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| author | Denys Vlasenko | 2018-09-28 15:13:04 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-09-28 15:13:04 +0200 |
| commit | abfa3ec0598ff431407224c6b81682f7d0d35495 (patch) | |
| tree | e5387999595e1f0c383c4aced38fe5a24dd90ef0 /include/libbb.h | |
| parent | aae428f0bf0fcd6cd0a2503b3a50de43785b8fd0 (diff) | |
| download | busybox-abfa3ec0598ff431407224c6b81682f7d0d35495.zip busybox-abfa3ec0598ff431407224c6b81682f7d0d35495.tar.gz | |
move storage helpers to libbb.h
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'include/libbb.h')
| -rw-r--r-- | include/libbb.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/libbb.h b/include/libbb.h index 7cad12c..61fa1e0 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -2127,6 +2127,23 @@ extern const char bb_default_login_shell[] ALIGN1; # define FB_0 "/dev/fb0" #endif +// storage helpers for mk*fs utilities +char BUG_wrong_field_size(void); +#define STORE_LE(field, value) \ +do { \ + if (sizeof(field) == 4) \ + field = SWAP_LE32((uint32_t)(value)); \ + else if (sizeof(field) == 2) \ + field = SWAP_LE16((uint16_t)(value)); \ + else if (sizeof(field) == 1) \ + field = (uint8_t)(value); \ + else \ + BUG_wrong_field_size(); \ +} while (0) + +#define FETCH_LE32(field) \ + (sizeof(field) == 4 ? SWAP_LE32(field) : BUG_wrong_field_size()) + #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0]))) #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |