-/* cksum -- calculate and print POSIX.2 checksums and sizes of files
- Copyright (C) 1992, 1995 Free Software Foundation, Inc.
+/* cksum -- calculate and print POSIX checksums and sizes of files
+ Copyright (C) 92, 1995-2006, 2008 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
\f
/* Written by Q. Frank Xia, qx@math.columbia.edu.
Cosmetic changes and reorganization by David MacKenzie, djm@gnu.ai.mit.edu.
The code segment between "#ifdef CRCTAB" and "#else" is the code
which calculates the "crctab". It is included for those who want
verify the correctness of the "crctab". To recreate the "crctab",
- do following:
+ do something like the following:
cc -DCRCTAB -o crctab cksum.c
crctab > crctab.h
- As Bruce Evans pointed out to me, the crctab in the sample C code
- in 4.9.10 Rationale of P1003.2/D11.2 is represented in reversed order.
- Namely, 0x01 is represented as 0x80, 0x02 is represented as 0x40, etc.
- The generating polynomial is crctab[0x80]=0xedb88320 instead of
- crctab[1]=0x04C11DB7. But the code works only for a non-reverse order
- crctab. Therefore, the sample implementation is wrong.
-
This software is compatible with neither the System V nor the BSD
- `sum' program. It is supposed to conform to P1003.2/D11.2,
- except foreign language interface (4.9.5.3 of P1003.2/D11.2) support.
- Any inconsistency with the standard except 4.9.5.3 is a bug. */
+ `sum' program. It is supposed to conform to POSIX, except perhaps
+ for foreign language support. Any inconsistency with the standard
+ (other than foreign language support) is a bug. */
#include <config.h>
-#ifdef CRCTAB
+/* The official name of this program (e.g., no `g' prefix). */
+#define PROGRAM_NAME "cksum"
+
+#define AUTHORS proper_name ("Q. Frank Xia")
#include <stdio.h>
+#include <sys/types.h>
+#include <stdint.h>
+#include "system.h"
-#define BIT(x) ( (unsigned long)1 << (x) )
-#define SBIT BIT(31)
+#ifdef CRCTAB
+
+# define BIT(x) ((uint_fast32_t) 1 << (x))
+# define SBIT BIT (31)
/* The generating polynomial is
The i bit in GEN is set if X^i is a summand of G(X) except X^32. */
-#define GEN (BIT(26)|BIT(23)|BIT(22)|BIT(16)|BIT(12)|BIT(11)|BIT(10)\
- |BIT(8) |BIT(7) |BIT(5) |BIT(4) |BIT(2) |BIT(1) |BIT(0));
+# define GEN (BIT (26) | BIT (23) | BIT (22) | BIT (16) | BIT (12) \
+ | BIT (11) | BIT (10) | BIT (8) | BIT (7) | BIT (5) \
+ | BIT (4) | BIT (2) | BIT (1) | BIT (0))
-static unsigned long r[8];
+static uint_fast32_t r[8];
static void
-fill_r ()
+fill_r (void)
{
int i;
r[0] = GEN;
for (i = 1; i < 8; i++)
- r[i] = (r[i - 1] & SBIT) ? (r[i - 1] << 1) ^ r[0] : r[i - 1] << 1;
+ r[i] = (r[i - 1] << 1) ^ ((r[i - 1] & SBIT) ? GEN : 0);
}
-static unsigned long
-remainder (m)
- int m;
+static uint_fast32_t
+crc_remainder (int m)
{
- unsigned long rem = 0;
+ uint_fast32_t rem = 0;
int i;
for (i = 0; i < 8; i++)
if (BIT (i) & m)
- rem = rem ^ r[i];
+ rem ^= r[i];
return rem & 0xFFFFFFFF; /* Make it run on 64-bit machine. */
}
-void
-main ()
+int
+main (void)
{
int i;
fill_r ();
- printf ("unsigned long crctab[256] = {\n 0x0");
+ printf ("static uint_fast32_t const crctab[256] =\n{\n 0x00000000");
for (i = 0; i < 51; i++)
{
- printf (",\n 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X",
- remainder (i * 5 + 1), remainder (i * 5 + 2), remainder (i * 5 + 3),
- remainder (i * 5 + 4), remainder (i * 5 + 5));
+ printf (",\n 0x%08x, 0x%08x, 0x%08x, 0x%08x, 0x%08x",
+ crc_remainder (i * 5 + 1), crc_remainder (i * 5 + 2),
+ crc_remainder (i * 5 + 3), crc_remainder (i * 5 + 4),
+ crc_remainder (i * 5 + 5));
}
printf ("\n};\n");
- exit (0);
+ exit (EXIT_SUCCESS);
}
#else /* !CRCTAB */
-#include <stdio.h>
-#include <getopt.h>
-#include <sys/types.h>
-#include "system.h"
-#include "version.h"
-#include "error.h"
+# include <getopt.h>
+# include "long-options.h"
+# include "error.h"
/* Number of bytes to read at once. */
-#define BUFLEN (1 << 16)
-
-/* The name this program was run with. */
-char *program_name;
-
-/* If nonzero, display usage information and exit. */
-static int show_help;
+# define BUFLEN (1 << 16)
-/* If nonzero, print the version on standard output then exit. */
-static int show_version;
-
-static struct option const long_options[] =
+static uint_fast32_t const crctab[256] =
{
- {"help", no_argument, &show_help, 1},
- {"version", no_argument, &show_version, 1},
- {0, 0, 0, 0}
-};
-
-static unsigned long const crctab[256] =
-{
- 0x0,
- 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
- 0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6,
- 0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
- 0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC,
- 0x5BD4B01B, 0x569796C2, 0x52568B75, 0x6A1936C8, 0x6ED82B7F,
- 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A,
- 0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
- 0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58,
- 0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033,
- 0xA4AD16EA, 0xA06C0B5D, 0xD4326D90, 0xD0F37027, 0xDDB056FE,
- 0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
- 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4,
- 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0,
- 0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5,
- 0x2AC12072, 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16,
- 0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA, 0x7897AB07,
- 0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C,
- 0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1,
