diff options
Diffstat (limited to 'mdk-stage1/dietlibc/libugly/strftime.c')
| -rw-r--r-- | mdk-stage1/dietlibc/libugly/strftime.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libugly/strftime.c b/mdk-stage1/dietlibc/libugly/strftime.c new file mode 100644 index 000000000..b7e750ab1 --- /dev/null +++ b/mdk-stage1/dietlibc/libugly/strftime.c @@ -0,0 +1,182 @@ +#include <sys/types.h> +#include <time.h> + +static char *sweekdays[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"}; +static char *weekdays[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; +static char *smonths[]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; +static char *months[]={"January","February","March","April","May","June","July","August","September","October","November","December"}; +static char *ampm[]={"am","pm","AM","PM"}; + +static int i2a(char* dest,unsigned int x) { + register unsigned int tmp=x; + register int len=0; + *dest++=tmp/10+'0'; tmp=tmp%10; ++len; + *dest++=tmp+'0'; + return 2; +} + +static int i2as(char* dest,unsigned int x) { + int len=i2a(dest,x); + if (*dest=='0') *dest=' '; + return len; +} + +size_t strftime(char *s, size_t max, const char *format, const struct tm *tm) { + char *t=s; + const char *src; + char buf[5]; + while (*format) { + switch (*format) { + case 0: break; + case '%': + switch (*++format) { + case '%': *t='%'; ++t; break; + case 'a': src=sweekdays[tm->tm_wday]; goto append; + case 'A': src=weekdays[tm->tm_wday]; goto append; + case 'h': + case 'b': src=smonths[tm->tm_mon]; goto append; + case 'B': src=months[tm->tm_mon]; goto append; + case 'c': t+=strftime(t,max-(t-s),"%b %a %d %k:%M:%S %Z %Y",tm); break; + case 'C': buf[i2a(buf,(tm->tm_year+1900)/100)]=0; src=buf; goto append; + case 'd': buf[i2a(buf,tm->tm_mday)]=0; src=buf; goto append; + case 'e': buf[i2as(buf,tm->tm_mday)]=0; src=buf; goto append; + case 'H': buf[i2a(buf,tm->tm_hour)]=0; src=buf; goto append; + case 'I': buf[i2a(buf,tm->tm_hour%12)]=0; src=buf; goto append; + case 'j': buf[i2a(buf,tm->tm_yday)]=0; src=buf; goto append; + case 'k': buf[i2as(buf,tm->tm_hour)]=0; src=buf; goto append; + case 'l': buf[i2as(buf,tm->tm_hour%12)]=0; src=buf; goto append; + case 'm': buf[i2a(buf,tm->tm_mon+1)]=0; src=buf; goto append; + case 'M': buf[i2a(buf,tm->tm_min)]=0; src=buf; goto append; + case 'n': *t='\n'; break; + case 'p': src=ampm[tm->tm_hour>11?3:2]; goto append; + case 'P': src=ampm[tm->tm_hour>11?1:0]; goto append; + case 'r': t+=strftime(t,max-(t-s),"%I:%M:%S %p",tm); break; + case 'R': t+=strftime(t,max-(t-s),"%H:%M",tm); break; + case 'S': buf[i2a(buf,tm->tm_sec)]=0; src=buf; goto append; + case 't': *t='\t'; break; + case 'T': t+=strftime(t,max-(t-s),"%H:%M:%S",tm); break; + case 'u': buf[i2a(buf,tm->tm_wday?tm->tm_wday:7)]=0; src=buf; goto append; + case 'w': buf[i2a(buf,tm->tm_wday)]=0; src=buf; goto append; + case 'x': t+=strftime(t,max-(t-s),"%b %a %d",tm); break; + case 'X': t+=strftime(t,max-(t-s),"%k:%M:%S",tm); break; + case 'y': buf[i2a(buf,tm->tm_year%100)]=0; src=buf; goto append; + case 'Y': i2a(buf,(tm->tm_year+1900)/100); buf[i2a(buf+2,(tm->tm_year%100))+2]=0; src=buf; goto append; + case 'Z': src="GMT"; goto append; /* hehe */ +append: + while (*src && t<s+max) { *t=*src; ++t; ++src; } + }; + break; + default: + *t=*format; ++t; + } + ++format; + if (t>=s+max) break; + continue; + } + *t=0; return t-s; +} + + + +/* + %u The day of the week as a decimal, range 1 to 7, + Monday being 1. See also %w. (SU) + + %U The week number of the current year as a decimal + number, range 00 to 53, starting with the first + Sunday as the first day of week 01. See also %V and + %W. + + %V The ISO 8601:1988 week number of the current year + as a decimal number, range 01 to 53, where week 1 + is the first week that has at least 4 days in the + current year, and with Monday as the first day of + the week. See also %U and %W. (SU) + + %w The day of the week as a decimal, range 0 to 6, + Sunday being 0. See also %u. + + %W The week number of the current year as a decimal + number, range 00 to 53, starting with the first + Monday as the first day of week 01. + + %x The preferred date representation for the current + locale without the time. + + %X The preferred time representation for the current + locale without the date. + + %y The year as a decimal number without a century + (range 00 to 99). + + %Y The year as a decimal number including the century. + + %z The time-zone as hour offset from GMT. Required to + emit RFC822-conformant dates (using "%a, %d %b %Y + %H:%M:%S %z"). (GNU) + + %Z The time zone or name or abbreviation. + + %+ The date and time in date(1) format. (TZ) + + %% A literal `%' character. + + Some conversion specifiers can be modified by preceding + them by the E or O modifier to indicate that an alterna + tive format should be used. If the alternative format or + specification does not exist for the current locale, the + behaviour will be as if the unmodified conversion specifi + cation were used. (SU) The Single Unix Specification men + tions %Ec, %EC, %Ex, %EX, %Ry, %EY, %Od, %Oe, %OH, %OI, + %Om, %OM, %OS, %Ou, %OU, %OV, %Ow, %OW, %Oy, where the + effect of the O modifier is to use alternative numeric + symbols (say, roman numerals), and that of the E modifier + + + +GNU 29 March 1999 3 + + + + + +STRFTIME(3) Linux Programmer's Manual STRFTIME(3) + + + is to use a locale-dependent alternative representation. + + The broken-down time structure tm is defined in <time.h>. + See also ctime(3). + + +RETURN VALUE + The strftime() function returns the number of characters + placed in the array s, not including the terminating NUL + character, provided the string, including the terminating + NUL, fits. Otherwise, it returns 0, and the contents of + the array is undefined. (Thus at least since libc 4.4.4; + very old versions of libc, such as libc 4.4.1, would + return max if the array was too small.) + + Note that the return value 0 does not necessarily indicate + an error; for example, in many locales %p yields an empty + string. + +ENVIRONMENT + The environment variables TZ and LC_TIME are used. + +CONFORMING TO + ANSI C, SVID 3, ISO 9899. There are strict inclusions + between the set of conversions given in ANSI C (unmarked), + those given in the Single Unix Specification (marked SU), + those given in Olson's timezone package (marked TZ), and + those given in glibc (marked GNU), except that %+ is not + supported in glibc2. On the other hand glibc2 has several + more extensions. POSIX.1 only refers to ANSI C; POSIX.2 + describes under date(1) several extensions that could + apply to strftime as well. + +SEE ALSO + date(1), time(2), ctime(3), setlocale(3), sprintf(3) + +*/ |