define IS_ESC  1
+#define IS_CSI  2
+#define IS_SS3  3
+
+void readline_show_prompt(ReadLineState *rs)
+{
+    rs->printf_func(rs->opaque, "%s", rs->prompt);
+    rs->flush_func(rs->opaque);
+    rs->last_cmd_buf_index = 0;
+    rs->last_cmd_buf_size = 0;
+    rs->esc_state = IS_NORM;
+}
+
+/* update the displayed command line */
+static void readline_update(ReadLineState *rs)
+{
+    int i, delta, len;
+
+    if (rs->cmd_buf_size != rs->last_cmd_buf_size ||
+        memcmp(rs->cmd_buf, rs->last_cmd_buf, rs->cmd_buf_size) != 0) {
+        for(i = 0; i < rs->last_cmd_buf_index; i++) {
+            rs->printf_func(rs->opaque, "\033[D");
+        }
+        rs->cmd_buf[rs->cmd_buf_size] = '\0';
+        if (rs->read_password) {
+            len = strlen(rs->cmd_buf);
+            for(i = 0; i < len; i++)
+                rs->printf_func(rs->opaque, "*");
+        } else {
+            rs->printf_func(rs->opaque, "%s", rs->cmd_buf);
+        }
+        rs->printf_func(rs->opaque, "\033[K");
+        memcpy(rs->last_cmd_buf, rs->cmd_buf, rs->cmd_buf_size);
+        rs->last_cmd_buf_size = rs->cmd_buf_size;
+        rs->last_cmd_buf_index = rs->cmd_buf_size;
+    }
+    if (rs->cmd_buf_index != rs->last_cmd_buf_index) {
+        delta = rs->cmd_buf_index - rs->last_cmd_buf_index;
+        if (delta > 0) {
+            for(i = 0;i < delta; i++) {
+                rs->printf_func(rs->opaque, "\033[C");
+            }
+        } else {
+            delta = -delta;
+            for(i = 0;i < delta; i++) {
+                rs->printf_func(rs->opaque, "\033[D");
+            }
+        }
+        rs->last_cmd_buf_index = rs->cmd_buf_index;
+    }
+    rs->flush_func(rs->opaque);
+}
+
+static void readline_insert_char(ReadLineState *rs, int ch)
+{
+    if (rs->cmd_buf_index < READLINE_CMD_BUF_SIZE) {
+        memmove(rs->cmd_buf + rs->cmd_buf_index + 1,
+                rs->cmd_buf + rs->cmd_buf_index,
+                rs->cmd_buf_size - rs->cmd_buf_index);
+        rs->cmd_buf[rs->cmd_buf_index] = ch;
+        rs->cmd_buf_size++;
+        rs->cmd_buf_index++;
+    }
+}
+
+static void readline_backward_char(ReadLineState *rs)
+{
+    if (rs->cmd_buf_index > 0) {
+        rs->cmd_buf_index--;
+    }
+}
+
+static void readline_forward_char(ReadLineState *rs)
+{
+    if (rs->cmd_buf_index < rs->cmd_buf_size) {
+        rs->cmd_buf_index++;
+    }
+}
+
+static void readline_delete_char(ReadLineState *rs)
+{
+    if (rs->cmd_buf_index < rs->cmd_buf_size) {
+        memmove(rs->cmd_buf + rs->cmd_buf_index,
+                rs->cmd_buf + rs->cmd_buf_index + 1,
+                rs->cmd_buf_size - rs->cmd_buf_index - 1);
+        rs->cmd_buf_size--;
+    }
+}
+
+static void readline_backspace(ReadLineState *rs)
+{
+    if (rs->cmd_buf_index > 0) {
+        readline_backward_char(rs);
+        readline_delete_char(rs);
+    }
+}
+
+static void readline_backword(ReadLineState *rs)
+{
+    int start;
+
+    if (rs->cmd_buf_index == 0 || rs->cmd_buf_index > rs->cmd_buf_size) {
+        return;
+    }
+
+    start = rs->cmd_buf_index - 1;
+
+    /* find first word (backwards) */
+    while (start > 0) {
+        if (!qemu_isspace(rs->cmd_buf[start])) {
+            break;
+        }
+
+        --start;
+    }
+
+    /* find first space (backwards) */
+    while (start > 0) {
+        if (qemu_isspace(rs->cmd_buf[start])) {
+            ++start;
+            break;
+        }
+
+        --start;
+    }
+
+    /* remove word */
+    if (start < rs->cmd_buf_index) {
+        memmove(rs->cmd_buf + start,
+                rs->cmd_buf + rs->cmd_buf_index,
+                rs->cmd_buf_size - rs->cmd_buf_index);
+        rs->cmd_buf_size -= rs->cmd_buf_index - start;
+        rs->cmd_buf_index = start;
+    }
+}
+
+static void readline_bol(ReadLineState *rs)
+{
+    rs->cmd_buf_index = 0;
+}
+
+static void readline_eol(ReadLineState *rs)
+{
+    rs->cmd_buf_index = rs->cmd_buf_size;
+}
+
+static void readline_up_char(ReadLineState *rs)
+{
+    int idx;
+
+    if (rs->hist_entry == 0)
+	return;
+    if (rs->hist_entry == -1) {
+	/* Find latest entry */
+	for (idx = 0; idx < READLINE_MAX_CMDS; idx++) {
+	    if (rs->history[idx] == NULL)
+		break;
+	}
