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Diffstat (limited to 'lib/libc/stdtime/strptime.c')
-rw-r--r--lib/libc/stdtime/strptime.c614
1 files changed, 614 insertions, 0 deletions
diff --git a/lib/libc/stdtime/strptime.c b/lib/libc/stdtime/strptime.c
new file mode 100644
index 000000000000..fb94dcd0df43
--- /dev/null
+++ b/lib/libc/stdtime/strptime.c
@@ -0,0 +1,614 @@
+/*
+ * Powerdog Industries kindly requests feedback from anyone modifying
+ * this function:
+ *
+ * Date: Thu, 05 Jun 1997 23:17:17 -0400
+ * From: Kevin Ruddy <kevin.ruddy@powerdog.com>
+ * To: James FitzGibbon <james@nexis.net>
+ * Subject: Re: Use of your strptime(3) code (fwd)
+ *
+ * The reason for the "no mod" clause was so that modifications would
+ * come back and we could integrate them and reissue so that a wider
+ * audience could use it (thereby spreading the wealth). This has
+ * made it possible to get strptime to work on many operating systems.
+ * I'm not sure why that's "plain unacceptable" to the FreeBSD team.
+ *
+ * Anyway, you can change it to "with or without modification" as
+ * you see fit. Enjoy.
+ *
+ * Kevin Ruddy
+ * Powerdog Industries, Inc.
+ */
+/*
+ * Copyright (c) 1994 Powerdog Industries. All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgement:
+ * This product includes software developed by Powerdog Industries.
+ * 4. The name of Powerdog Industries may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY POWERDOG INDUSTRIES ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE POWERDOG INDUSTRIES BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+#ifndef NOID
+static char copyright[] __unused =
+"@(#) Copyright (c) 1994 Powerdog Industries. All rights reserved.";
+static char sccsid[] __unused = "@(#)strptime.c 0.1 (Powerdog) 94/03/27";
+#endif /* !defined NOID */
+#endif /* not lint */
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <time.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+#include "timelocal.h"
+
+static char * _strptime(const char *, const char *, struct tm *, int *, locale_t);
+
+#define asizeof(a) (sizeof (a) / sizeof ((a)[0]))
+
+static char *
+_strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp,
+ locale_t locale)
+{
+ char c;
+ const char *ptr;
+ int i,
+ len;
+ int Ealternative, Oalternative;
+ struct lc_time_T *tptr = __get_current_time_locale(locale);
+
+ ptr = fmt;
+ while (*ptr != 0) {
+ if (*buf == 0)
+ break;
+
+ c = *ptr++;
+
+ if (c != '%') {
+ if (isspace_l((unsigned char)c, locale))
+ while (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ buf++;
+ else if (c != *buf++)
+ return 0;
+ continue;
+ }
+
+ Ealternative = 0;
+ Oalternative = 0;
+label:
+ c = *ptr++;
+ switch (c) {
+ case 0:
+ case '%':
+ if (*buf++ != '%')
+ return 0;
+ break;
+
+ case '+':
+ buf = _strptime(buf, tptr->date_fmt, tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'C':
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ /* XXX This will break for 3-digit centuries. */
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (i < 19)
+ return 0;
+
+ tm->tm_year = i * 100 - 1900;
+ break;
+
+ case 'c':
+ buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'D':
+ buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'E':
+ if (Ealternative || Oalternative)
+ break;
+ Ealternative++;
+ goto label;
+
+ case 'O':
+ if (Ealternative || Oalternative)
+ break;
+ Oalternative++;
+ goto label;
+
+ case 'F':
+ buf = _strptime(buf, "%Y-%m-%d", tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'R':
+ buf = _strptime(buf, "%H:%M", tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'r':
+ buf = _strptime(buf, tptr->ampm_fmt, tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'T':
+ buf = _strptime(buf, "%H:%M:%S", tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'X':
+ buf = _strptime(buf, tptr->X_fmt, tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'x':
+ buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale);
+ if (buf == 0)
+ return 0;
+ break;
+
+ case 'j':
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 3;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++){
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (i < 1 || i > 366)
+ return 0;
+
+ tm->tm_yday = i - 1;
+ break;
+
+ case 'M':
+ case 'S':
+ if (*buf == 0 ||
+ isspace_l((unsigned char)*buf, locale))
+ break;
+
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++){
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+
+ if (c == 'M') {
+ if (i > 59)
+ return 0;
+ tm->tm_min = i;
+ } else {
+ if (i > 60)
+ return 0;
+ tm->tm_sec = i;
+ }
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'H':
+ case 'I':
+ case 'k':
+ case 'l':
+ /*
+ * Of these, %l is the only specifier explicitly
+ * documented as not being zero-padded. However,
+ * there is no harm in allowing zero-padding.
