| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| #pragma ident "%Z%%M% %I% %E% SMI" |
| |
| /* |
| * The MDB command buffer is a simple structure that keeps track of the |
| * command history list, and provides operations to manipulate the current |
| * buffer according to the various emacs editing options. The terminal |
| * code uses this code to keep track of the actual contents of the command |
| * line, and then uses this content to perform redraw operations. |
| */ |
| |
| #include <strings.h> |
| #include <stdio.h> |
| #include <ctype.h> |
| |
| #include <mdb/mdb_modapi.h> |
| #include <mdb/mdb_cmdbuf.h> |
| #include <mdb/mdb_debug.h> |
| #include <mdb/mdb.h> |
| |
| #define CMDBUF_LINELEN BUFSIZ /* Length of each buffer line */ |
| #define CMDBUF_TABLEN 8 /* Length of a tab in spaces */ |
| |
| static void |
| cmdbuf_shiftr(mdb_cmdbuf_t *cmd, size_t nbytes) |
| { |
| bcopy(&cmd->cmd_buf[cmd->cmd_bufidx], |
| &cmd->cmd_buf[cmd->cmd_bufidx + nbytes], |
| cmd->cmd_buflen - cmd->cmd_bufidx); |
| } |
| |
| static void |
| mdb_cmdbuf_allocchunk(mdb_cmdbuf_t *cmd) |
| { |
| int i; |
| char **newhistory; |
| ssize_t newhalloc = cmd->cmd_halloc + MDB_DEF_HISTLEN; |
| |
| if (newhalloc > cmd->cmd_histlen) |
| newhalloc = cmd->cmd_histlen; |
| newhistory = mdb_alloc(newhalloc * sizeof (char *), UM_SLEEP); |
| bcopy(cmd->cmd_history, newhistory, cmd->cmd_halloc * sizeof (char *)); |
| mdb_free(cmd->cmd_history, cmd->cmd_halloc * sizeof (char *)); |
| for (i = cmd->cmd_halloc; i < newhalloc; i++) |
| newhistory[i] = mdb_alloc(CMDBUF_LINELEN, UM_SLEEP); |
| cmd->cmd_history = newhistory; |
| cmd->cmd_halloc = newhalloc; |
| } |
| |
| void |
| mdb_cmdbuf_create(mdb_cmdbuf_t *cmd) |
| { |
| size_t i; |
| |
| cmd->cmd_halloc = MDB_DEF_HISTLEN < mdb.m_histlen ? |
| MDB_DEF_HISTLEN : mdb.m_histlen; |
| |
| cmd->cmd_history = mdb_alloc(cmd->cmd_halloc * sizeof (char *), |
| UM_SLEEP); |
| cmd->cmd_linebuf = mdb_alloc(CMDBUF_LINELEN, UM_SLEEP); |
| |
| for (i = 0; i < cmd->cmd_halloc; i++) |
| cmd->cmd_history[i] = mdb_alloc(CMDBUF_LINELEN, UM_SLEEP); |
| |
| cmd->cmd_buf = cmd->cmd_history[0]; |
| cmd->cmd_linelen = CMDBUF_LINELEN; |
| cmd->cmd_histlen = mdb.m_histlen; |
| cmd->cmd_buflen = 0; |
| cmd->cmd_bufidx = 0; |
| cmd->cmd_hold = 0; |
| cmd->cmd_hnew = 0; |
| cmd->cmd_hcur = 0; |
| cmd->cmd_hlen = 0; |
| } |
| |
| void |
| mdb_cmdbuf_destroy(mdb_cmdbuf_t *cmd) |
| { |
| size_t i; |
| |
| for (i = 0; i < cmd->cmd_halloc; i++) |
| mdb_free(cmd->cmd_history[i], CMDBUF_LINELEN); |
| |
| mdb_free(cmd->cmd_linebuf, CMDBUF_LINELEN); |
| mdb_free(cmd->cmd_history, cmd->cmd_halloc * sizeof (char *)); |
| } |
| |
| int |
| mdb_cmdbuf_caninsert(mdb_cmdbuf_t *cmd, size_t nbytes) |