+	rs->hist_entry = idx;
+    }
+    rs->hist_entry--;
+    if (rs->hist_entry >= 0) {
+	pstrcpy(rs->cmd_buf, sizeof(rs->cmd_buf),
+                rs->history[rs->hist_entry]);
+	rs->cmd_buf_index = rs->cmd_buf_size = strlen(rs->cmd_buf);
+    }
+}
+
+static void readline_down_char(ReadLineState *rs)
+{
+    if (rs->hist_entry == -1)
+        return;
+    if (rs->hist_entry < READLINE_MAX_CMDS - 1 &&
+        rs->history[++rs->hist_entry] != NULL) {
+	pstrcpy(rs->cmd_buf, sizeof(rs->cmd_buf),
+                rs->history[rs->hist_entry]);
+    } else {
+        rs->cmd_buf[0] = 0;
+	rs->hist_entry = -1;
+    }
+    rs->cmd_buf_index = rs->cmd_buf_size = strlen(rs->cmd_buf);
+}
+
+static void readline_hist_add(ReadLineState *rs, const char *cmdline)
+{
+    char *hist_entry, *new_entry;
+    int idx;
+
+    if (cmdline[0] == '\0')
+	return;
+    new_entry = NULL;
+    if (rs->hist_entry != -1) {
+	/* We were editing an existing history entry: replace it */
+	hist_entry = rs->history[rs->hist_entry];
+	idx = rs->hist_entry;
+	if (strcmp(hist_entry, cmdline) == 0) {
+	    goto same_entry;
+	}
+    }
+    /* Search cmdline in history buffers */
+    for (idx = 0; idx < READLINE_MAX_CMDS; idx++) {
+	hist_entry = rs->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(&rs->history[idx], &rs->history[idx + 1],
+		    (READLINE_MAX_CMDS - (idx + 1)) * sizeof(char *));
+	    rs->history[READLINE_MAX_CMDS - 1] = NULL;
+	    for (; idx < READLINE_MAX_CMDS; idx++) {
+		if (rs->history[idx] == NULL)
+		    break;
+	    }
+	    break;
+	}
+    }
+    if (idx == READLINE_MAX_CMDS) {
+	/* Need to get one free slot */
+        g_free(rs->history[0]);
+	memmove(rs->history, &rs->history[1],
+	        (READLINE_MAX_CMDS - 1) * sizeof(char *));
+	rs->history[READLINE_MAX_CMDS - 1] = NULL;
+	idx = READLINE_MAX_CMDS - 1;
+    }
+    if (new_entry == NULL)
+        new_entry = g_strdup(cmdline);
+    rs->history[idx] = new_entry;
+    rs->hist_entry = -1;
+}
+
+/* completion support */
+
+void readline_add_completion(ReadLineState *rs, const char *str)
+{
+    if (rs->nb_completions < READLINE_MAX_COMPLETIONS) {
+        rs->completions[rs->nb_completions++] = g_strdup(str);
+    }
+}
+
+void readline_set_completion_index(ReadLineState *rs, int index)
+{
+    rs->completion_index = index;
+}
+
+static void readline_completion(ReadLineState *rs)
+{
+    int len, i, j, max_width, nb_cols, max_prefix;
+    char *cmdline;
+
+    rs->nb_completions = 0;
+
+    cmdline = g_malloc(rs->cmd_buf_index + 1);
+    memcpy(cmdline, rs->cmd_buf, rs->cmd_buf_index);
+    cmdline[rs->cmd_buf_index] = '\0';
+    rs->completion_finder(rs->opaque, cmdline);
+    g_free(cmdline);
+
+    /* no completion found */
+    if (rs->nb_completions <= 0)
+        return;
+    if (rs->nb_completions == 1) {
+        len = strlen(rs->completions[0]);
+        for(i = rs->completion_index; i < len; i++) {
+            readline_insert_char(rs, rs->completions[0][i]);
+        }
+        /* extra space for next argument. XXX: make it more generic */
+        if (len > 0 && rs->completions[0][len - 1] != '/')
+            readline_insert_char(rs, ' ');
+    } else {
+        rs->printf_func(rs->opaque, "\n");
+        max_width = 0;
+        max_prefix = 0;	
+        for(i = 0; i < rs->nb_completions; i++) {
+            len = strlen(rs->completions[i]);
+            if (i==0) {
+                max_prefix = len;
+            } else {
+                if (len < max_prefix)
+                    max_prefix = len;
+                for(j=0; j<max_prefix; j++) {
+                    if (rs->completions[i][j] != rs->completions[0][j])
+                        max_prefix = j;
+                }
+            }
+            if (len > max_width)
+                max_width = len;
+        }
+        if (max_prefix > 0) 
+            for(i = rs->completion_index; i < max_prefix; i++) {
+                readline_insert_char(rs, rs->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 < rs->nb_completions; i++) {
+            rs->printf_func(rs->opaque, "%-*s", max_width, rs->completions[i]);
+            if (++j == nb_cols || i == (rs->nb_completions - 1)) {
+                rs->printf_func(rs->opaque, "\n");