+ *
+ * XXX The %l specifier may gobble one too many
+ * digits if used incorrectly.
+ */
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (c == 'H' || c == 'k') {
+ if (i > 23)
+ return 0;
+ } else if (i > 12)
+ return 0;
+
+ tm->tm_hour = i;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'p':
+ /*
+ * XXX This is bogus if parsed before hour-related
+ * specifiers.
+ */
+ len = strlen(tptr->am);
+ if (strncasecmp_l(buf, tptr->am, len, locale) == 0) {
+ if (tm->tm_hour > 12)
+ return 0;
+ if (tm->tm_hour == 12)
+ tm->tm_hour = 0;
+ buf += len;
+ break;
+ }
+
+ len = strlen(tptr->pm);
+ if (strncasecmp_l(buf, tptr->pm, len, locale) == 0) {
+ if (tm->tm_hour > 12)
+ return 0;
+ if (tm->tm_hour != 12)
+ tm->tm_hour += 12;
+ buf += len;
+ break;
+ }
+
+ return 0;
+
+ case 'A':
+ case 'a':
+ for (i = 0; i < asizeof(tptr->weekday); i++) {
+ len = strlen(tptr->weekday[i]);
+ if (strncasecmp_l(buf, tptr->weekday[i],
+ len, locale) == 0)
+ break;
+ len = strlen(tptr->wday[i]);
+ if (strncasecmp_l(buf, tptr->wday[i],
+ len, locale) == 0)
+ break;
+ }
+ if (i == asizeof(tptr->weekday))
+ return 0;
+
+ tm->tm_wday = i;
+ buf += len;
+ break;
+
+ case 'U':
+ case 'W':
+ /*
+ * XXX This is bogus, as we can not assume any valid
+ * information present in the tm structure at this
+ * point to calculate a real value, so just check the
+ * range for now.
+ */
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (i > 53)
+ return 0;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'w':
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ i = *buf - '0';
+ if (i > 6)
+ return 0;
+
+ tm->tm_wday = i;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'd':
+ case 'e':
+ /*
+ * The %e specifier is explicitly documented as not
+ * being zero-padded but there is no harm in allowing
+ * such padding.
+ *
+ * XXX The %e specifier may gobble one too many
+ * digits if used incorrectly.
+ */
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (i > 31)
+ return 0;
+
+ tm->tm_mday = i;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'B':
+ case 'b':
+ case 'h':
+ for (i = 0; i < asizeof(tptr->month); i++) {
+ if (Oalternative) {
+ if (c == 'B') {
+ len = strlen(tptr->alt_month[i]);
+ if (strncasecmp_l(buf,
+ tptr->alt_month[i],
+ len, locale) == 0)
+ break;
+ }
+ } else {
+ len = strlen(tptr->month[i]);
+ if (strncasecmp_l(buf, tptr->month[i],
+ len, locale) == 0)
+ break;
+ }
+ }
+ /*
+ * Try the abbreviated month name if the full name
+ * wasn't found and Oalternative was not requested.
