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Use mg_snprintf()

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Sergey Lyubka committed 2022-02-10 11:56:55 +00:00
1 parent 9e634310b4
commit f64c86d23f
22 files changed
+659 -458
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src/fs_fat.c
+37 -1
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@@ -3,6 +3,42 @@
#if MG_ENABLE_FATFS
#include <ff.h>
static int mg_days_from_epoch(int y, int m, int d) {
y -= m <= 2;
int era = y / 400;
int yoe = y - era * 400;
int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1;
int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy;
return era * 146097 + doe - 719468;
}
static time_t mg_timegm(struct tm const *t) {
int year = t->tm_year + 1900;
int month = t->tm_mon; // 0-11
if (month > 11) {
year += month / 12;
month %= 12;
} else if (month < 0) {
int years_diff = (11 - month) / 12;
year -= years_diff;
month += 12 * years_diff;
}
int x = mg_days_from_epoch(year, month + 1, t->tm_mday);
return 60 * (60 * (24L * x + t->tm_hour) + t->tm_min) + t->tm_sec;
}
static time_t ff_time_to_epoch(uint16_t fdate, uint16_t ftime) {
struct tm tm;
memset(&tm, 0, sizeof(struct tm));
tm.tm_sec = (ftime << 1) & 0x3e;
tm.tm_min = ((ftime >> 5) & 0x3f);
tm.tm_hour = ((ftime >> 11) & 0x1f);
tm.tm_mday = (fdate & 0x1f);
tm.tm_mon = ((fdate >> 5) & 0x0f) - 1;
tm.tm_year = ((fdate >> 9) & 0x7f) + 80;
return mg_timegm(&tm);
}
static int ff_stat(const char *path, size_t *size, time_t *mtime) {
FILINFO fi;
if (path[0] == '\0' || strcmp(path, MG_FATFS_ROOT) == 0) {
@@ -11,7 +47,7 @@ static int ff_stat(const char *path, size_t *size, time_t *mtime) {
return MG_FS_DIR;
} else if (f_stat(path, &fi) == 0) {
if (size) *size = (size_t) fi.fsize;
if (mtime) *mtime = (fi.fdate << 16) | fi.ftime;
if (mtime) *mtime = ff_time_to_epoch(fi.fdate, fi.ftime);
return MG_FS_READ | MG_FS_WRITE | ((fi.fattrib & AM_DIR) ? MG_FS_DIR : 0);
} else {
return 0;