diff options
Diffstat (limited to 'monitor.c')
| -rw-r--r-- | monitor.c | 123 |
1 files changed, 123 insertions, 0 deletions
@@ -31,6 +31,7 @@ #endif #define TERM_CMD_BUF_SIZE 4095 +#define TERM_MAX_CMDS 64 #define IS_NORM 0 #define IS_ESC 1 @@ -44,6 +45,9 @@ static int term_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; + /* * Supported types: * @@ -190,6 +194,17 @@ static void do_info_registers(void) #endif } +static void do_info_history (void) +{ + int i; + + for (i = 0; i < TERM_MAX_CMDS; i++) { + if (term_history[i] == NULL) + break; + term_printf("%d: '%s'\n", i, term_history[i]); + } +} + static void do_quit(void) { exit(0); @@ -499,6 +514,8 @@ static term_cmd_t info_cmds[] = { "", "show the block devices" }, { "registers", "", do_info_registers, "", "show the cpu registers" }, + { "history", "", do_info_history, + "", "show the command line history", }, { NULL, NULL, }, }; @@ -1056,6 +1073,13 @@ static void term_show_prompt(void) term_esc_state = IS_NORM; } +static void term_print_cmdline (const char *cmdline) +{ + term_show_prompt(); + term_printf(cmdline); + term_flush(); +} + static void term_insert_char(int ch) { if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) { @@ -1120,6 +1144,92 @@ static void term_eol(void) term_forward_char(); } +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) { + strcpy(term_cmd_buf, term_history[term_hist_entry]); + term_printf("\n"); + term_print_cmdline(term_cmd_buf); + 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) { + strcpy(term_cmd_buf, term_history[term_hist_entry]); + } else { + term_hist_entry = -1; + } + term_printf("\n"); + term_print_cmdline(term_cmd_buf); + 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_history[TERM_MAX_CMDS] - &term_history[idx + 1]); + 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_history[TERM_MAX_CMDS] - &term_history[1]); + 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; +} + /* return true if command handled */ static void term_handle_byte(int ch) { @@ -1135,6 +1245,7 @@ static void term_handle_byte(int ch) case 10: case 13: term_cmd_buf[term_cmd_buf_size] = '\0'; + term_hist_add(term_cmd_buf); term_printf("\n"); term_handle_command(term_cmd_buf); term_show_prompt(); @@ -1146,6 +1257,9 @@ static void term_handle_byte(int ch) case 8: term_backspace(); break; + case 155: + term_esc_state = IS_CSI; + break; default: if (ch >= 32) { term_insert_char(ch); @@ -1163,6 +1277,14 @@ static void term_handle_byte(int ch) 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; @@ -1290,5 +1412,6 @@ void monitor_init(void) QEMU_VERSION); term_show_prompt(); } + term_hist_entry = -1; qemu_add_fd_read_handler(0, term_can_read, term_read, NULL); } |