diff options
Diffstat (limited to 'filedef.h')
| -rw-r--r-- | filedef.h | 79 |
1 files changed, 66 insertions, 13 deletions
@@ -16,6 +16,7 @@ You should have received a copy of the GNU General Public License along with GNU Make; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + /* Structure that represents the info on one file that the makefile says how to make. All of these are chained together through `next'. */ @@ -32,7 +33,7 @@ struct file char *stem; /* Implicit stem, if an implicit rule has been used */ struct dep *also_make; /* Targets that are made by making this. */ - time_t last_mtime; /* File's modtime, if already known. */ + FILE_TIMESTAMP last_mtime; /* File's modtime, if already known. */ struct file *prev; /* Previous entry for same file name; used when there are multiple double-colon entries for the same file. */ @@ -96,11 +97,62 @@ extern unsigned int num_intermediates; extern struct file *default_goal_file, *suffix_file, *default_file; -extern struct file *lookup_file (), *enter_file (); -extern void remove_intermediates (), snap_deps (); -extern void rename_file (), rehash_file (), file_hash_enter (); -extern void set_command_state (); - +extern struct file *lookup_file PARAMS ((char *name)); +extern struct file *enter_file PARAMS ((char *name)); +extern void remove_intermediates PARAMS ((int sig)); +extern void snap_deps PARAMS ((void)); +extern void rename_file PARAMS ((struct file *file, char *name)); +extern void rehash_file PARAMS ((struct file *file, char *name)); +extern void file_hash_enter PARAMS ((struct file *file, char *name, + unsigned int oldhash, char *oldname)); +extern void set_command_state PARAMS ((struct file *file, int state)); +extern void notice_finished_file PARAMS ((struct file *file)); + + +#if ST_MTIM_NSEC +# define FILE_TIMESTAMP_STAT_MODTIME(st) \ + FILE_TIMESTAMP_FROM_S_AND_NS ((st).st_mtim.tv_sec, \ + (st).st_mtim.ST_MTIM_NSEC) +# define FILE_TIMESTAMPS_PER_S \ + MIN ((FILE_TIMESTAMP) 1000000000, \ + (INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \ + / INTEGER_TYPE_MAXIMUM (time_t))) +#else +# define FILE_TIMESTAMP_STAT_MODTIME(st) ((st).st_mtime) +# define FILE_TIMESTAMPS_PER_S 1 +#endif + +#define FILE_TIMESTAMP_FROM_S_AND_NS(s, ns) \ + ((s) * FILE_TIMESTAMPS_PER_S \ + + (ns) * FILE_TIMESTAMPS_PER_S / 1000000000) +#define FILE_TIMESTAMP_DIV(a, b) ((a)/(b) - ((a)%(b) < 0)) +#define FILE_TIMESTAMP_MOD(a, b) ((a)%(b) + ((a)%(b) < 0) * (b)) +#define FILE_TIMESTAMP_S(ts) FILE_TIMESTAMP_DIV ((ts), FILE_TIMESTAMPS_PER_S) +#define FILE_TIMESTAMP_NS(ts) \ + (((FILE_TIMESTAMP_MOD ((ts), FILE_TIMESTAMPS_PER_S) * 1000000000) \ + + (FILE_TIMESTAMPS_PER_S - 1)) \ + / FILE_TIMESTAMPS_PER_S) + +/* Upper bound on length of string "YYYY-MM-DD HH:MM:SS.NNNNNNNNN" + representing a file timestamp. The upper bound is not necessarily 19, + since the year might be less than -999 or greater than 9999. + + Subtract one for the sign bit if in case file timestamps can be negative; + subtract FLOOR_LOG2_SECONDS_PER_YEAR to yield an upper bound on how many + file timestamp bits might affect the year; + 302 / 1000 is log10 (2) rounded up; + add one for integer division truncation; + add one more for a minus sign if file timestamps can be negative; + add 4 to allow for any 4-digit epoch year (e.g. 1970); + add 25 to allow for "-MM-DD HH:MM:SS.NNNNNNNNN". */ +#define FLOOR_LOG2_SECONDS_PER_YEAR 24 +#define FILE_TIMESTAMP_PRINT_LEN_BOUND \ + (((sizeof (FILE_TIMESTAMP) * CHAR_BIT - 1 - FLOOR_LOG2_SECONDS_PER_YEAR) \ + * 302 / 1000) \ + + 1 + 1 + 4 + 25) + +extern FILE_TIMESTAMP file_timestamp_now PARAMS ((void)); +extern void file_timestamp_sprintf PARAMS ((char *p, FILE_TIMESTAMP ts)); /* Return the mtime of file F (a struct file *), caching it. The value is -1 if the file does not exist. */ @@ -110,9 +162,9 @@ extern void set_command_state (); we don't find it. The value is -1 if the file does not exist. */ #define file_mtime_no_search(f) file_mtime_1 ((f), 0) -extern time_t f_mtime (); +extern FILE_TIMESTAMP f_mtime PARAMS ((struct file *file, int search)); #define file_mtime_1(f, v) \ - ((f)->last_mtime != (time_t) 0 ? (f)->last_mtime : f_mtime ((f), v)) + ((f)->last_mtime ? (f)->last_mtime : f_mtime ((f), v)) /* Modtime value to use for `infinitely new'. We used to get the current time from the system and use that whenever we wanted `new'. But that causes @@ -121,12 +173,13 @@ extern time_t f_mtime (); targets, which need to be considered newer than anything that depends on them, even if said dependents' modtimes are in the future. - If time_t is unsigned, its maximum value is the same as "(time_t) -1", - so use one less than that, because -1 is used for non-existing files. */ + If FILE_TIMESTAMP is unsigned, its maximum value is the same as + ((FILE_TIMESTAMP) -1), so use one less than that, because -1 is + used for non-existing files. */ #define NEW_MTIME \ - (INTEGER_TYPE_SIGNED (time_t) \ - ? INTEGER_TYPE_MAXIMUM (time_t) \ - : (INTEGER_TYPE_MAXIMUM (time_t) - 1)) + (INTEGER_TYPE_SIGNED (FILE_TIMESTAMP) \ + ? INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \ + : (INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) - 1)) #define check_renamed(file) \ while ((file)->renamed != 0) (file) = (file)->renamed /* No ; here. */ |