| { |
| return (cmd->cmd_buflen + nbytes < cmd->cmd_linelen); |
| } |
| |
| int |
| mdb_cmdbuf_atstart(mdb_cmdbuf_t *cmd) |
| { |
| return (cmd->cmd_bufidx == 0); |
| } |
| |
| int |
| mdb_cmdbuf_atend(mdb_cmdbuf_t *cmd) |
| { |
| return (cmd->cmd_bufidx == cmd->cmd_buflen); |
| } |
| |
| int |
| mdb_cmdbuf_insert(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (c == '\t') { |
| if (cmd->cmd_buflen + CMDBUF_TABLEN < cmd->cmd_linelen) { |
| int i; |
| |
| if (cmd->cmd_buflen != cmd->cmd_bufidx) |
| cmdbuf_shiftr(cmd, CMDBUF_TABLEN); |
| |
| for (i = 0; i < CMDBUF_TABLEN; i++) |
| cmd->cmd_buf[cmd->cmd_bufidx++] = ' '; |
| |
| cmd->cmd_buflen += CMDBUF_TABLEN; |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| if (c < ' ' || c > '~') |
| return (-1); |
| |
| if (cmd->cmd_buflen < cmd->cmd_linelen) { |
| if (cmd->cmd_buflen != cmd->cmd_bufidx) |
| cmdbuf_shiftr(cmd, 1); |
| |
| cmd->cmd_buf[cmd->cmd_bufidx++] = (char)c; |
| cmd->cmd_buflen++; |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| const char * |
| mdb_cmdbuf_accept(mdb_cmdbuf_t *cmd) |
| { |
| if (cmd->cmd_bufidx < cmd->cmd_linelen) { |
| int is_repeating = 0; |
| |
| cmd->cmd_buf[cmd->cmd_buflen++] = '\0'; |
| (void) strcpy(cmd->cmd_linebuf, cmd->cmd_buf); |
| |
| if (cmd->cmd_hold != cmd->cmd_hnew) { |
| int lastidx = cmd->cmd_hnew == 0 ? cmd->cmd_halloc - 1 : |
| cmd->cmd_hnew - 1; |
| |
| is_repeating = strcmp(cmd->cmd_buf, |
| cmd->cmd_history[lastidx]) == 0; |
| } |
| |
| /* |
| * Don't bother inserting empty or repeating buffers into the |
| * history ring. |
| */ |
| if (cmd->cmd_buflen > 1 && !is_repeating) { |
| cmd->cmd_hnew = (cmd->cmd_hnew + 1) % cmd->cmd_histlen; |
| if (cmd->cmd_hnew >= cmd->cmd_halloc) |
| mdb_cmdbuf_allocchunk(cmd); |
| |
| cmd->cmd_buf = cmd->cmd_history[cmd->cmd_hnew]; |
| cmd->cmd_hcur = cmd->cmd_hnew; |
| |
| if (cmd->cmd_hlen + 1 == cmd->cmd_histlen) |
| cmd->cmd_hold = |
| (cmd->cmd_hold + 1) % cmd->cmd_histlen; |
| else |
| cmd->cmd_hlen++; |
| } else if (is_repeating) { |
| cmd->cmd_hcur = cmd->cmd_hnew; |
| } |
| |
| cmd->cmd_bufidx = 0; |
| cmd->cmd_buflen = 0; |
| |
| return ((const char *)cmd->cmd_linebuf); |
| } |
| |
| return (NULL); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_backspace(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx > 0) { |
| if (cmd->cmd_buflen != cmd->cmd_bufidx) { |
| bcopy(&cmd->cmd_buf[cmd->cmd_bufidx], |
| &cmd->cmd_buf[cmd->cmd_bufidx - 1], |
| cmd->cmd_buflen - cmd->cmd_bufidx); |
| } |
| |
| cmd->cmd_bufidx--; |
| cmd->cmd_buflen--; |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_delchar(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx < cmd->cmd_buflen) { |
| if (cmd->cmd_bufidx < --cmd->cmd_buflen) { |
