/*
* The UCW Library -- Miscellaneous Functions
*
- * (c) 1997--2004 Martin Mares <mj@ucw.cz>
+ * (c) 1997--2007 Martin Mares <mj@ucw.cz>
+ * (c) 2005 Tomas Valla <tom@ucw.cz>
+ * (c) 2006 Robert Spalek <robert@ucw.cz>
+ * (c) 2007 Pavel Charvat <pchar@ucw.cz>
*
* This software may be freely distributed and used according to the terms
* of the GNU Lesser General Public License.
#include "lib/config.h"
#include <stdarg.h>
-/* Tell libc we're going to use all extensions available */
+/* Macros for handling structurues, offsets and alignment */
-#define _GNU_SOURCE
-
-/* Ugly structure handling macros */
-
-#define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
+#define CHECK_PTR_TYPE(x, type) ((x)-(type)(x) + (type)(x))
+#define PTR_TO(s, i) &((s*)0)->i
+#define OFFSETOF(s, i) ((unsigned int) PTR_TO(s, i))
#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
-#define ALIGN(s, a) (((s)+a-1)&~(a-1))
-#define UNALIGNED_PART(ptr, type) (((long) (ptr)) % sizeof(type))
+#define ALIGN_TO(s, a) (((s)+a-1)&~(a-1))
+#define ALIGN_PTR(p, s) ((uintptr_t)(p) % (s) ? (typeof(p))((uintptr_t)(p) + (s) - (uintptr_t)(p) % (s)) : (p))
+#define UNALIGNED_PART(ptr, type) (((uintptr_t) (ptr)) % sizeof(type))
/* Some other macros */
#define ABS(x) ((x) < 0 ? -(x) : (x))
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
#define STRINGIFY(x) #x
+#define STRINGIFY_EXPANDED(x) STRINGIFY(x)
#define GLUE(x,y) x##y
#define GLUE_(x,y) x##_##y
#define COMPARE_LT(x,y) do { if ((x)<(y)) return 1; if ((x)>(y)) return 0; } while(0)
#define COMPARE_GT(x,y) COMPARE_LT(y,x)
+#define ROL(x, bits) (((x) << (bits)) | ((x) >> (sizeof(uns)*8 - (bits)))) /* Bitwise rotation of an uns to the left */
+
/* GCC Extensions */
#ifdef __GNUC__
#define CONSTRUCTOR __attribute__((constructor))
#define PACKED __attribute__((packed))
#define CONST __attribute__((const))
-#define PURE __attribute__((const))
+#define PURE __attribute__((pure))
+#define FORMAT_CHECK(x,y,z) __attribute__((format(x,y,z)))
#define likely(x) __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
+#if __GNUC__ >= 4 || __GNUC__ == 3 && __GNUC_MINOR__ >= 3
+#define ALWAYS_INLINE inline __attribute__((always_inline))
+#define NO_INLINE __attribute__((noinline))
+#else
+#define ALWAYS_INLINE inline
+#endif
+
+#if __GNUC__ >= 4
+#define LIKE_MALLOC __attribute__((malloc))
+#define SENTINEL_CHECK __attribute__((sentinel))
+#else
+#define LIKE_MALLOC
+#define SENTINEL_CHECK
+#endif
+
#else
#error This program requires the GNU C compiler.
