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Diffstat (limited to 'util-linux/e2p/parse_num.c')
-rw-r--r-- | util-linux/e2p/parse_num.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/util-linux/e2p/parse_num.c b/util-linux/e2p/parse_num.c new file mode 100644 index 000000000..3910e70de --- /dev/null +++ b/util-linux/e2p/parse_num.c @@ -0,0 +1,64 @@ +/* + * parse_num.c - Parse the number of blocks + * + * Copyright (C) 2004,2005 Theodore Ts'o <tytso@mit.edu> + * + * This file can be redistributed under the terms of the GNU Library General + * Public License + */ + +#include "e2p.h" + +#include <stdlib.h> + +unsigned long parse_num_blocks(const char *arg, int log_block_size) +{ + char *p; + unsigned long long num; + + num = strtoull(arg, &p, 0); + + if (p[0] && p[1]) + return 0; + + switch (*p) { /* Using fall-through logic */ + case 'T': case 't': + num <<= 10; + case 'G': case 'g': + num <<= 10; + case 'M': case 'm': + num <<= 10; + case 'K': case 'k': + num >>= log_block_size; + break; + case 's': + num >>= 1; + break; + case '\0': + break; + default: + return 0; + } + return num; +} + +#ifdef DEBUG +#include <unistd.h> +#include <stdio.h> + +main(int argc, char **argv) +{ + unsigned long num; + int log_block_size = 0; + + if (argc != 2) { + fprintf(stderr, "Usage: %s arg\n", argv[0]); + exit(1); + } + + num = parse_num_blocks(argv[1], log_block_size); + + printf("Parsed number: %lu\n", num); + exit(0); +} +#endif |