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fix(userspace/libc): fix tzset() function

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
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EnderIce2 2025-02-22 03:26:49 +02:00
parent f6f46d1bbe
commit 7f3b2b4dbb
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1 changed files with 50 additions and 51 deletions
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101
Userspace/libc/src/std/time.c
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@ -204,63 +204,62 @@ export int timespec_get(struct timespec *, int);
export void tzset(void)
{
char *tz = getenv("TZ");
if (tz == NULL)
if (!tz || tz[0] == '\0')
{
tzname[0] = "UTC";
tzname[1] = "UTC";
daylight = 0;
timezone = 0;
daylight = 0;
return;
}
char std[16];
int i = 0;
while (tz[i] && ((tz[i] >= 'A' && tz[i] <= 'Z') || (tz[i] >= 'a' && tz[i] <= 'z')))
{
std[i] = tz[i];
i++;
}
std[i] = '\0';
tzname[0] = strdup(std);
int sign = 1;
if (tz[i] == '-')
{
sign = -1;
i++;
}
else if (tz[i] == '+')
{
sign = 1;
i++;
}
int offset = 0;
while (tz[i] && tz[i] >= '0' && tz[i] <= '9')
{
offset = offset * 10 + (tz[i] - '0');
i++;
}
timezone = offset * 3600 * sign;
char dst[16];
int j = 0;
if (tz[i] != '\0')
{
while (tz[i] && ((tz[i] >= 'A' && tz[i] <= 'Z') || (tz[i] >= 'a' && tz[i] <= 'z')))
dst[j++] = tz[i++];
dst[j] = '\0';
tzname[1] = strdup(dst);
daylight = 1;
}
else
{
if (strcmp(tz, "EST5EDT") == 0)
{
tzname[0] = "EST";
tzname[1] = "EDT";
daylight = 1;
timezone = 5 * 3600;
}
else if (strcmp(tz, "GMT0") == 0)
{
tzname[0] = "GMT";
tzname[1] = "GMT";
daylight = 0;
timezone = 0;
}
else if (strcmp(tz, "JST-9") == 0)
{
tzname[0] = "JST";
tzname[1] = "JST";
daylight = 0;
timezone = -9 * 3600;
}
else if (strcmp(tz, "MET-1MEST") == 0)
{
tzname[0] = "MET";
tzname[1] = "MEST";
daylight = 1;
timezone = -1 * 3600;
}
else if (strcmp(tz, "MST7MDT") == 0)
{
tzname[0] = "MST";
tzname[1] = "MDT";
daylight = 1;
timezone = 7 * 3600;
}
else if (strcmp(tz, "PST8PDT") == 0)
{
tzname[0] = "PST";
tzname[1] = "PDT";
daylight = 1;
timezone = 8 * 3600;
}
else
{
tzname[0] = "UTC";
tzname[1] = "UTC";
daylight = 0;
timezone = 0;
}
tzname[1] = tzname[0];
daylight = 0;
}
}