#endif
extern char *log_title; /* NULL - print no title, default is log_progname */
extern char *log_filename; /* Expanded name of the current log file */
-extern int log_switch_nest; /* log_switch() nesting counter, increment to disable automatic switches */
+extern volatile int log_switch_nest; /* log_switch() nesting counter, increment to disable automatic switches */
extern int log_pid; /* 0 if shouldn't be logged */
+extern int log_precise_timings; /* Include microsecond timestamps in log messages */
extern void (*log_die_hook)(void);
struct tm;
extern void (*log_switch_hook)(struct tm *tm);
-void log_msg(unsigned int cat, const char *msg, ...) __attribute__((format(printf,2,3)));
-#define log log_msg
-void vlog_msg(unsigned int cat, const char *msg, va_list args);
-void die(byte *, ...) NONRET;
-void log_init(byte *argv0);
-void log_file(byte *name);
+void msg(uns cat, const char *fmt, ...) FORMAT_CHECK(printf,2,3);
+void vmsg(uns cat, const char *fmt, va_list args);
+void die(const char *, ...) NONRET FORMAT_CHECK(printf,1,2);
+void log_init(const char *argv0);
+void log_file(const char *name);
void log_fork(void);
-void log_switch(void);
+int log_switch(void);
-void assert_failed(char *assertion, char *file, int line) NONRET;
+void assert_failed(const char *assertion, const char *file, int line) NONRET;
void assert_failed_noinfo(void) NONRET;
#ifdef DEBUG_ASSERTS
-#define ASSERT(x) do { if (unlikely(!(x))) assert_failed(#x, __FILE__, __LINE__); } while(0)
+#define ASSERT(x) ({ if (unlikely(!(x))) assert_failed(#x, __FILE__, __LINE__); 1; })
#else
-#define ASSERT(x) do { if (__builtin_constant_p(x) && !(x)) assert_failed_noinfo(); } while(0)
+#define ASSERT(x) ({ if (__builtin_constant_p(x) && !(x)) assert_failed_noinfo(); 1; })
#endif
#define COMPILE_ASSERT(name,x) typedef char _COMPILE_ASSERT_##name[!!(x)-1]
#ifdef LOCAL_DEBUG
-#define DBG(x,y...) log(L_DEBUG, x,##y)
+#define DBG(x,y...) msg(L_DEBUG, x,##y)
#else
#define DBG(x,y...) do { } while(0)
#endif
* their own xmalloc and we don't want to interfere with them, hence
* the renaming.
*/
-void *xmalloc(unsigned);
-void *xrealloc(void *, unsigned);
-#define sh_xfree(x) free(x)
+void *xmalloc(uns) LIKE_MALLOC;
+void *xrealloc(void *, uns);
+void xfree(void *);
#endif
-void *xmalloc_zero(unsigned);
-byte *xstrdup(byte *);
+void *xmalloc_zero(uns) LIKE_MALLOC;
+char *xstrdup(const char *) LIKE_MALLOC;
/* Content-Type pattern matching and filters */
-int match_ct_patt(byte *, byte *);
-
-/* log2.c */
-
-int fls(u32);
+int match_ct_patt(const char *, const char *);
/* wordsplit.c */
-int sepsplit(byte *str, byte sep, byte **rec, uns max);
-int wordsplit(byte *, byte **, uns);
+int sepsplit(char *str, uns sep, char **rec, uns max);
+int wordsplit(char *str, char **rec, uns max);
/* pat(i)match.c: Matching of shell patterns */
-int match_pattern(byte *, byte *);
-int match_pattern_nocase(byte *, byte *);
+int match_pattern(const char *patt, const char *str);
+int match_pattern_nocase(const char *patt, const char *str);
/* md5hex.c */
-void md5_to_hex(byte *, byte *);
-void hex_to_md5(byte *, byte *);
+void md5_to_hex(const byte *s, char *d);
+void hex_to_md5(const char *s, byte *d);
#define MD5_SIZE 16
#define MD5_HEX_SIZE 33
/* prime.c */
-int isprime(uns);
-uns nextprime(uns);
+int isprime(uns x);
+uns nextprime(uns x);
+
+/* primetable.c */
+
+uns next_table_prime(uns x);
+uns prev_table_prime(uns x);
/* timer.c */
-void init_timer(void);
-uns get_timer(void);
+timestamp_t get_timestamp(void);
+
