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Diffstat (limited to 'contrib/unbound/compat/strptime.c')
| -rw-r--r-- | contrib/unbound/compat/strptime.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/contrib/unbound/compat/strptime.c b/contrib/unbound/compat/strptime.c new file mode 100644 index 0000000..9a0caa5 --- /dev/null +++ b/contrib/unbound/compat/strptime.c @@ -0,0 +1,345 @@ +/** strptime workaround (for oa macos leopard) + * This strptime follows the man strptime (2001-11-12) + * conforming to SUSv2, POSIX.1-2001 + * + * This very simple version of strptime has no: + * - E alternatives + * - O alternatives + * - Glibc additions + * - Does not process week numbers + * - Does not properly processes year day + * + * LICENSE + * Copyright (c) 2008, NLnet Labs, Matthijs Mekking + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of NLnetLabs nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 "config.h" + +#ifndef HAVE_CONFIG_H +#include <time.h> +#endif + +#ifndef STRPTIME_WORKS + +#define TM_YEAR_BASE 1900 + +#include <ctype.h> +#include <string.h> + +static const char *abb_weekdays[] = { + "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL +}; +static const char *full_weekdays[] = { + "Sunday", "Monday", "Tuesday", "Wednesday", + "Thursday", "Friday", "Saturday", NULL +}; +static const char *abb_months[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL +}; +static const char *full_months[] = { + "January", "February", "March", "April", "May", "June", + "July", "August", "September", "October", "November", "December", NULL +}; +static const char *ampm[] = { + "am", "pm", NULL +}; + +static int +match_string(const char **buf, const char **strs) +{ + int i = 0; + + for (i = 0; strs[i] != NULL; i++) { + int len = strlen(strs[i]); + if (strncasecmp (*buf, strs[i], len) == 0) { + *buf += len; + return i; + } + } + return -1; +} + +static int +str2int(const char **buf, int max) +{ + int ret=0, count=0; + + while (*buf[0] != '\0' && isdigit(*buf[0]) && count<max) { + ret = ret*10 + (*buf[0] - '0'); + (*buf)++; + count++; + } + + if (!count) + return -1; + return ret; +} + +/** Converts the character string s to values which are stored in tm + * using the format specified by format + **/ +char * +unbound_strptime(const char *s, const char *format, struct tm *tm) +{ + int c, ret; + int split_year = 0; + + while ((c = *format) != '\0') { + /* whitespace, literal or format */ + if (isspace(c)) { /* whitespace */ + /** whitespace matches zero or more whitespace characters in the + * input string. + **/ + while (isspace(*s)) + s++; + } + else if (c == '%') { /* format */ + format++; + c = *format; + switch (c) { + case '%': /* %% is converted to % */ + if (*s != c) { + return NULL; + } + s++; + break; + case 'a': /* weekday name, abbreviated or full */ + case 'A': + ret = match_string(&s, full_weekdays); + if (ret < 0) + ret = match_string(&s, abb_weekdays); + if (ret < 0) { + return NULL; + } + tm->tm_wday = ret; + break; + case 'b': /* month name, abbreviated or full */ + case 'B': + case 'h': + ret = match_string(&s, full_months); + if (ret < 0) + ret = match_string(&s, abb_months); + if (ret < 0) { + return NULL; + } + tm->tm_mon = ret; + break; + case 'c': /* date and time representation */ + if (!(s = unbound_strptime(s, "%x %X", tm))) { + return NULL; + } + break; + case 'C': /* century number */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 99) { /* must be in [00,99] */ + return NULL; + } + + if (split_year) { + tm->tm_year = ret*100 + (tm->tm_year%100); + } + else { + tm->tm_year = ret*100 - TM_YEAR_BASE; + split_year = 1; + } + break; + case 'd': /* day of month */ + case 'e': + ret = str2int(&s, 2); + if (ret < 1 || ret > 31) { /* must be in [01,31] */ + return NULL; + } + tm->tm_mday = ret; + break; + case 'D': /* equivalent to %m/%d/%y */ + if (!