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Introduce nob_get_file_stat & Nob_Time_Stamp #222

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Introduce nob_get_file_stat & Nob_Time_Stamp #222

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121 changes: 117 additions & 4 deletions nob.h
100644 → 100755
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
/* nob - v3.5.0 - Public Domain - https://github.com/tsoding/nob.h
/* nob - v3.6.0 - Public Domain - https://github.com/tsoding/nob.h

This library is the next generation of the [NoBuild](https://github.com/tsoding/nobuild) idea.

Expand Down Expand Up @@ -254,12 +254,28 @@ typedef enum {
NOB_FILE_OTHER,
} Nob_File_Type;

typedef struct {
long sec;
long nsec;
} Nob_Time_Stamp;

typedef struct {
Nob_File_Type type;
uint64_t size; // size in bytes
Nob_Time_Stamp last_accessed;
Nob_Time_Stamp last_modified;
bool error; // TODO: there might be a better way
} Nob_File_Stat;

NOBDEF bool nob_mkdir_if_not_exists(const char *path);
NOBDEF bool nob_copy_file(const char *src_path, const char *dst_path);
NOBDEF bool nob_copy_directory_recursively(const char *src_path, const char *dst_path);
NOBDEF bool nob_read_entire_dir(const char *parent, Nob_File_Paths *children);
NOBDEF bool nob_write_entire_file(const char *path, const void *data, size_t size);
NOBDEF bool nob_ts_is_newer(Nob_Time_Stamp a, Nob_Time_Stamp b);
NOBDEF bool nob_ts_is_equal(Nob_Time_Stamp a, Nob_Time_Stamp b);
NOBDEF Nob_File_Type nob_get_file_type(const char *path);
NOBDEF Nob_File_Stat nob_get_file_stat(const char *path);
NOBDEF bool nob_delete_file(const char *path);

typedef enum {
Expand Down Expand Up @@ -638,7 +654,7 @@ NOBDEF uint64_t nob_nanos_since_unspecified_epoch(void);
// if (!nob_cmd_run(&cmd, .stdin_path = "input.txt", .stdout_path = "output.txt")) fail();
// ```
typedef struct {
Nob_Fd *fdin;
Nob_Fd *fdin;
Nob_Fd *fdout;
Nob_Fd *fderr;
} Nob_Cmd_Redirect;
Expand Down Expand Up @@ -2137,6 +2153,16 @@ NOBDEF bool nob_write_entire_file(const char *path, const void *data, size_t siz
return result;
}

NOBDEF bool nob_ts_is_newer(Nob_Time_Stamp a, Nob_Time_Stamp b) {
if (a.sec > b.sec) return true;
if (a.sec < b.sec) return false;
return a.nsec > b.nsec;
}

NOBDEF bool nob_ts_is_equal(Nob_Time_Stamp a, Nob_Time_Stamp b) {
return a.sec == b.sec && a.nsec == b.nsec;
}

NOBDEF Nob_File_Type nob_get_file_type(const char *path)
{
#ifdef _WIN32
Expand All @@ -2147,7 +2173,7 @@ NOBDEF Nob_File_Type nob_get_file_type(const char *path)
}

if (attr & FILE_ATTRIBUTE_DIRECTORY) return NOB_FILE_DIRECTORY;
// TODO: detect symlinks on Windows (whatever that means on Windows anyway)
if (attr & FILE_ATTRIBUTE_REPARSE_POINT) return NOB_FILE_SYMLINK;
return NOB_FILE_REGULAR;
#else // _WIN32
struct stat statbuf;
Expand All @@ -2163,6 +2189,84 @@ NOBDEF Nob_File_Type nob_get_file_type(const char *path)
#endif // _WIN32
}

#ifdef _WIN32
static Nob_Time_Stamp nob__win32_ft_to_ts(FILETIME ft) {
ULARGE_INTEGER t;
t.LowPart = ft.dwLowDateTime;
t.HighPart = ft.dwHighDateTime;

const uint64_t WINDOWS_TICK = 10000000ULL;
const uint64_t SEC_TO_UNIX_EPOCH = 11644473600ULL;

uint64_t seconds = t.QuadPart / WINDOWS_TICK;
uint64_t remainder = t.QuadPart % WINDOWS_TICK;