+void init_timer(timestamp_t *timer);
+uns get_timer(timestamp_t *timer);
+uns switch_timer(timestamp_t *old, timestamp_t *new);
/* regex.c */
typedef struct regex regex;
-regex *rx_compile(byte *r, int icase);
+regex *rx_compile(const char *r, int icase);
void rx_free(regex *r);
-int rx_match(regex *r, byte *s);
-int rx_subst(regex *r, byte *by, byte *src, byte *dest, uns destlen);
+int rx_match(regex *r, const char *s);
+int rx_subst(regex *r, const char *by, const char *src, char *dest, uns destlen);
/* random.c */
-uns random_max(uns);
+uns random_u32(void);
+uns random_max(uns max);
+u64 random_u64(void);
+u64 random_max_u64(u64 max);
/* mmap.c */
-void *mmap_file(byte *name, unsigned *len, int writeable);
+void *mmap_file(const char *name, unsigned *len, int writeable);
void munmap_file(void *start, unsigned len);
-/* partmap.c */
-
-struct partmap;
-struct partmap *partmap_open(byte *name, int writeable);
-void *partmap_map(struct partmap *p, sh_off_t offset, uns size);
-void partmap_close(struct partmap *p);
-sh_off_t partmap_size(struct partmap *p);
-
/* proctitle.c */
void setproctitle_init(int argc, char **argv);
-void setproctitle(char *msg, ...) __attribute__((format(printf,1,2)));
+void setproctitle(const char *msg, ...) FORMAT_CHECK(printf,1,2);
+char *getproctitle(void);
/* randomkey.c */
/* exitstatus.c */
#define EXIT_STATUS_MSG_SIZE 32
-int format_exit_status(byte *msg, int stat);
+int format_exit_status(char *msg, int stat);
/* runcmd.c */
-int run_command(byte *cmd, ...);
-void NONRET exec_command(byte *cmd, ...);
-void echo_command(byte *buf, int size, byte *cmd, ...);
-int run_command_v(byte *cmd, va_list args);
-void NONRET exec_command_v(byte *cmd, va_list args);
-void echo_command_v(byte *buf, int size, byte *cmd, va_list args);
+int run_command(const char *cmd, ...);
+void NONRET exec_command(const char *cmd, ...);
+void echo_command(char *buf, int size, const char *cmd, ...);
+int run_command_v(const char *cmd, va_list args);
+void NONRET exec_command_v(const char *cmd, va_list args);
+void echo_command_v(char *buf, int size, const char *cmd, va_list args);
/* carefulio.c */
int careful_read(int fd, void *buf, int len);
-int careful_write(int fd, void *buf, int len);
+int careful_write(int fd, const void *buf, int len);
/* sync.c */
-void sync_dir(byte *name);
+void sync_dir(const char *name);
/* sighandler.c */
-typedef int (*sh_sighandler_t)(int);
- /* obtains signum, returns nonzero if abort() should be called */
-extern sh_sighandler_t signal_handler[];
+typedef int (*sh_sighandler_t)(int); // gets signum, returns nonzero if abort() should be called
+
+void handle_signal(int signum);
+void unhandle_signal(int signum);
+sh_sighandler_t set_signal_handler(int signum, sh_sighandler_t new);
+
+/* string.c */
+
+char *str_unesc(char *dest, const char *src);
+char *str_format_flags(char *dest, const char *fmt, uns flags);
+
+/* bigalloc.c */
+
+void *page_alloc(u64 len) LIKE_MALLOC; // allocates a multiple of CPU_PAGE_SIZE bytes with mmap
+void *page_alloc_zero(u64 len) LIKE_MALLOC;
+void page_free(void *start, u64 len);
+void *page_realloc(void *start, u64 old_len, u64 new_len);
-struct sigaction;
-void handle_signal(int signum, struct sigaction *oldact);
-void unhandle_signal(int signum, struct sigaction *oldact);
+void *big_alloc(u64 len) LIKE_MALLOC; // allocate a large memory block in the most efficient way available
+void *big_alloc_zero(u64 len) LIKE_MALLOC;
+void big_free(void *start, u64 len);
#endif
projects / libucw.git / blobdiff