| bcopy(&cmd->cmd_buf[cmd->cmd_bufidx + 1], |
| &cmd->cmd_buf[cmd->cmd_bufidx], |
| cmd->cmd_buflen - cmd->cmd_bufidx); |
| } |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_fwdchar(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx < cmd->cmd_buflen) { |
| cmd->cmd_bufidx++; |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_backchar(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx > 0) { |
| cmd->cmd_bufidx--; |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| int |
| mdb_cmdbuf_transpose(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx > 0 && cmd->cmd_buflen > 1) { |
| c = cmd->cmd_buf[cmd->cmd_bufidx - 1]; |
| |
| if (cmd->cmd_bufidx == cmd->cmd_buflen) { |
| cmd->cmd_buf[cmd->cmd_bufidx - 1] = |
| cmd->cmd_buf[cmd->cmd_bufidx - 2]; |
| cmd->cmd_buf[cmd->cmd_bufidx - 2] = (char)c; |
| } else { |
| cmd->cmd_buf[cmd->cmd_bufidx - 1] = |
| cmd->cmd_buf[cmd->cmd_bufidx]; |
| cmd->cmd_buf[cmd->cmd_bufidx++] = (char)c; |
| } |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_home(mdb_cmdbuf_t *cmd, int c) |
| { |
| cmd->cmd_bufidx = 0; |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_end(mdb_cmdbuf_t *cmd, int c) |
| { |
| cmd->cmd_bufidx = cmd->cmd_buflen; |
| return (0); |
| } |
| |
| static size_t |
| fwdword_index(mdb_cmdbuf_t *cmd) |
| { |
| size_t i = cmd->cmd_bufidx + 1; |
| |
| ASSERT(cmd->cmd_bufidx < cmd->cmd_buflen); |
| |
| while (i < cmd->cmd_buflen && isspace(cmd->cmd_buf[i])) |
| i++; |
| |
| while (i < cmd->cmd_buflen && !isspace(cmd->cmd_buf[i]) && |
| !isalnum(cmd->cmd_buf[i]) && cmd->cmd_buf[i] != '_') |
| i++; |
| |
| while (i < cmd->cmd_buflen && |
| (isalnum(cmd->cmd_buf[i]) || cmd->cmd_buf[i] == '_')) |
| i++; |
| |
| return (i); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_fwdword(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx == cmd->cmd_buflen) |
| return (-1); |
| |
| cmd->cmd_bufidx = fwdword_index(cmd); |
| |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_killfwdword(mdb_cmdbuf_t *cmd, int c) |
| { |
| size_t i; |
| |
| if (cmd->cmd_bufidx == cmd->cmd_buflen) |
| return (-1); |
| |
| i = fwdword_index(cmd); |
| |
| bcopy(&cmd->cmd_buf[i], &cmd->cmd_buf[cmd->cmd_bufidx], |
| cmd->cmd_buflen - i); |
| |
| cmd->cmd_buflen -= i - cmd->cmd_bufidx; |
| |
| return (0); |
| } |
| |
| static size_t |
| backword_index(mdb_cmdbuf_t *cmd) |
| { |
| size_t i = cmd->cmd_bufidx - 1; |
| |
| ASSERT(cmd->cmd_bufidx != 0); |
| |
| while (i != 0 && isspace(cmd->cmd_buf[i])) |
| i--; |
| |
| while (i != 0 && !isspace(cmd->cmd_buf[i]) && |
| !isalnum(cmd->cmd_buf[i]) && cmd->cmd_buf[i] != '_') |
| i--; |
| |
| while (i != 0 && (isalnum(cmd->cmd_buf[i]) || cmd->cmd_buf[i] == '_')) |