+ */
+ if (i == asizeof(tptr->month) && !Oalternative) {
+ for (i = 0; i < asizeof(tptr->month); i++) {
+ len = strlen(tptr->mon[i]);
+ if (strncasecmp_l(buf, tptr->mon[i],
+ len, locale) == 0)
+ break;
+ }
+ }
+ if (i == asizeof(tptr->month))
+ return 0;
+
+ tm->tm_mon = i;
+ buf += len;
+ break;
+
+ case 'm':
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (i < 1 || i > 12)
+ return 0;
+
+ tm->tm_mon = i - 1;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 's':
+ {
+ char *cp;
+ int sverrno;
+ long n;
+ time_t t;
+
+ sverrno = errno;
+ errno = 0;
+ n = strtol_l(buf, &cp, 10, locale);
+ if (errno == ERANGE || (long)(t = n) != n) {
+ errno = sverrno;
+ return 0;
+ }
+ errno = sverrno;
+ buf = cp;
+ gmtime_r(&t, tm);
+ *GMTp = 1;
+ }
+ break;
+
+ case 'Y':
+ case 'y':
+ if (*buf == 0 ||
+ isspace_l((unsigned char)*buf, locale))
+ break;
+
+ if (!isdigit_l((unsigned char)*buf, locale))
+ return 0;
+
+ len = (c == 'Y') ? 4 : 2;
+ for (i = 0; len && *buf != 0 &&
+ isdigit_l((unsigned char)*buf, locale); buf++) {
+ i *= 10;
+ i += *buf - '0';
+ len--;
+ }
+ if (c == 'Y')
+ i -= 1900;
+ if (c == 'y' && i < 69)
+ i += 100;
+ if (i < 0)
+ return 0;
+
+ tm->tm_year = i;
+
+ if (*buf != 0 &&
+ isspace_l((unsigned char)*buf, locale))
+ while (*ptr != 0 &&
+ !isspace_l((unsigned char)*ptr, locale))
+ ptr++;
+ break;
+
+ case 'Z':
+ {
+ const char *cp;
+ char *zonestr;
+
+ for (cp = buf; *cp &&
+ isupper_l((unsigned char)*cp, locale); ++cp) {
+ /*empty*/}
+ if (cp - buf) {
+ zonestr = alloca(cp - buf + 1);
+ strncpy(zonestr, buf, cp - buf);
+ zonestr[cp - buf] = '\0';
+ tzset();
+ if (0 == strcmp(zonestr, "GMT")) {
+ *GMTp = 1;
+ } else if (0 == strcmp(zonestr, tzname[0])) {
+ tm->tm_isdst = 0;
+ } else if (0 == strcmp(zonestr, tzname[1])) {
+ tm->tm_isdst = 1;
+ } else {
+ return 0;
+ }
+ buf += cp - buf;
+ }
+ }
+ break;
+
+ case 'z':
+ {
+ int sign = 1;
+
+ if (*buf != '+') {
+ if (*buf == '-')
+ sign = -1;
+ else
+ return 0;
+ }
+
+ buf++;
+ i = 0;
+ for (len = 4; len > 0; len--) {
+ if (isdigit_l((unsigned char)*buf, locale)) {
+ i *= 10;
+ i += *buf - '0';
+ buf++;
+ } else
+ return 0;
+ }
+
+ tm->tm_hour -= sign * (i / 100);
+ tm->tm_min -= sign * (i % 100);
+ *GMTp = 1;
+ }
+ break;
+ }
+ }
+ return (char *)buf;
+}
+
+
+char *
+strptime_l(const char * __restrict buf, const char * __restrict fmt,
+ struct tm * __restrict tm, locale_t loc)
+{
+ char *ret;
+ int gmt;
+ FIX_LOCALE(loc);
+
+ gmt = 0;
+ ret = _strptime(buf, fmt, tm, &gmt, loc);
+ if (ret && gmt) {
+ time_t t = timegm(tm);
+ localtime_r(&t, tm);
+ }
+
+ return (ret);
+}
+char *
+strptime(const char * __restrict buf, const char * __restrict fmt,
+ struct tm * __restrict tm)
+{
+ return strptime_l(buf, fmt, tm, __get_locale());
+}
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