- 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
- 0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B,
- 0xBB60ADFC, 0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698,
- 0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D,
- 0x94EA7B2A, 0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E,
- 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2, 0xC6BCF05F,
- 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,
- 0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80,
- 0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
- 0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A,
- 0x58C1663D, 0x558240E4, 0x51435D53, 0x251D3B9E, 0x21DC2629,
- 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C,
- 0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
- 0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E,
- 0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65,
- 0xEBA91BBC, 0xEF68060B, 0xD727BBB6, 0xD3E6A601, 0xDEA580D8,
- 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
- 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2,
- 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71,
- 0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74,
- 0x857130C3, 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640,
- 0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C, 0x7B827D21,
- 0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A,
- 0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E, 0x18197087,
- 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
- 0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D,
- 0x2056CD3A, 0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE,
- 0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB,
- 0xDBEE767C, 0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18,
- 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4, 0x89B8FD09,
- 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662,
- 0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF,
- 0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
+ 0x00000000,
+ 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
+ 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6,
+ 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
+ 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac,
+ 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f,
+ 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a,
+ 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
+ 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58,
+ 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033,
+ 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, 0xddb056fe,
+ 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
+ 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4,
+ 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
+ 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5,
+ 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
+ 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, 0x7897ab07,
+ 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c,
+ 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1,
+ 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
+ 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b,
+ 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698,
+ 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d,
+ 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
+ 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, 0xc6bcf05f,
+ 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
+ 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80,
+ 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
+ 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a,
+ 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, 0x21dc2629,
+ 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c,
+ 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
+ 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e,
+ 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65,
+ 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, 0xdea580d8,
+ 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
+ 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2,
+ 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
+ 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74,
+ 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
+ 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, 0x7b827d21,
+ 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a,
+ 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, 0x18197087,
+ 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
+ 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d,
+ 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce,
+ 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb,
+ 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
+ 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, 0x89b8fd09,
+ 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
+ 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf,
+ 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
};
/* Nonzero if any of the files read were the standard input. */
-static int have_read_stdin;
+static bool have_read_stdin;
/* Calculate and print the checksum and length in bytes
of file FILE, or of the standard input if FILE is "-".
- If PRINT_NAME is nonzero, print FILE next to the checksum and size.
- Return 0 if successful, -1 if an error occurs. */
+ If PRINT_NAME is true, print FILE next to the checksum and size.