| i--; |
| |
| if (i != 0) |
| i++; |
| |
| return (i); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_backword(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_bufidx == 0) |
| return (-1); |
| |
| cmd->cmd_bufidx = backword_index(cmd); |
| |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_killbackword(mdb_cmdbuf_t *cmd, int c) |
| { |
| size_t i; |
| |
| if (cmd->cmd_bufidx == 0) |
| return (-1); |
| |
| i = backword_index(cmd); |
| |
| bcopy(&cmd->cmd_buf[cmd->cmd_bufidx], &cmd->cmd_buf[i], |
| cmd->cmd_buflen - cmd->cmd_bufidx); |
| |
| cmd->cmd_buflen -= cmd->cmd_bufidx - i; |
| cmd->cmd_bufidx = i; |
| |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_kill(mdb_cmdbuf_t *cmd, int c) |
| { |
| cmd->cmd_buflen = cmd->cmd_bufidx; |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_reset(mdb_cmdbuf_t *cmd, int c) |
| { |
| cmd->cmd_buflen = 0; |
| cmd->cmd_bufidx = 0; |
| return (0); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_prevhist(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_hcur != cmd->cmd_hold) { |
| if (cmd->cmd_hcur-- == cmd->cmd_hnew) { |
| cmd->cmd_buf[cmd->cmd_buflen] = 0; |
| (void) strcpy(cmd->cmd_linebuf, cmd->cmd_buf); |
| } |
| |
| if (cmd->cmd_hcur < 0) |
| cmd->cmd_hcur = cmd->cmd_halloc - 1; |
| |
| (void) strcpy(cmd->cmd_buf, cmd->cmd_history[cmd->cmd_hcur]); |
| cmd->cmd_bufidx = strlen(cmd->cmd_buf); |
| cmd->cmd_buflen = cmd->cmd_bufidx; |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_nexthist(mdb_cmdbuf_t *cmd, int c) |
| { |
| if (cmd->cmd_hcur != cmd->cmd_hnew) { |
| cmd->cmd_hcur = (cmd->cmd_hcur + 1) % cmd->cmd_halloc; |
| |
| if (cmd->cmd_hcur == cmd->cmd_hnew) { |
| (void) strcpy(cmd->cmd_buf, cmd->cmd_linebuf); |
| } else { |
| (void) strcpy(cmd->cmd_buf, |
| cmd->cmd_history[cmd->cmd_hcur]); |
| } |
| |
| cmd->cmd_bufidx = strlen(cmd->cmd_buf); |
| cmd->cmd_buflen = cmd->cmd_bufidx; |
| |
| return (0); |
| } |
| |
| return (-1); |
| } |
| |
| /*ARGSUSED*/ |
| int |
| mdb_cmdbuf_findhist(mdb_cmdbuf_t *cmd, int c) |
| { |
| ssize_t i, n; |
| |
| if (cmd->cmd_buflen != 0) { |
| cmd->cmd_hcur = cmd->cmd_hnew; |
| cmd->cmd_buf[cmd->cmd_buflen] = 0; |
| (void) strcpy(cmd->cmd_linebuf, cmd->cmd_buf); |
| } |
| |
| for (i = cmd->cmd_hcur, n = 0; n < cmd->cmd_hlen; n++) { |
| if (--i < 0) |
| i = cmd->cmd_halloc - 1; |
| |
| if (strstr(cmd->cmd_history[i], cmd->cmd_linebuf) != NULL) { |
| (void) strcpy(cmd->cmd_buf, cmd->cmd_history[i]); |
| cmd->cmd_bufidx = strlen(cmd->cmd_buf); |
| cmd->cmd_buflen = cmd->cmd_bufidx; |
| cmd->cmd_hcur = i; |
| |
| return (0); |
| } |
| } |
| |
| cmd->cmd_hcur = cmd->cmd_hnew; |
| |
| cmd->cmd_bufidx = 0; |
| cmd->cmd_buflen = 0; |
| |
| return (-1); |
| } |