+                j = 0;
+            }
+        }
+        readline_show_prompt(rs);
+    }
+    for (i = 0; i < rs->nb_completions; i++) {
+        g_free(rs->completions[i]);
+    }
+}
+
+/* return true if command handled */
+void readline_handle_byte(ReadLineState *rs, int ch)
+{
+    switch(rs->esc_state) {
+    case IS_NORM:
+        switch(ch) {
+        case 1:
+            readline_bol(rs);
+            break;
+        case 4:
+            readline_delete_char(rs);
+            break;
+        case 5:
+            readline_eol(rs);
+            break;
+        case 9:
+            readline_completion(rs);
+            break;
+        case 10:
+        case 13:
+            rs->cmd_buf[rs->cmd_buf_size] = '\0';
+            if (!rs->read_password)
+                readline_hist_add(rs, rs->cmd_buf);
+            rs->printf_func(rs->opaque, "\n");
+            rs->cmd_buf_index = 0;
+            rs->cmd_buf_size = 0;
+            rs->last_cmd_buf_index = 0;
+            rs->last_cmd_buf_size = 0;
+            rs->readline_func(rs->opaque, rs->cmd_buf, rs->readline_opaque);
+            break;
+        case 23:
+            /* ^W */
+            readline_backword(rs);
+            break;
+        case 27:
+            rs->esc_state = IS_ESC;
+            break;
+        case 127:
+        case 8:
+            readline_backspace(rs);
+            break;
+	case 155:
+            rs->esc_state = IS_CSI;
+	    break;
+        default:
+            if (ch >= 32) {
+                readline_insert_char(rs, ch);
+            }
+            break;
+        }
+        break;
+    case IS_ESC:
+        if (ch == '[') {
+            rs->esc_state = IS_CSI;
+            rs->esc_param = 0;
+        } else if (ch == 'O') {
+            rs->esc_state = IS_SS3;
+            rs->esc_param = 0;
+        } else {
+            rs->esc_state = IS_NORM;
+        }
+        break;
+    case IS_CSI:
+        switch(ch) {
+	case 'A':
+	case 'F':
+	    readline_up_char(rs);
+	    break;
+	case 'B':
+	case 'E':
+	    readline_down_char(rs);
+	    break;
+        case 'D':
+            readline_backward_char(rs);
+            break;
+        case 'C':
+            readline_forward_char(rs);
+            break;
+        case '0' ... '9':
+            rs->esc_param = rs->esc_param * 10 + (ch - '0');
+            goto the_end;
+        case '~':
+            switch(rs->esc_param) {
+            case 1:
+                readline_bol(rs);
+                break;
+            case 3:
+                readline_delete_char(rs);
+                break;
+            case 4:
+                readline_eol(rs);
+                break;
+            }
+            break;
+        default:
+            break;
+        }
+        rs->esc_state = IS_NORM;
+    the_end:
+        break;
+    case IS_SS3:
+        switch(ch) {
+        case 'F':
+            readline_eol(rs);
+            break;
+        case 'H':
+            readline_bol(rs);
+            break;
+        }
+        rs->esc_state = IS_NORM;
+        break;
+    }
+    readline_update(rs);
+}
+
+void readline_start(ReadLineState *rs, const char *prompt, int read_password,
+                    ReadLineFunc *readline_func, void *opaque)
+{
+    pstrcpy(rs->prompt, sizeof(rs->prompt), prompt);
+    rs->readline_func = readline_func;
+    rs->readline_opaque = opaque;
+    rs->read_password = read_password;
+    readline_restart(rs);
+}
+
+void readline_restart(ReadLineState *rs)
+{
+    rs->cmd_buf_index = 0;
+    rs->cmd_buf_size = 0;
+}
+
+const char *readline_get_history(ReadLineState *rs, unsigned int index)
+{
+    if (index >= READLINE_MAX_CMDS)
+        return NULL;
+    return rs->history[index];
+}
+
+ReadLineState *readline_init(ReadLinePrintfFunc *printf_func,
+                             ReadLineFlushFunc *flush_func,
+                             void *opaque,
+                             ReadLineCompletionFunc *completion_finder)
+{
+    ReadLineState *rs = g_malloc0(sizeof(*rs));
+
+    rs->hist_entry = -1;
+    rs->opaque = opaque;
+    rs->printf_func = printf_func;
+    rs->flush_func = flush_func;
+    rs->completion_finder = completion_finder;
+
+    return rs;
+}