diff options
Diffstat (limited to 'include/c.h')
| -rw-r--r-- | include/c.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/c.h b/include/c.h index 2b70e8d..61b95ab 100644 --- a/include/c.h +++ b/include/c.h @@ -213,6 +213,14 @@ (type *)( (char *)__mptr - offsetof(type,member) );}) #endif +#define read_unaligned_member(p, m) __extension__ ({ \ + size_t offset = offsetof(__typeof__(* p), m); \ + __typeof__(p->m + 0) v; \ + memcpy(&v, ((unsigned char *)p) + offset, sizeof(v)); \ + v; }) + +#define member_ptr(p, m) (((unsigned char *)p) + offsetof(__typeof__(*p), m)) + #ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME # ifdef HAVE___PROGNAME extern char *__progname; @@ -294,6 +302,9 @@ void __err_oom(const char *file, unsigned int line) } #define err_oom() __err_oom(__FILE__, __LINE__) +#define err_nosys(exitcode, ...) \ + err(errno == ENOSYS ? EXIT_NOTSUPP : exitcode, __VA_ARGS__) + /* Don't use inline function to avoid '#include "nls.h"' in c.h */ @@ -449,6 +460,7 @@ static inline void __attribute__((__noreturn__)) ul_sig_err(int excode, const ch #define USAGE_COMMANDS _("\nCommands:\n") #define USAGE_ARGUMENTS _("\nArguments:\n") #define USAGE_COLUMNS _("\nAvailable output columns:\n") +#define USAGE_DEFAULT_COLUMNS _("\nDefault columns:\n") #define USAGE_SEPARATOR "\n" #define USAGE_OPTSTR_HELP _("display this help") @@ -498,6 +510,12 @@ static inline void print_features(const char **features, const char *prefix) exit(eval); \ }) +static inline int fputsln(const char *s, FILE *stream) { + if (fputs(s, stream) == EOF) + return EOF; + return fputc('\n', stdout); +} + /* * seek stuff */ @@ -564,4 +582,17 @@ static inline void print_features(const char **features, const char *prefix) #define SINT_MAX(t) (((t)1 << (sizeof(t) * 8 - 2)) - (t)1 + ((t)1 << (sizeof(t) * 8 - 2))) +#ifndef HAVE_REALLOCARRAY +static inline void *reallocarray(void *ptr, size_t nmemb, size_t size) +{ + size_t s = nmemb * size; + + if (nmemb != 0 && s / nmemb != size) { + errno = ENOMEM; + return NULL; + } + return realloc(ptr, s); +} +#endif + #endif /* UTIL_LINUX_C_H */ |