Nob_Time_Stamp res;
res.sec = (long)(seconds - SEC_TO_UNIX_EPOCH);
res.nsec = (long)(remainder * 100); // 100ns -> ns

return res;
}
#endif

NOBDEF Nob_File_Stat nob_get_file_stat(const char *path) {
Nob_File_Stat statres = { NOB_FILE_OTHER, 0, {0}, {0}, 0};

#ifdef _WIN32
WIN32_FILE_ATTRIBUTE_DATA data;

if (!GetFileAttributesExA(path, GetFileExInfoStandard, &data)) {
nob_log(NOB_ERROR, "Could not stat %s: %s",
path,
nob_win32_error_message(GetLastError()));
statres.error = true;
return statres;
}

statres.last_accessed = nob__win32_ft_to_ts(data.ftLastAccessTime);
statres.last_modified = nob__win32_ft_to_ts(data.ftLastWriteTime);

statres.size = ((uint64_t)data.nFileSizeHigh << 32) | data.nFileSizeLow;

if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) statres.type = NOB_FILE_DIRECTORY;
else if (data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) statres.type = NOB_FILE_SYMLINK;
else statres.type = NOB_FILE_REGULAR;

return statres;
#else
struct stat statbuf;
if (lstat(path, &statbuf) < 0) {
nob_log(NOB_ERROR, "Could not get stat of %s: %s", path, strerror(errno));
statres.error = true;
return statres;
}


#if defined(st_atim)
statres.last_accessed.sec = statbuf.st_atim.tv_sec;
statres.last_accessed.nsec = statbuf.st_atim.tv_nsec;

statres.last_modified.sec = statbuf.st_mtim.tv_sec;
statres.last_modified.nsec = statbuf.st_mtim.tv_nsec;

#else // old posix
statres.last_accessed.sec = statbuf.st_atime;
statres.last_accessed.nsec = 0;

statres.last_modified.sec = statbuf.st_mtime;
statres.last_modified.nsec = 0;
#endif

statres.size = statbuf.st_size;

if (S_ISREG(statbuf.st_mode)) statres.type = NOB_FILE_REGULAR;
if (S_ISDIR(statbuf.st_mode)) statres.type = NOB_FILE_DIRECTORY;
if (S_ISLNK(statbuf.st_mode)) statres.type = NOB_FILE_SYMLINK;

return statres;
#endif
}

NOBDEF bool nob_delete_file(const char *path)
{
#ifndef NOB_NO_ECHO
Expand Down Expand Up @@ -2844,7 +2948,10 @@ NOBDEF char *nob_temp_running_executable_path(void)
#define walk_dir nob_walk_dir
#define walk_dir_opt nob_walk_dir_opt
#define write_entire_file nob_write_entire_file
#define ts_is_newer nob_ts_is_newer
#define ts_is_equal nob_ts_is_equal
#define get_file_type nob_get_file_type
#define get_file_stat nob_get_file_stat
#define delete_file nob_delete_file
#define Dir_Entry Nob_Dir_Entry
#define dir_entry_open nob_dir_entry_open
Expand Down Expand Up @@ -2958,7 +3065,13 @@ NOBDEF char *nob_temp_running_executable_path(void)

/*
Revision history:

3.6.0 (2026-03-13) Introduce file statistics (by @Samisalami05)
- Add nob_get_file_stat
- Add nob_ts_is_newer
- Add nob_ts_is_equal
- Add Nob_Time_Stamp
- Add Nob_File_Stat
- Fix symlink file type on windows
3.5.0 (2026-03-13) Add nob_null_log_handler (by @rexim)
Rename nob_log_handler to Nob_Log_Handler (by @rexim)
3.4.0 (2026-03-12) Add nob_da_first() (by @rexim)
Expand Down