+ Return true if successful. */
-static int
-cksum (char *file, int print_name)
+static bool
+cksum (const char *file, bool print_name)
{
unsigned char buf[BUFLEN];
- unsigned long crc = 0;
- long length = 0;
- long bytes_read;
- register FILE *fp;
-
- if (!strcmp (file, "-"))
+ uint_fast32_t crc = 0;
+ uintmax_t length = 0;
+ size_t bytes_read;
+ FILE *fp;
+ char length_buf[INT_BUFSIZE_BOUND (uintmax_t)];
+ char const *hp;
+
+ if (STREQ (file, "-"))
{
fp = stdin;
- have_read_stdin = 1;
+ have_read_stdin = true;
+ if (O_BINARY && ! isatty (STDIN_FILENO))
+ freopen (NULL, "rb", stdin);
}
else
{
- fp = fopen (file, "r");
+ fp = fopen (file, (O_BINARY ? "rb" : "r"));
if (fp == NULL)
{
error (0, errno, "%s", file);
- return -1;
+ return false;
}
}
{
unsigned char *cp = buf;
+ if (length + bytes_read < length)
+ error (EXIT_FAILURE, 0, _("%s: file too long"), file);
length += bytes_read;
while (bytes_read--)
- crc = (crc << 8) ^ crctab[((crc >> 24) ^ *(cp++)) & 0xFF];
+ crc = (crc << 8) ^ crctab[((crc >> 24) ^ *cp++) & 0xFF];
+ if (feof (fp))
+ break;
}
if (ferror (fp))
{
error (0, errno, "%s", file);
- if (strcmp (file, "-"))
+ if (!STREQ (file, "-"))
fclose (fp);
- return -1;
+ return false;
}
- if (strcmp (file, "-") && fclose (fp) == EOF)
+ if (!STREQ (file, "-") && fclose (fp) == EOF)
{
error (0, errno, "%s", file);
- return -1;
+ return false;
}
- bytes_read = length;
- while (bytes_read > 0)
- {
- crc = (crc << 8) ^ crctab[((crc >> 24) ^ bytes_read) & 0xFF];
- bytes_read >>= 8;
- }
+ hp = umaxtostr (length, length_buf);
+
+ for (; length; length >>= 8)
+ crc = (crc << 8) ^ crctab[((crc >> 24) ^ length) & 0xFF];
crc = ~crc & 0xFFFFFFFF;
- printf ("%10lu %8ld", crc, length);
if (print_name)
- printf (" %s", file);
- putchar ('\n');
+ printf ("%u %s %s\n", (unsigned int) crc, hp, file);
+ else
+ printf ("%u %s\n", (unsigned int) crc, hp);
- return 0;
+ if (ferror (stdout))
+ error (EXIT_FAILURE, errno, "-: %s", _("write error"));
+
+ return true;
}
-static void
+void
usage (int status)
{
- if (status != 0)
+ if (status != EXIT_SUCCESS)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("\
-Usage: %s [OPTION]... [FILE]...\n\
+Usage: %s [FILE]...\n\
+ or: %s [OPTION]\n\
"),
- program_name);
- printf (_("\
+ program_name, program_name);
+ fputs (_("\
Print CRC checksum and byte counts of each FILE.\n\
\n\
- --help display this help and exit\n\
- --version output version information and exit\n\
-"));
+"), stdout);
+ fputs (HELP_OPTION_DESCRIPTION, stdout);
+ fputs (VERSION_OPTION_DESCRIPTION, stdout);
+ emit_bug_reporting_address ();
}
exit (status);
}
-void
+int
main (int argc, char **argv)
{
- int i, c;
- int errors = 0;
+ int i;
+ bool ok;
- program_name = argv[0];
+ initialize_main (&argc, &argv);
+ set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
- have_read_stdin = 0;
+ atexit (close_stdout);
- while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF)
- {
- switch (c)
- {
- case 0:
- break;
+ parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE, Version,
+ usage, AUTHORS, (char const *) NULL);
+ if (getopt_long (argc, argv, "", NULL, NULL) != -1)
+ usage (EXIT_FAILURE);
- default:
- usage (1);
- }
- }
+ have_read_stdin = false;
- if (show_version)
- {
- printf ("cksum - %s\n", version_string);
- exit (0);
- }
-
- if (show_help)
- usage (0);
-
- if (optind >= argc)
- {
- if (cksum ("-", 0) < 0)
- errors = 1;
- }
+ if (optind == argc)
+ ok = cksum ("-", false);
else
{
+ ok = true;
for (i = optind; i < argc; i++)
- if (cksum (argv[i], 1) < 0)
- errors = 1;
+ ok &= cksum (argv[i], true);
}
if (have_read_stdin && fclose (stdin) == EOF)
- error (1, errno, "-");
- exit (errors);
+ error (EXIT_FAILURE, errno, "-");
+ exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
#endif /* !CRCTAB */
projects / platform / upstream / coreutils.git / blobdiff