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Diffstat (limited to 'shell_cmds/hexdump/odsyntax.c')
-rw-r--r-- | shell_cmds/hexdump/odsyntax.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/shell_cmds/hexdump/odsyntax.c b/shell_cmds/hexdump/odsyntax.c new file mode 100644 index 0000000..6b9202e --- /dev/null +++ b/shell_cmds/hexdump/odsyntax.c @@ -0,0 +1,447 @@ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95"; +#endif +#endif /* not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/hexdump/odsyntax.c,v 1.16 2002/09/04 23:29:01 dwmalone Exp $"); + +#include <sys/types.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <float.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "hexdump.h" + +#define PADDING " " + +int odmode; + +static void odadd(const char *); +static void odformat(const char *); +static const char *odformatfp(char, const char *); +static const char *odformatint(char, const char *); +static void odoffset(int, char ***); +static void odusage(void); + +void +oldsyntax(int argc, char ***argvp) +{ + static char _n[] = "%_n", padding[] = PADDING; + int ch; + char **argv, *end; + + /* Add initial (default) address format. -A may change it later. */ +#define TYPE_OFFSET 7 + add("\"%07.7_Ao\n\""); + add("\"%07.7_ao \""); + + odmode = 1; + argv = *argvp; + while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) + switch (ch) { + case 'A': + switch (*optarg) { + case 'd': case 'o': case 'x': + fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; + fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = + *optarg; + break; + case 'n': + fshead->nextfu->fmt = _n; /* mimic regular output */ + fshead->nextfs->nextfu->fmt = padding; + break; + default: + errx(1, "%s: invalid address base", optarg); + } + break; + case 'a': + odformat("a"); + break; + case 'B': + case 'o': + odformat("o2"); + break; + case 'b': + odformat("o1"); + break; + case 'c': + odformat("c"); + break; + case 'd': + odformat("u2"); + break; + case 'D': + odformat("u4"); + break; + case 'e': /* undocumented in od */ + case 'F': + odformat("fD"); + break; + case 'f': + odformat("fF"); + break; + case 'H': + case 'X': + odformat("x4"); + break; + case 'h': + case 'x': + odformat("x2"); + break; + case 'I': + case 'L': + case 'l': + odformat("dL"); + break; + case 'i': + odformat("dI"); + break; + case 'j': + errno = 0; + skip = strtoll(optarg, &end, 0); + if (*end == 'b') + skip *= 512; + else if (*end == 'k') + skip *= 1024; + else if (*end == 'm') + skip *= 1048576L; + else if (*end == 'g') + skip *= 1073741824; + else if (*end != '\0') + skip = -1; + if (errno != 0 || skip < 0 || strlen(end) > 1) + errx(1, "%s: invalid skip amount", optarg); + break; + case 'N': + if ((length = atoi(optarg)) <= 0) + errx(1, "%s: invalid length", optarg); + break; + case 'O': + odformat("o4"); + break; + case 's': + odformat("d2"); + break; + case 't': + odformat(optarg); + break; + case 'v': + vflag = ALL; + break; + case '?': + default: + odusage(); + } + + if (fshead->nextfs->nextfs == NULL) + odformat("oS"); + + argc -= optind; + *argvp += optind; + + if (argc) + odoffset(argc, argvp); +} + +static void +odusage(void) +{ + + fprintf(stderr, +"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); + fprintf(stderr, +" [[+]offset[.][Bb]] [file ...]\n"); + exit(1); +} + +static void +odoffset(int argc, char ***argvp) +{ + unsigned char *p, *q, *num, *end; + int base; + + /* + * The offset syntax of od(1) was genuinely bizarre. First, if + * it started with a plus it had to be an offset. Otherwise, if + * there were at least two arguments, a number or lower-case 'x' + * followed by a number makes it an offset. By default it was + * octal; if it started with 'x' or '0x' it was hex. If it ended + * in a '.', it was decimal. If a 'b' or 'B' was appended, it + * multiplied the number by 512 or 1024 byte units. There was + * no way to assign a block count to a hex offset. + * + * We assume it's a file if the offset is bad. + */ + p = (unsigned char *)(argc == 1 ? (*argvp)[0] : (*argvp)[1]); + + if (*p != '+' && (argc < 2 || + (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) + return; + + base = 0; + /* + * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and + * set base. + */ + if (p[0] == '+') + ++p; + if (p[0] == 'x' && isxdigit(p[1])) { + ++p; + base = 16; + } else if (p[0] == '0' && p[1] == 'x') { + p += 2; + base = 16; + } + + /* skip over the number */ + if (base == 16) + for (num = p; isxdigit(*p); ++p); + else + for (num = p; isdigit(*p); ++p); + + /* check for no number */ + if (num == p) + return; + q = p; + /* if terminates with a '.', base is decimal */ + if (*q == '.') { + if (base) + return; + base = 10; + q++; + } + + skip = strtoll((const char *)num, (char **)&end, base ? base : 8); + + /* if end isn't the same as p, we got a non-octal digit */ + if (end != p) { + skip = 0; + return; + } + + if (*q) { + if (*q == 'B') { + skip *= 1024; + ++p; + } else if (*q == 'b') { + skip *= 512; + ++q; + } + } + + if (*q) { + skip = 0; + return; + } + + /* + * If the offset uses a non-octal base, the base of the offset + * is changed as well. This isn't pretty, but it's easy. + */ + if (base == 16) { + fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; + fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; + } else if (base == 10) { + fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; + fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; + } + + /* Terminate file list. */ + (*argvp)[1] = NULL; +} + +static void +odformat(const char *fmt) +{ + char fchar; + + while (*fmt != '\0') { + switch ((fchar = *fmt++)) { + case 'a': + odadd("16/1 \"%3_u \" \"\\n\""); + break; + case 'c': + odadd("16/1 \"%3_c \" \"\\n\""); + break; + case 'o': case 'u': case 'd': case 'x': + fmt = odformatint(fchar, fmt); + break; + case 'f': + fmt = odformatfp(fchar, fmt); + break; + default: + errx(1, "%c: unrecognised format character", fchar); + } + } +} + +static const char * +odformatfp(char fchar __unused, const char *fmt) +{ + size_t isize; + int digits; + char *end, *hdfmt; + + isize = sizeof(double); + switch (*fmt) { + case 'F': + isize = sizeof(float); + fmt++; + break; + case 'D': + isize = sizeof(double); + fmt++; + break; + case 'L': + isize = sizeof(long double); + fmt++; + break; + default: + if (isdigit((unsigned char)*fmt)) { + errno = 0; + isize = (size_t)strtoul(fmt, &end, 10); + if (errno != 0 || isize == 0) + errx(1, "%s: invalid size", fmt); + fmt = (const char *)end; + } + } + switch (isize) { + case sizeof(float): + digits = FLT_DIG; + break; + case sizeof(double): + digits = DBL_DIG; + break; + default: + if (isize == sizeof(long double)) + digits = LDBL_DIG; + else + errx(1, "unsupported floating point size %lu", + (u_long)isize); + } + + asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", + 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); + if (hdfmt == NULL) + err(1, NULL); + odadd(hdfmt); + free(hdfmt); + + return (fmt); +} + +static const char * +odformatint(char fchar, const char *fmt) +{ + unsigned long long n; + size_t isize; + int digits; + char *end, *hdfmt; + + isize = sizeof(int); + switch (*fmt) { + case 'C': + isize = sizeof(char); + fmt++; + break; + case 'I': + isize = sizeof(int); + fmt++; + break; + case 'L': + isize = sizeof(long); + fmt++; + break; + case 'S': + isize = sizeof(short); + fmt++; + break; + default: + if (isdigit((unsigned char)*fmt)) { + errno = 0; + isize = (size_t)strtoul(fmt, &end, 10); + if (errno != 0 || isize == 0) + errx(1, "%s: invalid size", fmt); + if (isize != sizeof(char) && isize != sizeof(short) && + isize != sizeof(int) && isize != sizeof(long)) + errx(1, "unsupported int size %lu", + (u_long)isize); + fmt = (const char *)end; + } + } + + /* + * Calculate the maximum number of digits we need to + * fit the number. Overestimate for decimal with log + * base 8. We need one extra space for signed numbers + * to store the sign. + */ + n = (1ULL << (8 * isize)) - 1; + digits = 0; + while (n != 0) { + digits++; + n >>= (fchar == 'x') ? 4 : 3; + } + if (fchar == 'd') + digits++; + asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", + 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), + "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); + if (hdfmt == NULL) + err(1, NULL); + odadd(hdfmt); + free(hdfmt); + + return (fmt); +} + +static void +odadd(const char *fmt) +{ + static int needpad; + + if (needpad) + add("\""PADDING"\""); + add(fmt); + needpad = 1; +} |