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| 1 | /* | |||
| 2 | * linux/fs/ext3/bitmap.c | |||
| 3 | * | |||
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 | |||
| 5 | * Remy Card (card@masi.ibp.fr) | |||
| 6 | * Laboratoire MASI - Institut Blaise Pascal | |||
| 7 | * Universite Pierre et Marie Curie (Paris VI) | |||
| 8 | */ | |||
| 9 | ||||
| 10 | #ifdef EXT3FS_DEBUG | |||
| 11 | ||||
| 12 | #include <linux/buffer_head.h> | |||
| 13 | ||||
| 14 | #include "ext3_fs.h" | |||
| 15 | ||||
| 16 | static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0}; | |||
| 17 | ||||
| 18 | unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars) | |||
| 19 | { | |||
| 20 | unsigned int i; | |||
| 21 | unsigned long sum = 0; | |||
| 22 | ||||
| 23 | if (!map) | |||
| 24 | return (0); | |||
| 25 | for (i = 0; i < numchars; i++) | |||
| 26 | sum += nibblemap[map->b_data[i] & 0xf] + | |||
| 27 | nibblemap[(map->b_data[i] >> 4) & 0xf]; | |||
| 28 | return (sum); | |||
| 29 | } | |||
| 30 | ||||
| 31 | #endif /* EXT3FS_DEBUG */ | |||
| 32 | ||||
| ***TER 100% (0/0) of SOURCE FILE bitmap.c | ||||