Last change
on this file since 3139 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
1.0 KB
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[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * parse_num.c - Parse the number of blocks
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| 4 | *
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| 5 | * Copyright (C) 2004,2005 Theodore Ts'o <tytso@mit.edu>
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| 6 | *
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| 7 | * This file can be redistributed under the terms of the GNU Library General
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| 8 | * Public License
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| 9 | */
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| 10 |
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| 11 | #include "e2p.h"
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| 12 |
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| 13 | #include <stdlib.h>
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| 14 |
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| 15 | unsigned long parse_num_blocks(const char *arg, int log_block_size)
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| 16 | {
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| 17 | char *p;
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| 18 | unsigned long long num;
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| 19 |
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| 20 | num = strtoull(arg, &p, 0);
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| 21 |
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| 22 | if (p[0] && p[1])
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| 23 | return 0;
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| 24 |
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| 25 | switch (*p) { /* Using fall-through logic */
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| 26 | case 'T': case 't':
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| 27 | num <<= 10;
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| 28 | case 'G': case 'g':
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| 29 | num <<= 10;
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| 30 | case 'M': case 'm':
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| 31 | num <<= 10;
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| 32 | case 'K': case 'k':
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| 33 | num >>= log_block_size;
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| 34 | break;
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| 35 | case 's':
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| 36 | num >>= 1;
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| 37 | break;
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| 38 | case '\0':
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| 39 | break;
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| 40 | default:
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| 41 | return 0;
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| 42 | }
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| 43 | return num;
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| 44 | }
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| 45 |
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| 46 | #ifdef DEBUG
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| 47 | #include <unistd.h>
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| 48 | #include <stdio.h>
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| 49 |
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| 50 | main(int argc, char **argv)
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| 51 | {
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| 52 | unsigned long num;
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| 53 | int log_block_size = 0;
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| 54 |
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| 55 | if (argc != 2) {
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| 56 | fprintf(stderr, "Usage: %s arg\n", argv[0]);
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| 57 | exit(1);
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| 58 | }
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| 59 |
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| 60 | num = parse_num_blocks(argv[1], log_block_size);
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| 61 |
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| 62 | printf("Parsed number: %lu\n", num);
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| 63 | exit(0);
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| 64 | }
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| 65 | #endif
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