(s = unbound_strptime(s, "%m/%d/%y", tm))) { + return NULL; + } + break; + case 'H': /* hour */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 23) { /* must be in [00,23] */ + return NULL; + } + tm->tm_hour = ret; + break; + case 'I': /* 12hr clock hour */ + ret = str2int(&s, 2); + if (ret < 1 || ret > 12) { /* must be in [01,12] */ + return NULL; + } + if (ret == 12) /* actually [0,11] */ + ret = 0; + tm->tm_hour = ret; + break; + case 'j': /* day of year */ + ret = str2int(&s, 2); + if (ret < 1 || ret > 366) { /* must be in [001,366] */ + return NULL; + } + tm->tm_yday = ret; + break; + case 'm': /* month */ + ret = str2int(&s, 2); + if (ret < 1 || ret > 12) { /* must be in [01,12] */ + return NULL; + } + /* months go from 0-11 */ + tm->tm_mon = (ret-1); + break; + case 'M': /* minute */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 59) { /* must be in [00,59] */ + return NULL; + } + tm->tm_min = ret; + break; + case 'n': /* arbitrary whitespace */ + case 't': + while (isspace(*s)) + s++; + break; + case 'p': /* am pm */ + ret = match_string(&s, ampm); + if (ret < 0) { + return NULL; + } + if (tm->tm_hour < 0 || tm->tm_hour > 11) { /* %I */ + return NULL; + } + + if (ret == 1) /* pm */ + tm->tm_hour += 12; + break; + case 'r': /* equivalent of %I:%M:%S %p */ + if (!(s = unbound_strptime(s, "%I:%M:%S %p", tm))) { + return NULL; + } + break; + case 'R': /* equivalent of %H:%M */ + if (!(s = unbound_strptime(s, "%H:%M", tm))) { + return NULL; + } + break; + case 'S': /* seconds */ + ret = str2int(&s, 2); + /* 60 may occur for leap seconds */ + /* earlier 61 was also allowed */ + if (ret < 0 || ret > 60) { /* must be in [00,60] */ + return NULL; + } + tm->tm_sec = ret; + break; + case 'T': /* equivalent of %H:%M:%S */ + if (!(s = unbound_strptime(s, "%H:%M:%S", tm))) { + return NULL; + } + break; + case 'U': /* week number, with the first Sun of Jan being w1 */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 53) { /* must be in [00,53] */ + return NULL; + } + /** it is hard (and not necessary for nsd) to determine time + * data from week number. + **/ + break; + case 'w': /* day of week */ + ret = str2int(&s, 1); + if (ret < 0 || ret > 6) { /* must be in [0,6] */ + return NULL; + } + tm->tm_wday = ret; + break; + case 'W': /* week number, with the first Mon of Jan being w1 */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 53) { /* must be in [00,53] */ + return NULL; + } + /** it is hard (and not necessary for nsd) to determine time + * data from week number. + **/ + break; + case 'x': /* date format */ + if (!(s = unbound_strptime(s, "%m/%d/%y", tm))) { + return NULL; + } + break; + case 'X': /* time format */ + if (!(s = unbound_strptime(s, "%H:%M:%S", tm))) { + return NULL; + } + break; + case 'y': /* last two digits of a year */ + ret = str2int(&s, 2); + if (ret < 0 || ret > 99) { /* must be in [00,99] */ + return NULL; + } + if (split_year) { + tm->tm_year = ((tm->tm_year/100) * 100) + ret; + } + else { + split_year = 1; + + /** currently: + * if in [0,68] we are in 21th century, + * if in [69,99] we are in 20th century. + **/ + if (ret < 69) /* 2000 */ + ret += 100; + tm->tm_year = ret; + } + break; + case 'Y': /* year */ + ret = str2int(&s, 4); + if (ret < 0 || ret > 9999) { + return NULL; + } + tm->tm_year = ret - TM_YEAR_BASE; + break; + case '\0': + default: /* unsupported, cannot match format */ + return NULL; + break; + } + } + else { /* literal */ + /* if input cannot match format, return NULL */ + if (*s != c) + return NULL; + s++; + } + + format++; + } + + /* return pointer to remainder of s */ + return (char*) s; +} + +#endif /* STRPTIME_WORKS */ |
