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73561cc75a
Various fixes, cleanups and shrinkage: saves 952 Bytes: text data bss dec hex filename 1087742 15853 790632 1894227 1ce753 ../busybox/busybox.old 1086790 15853 790632 1893275 1ce39b busybox via: # scripts/bloat-o-meter ../busybox/busybox_unstripped.old busybox_unstripped function old new delta ipcrm_main 756 822 +66 getval - 61 +61 maybe_set_utc - 40 +40 udhcpc_main 2896 2912 +16 md5_hash_block 428 437 +9 opt 8 16 +8 qgravechar 106 110 +4 make_bitmap 292 295 +3 inflate_unzip 2056 2059 +3 add_partition 1412 1414 +2 __parsespent 156 158 +2 qrealloc 41 42 +1 format - 1 +1 catv_main 313 314 +1 watch_main 293 292 -1 varunset 81 80 -1 part 1 - -1 check_if_skip 837 836 -1 start_stop_daemon_main 840 837 -3 create_lost_and_found 175 172 -3 supress_non_delimited_lines 4 - -4 static.l 4 - -4 static.c 5 1 -4 bsd_sum_file 237 233 -4 eval2 338 332 -6 arithmetic_common 166 158 -8 cmpfunc 22 5 -17 cksum_main 294 275 -19 cmp_main 465 439 -26 dd_main 1535 1508 -27 rmmod_main 376 333 -43 cut_file 727 644 -83 ipcs_main 3809 3721 -88 cut_main 722 614 -108 date_main 1443 1263 -180 remove_ids 222 - -222 ------------------------------------------------------------------------------ (add/remove: 3/4 grow/shrink: 11/18 up/down: 217/-853) Total: -636 bytes
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* cksum - calculate the CRC32 checksum of a file
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*
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* Copyright (C) 2006 by Rob Sullivan, with ideas from code by Walter Harms
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */
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#include "busybox.h"
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int cksum_main(int argc, char **argv)
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{
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uint32_t *crc32_table = crc32_filltable(1);
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FILE *fp;
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uint32_t crc;
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long length, filesize;
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int bytes_read;
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char *cp;
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int inp_stdin = (argc == optind) ? 1 : 0;
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do {
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fp = bb_wfopen_input((inp_stdin) ? bb_msg_standard_input : *++argv);
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crc = 0;
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length = 0;
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while ((bytes_read = fread(bb_common_bufsiz1, 1, BUFSIZ, fp)) > 0) {
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cp = bb_common_bufsiz1;
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length += bytes_read;
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while (bytes_read--)
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crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ (*cp++)) & 0xffL];
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}
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filesize = length;
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for (; length; length >>= 8)
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crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ length) & 0xffL];
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crc ^= 0xffffffffL;
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if (inp_stdin) {
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bb_printf("%" PRIu32 " %li\n", crc, filesize);
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break;
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}
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bb_printf("%" PRIu32 " %li %s\n", crc, filesize, *argv);
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fclose(fp);
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} while (*(argv + 1));
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return EXIT_SUCCESS;
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}
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