diff options
Diffstat (limited to 'compat-util.h')
| -rw-r--r-- | compat-util.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/compat-util.h b/compat-util.h index 60c4081..8b70b52 100644 --- a/compat-util.h +++ b/compat-util.h @@ -15,6 +15,7 @@ #include <stdlib.h> #include <errno.h> #include <assert.h> +#include <stdint.h> #ifndef O_NOATIME # define O_NOATIME 0 @@ -37,4 +38,21 @@ static inline size_t page_size(void) #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) +/* + * converts a C string to a non-negative off_t value, taking base into + * account. On error, it'll return a negative value and set errno + * to EINVAL + */ +static off_t cstr_to_off_t(const char *nptr, char **endptr, int base) +{ + if (sizeof(long) == 8 || (sizeof(long) == 4 && sizeof(off_t) == 4)) + return (off_t)strtol(nptr, endptr, base); + else if (sizeof(off_t) == 8 && sizeof(long) == 4) + return (off_t)strtoll(nptr, endptr, base); + + fprintf(stderr, "unrecognized sizes:\n\toff_t: %u\n\tlong: %u\n", + sizeof(off_t), sizeof(long)); + exit(1); +} + #endif /* OS_COMPAT_H */ |