diff options
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 7cad12c44..61fa1e03e 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)])) |