source: rtems/cpukit/libmisc/shell/dd-conv.c @ e4a3d93

4.104.115
Last change on this file since e4a3d93 was e4a3d93, checked in by Chris Johns <chrisj@…>, on Jun 12, 2009 at 5:51:43 AM

2009-06-12 Chris Johns <chrisj@…>

  • libmisc/shell/dd-args.c, libmisc/shell/dd-conv.c, libmisc/shell/dd-conv_tab.c, libmisc/shell/dd-misc.c, libmisc/shell/dd-position.c, libmisc/shell/dd.h, libmisc/shell/extern-dd.h, libmisc/shell/hexdump-conv.c, libmisc/shell/hexdump-display.c, libmisc/shell/hexdump-odsyntax.c, libmisc/shell/hexdump-parse.c, libmisc/shell/hexdump.h, libmisc/shell/hexsyntax.c, libmisc/shell/main_dd.c, libmisc/shell/main_hexdump.c: New.
  • libmisc/Makefile.am, libmisc/shell/shellconfig.h: Add dd and hexdump commands.
  • Property mode set to 100644
File size: 7.1 KB
Line 
1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Keith Muller of the University of California, San Diego and Lance
7 * Visser of Convex Computer Corporation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)conv.c      8.3 (Berkeley) 4/2/94";
37#endif
38#endif /* not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: src/bin/dd/conv.c,v 1.19 2004/04/06 20:06:45 markm Exp $");
41
42#include <sys/param.h>
43
44#include <err.h>
45#include <inttypes.h>
46#include <string.h>
47
48#include "dd.h"
49#include "extern-dd.h"
50
51/*
52 * def --
53 * Copy input to output.  Input is buffered until reaches obs, and then
54 * output until less than obs remains.  Only a single buffer is used.
55 * Worst case buffer calculation is (ibs + obs - 1).
56 */
57void
58def(rtems_shell_dd_globals* globals)
59{
60        u_char *inp;
61        const u_char *t;
62        size_t cnt;
63
64        if ((t = ctab) != NULL)
65                for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
66                        *inp = t[*inp];
67
68        /* Make the output buffer look right. */
69        out.dbp = in.dbp;
70        out.dbcnt = in.dbcnt;
71
72        if (in.dbcnt >= out.dbsz) {
73                /* If the output buffer is full, write it. */
74                dd_out(globals, 0);
75
76                /*
77                 * Ddout copies the leftover output to the beginning of
78                 * the buffer and resets the output buffer.  Reset the
79                 * input buffer to match it.
80                 */
81                in.dbp = out.dbp;
82                in.dbcnt = out.dbcnt;
83        }
84}
85
86void
87def_close(rtems_shell_dd_globals* globals)
88{
89        /* Just update the count, everything is already in the buffer. */
90        if (in.dbcnt)
91                out.dbcnt = in.dbcnt;
92}
93
94/*
95 * Copy variable length newline terminated records with a max size cbsz
96 * bytes to output.  Records less than cbs are padded with spaces.
97 *
98 * max in buffer:  MAX(ibs, cbsz)
99 * max out buffer: obs + cbsz
100 */
101void
102block(rtems_shell_dd_globals* globals)
103{
104        u_char *inp, *outp;
105        const u_char *t;
106        size_t cnt, maxlen;
107        static int intrunc;
108        int ch;
109
110        /*
111         * Record truncation can cross block boundaries.  If currently in a
112         * truncation state, keep tossing characters until reach a newline.
113         * Start at the beginning of the buffer, as the input buffer is always
114         * left empty.
115         */
116        if (intrunc) {
117                for (inp = in.db, cnt = in.dbrcnt; cnt && *inp++ != '\n'; --cnt)
118                        ;
119                if (!cnt) {
120                        in.dbcnt = 0;
121                        in.dbp = in.db;
122                        return;
123                }
124                intrunc = 0;
125                /* Adjust the input buffer numbers. */
126                in.dbcnt = cnt - 1;
127                in.dbp = inp + cnt - 1;
128        }
129
130        /*
131         * Copy records (max cbsz size chunks) into the output buffer.  The
132         * translation is done as we copy into the output buffer.
133         */
134        ch = 0;
135        for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
136                maxlen = MIN(cbsz, in.dbcnt);
137                if ((t = ctab) != NULL)
138                        for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
139                            ++cnt)
140                                *outp++ = t[ch];
141                else
142                        for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
143                            ++cnt)
144                                *outp++ = ch;
145                /*
146                 * Check for short record without a newline.  Reassemble the
147                 * input block.
148                 */
149                if (ch != '\n' && in.dbcnt < cbsz) {
150                        (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
151                        break;
152                }
153
154                /* Adjust the input buffer numbers. */
155                in.dbcnt -= cnt;
156                if (ch == '\n')
157                        --in.dbcnt;
158
159                /* Pad short records with spaces. */
160                if (cnt < cbsz)
161                        (void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
162                else {
163                        /*
164                         * If the next character wouldn't have ended the
165                         * block, it's a truncation.
166                         */
167                        if (!in.dbcnt || *inp != '\n')
168                                ++st.trunc;
169
170                        /* Toss characters to a newline. */
171                        for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt)
172                                ;
173                        if (!in.dbcnt)
174                                intrunc = 1;
175                        else
176                                --in.dbcnt;
177                }
178
179                /* Adjust output buffer numbers. */
180                out.dbp += cbsz;
181                if ((out.dbcnt += cbsz) >= out.dbsz)
182                        dd_out(globals, 0);
183                outp = out.dbp;
184        }
185        in.dbp = in.db + in.dbcnt;
186}
187
188void
189block_close(rtems_shell_dd_globals* globals)
190{
191        /*
192         * Copy any remaining data into the output buffer and pad to a record.
193         * Don't worry about truncation or translation, the input buffer is
194         * always empty when truncating, and no characters have been added for
195         * translation.  The bottom line is that anything left in the input
196         * buffer is a truncated record.  Anything left in the output buffer
197         * just wasn't big enough.
198         */
199        if (in.dbcnt) {
200                ++st.trunc;
201                (void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
202                (void)memset(out.dbp + in.dbcnt, ctab ? ctab[' '] : ' ',
203                    cbsz - in.dbcnt);
204                out.dbcnt += cbsz;
205        }
206}
207
208/*
209 * Convert fixed length (cbsz) records to variable length.  Deletes any
210 * trailing blanks and appends a newline.
211 *
212 * max in buffer:  MAX(ibs, cbsz) + cbsz
213 * max out buffer: obs + cbsz
214 */
215void
216unblock(rtems_shell_dd_globals* globals)
217{
218        u_char *inp;
219        const u_char *t;
220        size_t cnt;
221
222        /* Translation and case conversion. */
223        if ((t = ctab) != NULL)
224                for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
225                        *inp = t[*inp];
226        /*
227         * Copy records (max cbsz size chunks) into the output buffer.  The
228         * translation has to already be done or we might not recognize the
229         * spaces.
230         */
231        for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
232                for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t)
233                        ;
234                if (t >= inp) {
235                        cnt = t - inp + 1;
236                        (void)memmove(out.dbp, inp, cnt);
237                        out.dbp += cnt;
238                        out.dbcnt += cnt;
239                }
240                *out.dbp++ = '\n';
241                if (++out.dbcnt >= out.dbsz)
242                        dd_out(globals, 0);
243        }
244        if (in.dbcnt)
245                (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
246        in.dbp = in.db + in.dbcnt;
247}
248
249void
250unblock_close(rtems_shell_dd_globals* globals)
251{
252        u_char *t;
253        size_t cnt;
254
255        if (in.dbcnt) {
256                warnx("%s: short input record", in.name);
257                for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t)
258                        ;
259                if (t >= in.db) {
260                        cnt = t - in.db + 1;
261                        (void)memmove(out.dbp, in.db, cnt);
262                        out.dbp += cnt;
263                        out.dbcnt += cnt;
264                }
265                ++out.dbcnt;
266                *out.dbp++ = '\n';
267        }
268}
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